Wide band contiguous multiplexer having a contiguous diplexer

Details Wide band contiguous multiplexer having a contiguous diplexer Wide band contiguous multiplexer having a contiguous diplexer

1998-09-09

1999-12-28

Bettendorf, Justin P.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333135, H01P 1213

Patent

active

060087064

ABSTRACT:
An extended band, multiple channel multiplexer 10 well-suited for use with satellite communications systems. The multiplexer utilizes a low attenuation, contiguous diplexer 18 containing contiguous diplexer filters 18a to combine two sections 11a, 11b of the multiplexer respectively containing contiguous channel filters 14a, 14b. The multiplexer comprises low attenuation, contiguous diplexer filters 18a tuned in tandem with channel filters 14a, 14b to provide contiguous multiplexing. This approach takes advantage of the constructive interaction between these filters to realize an equivalent contiguous multiplexer. This enables realization 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 interaction between the two portions of the multiplexer. Therefore, tuning of the multiplexer is possible.

REFERENCES:
patent: 3865990 (1975-02-01), Kuenemund
patent: 5604747 (1997-02-01), Callas

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