Multiplexing/demultiplexing an FDM of RF signal channels

Details Multiplexing/demultiplexing an FDM of RF signal channels Multiplexing/demultiplexing an FDM of RF signal channels

1997-05-05

1999-07-27

Olms, Douglas W.

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via frequency channels

333110, 333208, 333227, H04J 104

Patent

active

059302666

ABSTRACT:
A multiplexer comprises a number of directional filters 17.sub.n connected to a transmission line feeding an antenna 2, 3. Signals to be multiplexed fed to the filters 17.sub.n may be sent via respective switches 16.sub.n. Unlike prior multiplexers where each directional filter defines a respective channel of the multiplex, the channels of the multiplexer of the invention, apart from one at the end, are defined by the band pass response of one directional filter and the band stop response of another directional filter, since the band pass responses of the directional filters from the input connected to the switch to the output connected to the transmission line, and the corresponding band stop responses between the two output ports connected to the transmission line, overlap each other. The same arrangement may be used for demultiplexing.

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patent: 5184098 (1993-02-01), Kich et al.
patent: 5691987 (1997-11-01), Friederichs

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