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With the development of wireless communication technology , the filter having a small size, low insertion loss , excellent frequency selectivity characteristic . In this paper, the target study , is committed to the research and design of a miniaturized waveguide filter technology . First of all, filter design theory , the self-resonant diaphragm . Secondly, the self-resonant diaphragm and short-circuit stub research, including the length and breadth of the diaphragm openings in the diaphragm resonance frequency and the stub length , width and height for the zero frequency . Again , a systematic study of the self-resonant diaphragm and a short stub structure , analog bandwidth , frequency and its zero variation and control methods . The ultimate realization of the overall filter design and processing debugging . Finally, a new type of self-resonant diaphragm , and use it to design a filter . Processing and filter experimental samples tested , the test results agree well with the simulation results . The filter structure is effectively reduced size, can be widely used in electronic systems . Filter processing and debugging , device structure design error correction technology . Practice has proved that this method to optimize the processing errors , improve the filter tunability , improve product yield and achieved good results .
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