WO2018023922A1 - Te mode multi-passband dielectric filter - Google Patents

Abstract

Disclosed is a TE mode multi-passband dielectric filter capable of solving a problem in which conventional multi-passband filters have complex designs and low out-of-band rejection. The TE mode multi-passband dielectric filter comprises a TE mode dielectric resonator (5), a supporting post (20), a dielectric tuning rod (8), a tuning dial (6), a circularly curved metal member (2) for controlling port coupling, an input/output interface (3), a cavity (1), and an inter-cavity coupling structure (13). A multi-passband response is realized by setting heights of the dielectric tuning rod (8) and the tuning dial (6). The TE mode dielectric resonator (5) performs inter-resonator coupling by means of the inter-cavity coupling structure (13). The circularly curved metal member (2) is used to perform feed coupling. By combining and the same with an out-of-band rejection method for a dielectric filter of the invention, the circularly curved metal member (2) can be arranged in different manners so as to set transmission zeros at the left and right sides of a frequency band, thereby improving out-of-band rejection of the filter. The invention has a high Q value, can be designed and processed easily, and has favorable out-of-band rejection.

Description

 TE mode multi-passband dielectric filter

Technical field

 The present invention relates to the field of radio frequency communication filtering technologies, and in particular, to a TE mode multi-passband dielectric filter.

Background technique

With the rapid development of mobile communications, communication spectrum resources are becoming more and more crowded, and communication systems often work in multiple frequency bands. This requires a high performance multi-passband filter to increase communication system capacity and avoid interference between adjacent channels. At the same time, people have higher and higher requirements for communication transmission quality, which also puts higher requirements on filter performance indicators in communication systems, lower insertion loss requirements and smaller volume requirements. The dielectric resonator has the characteristics of high Q-load, small size and high dielectric constant, which satisfies the development of communication systems, and has been rapidly developed, and is widely used in wireless base stations and aerospace.

 2014 T.V. Pidhurska and A.A. Trubin at Radioelectronics and Published on Communications Systems titled "Dual-bandpass filter built on rectangular Dielectric "Resistors" article. Using a rectangular dielectric resonator, the two-passband is obtained by exciting the two modes of the fundamental mode TE01δ mode and the secondary mode TE02δ mode, but the stopband does not produce a transmission zero point, resulting in insufficient frequency selectivity.

 2015 Seema Awasthi and Animesh Biswas et al. at International Journal of RF and Microwave Computer-Aided Engineering entitled "Dual-band Dielectric resonator bandstop "Filters" article. Using a TE mode dielectric resonator structure, combined with source load coupling, produces a transmission zero, but also causes an increase in cavity size.

Summary of the invention

The present invention aims to solve the above-mentioned deficiencies of the prior art, and proposes a TE mode multi-passband dielectric filter to generate transmission zeros, simplify multi-passband filter design, improve out-of-band rejection of filters and improve filters. Frequency selectivity.

 To achieve the above object, the present invention is achieved by at least one of the following technical solutions.

A TE mode double-pass dielectric filter includes: a cavity, four TE mode dielectric resonators, four support columns, and four medium tuning rods respectively arranged in four corners of the cavity in the cavity And four medium tuning disks, a first metal arc coupled to the control port, a second metal arc, two input and output interfaces, and an inter-cavity coupling structure; the first metal arc is connected to the first input and output interface, and the second The metal arc is connected to the second input/output interface; each of the four TE mode dielectric resonators is provided with a support column, and the arrangement relationship between the four dielectric tuning disks and the four TE mode dielectric resonators is the next one. Corresponding and concentric on the orthographic projection; four medium tuning rods are respectively correspondingly located on four medium tuning discs; four TE mode dielectric resonators are sequentially a first TE mode dielectric resonator, a second TE mode dielectric resonator, a third TE mode dielectric resonator, a fourth TE mode dielectric resonator;

Wherein the first medium tuning disk and the second medium tuning disk are of the same height, the third medium tuning disk and the fourth medium tuning disk are of the same height and higher than the height of the first medium tuning disk; the first medium tuning rod and the second medium The tuning rods have the same height, and the third medium tuning rod and the fourth medium tuning rod have the same height and are higher than the first medium tuning rod height;

The four TE mode dielectric resonators perform coupling between the resonators through the inter-cavity coupling structure, and simultaneously input and output feed coupling through the first metal arc and the second metal arc; the cavity is divided according to the four corners Is four resonant cavities;

The first input/output interface is located on the upper side of the upper left resonant cavity in the cavity, and the second input/output interface is located on the right side of the upper right resonant cavity in the cavity; the first metal arc is located on the left side of the first input/output interface The second metal arc is located above the input and output interfaces. The difference in the way the metal arc is set can set the transmission zero point on the left and right sides of the band.

Further, the support column, the dielectric tuning rod, the dielectric tuning disk and the TE mode dielectric resonator in each cavity are concentrically arranged.

Further, the first metal arc and the second metal arc are both concentric with the medium tuning disk in the resonant cavity in which it is located.

Further, the four support columns are all fixed in the cavity by screws, and the TE mode dielectric resonators are in one-to-one correspondence with the support columns and fixed by bonding.

Further, the length and width of the first metal arc are equal to the length and width of the second metal arc, and the metal arc is welded to the corresponding input/output interface to form a filter feed structure.

Further, the two input and output interfaces are located at the center of the cavity wall of the associated resonator.

Further, the inter-cavity coupling structure includes a first inter-cavity coupling structure and a second inter-cavity coupling structure, and the first inter-cavity coupling structure is located between the first TE mode dielectric resonator and the fourth TE mode dielectric resonator; The second inter-cavity coupling structure is formed by two mutually perpendicular structures between the first TE mode dielectric resonator and the second TE mode dielectric resonator, the second TE mode dielectric resonator and the third TE mode dielectric resonator. a coupling structure between the third TE mode dielectric resonator and the fourth TE mode dielectric resonator, and a coupling window width between the third TE mode dielectric resonator and the fourth TE mode dielectric resonator is zero.

Further, another similar solution is: including a cavity, six TE mode dielectric resonators arranged in two rows in the cavity, six support columns, six media tuning rods and six media tuning disks, controlled a first metal arc coupled to the port, a second metal arc, two input and output interfaces, and an inter-cavity coupling structure; the first metal arc is coupled to the first input and output interface, the second metal arc and the second input and output Interface connection; each of the six TE mode dielectric resonators is provided with a support column, and the arrangement relationship between the six dielectric tuning disks and the six TE mode dielectric resonators is upper and next corresponding and concentric on the orthographic projection; The six medium tuning rods are respectively correspondingly located on six medium tuning discs; among the six TE mode dielectric resonators, the first TE mode dielectric resonator, the second TE mode dielectric resonator, and the third TE mode dielectric resonance , fourth TE mode dielectric resonator, fifth TE mode dielectric resonator, sixth TE mode dielectric resonator;

Wherein the first medium tuning disk and the second medium tuning disk are of the same height, the third medium tuning disk and the fourth medium tuning disk are of the same height, the fifth medium tuning disk and the sixth medium tuning disk are of the same height, and the first medium is tuned The disk, the fourth medium tuning disk, and the sixth medium tuning disk are in the same row and the height is sequentially increased;

The first medium tuning rod and the second medium tuning rod have the same height, the third medium tuning rod and the fourth medium tuning rod have the same height, and the fifth medium tuning rod and the sixth medium tuning rod have the same height, the first medium tuning rod and the fourth medium Media tuning lever, sixth media tuning lever Located in the same row and in increasing height;

The six TE mode dielectric resonators perform coupling between the resonators through the inter-cavity coupling structure, and simultaneously input and output feed coupling through the first metal arc and the second metal arc; the cavity is arranged according to the two rows Six resonant cavities;

The first input/output interface is located on the upper side of the upper left resonant cavity in the cavity, and the second input/output interface is located on the right side of the upper right resonant cavity in the cavity; the first metal arc is located on the left side of the first input/output interface The second metal arc is located above the input and output interfaces. The difference in the way the metal arc is set can set the transmission zero point on the left and right sides of the band.

The coupling window formed by the inter-cavity coupling structure is located between any two adjacent TE mode dielectric resonators, and the coupling window width between the third TE mode dielectric resonator and the fourth TE mode dielectric resonator is 0; The coupling window width between the six TE mode dielectric resonator and the fifth TE mode dielectric resonator is also zero.

 Compared with the prior art, the present invention has the following advantages and technical effects:

 1. The invention adopts a TE mode dielectric resonator, and punches the hole to avoid high-order mode interference, and has a high Q value and facilitates processing and manufacturing of the filter;

 2. The invention can realize multi-passband response by setting the tuning disk of the dielectric resonator and the height of the tuning rod, which simplifies the design complexity;

 3. The invention obtains the idea of controllable transmission zero according to changing the feeding mode, so that both design schemes have symmetric transmission zero points, improve frequency selectivity, avoid complicated port coupling structure of source load coupling, or complex electromagnetic coupling. Tuning structure.

DRAWINGS

FIG. 1 is an apparatus for real-time monitoring technology based on virtual reality interaction technology and brain function in an embodiment.

1 is a top plan view of a TE mode double pass dielectric filter after the cover is removed in the embodiment;

 Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

 3 is a simulation and test graph of the transmission characteristic |S21| and the return loss |S11| of the embodiment shown in FIG. 1.

 4 is a top plan view of the TE mode three-way dielectric filter after removing the cover plate;

 Figure 5 is a cross-sectional view taken along line B-B of Figure 4;

 6 is a simulation and test graph of the transmission characteristic |S21| and the return loss |S11| of the embodiment shown in FIG.

detailed description

The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the scope of the following examples.

Example 1

As shown in FIG. 1 and FIG. 2, a TE mode double-pass dielectric filter includes: a cavity (1) in which four TE mode media are sequentially arranged in four corners of the cavity. Resonator (5, 19, 16, 12), four support columns (only 20, 22 are shown), four media tuning levers (8, 17, 14, 10) and four media tuning disks (6, 18, 15, 11), the first metal arc 2, the second metal arc 4, the two input and output interfaces (3, 7), and the inter-cavity coupling structure of the control port coupling; the first metal arc 2 and the first An input/output interface 3 is connected, and a second metal arc 4 is connected to the second input/output interface 7; each of the four TE mode dielectric resonators is provided with a support column, four medium tuning disks and four TE mode media. The arrangement relationship between the resonators is upper and next correspondence and concentric on the orthographic projection; the four medium tuning rods are respectively correspondingly located on the four medium tuning disks; the four TE mode dielectric resonators are sequentially the first TE mode medium. a resonator 5, a second TE mode dielectric resonator 19, a third TE mode dielectric resonator 16, and a fourth TE mode dielectric resonator 12; wherein said The media tuning disk 6 and the second media tuning disk 18 are of the same height, and the third media tuning disk 15 and the fourth media tuning disk 11 are of the same height and higher than the height of the first media tuning disk 6; the first media tuning lever 8 and the second The medium tuning rods 17 are of the same height, the third medium tuning rod 14 and the fourth medium tuning rod 10 are of the same height and higher than the height of the first medium tuning rod 8; the four TE mode dielectric resonators are resonators through the inter-cavity coupling structure Coupling between the first metal arc 2 and the second metal arc 4; the cavity 1 is divided into four resonant cavities according to the four corners; the first input/output interface 3 Located on the upper side of the upper left resonator in the cavity 1, the second input/output interface 7 is located on the right side of the upper right resonator in the cavity 1; the first metal arc 2 is located on the left side of the first input/output interface 3, The two metal arc 4 is located above the input and output interface 7. The metal arc (2, 4) is set differently to set the transmission zero point on the left and right sides of the band. The support column, the dielectric tuning rod, the dielectric tuning disk, and the TE mode dielectric resonator 5 in each cavity are concentrically arranged. The first metal arc 2 and the second metal arc 4 are both concentric with the medium tuning disk in the resonant cavity in which they are located. The four support columns are all fixed in the cavity 1 by screws 21, and the TE mode dielectric resonators are in one-to-one correspondence with the support columns and fixed by bonding. The length and width of the first metal arc 2 are equal to the length and width of the second metal arc 4, and the metal arc is welded to the corresponding input/output interface to form a filter feed structure. The two input and output interfaces 3, 7 are located at the center of the cavity wall of the associated resonator. The inter-cavity coupling structure includes a first inter-cavity coupling structure 9 and a second inter-cavity coupling structure 13, and the first inter-cavity coupling structure 9 is located in the first TE mode dielectric resonator 5 and the fourth TE mode dielectric resonator 12. The second inter-cavity coupling structure 13 is formed by two mutually perpendicular structures, that is, between the first TE mode dielectric resonator 5 and the second TE mode dielectric resonator 19, and the second TE mode dielectric resonator 19 and the third. a coupling structure between the TE mode dielectric resonators 16, between the third TE mode dielectric resonator 16 and the fourth TE mode dielectric resonator 12, and the third TE mode dielectric resonator 16 and the fourth TE mode dielectric resonator 12 The coupling window width is 0.

A dual pass band filter of four resonators will be further exemplified below.

Referring to Figures 1 and 2, the double pass band pass filter is mainly composed of four TE mode dielectric resonators (5, 12, 16, 19), four support columns (20, 22, 24, 25), four media. Tuning lever (8, 10, 14, 17), medium tuning disc (6, 11, 15, 18), metal arc (2, 4) for control port coupling, input and output interface (3, 7), cavity 1 It is composed of an inter-cavity coupling structure (13, 9). among them:

The TE mode dielectric resonator uses a dielectric material having a dielectric constant of εr=37 and a loss tangent angle tanδ=0.0002; as shown in FIG. 2, the height is 13 mm, the outer diameter is 32 mm, and the inner hole diameter is 8 mm, and The support columns are bonded. The support column is made of alumina material, the height is 7mm, the outer diameter is 19.5mm, the inner hole diameter is 13.5mm, the height is 4mm, and the inner hole of the lower layer is a threaded hole with a diameter of 3mm, and the metal screw (21, 23) is passed. Fixed in the cavity.

The medium tuning rod has a length of 35 mm and a diameter of 6 mm; the medium tuning disk has a length of 2 mm and a diameter of 25 mm; the dielectric tuning disk and the tuning rod are made of the same dielectric material, and the dielectric constant is εr=10, and the loss tangent angle tan δ =0.0002.

The arcs of the metal arcs (2, 4) are all 110 degrees, and the input and output interfaces (3, 7) are located at the center of the cavity wall to which they belong, and their heights are all 27 mm.

The bottom surface of the metal cavity has a length of 92 mm and a height of 50 mm, and the chamfer is set to R2 (radius is 2 mm); as shown in FIG. 1 , the inter-cavity coupling structure has a thickness of 4 mm and a height of 40 mm, wherein the cavity is coupled. The structure 9 has a window width of 18 mm, the vertical portion of the inter-cavity coupling structure 13 has a window width of 35 mm, and the horizontal portion has a window width of 18 mm.

The height of the medium tuning disk (6, 18) is 30 mm, the height of the medium tuning disk (11, 15) is 40 mm; the height of the medium tuning rods (8, 17) is 32 mm, the medium is tuned The height of the rods (10, 14) is 42 mm.

 The effects of the present invention can be further illustrated by the following simulations and test experiments:

 Simulation 1. In 3D electromagnetic simulation software HFSS The simulation of the embodiment of the present invention is performed, and the obtained double-passband filter response graph is shown by a broken line in FIG.

 Test 1. The processed double-passband filter is tested by a vector network analyzer, and the obtained double-passband filter response curve is shown by the solid line in FIG.

It can be seen from the response graph of the double-passband filter of FIG. 3 that the center frequencies of the two sub-passbands in the dual-passband filter of the embodiment are 1.80 GHz and 1.84 GHz, respectively, and the corresponding relative bandwidths are 1.9% and 1.1%, the insertion loss is 0.57dB and 0.53dB, the in-band return loss is 20dB, and the symmetric transmission zero point makes the filter have good frequency selectivity.

Example 2

As shown in FIG. 4 and FIG. 5, the TE mode three-pass dielectric filter includes a cavity 1, and six TE mode dielectric resonators (5, 19, 16, 12, 33) and six arranged in two rows in the cavity. Support columns (only 20, 22, 34 are shown), six media tuning levers (8, 17, 14, 10, 31, 28) and six media tuning disks (6, 18, 15, 11, 32) 29), the first metal arc 2, the second metal arc 4, the two input and output interfaces (3, 7), and the inter-cavity coupling structure; the first metal arc 2 and the first input and output The interface 3 is connected, the second metal arc 4 is connected to the second input/output interface 7; each of the six TE mode dielectric resonators is respectively provided with a support column, six dielectric tuning disks and six TE mode dielectric resonators. The arrangement relationship between the two is the next one and is concentric on the orthographic projection; the six dielectric tuning rods are respectively correspondingly located on the six medium tuning discs; in the six TE mode dielectric resonators, the first TE mode dielectric resonating 5, second TE mode dielectric resonator 19, third TE mode dielectric resonator 16, fourth TE mode dielectric resonator 12, fifth TE mode dielectric resonance 33. A sixth TE mode dielectric resonator 30; wherein the first medium tuning disk 6 and the second medium tuning disk 18 are of the same height, the third medium tuning disk 15 and the fourth medium tuning disk 11 are of the same height, and the fifth medium is tuned The disk 32 and the sixth media tuning disk 29 are the same height, and the first media tuning disk 6, the fourth media tuning disk 11, and the sixth media tuning disk 29 are in the same row and the height is sequentially increased; the first media tuning lever 8 and the first The two medium tuning rods 17 have the same height, the third medium tuning rod 14 and the fourth medium tuning rod 10 have the same height, and the fifth medium tuning rod 31 and the sixth medium tuning rod 28 have the same height, the first medium tuning rod 8 and the fourth medium. Tuning rod 10, sixth medium tuning rod 28 Located in the same row and increasing in height; the six TE mode dielectric resonators are coupled between the resonators through the inter-cavity coupling structure, and the input and output feedings are performed through the first metal arc 2 and the second metal arc 4 Coupling; the cavity 1 has a total of six resonant cavities arranged in the two rows; the first input-output interface 3 is located on the upper side of the upper left resonant cavity in the cavity 1, and the second input-output interface 7 is located in the upper right resonance of the cavity 1. The first metal arc 2 is located on the left side of the first input/output interface 3, and the second metal arc 4 is located above the input/output interface 7. The metal arc (2, 4) is set differently to set the transmission zero point on the left and right sides of the band. The support column, the dielectric tuning rod, the dielectric tuning disk, and the TE mode dielectric resonator 5 in each cavity are concentrically arranged. The first metal arc 2 and the second metal arc 4 are both concentric with the medium tuning disk in the resonant cavity in which they are located. Each of the support columns is fixed in the cavity 1 by screws 21, which are in one-to-one correspondence with the support columns and fixed by bonding. The length and width of the first metal arc 2 are equal to the length and width of the second metal arc 4, and the metal arc is welded to the corresponding input/output interface to form a filter feed structure.

The two input and output interfaces (3, 7) are located at the center of the cavity wall of the associated resonator. The coupling window formed by the inter-cavity coupling structure 13 is located between any two adjacent TE mode dielectric resonators, and the coupling window width between the third TE mode dielectric resonator 16 and the fourth TE mode dielectric resonator 12 is 0; the coupling window width between the sixth TE mode dielectric resonator 30 and the fifth TE mode dielectric resonator 33 is also zero.

 Further example embodiments are described below to illustrate a three-passband filter of six resonators.

Referring to Figures 4 and 5, the three-pass band pass filter of the present invention is mainly composed of six TE mode dielectric resonators (5, 12, 16, 19, 30, 33) and support columns (20, 22, 24). Media tuning lever (8, 10, 14, 17, 28, 31), first media tuning disk (6, 11, 15, 18, 29, 32), metal arc (2, 4) for control port coupling, input The output interface (3, 7), the cavity 1 and the inter-cavity coupling structure 13 are composed. among them:

The TE mode dielectric resonator uses a dielectric material having a dielectric constant of εr=37 and a loss tangent angle tan δ=0.0002; as shown in FIG. 5, the height is 13 mm, the outer diameter is 32 mm, and the inner hole diameter is 8 mm. The support columns are bonded. The support column is made of alumina material, the height is 7mm, the outer diameter is 19.5mm, the inner hole diameter is 13.5mm, the height is 4mm, and the inner hole of the lower layer is a threaded hole with a diameter of 3mm, through metal screws (21, 23, 26) Fixed in the cavity.

The medium tuning rod has a length of 35 mm and a diameter of 6 mm; the medium tuning disk has a length of 2 mm and a diameter of 25 mm; the dielectric tuning disk and the tuning rod are made of the same dielectric material, and the dielectric constant is εr=10, and the loss tangent angle tan δ =0.0002.

The arcs of the metal arcs (2, 4) are both 130 degrees, and the input and output interfaces (3, 7) are located at the center of the cavity wall to which they belong, and their heights are all 27 mm.

The bottom surface of the metal cavity has a length of 140 mm and a height of 50 mm, and the chamfer is set to R2 (radius is 2 mm); as shown in FIG. 6, the inter-cavity coupling structure has a thickness of 4 mm and a height of 40 mm, wherein the cavity is coupled. The width of the vertical portion of the structure 13 is 40 mm, the width of the window on the left side of the horizontal portion is 29 mm, the width of the window on the left side of the horizontal portion is 26 mm, and the width of the window on the right side of the horizontal portion is 26 mm. The window width is 26mm.

The media tuning disks (6, 18) are each 30 mm in height, the media tuning disks (11, 15) are each 35 mm in height, and the media tuning disks (29, 32) are each 40 mm in height; the media tuning rod (8, 17) The height is 32 mm, the height of the medium tuning rods (10, 14) is 37 mm, and the heights of the medium tuning rods (28, 31) are both 42 mm.

 The effects of the present invention can be further illustrated by the following simulations and test experiments:

 In 3D electromagnetic simulation software HFSS The second embodiment of the present invention is simulated, and the obtained three-pass band filter response graph is shown by a broken line in FIG.

The processed three-way band filter is tested by a vector network analyzer, and the obtained three-pass band filter response curve is shown by the solid line in FIG.

It can be seen from the response graph of the three-passband filter of FIG. 6 that the center frequencies of the three sub-passbands in the three-passband filter of the second embodiment are 1.788 GHz and 1.816, respectively. GHz and 1.845 GHz, the corresponding relative bandwidths are 0.9%, 1.3%, and 1.1%, respectively. The insertion loss is 0.57dB, 0.4dB, and 0.3dB, respectively. The in-band return loss is more than 18dB, and has a symmetric transmission zero point. The filter has good frequency selectivity.

The above examples are preferred embodiments of the invention and are not intended to limit the invention in any way. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Claims (9)

1. A TE mode multi-passband dielectric filter, comprising: a cavity (1), four TE mode dielectric resonators respectively arranged in the cavity at four corners of the cavity (5, 19, 16, 12), four support columns, four media tuning rods (8, 17, 14, 10) and four media tuning discs (6, 18, 15, 11), the first metal arc of the control port coupling ( 2), a second metal arc (4), two input and output interfaces (3, 7), and an inter-cavity coupling structure; the first metal arc (2) is connected to the first input/output interface (3), and second The metal arc (4) is connected to the second input/output interface (7); each of the four TE mode dielectric resonators is provided with a support column, between the four dielectric tuning disks and the four TE mode dielectric resonators. The arrangement relationship is the upper next correspondence and is concentric on the orthographic projection; the four medium tuning rods are respectively correspondingly located on the four medium tuning discs; the four TE mode dielectric resonators are sequentially the first TE mode dielectric resonators (5) a second TE mode dielectric resonator (19), a third TE mode dielectric resonator (16), and a fourth TE mode dielectric resonator (12);

   Wherein the first media tuning disk (6) and the second media tuning disk (18) are the same height, and the third media tuning disk (15) and the fourth media tuning disk (11) are the same height and higher than the first medium tuning disk. (6) height; the first medium tuning rod (8) and the second medium tuning rod (17) are of the same height, and the third medium tuning rod (14) and the fourth medium tuning rod (10) are the same height and higher than the first Media tuning lever (8) height;

   The four TE mode dielectric resonators perform coupling between the resonators through the inter-cavity coupling structure, and simultaneously input and output feed coupling through the first metal arc (2) and the second metal arc (4); the cavity ( 1) divided into four resonant cavities according to the four corners;

   The first input/output interface (3) is located on the upper side of the upper left resonator in the cavity (1), and the second input/output interface (7) is located on the right side of the upper right resonator in the cavity (1); The metal arc (2) is located on the left side of the first input/output interface (3), and the second metal arc (4) is located above the input/output interface (7).
2. A TE mode multi-passband dielectric filter characterized by comprising a cavity (1) in which six TE mode dielectric resonators (5, 19, 16, 12, 33) arranged in two rows are arranged, six Support columns, six media tuning levers (8, 17, 14, 10, 31, 28) and six media tuning discs (6, 18, 15, 11, 32, 29), control port coupled first metal circle An arc (2), a second metal arc (4), two input and output interfaces (3, 7), and an inter-cavity coupling structure; the first metal arc (2) is connected to the first input/output interface (3), The second metal arc (4) is connected to the second input/output interface (7); each of the six TE mode dielectric resonators is provided with a support column, six dielectric tuning disks and six TE mode dielectric resonators. The arrangement relationship between the two is the next one and is concentric on the orthographic projection; the six dielectric tuning rods are respectively correspondingly located on the six medium tuning discs; in the six TE mode dielectric resonators, the first TE mode dielectric resonating (5), a second TE mode dielectric resonator (19), a third TE mode dielectric resonator (16), a fourth TE mode dielectric resonator (12), a fifth TE mode dielectric resonator (33), a sixth TE mode dielectric resonator (30);

   Wherein the first media tuning disk (6) and the second media tuning disk (18) are of the same height, the third media tuning disk (15) and the fourth media tuning disk (11) are of the same height, and the fifth medium tuning disk (32) And the sixth medium tuning disk (29) is of the same height, and the first medium tuning disk (6), the fourth medium tuning disk (11), and the sixth medium tuning disk (29) are in the same row and the height is sequentially increased;

   The first medium tuning rod (8) and the second medium tuning rod (17) are of the same height, the third medium tuning rod (14) and the fourth medium tuning rod (10) are of the same height, the fifth medium tuning rod (31) and the The six media tuning levers (28) are of the same height, the first media tuning lever (8), the fourth media tuning lever (10), and the sixth media tuning lever (28) Located in the same row and in increasing height;

   The six TE mode dielectric resonators perform coupling between the resonators through the inter-cavity coupling structure, and simultaneously input and output feed coupling through the first metal arc (2) and the second metal arc (4); the cavity ( 1) a total of six resonant cavities arranged in the two rows;

   The first input/output interface (3) is located on the upper side of the upper left resonator in the cavity (1), and the second input/output interface (7) is located on the right side of the upper right resonator in the cavity (1); The metal arc (2) is located on the left side of the first input/output interface (3), and the second metal arc (4) is located above the input/output interface (7).
3. A TE mode multi-passband dielectric filter according to claim 1 or 2, wherein the support column, the dielectric tuning rod, the dielectric tuning disk and the TE mode dielectric resonator (5) in each cavity are concentric Settings.
4. A TE mode multi-passband dielectric filter according to claim 1 or 2, characterized in that the first metal arc (2) and the second metal arc (4) are both in the medium in the resonant cavity The tuning disk is concentric.
5. A TE mode multi-passband dielectric filter according to claim 1 or 2, wherein the four support columns are fixed in the cavity (1) by screws (21), the TE mode medium The resonators are in one-to-one correspondence with the support columns and are fixed by bonding.
6. A TE mode multi-passband dielectric filter according to claim 1 or 2, wherein the length and width of the first metal arc (2) are equal to the length and width of the second metal arc (4), and the metal The arc is welded to the corresponding input and output interface to form a filter feed structure.
7. A TE mode multi-passband dielectric filter according to claim 1 or 2, characterized in that the two input/output interfaces (3, 7) are located at the center of the cavity wall of the associated resonator.
8. The TE mode double passband dielectric filter according to claim 1, wherein the inter-cavity coupling structure comprises a first inter-cavity coupling structure (9) and a second inter-cavity coupling structure (13), the first cavity The inter-coupling structure (9) is located between the first TE mode dielectric resonator (5) and the fourth TE mode dielectric resonator (12); the second inter-cavity coupling structure (13) is formed by two mutually perpendicular structures Located between the first TE mode dielectric resonator (5) and the second TE mode dielectric resonator (19), between the second TE mode dielectric resonator (19) and the third TE mode dielectric resonator (16), a coupling structure between the three TE mode dielectric resonator (16) and the fourth TE mode dielectric resonator (12), and between the third TE mode dielectric resonator (16) and the fourth TE mode dielectric resonator (12) The coupling window width is 0.
9. The TE mode double passband dielectric filter according to claim 2, wherein the coupling window formed by the inter-cavity coupling structure (13) is located between any adjacent two TE mode dielectric resonators, and the third The coupling window width between the TE mode dielectric resonator (16) and the fourth TE mode dielectric resonator (12) is 0; the sixth TE mode dielectric resonator (30) and the fifth TE mode dielectric resonator (33) The width of the inter-coupling window is also zero.