Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!purdue!haven!mimsy!fe2o3!michael From: michael@fe2o3.UUCP (Michael Katzmann) Newsgroups: sci.electronics Subject: Police Radar Counter-counter measures Message-ID: <293@fe2o3.UUCP> Date: 29 Jan 90 17:20:26 GMT Organization: Rusty's BSD machine at home Lines: 29 This may be of interest: From the EE times Jan 22 1990. Heterodyne sensors 'sniff' radar detectors __________________________________________ Washington -- Canada is beginning to use a heterodyne-sensing system to sniff out the possession and operation of police radar detectors, which are illegal in some provinces. The heterodyne-sensing system detects the high-frequency emissions produced by the lion's share of commercial radar detectors. A low-power microwave Gunn diode oscillator in the antenna cavity produces just enough microwave radiation (at 10.25 GHz and/or 26 GHz) to be sensed by a police cruiser. --------------------------------------------------------------------- email to UUCP: uunet!mimsy!{arinc,fe203}!vk2bea!michael _ _ _ _ Amateur | VK2BEA (Australia) ' ) ) ) / // Radio | G4NYV (United Kingdom) / / / o _. /_ __. _ // Stations| NV3Z (United States) / ' (_<_(__/ /_(_/|_