Broadband directional coupler

Details Broadband directional coupler Broadband directional coupler

1995-06-07

1996-10-29

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333116, H01P 518

Patent

active

055700691

ABSTRACT:
A directional coupler having a broadband frequency response comprises a pair of parallel TEM transmission lines having an input port, a thru port, a coupled port, and an isolation port. A quarter-wave, short circuited transmission line coupled to the thru port, and a half-wave, open circuited transmission line coupled to the isolation port functions to flatten the frequency response between the input port and the thru port and between the input port and the coupled port and to increase the operating bandwidth of the directional coupler.

REFERENCES:
patent: 3600707 (1971-08-01), Friedman
patent: 3723913 (1973-03-01), Seidel
patent: 4127831 (1978-11-01), Riblet
patent: 4216446 (1980-08-01), Iwer
patent: 4419635 (1983-12-01), Reindel
patent: 4814780 (1989-03-01), Sterns et al.
patent: 5075646 (1991-12-01), Morse

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