Coupling structure of bi-pass dielectric filter
By designing a dual-pass dielectric filter coupling structure in a dielectric filter, using an integrated ceramic body and multiple frequency resonant rods, and through structural adjustments such as high-frequency negative coupling and cross-coupling, the existing dielectric filter coupling structure cannot adapt to the wider passband, and the effective filtering and structure of the wider passband are achieved.
Patent Information
- Application Number
- CN202422077980.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The existing dielectric filter coupling structure is long and cannot adapt to the wider passband, resulting in the inability to efficient filtering.
A dual-pass dielectric filter coupling structure is designed, using an integrated ceramic body and multiple frequency resonant rods, and through structural adjustments such as high-frequency negative coupling and cross-coupling, flexible adjustment of the filter bandwidth is achieved.
Effective filtering of a wider passband is realized, the flexibility of port delay is improved, the structure is simplified, the production cost and debugging difficulty is reduced, and the design diversity is improved.
Smart Images
Figure CN222966311U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of filters, in particular to a coupling structure of a dual-pass dielectric filter. Background Technique
[0002] A dielectric filter is an electronic component that filters electrical signals using the electrical properties of dielectric materials. It usually uses dielectric materials with high dielectric constants (such as ceramics, quartz, etc.) to make resonators, and realizes the filtering effect on specific frequency signals through the coupling between resonators. Dielectric filters have the advantages of high Q value, low insertion loss, small size, light weight, etc., and are widely used in systems such as wireless base stations, satellite communications, navigation systems, and electronic countermeasures.
[0003] The existing coupling structure is relatively long, and the length determines the coupling strength. The relatively long coupling structure cannot adapt to a relatively wide passband; therefore, we propose a coupling structure of a dual-pass dielectric filter to solve the problems mentioned above. Content of the Utility Model
[0004] The purpose of the utility model is to provide a coupling structure of a dual-pass dielectric filter to solve the problem that the existing coupling structure is relatively long, the length determines the coupling strength, and the relatively long coupling structure cannot adapt to a relatively wide passband mentioned in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A coupling structure of a dual-pass dielectric filter, including an integrated ceramic body;
[0006] It further includes:
[0007] A first dual-pass filter common frequency resonance rod, which is arranged on the left side of the surface of the integrated ceramic body. A second dual-pass filter common frequency resonance rod is arranged on the right side of the surface of the integrated ceramic body. One end of the surface of the integrated ceramic body is respectively provided with a fifth dual-pass band common cavity frequency resonance rod, a sixth dual-pass band common cavity frequency resonance rod, a seventh dual-pass band common cavity frequency resonance rod, an eighth dual-pass band common cavity frequency resonance rod, a ninth dual-pass band common cavity frequency resonance rod and a tenth dual-pass band common cavity frequency resonance rod. The other end of the surface of the integrated ceramic body is provided with a first dual-pass band common cavity frequency resonance rod, a second dual-pass band common cavity frequency resonance rod, a third dual-pass band common cavity frequency resonance rod and a fourth dual-pass band common cavity frequency resonance rod. A first high-frequency negative coupling is arranged between the fifth dual-pass band common cavity frequency resonance rod and the first dual-pass filter common frequency resonance rod, and a second high-frequency negative coupling is arranged between the tenth dual-pass band common cavity frequency resonance rod and the second dual-pass filter common frequency resonance rod.
[0008] Preferably, a first cross-coupling is arranged at one end of the surface of the integrated ceramic body, and a second cross-coupling is arranged at the other end of the surface of the integrated ceramic body.
[0009] Preferably, a low-frequency positive coupling is provided between the common frequency resonance rod of the first diplex filter and the common cavity frequency resonance rod of the first diplex band, and a low-frequency negative coupling is provided between the common cavity frequency resonance rod of the fourth diplex band and the common frequency resonance rod of the second diplex filter.
[0010] Preferably, high and low end coupling isolation grooves are provided on the surface of the integrated ceramic body.
[0011] Preferably, an input tap coupling is connected to one end of the common frequency resonance rod of the first diplex filter, and an output tap coupling is connected to one end of the common frequency resonance rod of the second diplex filter.
[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0013] 1. Compared with the original structure of hole coupling, the present application can more flexibly adjust the diplex band ANT coupling structure, can flexibly adjust the filter bandwidth structure, and improves the port delay flexibility. The coupling influence between ports is eliminated, the structure is simpler, more conducive to production, and the production cost and debugging difficulty are reduced.
[0014] 2. While maintaining the adjustable coupling amount of the input and output through the first high-frequency negative coupling and the second high-frequency negative coupling, the design diversity is improved. At the same time, the filter structure can be satisfied. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic diagram of the integrated ceramic structure of the present utility model;
[0016] Figure 2 is a front view of the overall structure of the present utility model;
[0017] Figure 3 is a side sectional view of the integrated ceramic structure of the present utility model;
[0018] In the figure: 1. First dual-pass filter common frequency resonance rod; 2. First dual-passband ordinary cavity frequency resonance rod; 3. Second dual-passband ordinary cavity frequency resonance rod; 4. Third dual-passband ordinary cavity frequency resonance rod; 5. Fourth dual-passband ordinary cavity frequency resonance rod; 6. Second dual-pass filter common frequency resonance rod; 7. Fifth dual-passband ordinary cavity frequency resonance rod; 8. Sixth dual-passband ordinary cavity frequency resonance rod; 9. Seventh dual-passband ordinary cavity frequency resonance rod; 10. Eighth dual-passband ordinary cavity frequency resonance rod; 11. Ninth dual-passband ordinary cavity frequency resonance rod; 12. Tenth dual-passband ordinary cavity frequency resonance rod; 13. First high-frequency negative coupling; 14. Second high-frequency negative coupling; 15. First cross-coupling; 16. Second cross-coupling; 17. Input tap coupling; 18. Output tap coupling; 19. Low-frequency positive coupling; 20. Low-frequency negative coupling; 21. High and low end coupling isolation groove; 22. Integrated ceramic body. Detailed implementation mode
[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0020] Please refer to Figures 1-3 , an embodiment provided by the present invention: A coupling structure of a dual-pass dielectric filter, including an integrated ceramic body 22;
[0021] It further includes:
[0022] The first dual-pass filter common frequency resonance rod 1 is arranged on the left side of the surface of the integrated ceramic body 22. The second dual-pass filter common frequency resonance rod 6 is arranged on the right side of the surface of the integrated ceramic body 22. One end of the surface of the integrated ceramic body 22 is respectively provided with the fifth dual-passband ordinary cavity frequency resonance rod 7, the sixth dual-passband ordinary cavity frequency resonance rod 8, the seventh dual-passband ordinary cavity frequency resonance rod 9, the eighth dual-passband ordinary cavity frequency resonance rod 10, the ninth dual-passband ordinary cavity frequency resonance rod 11 and the tenth dual-passband ordinary cavity frequency resonance rod 12. The other end of the surface of the integrated ceramic body 22 is provided with the first dual-passband ordinary cavity frequency resonance rod 2, the second dual-passband ordinary cavity frequency resonance rod 3, the third dual-passband ordinary cavity frequency resonance rod 4 and the fourth dual-passband ordinary cavity frequency resonance rod 5. A first high-frequency negative coupling 13 is arranged between the fifth dual-passband ordinary cavity frequency resonance rod 7 and the first dual-pass filter common frequency resonance rod 1. A second high-frequency negative coupling 14 is arranged between the tenth dual-passband ordinary cavity frequency resonance rod 12 and the second dual-pass filter common frequency resonance rod 6.
[0023] This application can more flexibly adjust the dual-band ANT coupling structure, can flexibly adjust the filter bandwidth structure, and improves the flexibility of port delay. It eliminates the coupling effect between ports, has a simpler structure, is more conducive to production, reduces production costs and debugging difficulties.
[0024] Please refer to Figure 2 , at one end of the surface of the integrated ceramic body 22, a first cross-coupling 15 is provided, and at the other end of the surface of the integrated ceramic body 22, a second cross-coupling 16 is provided.
[0025] Please refer to Figure 2 , a low-frequency positive coupling 19 is provided between the first dual-band filter common frequency resonance rod 1 and the first dual-band ordinary cavity frequency resonance rod 2, and a low-frequency negative coupling 20 is provided between the fourth dual-band ordinary cavity frequency resonance rod 5 and the second dual-band filter common frequency resonance rod 6.
[0026] Please refer to Figure 1 , a high-low end coupling isolation groove 21 is provided on the surface of the integrated ceramic body 22 for isolating high and low end frequencies.
[0027] Please refer to Figure 2 , an input tap coupling 17 is connected to one end of the first dual-band filter common frequency resonance rod 1, and an output tap coupling 18 is connected to one end of the second dual-band filter common frequency resonance rod 6, which can maximize the enhancement of tap delay.
[0028] Working principle: The input tap coupling 17 is directly connected to the first dual-band filter common frequency resonance rod 1 to form an ultra-wide delay structure, and then from the first high-frequency negative coupling 13 to high-low frequencies or low frequencies. At the same time, the delay from the first section to the second section can be adjusted through coupling, thereby adjusting the bandwidth.
[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.
Claims
1. A dual-pass dielectric filter coupling structure, comprising an integrated ceramic body (22); Features: Also includes: A first double-pass filter common frequency resonance rod (1) is arranged on the left side of the surface of the integrated ceramic body (22); a second double-pass filter common frequency resonance rod (6) is arranged on the right side of the surface of the integrated ceramic body (22); and a fifth double-passband common cavity frequency resonance rod (7), a sixth double-passband common cavity frequency resonance rod (8), a seventh double-passband common cavity frequency resonance rod (9), an eighth double-passband common cavity frequency resonance rod (10), a ninth double-passband common cavity frequency resonance rod (11) and a tenth double-passband common cavity frequency resonance rod ( 12), a first dual-passband common cavity frequency resonance rod (2), a second dual-passband common cavity frequency resonance rod (3), a third dual-passband common cavity frequency resonance rod (4) and a fourth dual-passband common cavity frequency resonance rod (5) are arranged at the other end of the surface of the integrated ceramic body (22), a first high-frequency negative coupling (13) is arranged between the fifth dual-passband common cavity frequency resonance rod (7) and the first dual-pass filter common frequency resonance rod (1), and a second high-frequency negative coupling (14) is arranged between the tenth dual-passband common cavity frequency resonance rod (12) and the second dual-pass filter common frequency resonance rod (6).
2. A dual-pass dielectric filter coupling structure according to claim 1, characterized in that: A first cross-coupling (15) is provided at one end of the surface of the integrated ceramic body (22), and a second cross-coupling (16) is provided at the other end of the surface of the integrated ceramic body (22).
3. A dual-pass dielectric filter coupling structure according to claim 1, characterized in that: A low-frequency positive coupling (19) is provided between the first dual-pass filter common frequency resonance rod (1) and the first dual-passband common cavity frequency resonance rod (2), and a low-frequency negative coupling (20) is provided between the fourth dual-passband common cavity frequency resonance rod (5) and the second dual-pass filter common frequency resonance rod (6).
4. A dual-pass dielectric filter coupling structure according to claim 1, characterized in that: A high-low end coupling isolation groove (21) is provided on the surface of the integrated ceramic body (22).
5. A dual-pass dielectric filter coupling structure according to claim 1, characterized in that: One end of the common frequency resonance rod (1) of the first double-pass filter is connected to an input tap coupling (17), and one end of the common frequency resonance rod (6) of the second double-pass filter is connected to an output tap coupling (18).