Method and device for the on-line testing of a multiple-source a

Details Method and device for the on-line testing of a multiple-source a Method and device for the on-line testing of a multiple-source a

1992-03-23

1993-03-30

Issing, Gregory C.

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

Directive

Including antenna pattern plotting

343703, H01Q 300, G01R 2910

Patent

active

051988216

ABSTRACT:
Disclosed is a method and a device for the on-line testing of an antenna formed by a plurality of radiating sources. In an application for example to a secondary radar antenna, it is proposed to memorize the patterns (.SIGMA., .DELTA. and .OMEGA.) of the antenna when all the radiating sources work properly and, when each of the source is malfunctioning in turn, to meaasure the radiation patterns of the antenna during its operation in IFF mode and then to compute the coefficients of correlation of these patterns with all the corresponding memorized radiation patterns. The value of the coefficients obtained enables the precise determining and localizing of the malfunction. It is furthermore proposed to use a ground beacon responding to all the interrogations on several antenna rotations.

REFERENCES:
patent: 4517570 (1985-05-01), Gray, Jr.
patent: 4639732 (1987-01-01), Acoraci et al.
patent: 4926186 (1990-05-01), Kelly et al.
Saucier et al., "Direction Finding Using Correlation Techniques", Sanders Associates, Inc. p. 1-7.
IEEE Transactions on Antennas and Propagation, vol. AP-33, No. 12, Dec. 1985, New York, USA, pp. 1313-1327, J. Ronen, et al., "Monitoring Techiques for Phased-Array Antennas".
IEEE Transactions on Antennas and Propagation, vol. 36, No. 6, Jun. 1988, New York, USA, pp. 884-889.
E. M. Ferren, et al., "Near-Field Probe used as a Diagnostic Tool to Locate Defective Elements . . . ".
Patent Abstracts of Japan, vol. 6, No. 198 ( -147)(1076), Oct. 7, 1982, & JP-A-57 108 772, Jul. 6, 1982.

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