Double-mode ceramic waveguide filter

A waveguide filter and ceramic resonator technology, applied in the filter field, can solve the problems of large size and large loss, and achieve the effect of miniaturization
CN108376818AInactive Publication Date: 2018-08-07SUZHOU RF TOP ELECTRONICS COMM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUZHOU RF TOP ELECTRONICS COMM
Publication Date
2018-08-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a double-mode ceramic waveguide filter which adopts two ceramic resonators connected with each other side by side. By adopting the double-mode ceramic waveguide filter providedby the invention, two vertical electromagnetic fields are generated on one ceramic resonator to form two resonant cavities to generate two resonant frequencies respectively, so that the loss ratio ofthe double-mode ceramic waveguide filter is less compared with that of the existing ceramic waveguide filter, and the size of the double-mode ceramic waveguide filter can also be reduced to a half; the side end surfaces, back away from each other, of the ceramic resonator are each provided with a straight line region, the other side end surfaces, facing each other, of the ceramic resonators are each provided with a cross line region, and debugging holes and electric coupling holes are formed in the side surface connecting the two side end surfaces; the centers of the two regions are located in one straight line, the straight line region and the debugging holes are located on one horizontal plane; the electric coupling holes are located below the straight line region and form an included angle of 45 degrees, and the two debugging holes are located on same side of the two ceramic resonators; and the outer surfaces of the two ceramic resonators are wholly metallized to form a metal layer, and a metal layer in the straight line region and a metal layer in the cross line region are removed.
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Description

technical field

[0001] The invention relates to a filter in the technical field of filters, and more specifically relates to a dual-mode ceramic waveguide filter. Background technique

[0002] With the rapid development of mobile communication, navigation technology and electronic countermeasures, higher requirements are put forward for the size and performance improvement of existing filters. Insertion loss, out-of-band spurious response, out-of-band rejection, Q value and size are the core key indicators of filters. How to reduce the size of ceramic waveguide filters under the premise of providing higher performance indicators is a technical problem in this field .

[0003] At present, ceramic waveguide filters are composed of multiple resonators arranged in a row, but one resonator only resonates at one frequency, which leads to relatively large loss and relatively large size of the existing ceramic waveguide filters. Contents of the invention

[0004] The purpose of ...

Claims

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