Method and apparatus for calibrating phased array receiving ante

Details Method and apparatus for calibrating phased array receiving ante Method and apparatus for calibrating phased array receiving ante

1992-07-15

1993-09-28

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

342377, 342174, H01Q 322

Patent

active

052489825

ABSTRACT:
Disclosed is a method and apparatus for calibrating phased array receiving antennas that includes circuitry for generating a pair of calibration signals separable one from the other. The signals are injected into the delay elements of the antenna from opposite ends of a complementary calibration cable. The delay produced in the calibration signals is individually measured, and the delays summed and averaged to produce a delay measurement independent of delays produced by the calibration cable and accordingly delay measurement variations caused by environmental effects on the calibration cable.

REFERENCES:
patent: 4994810 (1991-02-01), Sinsky
patent: 5027127 (1991-06-01), Shnitken et al.
patent: 5063127 (1991-11-01), Chapoton
patent: 5111208 (1992-05-01), Lopez
Steyskal et al., "Digital Beamforming for Radar Systems", Microwave Journal, Jan. 1989.
Herd "Experimental Results of a Self Calibrating Digital Beamforming Array IEEE", 1990.

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