Dielectric filter
A dielectric filter and ontology technology, applied in the field of communications, can solve the problems of inability to meet the filtering requirements and poor filter bandwidth selectivity.
Pending Publication Date: 2019-10-25
SUZHOU RF TOP ELECTRONICS COMM
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Problems solved by technology
However, the existing dielectric filters have poor filter bandwidth selectivity and cannot meet the actual filtering requirements.
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] Such as Figure 1-3 As shown, the dielectric filter of the present invention includes: the dielectric filter includes: a body 1 , a negative coupling structure 2 and a resonant cavity 3 arranged on the body 1 .
[0022] In an exemplary embodiment, the body 1 has a top surface 11 and a bottom surface 12, and the body 1 may specifically be a ceramic dielectric body 1 with a metal coating on the surface.
[0023] The negative coupling structure 2 is used ...
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The invention provides a dielectric filter. The dielectric filter includes a body, and a negative coupling structure and resonant cavities disposed on the body, wherein the body has a top surface anda bottom surface, the negative coupling structure includes a bottom blind groove arranged on the bottom surface of the body, a through hole arranged in the blind groove, a groove which is formed on the bottom surface of the body and is arranged along a groove port edge of the bottom blind groove and a top blind groove arranged at the top surface of the body, the bottom blind groove and the top blind groove are correspondingly arranged, the bottom blind groove, and the depth h, the length l and the width w of the bottom blind groove, and an inner diameter R1 and an outer diameter R2 of the groove are inversely proportional to the filtering bandwidth of the dielectric filter, the resonant cavities are distributed on two sides of the negative coupling structure, and any resonant cavity extends from the top surface of the body to the middle of the body. The dielectric filter is advantaged in that the negative coupling structure is arranged on the top surface of the body, the magnitude of the negative coupling amount of the filter can be adjusted, the filtering bandwidth of the filter is further controlled, and obtaining a filter with the required filtering bandwidth is facilitated.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a dielectric filter. Background technique [0002] Dielectric filters are important devices in microwave systems and are at the center of many design issues in radio technology. They are used to separate and combine different frequency signals. With the development of communication systems, the design requirements for dielectric filters are getting higher and higher. The required filters have high Q value, low loss, high selectivity, and at the same time ensure that the signal distortion is small, and have linear phase and other indicators. However, the existing dielectric filters have poor filter bandwidth selectivity and cannot meet the actual filtering requirements. Therefore, in view of the above problems, it is necessary to propose a further solution. Contents of the invention [0003] The present invention aims to provide a dielectric filter to overcome the defici...
Claims
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IPC IPC(8): H01P1/20H01P1/207
CPCH01P1/2002H01P1/207
Inventor 陈荣达陈国峰
Owner SUZHOU RF TOP ELECTRONICS COMM