Research/Patents/US 4893128
US 4893128

TROPOSCATTER DIVERSITY SIDELOBE JAMMING SUPPRESSOR

Assignee

Filed

Nov 29, 1979

Granted

Jan 9, 1990

Location

CABRIDGE MA US

Abstract

Sidelobe jamming in dual diversity troposcatter link receivers is effectively suppressed by providing an auxilliary low power antenna, the output of which is differenced from the high power main antenna signals prior to processing in the receivers's dual diversity demodulator. The auxilliary antenna power is substantially equal to the sidelobe power of the main antennas. The auxilliary antenna receives jamming power that is comparable to the jamming power received by the main antennas. However, it receives much lower desired signal power. Differencing of the signals therefore, cancels jamming power with minimal effect on the desired signals.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Apr 1, 1982

Rescinded

Jul 31, 1989

Duration

7 years, 4 months

Inventor

  • 1STEEN A. PARL

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records