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Article: Multiplexing with high performance directional filters.
- Article from:
- Microwave Journal
- Article date:
- June 1, 1989
- Author:
CopyrightCOPYRIGHT 1989 Horizon House Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Multiplexing with High Performance Directional Filters
Introduction
A directional filter was developed by Hughes' engineers Rolf Kich and Paul Tatomir. Highlights of their innovative design are
* No restriction on the filter type, Chebyshev, elliptic, Butterworth, bandpass, highpass or lowpass
* Nominal directivity of 20 to 25 dB
* Combined losses nearly identical to those incurred when combining channels on a short-circuited manifold
* Good broadband impedance match at the common port, typically over 20dB return loss across the entire multiplexing band.