Array built in test

Details Array built in test Array built in test

1990-08-22

1991-08-06

Hellner, Mark

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

Testing or calibrating of radar system

By monitoring

342165, 342372, H01Q 2122

Patent

active

050381466

ABSTRACT:
Built in test circuitry for an array transmitter. The circuitry includes a directional coupler with directivity equal to the mutual coupling between adjacent antenna elements. The direct input port of the coupler is connected to the antenna element and the direct output port of the coupler is connected to the circuitry generating the signal transmitted by the antenna element. The coupled port of the coupler feeds a detector which in turn provides an input to a control circuit. This circuit can be controlled to test, for each antenna element, the RF power driving each antenna element, the effective power radiated from each element, and the operation of the phase shifter coupled to each antenna element.

REFERENCES:
patent: 4434397 (1984-02-01), Nelson
patent: 4532518 (1985-07-01), Gaglione et al.
patent: 4710734 (1987-12-01), Sterns
patent: 4857935 (1989-08-01), Bates
patent: 4949090 (1990-08-01), Tamii et al.
patent: 4951060 (1990-08-01), Cohn

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