Microwave filter with a wide spurious-free band-stop response

Details Microwave filter with a wide spurious-free band-stop response Microwave filter with a wide spurious-free band-stop response

1991-09-25

1993-10-19

Mottola, Steven

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333135, 333212, H01P 1208, H01P 512

Patent

active

052549631

ABSTRACT:
The present invention is directed to reducing the number of components required to minimize intermodulation distortion within the wide transmission frequency band used by a satellite communications repeater system. In particular, at least two TM.sub.010 mode cavity is cascaded to a plurality of TE.sub.113 mode cavities to form a narrow band-pass, wide band-stop filter for receiving and outputting channel signals to the multiplexer manifold of a satellite repeater. The filter thus constructed realizes the narrow band-pass response required in microwave communications, while eliminating the spurious resonance frequencies normally eliminated by additional filter components. In this manner, the size and weight considerations of the satellite system are improved without loss in performance.

REFERENCES:
patent: 4267537 (1981-05-01), Karmel
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patent: 4489293 (1984-12-01), Fiedziuszko
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patent: 4734665 (1988-03-01), Rosenberg et al.
patent: 4777459 (1988-10-01), Hudspeth
patent: 4792771 (1988-12-01), Siu
patent: 4996506 (1991-02-01), Ishikawa et al.

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