Protection system for electronic equipment

Details Protection system for electronic equipment Protection system for electronic equipment

1991-12-27

1993-08-17

Tubbesing, T. H.

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

Radar ew

342 16, G01S 736

Patent

active

052373282

ABSTRACT:
This invention concerns a system to protect active or passive electronic equipment from radar detection. In other words equipment which transmits or receives microwave radiation, for example a radar or telecommunications transmitter or receiver.
For this purpose, the transmitting surface of the equipment is covered by a device which can be controlled to apply a phase shift of approximately .pi./2 to the incident wave; this enables a microwave incident on the equipment to be modulated in phase. The frequency spectrum of the wave reflected by the equipment is modified and spread thus making it more difficult to detect the equipment. To avoid any perturbation of the operation of the equipment, an inverse modulation is applied to signals transmitted and/or received by the equipment itself.

REFERENCES:
patent: 3708796 (1973-01-01), Gilbert
patent: 4212014 (1980-07-01), Chekroun
patent: 4320404 (1982-03-01), Chekroun
patent: 4344077 (1982-08-01), Chekroun et al.
patent: 4447815 (1984-05-01), Chekroun et al.
patent: 5001495 (1991-03-01), Chekroun

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