A wide band contiguous multiplexer having a contiguous diplexer

摘要

An extended band, multiple channel multiplexer (10) for use with satellite communication systems utilizes a low attenuation, contiguous diplexer (18) containing contiguous diplexer filters (18a) to combine two sections (11a) and (11b) of the multiplexer respectively containing contiguous channel filters (14a) and (14b). The contiguous diplexer filters (18a) are tuned in tandem with channel filters (14a) and (14b) to provide contiguous multiplexing. This approach takes advantage of the constructive interaction bnetween these filters to realise an equivalent contiguous mulitplexer. This enables realisation of a wide band contiguous multiplexer, which heretofore was impossible to tune. The contiguous diplexer eliminates spurious modes of the channel and diplexer filters, spurious waveguide modes, and out of band interation between the two portions of the multiplexer.