Microwave circulator

Details Microwave circulator Microwave circulator

1978-03-13

1980-03-25

Gensler, Paul L.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

333 11, 333246, G01S 950

Patent

active

041952960

ABSTRACT:
A signal detection device for a Doppler radar system comprising a circulator having an input, an antenna and a detector port. The signal at the detector port comprises the echo signal received at the antenna port and a small portion of the signal to be transmitted applied at the input port, the latter having a phase which varies transversely across the detector port. The detection device further includes a pair of detectors each connected to one of two points transversely spaced across the detector port for producing output signal of a frequency corresponding to the Doppler frequency and different phase. The phase difference between the two output signals is indicative of the approach or recession of a target with respect to the radar system.

REFERENCES:
patent: 3139592 (1964-06-01), Sisson
patent: 3448822 (1969-06-01), La Lone et al.
patent: 3479615 (1969-11-01), Garver
patent: 3980974 (1976-09-01), Yamamoto et al.
patent: 4034313 (1977-07-01), Jones et al.
patent: 4084128 (1978-04-01), Ames et al.

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