Method of determining excitation of individual elements of a pha

Details Method of determining excitation of individual elements of a pha Method of determining excitation of individual elements of a pha

1982-07-26

1984-06-05

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343372, H01Q 300

Patent

active

044531648

ABSTRACT:
A near-field data measurement technique which provides sufficient data to enable the resolution of array element characteristics which are localized within a circle having a radius less than 0.61.lambda. is disclosed. This allows phase correction of individual array elements having spacings substantially less than 0.61.lambda. during the alignment of a phase array in a near-field test system.

REFERENCES:
patent: 3378846 (1968-04-01), Lowenschuss
patent: 3732569 (1973-05-01), Collins
patent: 3879733 (1975-04-01), Hansen et al.
patent: 4201987 (1980-05-01), Tricoles et al.
patent: 4270129 (1981-05-01), Herper et al.
"Implementing a Near-Field Antenna Test Facility", by W. A. Harmening, Microwave Journal, Sep. 1979, pp. 44-55.
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"Precision in Large Mechanisms-The Near-Field-Antenna Test Scanner", by W. A. Harmening, RCA Engineer, Jan./Feb. 1981, pp. 46-51.
"Planar Near-Field Measurements on High Performance Array Antennas", by A. C. Newell, et al., 1974, National Bureau of Standards, Boulder, Colorado.
"Plane-Wave Scattering-Matrix Theory of Antennas and Antenna-Antenna Interactions", by D. M. Kerns, 1981, National Bureau of Standards, Boulder, Colorado.
"Antenna Analysis by Near-Field Measurements", by K. R. Grimm, Microwave Journal, Apr. 1976, pp. 43-52.
"A Method of Locating Defective Elements in Large Phased Arrays", by P. L. Ransom and R. Mittra, in Phased Array Antennas, Artech House, 1973, pp. 351-356.
"Phased Array Alignment with Planar Near-Field Scanning or Determining Element Excitation from Planar Near-Field Data", by W. T. Patton in Proceedings of the 1981 Antenna Applications Symposium, Sep. 23, 24, 25, 1981, University of Illinois.

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