Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Patent
1988-04-08
1995-05-02
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
342372, G01S 740
Patent
active
054124140
ABSTRACT:
The invention relates to a self monitoring/calibrating phased array radar in which the operating path for transmission and the operating path for reception may be monitored/calibrated by the addition of a corporate calibration network coupled at the plural end to the antenna elements and at the singular end to the exciter/receiver, and switching means to selectively route the monitoring/calibrating signal derived from the exciter in a transmit path to calibration path sequence or in a calibration path to receive path sequence.
In one embodiment of the invention, a phase shifter common to transmit and receive paths is adjustable in increments under active logical control for calibration, while power and gain performance is monitored but not actively controlled. A novel T/R sub-assembly houses the operating electronics for four antenna elements in the form of four T/R modules with a one to four divider network in the transmit/receive path and in the calibration path. The four antenna elements are an integral part of the T/R sub-assembly.
REFERENCES:
patent: 4823136 (1989-04-01), Nathanson et al.
patent: 4864315 (1989-09-01), Mohuchy
patent: 4884078 (1989-11-01), Fishkin et al.
patent: 4924234 (1990-05-01), Thompson
patent: 4952940 (1990-08-01), Kuepfer
patent: 5027127 (1991-06-01), Shnitkin et al.
patent: 5262787 (1993-11-01), Wilson et al.
Ast Harry C.
Berical Albert H.
Carnahan Blake A.
Krueger, Jr. James W.
Miller Donald P.
Checkovich Paul
Martin Marietta Corporation
Sotomayor John B.
Young Stephen A.
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