Amplitude balanced diode phase shifter

Details Amplitude balanced diode phase shifter Amplitude balanced diode phase shifter

1977-06-29

1978-08-08

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

With impedance matching

333 11, 333 84M, H01P 308, H01P 118, H01P 122

Patent

active

041059590

ABSTRACT:
A hybrid coupled phase shifter for introducing a predetermined phase shift in a microwave frequency signal includes a four port transmission line network. RF input and output terminals are connected to two of the ports and a pair of PIN diodes connected to the other ports. The diodes are biased from a conducting to a nonconducting state to provide a reflective phase shift in the microwave signal. Highly resistive material is suitably disposed on the transmission lines such that at the diode conducting state the resistive material is decoupled from the RF power and coupled at the diode non-conducting state to a predetermined value to thereby balance the insertion loss between the diode switching states.

REFERENCES:
patent: 3400405 (1968-09-01), Patterson, Jr.
patent: 3422378 (1969-01-01), La Rosa
patent: 3571762 (1971-03-01), Smilen
patent: 3585533 (1971-06-01), Denhard

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