Identification label for objects for automatic vehicle control - is modify radar signal to allow identification of moving vehicle

摘要

Signal generating labelsor tags are used for control purposes. Typical applicators are in security systems in stores and road vehicle access control. The label has a pair of antenna, one of which has a diode, and are coupled together by an element. The antenna are tuned to two different frequency ranges, i.e. 9.5 GH2 and 1 or 2GHz. The lower frequency is changed on a yearly basis. The detention system consists of a radar speed measuring system and an additional transmitter. The signal interaction results ina pseudo Doppler signal being generated enabling the label to be detected. USE - Allows vehicle to be remotely identified using radar system.