CN206461069U - A kind of many transmission zero wave filters - Google Patents
A kind of many transmission zero wave filters Download PDFInfo
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- CN206461069U CN206461069U CN201720180887.6U CN201720180887U CN206461069U CN 206461069 U CN206461069 U CN 206461069U CN 201720180887 U CN201720180887 U CN 201720180887U CN 206461069 U CN206461069 U CN 206461069U
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20354—Non-comb or non-interdigital filters
- H01P1/20381—Special shape resonators
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Abstract
The utility model embodiment provides a kind of many transmission zero wave filters, including from the signal input part of wave filter to the signal transmission path of signal output part；At least three resonators set along signal transmission path, wherein, it is connected with each other between at least two pairs adjacent resonators in hybrid coupled mode, to produce at least two transmission zeros between the signal input part and signal output part of wave filter.The application provide many transmission zero wave filters between at least two pairs adjacent resonators with hybrid coupled by way of connect, wave filter is enabled to produce at least two transmission zeros, that is, wave filter enable in the low side and/or the transmission zero of high-end generation at least two of passband, while the rectangular degree of wave filter is effectively improved, extra additional coupled structure need not be increased again, the volume of wave filter is greatly reduced.
Description
Technical field
The utility model is related to frequency microwave communication and Radar Technology field, more particularly to a kind of many transmission zero filtering
Device.
Background technology
Wave filter can be effectively filtered out to the frequency beyond the frequency of specific frequency or the frequency, obtain a spy
Determine the signal of frequency, or eliminate the signal after a specific frequency, it is primarily served outside the effect of FREQUENCY CONTROL, i.e. rejection band
Noise, eliminate garbage signal to reduce the interference that garbage signal is produced to useful signal.
The product for being related to frequency transmitting and receiving is typically necessary wave filter, and fast with radar and wireless communication field
Speed development, the requirement more and more higher to filter frequencies control ability suppresses the performance of noise, it is necessary to reality to improve wave filter
Now many transmission zero filtering, current wave filter is when realizing many transmission zero filtering, generally using extra additional coupling knot
Structure, causes the complicated of wave filter, volume is big.
Utility model content
Embodiment of the present utility model provides a kind of many transmission zero wave filters, in additional coupling knot that need not be extra
In the case of structure, many transmission zeros filtering of wave filter is realized, the rectangular degree of wave filter is effectively increased, and wave filter has
It is simple in construction, the advantage of small volume.
To reach above-mentioned purpose, many transmission zero wave filters that embodiment of the present utility model is provided are included from wave filter
Signal transmission path of the signal input part to signal output part；At least three resonators set along signal transmission path, its
In, it is connected with each other between at least two pairs adjacent resonators in the way of hybrid coupled, in signal input part and signal
At least two transmission zeros are produced between output end.
Alternatively, above-mentioned resonator includes resonant rod and ground hole, and resonant rod is arranged on the medium substrate of wave filter
Surface, is connected by the back side of ground hole and medium substrate.
Alternatively, it is connected with each other specially in the way of hybrid coupled between adjacent resonator：Adjacent resonator it
Between connection circuit equivalent in the termination power being made up of capacitive element and inductive element.
Alternatively, it is mixed based on inductive coupled between the adjacent resonators that at least two pairs are connected in hybrid coupled mode
Close coupled modes.
Alternatively, it is mixed based on capacitive coupling between the adjacent resonators that at least two pairs are connected in hybrid coupled mode
Close coupled modes.
Alternatively, the short at one end of resonator, the other end passes through capacity earth.
Alternatively, input feed circuit is provided with the signal input part side of wave filter, and resonator is presented by inputting
Circuit is connected with the signal input part of wave filter, and the output end side of wave filter is provided with output feed circuit, and humorous
The device that shakes is connected by exporting feed circuit with signal output part.
To sum up, many transmission zero wave filters that the application is provided transmit road in the signal of signal input part to signal output part
Set and connected between at least three resonators, and at least two pairs adjacent resonators by way of hybrid coupled on footpath, and be somebody's turn to do
The mode of hybrid coupled can produce transmission zero between the signal input part and signal output part of wave filter, you can to suppress
The outer frequency of filter passband, while the rectangular degree of wave filter is effectively improved, need not increase extra additional coupling knot again
Structure, greatly reduces the volume of wave filter.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the utility model embodiment, embodiment or prior art will be retouched below
The accompanying drawing used required in stating is briefly described, it should be apparent that, drawings in the following description are only the utility model
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
A kind of one of equivalent circuit diagram of many transmission zero wave filters that Figure 1A provides for the utility model embodiment；
The two of the equivalent circuit diagram for a kind of many transmission zero wave filters that Figure 1B provides for the utility model embodiment；
One of circuit diagram of many transmission zero wave filters that Fig. 2A provides for the utility model embodiment；
The plane structure chart for the wave filter corresponding with Fig. 2A that Fig. 2 B provide for the utility model embodiment；
The three-dimensional structure diagram for the wave filter corresponding with Fig. 2A that Fig. 2 C provide for the utility model embodiment；
The two of the circuit diagram for many transmission zero wave filters that Fig. 3 provides for the utility model embodiment；
The three of the circuit diagram for many transmission zero wave filters that Fig. 4 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Wave filter plays key effect in the transmitting and reception of signal, and the quality of its performance has very to communication system
Big influence.In the prior art in order to realize many transmission zero filtering, extra additional coupled structure is employed, causes wave filter
Volume it is excessive, in order to avoid wave filter volume is excessive, this application provides a kind of simple and compact for structure, small many transmission of size
Zero filter.
Figure 1A and Figure 1B can as the embodiment of the present application median filter equivalent circuit diagram, such as Figure 1A and Figure 1B institutes
Show, many transmission zero wave filters that the application is provided include signal input part IN to signal output part OUT signal transmission path,
Wave filter at least three resonators set along signal transmission path, Figure 1A and Figure 1B just includes at least three resonance
Device, as illustrated in the drawing resonator 1, resonator 2, resonator N-1 and resonator N, wherein, at least two pairs adjacent resonance
It is connected with each other between device in the way of hybrid coupled, to be produced at least between the signal input part and signal output part of wave filter
Two transmission zeros.
It should be noted that in wave filter described by the embodiment of the present application, the hybrid coupled between adjacent resonator
Mode can be it is inductive coupled based on or capacitive coupling based on, wherein, it is inductive coupled based on that is when with mix
Coupled modes connect when show as it is inductive coupled, based on capacitive coupling i.e. show as capacitive coupling when being connected in hybrid coupled mode
Close.As shown in Figure 2 A, the hybrid coupled mode between the resonator 8 of resonator 7 will appear as inductive coupled, can use herein
Inductance element represents, it should be understood that, what is represented here with inductance element is mixed between the resonator 8 of resonator 7
Close coupled modes and show as inductive coupled, and do not indicate that and connected by inductance element between the resonator 8 of resonator 7, resonator 9
Connection between resonator 10 is similar with the connection between the resonator 8 of resonator 7.And between the resonator 7 of resonator 3,
Between the resonator 9 of resonator 8, the connection between the resonator 11 of resonator 10 is equivalent to capacitive element and inductive element composition
Termination power, the hybrid coupled mode between now adjacent resonator may show as inductive coupled, it is also possible to show as
Capacitive coupling, it is also possible to both do not appeared as inductive coupled, does not appear as capacitive coupling yet, certainly, if adjacent resonator it
Between be it is inductive coupled based on or capacitive coupling based on very clearly, can also directly as between the resonator 8 of resonator 7 that
Sample is represented with inductance element or represents (not shown) with capacity cell.But wave filter in the embodiment of the present application
In, it is necessary to the hybrid coupled mode met between at least two adjacent resonators shows as capacitive coupling and/or inductive coupled
Based on.
In wave filter described herein, the equivalent circuit diagram between resonator is exactly as shown in Figures 1 A and 1 B 1
L1And C1... ... LN-1And CN-1The termination power composed in parallel, in the wave filter shown in Figure 1A and Figure 1B, adjacent resonator
Between be connected with each other by way of termination power is with hybrid coupled, the termination power plays a part of trapper, when adjacent
When hybrid coupled mode between resonator shows as inductive coupled, the resonant frequency of the circuit is in the height of filter passband
End, will filter passband high-end generation transmission zero, when the hybrid coupled mode between resonator shows as capacitive coupling
During conjunction, the resonant frequency of the circuit is in the low side of filter passband, will produce transmission zero in the low side of wave filter, and originally
Application is provided with trapper between at least two pairs adjacent resonators, because trapper can produce the low side of filter passband
Or high-end resonant frequency, thus at least two transmission zeros can be produced in the high-end and/or low side of filter passband, you can
At least two transmission zeros can be produced in the low side of filter passband, may be passed in the high-end generation at least two of filter passband
Defeated zero point, it is also possible to the low side of filter passband produce at least one transmission zero and passband high-end generation at least one
Transmission zero, therefore, the scheme that the application is provided effectively increase the rectangle of wave filter by way of setting height end resistance band
Degree.
Alternatively, it can be set in input feed circuit, such as Figure 1A and Figure 1B in the side of the signal input part of wave filter
K1, feed circuit K1 can be equivalent to by inductive element L0With capacitive element C0The circuit composed in parallel, the signal of wave filter
Input IN is connected by feed circuit K1 with resonator 1.It should be noted that input feed circuit K1 has capacitive coupling
Close, it is inductive coupled, and three kinds of feed forms of the perceptual hybrid coupled of capacitive.Wave filter in such as Fig. 2A and Fig. 4, in signal input part
Side uses is exactly capacitively coupled feed form, and use inductive coupled feed form in figure 3.Such as Figure 1A
With shown in Figure 1B, resonator 1 is connected by the input feed circuit K1 with the signal input part IN of wave filter.
Alternatively, output feed circuit K2, feed circuit K2 can also be set in the signal output part side of wave filter
It can be equivalent to by inductive element L00With capacitive element C00The circuit composed in parallel, the signal output part OUT of wave filter passes through this
Feed circuit K2 is connected with resonator N.It should be noted that output feed circuit K2 also has capacitive coupling, it is inductive coupled, and hold
Three kinds of feed forms of sexuality hybrid coupled.As shown in FIG. 1A and 1B, resonator N passes through the output feed circuit K2 and filtering
The signal output part OUT of device is connected.
The application is described by taking the wave filter including 6 resonators as an example below, Fig. 2A is the circuit of the wave filter
Figure, in the circuit diagram, the short at one end of resonator, the other end passes through capacity earth.Fig. 2 B are the planar structure of the wave filter
Figure, Fig. 2 C are the three-dimensional structure diagram of the wave filter.Wave filter typically all includes upper-layer micro-strip structure, intermediate medium substrate and bottom
Metal base plate, Fig. 2 B show the filter construction model built on medium substrate, as shown in fig. 2 b and fig. 2 c, wave filter by
Transmission line 1 is inputted, input coupling electric capacity 2 exports transmission line 13, the resonator 3 of output coupling capacitor 12, resonator 7, resonator
8, resonator 9, resonator 10, totally 6 resonators are constituted resonator 11.
The input for inputting transmission line 1 is the signal input part of wave filter, inputs the output end of transmission line 1 by inputting coupling
Electric capacity 2 is closed with resonator 3 to be connected.It should be noted that input coupling electric capacity 2 herein can play the work of input feed circuit
With.Resonator in the application includes resonant rod and ground hole, and resonant rod is arranged on the surface of the medium substrate of wave filter, passed through
The back side connection of ground hole and medium substrate.Such as resonator 3, including resonant rod 4 and ground hole 5, as shown in Figure 2 B, resonant rod 4
The surface of medium substrate is arranged on, is connected by ground hole 5 with the back side of medium substrate.
In addition, though between the resonator 7 of resonator 3 shown in Fig. 2 B and Fig. 2 C, between the resonator 9 of resonator 8,
It is that distance between ungrounded nose end is smaller between the resonator 11 of resonator 10, i.e., the distance between open end is less than ground connection
The distance between nose end, but in practical operation, not to the distance between open end of two resonators and ground connection nose end it
Between distance make specific limit or the distance between open end is more than the distance between ground connection nose end or opened
The distance between terminal is equal to ground connection the distance between nose end, as long as by the side of hybrid coupled between meeting adjacent resonator
When formula is connected, transmission zero can be produced between the signal input part and signal output part of wave filter.Such as Fig. 2 B and figure
Shown in 2C, resonator 3 is connected by way of hybrid coupled with resonator 7；Resonator 7 passes through the coupling side based on inductive coupled
Formula is connected with resonator 8, and the resonator 9 of resonator 8 is connected by way of hybrid coupled；Resonator 9 is by inductive coupled
Main coupled modes are connected with resonator 10, and the resonator 11 of resonator 10 is connected by way of hybrid coupled；Resonator 11
It is connected through output coupling capacitor 12 with output transmission line 13.Between the resonator 7 of resonator 3, between the resonator 9 of resonator 8,
Connection circuit equivalent between the resonator 11 of resonator 10 passes through in the circuit being made up of inductive element and/or capacitive element
The mutual cooperation of these circuit resonators so that presented between resonator it is inductive coupled based on or capacitive coupling based on, enter
And the frequency of circuit is located at the high-end or/and low side of filter passband, so that the high-end or/and low side in filter passband is produced
Raw transmission zero, to filter passband outside frequency play inhibitory action, improve the rectangular degree of wave filter.
To sum up, many transmission zero wave filters that the application is provided transmit road in the signal of signal input part to signal output part
Set on footpath realizes height by way of hybrid coupled between at least three resonators, and at least two pairs adjacent resonators
End resistance band, with multiple transmission zeros, while the rectangular degree of wave filter is effectively improved, need not increase extra add again
Coupled structure, greatly reduces the volume of wave filter.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the division of unit,
It is only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can be with
With reference to or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or discussed
Coupling each other or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of device or unit or
Communication connection, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be physically separate, be shown as unit
Part can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple networks
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in the utility model each embodiment can be integrated in a processing unit,
Can be that unit is individually handled, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are to cause a computer
Equipment (can be personal computer, server, or network equipment etc.) performs the portion of each embodiment method of the utility model
Step by step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-Only Memory, abbreviation
ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various to store
The medium of program code.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from each embodiment technology of the utility model
The spirit and scope of scheme.
Claims (10)
1. a kind of many transmission zero wave filters, it is characterised in that including：
From the signal input part of the wave filter to the signal transmission path of signal output part；
At least three resonators set along the signal transmission path, wherein, at least two pairs adjacent resonators
Between be connected with each other in hybrid coupled mode, for producing at least two between the signal input part and the signal output part
Individual transmission zero.
2. many transmission zero wave filters according to claim 1, it is characterised in that the resonator includes resonant rod and connect
Ground hole, the resonant rod is arranged on the surface of the medium substrate of the wave filter, passes through the ground hole and the medium substrate
The back side connection.
3. many transmission zero wave filters according to claim 1, it is characterised in that at least two pairs adjacent resonance
It is connected with each other specially in hybrid coupled mode between device：
Connection circuit equivalent between the adjacent resonator is in the termination power being made up of capacitive element and inductive element.
4. many transmission zero wave filters according to claim 1, it is characterised in that at least two pairs are connected in hybrid coupled mode
Be between the adjacent resonators connect it is inductive coupled based on hybrid coupled mode.
5. many transmission zero wave filters according to claim 1, it is characterised in that at least two pairs are connected in hybrid coupled mode
It is the hybrid coupled mode based on capacitive coupling between the adjacent resonators connect.
6. many transmission zero wave filters according to claim 1, it is characterised in that the short at one end of the resonator, separately
One end passes through capacity earth.
7. many transmission zero wave filters according to claim 1, it is characterised in that the side of the signal input part is set
There is input feed circuit.
8. many transmission zero wave filters according to claim 7, it is characterised in that the resonator is presented by the input
Circuit is connected with the signal input part.
9. many transmission zero wave filters according to claim 2, it is characterised in that the side of the signal output part is set
There is output feed circuit.
10. many transmission zero wave filters according to claim 9, it is characterised in that the resonator passes through the output
Feed circuit is connected with the signal output part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710077122 | 2017-02-13 | ||
| CN2017100771224 | 2017-02-13 |
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| CN206461069U true CN206461069U (en) | 2017-09-01 |
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| CN201710109146.3A Pending CN106816674A (en) | 2017-02-13 | 2017-02-27 | A kind of many transmission zero wave filters |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106816674A (en) * | 2017-02-13 | 2017-06-09 | 石家庄创天电子科技有限公司 | A kind of many transmission zero wave filters |
| CN109510604A (en) * | 2018-11-13 | 2019-03-22 | 上海艾为电子技术股份有限公司 | A kind of filter circuit applied to radio-frequency front-end |
| WO2021035805A1 (en) * | 2019-08-27 | 2021-03-04 | 京信通信技术(广州)有限公司 | Filter and filter loop structure thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658532A (en) * | 2017-10-23 | 2018-02-02 | 石家庄创天电子科技有限公司 | Wave filter |
| CN109346805A (en) * | 2018-08-29 | 2019-02-15 | 中国电子科技集团公司第二十九研究所 | A kind of extraction zero point microstrip filter |
| CN110350884A (en) * | 2019-08-07 | 2019-10-18 | 安徽安努奇科技有限公司 | More transmission zero circuits |
| CN113037239B (en) * | 2021-02-23 | 2024-06-18 | 安徽安努奇科技有限公司 | Filter and electronic device |
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| DE69426283T2 (en) * | 1993-08-24 | 2001-03-15 | Matsushita Electric Industrial Co., Ltd. | Layered antenna switch and dielectric filter |
| CN101599568B (en) * | 2009-07-09 | 2013-07-10 | 北京大学 | Band-pass filter capable of suppressing second harmonic |
| CN201450087U (en) * | 2009-07-09 | 2010-05-05 | 华南理工大学 | Controllable Electromagnetic Coupling Microstrip Split Ring Resonator Filter |
| CN102544654B (en) * | 2012-02-28 | 2014-10-29 | 中国科学院微电子研究所 | Varactor electrically-adjustable microstrip filter |
| CN103326091B (en) * | 2013-06-20 | 2015-07-29 | 南京航空航天大学 | The stepped impedance pectinate line balance microstrip bandpass filter of a kind of high selectivity, high common mode inhibition |
| CN103594762B (en) * | 2013-11-22 | 2015-11-11 | 东南大学 | A kind of controlled hybrid electromagnetic coupling filter |
| CN105514545B (en) * | 2016-01-19 | 2018-04-17 | 南京航空航天大学 | A kind of compact Wide stop bands high selectivity microstrip filter |
| CN206461069U (en) * | 2017-02-13 | 2017-09-01 | 石家庄创天电子科技有限公司 | A kind of many transmission zero wave filters |
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2017
- 2017-02-27 CN CN201720180887.6U patent/CN206461069U/en active Active
- 2017-02-27 CN CN201710109146.3A patent/CN106816674A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106816674A (en) * | 2017-02-13 | 2017-06-09 | 石家庄创天电子科技有限公司 | A kind of many transmission zero wave filters |
| CN109510604A (en) * | 2018-11-13 | 2019-03-22 | 上海艾为电子技术股份有限公司 | A kind of filter circuit applied to radio-frequency front-end |
| CN109510604B (en) * | 2018-11-13 | 2023-10-13 | 上海艾为电子技术股份有限公司 | Filter circuit applied to radio frequency front end |
| WO2021035805A1 (en) * | 2019-08-27 | 2021-03-04 | 京信通信技术(广州)有限公司 | Filter and filter loop structure thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106816674A (en) | 2017-06-09 |
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