Communications: directive radio wave systems and devices (e.g. – Determining direction – Monopulse
Patent
1985-10-22
1988-01-12
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Determining direction
Monopulse
G01S 1300
Patent
active
047194650
ABSTRACT:
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.
REFERENCES:
patent: 3883870 (1975-05-01), Kunz
patent: 4124849 (1978-11-01), Zahornosky et al.
patent: 4143372 (1979-03-01), Saluandon et al.
patent: 4210911 (1980-07-01), Jacomini
patent: 4568940 (1986-02-01), Diamond
Hayes D. E.
Kabushiki Kaisha Toshiba
Tarcza Thomas H.
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