A design technique for stepped circular waveguide dual-mode filters for broadband contiguous multiplexers
Refereed conference paper presented and published in conference proceedings

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AbstractA stepped circular waveguide cavity provides an effective way for shifting or even suppressing unwanted spurious modes in a circular waveguide dual-mode (CWDM) filter. This useful property may be used in a wideband waveguide contiguous channel output multiplexer (OMUX) in satellite payloads. In this paper, a technique for automatically designing a stepped circular waveguide dual-mode (SCWDM) filter is presented. A K-inverter model of a short-circuited multi-port network is proposed to find the physical dimensions of a SCWDM filter in an iterative fashion. By taking into account the self-couplings as well as the effect of the stepped waveguide, without requiring optimization, this design process only needs EM simulation at the center frequency of the filter. The rapidly-convergent solution corresponds to the desired coupling matrix circuit model very well. A design example of a wideband 17-channel Ku-band contiguous multiplexer with two SCWDM channel filters is presented, in which the EM designed multiplexer responses match closely those of the synthesized circuit model. © 2011 IEEE.
All Author(s) ListHu H., Wu K.-L., Cameron R.J.
Name of Conference2011 IEEE MTT-S International Microwave Symposium, IMS 2011
Start Date of Conference05/06/2011
End Date of Conference10/06/2011
Place of ConferenceBaltimore, MD
Country/Region of ConferenceUnited States of America
Detailed descriptionorganized by IEEE MTT-S,
LanguagesEnglish-United Kingdom
Keywordscontiguous multiplexers, dual-mode waveguide filters

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