JPH0865005A - Dielectric resonator device - Google Patents

Abstract

PURPOSE: To array plural TM multiplex mode dielectric resonators and to perform frequency adjustment and coupling adjustment from the same direction of the same plane to the plural dielectric resonators without forming a hole for inserting and withdrawing a member for the frequency adjustment and a member for the coupling adjustment on the side wall of a cavity and without using a partition plate. CONSTITUTION: Composite dielectric cylinders 10a-10c composed of a shape for which two dielectric cylinders are crossed respectively are arranged so as to let the plane formed by the respective composite dielectric cylinders be the approximately same plane, the dielectric cylinders 12a and 12b whose axial directions are mutually parallel are magnetic field coupled through a loop 32 for coupling and the dielectric cylinders 11b and 11c whose axial directions are the same direction are magnetic field coupled through a window for magnetic field coupling by the notched parts 28b and 28c of the cavity. Thus, the decline of a Q is small and the frequency adjustment and the coupling adjustment are facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of TM multimode dielectric resonators each having a composite dielectric pillar having a shape in which two dielectric pillars intersect in a cavity having a conductor formed on the outer surface thereof. The present invention relates to a dielectric resonator device provided.

[0002]

2. Description of the Related Art Conventionally, a dielectric resonator device having a TM multimode dielectric resonator in which a plurality of dielectric columns are provided in one space surrounded by a conductor has been used as a filter or the like. There is.

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

FIG. 14 is a perspective view showing the arrangement of two TM dual mode dielectric resonators. In FIG. 14, 1a, 1
Each of the resonators b is a TM dual mode dielectric resonator, and each resonator includes a composite dielectric pillar 10a, 10b having a shape in which two dielectric pillars are crossed, and a cavity 15a, 1b.
It is integrally molded with 5b. Cavities 15a, 15
A conductor acting as a ground electrode is formed on the outer surface of b. 13a and 14 are provided on the composite dielectric columns 10a and 10b.
a, 13b, and 14b are provided for frequency adjustment holes, and holes 41a, 42a for holding the frequency adjustment members in the cavities 15a, 15b so as to be freely inserted and removed corresponding to these frequency adjustment holes. 41b and 42b are provided, and the frequency of the resonator is adjusted by each dielectric pillar by inserting and removing the frequency adjusting member from these holes. Further, the cavities 15a and 15b are provided with holes 43a and 43b for holding the coupling adjusting member in the space of the cavity so that the coupling adjusting member can be inserted and removed, and the coupling adjusting member is inserted into and removed from the cavity through these holes. Thus, the coupling adjustment between the resonators by each dielectric pillar is performed. As shown in the figure, in the two TM dual mode dielectric resonators, the opening surfaces of one of the cavities 15a and 15b are opposed to each other so that the planes formed by the composite dielectric columns 10a and 10b are parallel to each other. A partition plate 52 is arranged in between. The partition plate 52 is formed with a magnetic field coupling window for magnetically coupling predetermined dielectric columns of the two composite dielectric columns 10a and 10b.

FIG. 15 is a diagram showing the structure of one of the two TM dual-mode dielectric resonators shown in FIG. 14, (A) being a top view and (B) being a front view. . FIG.
In the figure, 50 and 51 are dielectric rods, and 47 and 48 are screw members integrated with the dielectric rods 50 and 51. Bushings 44 and 45 are provided in the cavity 15, and screw members 47 and 48 are screwed in this portion. In the figure, reference numeral 49 is a coupling adjusting member,
5 is provided with a bushing 46, and a coupling adjusting member 49 is screwed at this portion.

[0006]

SUMMARY OF THE INVENTION Such a conventional TM
The device using the dual mode dielectric resonator has the following problems.

Since a plurality of TM dual-mode dielectric resonators are arranged in such a relationship that the planes formed by the composite dielectric columns are parallel to each other, the frequency adjusting member or the coupling is provided on the side surface of the cavity holding the composite dielectric columns. Holes 41a, 42a, 43a, 41b, 42b, 43 for inserting and removing the adjusting member
Although b is provided, since the locations where these holes are formed in the cavity are the paths of the actual current flowing through the conductor provided on the outer surface of the cavity as shown by the arrow in FIG. It interferes with the actual current and the resonator Qo
(No load Q) is deteriorated.

As shown in FIG. 14, since the partition plate 52 is required between the resonators, the number of parts is increased and the partition plate reduces Q.

When the two TM dual mode dielectric resonators shown in FIG. 14 are formed, the cavities 15a and 15b are formed.
When integrally molding the composite dielectric columns 10a and 10b, the frequency adjusting holes 13a, 14a, 13b and 14b,
Holes 41a, 42a for inserting and removing the frequency adjusting member,
41b and 42b and holes 43a and 43b for inserting / removing the coupling adjusting member cannot be formed at the same time, and all of these holes must be opened in a separate step after being integrally molded, and the resonator itself is expensive. become.

In the conventional TM dual mode dielectric resonator shown in FIG. 15, two resonators are formed because the frequency adjusting member is inserted into and removed from the side wall of the cavity with respect to the composite dielectric pillar. Since the influence of the frequency adjustment member on the even mode and the odd mode resonance mode is different,
When the frequency adjusting member is inserted or removed, the resonance frequency changes, and the coupling coefficient between the two resonators formed by the composite dielectric column also changes. Therefore, the frequency and the coupling coefficient cannot be adjusted independently.

Since there are two surfaces for performing the frequency adjustment and the coupling adjustment, the frequency adjustment and the coupling adjustment are complicated, and automation cannot be applied.

An object of the present invention is to form a single dielectric resonator device by arranging a plurality of TM multimode dielectric resonators without using a partition plate to reduce the number of parts and to reduce Q by the partition plate. An object of the present invention is to provide a dielectric resonator device that prevents the deterioration.

An object of the present invention is to provide a dielectric resonator device in which the Q for the frequency adjusting member and the coupling adjusting member are prevented from being lowered without forming holes for inserting and removing the frequency adjusting member and the coupling adjusting member. Especially.

An object of the present invention is to provide a dielectric resonator device capable of performing frequency adjustment and coupling adjustment for a plurality of dielectric resonators from the same direction on the same plane.

An object of the present invention is to arrange a plurality of TM multimode dielectric resonators in such a manner that the planes formed by the composite dielectric columns are substantially coplanar with each other and to arrange a predetermined distance between adjacent TM multimode dielectric resonators. The present invention is to provide a dielectric resonator device in which resonators of 6 stages or more are provided by sequentially coupling the resonators.

[0016]

In the dielectric resonator device of the present invention, a plurality of T's are formed in such a manner that the plane formed by the composite dielectric pillar having the shape in which two dielectric pillars intersect is substantially the same plane.
The M-multimode dielectric resonator is arranged, and in order to magnetically couple predetermined dielectric columns among the composite dielectric columns provided in two adjacent TM multimode dielectric resonators, the magnetic field coupling is performed. In the above device, among the composite dielectric pillars provided in two adjacent TM multiple mode dielectric resonators, the two dielectric pillars whose axial directions are substantially the same are arranged along the direction of the magnetic field generated by the two dielectric pillars. Magnetic field coupling windows each having a notch are provided in a part of the facing surface of the cavity of the TM multimode dielectric resonator. By providing the magnetic field coupling window formed of the cutout portions in this manner, two dielectric columns whose axial directions are substantially the same direction are magnetically coupled.

In the dielectric resonator device of the present invention,
3. The device according to claim 2, wherein predetermined dielectric columns among the composite dielectric columns provided in two adjacent TM multiple mode dielectric resonators are coupled to each other. Therefore, in the device according to claim 2, the two dielectrics whose axial directions are substantially parallel to each other. A coupling loop made of a loop-shaped conductor that crosses the magnetic field generated by the pillar is provided. Due to the presence of this coupling loop, the respective magnetic fields generated by the two dielectric columns whose axial directions are substantially parallel to each other intersect the coupling loop, and the two dielectric columns are magnetically coupled via the coupling loop. .

In the dielectric resonator device of the present invention, when three or more TM multimode dielectric resonators are arranged to form one dielectric resonator device, as described in claim 3,
Since the planes formed by the composite dielectric columns are substantially the same plane, each T
The M multi-mode dielectric resonator is arranged and, in the two composite dielectric columns of the adjacent TM multi-mode dielectric resonators, in the direction of the magnetic field generated by the two dielectric columns whose axial directions are substantially the same direction. A first coupling means for magnetically coupling the two dielectric columns with each other by providing magnetic coupling windows each having a notch in a part of the facing surfaces of the cavities of the TM multiple mode dielectric resonators adjacent to each other. Of the two composite dielectric columns of the adjacent TM multimode dielectric resonator, which are adjacent to each other, and which are composed of loop-shaped conductors that cross the magnetic field generated by the two dielectric columns whose axial directions are substantially parallel to each other. A loop is provided to form second coupling means for magnetically coupling the two dielectric columns whose axial directions are substantially parallel to each other, and the first coupling means and the second coupling means are alternately arranged. As a result, three or more TM multi-mode dielectric resonators are arranged and adjacent TM multi-mode dielectric resonators are sequentially coupled by the first coupling means or the second coupling means, and six or more stages are arranged. A dielectric resonator device including a resonator is configured.

Further, in the dielectric resonator device of the present invention,
In order to make the frequency of each resonator adjustable, as described in claim 4, a frequency adjusting hole is formed along a direction substantially perpendicular to a plane formed by each composite dielectric column, and a frequency adjusting member is provided. It is provided so that it can be inserted into and removed from the frequency adjusting hole.

Further, in the dielectric resonator device of the present invention,
In order to adjust the coupling between the resonators constituting the TM multi-mode dielectric resonator, the coupling adjusting member is detachably provided in the same direction as the inserting / removing direction of the frequency adjusting member.

[0021]

In the dielectric resonator device according to the first aspect of the present invention, of the composite dielectric columns provided in two adjacent TM multiple mode dielectric resonators, the two dielectrics having the same axial direction are used. Along the direction of the magnetic field generated by the body pillar, magnetic field coupling windows made of cutouts are provided in part of the facing surfaces of the cavities of the two TM multimode dielectric resonators, respectively, so that the axial direction is substantially the same. Two dielectric columns in the same direction are magnetically coupled to each other. Further, since the magnetic field coupling window is formed by the cutout portion, when the conductor is formed on the outer surface of the cavity, silver paste is applied by using, for example, a roller without patterning the outer conductor, and dried. Mass production is improved because it only needs to be baked after curing. Moreover, since the dielectric for the side wall of the cavity does not exist in the magnetic field coupling window, the Q does not deteriorate due to the dielectric.

In the dielectric resonator device according to the second aspect of the present invention, a coupling loop made of a loop-shaped conductor crossing a magnetic field generated by two dielectric columns whose axial directions are substantially parallel to each other is provided. Therefore, the axial directions are almost parallel to each other.
The respective magnetic fields generated by the two dielectric columns intersect with the coupling loop, and the two dielectric columns are magnetically coupled to each other via the coupling loop.

In the dielectric resonator device according to the third aspect of the present invention, the one corresponding to the magnetic field coupling window described in the first aspect is configured as the first coupling means, and the second aspect is described in the second aspect. The one corresponding to the coupling loop is configured as the second coupling means, and the first coupling means and the second coupling means are alternately arranged, so that three or more TM multimode dielectric resonators Adjacent TM multi-mode dielectric resonators are sequentially coupled by the first coupling means or the second coupling means to form a dielectric resonator device having six or more stages of resonators.

In the dielectric resonator device according to the fourth aspect of the present invention, the frequency adjusting hole is formed along the direction substantially perpendicular to the plane formed by each composite dielectric column, and the frequency adjusting member is provided with the frequency adjusting member. Since it is provided so that it can be inserted into and removed from the use hole, it is not necessary to provide a hole for holding the frequency adjusting member in the side wall of the cavity so that it can be inserted and removed, and Q does not decrease. Further, since each frequency adjusting member is positioned in a direction substantially perpendicular to the plane formed by the two dielectric columns forming the composite dielectric column, the resonance frequency of other resonators or other resonances can be obtained even by inserting or removing the same. Frequency adjustment can be performed independently of the coupling coefficient with the device.

In the dielectric resonator device according to the fifth aspect of the present invention, since the coupling adjusting member is provided so as to be insertable and withdrawable in the same direction as the inserting and removing direction of the frequency adjusting member, whichever coupling adjusting member is used. Can be adjusted together with the frequency adjusting member from the same direction on the same surface, so that the coupling adjusting work as well as the frequency adjusting work becomes easy.

[0026]

1 to 3 show the structure of a dielectric resonator device according to a first embodiment of the present invention.

FIG. 1 shows two T's used in a dielectric resonator device.
It is a perspective view which shows the structure and arrangement | positioning relationship of an M double mode dielectric resonator. In FIG. 1, 1a and 1b are dual mode dielectric resonators, respectively. The TM double mode dielectric resonator 1a is composed of a composite dielectric pillar 10a and a cavity 15a, and the TM double mode dielectric resonator 1b is composed of a composite dielectric pillar 10b and a cavity 15b. Composite dielectric pillar 1
0a has a shape in which the dielectric columns 11a and 12a intersect each other, and is formed integrally with the cavity 15a. Similarly, the composite dielectric pillar 11b is composed of the dielectric pillars 11b, 1
It is formed by intersecting shapes of 2b and is integrally formed with the cavity 15b. A conductor 2a is formed on the outer surface (four side surfaces) of the cavity 15a, and the conductor and the composite dielectric column 10a form two resonators. Similarly, a conductor 2b is formed on the outer surface (four side surfaces) of the cavity 15b, and the conductor and the composite dielectric pillar 10b are formed.
And form two resonators. Further, a groove g is provided at the intersection of the two dielectric columns of the composite dielectric column 10a to cause a difference between the odd-mode resonance frequency and the even-mode resonance frequency generated by the dielectric columns 11a and 12a. The two resonators including the columns 11a and 12a are coupled to each other. Similarly, a groove g is provided at the intersection of two dielectric columns of the composite dielectric column 10b to cause a difference between the odd-mode resonance frequency and the even-mode resonance frequency generated by the dielectric columns 11b and 12b. The two resonators including the columns 11b and 12b are coupled to each other. Dielectric columns 11a, 12a,
11b and 12b respectively include 13a, 14a, 13b,
The frequency adjusting hole 14b is provided in a direction perpendicular to the plane formed by the composite dielectric column. Furthermore, the cavity 15a,
Notches 28a and 28b are provided in a part of the surfaces of 15b facing each other. The notches 28a and 28b have conductors 2a,
2b does not exist and is provided along the direction of the magnetic field generated by the two dielectric columns 11a and 11b whose axial directions are the same, so that these two dielectric columns 11a and 11b are selectively magnetically coupled to each other. To do. In this way, the cutouts 28a, 28
Since the magnetic field coupling window is formed by providing b, when the conductor is formed on the outer surface of the cavity, the silver paste is applied by using, for example, a roller without patterning the conductor, and only baking after drying and curing is performed. Therefore, mass productivity is improved. Moreover, since the dielectric for the side wall of the cavity does not exist in the magnetic field coupling window, the Q does not deteriorate due to the dielectric. According to the measurement, when the magnetic field coupling window was formed by patterning the conductor without forming the notch portion, Q was reduced by 25%, whereas when the magnetic field coupling window was formed by the notch portion. Was 10 to 15%, and the Q of the resonator was improved by 10 to 15%.

FIG. 2 is a perspective view of a dielectric resonator device in which the cavity opening of each resonator is covered with a metal panel from the state shown in FIG. In FIG. 2, reference numerals 16 and 17 denote metal panels, which cover the upper and lower surfaces of the two dielectric resonators shown in FIG. 1 and electrically connect between the conductor formed on the outer surface of the cavity and the metal panel. Connecting. For example, the metal panel 1 and the conductors 2a and 2b provided with metal foil such as copper foil on the outer surface of the cavity of the dielectric resonator.
Solder by straddling 6 and 17. Metal panel 16
18a, 19a, 20a, 18b, 19b, 20b
6 bushes are provided, and the bushes 18a,
19a includes a screw member 21 which is a part of the frequency adjusting member.
a, 22a are screwed together, and bushes 18b, 19b
Are screw members 21b, 2 which are part of the frequency adjusting member.
2b is screwed together. Further, a coupling adjusting member 23a is screwed onto the bush 20a, and a coupling adjusting member 23b is screwed onto the bush 20b. The coupling adjusting member 23a is attached to the cavity 15 by the composite dielectric pillar 10a.
The coupling adjustment between the two resonators by the two dielectric columns 11a and 12a forming the composite dielectric column 10a is performed by inserting / removing into / from one of the four spaces formed in a. . Similarly, the coupling adjusting member 23b is
Two resonances due to the two dielectric columns 11b and 12b forming the composite dielectric column 10b are obtained by inserting / removing into / from one of the four spaces formed in the cavity 15b by the composite dielectric column 10b. Adjust coupling between vessels.

FIG. 3 is a sectional view of the YY portion in FIG. In FIG. 3, reference numerals 24a, 25a, 24b and 25b are dielectric rods, respectively, and screw members 21a, 22a and 2b.
The frequency adjusting members are respectively formed by being integrated with 1b and 22b. Input / output connectors 26a, 26b are attached to the metal panel 17, and coupling loops 27a, 2 are provided between the respective central conductors and the metal panel 17.
7b is provided. (However, in this example, the loop surface is in the direction perpendicular to the paper surface.

1 to 3, the coupling loop 27a of FIG. 3 is magnetically coupled to the dielectric column 12a of FIG. 1, and the coupling loop 27b of FIG. 3 is of the dielectric column 12b of FIG.
Magnetically coupled with. As described above, the dielectric pillar 11a-
Magnetic fields are coupled between 11b through the magnetic field coupling windows formed by the cutouts 28a and 28b of the cavities, so that a dielectric resonator that acts as a bandpass filter composed of four-stage resonators as a whole can be obtained.

Next, the construction of the dielectric resonator device according to the second embodiment of the present invention is shown in FIGS.

FIG. 4 shows two Ts used in a dielectric resonator device.
It is a perspective view which shows the structure and arrangement | positioning relationship of an M double mode dielectric resonator. In FIG. 4, 1a and 1b are dual mode dielectric resonators, respectively. The TM double mode dielectric resonator 1a is composed of a composite dielectric pillar 10a and a cavity 15a, and the TM double mode dielectric resonator 1b is composed of a composite dielectric pillar 10b and a cavity 15b. Composite dielectric pillar 1
0a has a shape in which the dielectric columns 11a and 12a intersect each other, and is formed integrally with the cavity 15a. Similarly, the composite dielectric pillar 11b is composed of the dielectric pillars 11b, 1
It is formed by intersecting shapes of 2b and is integrally formed with the cavity 15b. A conductor 2a is formed on the outer surface (four side surfaces) of the cavity 15a, and the conductor and the composite dielectric column 10a form two resonators. Similarly, a conductor 2b is formed on the outer surface (four side surfaces) of the cavity 15b, and the conductor and the composite dielectric pillar 10b are formed.
And form two resonators. Further, a groove g is provided at the intersection of the two dielectric columns of the composite dielectric column 10a to cause a difference between the odd-mode resonance frequency and the even-mode resonance frequency generated by the dielectric columns 11a and 12a. The two resonators including the columns 11a and 12a are coupled to each other. Similarly, a groove g is provided at the intersection of two dielectric columns of the composite dielectric column 10b to cause a difference between the odd-mode resonance frequency and the even-mode resonance frequency generated by the dielectric columns 11b and 12b. The two resonators including the columns 11b and 12b are coupled to each other. Dielectric columns 11a, 12a,
11b and 12b respectively include 13a, 14a, 13b,
The frequency adjusting hole 14b is provided in a direction perpendicular to the plane formed by the composite dielectric column. Furthermore, the cavity 15a,
Recesses 30a and 30b are provided in a part of the facing surfaces of 15b. The loop holding portion of the coupling loop is attached to this recess as described later.

FIG. 5 shows a state in which a coupling loop is attached from the state shown in FIG. In FIG. 5, reference numeral 32 is a coupling loop, and 31 is a loop holding portion made of a fluororesin or the like for insulatingly holding the coupling loop 32. Loop for coupling 3
2 crosses the magnetic field generated by two dielectric columns 12a, 12b whose axial directions are parallel to each other among the composite dielectric columns 10a, 10b. Therefore, the dielectric columns 12a and 12b are magnetically coupled via the coupling loop 32.

FIG. 6 is a perspective view of a dielectric resonator device in which the cavity opening of each resonator is covered with a metal panel from the state shown in FIG. In FIG. 6, reference numerals 16 and 17 denote metal panels, which cover the upper and lower surfaces of the two dielectric resonators shown in FIG. 5 and are formed on the outer surface of the cavity via the metal foil as described above. Make an electrical connection between the conductor and the metal panel. Metal panel 1
6 includes 18a, 19a, 20a, 18b, 19b, 20
6 bushes shown by b are provided, and the bush 18
Screw members 21a and 22a, which are a part of the frequency adjusting member, are screwed into a and 19a, and bushes 18b and 1
9b includes a screw member 21 which is a part of the frequency adjusting member.
b and 22b are screwed together. Further, a coupling adjusting member 23a is screwed onto the bush 20a, and a coupling adjusting member 23b is screwed onto the bush 20b.

FIG. 7 is a sectional view of a portion YY in FIG. In FIG. 7, reference numerals 24a, 25a, 24b, 25b are dielectric rods, and screw members 21a, 22a, 2
The frequency adjusting members are respectively formed by being integrated with 1b and 22b. Input / output connectors 26a, 26b are attached to the metal panel 17, and coupling loops 27a, 2 are provided between the respective central conductors and the metal panel 17.
7b is provided.

8A and 8B are views showing the structures of a coupling loop and a loop holding portion for coupling the resonators, FIG. 8A being a top view and FIG. 8B being a front view. As shown in the figure, the front and rear sides in the figure are bent at a predetermined angle, and the left and right sides in the figure of the coupling loop 32 are brought close to the dielectric column side by a height h. As the height h of the coupling loop 32 increases, the amount of the magnetic flux generated by the dielectric columns 12a and 12b shown in FIG. 5 that passes through the coupling loop 32 increases.
The coupling degree between the a and 12b and the coupling loop 32 is increased, and the coupling coefficient between the dielectric columns 12a-12b is increased. Therefore, depending on the height h of the coupling loop 32, the dielectric pillar 12 is
The binding between a-12b is adjusted.

The dimension of each part shown in FIG. 8 is a = 44 mm, b
= 37mm, c = 7mm, d = 8mm, e = 2mm, 50mm
When used in a resonator having an angular cavity, by changing the dimension h, the frequency change between the even mode and the odd mode and the deterioration rate of the unloaded Q when the coupling coefficient between the resonators is changed. The relationship is shown in FIG. As shown in FIG. 9 (A), the frequencies of the even mode and the odd mode are vertically and symmetrically separated from each other around the resonance frequency fo of the resonator alone. Therefore, the coupling adjustment should be performed independently of the frequency. You can Further, as shown in (B), when the coupling coefficient k = 3%, Q only decreases by about 7%, and Q due to the coupling loop 32 is reduced.
Is small. The change amount of Q (ΔQ) is the average value of Q (Qeven) in the even mode and Q (Qodd) in the odd mode and Q.
It is calculated as the difference from o.

In the example shown in FIG. 8, a non-grounded type is shown, but as shown in FIG. 10, the end of the coupling loop may be grounded. That is, as shown in FIG. 10, the two ends of the coupling loop 32 may be electrically connected to the metal panel 16. In this case, a coupling loop can be provided on the metal panel 16 side in advance, and the metal panel with the coupling loop only needs to be covered on the opening surface of the cavity of the dielectric resonator. High workability.

FIG. 11 is a view showing another example in which a coupling loop is provided in a device by attaching the coupling loop to a metal panel. In FIG. 11, reference numeral 33 denotes a loop holding material entirely made of an insulating resin. From the state shown in FIG. 11A, the loop holding material 33 is inserted into a hole provided in the metal panel 16 in advance, and two loops 32 for coupling are further provided. The hole is covered on the protrusion of the loop holding material 33. After that, the same figure (B)
As shown in FIG. 4, the protrusion of the loop holding material 33 is heated and melted, and the coupling loop 32 is attached to the metal panel 16 in an insulated state via the melted loop holding material 33 '.

Next, FIG. 12 shows the structure of a dielectric resonator device according to the third embodiment. In FIG. 12, (A) is a top view before attachment of the metal panel, and (B) is a cross-sectional view of the XX portion in (A) with the metal panel attached. 1a, 1b and 1c are TM double mode dielectric resonators, respectively, and a coupling loop 3 is provided between the resonators 1a and 1b.
2 is provided, and a magnetic field coupling window is formed by the notches 28b and 28c of the cavity between the resonators 1b-1c. As a result, the coupling loop 32 is provided between the dielectric columns 12a-12b.
And the dielectric columns 11b-11c are magnetically coupled through the magnetic field coupling windows 28b and 28c. 24
a, 25a, 24b, 25b, 24c, 25c are dielectric rods, and screw members 21a, 22a, 21b,
22b, 21c, and 22c are integrated with each other to form frequency adjusting members. These frequency adjusting members are screwed into a bush attached to the metal panel 16. Although not shown in FIG. 12, the coupling adjusting member is screwed to the bush attached to the metal panel 16 as in the example shown in FIG. Metal panel 17
I / O connectors 26a and 26c are attached to
A coupling loop 27 is provided between the center conductors of the input / output connectors 26a and 26c and the metal panel 17 in the directions shown in the drawings.
a and 27c are attached. In the figure, the loop surface of the coupling loop 27c is perpendicular to the paper surface. Therefore, the coupling loop 27a is magnetically coupled to the dielectric pillar 11a,
The coupling loop 27c is magnetically coupled to the dielectric pillar 11c.
Further, the two resonators formed by the two dielectric columns forming each of the composite dielectric columns 10a, 10b, and 10c are coupled to each other due to the existence of the groove g provided at each intersection, so that the result is shown in FIG. The device is a dielectric resonator device that acts as a bandpass filter or the like composed of 6-stage resonators.

Next, FIG. 13 shows the structure of the dielectric resonator device according to the fourth embodiment. FIG. 13 is a top view before attaching the upper metal panel. In FIG. 13, 1a and 1
b, 1c, 1d, and 1e are TM dual-mode dielectric resonators, and the coupling loop 32 is provided between the resonators 1a-1b.
ab is provided, and a magnetic field coupling window formed by the notches 28b and 28c of the cavity is provided between the resonators 1b-1c.
A coupling loop 32cd is provided between c-1d and the resonator 1d.
A magnetic field coupling window formed by the notches 28d and 28e of the cavity is provided between -1e. In this way, by arranging a plurality of TM dual-mode dielectric resonators and alternately arranging the coupling means composed of coupling loops and the coupling means by the magnetic field coupling window, it is also possible to use two composite dielectric columns. By using the TM double mode dielectric resonator in which the two resonators are coupled to each other, the two dielectric resonators of each dielectric resonator are coupled, and the coupling between two adjacent resonators is It is possible to obtain a dielectric resonator device composed of resonators having six or more stages, which acts as, for example, a bandpass filter.

[0042]

According to the dielectric resonator device of the first and second aspects of the present invention, the TM multiple mode dielectric resonators are arranged such that the planes formed by the composite dielectric columns are substantially the same plane. Therefore, the conventional partition plate is unnecessary, and the Q does not decrease due to the use of the partition plate.

According to the dielectric resonator device of the first aspect of the present invention, of the composite dielectric columns provided in two adjacent TM multiple mode dielectric resonators, the axial directions are substantially the same. Since the magnetic field coupling window that magnetically couples the two dielectric columns is a magnetic field coupling window consisting of notches, when forming a conductor on the outer surface of the cavity, for example, a roller or the like can be used without patterning the outer conductor. It is only necessary to apply a silver paste by using it, dry it, and then bake it, so that mass productivity is improved. Moreover, since the dielectric for the side wall of the cavity does not exist in the magnetic field coupling window, the Q does not deteriorate due to the dielectric.

According to the dielectric resonator device of the second aspect of the present invention, since the two dielectric columns whose axial directions are substantially parallel to each other are magnetically coupled to each other through the coupling loop, the structure is simple. Coupling adjustment is also easy.

According to the dielectric resonator device of the third aspect of the present invention, a dielectric resonator device having three or more TM multi-mode dielectric resonators and having six or more stages of resonators is easy. Is composed of.

According to the dielectric resonator device of the fourth aspect of the present invention, the frequency adjusting hole is formed along the direction substantially perpendicular to the plane formed by each composite dielectric pillar, and the frequency adjusting member is provided. Since it is provided so that it can be inserted into and removed from the frequency adjusting hole, it is not necessary to provide a hole for holding the frequency adjusting member in the cavity side wall so that it can be inserted and removed. There is no decline. Also,
Since each frequency adjusting member is positioned in a direction substantially perpendicular to the plane formed by the two dielectric columns that form the composite dielectric column, the insertion and removal of the frequency adjustment member will cause the resonance frequency of other resonators and other resonators to be different from each other. The frequency can be adjusted independently of the coupling coefficient of.

According to the dielectric resonator device of the fifth aspect of the present invention, since the coupling adjusting member is provided so as to be insertable and withdrawable in the same direction as the inserting and removing direction of the frequency adjusting member,
Since any of the coupling adjusting members can be adjusted together with the frequency adjusting member from the same direction on the same surface, the coupling adjusting work as well as the frequency adjusting work becomes easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of two resonators used in a dielectric resonator device according to a first embodiment.

FIG. 2 is a perspective view showing a configuration of a dielectric resonator device according to a first embodiment.

FIG. 3 is a cross-sectional view taken along the line YY in FIG.

FIG. 4 is a perspective view showing a configuration of two dielectric resonators used in the dielectric resonator device according to the second embodiment.

5 is a diagram showing a state in which a coupling loop is attached from the state shown in FIG.

FIG. 6 is a perspective view showing a configuration of a dielectric resonator device according to a second embodiment.

FIG. 7 is a cross-sectional view taken along line YY in FIG.

FIG. 8 is a diagram showing a configuration of a coupling loop used in the dielectric resonator device according to the second embodiment.

9 is a diagram showing a case where the coupling coefficient between the resonators is changed by changing the dimension h of the coupling loop shown in FIG.
The relationship between the frequency change between the even mode and the odd mode and the deterioration rate of the no-load Q is shown.

FIG. 10 is a diagram showing a modified example of a coupling loop.

FIG. 11 is a view showing another configuration of the coupling loop and a mounting structure for the metal panel.

12A and 12B are diagrams showing a configuration of a dielectric resonator device according to a third embodiment, FIG. 12A is a top view before a metal panel is attached, and FIG. 12B shows a state in which the metal panel is attached ( It is sectional drawing of the XX part in A).

FIG. 13 is a diagram showing a configuration of a dielectric resonator device according to a fourth embodiment.

FIG. 14 is a perspective view showing a configuration of a conventional dielectric resonator device.

15A and 15B are a top view and a front view of the one-unit dielectric resonator shown in FIG.

[Explanation of symbols]

 2-conductor 10-composite dielectric pillar 11,12-dielectric pillar 13,14-hole for frequency adjustment 15-cavity 16,17-metal panel 18,19,20-bush 21,22-screw member 23-coupling adjustment Member 24, 25-dielectric rod 26-input / output connector 27-coupling loop 28-notch portion 30-recess 31-loop holding portion 32-coupling loop 33-loop holding material

Claims (5)

[Claims] 1. A cavity having a conductor formed on an outer surface thereof,
A dielectric resonator device comprising a plurality of TM multi-mode dielectric resonators, each of which is provided with a composite dielectric pillar having a shape in which two dielectric pillars intersect each other, wherein the planes formed by the composite dielectric pillars are substantially the same. Each TM multi-mode dielectric resonator is arranged in a plane relationship, and two dielectrics having the same axial direction among the composite dielectric columns provided in two adjacent TM multi-mode dielectric resonators are used. The two TMs are arranged along the direction of the magnetic field generated by the body pillar.
A magnetic field coupling window made of a cutout is provided in each of the facing surfaces of the cavity of the multimode dielectric resonator.
A dielectric resonator device characterized in that two dielectric columns are selectively magnetically coupled to each other. 2. A cavity having a conductor formed on the outer surface thereof,
A dielectric resonator device comprising a plurality of TM multi-mode dielectric resonators, each of which is provided with a composite dielectric pillar having a shape in which two dielectric pillars intersect each other, wherein the planes formed by the composite dielectric pillars are substantially the same. Each TM multi-mode dielectric resonator is arranged in a planar relationship, and two dielectrics whose axial directions are substantially parallel to each other among composite dielectric columns provided in two adjacent TM multi-mode dielectric resonators A dielectric resonator device, characterized in that a coupling loop made of a loop-shaped conductor that traverses a magnetic field generated by a column is provided to selectively magnetically couple the two dielectric columns. 3. A cavity having a conductor formed on the outer surface thereof,
A composite dielectric pillar having a shape in which two dielectric pillars intersect each other is provided.
In a dielectric resonator device comprising a plurality of TM multimode dielectric resonators in which two resonators are coupled to each other, the TM multimode dielectrics are arranged such that the planes formed by the composite dielectric columns are substantially the same plane. The body resonators are arranged and, of the two composite dielectric columns of the adjacent TM multimode dielectric resonators, the two magnetic poles having the axial directions substantially the same direction are aligned with each other along the direction of the magnetic field. A magnetic field coupling window consisting of a notch is provided in each of the opposing surfaces of the cavities of the adjacent TM multimode dielectric resonators, and the two dielectric columns whose axial directions are substantially the same are selectively subjected to a magnetic field. Of the first coupling means for coupling and the two composite dielectric columns of the adjacent TM multi-mode dielectric resonators, the loop-shaped conductivity crosses the magnetic field generated by the two dielectric columns whose axial directions are substantially parallel to each other. A dielectric material, characterized in that a coupling loop made of a body is provided, and second coupling means for selectively magnetically coupling the two dielectric columns whose axial directions are substantially parallel to each other are alternately arranged. Resonator device. 4. A frequency adjusting hole is formed in the composite dielectric pillar along a direction substantially perpendicular to a plane formed by each composite dielectric pillar, and a frequency adjusting member is inserted into and removed from the frequency adjusting hole. The dielectric resonator device according to claim 1, wherein the dielectric resonator device is provided freely. 5. The dielectric resonator device according to claim 4, wherein the coupling adjusting member is provided so as to be insertable into and removable from the cavity in the same direction as the inserting direction of the frequency adjusting member.