Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1997-08-22
2000-02-01
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342368, 342372, H01Q 302, H01Q 312
Patent
active
060208503
ABSTRACT:
Disclosed is an optical control type phased array antenna apparatus having an array antenna of antenna elements. An optical signal processor optically processes input high-frequency signals, and outputs optically processed signals including signal components having phases corresponding to directions in which radio wave signals come and having frequencies equal to those of the input high-frequency signals. Then, each frequency converter mixes a received signal with the optically processed signal in correspondence with the antenna element, and outputs a frequency-converted signal having a frequency of a difference between a frequency of the received signal and a frequency of the optically processed signal. Further, a combiner combines the frequency-converted signals. When reference signals each having a frequency that differs from the frequency of the corresponding radio wave signal by an intermediate frequency are inputted to the optical signal processor as the input high-frequency signals, intermediate frequency signals having the intermediate frequencies and corresponding to the radio wave signals are outputted as received signals from the combiner.
REFERENCES:
patent: 3878520 (1975-04-01), Wright et al.
patent: 3890598 (1975-06-01), Hagen et al.
patent: 4965603 (1990-10-01), Hong et al.
patent: 5029306 (1991-07-01), Bull et al.
patent: 5202692 (1993-04-01), Huguenin et al.
patent: 5367305 (1994-11-01), Volker et al.
patent: 5374935 (1994-12-01), Forrest
patent: 5400038 (1995-03-01), Riza et al.
patent: 5512907 (1996-04-01), Riza
patent: 5818386 (1998-10-01), Belisle
Gerhard A. Koepf, "Optical Processor for Phased-Array Antenna Beam Formation," Optical Technology for Microwave Applications, SPIE vol. 477, pp. 75-81, 1984.
Takanori Oogoshi, "Lightwave Engineering," Corona Publishing Co., Ltd., Paragraph 4.4, pp. 55-58, Aug. 15, 1982 (partial English language translation attached thereto).
Imai Nobuaki
Inagaki Keizo
Ji Yu
Karasawa Yoshio
ATR Adaptive Communications Research Laboratories
Phan Dao L.
Tarcza Thomas H.
LandOfFree
Optical control type phased array antenna apparatus equipped wit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical control type phased array antenna apparatus equipped wit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical control type phased array antenna apparatus equipped wit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-941210