Communications: directive radio wave systems and devices (e.g. – Determining direction – Scanning
Patent
1989-10-19
1991-09-24
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Determining direction
Scanning
G01S 1300
Patent
active
050517538
ABSTRACT:
An array antenna system having a predetermined electric current distribution on an antenna aperture to form a desired shape of antenna beam. Active antenna elements arranged on the aperture transmit a signal for electronically scanning a predetermined region to detect a target and receive a signal reflected by the target. Passive antenna elements are also arranged on the aperture. The antenna system further includes a direction finding section including reception antenna elements which receive an incident signal. The active, passive and reception antenna elements are positioned to allow a predetermine electric current distribution to be established on the antenna aperture.
REFERENCES:
patent: 3380053 (1968-04-01), Connolly
patent: 4160974 (1979-07-01), Stavis
patent: 4336540 (1982-06-01), Goodwin et al.
Numazaki et al., An Improved Thinning Method for Density Tapering of Planar Array Antennas, IEEE Transactions on Antennas and Propagation, vol. AP-35, No. 9, Sep. 1987.
Passive Direction Finding and Signal Location, Microwave Journal, Sep. 1982, pp. 59-76.
Find the Emitter Fast With Monopulse Methods, Microwaves, May 1978, pp. 42-53.
Haruyama Tetsuo
Shiramatsu Kuniaki
Udagawa Shigeo
Blum Theodore M.
Mitsubishi Denki & Kabushiki Kaisha
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