JPH098542A - Dielectric resonator antenna - Google Patents

Abstract

PURPOSE: To provide the dielectric resonator antenna formed on a same plane in the dielectric resonator antenna used for a mobile communication radio terminal equipment mainly in a micro wave and a millimeter wave. CONSTITUTION: A dielectric guide path 2 is provided to a side face of a dielectric resonator 1, power is fed through the dielectric guide path 2 to excite the dielectric resonator 1. The dielectric resonator antenna is resonated to emit an electromagnetic field and acts like a radiation element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric resonator antenna mainly used for mobile communication wireless terminals in the microwave and millimeter wave bands.

[0002]

2. Description of the Related Art Conventionally, as a structure of a dielectric resonator antenna, for example, "EYE Transaction Antenna and Propagation 10" {(1993
Year) 1390 to 1398 (KWLeung, KMLu
k and KYALai, "Theory and Experiment of a Coaxtia
l Probe Fed Hemispherical Dielectric Resonator Ant
enna ", IEEE Trans. Antennas Propagation, vol.41, pp.1
390-1398, Oct 1993)} is known.

In FIG. 14, reference numeral 91 is a dielectric resonator serving as a radiating element, 92 is a coaxial line for feeding power, 93 is a feed pin connected to the center conductor of the coaxial line 92 for exciting the dielectric resonator 91, and 94. Is a ground board.

[0004]

In the conventional dielectric resonator antenna, it is necessary to feed power from the back surface of the substrate through the coaxial line 92, and it is difficult to form the antenna on the same plane as the feeding circuit. Had the problem of being. Further, there is a problem that the frequency cannot be adjusted.

The present invention is to solve the above-mentioned problems, and a dielectric resonator antenna capable of forming a feeding circuit on the same plane,
Another object of the present invention is to provide a dielectric resonator antenna whose frequency can be adjusted as needed.

[0006]

In order to achieve this object, a dielectric resonator and a dielectric waveguide for feeding the dielectric resonator are provided.

Further, the dielectric resonator has a screw hole and a screw connected to the feeding coaxial line.

[0008]

With the above structure, the present invention can realize a dielectric resonator antenna that can be formed on the same plane. Also,
It is possible to realize a dielectric resonator antenna whose frequency can be adjusted as needed.

[0009]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a dielectric resonator antenna according to the first embodiment of the present invention, FIG.
FIG. 4 is a cross-sectional view of the same dielectric resonator antenna.

In FIGS. 1 and 2A, reference numeral 1 is a hemispherical dielectric resonator. Reference numeral 2 is a dielectric waveguide in which a dielectric is covered with a metal and is formed by an outer conductor 4 and an inner dielectric 5. Reference numeral 3 is a metal substrate on which the dielectric resonator 1 is mounted.

The dielectric resonator antenna configured as described above is fed by the dielectric waveguide 2 connected to the side surface which is flush with the dielectric resonator 1, and the dielectric resonator 1
To excite. The dielectric resonator 1 resonates at TE111 and can be operated as a radiating element. According to this configuration, the dielectric resonator 1 is a power supply circuit including a dielectric waveguide 2
Can be formed on the same plane.

As shown in the transverse sectional view of FIG. 2B, the dielectric resonator 1 is provided with a groove into which the dielectric waveguide 2 is fitted, so that the fitting can be released and FIG. As in c), the outer conductor 4 at the tip of the dielectric waveguide 2 can be removed and re-fitted, and the matching state of the dielectric waveguide 2 and the dielectric resonator 1 can be adjusted.

Further, as shown in FIG. 3, by providing a metal layer 6 having the same size as the bottom surface of the dielectric resonator 1 in place of the metal substrate 3, the metal substrate 3 becomes unnecessary.

Further, as shown in FIG. 4, a dielectric waveguide 7 is provided at a position of the dielectric resonator 1 which is orthogonal to the longitudinal direction of the dielectric waveguide 2, and the dielectric waveguide 2 and the dielectric waveguide 7 are connected to each other. By feeding power to the resonator 1, orthogonal modes can be excited to form a circularly polarized antenna.

As described above, according to this embodiment, by providing the dielectric waveguide 2 on the side surface of the dielectric resonator 1, the dielectric resonator antenna which can be formed on the same plane as the power feeding circuit is provided. Realization becomes possible.

Although a hemispherical dielectric resonator is used as the dielectric resonator 1 in this embodiment, a cylindrical, annular, semicylindrical, or cubic dielectric resonator may be used.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. FIG. 5 is a perspective view of a dielectric resonator antenna according to the second embodiment of the present invention, and FIG. 6A is a cross-sectional view of the dielectric resonator antenna.

In FIGS. 5 and 6A, 11 is a spherical dielectric resonator, 12 is a dielectric waveguide in which a dielectric is covered with metal, 13 is an outer conductor of the dielectric waveguide 12, and 14 is a dielectric. The internal dielectric of the waveguide 12 is different from that of the first embodiment shown in FIGS. 1 and 2A in that the dielectric resonator is a hemisphere in the first embodiment. The resonator is a sphere and the metal substrate 3 used in the first embodiment is omitted.

The dielectric resonator antenna configured as described above feeds power through the dielectric waveguide 12 connected to the side surface of the dielectric resonator 11 to excite the dielectric resonator 11. The dielectric resonator 11 can be excited, emits an electromagnetic field, and can be operated as a radiating element. According to the configuration, the dielectric resonator 11 is on the same plane as the dielectric waveguide 12 that is a power feeding circuit. Can be formed.

By providing the dielectric resonator 11 with a groove into which the dielectric waveguide 12 is fitted, as shown in the cross-sectional view of FIG. 6B, the fitting can be released and FIG. As in c), the outer conductor 13 at the tip portion of the dielectric waveguide 12 can be removed and re-fitted, and the matching state of the dielectric waveguide 12 and the dielectric resonator 11 can be adjusted.

Further, as shown in FIG. 6D, the dielectric waveguide 12 and the dielectric resonator 11 may be formed of the same material.

Similar to the concept shown in FIG. 4, as shown in FIG. 7, a dielectric waveguide 15 may be provided to excite orthogonal modes to radiate circularly polarized waves.

The dielectric resonator 11 may have a cylindrical shape or a cubic shape. As described above, according to the present embodiment, the dielectric resonator 11 is fed by the dielectric waveguide 12, so that the feeding and the supporting of the radiating element are simultaneously performed, and the metal substrate 3 is not required. Can be realized.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings. FIG. 8 is a perspective view of a dielectric resonator antenna according to a third embodiment of the present invention, and FIG.
(A) is a cross-sectional view of the same dielectric resonator antenna.

In FIGS. 8 and 9A, 21a and 21a are provided.
b is a hemispherical dielectric resonator. 22a, 22b, 2
Reference numeral 2c is a dielectric waveguide in which a dielectric for connecting the dielectric resonator 21 and supplying electric power is covered with a metal, and is formed by outer conductors 23a, 23b and inner dielectrics 24a, 24b. Reference numeral 25 is a metal substrate on which the dielectric resonators 21a and 21b are mounted.

In the dielectric resonator antenna configured as described above, the dielectric waveguide 22a includes the dielectric resonator 21.
Power is supplied from the side surface of a, and the dielectric resonator 21a resonates at TE111. The dielectric waveguide 22b extracts a signal from the side surface of the resonating dielectric resonator 21a and supplies the signal to the dielectric resonator 21b to excite the dielectric resonator 21b. Then, the dielectric waveguide 22c takes out a signal from the excited dielectric resonator 21b and obtains an output, or transmits it to the next dielectric resonator (not shown) as necessary.

As shown in the cross-sectional view of FIG. 8B, the dielectric resonator 21 is provided with a groove into which the dielectric waveguide 22 is fitted, so that the fitting can be released and FIG. As in c), the outer conductor 23 at the tip portion of the dielectric waveguide 22 can be removed and refitted, and the matching state of the dielectric waveguide 22 and the dielectric resonator 21 can be adjusted.

Further, as the dielectric resonator, a cylindrical, semi-cylindrical or cubic dielectric resonator may be used.

Further, instead of the metal substrate 25, a metal layer may be formed on the bottom surface of each dielectric resonator 21 as shown in FIG.

As described above, according to this embodiment, by providing the dielectric waveguide that connects the dielectric resonators, it is possible to realize the dielectric resonator antenna that can be formed on the same plane.

(Embodiment 4) A fourth embodiment of the present invention will be described below with reference to the drawings. FIG. 10 is a plan view of a dielectric resonator antenna according to the fourth embodiment of the present invention.

In FIG. 10, 31a, 31b, 31
c and 31d are hemispherical dielectric resonators, 32a and 32b,
Reference numerals 33a, 33b, 34a, 34b, 34c and 34d denote dielectric waveguides in which a dielectric is covered with metal, 35a and 35b denote power feeding circuits for feeding power to the dielectric waveguide 34, and 36 denotes a dielectric resonator 31 mounted thereon. It is a metal substrate.

The operation of the dielectric resonator antenna configured as described above will be described below.

First, the feeder circuit 35a excites the dielectric resonators 31a, 31b, 31c and 31d in the lateral direction in the figure through the dielectric waveguides 32a, 32b, 34b, 34c, 34e and 34f.

On the other hand, the feeder circuit 35b excites the dielectric resonators 31a, 31b, 31c, 31d in the vertical direction in the figure through the dielectric waveguides 33a, 33b, 34a, 34d, 34g, 34h. Circularly polarized waves can be radiated by exciting the orthogonal modes of all the dielectric resonators 31a, 31b, 31c, 31d.

As described above, according to this embodiment, the dielectric waveguides 32a, 32b, 34b, 34c, 34e, 3 which connect the dielectric resonators 31a, 31b, 31c, 31d.
4f is provided and the orthogonal modes are set to the power feeding circuits 35a and 35b.
By exciting with, it becomes possible to realize a circularly polarized dielectric resonator antenna that can be formed on the same plane.

(Fifth Embodiment) A fifth embodiment of the present invention will be described below with reference to the drawings. FIG. 11 is a perspective view of the dielectric resonator antenna of the fifth embodiment of the present invention.

In FIG. 11, 41 is a dielectric waveguide in which a dielectric is covered with metal, and 42a and 42b are dielectric waveguides 41.
Dielectric resonator having a groove penetrated while fitting
3ab is a feeding slot provided in the dielectric waveguide 41, and 44 is a metal substrate on which the dielectric resonators 42a and 42b are mounted.

In the dielectric resonator antenna configured as described above, the signal propagating through the dielectric waveguide 41 is taken out from the feeding slots 43a and 43b, and the dielectric resonator 42 is used.
Excite a and 42b. The dielectric resonators 42a and 42b resonate and radiate an electromagnetic field and can operate as a radiating element.

As described above, according to this embodiment, by providing the dielectric waveguide 41 that connects the dielectric resonators 42a and 42b, it is possible to realize a dielectric resonator antenna that can be formed on the same plane. It will be possible.

(Embodiment 6) A sixth embodiment of the present invention will be described below with reference to the drawings. 12A is an exploded perspective view of a dielectric resonator antenna according to a sixth embodiment of the present invention, and FIG. 12B is a transverse sectional view of the same.

In FIG. 12, reference numeral 51 is a hemispherical dielectric resonator, 52 is a screw hole in a cavity provided in the body of the dielectric resonator 51, and 53 is a power feeding circuit electrically connected to a box of a power feeding circuit 54. The screw for use, 55 is a metal layer provided between the dielectric resonator 51 and the feeding circuit 54.

The operation of the dielectric resonator antenna configured as described above will be described below.

The dielectric resonator 51 is supported by the screw 53 that is passed through the screw hole 52. Screw 5 from the power supply circuit 54
Power is supplied to the dielectric resonator 51 through
1 resonates and radiates an electromagnetic field. Screw 53 to power supply circuit 5
By adjusting from the back surface of No. 4, the length of the screw 53 in the dielectric resonator 51 changes, and the resonance frequency and the input impedance of the dielectric resonator 51 change, so that the resonance condition can be adjusted. it can.

As shown in FIG. 13, in addition to the screw hole 52 and the power feeding screw 53, a screw hole 56 and a power feeding screw 5 are further provided.
Circularly polarized waves may be radiated by providing 7 at a position where an orthogonal mode is excited.

As described above, according to the present embodiment, it is possible to realize a dielectric resonator antenna capable of adjusting and supporting resonance conditions by providing a screw hole in the dielectric resonator and feeding power with a screw. To

[0047]

As described above, the present invention makes it possible to realize a dielectric resonator antenna that can be formed on the same plane as the power feeding circuit by feeding power to the dielectric resonator through the dielectric waveguide.

Further, by feeding power to the dielectric resonator through the dielectric waveguide, it is possible to realize a dielectric resonator antenna that simultaneously feeds power and supports the radiation element and does not require a metal substrate.

Further, by providing a dielectric waveguide for connecting the dielectric resonators, it is possible to realize a dielectric resonator array antenna that can be formed on the same plane.

Further, by providing a dielectric waveguide for connecting the dielectric resonators and exciting orthogonal modes, it is possible to realize a circularly polarized dielectric resonator array antenna that can be formed on the same plane. To do.

Further, by providing a screw hole in the dielectric resonator and feeding power with the screw, it is possible to realize a dielectric resonator antenna capable of adjusting and supporting the resonance condition.

[Brief description of drawings]

FIG. 1 is a perspective view of a dielectric resonator antenna according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a dielectric resonator antenna according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a dielectric resonator antenna according to a first another embodiment of the present invention.

FIG. 4 is a perspective view of a dielectric resonator antenna according to a first embodiment of the present invention.

FIG. 5 is a perspective view of a dielectric resonator antenna according to a second embodiment of the present invention.

FIG. 6 is a sectional view of a dielectric resonator antenna according to a second embodiment of the present invention.

FIG. 7 is a perspective view of a dielectric resonator antenna according to a second embodiment of the present invention.

FIG. 8 is a perspective view of a dielectric resonator antenna according to a third embodiment of the present invention.

FIG. 9 is a sectional view of a dielectric resonator array antenna according to a third embodiment of the present invention.

FIG. 10 is a plan view of a dielectric resonator array antenna according to a fourth embodiment of the present invention.

FIG. 11 is a perspective view of a dielectric resonator antenna according to a fifth embodiment of the present invention.

FIG. 12 is an exploded perspective view and a sectional view of a dielectric resonator antenna according to a sixth embodiment of the present invention.

FIG. 13 is an exploded perspective view of a dielectric resonator antenna according to a sixth embodiment of the present invention.

FIG. 14 is a cross-sectional view of a conventional dielectric resonator antenna.

[Description of Reference Signs] 1 dielectric resonator 2 dielectric waveguide 7 dielectric waveguide 11 dielectric resonator 12 dielectric waveguide 15 dielectric waveguide 21 dielectric resonator 22 dielectric waveguide 31 dielectric resonator 32 Dielectric Waveguide 33 Dielectric Waveguide 34 Dielectric Waveguide 41 Dielectric Waveguide 42 Dielectric Resonator 51 Dielectric Resonator 52 Screw Hole 53 Feed Screw 91 Dielectric Resonator 92 Coaxial Line 93 Feed Pin 94 Metal substrate

Claims (14)

[Claims] 1. A dielectric resonator antenna comprising: a dielectric resonator; and one or a plurality of dielectric waveguides in which a dielectric for feeding power to the dielectric resonator is covered with a metal. 2. The dielectric resonator antenna according to claim 1, wherein the dielectric resonator has a groove that fits into the dielectric waveguide. 3. The dielectric resonator antenna according to claim 2, further comprising a dielectric waveguide in which a metal layer at a tip portion to be fitted into a groove of the dielectric resonator is removed. 4. The dielectric resonator antenna according to claim 1, further comprising a dielectric resonator supported by the dielectric waveguide. 5. The dielectric resonator antenna according to claim 4, further comprising a dielectric waveguide and a dielectric resonator formed of a material having the same dielectric constant as that of the dielectric waveguide. 6. A metal substrate, a hemispherical dielectric resonator on the metal substrate, and one or a plurality of dielectric waveguides feeding a curved surface of the dielectric resonator. The dielectric resonator antenna according to claim 1. 7. A first dielectric resonator, a first dielectric waveguide feeding the first dielectric resonator, and a plurality of second dielectric resonators.
And a second dielectric waveguide connecting the first and second dielectric resonators with each other. 8. The dielectric resonator antenna according to claim 7, wherein the dielectric resonator includes a groove that fits into the dielectric waveguide. 9. The dielectric resonator antenna according to claim 8, further comprising a dielectric waveguide in which a metal layer at a tip portion to be fitted into the dielectric resonator is removed. 10. A dielectric resonator antenna comprising: a dielectric waveguide; a feeding means formed on the dielectric waveguide; and a dielectric resonator fed by the feeding means. 11. The dielectric resonator antenna according to claim 10, wherein the dielectric resonator includes a groove that penetrates the dielectric waveguide. 12. A dielectric resonator antenna according to claim 11, wherein the metal layer of the dielectric waveguide is provided with a feeding means by a slot. 13. A power feeding circuit, a screw made of metal connected to the power feeding circuit, and one or more screw holes through which the screw is passed, the screw being fixed by the screw and fed through the screw. A dielectric resonator antenna comprising a body resonator. 14. The dielectric resonator antenna according to claim 13, further comprising a metal layer formed on a bottom surface of the dielectric resonator.