Sidelobe discriminator

Details Sidelobe discriminator Sidelobe discriminator

1979-09-12

1981-02-10

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343754, H04B 700

Patent

active

042505062

ABSTRACT:
A system for discriminating between signals arriving on the mainbeam of a collecting antenna and signals arriving on the sidelobes of the antenna is disclosed. The system includes a variable scatterer coupled to a collecting antenna for variably scattering the sidelobes of the antenna; a signal driver for providing a modulation signal having a predetermined modulation pattern, wherein the signal driver is coupled to the variable scatterer for variably scattering the sidelobes in response to the modulation signal to thereby cause signals arriving on the sidelobes to have the predetermined modulation pattern; a receiver coupled to the antenna for providing received signals in response to signals arriving on the mainbeam and signals arriving on the sidelobes of the antenna; and a detector coupled to the receiver and the signal driver, wherein the detector is responsive to the modulation signal for detecting the received signals having the predetermined modulation pattern, to thereby discriminate the detected signals as being received from signals arriving on the sidelobes and for providing an identification signal to indicate whether the received signal is coincident with signals arriving on the sidelobes of the collecting antenna. A corresponding system for discriminating between signals transmitted on the mainbeam and sidelobes of a transmitting antenna also is disclosed.

REFERENCES:
patent: 3276023 (1966-09-01), Dorne et al.
patent: 3453629 (1969-07-01), Stahler et al.
patent: 3708796 (1973-01-01), Gilbert

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