Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Antenna control
Patent
1989-12-13
1991-02-26
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Antenna control
342 83, 342 17, 342 18, G01S 736, G01S 742
Patent
active
049965328
ABSTRACT:
A radar system having improved interference resistance. A transmitting section includes an oscillator capable of switching the oscillation frequency, and a transmitting antenna connected to said oscillator and capable of transmitting electric waves having specified transmitting frequencies transmitted in different directions in a specified order to enable a desired range to be scanned. The oscillator and the transmitting antenna are designed to operate so that every time one scanning is completed or every time the transmitting direction is changed during each scanning period, the transmitting frequency may be changed. The receiver can simultaneously form a plurality of beams in the scanning range, convert the received signals to digital signals, and output signals indicating the frequencies and arrival directions of the received signals. The operating mode of the transmitting section may be altered in accordance with the frequency and arrival direction of the received waves.
REFERENCES:
patent: 4151527 (1979-04-01), Masliah et al.
patent: 4358766 (1982-11-01), Mehron
patent: 4656479 (1987-04-01), Kirimoto et al.
patent: 4724438 (1988-02-01), Arnold et al.
Ruvin et al., "digital Multiple Beamforming Techniques for Radar", Eascon '78, IEEE, pp. 152-163.
Fujisaka Takahiko
Kirimoto Tetsuo
Ohashi Yoshimasa
Barron Jr. Gilberto
Mitsubishi Denki & Kabushiki Kaisha
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