초록 ▼

A monopulse radar equipment is developed which comprises first and second radiators arranged in symmetrical positions with respect to the boresight axis to radiate radar pulses in a predetermined cycle and thus to produce first and second directional radiation patterns, a beam forming network for sy

A monopulse radar equipment is developed which comprises first and second radiators arranged in symmetrical positions with respect to the boresight axis to radiate radar pulses in a predetermined cycle and thus to produce first and second directional radiation patterns, a beam forming network for synthesizing in an in-phase and opposite-phase relation the first and second directional radiation patterns of the first and second radiations into sum and different patterns, and a multichannel receiver for forming from the sum and difference patterns an off-boresight signal representing a deviation of a target object from the boresight direction and a sidelobe suppressed signal resulting from suppressing a sidelobe response of the sum pattern. The first and second directional couplers are interposed on the sum and difference pattern signal transmission channels between the beam forming network and the multichannel receiver. The first and second calibration signals of the same amplitude and phase are injected onto the sum and difference pattern signal transmission channels through the first and second directional couplers. The calibration signal is detected at the output terminal of the multichannel receiver and the phase characteristics between the sum and difference pattern signal transmission channels are compensated for in accordance with a result of detection.

대표청구항 ▼

A monopulse radar equipment comprising: first and second radiators arranged in symmetrical positions with respect to a boresight axis for radiating radar pulses in a predetermined cycle and for producing first and second directional radiation patterns; beam forming means for synthesizing the first a

A monopulse radar equipment comprising: first and second radiators arranged in symmetrical positions with respect to a boresight axis for radiating radar pulses in a predetermined cycle and for producing first and second directional radiation patterns; beam forming means for synthesizing the first and second directional radiation patterns, in an in-phase and opposite-phase relation and for producing a sum radiation pattern signal and a difference radiation pattern signal; a multichannel receiver for generating, from the sum and difference pattern signals, an off-boresight signal representing a deviation of a target object from the boresight axis; first and second directional couplers arranged in sum and difference pattern signal transmission channels between the beam forming means and the multichannel receiver; calibration signal generating means connected to the first and second directional couplers for injecting first and second calibration signals into the sum and difference pattern signal transmission channels; and compensating means connected to an output of the multichannel receiver for detecting the calibration signal and for compensating for a phase characteristic and/or an amplitude characteristic of the sum and difference pattern signal transmission channels in accordance with a result of detection.