Perfectioning in reply type radar systems, in particular the SSR

Communications: directive radio wave systems and devices (e.g. – Air traffic control – Secondary surveilance radar

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342 37, G01S 1376

Patent

active

046564772

ABSTRACT:
The invention regards a perfectioning in reply type radar systems, in particular SSR (Secondary Surveillance Radar) or IFF (Identification Friend or Foe). The invention has as its aim that of eliminating or reducing undesired replies due to reflections from fixed obstacles or from structural peculiarities in the main radar system (i.e. radome) and other similar effects. The suppression of undesired replies is attained by varying azimuthally the emission power of the radio-frequency impulses according to a memorized law.

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patent: 3735408 (1973-05-01), Litchford
patent: 3956747 (1976-05-01), Leypold et al.
patent: 4060805 (1977-11-01), McConcas
patent: 4099180 (1978-07-01), Kupersmith et al.
patent: 4316190 (1982-02-01), Cole
patent: 4408205 (1983-10-01), Hockham

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