CN212062649U - TEM mode dielectric microwave resonator and filter - Google Patents
TEM mode dielectric microwave resonator and filter Download PDFInfo
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- CN212062649U CN212062649U CN202020415716.9U CN202020415716U CN212062649U CN 212062649 U CN212062649 U CN 212062649U CN 202020415716 U CN202020415716 U CN 202020415716U CN 212062649 U CN212062649 U CN 212062649U
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Abstract
The utility model provides a TEM mode medium microwave syntonizer, syntonizer R's both ends are open a way. The resonator R is tubular, the inner cavity and the outer pipe wall of the resonator R are respectively provided with a metal film layer, and the two end faces of the resonator R directly expose the ceramic dielectric body. A coupling circuit is formed by coupling units C1 and C2 … … CN +1 between an input port P1 and an output port P2 of the TEM mode dielectric microwave filter, resonator units R1 and R2 … … RN +1, wherein the two ends of each of the resonator units are open-circuited, and the resonator units R1 and R2 … … RN +1 are a plurality of half-wavelength resonators, are connected between the coupling units C1 and C2 … … CN + 1. According to the technical scheme, the length of the resonator designed by using the half-wavelength is twice that of the original quarter-wavelength resonator, so that the problem of high processing difficulty is solved, the Q value of the resonator is improved, and the problem of poor performance of the filter is solved.
Description
Technical Field
The utility model relates to a microwave components and parts specifically say microwave filter.
Background
The TEM mode dielectric resonator is a common microwave element and is characterized by small volume and excellent Q value; the length of the resonator can be flexibly adjusted by selecting media with different dielectric constants when the frequency is fixed. Therefore, the TEM mode dielectric resonators are widely applied to microwave filters, and the traditional TEM mode resonators are designed by adopting a quarter-wavelength theory and are characterized in that one end of the TEM mode dielectric resonators is open and the other end of the TEM mode dielectric resonators is short-circuited; when the frequency of the filter is higher, the quarter-wave resonator is shorter, and if the resonator is short to a certain extent, the production and processing aspects cannot be realized; and the Q value becomes worse as the length is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a TEM mode medium microwave resonator and a microwave filter composed of the same, wherein the actual size of the resonator is large and convenient to process and assemble under the high-frequency use environment;
the second purpose is to meet the high frequency filtering requirements of the filter.
The utility model aims at adopting following technical scheme to realize, a TEM mode medium microwave syntonizer, its characterized in that: both ends of the resonator R are open.
The resonator R is tubular, the inner cavity and the outer pipe wall of the resonator R are respectively provided with a metal film layer, and the two end faces of the resonator R directly expose the ceramic dielectric body.
The TEM mode dielectric microwave filter is characterized in that: coupling units C1 and C2 … … CN +1 form a coupling circuit between the input port P1 and the output port P2, resonator units R1 and R2 … … RN +1 with two open ends are connected between the coupling units C1 and C2 … … CN +1, and the resonator units R1 and R2 … … RN +1 are a plurality of half-wavelength resonators.
According to the technical scheme, the length of the resonator designed by using the half-wavelength is twice that of the original quarter-wavelength resonator, so that the problem of high processing difficulty is solved, the Q value of the resonator is improved, and the problem of poor performance of the filter is solved.
Brief description of the drawings
FIG. 1 is a schematic diagram of a resonator structure;
fig. 2 is a circuit schematic of the filter.
Detailed Description
Example 1
As shown in fig. 1, in the TEM mode dielectric microwave resonator, both ends of the resonator R are open.
The preferable structure is that the resonator R is tubular, the inner cavity and the outer pipe wall of the resonator R are laid with metal film layers, and two end faces of the resonator R are directly exposed out of the ceramic dielectric body. The resonator R in the attached figures can be seen as a tube, the tube body 1 adopts a ceramic medium, and the outer tube wall and the inner tube wall are coated with metal film layers, particularly silver coating layers 2. The ceramic dielectric body is directly exposed without silver plating layers at two ends.
Under the condition of the same material and the same resonance frequency, the length of the half-wavelength resonator is twice that of the quarter-wavelength resonator; for example, when the dielectric constant ER of the material is 36, the frequency is 6000
The length of the half-wavelength resonator at MHz is 4.16mm and the length of the quarter-wavelength resonator is 2.08 mm. The lengths of the half and quarter wave resonators are 2.08 and 1.04 respectively when the frequency is increased to 12000 MHz. As the frequency is further increased, the length of the resonator becomes shorter and shorter, and the quarter-wave resonator becomes more difficult to process. While the half wavelength process is relatively difficult.
The Q value of the half-wave resonator is better than that of the quarter-wave resonator, the comprehensive performance of the filter made of the half-wave resonator is better than that of the filter made of the quarter-wave resonator, and the indexes such as pass band loss, in-band fluctuation and the like of the filter are superior.
Example 2
A coupling circuit is formed by coupling units C1 and C2 … … CN +1 between an input port P1 and an output port P2, a resonator unit R1 and a resonator unit R2 … … RN +1 are connected between the coupling units C1 and C2 … … CN +1, the two ends of the resonator unit R1 and the two ends of the resonator unit R2 … … RN +1 are both open-circuited, and the resonator units R1 and R2 … … RN +1 are a plurality of half-wavelength resonators. The Q value of the half-wave resonator is better than that of the quarter-wave resonator, the comprehensive performance of the filter made of the half-wave resonator is better than that of the filter made of the quarter-wave resonator, and the indexes such as pass band loss, in-band fluctuation and the like of the filter are superior.
Claims (2)
1. A TEM mode dielectric microwave resonator characterized by: both ends of the resonator R are open;
the resonator R is tubular, the inner cavity and the outer pipe wall of the resonator R are respectively provided with a metal film layer, and the two end faces of the resonator R directly expose the ceramic dielectric body.
2. A TEM mode dielectric microwave filter is characterized in that: coupling units C1 and C2 … … CN +1 form a coupling circuit between the input port P1 and the output port P2, resonator units R1 and R2 … … RN +1 with two open ends are connected between the coupling units C1 and C2 … … CN +1, and the resonator units R1 and R2 … … RN +1 are a plurality of half-wavelength resonators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020415716.9U CN212062649U (en) | 2020-03-27 | 2020-03-27 | TEM mode dielectric microwave resonator and filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020415716.9U CN212062649U (en) | 2020-03-27 | 2020-03-27 | TEM mode dielectric microwave resonator and filter |
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| CN212062649U true CN212062649U (en) | 2020-12-01 |
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| CN202020415716.9U Active CN212062649U (en) | 2020-03-27 | 2020-03-27 | TEM mode dielectric microwave resonator and filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022126393A1 (en) * | 2020-12-15 | 2022-06-23 | 华为技术有限公司 | Dielectric filter, transceiver, and base station |
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2020
- 2020-03-27 CN CN202020415716.9U patent/CN212062649U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022126393A1 (en) * | 2020-12-15 | 2022-06-23 | 华为技术有限公司 | Dielectric filter, transceiver, and base station |
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