Microwave phase shifter

Details Microwave phase shifter Microwave phase shifter

1983-03-01

1985-03-26

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

333 11, 333157, 333262, H01P 118

Patent

active

045076294

ABSTRACT:
A phase shifter utilizing a circulator and electronic switches to change the length of a transmission line is disclosed. More specifically, a section of transmission line terminated in a short circuit is coupled to one port of a circulator. Energy exiting the port is reflected by the short circuited transmission line to introduce a phase delay in the signal. A PIN diode is utilized to provide a switchable short across the transmission line to reduce its electrical length thereby reducing the phase delay.

REFERENCES:
patent: 3423699 (1969-01-01), Hines
patent: 3448414 (1939-06-01), Brunton
patent: 3656069 (1972-04-01), Beccone et al.
patent: 3718873 (1973-02-01), Garver
patent: 3803625 (1974-04-01), Nemit
White-"Diode Phase Shifters for Array Antennas", Reprint from IEEE Trans. on Microwave Theory and Techniques, vol. MTT-22, No. 6, Jun. 1974; Title Page, pp. 1-17.

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