Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1981-12-21
1985-12-10
Cangialosi, Salvatore
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 14, G01S 728
Patent
active
045583226
ABSTRACT:
A radar system operating by means of frequency-modulated pulsed waves comprises an aerial system for directing such waves to at least one target located at a distance D and for receiving the waves reflected from said target, a mixer circuit having a first input for receiving a local signal, a second input for receiving the reflected signal received by the aerial system, and an output for producing information about the distance D, a frequency-modulated (FM) wave generator, a change-over device cooperating with a control circuit for temporarily connecting the FM wave aerial system to the generator, while the first input of the mixer circuit receives a signal derived from the output signal of the FM wave generator by means of a coupler. The control circuit comprises means for connecting the aerial system to the output of the FM wave generator during one of equal fixed time durations selected in a pseudo-random manner within a time interval of a fixed duration.
REFERENCES:
patent: 3727222 (1973-04-01), Hollis
patent: 4142189 (1979-02-01), Gleason
patent: 4219817 (1980-08-01), Moore et al.
Briody Thomas A.
Cangialosi Salvatore
Eason Leroy
Kaiser K. R.
Streeter William J.
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