Antenna which is electronically reconfigurable in transmission

Details Antenna which is electronically reconfigurable in transmission Antenna which is electronically reconfigurable in transmission

1989-03-20

1990-10-23

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

342373, G01S 703

Patent

active

049655876

ABSTRACT:
The present invention relates to an antenna which is electronically reconfigurable in transmission. The antenna comprises an array (11) of elementary sources, an energy-focusing reflector (10), with the array (11) being situated in the focal zone of the reflector, and control and feed electronics, the electronics comprising an amplifier stage (22) constituted by amplifiers (24) and including at least one generalized coupler disposed at the outputs of the amplifiers (24), and beam-forming circuits (20, 21) each corresponding to a transmitted beam, with the amplitude and relative phase of the signals leaving said circuits being controlled by respective adjustable phase shifters and adjustable attenuators. The invention is particularly applicable to space telecommunications.

REFERENCES:
patent: 3993999 (1976-11-01), Hemmi et al.
patent: 4477781 (1984-10-01), Reuss, Jr.
patent: 4799065 (1989-01-01), Thompson
patent: 4825172 (1989-03-01), Thompson
patent: 4827268 (1989-05-01), Rosen
patent: 4864311 (1989-09-01), Bennett et al.
RCA Review, vol. 46, No, 3, Sep. 3, 1985, pp. 375-392, Princeton, N.J., U.S.; S. H. Colodny et al., "Active Array Antenna Beam Shaping for Direct Broadcast Satellites and Other Applns", FIG. 1; pp. 376-378.
IEEE Introduct'l. Conf. on Communications 1985, Chicago, Ill., Jun. 23-26, 1985.

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