Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By simulation
Patent
1990-06-04
1991-09-10
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By simulation
342172, G01S 740
Patent
active
050477820
ABSTRACT:
Both a system and a method for simulating targets for a radar system is disclosed herein which generally comprises a test target generator having an input slaved to the pulse transmit frequencies of the radar system for generating a target simulating signal, a horn antenna for emitting the target simulating signal back to the radar receiver, a laser-operated optical transmission link having a single mode fiber optic cable for transmitting the target simulating signal from the test target generator to the horn antenna via optical carrier, and an amplification and processing circuit system connected between the output of the optical transmission link and the input of the horn antenna for increasing the amplitude of the target simulating signal to a level that is detectable by the radar receiver, and for further processing the signal. The test target generator also generates control signals indicative of a desired amplitude of the resulting target simulating signal, and the system preferably includes a controller in the form of a microprocessor whose input receives the control signal generated by the target generator, and whose output is connected to the amplifier system of the amplification and processing circuit. A phase shift circuit may be included in the processing circuit for both compensating for phase distortions that result from the impedances inherent in the remote transmission of the target simulating signal, and for providing a further means for selectively modifying the signature characteristics of the target simulating signal.
REFERENCES:
patent: 3906500 (1975-09-01), Redman
patent: 3953850 (1976-04-01), Redman
patent: 4860016 (1989-08-01), Westphal et al.
patent: 4903029 (1990-02-01), Newberg et al.
patent: 4944679 (1990-07-01), Allen et al.
Grone Donald J.
Lew Stanley Y.
Sotomayor John B.
Westinghouse Electric Corp.
Williamson John K.
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