Communications: directive radio wave systems and devices (e.g. – Radar ew – Detection of surveilance
Patent
1998-09-28
2000-11-28
Gregory, Bernarr E.
Communications: directive radio wave systems and devices (e.g.,
Radar ew
Detection of surveilance
342175, 342195, 455205, 4552261, 4551611, G01S 740, H04B 1700
Patent
active
061541664
ABSTRACT:
In order to detect microwaves from radar type speed measurement devices and microwaves leaking out of reverse detectors without being detected by such reverse detectors, a microwave detector is provided with a super-heterodyne type reception circuit for cyclically performing reception operations to receive target microwave frequencies of prescribed microwave bands, the reception circuit including a first local oscillator which can carry out a fixed oscillation at a prescribed frequency or a sweep of a prescribed frequency range established slightly outside the frequency range of the local oscillator of a reverse detector, and a plurality of second local oscillators having different oscillation frequencies, whereby the reception circuit is able to receive microwaves in the target bands and microwaves leaking out of the local oscillator of a reverse detector.
REFERENCES:
patent: 5268689 (1993-12-01), Ono et al.
patent: 5389930 (1995-02-01), Ono
patent: 5461383 (1995-10-01), Ono et al.
patent: 5852417 (1998-12-01), Valentine et al.
"Road Patrol XK Wireless Hidden/Remote Radar Detector Features"; Faxback Doc. # 32788; on the Internet at support.tandy.com/support.sub.-- auto/32788.html, Apr. 30, 1996.
"Traffic Enforcement in Victoria" on the Interenet at www.netspace.net.au/.about.smack/traffic/rdd.html, no date
Imura Mitsuhiro
Ito Akira
Kajita Yuichi
Koike Shinji
Ono Hisao
Gregory Bernarr E.
Yupiteru Industries Co., Ltd.
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