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Design of triple mode TE01δ resonator transmissionfilters
Authors:Walker  V Hunter  IC
Affiliation:Filtronic plc, Saltaire;
Abstract:The use of triple mode TE01δ cubic resonators for the design of transmission mode filters is presented. Frequency tuning and coupling between modes are studied experimentally. The tunability of all inter-cavity couplings, necessary for the realization of a wide range of transfer functions, is demonstrated with a 6th degree, 5 MHz wide filter at 2 GHz. With an insertion loss of 0.7 dB in a volume of 260 cm3, the filter presents a 2:1 volume reduction over conventional TE01δ filters
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