JP3209642B2 - Waveguide splitter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveguide duplexer for splitting a microwave band signal by a waveguide.

[0002]

2. Description of the Related Art The configuration of a conventional waveguide duplexer is shown in FIG.
This will be described with reference to FIG. FIG. 15 is, for example, the document number MW72-73 of the IEICE Microwave Research Group.
It is a perspective view showing the conventional waveguide duplexer shown in (September 1972).

In FIG. 15, reference numeral 101 denotes a common waveguide, 1
02 is a first waveguide filter, and 103 is a second waveguide filter. 104 and 105 are rectangular waveguides, 1
06a to 106c, 107a to 107c are iris, 1
08 and 109 are coupling holes, 110 and 111 are flanges, 1
12 is a short-circuit end, and 113 is a resonance frequency adjusting screw. Here, the first and second waveguide filters 102 and 10
3 denotes rectangular waveguides 104 and 105, irises 106a to
106c, 107a to 107c and coupling holes 108, 1
09 and is fixed to the common waveguide 101 by flanges 110 and 111. Coupling holes 108, 109
Is provided substantially at the center of the connection surface between the waveguide filters 102 and 103 and the common waveguide 101, and the resonance frequency adjusting screw 113 is provided at the center of the wide surface of the waveguide filters 102 and 103. The distal end of the common waveguide 101 is short-circuited by the short-circuit end 112.

Next, the operation of the conventional waveguide duplexer will be described. The first waveguide filter 102 has a frequency f1
And the magnitudes of the irises 106a to 106c are adjusted so that the center frequency is passed as the center frequency, and the resonance frequency and the irises 107a to 107c are set so that the second waveguide filter 103 passes with the frequency f2 as the center frequency.
The size of c has been adjusted. The distance between the coupling holes 108 and 109 and the short-circuit end 112 is selected to be an integral multiple of 1/2 of the guide wavelengths λg1 and λg2 with respect to the frequencies f1 and f2, respectively. For waves, the first and second waveguide filters 10
2 and 103 are reflected because they do not resonate.
1 and f2, the coupling hole 10 is located at a position where the distance from the short-circuit end 112 is an integral multiple of 2/1 of the guide wavelengths λg1 and λg2.
8 and 109 are maximized in the longitudinal direction, and the first magnetic field is efficiently transmitted through the coupling holes 108 and 109 provided at that position.
And split into the second waveguide filters 102 and 103.

[0005]

In the conventional waveguide duplexer as described above, in a waveguide filter connected at a position distant from the short-circuited end, the short-circuit between the position where the waveguide filter is connected and the short-circuit is made. The electrical length between the end and the end largely depends on the change in the frequency. Therefore, the change in the coupling amount between the waveguide filter and the common waveguide with respect to the change in the frequency is large, and the characteristics are good over a wide frequency band. There was a problem that it was difficult.

In addition, since the waveguide filter is connected to the common waveguide using the coupling hole, there is a problem that a portion where an electric field is concentrated occurs near the coupling hole, and the power durability is poor.

Further, when a plurality of waveguide filters are arranged close to each other, there is a problem that a sufficient interval cannot be secured between the waveguide filters.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a waveguide duplexer which can improve the characteristics of a plurality of waveguide filters over a wide frequency band. The purpose is to gain. It is another object of the present invention to provide a waveguide duplexer capable of realizing a structure excellent in power durability by suppressing concentration of an electric field. It is a further object of the present invention to provide a waveguide duplexer that enables a close arrangement of a waveguide filter.

[0009]

Means for Solving the Problems] waveguide demultiplexer according to claim 1 of the present invention, a common waveguide rectangular waveguide tube, wherein
Electric field and the flat of the TE ₁₀ mode which is a fundamental mode of the common waveguide
A waveguide filter connected to the side walls of the row , the common waveguide is composed of an input / output terminal connected to an antenna, and a short-circuited end provided at a tip opposite to the input / output terminal, The waveguide filter includes a rectangular waveguide, an input / output terminal for a signal of a first frequency, and a resonance frequency that is provided on an inner wall of the rectangular waveguide and passes through the first frequency as a center frequency. A first inductive iris whose size is adjusted, and a distance from a short-circuited end of the common waveguide to the first frequency, are those composed of a second inductive iris coupled to the side wall of one quarter of the guide wavelength.

[0010] waveguide demultiplexer according to claim 2 of the invention, TE ₁₀ mode which is the fundamental mode of the common waveguide
A second waveguide filter connected to a second side wall parallel to the electric field, the second waveguide filter being provided at a position substantially opposite to the waveguide filter with the common waveguide interposed therebetween; A waveguide filter, a second rectangular waveguide, a second input / output terminal for a signal having a second frequency different from the first frequency,
A third inductive iris provided on an inner wall of the second rectangular waveguide, the resonant frequency and the size of which are adjusted to pass the second frequency as a center frequency, and the second rectangular waveguide; provided on the inner wall of the tube, the common distance from the short-circuited end of the waveguide is a quarter of the guide wavelength of the common waveguide for said second frequency, before the opposite side of the side wall
And a fourth inductive iris coupled to the second side wall.

[0011] waveguide demultiplexer according to claim 3 of the invention, TE ₁₀ mode which is the fundamental mode of the common waveguide
A third waveguide filter connected to a second side wall parallel to the electric field and provided on the same side as the second waveguide filter, wherein the third waveguide filter includes a third waveguide filter; A third waveguide provided on an inner wall of the third rectangular waveguide, a third input / output terminal of a signal having a third frequency different from the first and second frequencies, and a third waveguide provided on an inner wall of the third rectangular waveguide. A fifth inductive iris whose resonance frequency and size are adjusted so as to pass the frequency as a center frequency, and a distance from a short-circuit end of the common waveguide provided on an inner wall of the third rectangular waveguide. And a sixth inductive iris coupled to said second side wall for three quarters of the guide wavelength of said common waveguide for said third frequency.

According to a fourth aspect of the present invention, there is provided a waveguide duplexer comprising: a rectangular waveguide common waveguide; and a base of the common waveguide.
First side wall parallel to electric field of TE ₁₀ mode which is this mode
A first waveguide filter of a first frequency connected to
Field of TE ₁₀ mode which is a fundamental mode of said common waveguide
And a second frequency different from the first frequency provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween. Wherein the common waveguide comprises a rectangular waveguide portion, an input / output terminal connected to an antenna, a short-circuited end provided at a tip opposite to the input / output terminal, A first waveguide connected to a waveguide portion and having a width through which the first frequency is cut off and the second frequency passes; and a first waveguide connected to the first waveguide and the short-circuit end. A second waveguide having a width at which the first and second frequencies are cut off, wherein the first waveguide filter comprises a first rectangular waveguide, and a signal having the first frequency. A first input / output terminal, and an inner wall of the first rectangular waveguide, the first input / output terminal passing through the first frequency as a center frequency. So that a first inductive iris resonant frequency and magnitude is adjusted, the common waveguide the waveguide parts and the first distance from the connection position of the waveguide of the first It is composed of a first coupling hole coupled to the first side wall of one half the guide wavelength of the common waveguide for the frequency, the second waveguide filters, second
, A second input / output terminal for a signal of the second frequency, and an inner wall of the second rectangular waveguide, which resonate so as to pass the second frequency as a center frequency. A second inductive iris frequency and magnitude adjusted;
A distance of the common waveguide from a connection position of the first and second waveguides is a half of a guide wavelength of the common waveguide with respect to the second frequency; are those composed of a second coupling hole coupled to the second side wall opposite the side wall.

According to a fifth aspect of the present invention, there is provided a waveguide duplexer including a rectangular waveguide common waveguide and a base of the common waveguide.
First side wall parallel to electric field of TE ₁₀ mode which is this mode
A first waveguide filter of a first frequency connected to
Field of TE ₁₀ mode which is a fundamental mode of said common waveguide
And a second frequency different from the first frequency provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween. Wherein the common waveguide comprises a rectangular waveguide portion, an input / output terminal connected to an antenna, a short-circuited end provided at a tip opposite to the input / output terminal, A first waveguide connected to a waveguide portion and having a width through which the first frequency is cut off and the second frequency passes; and a first waveguide connected to the first waveguide and the short-circuit end. A second waveguide having a width at which the first and second frequencies are cut off, wherein the first waveguide filter comprises a first rectangular waveguide, and a signal having the first frequency. And an input / output terminal provided on the inner wall of the first rectangular waveguide and passing through the first frequency as a center frequency. A first inductive iris resonant frequency and magnitude has been adjusted, is provided on the inner wall of the first rectangular waveguide, the waveguide parts and the first waveguide of said common waveguide composed of a second inductive iris distance from the connecting position of the tube is coupled to the <br/> first side wall of one half the guide wavelength of the common waveguide for said first frequency Wherein the second waveguide filter comprises: a second rectangular waveguide; a second input / output terminal for a signal of the second frequency;
A third inductive iris provided on an inner wall of the second rectangular waveguide, the resonant frequency and the size of which are adjusted to pass the second frequency as a center frequency, and the second rectangular waveguide; A distance from a connection position of the first and second waveguides of the common waveguide is one half of a guide wavelength of the common waveguide with respect to the second frequency. there are, those which are composed of a first fourth inductive iris coupled to the second side wall opposite the side wall.

[0014] waveguide demultiplexer according to claim 6 of the present invention includes a common waveguide rectangular waveguide tube, groups of the common waveguide
First side wall parallel to electric field of TE ₁₀ mode which is this mode
A first waveguide filter of a first frequency connected to
Field of TE ₁₀ mode which is a fundamental mode of said common waveguide
And a second frequency different from the first frequency provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween. And a waveguide filter for a signal of a third frequency different from the first and second frequencies,
A first impedance transformer for converting the common waveguide into a waveguide having a width through which the first and second frequencies are cut off and the third frequency passes; the first and second frequencies; Has a width such that the third frequency passes when cut-off occurs.
And a second waveguide, a fourth inductive iris sandwiched and connected between the first and second waveguides, and a waveguide of the present waveguide filter connected to the second waveguide. 2nd to convert to pipe width
A third waveguide filter connected via an impedance transformer, wherein the common waveguide includes a rectangular waveguide portion and an input / output terminal connected to an antenna,
The first waveguide filter includes a first rectangular waveguide, a first input / output terminal for a signal of the first frequency, and a first input / output terminal.
A first inductive iris provided on the inner wall of the rectangular waveguide of which the resonance frequency and the size are adjusted so as to pass the first frequency as a center frequency, and the rectangular waveguide of the common waveguide. first coupling the distance from the connecting position of the pipe section and the first impedance transformer is coupled to said first side wall of one half the guide wavelength of the common waveguide for said first frequency Wherein the second waveguide filter comprises a second rectangular waveguide, a second input / output terminal for a signal of the second frequency, and a second rectangular waveguide. A second inductive iris provided on an inner wall, the resonance frequency and the size of which are adjusted to pass the second frequency as a center frequency, and the rectangular waveguide portion of the common waveguide; The distance from the connection position of the first impedance transformer to the second impedance transformer is A one-half the guide wavelength of the common waveguide for frequency, is composed of a second coupling hole coupled to the <br/> second sidewall opposite the first sidewall ,
The third waveguide filter includes a third rectangular waveguide, a third input / output terminal for the signal of the third frequency, and the third waveguide.
Of provided on the inner wall of the rectangular waveguide, the third and the third inductive iris resonant frequency and magnitude to pass as the center frequency is adjusted to frequency, the second Inpi
A third coupled to the common waveguide via a dance transformer
And the coupling hole of the above.

According to a seventh aspect of the present invention, there is provided a waveguide duplexer comprising: a rectangular waveguide common waveguide; and a base of the common waveguide.
First side wall parallel to electric field of TE ₁₀ mode which is this mode
A first waveguide filter of a first frequency connected to
Field of TE ₁₀ mode which is a fundamental mode of said common waveguide
And a second frequency different from the first frequency provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween. And a waveguide filter for a signal of a third frequency different from the first and second frequencies,
A first impedance transformer for converting the common waveguide into a waveguide having a width through which the first and second frequencies are cut off and the third frequency passes; the first and second frequencies; Has a width such that the third frequency passes when cut-off occurs.
And a second waveguide, a seventh inductive iris connected and connected between the first and second waveguides, and a waveguide of the present waveguide filter connected to the second waveguide. Second to convert to tube width
A third waveguide filter connected via an impedance transformer, wherein the common waveguide includes a rectangular waveguide portion and an input / output terminal connected to an antenna,
The first waveguide filter is provided on a first rectangular waveguide, an input / output terminal for a signal of the first frequency, and an inner wall of the first rectangular waveguide, and A first inductive iris whose resonance frequency and size are adjusted to pass a frequency as a center frequency, and a rectangular waveguide of the common waveguide provided on an inner wall of the first rectangular waveguide. second inductive which parts and the distance from the connection position of the first impedance transformer is coupled to said first side wall of one half the guide wavelength of the common waveguide for said first frequency An iris, wherein the second waveguide filter has a second rectangular waveguide, a second input / output terminal for a signal of the second frequency, and a second rectangular waveguide. The resonance frequency and the high frequency are provided on the inner wall so that the second frequency passes with the second frequency as the center frequency. A third inductive iris having an adjusted impedance, and a connection position between the rectangular waveguide portion of the common waveguide and the first impedance transformer, which is provided on an inner wall of the second rectangular waveguide. distance from is 1-half of the guide wavelength of the common waveguide for said second frequency, a fourth inductive coupled to the second side wall opposite the first side wall An iris, wherein the third waveguide filter includes a third rectangular waveguide, a third input / output terminal for a signal of the third frequency, and a third rectangular waveguide. A fifth inductive iris provided on an inner wall and having a resonance frequency and a size adjusted to pass the third frequency as a center frequency, and a fifth inductive iris provided on an inner wall of the third rectangular waveguide; And a sixth inductive iris coupled to the second impedance transformer. It is those who are.

According to a eighth aspect of the present invention, there is provided a waveguide duplexer, comprising: a rectangular waveguide common waveguide; and a base of the common waveguide.
First side wall parallel to electric field of TE ₁₀ mode which is this mode
A first waveguide filter connected to the common waveguide
The fundamental mode is TE ₁₀ mode second parallel to the electric field of the
Is connected to the side wall, which is the common waveguide and across said first waveguide filter and the second waveguide filter provided in substantially opposite positions, the fundamental mode of the common waveguide T
Is connected to the second side wall parallel to the electric field E ₁₀ mode, wherein a third waveguide filter provided on the same side as the second waveguide filter, the common waveguide, antenna , And a short-circuited end provided at a tip opposite to the input / output terminal. The first waveguide filter includes a first rectangular waveguide, a first frequency And a first inductive iris provided on the inner wall of the first rectangular waveguide and having a resonance frequency and a magnitude adjusted to pass through the first frequency as a center frequency. The distance from the short-circuit end of the common waveguide is one-fourth of the guide wavelength of the common waveguide with respect to the first frequency.
And a first coupling hole coupled to the first side wall, wherein the second waveguide filter has a second rectangular waveguide and a second rectangular filter having a second frequency different from the first frequency. A second input / output terminal for a signal, and a second inductive terminal provided on an inner wall of the second rectangular waveguide and having a resonance frequency and a magnitude adjusted to pass the second frequency as a center frequency. The distance between the iris and the short-circuit end of the common waveguide is the second distance.
周波 数 of the guide wavelength of the common waveguide with respect to the frequency of
A is said is composed of a second coupling hole coupled to the second side wall opposite the first side wall, said third waveguide filter includes a third rectangular waveguide A third input / output terminal for a signal having a third frequency different from the first and second frequencies, and a third input / output terminal provided on an inner wall of the third rectangular waveguide and passing the third frequency as a center frequency. A third inductive iris whose resonance frequency and size are adjusted so that the distance from the short-circuit end of the common waveguide is three quarters of the guide wavelength of the common waveguide with respect to the third frequency. The second of
And a third coupling hole coupled to a side wall of the common waveguide, the first side wall of the common waveguide being located at a position opposed to the third coupling hole from the inner wall of the common waveguide. In this case, an inductive convex portion is provided.

According to a ninth aspect of the present invention, in the waveguide duplexer, the common waveguide is provided at a position on the first side wall of the common waveguide opposite to the sixth inductive iris. The projection has an inductive projection as viewed from the inner wall of the wave tube.

The waveguide demultiplexer according to claim 10 of the present invention, in the first side wall of said common waveguide, in a position facing the third coupling holes, said inductive In place of the convex portion, a capacitive concave portion is provided as viewed from the inner wall of the common waveguide.

The waveguide splitter according to an eleventh aspect of the present invention is the waveguide splitter, wherein the first side wall of the common waveguide is located at a position facing the sixth inductive iris. Instead of the convex portion, a capacitive concave portion is provided when viewed from the inner wall of the common waveguide.

According to a twelfth aspect of the present invention, in the waveguide duplexer, the third waveguide filter includes the sixth inductive antenna.
Consists of an asymmetric inductive iris instead of an iris
Is what it is.

[0021]

[0022]

[0023]

[0024]

In the waveguide duplexer according to the first aspect of the present invention, since the waveguide filter is connected to the common waveguide using an inductive iris, discontinuity in the common waveguide is reduced. It is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, and the power resistance is excellent.

In the waveguide duplexer according to the second and third aspects of the present invention, the guide wavelength at the center frequency of each waveguide filter from the position where the two waveguide filters are regarded as the short-circuited end or the open end. Therefore, good characteristics can be obtained over a wide frequency band. Further, since the discontinuity in the common waveguide is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, and the power durability is excellent.

In the waveguide duplexer according to a fourth aspect of the present invention, the common waveguide is regarded as a short-circuited end or an open end.
A step in the width direction is provided at the position, and the step
The width is set at the frequency where you want the open end at the position of the step.
In other words, it becomes the cutoff frequency, and the higher frequency
Now select the width that will be the passband, and then create a uniform waveguide
Connect, and if necessary, repeat steps
Connection of waveguide filters
The degree of freedom can be given to the position,
Good in a wide frequency band without any restrictions on structure and bandwidth
Properties can be obtained .

In the waveguide duplexer according to the fifth aspect of the present invention, a step in the width direction is provided at a portion of the common waveguide which is regarded as a short-circuited end or an open end, and the width of the step is determined by the width of the step. At the frequency where you want to make the open end at a certain position, it will be the cutoff frequency, and at higher frequencies, the width that will be the passband, then connect a uniform waveguide, and if necessary, go to the above step The structure with several steps similar to that described above allows flexibility in the connection position of the waveguide filter, and has good characteristics over a wide band without being limited by the structure and band of the waveguide filter. Can be obtained. Further, since the discontinuity in the common waveguide is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, and the power durability is excellent.

In the waveguide duplexer according to claim 6 of the present invention, the common waveguide is regarded as a short-circuited end or an open end.
Provide a width-direction impedance transformer at the position
The width of the transformer at the position
It becomes the cutoff frequency, at higher frequencies
Select the width that will be the passband, and then connect a uniform waveguide
And, if necessary, an inductive or
Provide a capacitive iris and, if necessary,
Connect the dance transformer and then not yet connected
Each waveguide filter is connected by the structure to connect the waveguide filter.
The connection position of the
Of the guide wavelength at the center frequency of each frequency band
At a quarter or half location, or directly
At a position, it is connected to the waveguide, so in a wide frequency band
Good characteristics can be obtained .

In the waveguide duplexer according to claim 7 of the present invention, the common waveguide is regarded as a short-circuited end or an open end.
Provide a width-direction impedance transformer at the position
The width of the transformer at the position
It becomes the cutoff frequency, at higher frequencies
Select the width that will be the passband, and then connect a uniform waveguide
And, if necessary, an inductive or
Provide a capacitive iris and, if necessary,
Connect the dance transformer and then not yet connected
Each waveguide filter is connected by the structure to connect the waveguide filter.
The connection position of the
Of the guide wavelength at the center frequency of each frequency band
At a quarter or half location, or directly
At a position, it is connected to the waveguide, so in a wide frequency band
Good characteristics can be obtained . In addition, since the discontinuity in the waveguide is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, and the power durability is excellent.

In the waveguide duplexer according to the eighth aspect of the present invention, the two waveguide filters are short-circuited or open.
From the position regarded as the edge to the center frequency of each filter
At one-quarter or one-half of the guide wavelength
Can be connected, other of the waveguide filters
Connection of waveguide filters to some waveguide filters
Asymmetric inductive air on the side wall opposite the connected side wall
The projections that make up the
Good characteristics can be obtained over a certain position
Short-circuited end of connected filter
Or the capacitance of the filter at the position
Mitigate the effects with irises on opposing sidewalls
Performance improvement in a wider frequency band.
Will be possible .

In the waveguide duplexer according to the ninth aspect of the present invention, the waveguide filter is regarded as a short-circuited end or an open end.
Of the guide wavelength at each center frequency from the position
Inductive iris at quarter or half position
Can be connected using a connected waveguide filter
An asymmetric inductive iris on the side wall opposite the side wall
Is provided, so that it covers a wide frequency band.
To obtain good characteristics, and
Shorter for a given waveguide filter
Waveguide fill on the side considered to be the entangled or open end
Asymmetric induction on the opposing sidewalls
Frequency can be reduced by the
Characteristics can be improved in several bands. Also in the waveguide
Is discontinuous in the direction perpendicular to the magnetic field,
Eliminates the area where the electric field concentrates and has excellent power durability
You .

In the waveguide duplexer according to a tenth aspect of the present invention, the two waveguide filters are connected to the short-circuited end or the open end.
Center frequency of each filter from the position regarded as the emission end
Position of 1/4 or 1/2 of the guide wavelength at
Can be connected to other waveguide filters.
For some waveguide filters
A recess is provided on the side wall opposite to the connected side wall
To obtain good characteristics over a wide frequency band
To the filter connected to a certain position.
Closer to the position considered as short-circuit end or open end than the filter of
Inductive effects of a filter are provided on opposing side walls
Wider frequency that can be reduced by iris
It is possible to improve characteristics in a band .

[0033] In the waveguide duplexer according to claim 11 of the present invention, the waveguide filter is connected to a short-circuited end or an open-ended end.
Center frequency of each waveguide filter from the considered position
Position of 1/4 or 1/2 of the guide wavelength at
Can be connected to the waveguide using an inductive iris
Make a recess in the side wall opposite to the side wall where the filter is connected
Good characteristics over a wide frequency band
And a waveguide fiber connected at a certain position can be obtained.
Filter to the short-circuit end or
Inductivity of the waveguide filter at the position considered as open end
Mitigate the effects with irises on opposing sidewalls
Performance improvement in a wider frequency band.
Will be possible. If the discontinuity in the waveguide is perpendicular to the magnetic field,
Direction is uniform, so there is no portion where the electric field concentrates
And has excellent power durability .

In the waveguide duplexer according to the twelfth aspect of the present invention, the waveguide duplexer is connected to the common waveguide using an inductive iris.
One or both of two adjacent waveguide filters
Because the above-mentioned inductive iris has an asymmetric structure,
Each waveguide from the position considered as entangled end or open end
Do not change the distance of the filter to the center of the iris.
In addition, it is possible to increase the distance between waveguide filters.
It is possible to arrange waveguide filters close to each other.
There is .

[0035]

[0036]

[0037]

[0038]

【Example】

Embodiment 1 FIG. The configuration of Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a perspective view showing Embodiment 1 of the present invention. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 1, 1 is a common waveguide, 2 is a waveguide filter having a pass frequency f1, 3 is an inductive iris,
Reference numeral 5 denotes an inductive iris that also serves to couple the common waveguide 1 and the waveguide filter 2. Reference numeral 6 denotes a rectangular waveguide. The waveguide filter 2 is a rectangular waveguide 6,
It consists of inductive irises 3,5. Further, the tip of the common waveguide 1 is short-circuited by the short-circuit end 4. 7
Is an input / output terminal connected to the antenna, and 8 is an input / output terminal for a signal of frequency f1.

Next, the operation of the first embodiment will be described. The resonance frequency and the size of the inductive iris 3 are adjusted so that the waveguide filter 2 passes with the frequency f1 as the center frequency. 1, the waveguide filter 2 does not resonate with respect to the incident wave other than the frequency f1 from the common waveguide 1, but is reflected. When the distance from the filter is one quarter of the guide wavelength λg1, the magnetic field in the width direction of the inductive iris 5 becomes maximum, and is efficiently divided into the waveguide filter 2 via the inductive iris 5 provided at that position. Waved.

In the waveguide duplexer configured as described above, since the common waveguide 1 and the waveguide filter 2 are connected using the inductive iris 5, the inside of the common waveguide 1 is reduced. Becomes uniform in the direction perpendicular to the magnetic field, and there is no portion where the electric field concentrates, so that a duplexer excellent in power durability can be obtained. Further, the number of waveguide filters may be two or more.

Embodiment 2 FIG. The configuration of the second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a perspective view showing Embodiment 2 of the present invention.

In FIG. 2, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 4 is a short-circuited end, and 5 is a common waveguide 1 and a waveguide. Inductive iris for coupling the filter 2, 10 for inductive iris for coupling the common waveguide 1 and the waveguide filter 9, 7 for an input / output terminal connected to an antenna, 8 for an input / output terminal for a signal of frequency f 1, 11 Is an input / output terminal for a signal of frequency f2.

In the waveguide duplexer constructed as described above, both of the inductive irises 5 and 10 are separated from the short-circuit end 4 by ４ of λg1 and １ of λg2. The strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 changes gradually with respect to the frequency, and accordingly, the common waveguide 1 and the waveguide filters 2 and 9 change accordingly. Also changes slowly with the change in frequency (where
λg1 and λg2 are guide wavelengths corresponding to the frequencies f1 and f2).

Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the iris. In this case, the characteristics of the waveguide filters 2 and 9 with respect to the frequency are good over a wide band. It becomes something. Further, since the discontinuity in the common waveguide 1 is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field is concentrated, and a duplexer having excellent power durability can be obtained. The number of waveguide filters may be three or more, and in the case of three, a configuration in which a waveguide filter having a narrow band is connected to a side wall of a quarter of the guide wavelength λg3 is considered.

Embodiment 3 FIG. The configuration of the third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a perspective view showing Embodiment 3 of the present invention.

In FIG. 3, 1 is a common waveguide, 2 is a waveguide filter having a frequency f1, 9 is a waveguide filter having a frequency f2, and 12 is a waveguide having a frequency f3 and a narrowest waveguide among three bandwidths. A tube filter, 4 is a short-circuited end, 5 is an inductive iris for coupling the common waveguide 1 and the waveguide filter 2, 10 is an inductive iris for coupling the common waveguide 1 and the waveguide filter 9, and 13 is an inductive iris. An inductive iris for coupling the common waveguide 1 and the waveguide filter 12; 7 is an input / output terminal connected to the antenna; 8 is an input / output terminal for a signal of frequency f1; 11 is an input / output terminal of a signal of frequency f2; Is an input / output terminal for a signal of frequency f3.

In the waveguide duplexer constructed as described above, both of the inductive irises 5 and 10 are separated from the short-circuit end 4 by a quarter of λg1 and a quarter of λg2. The strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 changes gradually with respect to the frequency, and accordingly, the common waveguide 1 and the waveguide filters 2 and 9 change accordingly. Also changes gradually with the change in frequency (where
λg1 and λg2 are guide wavelengths corresponding to f1 and f2). Therefore, it can be designed on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the iris. In this case, the characteristics of the filter with respect to the frequency are good over a wide band.

The waveguide filter 12 is connected from the short-circuited end 4 to a side wall at a position of three quarters of the guide wavelength λg3. The influence on the waveguide filters 9 and 12 can be reduced by making the waveguide width of the waveguide filter 2 wide enough to prevent a higher-order mode from occurring in the band. This is because the cutoff frequency of the waveguide filters 9 and 12 and the cutoff frequency of the waveguide filter 2 are different. In this case, the frequency f
A higher-order mode may occur in the waveguide filter 2 at 2 and f3. Further, the number of waveguide filters may be four or more. For a waveguide filter having a low pass frequency band, the width is made wide enough to prevent generation of a higher-order mode in that band. Further, the magnitude relationship between the position of the waveguide filter and the respective bandwidths and center frequencies does not necessarily have to be such.

Embodiment 4 FIG. The configuration of Embodiment 4 of the present invention will be described with reference to FIG. FIG. 4 is a perspective view showing Embodiment 4 of the present invention.

In FIG. 4, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 4 is a short-circuited end, and 15 is provided on a side wall of the common waveguide 1. (The thickness of the side wall and the like is omitted in the drawing. The same applies to the following.), A coupling hole for coupling the common waveguide 1 and the waveguide filter 2, and 16 is a side wall of the common waveguide 1 A coupling hole for coupling the common waveguide 1 and the waveguide filter 9;
Is an input / output terminal connected to the antenna, 8 is an input / output terminal for a signal at frequency f1, 11 is an input / output terminal for a signal at frequency f2, 17 is a waveguide having a width that cuts off frequency f1 and passes frequency f2, 18 Is a waveguide having a width at which the frequencies f1 and f2 are cut off.

In the waveguide duplexer configured as described above, the connection position between the common waveguide 1 and the waveguide 17 appears at the open end at the frequency f1, and the coupling hole 15 is connected to the common waveguide 1.
Is separated from the connection position of the waveguide 17 by one half of λg1, and the strength of the magnetic field at the connection position of the common waveguide 1 and each of the waveguide filters 2 and 9 is moderate with respect to the frequency. Change.

[0053] connection position of the waveguide 17 and waveguide 18 are visible to the open end at the frequency f2, the coupling hole 16 waveguide 17
Λg2 is separated from the connection position of the common waveguide 1 and each of the waveguide filters 2 and 9 by a half of λg2. Change. Accordingly, the common waveguide 1 and the waveguide filters 2, 9
Also changes gradually with the change in frequency (where λg1 and λg2 are the guide wavelengths corresponding to f1 and f2).

Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the coupling holes 15 and 16. In this case, the characteristics of the waveguide filter with respect to the frequency are over a wide band. It will be good. Further, when the guide wavelengths λg1 and λg2 are close to each other, the above structure makes it possible to shift the positions of the coupling holes 15 and 16 to each other, thereby reducing the coupling between the waveguide filters and facilitating the design. . The number of waveguide filters may be three or more. Further, the magnitude relationship between the position of the waveguide filter and the respective bandwidths and center frequencies does not necessarily have to be such.

Embodiment 5 FIG. The configuration of Embodiment 5 of the present invention will be described with reference to FIG. FIG. 5 is a perspective view showing Embodiment 5 of the present invention.

In FIG. 5, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 4 is a short-circuited end, 5 is a common waveguide 1 and a waveguide. Inductive iris for coupling the filter 2, 10 for inductive iris for coupling the common waveguide 1 and the waveguide filter 9, 7 for an input / output terminal connected to an antenna, 8 for an input / output terminal for a signal of frequency f 1, 11 Are input / output terminals of a signal of frequency f2, and 1
Reference numeral 7 denotes a waveguide having a width at which the frequency f1 is cut off and the frequency f2 passes therethrough, and reference numeral 18 denotes a waveguide having a width at which the frequencies f1 and f2 are cut off.

In the waveguide duplexer configured as described above, the connection position between the common waveguide 1 and the waveguide 17 appears at the open end at the frequency f1, and the inductive iris 5 is connected to the common waveguide. 1 is separated from the connection position of the waveguide 17 by a half of λg1, and the common waveguide 1 and each of the waveguide filters 2, 9
The magnetic field strength at the connection position changes slowly with frequency.

The connection position between the common waveguide 1 and the waveguide 18 looks like an open end at the frequency f2, and the inductive iris 10 is １ of λg2 from the connection position between the common waveguide 1 and the waveguide 18. And the strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 changes gradually with the frequency. Accordingly, the coupling amount between the common waveguide 1 and the waveguide filters 2 and 9 also changes gradually with respect to the change in frequency (where λg1 and λg2 are the guide wavelengths corresponding to f1 and f2).

Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the inductive irises 5 and 10. In this case, the characteristic of the waveguide filter with respect to the frequency is wide. Good over In addition, when the guide wavelengths λg1 and λg2 are close to each other, the above-described structure allows the inductive irises 5, 1 to be connected to each other.
The position of 0 can be shifted, the coupling between the waveguide filters is reduced, and the design becomes easy. Further, since the discontinuity in the common waveguide 1 is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field is concentrated, and a duplexer having excellent power durability can be obtained. The number of waveguide filters may be three or more. Further, the magnitude relationship between the position of the waveguide filter and the respective bandwidths and center frequencies does not necessarily have to be such.

Embodiment 6 FIG. The configuration of the sixth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a perspective view showing Embodiment 6 of the present invention.

In FIG. 6, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 12 is a waveguide filter of frequency f3, and 15 is a common waveguide. Coupling holes for coupling 1 to the waveguide filter 2, 16
Is a coupling hole for coupling the common waveguide 1 and the waveguide filter 9, 19 is a coupling hole for coupling the common waveguide 1 and the waveguide filter 12, 7 is an input / output terminal connected to the antenna, and 8 is a frequency f1. 11 is an input / output terminal for a signal of frequency f2, and 14 is an input / output terminal for a signal of frequency f3.

In FIG. 6, reference numeral 20 denotes an impedance transformer for converting a frequency f1 and f2 into a waveguide having a cut-off frequency and a frequency f3 passing therethrough. The waveguide of the transformer also has frequencies f1 and f2. Has a width that can be cut off. Reference numeral 21 denotes a waveguide having a width such that the frequencies f1 and f2 are cut off and the frequency f3 passes, 22 denotes an inductive iris, and 23 denotes an impedance transformer for converting the waveguide filter 12 into a waveguide width.

In the waveguide duplexer configured as described above, the connection position between the common waveguide 1 and the impedance transformer 20 appears at the open end at the frequencies f1 and f2, and the coupling holes 15 and 16 are shared. Waveguide 1 and impedance transformer 2
From the connection position of 0, one half of λg1 and one half of λg2
And the common waveguide 1 and each waveguide filter 2,
The strength of the magnetic field at the connection position 9 changes gradually with frequency. Accordingly, the coupling amount between the common waveguide 1 and the waveguide filters 2 and 9 also changes gradually with respect to the change in frequency (where λg1 and λg2 are the guide wavelengths corresponding to f1 and f2).

Therefore, the design can be performed on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the coupling holes 15 and 16. In this case, the characteristic of the waveguide filter with respect to the frequency is wide over a wide band. It will be good. Further, since the waveguide filter 12 is connected through the impedance transformer 23, the waveguide filter 12 is not affected by the waveguide 21. Further, the influence of the waveguide filter 2 and the waveguide filter 9 on the frequency f3 can be canceled by the inductive iris 22 provided in the waveguide 21. In some cases, the above-described effect can be canceled by using a capacitive iris instead of the inductive iris 22. When the guide wavelengths λg1 and λg2 are close to each other, the position of the coupling holes 15 and 16 is shifted by selecting the waveguide width of the impedance transformer 20 so that the frequency f1 is cut off and the frequency f2 passes. Is possible, the coupling between the waveguide filters is reduced, and the design is facilitated. The number of waveguide filters may be four or more.

Embodiment 7 FIG. The configuration of a seventh embodiment of the present invention will be described with reference to FIG. FIG. 7 is a perspective view showing Embodiment 7 of the present invention.

In FIG. 7, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 12 is a waveguide filter of frequency f3, and 5 is a common waveguide. Inductive iris 1 couples waveguide filter 2 with inductive iris 10 couples common waveguide 1 and waveguide filter 9, 13 couples common waveguide 1 and waveguide filter 12. An inductive iris, 7 is an input / output terminal connected to the antenna, 8 is an input / output terminal for a signal at frequency f1, 11 is an input / output terminal for a signal at frequency f2, and 14 is an input / output terminal for a signal at frequency f3.

In FIG. 7, reference numeral 20 denotes an impedance transformer for converting a waveguide having a width through which the frequencies f1 and f2 are cut off and the frequency f3 passes. It has a width that can be cut off. 21 is the frequency f1
, F2 is cut off and the frequency f3 is passed through, a waveguide 22 has an inductive iris, and 23 has a waveguide filter 12.
This is an impedance transformer for converting the width of the waveguide into a width.

In the waveguide duplexer configured as described above, the connection position between the common waveguide 1 and the impedance transformer 20 appears at the open end at the frequencies f1 and f2, and the inductive irises 5 and 10 are From the connection position between the common waveguide 1 and the impedance transformer 20, one half of λg1 and two of λg2
The strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 changes gradually with respect to the frequency. Accordingly, the coupling amount between the common waveguide 1 and the waveguide filters 2 and 9 also changes gradually with respect to the change in frequency (where λg1 and λg2 are the guide wavelengths corresponding to f1 and f2).

Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the inductive irises 5 and 10. In this case, the characteristic of the waveguide filter with respect to the frequency is wide. Good over Further, since the waveguide filter 12 is connected through the impedance transformer 23, the waveguide
Is not affected. Further, the influence of the waveguide filter 2 and the waveguide filter 9 on the frequency f3 can be canceled by the inductive iris 22 provided in the waveguide 21. In some cases, by providing a capacitive iris instead of the inductive iris 22, the above-described effect can be canceled. When the guide wavelengths λg1 and λg2 are close to each other, the waveguide width of the impedance transformer 20 is changed to the frequency f.
By selecting 1 so that the frequency f2 passes while blocking, the positions of the inductive irises 5 and 10 can be shifted from each other, the coupling between the waveguide filters is reduced, and the design becomes easy. Further, since the discontinuity in the common waveguide 1 is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field is concentrated, and a duplexer having excellent power durability can be obtained. The number of waveguide filters may be four or more.

Embodiment 8 FIG. The configuration of Embodiment 8 of the present invention will be described with reference to FIG. FIG. 8 is a perspective view showing Embodiment 8 of the present invention.

In FIG. 8, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 12 is a waveguide filter of frequency f3, and 24 is a waveguide filter of frequency f4. Waveguide filter, 25 is a waveguide filter of frequency f5, 15 is a coupling hole for coupling the common waveguide 1 and the waveguide filter 2, 16 is the common waveguide 1 and the waveguide filter 9
Is a coupling hole for coupling the waveguide 30 and the waveguide filter 12.

In FIG. 8, 26 is a coupling hole for coupling the waveguide 30 and the waveguide filter 24, 27 is a coupling hole for coupling the impedance transformer 34 and the waveguide filter 25, and 7 is connected to the antenna. 8 is an input / output terminal of a signal of frequency f1, 11 is an input / output terminal of a signal of frequency f2, 14 is an input / output terminal of a signal of frequency f3, 2
8 is an input / output terminal for a signal of frequency f4, 29 is a frequency f5
The input / output terminal 20 of this signal is an impedance transformer for converting into a waveguide having a width that cuts off the frequencies f1 and f2 and allows the frequencies f3, f4 and f5 to pass. And f2 have a width that can be cut off. Reference numeral 21 denotes a waveguide having a width such that frequencies f1 and f2 are cut off and frequencies f3, f4, and f5 pass, and reference numeral 22 denotes an inductive iris.

Further, in FIG. 8, 30 is the frequency f3
23 is an impedance transformer that converts the width of the waveguide 30 into a waveguide, and 31 is a waveguide that has a width through which the frequencies f3 and f4 are cut off and the frequency f5 passes. An impedance transformer to be transformed, and the waveguide of the transformer also has a width at which the frequencies f3 and f4 are cut off. 3
Reference numeral 2 denotes a waveguide having a width such that the frequencies f3 and f4 are cut off and the frequency f5 passes therethrough; 33, an inductive iris; and 34, an impedance transformer for converting the waveguide filter 25 into a waveguide width.

In the waveguide duplexer configured as described above, the connection position between the common waveguide 1 and the impedance transformer 20 appears at the open end at the frequencies f1 and f2, and the coupling holes 15 and 16 are shared. Waveguide 1 and impedance transformer 2
From the connection position of 0, one half of λg1 and one half of λg2
And the common waveguide 1 and each waveguide filter 2,
The strength of the magnetic field at the connection position 9 changes gradually with frequency. Accordingly, the coupling amount between the common waveguide 1 and the waveguide filters 2 and 9 also changes gradually with respect to the change in frequency (where λg1 and λg2 are the guide wavelengths corresponding to f1 and f2). Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the coupling holes 15 and 16. In this case, the characteristics of the waveguide filter with respect to the frequency are good over a wide band. Becomes

Since the connection position between the waveguide 30 and the impedance transformer 31 appears at the open end at the frequencies f3 and f4, the coupling holes 19 and 26 are two minutes of λg3 from the connection position between the waveguide 30 and the impedance transformer 31. 1, λg4 2
The strength of the magnetic field at the connection position between the waveguide 30 and each of the waveguide filters 12 and 24 changes gradually with respect to the frequency. Accordingly, the coupling amount between the waveguide 30 and the waveguide filters 12 and 24 also changes gradually with respect to the frequency (where λg3 and λg4 are the frequencies f3,
f4). Therefore, the design can be made assuming that the change of the coupling amount with the outside with respect to the frequency depends only on the shape of the coupling holes 19 and 26. In this case, the characteristics of the waveguide filter with respect to the frequency are good over a wide band. Becomes

Waveguide filters 12 and 24
The effects at frequencies f3 and f4 can be canceled by the inductive iris 22 provided in the waveguide 21.
Further, in some cases, the above-described effect can be canceled by using a capacitive iris. Further, since the waveguide filter 25 is connected through the impedance transformer 34, the waveguide filter 25 is not affected by the waveguide 21, the waveguide 30, and the waveguide 32.

The effect of the waveguide filter 2, the waveguide filter 9, the waveguide filter 12, and the waveguide filter 24 on the frequency f 5 is due to the inductive iris 3 provided in the waveguide 32.
3 can be canceled. Further, in some cases, the above-described effect can be canceled by using a capacitive iris.

When the guide wavelengths λg1 and λg2 are close to each other, the waveguide width of the impedance transformer 20 is changed to the frequency f1.
Is selected so that the frequency f2 passes through the cutoff, the positions of the coupling holes 15 and 16 can be shifted from each other, the coupling between the waveguide filters is reduced, and the design becomes easy.

Further, when the guide wavelengths λg3 and λg4 are close, the waveguide width of the impedance transformer 31 is changed to the frequency f.
By selecting 3 so that the frequency f4 passes while blocking, the positions of the coupling holes 19 and 26 can be shifted from each other, the coupling between the waveguide filters is reduced, and the design is facilitated. The number of waveguide filters may be six or more.

Embodiment 9 FIG. The configuration of a ninth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a perspective view showing Embodiment 9 of the present invention.

In FIG. 9, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 12 is a waveguide filter of frequency f3, and 24 is a waveguide filter of frequency f4. Waveguide filter, 25 is a waveguide filter of frequency f5, 5 is an inductive iris that couples the common waveguide 1 and the waveguide filter 2, and 10 is a coupling between the common waveguide 1 and the waveguide filter 9. Inductive iris, 13 is waveguide 30
Inductive iris for coupling the filter with the waveguide filter 12;
5 is an inductive iris for coupling the waveguide 30 and the waveguide filter 24, 36 is an inductive iris for coupling the impedance transformer 34 and the waveguide filter 25, 7 is an input / output terminal connected to the antenna, and 8 is a frequency. f1 signal input / output terminal, 11 a frequency f2 signal input / output terminal, 14 a frequency f3 signal input / output terminal, 28 a frequency f4 signal input / output terminal, 29 a frequency f5 signal input / output Terminal.

In FIG. 9, reference numeral 20 denotes an impedance transformer for converting a waveguide into a waveguide having a width through which the frequencies f1 and f2 are cut off and the frequencies f3, f4 and f5 pass, and the waveguide of the transformer is also used. The frequency f1 and f2 have such a width that they can be cut off. Reference numeral 21 denotes frequencies f1 and f2 cut off and frequencies f3 and f4
A waveguide having a width through which f3, f5 and f5 pass, 22 an inductive iris, 30 a waveguide having a width through which f3, f4 and f5 pass, and 23 an impedance transformer for converting into a width of the waveguide 30 , 31 are impedance transformers for converting into a waveguide having a width through which the frequencies f3 and f4 are cut off and the frequency f5 passes. The waveguide of the transformer also has a width at which the frequencies f3 and f4 are cut off. Reference numeral 32 denotes a waveguide having a width such that the frequencies f3 and f4 are cut off and the frequency f5 passes therethrough, 33 denotes an inductive iris, and 34 denotes an impedance transformer for converting the waveguide filter 25 into a waveguide width.

In the waveguide duplexer configured as described above, the connection position between the common waveguide 1 and the impedance transformer 20 appears at the open end at the frequencies f1 and f2, and the inductive irises 5 and 10 are From the connection position between the common waveguide 1 and the impedance transformer 20, one half of λg1 and two of λg2
The strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 changes gradually with respect to the frequency. Accordingly, the coupling amount between the common waveguide 1 and the waveguide filters 2 and 9 also changes gradually with respect to the change in frequency (where λg1 and λg2 are the frequencies f1 and f2).
). Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the inductive irises 5 and 10. In this case, the characteristics of the waveguide filter with respect to the frequency are good over a wide band. It will be.

The connection position between the waveguide 30 and the impedance transformer 31 appears at the open end at the frequencies f3 and f4, and the inductive irises 13 and 35 are two minutes of λg3 from the connection position between the waveguide 30 and the impedance transformer 31. And λg4, and the strength of the magnetic field at the connection position between the waveguide 30 and each of the waveguide filters 12 and 24 gradually changes with frequency. Accordingly, the coupling amount between the waveguide 30 and the waveguide filters 12 and 24 also changes gradually with respect to the change in the frequency (where λg3 and λg4 are f3 and f4, respectively).
). Therefore, it can be designed on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the inductive irises 13 and 35. In this case, the characteristic of the waveguide filter with respect to the frequency is good over a wide band. It will be.

Waveguide Filter 12, Waveguide Filter 24
The effects at frequencies f3 and f4 can be canceled by the inductive iris 22 provided in the waveguide 21.
Further, in some cases, by providing a capacitive iris, the above-described effect can be canceled. Further, since the waveguide filter 25 is connected through the impedance transformer 34, the waveguide filter 25 is not affected by the waveguide 21, the waveguide 30, and the waveguide 32.

The effect of the waveguide filter 2, the waveguide filter 9, the waveguide 12, and the waveguide filter 24 on the frequency f5 can be canceled by the inductive iris 33 provided in the waveguide 32. Further, in some cases, the above-described effect can be canceled by using a capacitive iris.

When the guide wavelengths λg1 and λg2 are close to each other, the waveguide width of the impedance transformer 20 is changed to the frequency f1.
Is selected so that the frequency f2 passes with the cutoff, the positions of the inductive irises 5 and 10 can be shifted from each other, the coupling between the waveguide filters is reduced, and the design is facilitated.

Further, when the guide wavelengths λg3 and λg4 are close, the waveguide width of the impedance transformer 31 is changed to the frequency f.
By selecting so that the frequency f4 passes while the filter 3 is cut off, the positions of the inductive irises 13 and 35 can be shifted from each other, the coupling between the waveguide filters is reduced, and the design is facilitated. The number of waveguide filters may be six or more.

Embodiment 10 FIG. The configuration of Embodiment 10 of the present invention will be described with reference to FIG. FIG. 10 is a perspective view showing Embodiment 10 of the present invention.

In FIG. 10, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 12 is a waveguide filter of frequency f3, 4 is a short-circuited end, Is a coupling hole for coupling the common waveguide 1 and the waveguide filter 2, 16 is a coupling hole for coupling the common waveguide 1 and the waveguide filter 9, and 19 is a coupling hole for coupling the common waveguide 1 and the waveguide filter 12. , 37 is an inductive protrusion provided on the side wall just opposite the coupling hole 19 of the waveguide filter 12, 7 is an input / output terminal connected to the antenna, and 8 is a frequency f.
Reference numeral 11 denotes an input / output terminal for a signal of frequency f2, and reference numeral 14 denotes an input / output terminal for a signal of frequency f3.

In the waveguide duplexer configured as described above, both of the coupling holes 15 and 16 are connected from the short-circuited end 4 to λg
1/4 and 1/4 of λg2,
The strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 changes gradually with respect to the frequency. The coupling amount also changes slowly with respect to the frequency (here, λg
1, λg2 is a guide wavelength corresponding to the frequencies f1 and f2). Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the coupling holes 15 and 16. In this case, the characteristics of the waveguide filter with respect to the frequency are good over a wide band. Becomes

The waveguide filter 12 has a guide wavelength λg.
It is connected to the side wall at three quarters of three. At the position where the waveguide filter 12 is connected, the inductive iris is formed by the convex portion 37 at the same time. Can be. The number of the waveguide filters may be four or more, and the relationship between the positions of the waveguide filters and the respective bandwidths and center frequencies is not necessarily required to be as described above.

Embodiment 11 FIG. Embodiment 11 The configuration of Embodiment 11 of the present invention will be described with reference to FIG. FIG. 11 is a perspective view showing Embodiment 11 of the present invention.

In FIG. 11, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 12 is a waveguide filter of frequency f3, 4 is a short-circuited end, Is an inductive iris that couples the common waveguide 1 and the waveguide filter 2, 10 is an inductive iris that couples the common waveguide 1 and the waveguide filter 9, 13 is a common waveguide 1 and the waveguide Inductive iris for coupling filter 12, 37
Is an inductive protrusion provided on the side wall of the waveguide filter 12 just opposite the inductive iris 13, 7 is an input / output terminal connected to the antenna, 8 is an input / output terminal for a signal of frequency f1, and 11 is an input / output terminal of frequency f2. The signal input / output terminal 14 is a signal input / output terminal for the frequency f3.

In the waveguide duplexer constructed as described above, both of the inductive irises 5 and 10 are separated from the short-circuit end 4 by a quarter of λg1 and a quarter of λg2. The strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 changes gradually with respect to the frequency, and accordingly, the common waveguide 1 and the waveguide filters 2 and 9 change accordingly. Also changes gradually with the change in frequency (where,
λg1 and λg2 are guide wavelengths corresponding to the frequencies f1 and f2). Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the inductive irises 5 and 10. In this case, the characteristics of the waveguide filter with respect to the frequency are good over a wide band. It will be.

The waveguide filter 12 has a guide wavelength λg.
It is connected to the side wall at three quarters of three. At the position where the waveguide filter 12 is connected, the inductive iris is formed by the convex portion 37 at the same time. Can be. Also, since the discontinuity in the common waveguide 1 is uniform in the direction perpendicular to the magnetic field,
There is no portion where the electric field concentrates, and a duplexer excellent in power durability can be obtained. The number of waveguide filters is 4
There may be more than one, and the relationship between the position of the waveguide filter and the respective bandwidths and center frequencies may not necessarily be as described above.

Embodiment 12 FIG. A configuration of a twelfth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a perspective view showing a twelfth embodiment of the present invention.

In FIG. 12, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 12 is a waveguide filter of frequency f3, 4 is a short-circuited end, 15 Is a coupling hole for coupling the common waveguide 1 and the waveguide filter 2, 16 is a coupling hole for coupling the common waveguide 1 and the waveguide filter 9, and 19 is a coupling hole for coupling the common waveguide 1 and the waveguide filter 12. , A capacitive recess 38 provided on the side wall of the waveguide filter 12 just opposite the coupling hole 19, 7 an input / output terminal connected to the antenna, and 8 a frequency f.
Reference numeral 11 denotes an input / output terminal for a signal of frequency f2, and reference numeral 14 denotes an input / output terminal for a signal of frequency f3.

In the waveguide duplexer configured as described above, both of the coupling holes 15 and 16 are λg
1/4 and 1/4 of λg2,
The strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 changes gradually with respect to the frequency. The coupling amount also changes slowly with respect to the frequency (here, λg
1, λg2 is a guide wavelength corresponding to the frequencies f1 and f2). Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the coupling holes 15 and 16. In this case, the characteristics of the waveguide filter with respect to the frequency are good over a wide band. Becomes

The waveguide filter 12 has a guide wavelength λg.
It is connected to the side wall at three quarters of three. Since the capacitive concave portion 38 is formed at the position where the waveguide filter 12 is connected, the inductive effect at the frequency f3 by the waveguide filter 2 and the waveguide filter 9 can be canceled. . The number of waveguide filters may be four or more.

Embodiment 13 FIG. The configuration of Embodiment 13 of the present invention will be described with reference to FIG. FIG. 13 is a perspective view showing Embodiment 13 of the present invention.

In FIG. 13, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 12 is a waveguide filter of frequency f3, 4 is a short-circuit end, Is an inductive iris that couples the common waveguide 1 and the waveguide filter 2, 10 is an inductive iris that couples the common waveguide 1 and the waveguide filter 9, 13 is a common waveguide 1 and the waveguide Inductive iris coupling filter 12, 38
Is a capacitive recess provided on the side wall of the waveguide filter 12 just opposite the inductive iris 13, 7 is an input / output terminal connected to the antenna, 8 is an input / output terminal for a signal of frequency f1, and 11 is a signal of frequency f2. Are input / output terminals of the signal of frequency f3.

In the waveguide duplexer constructed as described above, both of the inductive irises 5 and 10 are separated from the short-circuit end 4 by a quarter of λg1 and a quarter of λg2. The strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 gradually changes with respect to the frequency. Also changes gradually with the change in frequency (where
λg1 and λg2 are guide wavelengths corresponding to the frequencies f1 and f2). Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the inductive irises 5 and 10. In this case, the characteristics of the waveguide filter with respect to the frequency are good over a wide band. It will be.

The waveguide filter 12 has a guide wavelength λg.
It is connected to the side wall at three quarters of three. Since the capacitive concave portion 38 is formed at the position where the waveguide filter 12 is connected, the inductive effect at the frequency f3 by the waveguide filter 2 and the waveguide filter 9 can be canceled. . Furthermore, since the discontinuity in the common waveguide 1 is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, and a duplexer having excellent power durability can be obtained. The number of the waveguide filters may be four or more, and the relationship between the positions of the waveguide filters and the respective bandwidths and center frequencies is not necessarily required to be as described above.

Embodiment 14 FIG. The configuration of Embodiment 14 of the present invention will be described with reference to FIG. FIG. 14 is a perspective view showing Embodiment 14 of the present invention.

In FIG. 14, 1 is a common waveguide, 2 is a waveguide filter of frequency f1, 9 is a waveguide filter of frequency f2, 12 is a waveguide filter of frequency f3, 4 is a short-circuited end, Is an inductive iris that couples the common waveguide 1 and the waveguide filter 2, 10 is an inductive iris that couples the common waveguide 1 and the waveguide filter 9, 39 is a common waveguide 1 and the waveguide An asymmetric inductive iris for coupling the filter 12, an input / output terminal 7 connected to the antenna, and a frequency f
Reference numeral 11 denotes an input / output terminal for a signal of frequency f2, and reference numeral 14 denotes an input / output terminal for a signal of frequency f3.

In the waveguide duplexer constructed as described above, both of the inductive irises 5 and 10 are separated from the short-circuit end 4 by ４ of λg1 and ４ of λg2. The strength of the magnetic field at the connection position between the common waveguide 1 and each of the waveguide filters 2 and 9 gradually changes with respect to the frequency. Also changes gradually with the change in frequency (where
λg1 and λg2 are guide wavelengths corresponding to the frequencies f1 and f2). Therefore, the design can be made on the assumption that the change in the amount of coupling with the outside with respect to the frequency depends only on the shape of the inductive irises 5 and 10. In this case, the characteristics of the waveguide filter with respect to the frequency are good over a wide band. It will be.

The waveguide filter 12 has a guide wavelength λg.
It is connected to the side wall at three quarters of three. Since the waveguide filter 12 is connected to the common waveguide 1 by the asymmetric inductive iris 39, the position of the waveguide filter 12 can be moved away from the short-circuit end 4 without changing the position of the iris. Waveguide filter 9 and waveguide filter 12
The length required for processing can be ensured as the distance between.

Further, since the discontinuity in the common waveguide 1 is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, and a duplexer excellent in power durability can be obtained. it can. The number of waveguide filters may be four or more,
The relationship between the position of the waveguide filter and the respective bandwidths and center frequencies need not necessarily be as described above. Also,
When the power performance is not a problem, a similar effect can be obtained by using a coupling hole or the like for coupling the common waveguide 1 and the waveguide filter and shifting the position of the coupling hole from the center.

[0110]

Effects of the Invention waveguide demultiplexer according to claim 1 of the present invention, or as described, TE ₁₀ mode, which is a common guide and waveguide, the fundamental mode of the common waveguide rectangular waveguide tube of
A waveguide filter connected to a side wall parallel to the electric field , wherein the common waveguide includes an input / output terminal connected to an antenna, and a short-circuited end provided at a tip opposite to the input / output terminal. The waveguide filter is provided on a rectangular waveguide, an input / output terminal for a signal of a first frequency, and an inner wall of the rectangular waveguide, and passes through the first frequency as a center frequency. A first inductive iris whose resonance frequency and size are adjusted, and which is provided on an inner wall of the rectangular waveguide, and a distance from a short-circuit end of the common waveguide is equal to the common waveguide for the first frequency. Before a quarter of the tube's in-wavelength
And the second inductive iris coupled to the side wall, the discontinuity in the common waveguide is uniform in the direction perpendicular to the magnetic field, and there is no portion where the electric field concentrates, and It has the effect of being excellent in nature.

As described above, the waveguide duplexer according to the second aspect of the present invention has the fundamental mode of the common waveguide.
Connected to the second side wall parallel to the electric field of the TE ₁₀ mode.
A second waveguide filter provided at a position substantially opposite to the waveguide filter with the common waveguide interposed therebetween, wherein the second waveguide filter has a second rectangular waveguide. A waveguide, a second input / output terminal for a signal having a second frequency different from the first frequency, and an inner wall of the second rectangular waveguide, which passes the second frequency as a center frequency. A third inductive iris whose resonance frequency and size are adjusted so as to be provided on the inner wall of the second rectangular waveguide, and the distance from the short-circuit end of the common waveguide is the second frequency. ４ of the guide wavelength of the common waveguide with respect to
Because and a fourth inductive iris coupled to the second side wall opposite the side wall, it is possible to obtain good properties over a wide frequency band. Also,
Since the discontinuity in the common waveguide is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, and an effect that the power durability is excellent.

According to a third aspect of the present invention, as described above, the fundamental mode of the common waveguide is provided.
Connected to the second side wall parallel to the electric field of the TE ₁₀ mode.
And a third waveguide filter provided on the same side as the second waveguide filter, wherein the third waveguide filter includes a third rectangular waveguide and the first waveguide filter. A third input / output terminal for a signal having a third frequency different from the second frequency, and a third input / output terminal provided on an inner wall of the third rectangular waveguide;
A fifth inductive iris whose resonance frequency and size are adjusted so as to pass the center frequency as a center frequency, and a fifth inductive iris provided on the inner wall of the third rectangular waveguide, and Good over a wide frequency band, because the distance is comprised of a sixth inductive iris coupled to the second side wall of three-quarters of the guide wavelength of the common waveguide for the third frequency. Characteristics can be obtained. In addition, since the discontinuity in the common waveguide is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, so that there is an effect that the power durability is excellent.

[0113] waveguide demultiplexer according to claim 4 of the present invention, or as described, the common waveguide rectangular waveguide tube, TE ₁₀ mode which is the fundamental mode of the common waveguide
A first waveguide filter having a first frequency that is connected to the electric field and the first side wall parallel, in the fundamental mode of the common waveguide
Connected to a second side wall parallel to the electric field of a certain TE ₁₀ mode
A second waveguide filter having a second frequency different from the first frequency and provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween, The common waveguide is a rectangular waveguide portion, an input / output terminal connected to an antenna, a short-circuited end provided at a tip opposite to the input / output terminal, and the second waveguide connected to the rectangular waveguide portion. A first having a width where the first frequency is cut off and the second frequency passes
And a second waveguide connected to the first waveguide and the short-circuited end and having a width that blocks the first and second frequencies. The waveguide filter is
A first rectangular waveguide, a first input / output terminal for a signal of the first frequency, and an inner wall of the first rectangular waveguide, passing through the first frequency as a center frequency. A first inductive iris whose resonance frequency and size are adjusted, the rectangular waveguide portion of the common waveguide, and the first inductive iris.
Is composed of a first coupling hole the distance from the connection position of the waveguide is coupled to said first side wall of one half the guide wavelength of the common waveguide for said first frequency, The second waveguide filter includes a second rectangular waveguide and the second rectangular waveguide.
A second input / output terminal for a signal having a frequency of the second frequency and a second frequency provided on the inner wall of the second rectangular waveguide and having a resonance frequency and a magnitude adjusted to pass the second frequency as a center frequency. And the first of the common waveguide
And wherein a one-half guide wavelength of the common waveguide distance from the connecting position of the second waveguide to the second frequency, of the first side wall opposite the second Since it is composed of the second coupling hole coupled to the side wall, the connection position of the waveguide filter can be given a degree of freedom, and the structure and band of the waveguide filter are not restricted. There is an effect that good characteristics can be obtained in a wide frequency band.

[0114] waveguide demultiplexer according to claim 5 of the present invention, or as described, the common waveguide rectangular waveguide tube, TE ₁₀ mode which is the fundamental mode of the common waveguide
A first waveguide filter having a first frequency that is connected to the electric field and the first side wall parallel, in the fundamental mode of the common waveguide
Connected to a second side wall parallel to the electric field of a certain TE ₁₀ mode
A second waveguide filter having a second frequency different from the first frequency and provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween, The common waveguide is a rectangular waveguide portion, an input / output terminal connected to an antenna, a short-circuited end provided at a tip opposite to the input / output terminal, and the second waveguide connected to the rectangular waveguide portion. A first having a width where the first frequency is cut off and the second frequency passes
And a second waveguide connected to the first waveguide and the short-circuited end and having a width that blocks the first and second frequencies. The waveguide filter is
A first rectangular waveguide, an input / output terminal for a signal of the first frequency, and a resonance frequency provided on an inner wall of the first rectangular waveguide and passing the first frequency as a center frequency. a first inductive iris and the size is adjusted, the first provided on the inner wall of the rectangular waveguide, the common waveguide of the waveguide parts and the first waveguide second distance from the connection position is coupled to said first side wall of one half the guide wavelength of the common waveguide for said first frequency
Wherein the second waveguide filter comprises: a second rectangular waveguide; a second input / output terminal for the signal of the second frequency; and a second rectangular waveguide. A third inductive iris provided on the inner wall of the waveguide and having a resonance frequency and a size adjusted to pass the second frequency as a center frequency, and provided on an inner wall of the second rectangular waveguide; The distance of the common waveguide from the connection position of the first and second waveguides is one half of the guide wavelength of the common waveguide with respect to the second frequency; the so fourth is composed of an inductive iris, can have a degree of freedom in the connection position of the waveguide filter, the waveguide filter coupled to said second side wall opposite the side wall Good characteristics can be obtained in a wide band without being limited by the structure and band of the above. In addition, since the discontinuity in the common waveguide is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, so that there is an effect that the power durability is excellent.

[0115] waveguide demultiplexer according to claim 6 of the present invention, or as described, the common waveguide rectangular waveguide tube, TE ₁₀ mode which is the fundamental mode of the common waveguide
A first waveguide filter having a first frequency that is connected to the electric field and the first side wall parallel, in the fundamental mode of the common waveguide
Connected to a second side wall parallel to the electric field of a certain TE ₁₀ mode
A second waveguide filter having a second frequency different from the first frequency and provided at a position substantially opposed to the first waveguide filter with the common waveguide interposed therebetween; 1
And a waveguide filter for a signal of a third frequency different from the second frequency, wherein the common waveguide has the first filter.
And a first impedance transformer that converts the waveguide into a waveguide having a width through which the third frequency passes when the second frequency is cut off, wherein the third frequency passes while the first and second frequencies are cut off A first and a second waveguide having a width, a fourth inductive iris sandwiched and connected between the first and the second waveguide, and a book connected to the second waveguide. A third waveguide filter connected via a second impedance transformer that converts the waveguide width into a waveguide width of the waveguide filter, wherein the common waveguide includes a rectangular waveguide portion; An input / output terminal connected to an antenna, wherein the first waveguide filter includes a first rectangular waveguide, a first input / output terminal for a signal of the first frequency, and a first input / output terminal. The resonance frequency and the large frequency are provided on the inner wall of the rectangular waveguide and pass through the first frequency as a center frequency. Said common waveguide and the first inductive iris, to the distance said first frequency from the connection position of the waveguide parts and the first impedance transformer of the common waveguide has been adjusted is is composed of a first coupling hole coupled to the first side wall of one half the guide wavelength of the tube, said second waveguide filter includes a second rectangular waveguide, wherein the A second input / output terminal for a signal having a frequency of 2 and an inner wall of the second rectangular waveguide;
From the connection position of the second inductive iris whose resonance frequency and size have been adjusted so as to pass the center frequency as the center frequency and the rectangular waveguide portion of the common waveguide and the first impedance transformer. Is a half of the guide wavelength of the common waveguide with respect to the second frequency,
Wherein is composed of a second coupling hole coupled to the second side wall opposite the first side wall, said third waveguide filter includes a third rectangular waveguide, the third A third input / output terminal for a signal having a frequency of the third frequency, and a third frequency provided on the inner wall of the third rectangular waveguide and having a resonance frequency and a magnitude adjusted so as to pass the third frequency as a center frequency. And the third coupling hole coupled to the common waveguide via the second impedance transformer, so that good characteristics can be obtained in a wide frequency band. Is obtained.

[0116] waveguide demultiplexer according to claim 7 of the present invention, or as described, the common waveguide rectangular waveguide tube, TE ₁₀ mode which is the fundamental mode of the common waveguide
A first waveguide filter having a first frequency that is connected to the electric field and the first side wall parallel, in the fundamental mode of the common waveguide
Connected to a second side wall parallel to the electric field of a certain TE ₁₀ mode
A second waveguide filter having a second frequency different from the first frequency and provided at a position substantially opposed to the first waveguide filter with the common waveguide interposed therebetween; 1
And a waveguide filter for a signal of a third frequency different from the second frequency, wherein the common waveguide has the first filter.
And a first impedance transformer that converts the waveguide into a waveguide having a width through which the third frequency passes when the second frequency is cut off, wherein the third frequency passes while the first and second frequencies are cut off A first and a second waveguide having a width, a seventh inductive iris sandwiched and connected between the first and the second waveguide, and a book connected to the second waveguide. A third waveguide filter connected via a second impedance transformer that converts the waveguide width into a waveguide width of the waveguide filter, wherein the common waveguide includes a rectangular waveguide portion; An input / output terminal connected to an antenna, wherein the first waveguide filter includes a first rectangular waveguide, an input / output terminal for the signal of the first frequency, and the first rectangular waveguide. Installed on the inner wall of the pipe,
A first inductive iris whose resonance frequency and size are adjusted to pass the first frequency as a center frequency, and an inductive iris provided on an inner wall of the first rectangular waveguide; the distance from the connection position of the waveguide parts and the first impedance transformer is coupled to said first side wall of one half the guide wavelength of the common waveguide for said first frequency A second inductive iris, wherein the second waveguide filter includes a second rectangular waveguide, a second input / output terminal for the signal of the second frequency, and a second rectangular filter. A third inductive iris provided on the inner wall of the waveguide and having a resonance frequency and a size adjusted to pass the second frequency as a center frequency, and provided on an inner wall of the second rectangular waveguide; Wherein the rectangular waveguide portion of the common waveguide and the first A first distance from the connecting position of the impedance transformer is half the guide wavelength of the common waveguide for said second frequency, coupled to said second side wall opposite the first side wall And a fourth inductive iris, wherein the third waveguide filter comprises a third inductive iris.
, A third input / output terminal for a signal of the third frequency, and an inner wall of the third rectangular waveguide, which resonate so as to pass the third frequency as a center frequency. A fifth inductive iris whose frequency and magnitude are adjusted;
The sixth inductive iris provided on the inner wall of the third rectangular waveguide and coupled to the second impedance transformer enables characteristics to be improved in a wide frequency band. In addition, since the discontinuity in the waveguide is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, so that there is an effect that power durability is excellent.

[0117] waveguide demultiplexer according to claim 8 of the present invention, or as described, the common waveguide rectangular waveguide tube, TE ₁₀ mode which is the fundamental mode of the common waveguide
A first waveguide filter connected to the electric field and the first side wall parallel, TE ₁₀ mode is a fundamental mode of said common waveguide
Is connected to the second side wall parallel to the electric field of de, the common waveguide and across said first waveguide filter and the second waveguide filter provided in substantially opposite positions, the common Guided wave
The parallel to the electric field of the TE ₁₀ mode which is a fundamental mode of the tube 2
And a third waveguide filter provided on the same side as the second waveguide filter, wherein the common waveguide comprises: an input / output terminal connected to an antenna; And a short-circuit end provided at a tip opposite to the terminal. The first waveguide filter includes a first rectangular waveguide, an input / output terminal for a signal of a first frequency, A first inductive iris provided on an inner wall of the first rectangular waveguide and having a resonance frequency and a size adjusted to pass the first frequency as a center frequency, and a short-circuit end of the common waveguide. is composed of a first coupling hole distance is coupled to said first side wall of one quarter of the guide wavelength of the common waveguide for said first frequency, said second waveguide filter And a second rectangular waveguide and a signal having a second frequency different from the first frequency. A second inductive iris provided on the inner wall of the second rectangular waveguide and having a resonance frequency and a magnitude adjusted to pass the second frequency as a center frequency; the distance from the short end of the common waveguide a quarter of the guide wavelength of the common waveguide for said second frequency, said second side wall opposite the first side wall A second coupling hole coupled to the third waveguide filter, wherein the third waveguide filter has a third rectangular waveguide and a third rectangular wave filter having a third frequency different from the first and second frequencies. A third inductive iris provided on the inner wall of the third rectangular waveguide and having a resonance frequency and a magnitude adjusted to pass the third frequency as a center frequency; The distance from the short-circuit end of the common waveguide is equal to the common frequency for the third frequency. A third coupling hole coupled to the second side wall of three quarters of the waveguide wavelength of the waveguide, wherein the third coupling hole is the first side wall of the common waveguide. Are provided with inductive convex portions as viewed from the inner wall of the common waveguide,
Good characteristics can be obtained over a wide frequency band, and the effect of the capacitance of the filter at the position considered to be the short-circuit end or open end of the filter connected to a certain position on the side wall facing the filter The effect can be reduced by the provided iris, and the characteristics can be improved in a wider frequency band.

According to a ninth aspect of the present invention, as described above, the sixth inductive iris is provided on the first side wall of the common waveguide. Are provided with inductive protrusions as viewed from the inner wall of the common waveguide, so that good characteristics can be obtained over a wide frequency band, and the waveguide connected to a certain position is provided. The capacitive effect of the waveguide filter located on the side of the filter that is regarded as the short-circuited end or the open end with respect to the filter can be reduced by the asymmetric inductive iris provided on the opposing side wall. The characteristics can be improved in a wide frequency band. In addition, since the discontinuity in the waveguide is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, so that there is an effect that power durability is excellent.

[0119] waveguide demultiplexer according to claim 10 of the present invention, as described above, a first side wall of said common waveguide, in a position facing the third coupling holes Since the capacitive concave portion is provided instead of the inductive convex portion when viewed from the inner wall of the common waveguide, good characteristics can be obtained over a wide frequency band, and the capacitor is connected to a certain position. The effect of the inductive property of the filter located on the side considered to be the short-circuited end or the open end with respect to the filtered filter can be reduced by the iris provided on the opposing side wall, and the characteristics can be improved in a wider frequency band This has the effect of becoming

As described above, the waveguide splitter according to claim 11 of the present invention is the waveguide in which the sixth inductive iris is provided on the first side wall of the common waveguide. In the opposite position, instead of the inductive convex portion, a capacitive concave portion as viewed from the inner wall of the common waveguide is provided, so that good characteristics can be obtained over a wide frequency band, For a waveguide filter connected to a certain position, the inductive effect of the waveguide filter located at a position considered to be a short-circuit end or an open end from the waveguide filter is reduced by an iris provided on the opposing side wall. Characteristic can be improved in a wider frequency band. In addition, since the discontinuity in the waveguide is uniform in the direction perpendicular to the magnetic field, there is no portion where the electric field concentrates, so that there is an effect that power durability is excellent.

According to a twelfth aspect of the present invention, as described above, the third waveguide filter is provided.
But instead of the sixth inductive iris, an asymmetric induction
Short-circuited or open
From the position regarded as the emission end, the eye of each waveguide filter
Waveguide fill without changing the distance to the center of the squirrel
The distance between the waveguides can be increased,
This brings about an effect that the data can be arranged in close proximity .

[0122]

[0123]

[0124]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing Embodiment 2 of the present invention.

FIG. 3 is a perspective view showing a third embodiment of the present invention.

FIG. 4 is a perspective view showing Embodiment 4 of the present invention.

FIG. 5 is a perspective view showing Embodiment 5 of the present invention.

FIG. 6 is a perspective view showing Embodiment 6 of the present invention.

FIG. 7 is a perspective view showing Embodiment 7 of the present invention.

FIG. 8 is a perspective view showing Embodiment 8 of the present invention.

FIG. 9 is a perspective view showing Embodiment 9 of the present invention.

FIG. 10 is a perspective view showing Embodiment 10 of the present invention.

FIG. 11 is a perspective view showing an eleventh embodiment of the present invention.

FIG. 12 is a perspective view showing Embodiment 12 of the present invention.

FIG. 13 is a perspective view showing Embodiment 13 of the present invention.

FIG. 14 is a perspective view showing Embodiment 14 of the present invention.

FIG. 15 is a perspective view showing a conventional waveguide duplexer.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 common waveguide, 2 waveguide filter of pass frequency f 1, 3 inductive iris, 4 short-circuit end, 5 inductive iris, 6 rectangular waveguide, 7 input / output terminal connected to antenna, 8 input / output of frequency f 1 Terminal, 9 pass frequency f
2 waveguide filter, 10 inductive iris, 11 input / output terminal of frequency f2, 12 waveguide filter of pass frequency f3, 13 inductive iris, 14 input / output terminal of frequency f3, 15 coupling hole, 16 coupling hole , 17 f1
Is a cut-off waveguide, f2 is a pass-through waveguide, 18f1, f2 is a cut-off waveguide, 19 coupling holes, 20 impedance transformers,
21 A waveguide in which f1 and f2 are cut off and f3 is passed, 22
Inductive iris, 23 impedance transformer, 24
Waveguide filter of frequency f4, 25 waveguide filter of frequency f5, 26 coupling hole, 27 coupling hole, 28 input / output terminal of frequency f4, 29 input / output terminal of frequency f5,
30 Waveguide through which f3, f4, f5 passes, 31 Impedance transformer, 32 Waveguide through which f3, f4 is cut off and f5 passes, 33 Inductive iris, 34 Impedance transformer, 35 Inductive iris, 36 Induction Iris, 37 inductive convex, 38 capacitive concave, 3
9 Asymmetric inductive iris.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yu Nishino 5-1-1 Ofuna, Kamakura City Inside Mitsubishi Electric Corporation Electronic Systems Research Laboratory (72) Inventor Sosuke Horie 5-1-1 Ofuna, Kamakura City Mitsubishi Electric Inside the Electronic Systems Research Laboratory, Inc. (72) Inventor Miyazaki, Mamoru, Yasunori 5-1-1, Ofuna, Kamakura City Mitsubishi Electric Corporation Inside the Electronic Systems Research Laboratory, (72) Inventor Hideki Asao, 5-chome Ofuna, Kamakura City No. 1-1, Mitsubishi Electric Corporation Electronic Systems Laboratory (72) Inventor Makio Tsuchiya 5-1-1, Ofuna, Kamakura City Mitsubishi Electric Corporation Electronic Systems Laboratory (56) References JP-A-1-303801 JP, A) JP-A-63-158902 (JP, A) JP-A-3-96001 (JP, A) JP-A-57-62602 (JP, A) JP-A-59-628 143403 (JP, A) JP-A-57-53103 (JP, A) JP-A-7-22803 (JP, A) JP-A-6-140810 (JP, A) JP-A-58-220502 (JP, A) JP-A-48-20461 (JP, A) JP-A-3-165601 (JP, A) JP-A-61-39601 (JP, A) Japanese Utility Model Application No. 57-80902 (JP, U) Japanese Utility Model Application No. Sho 62-181003 (JP, U) JP-B-51-15951 (JP, B1) The Institute of Telecommunications, edited by "Microwave Engineering" (Corona, 1958), pages 219-221 (58) Fields investigated (Int. Cl. ⁷ , DB name) H01P 1/213

Claims (12)

(57) [Claims] 1. A common waveguide rectangular waveguide tube, the electric field of the common waveguide is a fundamental mode TE ₁₀ mode
And a waveguide filter connected to the side wall parallel to the common waveguide, wherein the common waveguide is an input / output terminal connected to an antenna,
A short-circuit end provided at a tip opposite to the input / output terminal, wherein the waveguide filter includes a rectangular waveguide, an input / output terminal for a signal of a first frequency, and the rectangular waveguide. A first inductive iris provided on an inner wall of the rectangular waveguide and having a resonance frequency and a size adjusted to pass the first frequency as a center frequency, and provided on an inner wall of the rectangular waveguide; and wherein the distance from the short end of the tube is composed of the second inductive iris coupled to one of said side walls a quarter of the guide wavelength of the common waveguide for said first frequency Waveguide splitter. 2. The fundamental mode of said common waveguide, TE
_A second waveguide filter connected to a second side wall parallel to the _10- mode electric field and provided at a position substantially opposite to the waveguide filter with the common waveguide interposed therebetween; The second waveguide filter includes a second rectangular waveguide, a second input / output terminal for a signal having a second frequency different from the first frequency, and an inner wall of the second rectangular waveguide. Provided,
A third inductive iris whose resonance frequency and size are adjusted to pass through the second frequency as a center frequency, and a third inductive iris provided on an inner wall of the second rectangular waveguide, and a short circuit of the common waveguide. a first distance is a quarter of the guide wavelength of the common waveguide for said second frequency from the end, and a fourth inductive iris coupled to the second side wall opposite the side wall 2. The waveguide duplexer according to claim 1, comprising: 3. The fundamental mode of said common waveguide, TE
A third waveguide filter connected to the second side wall parallel to the _10- mode electric field and provided on the same side as the second waveguide filter, wherein the third waveguide filter is A third rectangular waveguide, a third input / output terminal for a signal having a third frequency different from the first and second frequencies, and an inner wall of the third rectangular waveguide; A fifth inductive iris whose resonance frequency and size are adjusted so as to pass the third frequency as a center frequency, a fifth inductive iris provided on an inner wall of the third rectangular waveguide, and a short-circuit end of the common waveguide. The distance from the second frequency is three quarters of the guide wavelength of the common waveguide for the third frequency.
3. The waveguide duplexer according to claim 2, further comprising a sixth inductive iris coupled to a side wall of the waveguide. 4. A common waveguide rectangular waveguide tube, the electric field of the common waveguide is a fundamental mode TE ₁₀ mode
First the first waveguide filter frequency, the electric field of the TE ₁₀ mode which is a fundamental mode of said common waveguide connected to the first side wall parallel to the
And a second frequency different from the first frequency provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween. Wherein the common waveguide comprises a rectangular waveguide portion, an input / output terminal connected to an antenna, a short-circuited end provided at a tip opposite to the input / output terminal, and A first waveguide connected to a waveguide section and having a width through which the first frequency is cut off and the second frequency passes; and a first waveguide connected to the first waveguide and the short-circuit end. A second having a width at which the first and second frequencies are cut off
Wherein the first waveguide filter includes a first rectangular waveguide, a first input / output terminal for the signal of the first frequency, and a first input / output terminal.
A first inductive iris provided on the inner wall of the rectangular waveguide of which the resonance frequency and the magnitude are adjusted so as to pass the first frequency as a center frequency, and the rectangular waveguide of the common waveguide. first coupling the distance from the connecting position of the pipe section and the first waveguide coupled to said first side wall of one half the guide wavelength of the common waveguide for said first frequency The second waveguide filter comprises a second rectangular waveguide, a second input / output terminal for a signal of the second frequency, and the second waveguide.
A second inductive iris provided on the inner wall of the rectangular waveguide of which the resonance frequency and the magnitude are adjusted so as to pass the second frequency as a center frequency, and the first and the second irises of the common waveguide. a one-half the guide wavelength of the common waveguide distance for said second frequency from the connecting position of the second waveguide, said second side wall opposite the first side wall And a second coupling hole coupled to the waveguide splitter. A common waveguide 5. rectangular waveguide tube, wherein the basic mode of the common waveguide TE ₁₀ mode field
First the first waveguide filter frequency, the electric field of the TE ₁₀ mode which is a fundamental mode of said common waveguide connected to the first side wall parallel to the
And a second frequency different from the first frequency provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween. Wherein the common waveguide comprises a rectangular waveguide portion, an input / output terminal connected to an antenna, a short-circuited end provided at a tip opposite to the input / output terminal, and A first waveguide connected to a waveguide section and having a width through which the first frequency is cut off and the second frequency passes; and a first waveguide connected to the first waveguide and the short-circuit end. A second having a width at which the first and second frequencies are cut off
Wherein the first waveguide filter comprises a first rectangular waveguide, an input / output terminal for the signal of the first frequency, and a first rectangular waveguide. A first inductive iris provided on an inner wall and having a resonance frequency and a magnitude adjusted to pass the first frequency as a center frequency, and a first inductive iris provided on an inner wall of the first rectangular waveguide; before the distance from the connection position of the waveguide parts and the first waveguide of the waveguide is one-half the guide wavelength of the common waveguide for said first frequency
A second inductive iris coupled to the first side wall, the second waveguide filter comprising: a second rectangular waveguide; and a second inductive iris of the second frequency signal. An input / output terminal and the second
A third inductive iris provided on the inner wall of the rectangular waveguide of which the resonance frequency and the magnitude are adjusted so as to pass the second frequency as a center frequency, and the inner wall of the second rectangular waveguide Wherein the distance of the common waveguide from the connection position of the first and second waveguides is one half of the guide wavelength of the common waveguide with respect to the second frequency,
Fourth waveguide demultiplexer characterized in that it is composed of an inductive iris coupled to the second side wall opposite the first side wall. A common waveguide 6. rectangular waveguide tube, wherein the basic mode of the common waveguide TE ₁₀ mode field
First the first waveguide filter frequency, the electric field of the TE ₁₀ mode which is a fundamental mode of said common waveguide connected to the first side wall parallel to the
And a second frequency different from the first frequency provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween. And a waveguide filter for a signal having a third frequency different from the first and second frequencies, wherein the common waveguide includes:
A first impedance transformer for converting the waveguide into a waveguide having a width through which the first and second frequencies are cut off and the third frequency passes, and wherein the first and second frequencies are cut off when the first and second frequencies are cut off;
First and second waveguides having a width through which the frequency of
A fourth inductive iris connected between the first and second waveguides and a second inductive iris connected to the second waveguide and converted to a waveguide width of the present waveguide filter; A third waveguide filter connected via an impedance transformer, wherein the common waveguide includes a rectangular waveguide section and an input / output terminal connected to an antenna; The waveguide filter includes: a first rectangular waveguide; a first input / output terminal for the signal of the first frequency;
A first inductive iris provided on the inner wall of the rectangular waveguide of which the resonance frequency and the size are adjusted so as to pass the first frequency as a center frequency, and the rectangular waveguide of the common waveguide. first coupling the distance from the connecting position of the pipe section and the first impedance transformer is coupled to said first side wall of one half the guide wavelength of the common waveguide for said first frequency A second rectangular waveguide, a second input / output terminal for a signal of the second frequency, and a second
A second inductive iris provided on the inner wall of the rectangular waveguide of which the resonance frequency and the magnitude are adjusted so as to pass the second frequency as a center frequency, and the rectangular waveguide of the common waveguide. a first distance from the connecting position of the pipe section and the first impedance transformer is half the guide wavelength of the common waveguide for said second frequency, said opposite the first side wall A second coupling hole coupled to a second side wall, the third waveguide filter comprising: a third rectangular waveguide; and a third input / output of a signal of the third frequency. Terminal and the third
Of provided on the inner wall of the rectangular waveguide, the third and the third inductive iris resonant frequency and magnitude to pass as the center frequency is adjusted to frequency, the second Inpi
A third coupled to the common waveguide via a dance transformer
And a coupling hole. 7. A common waveguide rectangular waveguide tube, the electric field of the common waveguide is a fundamental mode TE ₁₀ mode
First the first waveguide filter frequency, the electric field of the TE ₁₀ mode which is a fundamental mode of said common waveguide connected to the first side wall parallel to the
And a second frequency different from the first frequency provided at a position substantially opposite to the first waveguide filter with the common waveguide interposed therebetween. And a waveguide filter for a signal having a third frequency different from the first and second frequencies, wherein the common waveguide includes:
A first impedance transformer for converting the waveguide into a waveguide having a width through which the first and second frequencies are cut off and the third frequency passes, and wherein the first and second frequencies are cut off when the first and second frequencies are cut off;
First and second waveguides having a width through which the frequency of
A seventh inductive iris connected between the first and second waveguides and a second inductive iris connected to the second waveguide and converted to the waveguide width of the present waveguide filter; A third waveguide filter connected via an impedance transformer, wherein the common waveguide includes a rectangular waveguide section and an input / output terminal connected to an antenna; The waveguide filter is provided on a first rectangular waveguide, an input / output terminal for a signal of the first frequency, and an inner wall of the first rectangular waveguide, and has a first frequency center frequency. A first inductive iris whose resonance frequency and size are adjusted to pass through the first waveguide and an inner iris provided on the inner wall of the first rectangular waveguide; A distance from the connection position of the first impedance transformer to the first frequency. Is composed of a second inductive iris coupled to the first side wall of one half the guide wavelength of the waveguide, said second waveguide filter includes a second rectangular waveguide A second input / output terminal for the signal of the second frequency;
A third inductive iris provided on the inner wall of the rectangular waveguide of which the resonance frequency and the magnitude are adjusted so as to pass the second frequency as a center frequency, and the inner wall of the second rectangular waveguide And a distance from a connection position between the rectangular waveguide portion of the common waveguide and the first impedance transformer is a half of a guide wavelength of the common waveguide with respect to the second frequency. And on the opposite side of said first side wall.
A fourth inductive iris coupled to the second side wall, wherein the third waveguide filter includes a third rectangular waveguide and a third one of the third frequency signal. An input / output terminal;
A fifth inductive iris provided on an inner wall of the rectangular waveguide of which the resonance frequency and the size are adjusted so as to pass the third frequency as a center frequency, and an inner wall of the third rectangular waveguide And a sixth inductive iris coupled to the second impedance transformer. A common waveguide 8. rectangular waveguide tube, wherein the basic mode of the common waveguide TE ₁₀ mode field
First and waveguide filter, said a fundamental mode of the common waveguide TE ₁₀ mode electric field coupled to a first side wall parallel to the
A second waveguide filter connected to a second side wall parallel to the first waveguide filter and provided at a position substantially opposite to the first waveguide filter across the common waveguide; Electric field of TE ₁₀ mode which is the fundamental mode of
And a third waveguide filter connected to a second side wall parallel to the third waveguide filter and provided on the same side as the second waveguide filter. The common waveguide has an input / output terminal connected to an antenna. When,
A short-circuit end provided at a tip opposite to the input / output terminal, wherein the first waveguide filter has a first rectangular waveguide, and an input / output terminal for a signal of a first frequency. A first inductive iris provided on an inner wall of the first rectangular waveguide and having a resonance frequency and a size adjusted so as to pass the first frequency as a center frequency, and a first inductive iris of the common waveguide; is composed of a first coupling hole distance from the short-circuit end is coupled to said first side wall of one quarter of the guide wavelength of the common waveguide for said first frequency, said second electrically A waveguide filter provided on a second rectangular waveguide, a second input / output terminal of a signal having a second frequency different from the first frequency, and an inner wall of the second rectangular waveguide;
A second inductive iris whose resonance frequency and size are adjusted to pass the second frequency as a center frequency, and a distance from a short-circuited end of the common waveguide to the common conductive iris relative to the second frequency. a quarter of the guide wavelength of the wave tube, said first is composed of a second coupling hole coupled to the second side wall opposite the side wall, the third waveguide filter Are provided on a third rectangular waveguide, a third input / output terminal of a signal having a third frequency different from the first and second frequencies, and an inner wall of the third rectangular waveguide; A third inductive iris whose resonance frequency and size are adjusted so as to pass through the third frequency as a center frequency, and a distance from a short-circuited end of the common waveguide to the third common iris for the third frequency. A third coupled to the second side wall of three quarters of the waveguide wavelength of the waveguide; An inductive projection as viewed from the inner wall of the common waveguide is provided at a first side wall of the common waveguide, at a position facing the third coupling hole. A waveguide duplexer, which is characterized in that: 9. An inductive protrusion as viewed from an inner wall of the common waveguide is provided at the first side wall of the common waveguide, at a position facing the sixth inductive iris. 4. The waveguide duplexer according to claim 3, wherein: 10. The first side wall of the common waveguide, which is located at a position facing the third coupling hole, instead of the inductive projection, from the inner wall of the common waveguide. 9. The waveguide duplexer according to claim 8, wherein a capacitive recess is provided. 11. An inner wall of the common waveguide instead of the inductive protrusion on the first side wall of the common waveguide, opposite to the sixth inductive iris. The waveguide duplexer according to claim 9, further comprising a capacitive recess. 12. The waveguide demultiplexer according to claim 3, wherein the third waveguide filter is constituted by an asymmetric inductive iris instead of the sixth inductive iris. vessel.