Microwave phase shifter with 0 or .pi. phase shift

Details Microwave phase shifter with 0 or .pi. phase shift Microwave phase shifter with 0 or .pi. phase shift

1989-10-23

1991-04-09

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

307262, 307511, 333138, H03H 718, H03C 300

Patent

active

050068237

ABSTRACT:
Disclosed is a microwave phase shifter which is capable, in response to a control signal, of generating either a phase shift that is substantially zero or a phase shift that is substantially equal to .pi.. It comprises a FET that is preferably symmetrical and works in an amplifier assembly. Low-frequency switching-over means make it possible, by reversing the biases at the source and the drain, to invert the FET. This inverting causes a phase shift by .pi. in the microwave signal taken at the output of the circuit.

REFERENCES:
patent: 3590285 (1971-06-01), Hargrove
patent: 3626216 (1971-12-01), Bergman
patent: 4647789 (1987-03-01), Upadhyayula
patent: 4700153 (1987-10-01), Salvage et al.
patent: 4857777 (1989-08-01), Altes
Tsai et al., "Switching & Frequency Conversion Using Dual-Gate FETS", 9th European Microwave Conf. Sept., 17-20, 1979, pp. 311-315.

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