Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1985-01-11
1986-09-30
LaRoche, Eugene R.
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333212, H01P 512, H01P 1208
Patent
active
046149201
ABSTRACT:
A multiplexer has a plurality of bandpass filters coupled through E-plane or H-plane T-junctions to a waveguide manifold. Where the multiplexer has four channels and each filter is a six-pole filter, two triple mode cavities make up each filter. Where each filter is a five-pole filter, one triple cavity and one dual mode cavity makes up each filter. Two band edge channel filters are operated to produce an asymmetrical filter function response, thereby causing extra transmission zeros to be created and improving the selectivity of the filter out of the passband. The multiplexer is designed for use in satellite communication systems and can have a reduced volume and weight when compared to previous multiplexers without any sacrifice in electrical performance.
REFERENCES:
patent: 2686902 (1954-08-01), Tillotson
patent: 4129840 (1978-12-01), Mok
patent: 4135133 (1979-01-01), Mok
patent: 4200847 (1980-04-01), Nishikawa et al.
patent: 4410865 (1983-10-01), Young et al.
Edson et al; "Input Manifold for Microwave Channelizing Filters"; IEEE Transaction on Microwave Theory & Technique; vol. M77-18, No. 5, 5/1970; pp. 270-276.
Com Dev Ltd.
LaRoche Eugene R.
Lee Benny T.
Schnurr Daryl W.
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