JPH07336101A - Tm multiplex mode dielectric resonator device - Google Patents

Abstract

PURPOSE:To provide a TM multiplex mode dielectric resonator device by which frequency adjustment and also, a of resonance frequency can singly be adjusted independently of a coupling coefficient. CONSTITUTION:Composite dielectric poles 10a, 10b formed in shape intersecting two dielectric poles are arranged so that a plane formed by each of the composite dielectric poles can be almost flush, and dielectric bars 19a, 20a, 19b and 20b are inserted/extracted along with a direction almost perpendicular to the planes formed by the composite dielectric poles, and also, members 23a, 23b for coupling adjustment are inserted/extracted. Simultaneously, two parallel dielectric poles 12a, 12b out of the two composite dielectric poles are magnetically coupled via windows 30a, 30b for magnetic coupling. In this way, since all the members for frequency adjustment can be inserted/extracted in the same direction, frequency adjusting work can be easily performed, and the adjustment of the resonance frequency can be performed independently of the resonance frequency of another resonator or the coupling coefficient of another resonator even when the members are inserted/extracted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a TM multimode dielectric resonator device having a composite dielectric pillar having a shape in which at least two dielectric pillars are crossed in a space surrounded by an outer conductor. Regarding

[0002]

2. Description of the Related Art In order to miniaturize a dielectric resonator using a TM mode such as TM ₁₁₀ mode, a plurality of TM multimode dielectric resonators are formed in the same space surrounded by an outer conductor. Along with T
An M multimode dielectric resonator device is used as a filter or the like.

The structure of a conventional TM multimode dielectric resonator device of this type is shown in FIGS.

FIG. 6 is a perspective view showing the arrangement of two TM dual mode dielectric resonators. In FIG. 6, 10a, 10
Reference numeral b is a composite dielectric pillar formed by intersecting two dielectric pillars, and frequency adjusting holes 13a, 14a, 13b, and 14b are provided respectively. The composite dielectric columns 10a and 10b are integrally formed with the cavities 15a and 15b having outer conductors formed on the outer surfaces thereof. The cavities 15a and 15b are provided with holes 41a, 42a, 41b and 42b for holding the frequency adjusting member in a removable manner with respect to the frequency adjusting holes provided in the composite dielectric column. The frequency of the resonator is adjusted by each dielectric pillar by inserting and removing the member for use. Further, the cavities 15a and 15b are provided with holes 43a for holding the coupling adjusting member so that the coupling adjusting member can be inserted into and removed from the cavity.
43b is provided, and coupling adjustment between the resonators by each dielectric pillar is performed by inserting and removing the coupling adjustment member from these holes. In the figure, reference numeral 44 denotes a partition plate arranged between two TM double mode dielectric resonators, and selectively transmits only a magnetic field component in a predetermined direction between the two TM double mode dielectric resonators.

FIG. 7 is a plan view showing the structure of one of the two TM dual mode dielectric resonators shown in FIG. 6, (A) being a top view and (B) being a front view. is there. In FIG. 7, 19 and 20 are dielectric rods, and 17 and 18 are dielectric rods 1.
It is a screw member integrated with 9, 20. Cavity 1
5, bushings 21 and 22 are provided, and screw members 17 and 18 are screwed together at this portion. Further, in the figure, reference numeral 23 is a coupling adjusting member, and a bushing 24 is provided in the cavity 15, and the coupling adjusting member 23 is screwed in this portion.

[0006]

SUMMARY OF THE INVENTION Such a conventional TM
In the multimode dielectric resonator device, since the frequency adjusting member is inserted into and removed from the composite dielectric column in two directions to adjust the resonance frequency of each resonator, the adjustment work is not easy. Further, if the influence of the frequency adjusting member on the even mode and the odd mode created by the two resonators is different, the resonance frequency is changed by inserting / removing the frequency adjusting member, and the resonator and other resonances intersecting with it The coupling coefficient between units will also change.

It is an object of the present invention to provide a TM multimode dielectric resonator device which facilitates frequency adjustment and allows the resonance frequency to be adjusted independently of the coupling coefficient.

[0008]

According to a first aspect of the present invention, there is provided a TM multimode dielectric resonator device comprising a composite dielectric pillar having a shape in which at least two dielectric pillars are crossed,
In a TM multimode dielectric resonator device provided in a space surrounded by an outer conductor, a frequency adjustment is performed on the two dielectric columns along a direction substantially perpendicular to a plane formed by the two dielectric columns. A hole is formed, and the frequency adjusting member is provided so as to be freely inserted into and removed from the frequency adjusting hole.

According to a second aspect of the present invention, there is provided the TM multimode dielectric resonator device according to the first aspect, wherein the coupling adjusting member can be inserted into and removed from the space in the same direction as the frequency adjusting member is inserted and removed. It is characterized by being provided in.

According to a third aspect of the present invention, there is provided a TM multimode dielectric resonator device according to the first or second aspect, wherein the planes formed by the composite dielectric columns are substantially the same plane. It is characterized by arranging pillars.

According to a fourth aspect of the present invention, there is provided a TM multi-mode dielectric resonator device according to the third aspect, wherein two dielectric dielectric columns which are parallel to each other are provided between the two composite dielectric columns. It is characterized in that a magnetic field coupling window is formed to selectively magnetically couple body pillars or two dielectric pillars arranged in the same axial direction.

[0012]

In the TM multimode dielectric resonator device according to claim 1 of the present invention, each dielectric pillar of the composite dielectric pillar acts as a TM mode dielectric resonator in the space surrounded by the outer conductor. The frequency adjusting member is inserted into and removed from the frequency adjusting hole formed along the direction substantially perpendicular to the plane formed by the two dielectric columns forming the composite dielectric column. The resonance frequency of each of the dielectric columns is set. At that time, since any frequency adjusting member is inserted and removed in the same direction, the frequency adjusting work becomes easy. Further, since each frequency adjusting member is located in a direction substantially perpendicular to the plane formed by the two dielectric columns,
The influence on the resonance frequency of other resonators and the coupling coefficient with other resonators is small, and the resonance frequency is adjusted independently of the resonance frequency of other resonators and the coupling coefficient with other resonators even by inserting and removing it. It can be performed.

In the TM multi-mode dielectric resonator device according to the second aspect of the present invention, since the coupling adjusting member is detachably provided in the same direction as the inserting and removing direction of the frequency adjusting member, the coupling adjusting work is performed together with the frequency adjusting work. Will also be easier.

In the TM multimode dielectric resonator device according to a third aspect of the present invention, since the plurality of composite dielectric columns are arranged such that the planes formed by the composite dielectric columns are substantially the same plane, Resonant frequencies of all the resonators are adjusted by inserting / removing each frequency adjusting member, and each composite dielectric pillar is formed by inserting / extracting the coupling adjusting member from the same direction as the inserting / extracting direction of the frequency adjusting member. The coupling coefficient between the two resonators can be adjusted respectively.

In the TM multimode dielectric resonator device according to the fourth aspect, two of the two composite dielectric columns that are parallel to each other are used.
One dielectric pillar or two dielectric pillars arranged in the same axial direction are selectively magnetically coupled to each other through the magnetic field coupling window. As a result, it functions as a multistage resonator device using a plurality of composite dielectric columns.

[0016]

1 and 2 show the structure of a TM multimode dielectric resonator device according to a first embodiment of the present invention.

FIG. 1 is an exploded perspective view of a TM multimode dielectric resonator device which constitutes one unit.

In FIG. 1, 10 is two dielectric columns 11,
It is a composite dielectric pillar having a shape in which 12 are crossed, and has frequency adjusting holes 13 and 14, respectively. The composite dielectric pillar 10 is integrally molded with the cavity 15. An outer conductor is formed on four side surfaces of the cavity 15. By joining the upper plate 16 and the lower plate 25 having the outer conductor formed to the two openings of the cavity 15, a space surrounded by the outer conductor is formed. Bushings 21, 22 and 24 are attached to the upper plate 16, screw members 17 and 18 which are a part of the frequency adjusting member are screwed into the bushings 21 and 22, and the coupling adjusting member 23 is a bushing. It is screwed to 24.

FIG. 2 is a front view of the TM multimode dielectric resonator device shown in FIG. However, the composite dielectric pillar and the cavity portion are shown as a sectional view in the central portion thereof. In this state, the upper plate 16 and the lower plate 25 are joined to the cavity 15 and the outer conductors are electrically connected to each other, so that the TM double mode in which the periphery of the composite dielectric pillar 10 is surrounded by the outer conductor. Construct a dielectric resonator device. As shown in the figure, the bushing 2 provided on the upper plate 16
Dielectric rods 19 and 20 are provided at the tips of the screw members 17 and 18 that are screwed into the screws 1 and 22, respectively. This dielectric rod 19,2
0 is inserted into the frequency adjusting holes 13 and 14. Therefore, by rotating the screw members 17 and 18 in a predetermined direction, the dielectric rods 19 and
20 will be inserted and removed. Also, the coupling adjusting member 2
By rotating 3 in a predetermined direction, the coupling adjusting member is inserted into and removed from the space. By inserting / removing this coupling adjusting member, the resonance space changes, and the resonance frequency of the even mode or the odd mode changes. This adjusts the coupling coefficient between the two resonators.

1 and 2, although the signal input / output member for inputting / outputting signals by combining with a predetermined dielectric pillar among the composite dielectric pillars is omitted, for example, on the outer surface of the lower plate 25. Signals can be input and output by attaching a coaxial connector, providing a coupling loop connected to the center conductor of the coaxial connector in the space, and magnetically coupling with a predetermined dielectric pillar.

Next, a TM according to a second embodiment of the present invention
The structure of the multimode dielectric resonator device is shown in FIGS.

FIG. 3 shows a resonator device in which two one-unit resonator devices shown in FIG. 1 are arranged. In FIG. 3, only a composite dielectric pillar and a cavity portion integrally formed with it are shown. There is. In FIG. 3, 10a and 10b are composite dielectric columns each having a shape in which two dielectric columns are crossed, and frequency adjusting holes 13a and 14 are provided, respectively.
a, 13b, 14b are formed. Cavity 15a integrally formed with this composite dielectric pillar 10a and cavity 15 integrally formed with this composite dielectric pillar 10b.
An outer conductor is formed on at least four side surfaces of b. Magnetic field coupling windows 30a and 30b are formed in parts of the cavities 15a and 15b. This portion is an opening provided in a part of the side surface of the cavity, and since there is no outer conductor in this portion, the two composite dielectric columns 10a,
Two parallel dielectric columns of 10b are magnetically coupled to each other.

FIG. 4 is a top view and a cross-sectional view of the TM multimode dielectric resonator device with the upper plate and the lower plate joined together. In FIG. 4, (A) is a partially cut-away top view, and the bushings 21a, 22a, 24 are attached to the upper plate 16a as in the case shown in FIGS. 1 and 2 as the first embodiment.
a is provided, and the bushings 21b, 22b, 2 are provided on the upper plate 16b.
4b is provided. The bushings 24a, 24b have a first
Similar to the case shown in the embodiment of FIG.
23b are screwed together. FIG. 4B is a vertical cross-sectional view of the XX portion in FIG. Dielectric rods 19a and 20a are provided at the tip ends of the screw members 17a and 18a, respectively, to form frequency adjusting members. The bushings 21a, 22a have screw members 17a, 1
8a are screwed together. As a result, the screw member 1
By rotating 7a and 18a in a predetermined direction, the dielectric rod 19
The composite dielectric columns 10a of a and 20a are inserted and removed.
Similarly, dielectric rods 19b and 20b are provided at the tips of the screw members 17b and 18b, respectively.
Are respectively screwed into the bushings 21b and 22b. As a result, by rotating the screw members 17b and 18b in a predetermined direction, the composite dielectric columns 1 of the dielectric rods 19b and 20b are formed.
Insert / extract from 0b. As shown in FIG.
The two cavities 15a and 15b are joined by soldering metallic seal plates 31 and 32 between them, and also electrically connect the outer conductors. However, since there is no outer conductor in the magnetic field coupling windows 30a and 30b,
Two parallel dielectric columns of the two composite dielectric columns are magnetically coupled to each other through this portion.

Here, FIG. 5 shows a method of coupling through the magnetic field coupling window. In FIG. 5, arrows indicate electric fields and broken lines indicate coupling magnetic fields. Thus, the dielectric columns 12a and 1
2b is magnetically coupled via the magnetic field coupling windows 30a and 30b. Further, as shown in the figure, since the grooves Ga and Gb are formed at the intersecting portions of the dielectric columns that form the composite dielectric column, the even-mode and odd-mode resonances formed by the two intersecting dielectric columns are formed. The frequency changes, which causes the dielectric columns 11
between the two resonators a and 12a and the dielectric pillar 11b
The two resonators 12 and 12b are coupled with a constant coupling coefficient.

Returning to FIG. 4, the lower plates 25a and 25b have coaxial connectors 33a and 33b and a coupling loop 3 respectively.
4a and 34b are provided. This allows the coupling loop 34
a and 34b are magnetically coupled to the dielectric columns 11a and 11b, respectively. As a result, a dielectric resonator device is constructed between the coaxial connectors 33a and 33b, which acts as a bandpass filter composed of four-stage TM mode dielectric resonators.

In the second embodiment, the magnetic field coupling window is formed by removing a part of the outer wall of the cavity, but the outer wall of the cavity is not removed and only the outer conductor is partially removed. The magnetic field coupling window may be provided by removing the magnetic field or providing a portion which is not formed in advance.
Further, the shape of the magnetic field coupling window is not a simple rectangle, but slit-shaped outer conductor non-forming portions may be arranged. Further, by setting the direction of the slit, it is possible to selectively magnetically couple two dielectric columns arranged in the same axial direction among the two composite dielectric columns.

[0027]

According to the TM multimode dielectric resonator device of the first aspect of the present invention, any frequency adjusting member can be inserted and removed in the same direction, which facilitates the frequency adjusting work. Further, since each frequency adjusting member is positioned in a direction substantially perpendicular to the plane formed by the two dielectric columns, the influence on the resonance frequency of other resonators and the coupling coefficient with other resonators is small. Even by inserting and removing, the resonance frequency can be adjusted independently of the resonance frequency of the other resonator and the coupling coefficient with the other resonator.

According to the TM multimode dielectric resonator device of the second aspect, the coupling adjusting member is provided in the same direction as the inserting and removing direction of the frequency adjusting member.
The coupling adjustment work becomes easy as well as the frequency adjustment work.

According to the TM multimode dielectric resonator device of the third aspect, the plurality of composite dielectric columns are arranged in such a relationship that the planes formed by the respective composite dielectric columns are substantially the same plane. Adjusting the resonance frequency of all resonators by inserting / removing each frequency adjusting member from the direction, and configuring each composite dielectric pillar by inserting / removing the coupling adjusting member from the same direction as the inserting / removing direction of the frequency adjusting member. The coupling coefficient between the two resonators can be adjusted.

According to the TM multi-mode dielectric resonator device of the fourth aspect, of the two composite dielectric columns, two parallel dielectric columns or two dielectric columns arranged in the same axial direction are arranged.
Since the two dielectric columns are selectively magnetically coupled to each other through the magnetic field coupling window, it is possible to easily construct a multi-stage resonator device using a plurality of composite dielectric columns.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a TM multimode dielectric resonator device according to a first embodiment.

FIG. 2 is a front view of the TM multimode dielectric resonator device shown in FIG.

FIG. 3 is a partial perspective view of a TM multimode dielectric resonator device according to a second embodiment.

FIG. 4 is a top view and a cross-sectional view of a TM multimode dielectric resonator device according to a second embodiment.

FIG. 5 is a diagram showing how to couple a TM multimode dielectric resonator device according to a second embodiment.

FIG. 6 is a perspective view showing a configuration of a conventional TM multimode dielectric resonator device.

7A and 7B are a top view and a front view of the one-unit dielectric resonator device shown in FIG.

[Explanation of Codes] 10-Composite Dielectric Pillar 11,12-Dielectric Pillar 13,14-Frequency Adjusting Hole 15-Cavity 16-Upper Plate 17,18-Screw Member 19,20-Dielectric Rod 21,22 24-bushing 23-coupling adjustment member 25-lower plate 30a, 30b-magnetic field coupling window 31, 32-seal plate 33a, 33b-coaxial connector 34a, 34b-coupling loop

Claims (4)

[Claims] 1. A TM multimode dielectric resonator device comprising a composite dielectric pillar having a shape in which at least two dielectric pillars are crossed in a space surrounded by an outer conductor. A frequency adjusting hole is formed in the two dielectric pillars along a direction substantially perpendicular to a plane formed by the body pillar, and the frequency adjusting member is provided so as to be insertable into and removable from the frequency adjusting hole. And a TM multimode dielectric resonator device. 2. The TM multimode dielectric resonator device according to claim 1, wherein the coupling adjusting member is provided so as to be insertable and withdrawable in and from the space in the same direction as the inserting and removing direction of the frequency adjusting member. 3. A plurality of composite dielectric columns are arranged such that the planes formed by the composite dielectric columns are substantially the same plane.
Alternatively, the TM multimode dielectric resonator device according to the item 2. 4. Between the two composite dielectric pillars, two dielectric pillars parallel to each other or two dielectric pillars arranged in the same axial direction among the two composite dielectric pillars are selectively selected. 4. The TM multimode dielectric resonator device according to claim 3, wherein a magnetic field coupling window for magnetic field coupling is formed.