Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1993-09-29
1995-03-21
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342354, H01Q 100, H04B 7185
Patent
active
054000360
ABSTRACT:
An energy transmission arrangement emits a microwave energy signal to a target location on the basis of a pilot signal received from the target location. The arrangement includes a plurality of pilot antennas for receiving the pilot signal and a plurality of antenna elements for transmission of the energy signal. The pilot signal as received at a first pilot antenna is multiplied at a phase conjugation circuit and divided into a plurality of transmission signals corresponding to the plurality of antenna elements. A target direction is calculated based on a phase difference of the pilot signal as received at each of the other pilot antennas and a phase adjustment circuit is provided for adjusting the phases of each of the transmission signals on the basis of the calculated target direction. Electrical energy is then supplied from energy collecting means to a plurality of amplifiers and amplified respectively, on the basis of a corresponding one of the transmission signals, to be supplied to respective antenna elements to be emitted as the microwave energy signal. According to this arrangment, the phase conjugation circuit is active to receive the pilot signal as received at the first pilot antenna as well as the pilot signal as received at a predetermined reference point in the path of the pilot signal for calculating a difference signal for effecting phase correction of the microwave energy signal.
REFERENCES:
patent: 3611381 (1971-10-01), Preikschat et al.
patent: 4148031 (1979-04-01), Tausworthe et al.
Asahi Newspaper, morning edition 13, Jul. 4, 1992, p. 15.
Fujiwara Teruo
Kaya Nobuyuki
Kochiyama Jiro
Yashiro Hiroyuki
Yasui Hidemi
Issing Gregory C.
Kaya Nobuyuki
Nissan Motor Co,. Ltd.
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