A design technique for stepped circular waveguide dual-mode filters for broadband contiguous multiplexers

Summary form only given, as follows. A stepped circular waveguide cavity provides an effective way for shifting or even suppressing unwanted spurious modes in a circular waveguide dual-mode filter. This useful property may be used in a wideband waveguide contiguous channel output multiplexer in satellite payloads. In this paper, a technique for automatically designing this kind of filter is presented. A design example of a wideband 17-channel Ku-band contiguous multiplexer with two SCWDM channel filters is presented.