An analytical approach to the design of multiple mode rectangular cavity waveguide filters
IEEE Transactions on Microwave Theory and Techniques
Institute of Electrical and Electronics Engineers Inc.
2857 - 2865
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The multiple mode rectangular cavity structure with square corner cuts is revisited. An attempt to predict the physical dimensions of the cavity for dual mode second-order and triple mode third-order filters is made. Analytic expressions are formed to be used in the design process. The classical triple mode cavity filter structure is altered to give a finite frequency transmission zero either in the lower or upper sideband of the center frequency. The concept is illustrated with example designs. A novel additive manufacturing technique is used to fabricate a selected filter structure. The experimental results are in agreement with the expectations.