Microwave filter
A microwave filter and ontology technology, applied in the field of communication, can solve the problems such as the inability to meet the filtering requirements and the poor filter bandwidth selectivity.
Pending Publication Date: 2019-11-12
SUZHOU RF TOP ELECTRONICS COMM
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Problems solved by technology
However, the existing microwave filters have poor filter bandwidth selectivity and cannot meet the actual filtering requirements.
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[0018] 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.
[0019] Such as figure 1 , 2 As shown, the microwave filter of the present invention includes: the microwave filter includes: a body 1 , a negative coupling structure 2 and a resonant cavity 3 arranged on the body 1 .
[0020] 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.
[0021] The negative coupling structure 2 is used ...
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The present invention provides a microwave filter comprising a body, and a negative coupling structure and resonant cavities that are disposed on the body, wherein the body has a top surface and a bottom surface; the negative coupling structure is disposed on the top surface of the body and includes a blind groove formed in the top surface of the body, a through hole formed in the blind groove, and a groove formed on the top surface of the body and along the notch edge of the blind groove; the depth h, the length l, and the width w of the blind groove and the inner diameter R1 and the outer diameter R2 of the groove are directly proportional to the filter bandwidth of the microwave filter; the resonant cavities are distributed on both sides of the negative coupling structure; and any one of the resonant cavities extends from the top surface of the body to the central portion of the body. The negative coupling structure is disposed on the top surface of the body so as to adjust the magnitude of the negative coupling amount of the microwave filter, thereby controlling the filter bandwidth of the microwave filter, and contributing to obtaining the microwave filter having a required filtering bandwidth.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a microwave filter. Background technique [0002] Microwave 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 microwave 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 microwave 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 microwave filter to overcome the deficiencie...
Claims
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IPC IPC(8): H01P1/203
CPCH01P1/203
Inventor 陈荣达陈国峰
Owner SUZHOU RF TOP ELECTRONICS COMM