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Practical Design Procedure of an Elliptic Function Dual-Mode Cavity Filter Coupled through a Non-zero-Thick Septum
Toshio ISHIZAKI Koichi OGAWA Hideyuki MIYAKE
IEICE TRANSACTIONS on Electronics
Publication Date: 1998/06/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Module Technology)
Category: Passive Element
dual-mode, elliptic function filter, coupling aperture, septum, thickness,
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Practical design procedure of a four-pole dual-mode cavity filter is explained in the details. Coupling matrix M of an elliptic function filter is derived analytically. The effects of septum thickness is studied experimentally. The dimensions of the aperture have to be modified due to the effects. This attempt had made the filter design very elegant, because no complicated calculation is required. A four-pole filter and a multiplexer are designed and constructed experimentally. They show very excellent performances in the 23 GHz band.