Electronic counter measures in radar

Details Electronic counter measures in radar Electronic counter measures in radar

1977-09-15

2000-09-05

Sotomayor, John B.

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

Radar ew

Eccm

342 17, 342159, 342188, G01S 736

Patent

active

061149837

ABSTRACT:
Apparatus and method for eliminating an interference signal from a desired signal where a difference of polarization exists or can be made to exist. The desired signal is received on a first antenna of appropriate polarization and the interference signal is received via another port of the same antenna or a second antenna polarized ninety degrees away from the first. The signal received via the other polarization is adjusted for amplitude and phase so that all interference will be cancelled when both signals are subtracted in a summing junction. In the case where the interference and desired signals do not have polarization differences, provision is made to change the polarization of the desired signal.

REFERENCES:
patent: 3044062 (1962-07-01), Katzin
patent: 3093824 (1963-06-01), Ammerman
patent: 3849781 (1974-11-01), Ort
patent: 3883872 (1975-05-01), Fletcher et al.
patent: 3963990 (1976-06-01), DiFonzo

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