Communications: directive radio wave systems and devices (e.g. – Determining direction – With frequency or phase steering
Patent
1992-10-05
1993-12-14
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Determining direction
With frequency or phase steering
342188, 342361, 342371, H01Q 322, G01S 1300
Patent
active
052707199
ABSTRACT:
A transmission/reception module suitable for use in electronically phase-controlled antennas for a synthetic aperture radar includes a circulator provided for each individual radiator element terminal to achieve vertical and horizontal polarization. A low-noise amplifier is connected to the circulator in the reception path. A high-power amplifier is connected to the circulator in the transmission path. The two separate polarization reception channels each include a low-noise amplifier. The two separate polarization transmission channels each include a high-power amplifier. The reception channels and transmission channels are respectively connected to a polarization change-over. Switching arms of the polarization change-over are then connected to either the reception contact or the transmission contact of the transmission/reception switch.
REFERENCES:
patent: 4084137 (1978-04-01), Welti
patent: 4408206 (1983-10-01), Fitch et al.
patent: 4951060 (1990-08-01), Cohn
Priolo et al., "Multifunction Transmit and Receive Modules for EW Arrays", Microwave Journal, Feb. 1991 , pp. 83-92.
P. Bradsell, "Phased Arrays in Radar", Electronics & Communication Engineering Journal, Apr. 1990, pp. 45-50.
Davis et al., "L-Band T/R Module for Airborne Phased Array", Microwave Journal, Feb. 1977, pp. 54-60.
Hellner Mark
Siemens Aktiengesellschaft
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