Title :
Identity-transponder system using c.w. interrogation
Author_Institution :
University College London, Department of Electronic & Electrical Engineering, London, UK
Abstract :
A system is described which interrogates coded transponders with a continuous unmodulated microwave transmission at 10.7 GHz. The interrogator uses a cheap mass-produced microwave Doppler radar module, and the transponder consists of an ordinary detector diode plus a battery-powered modulator to generate the code. The miniature batteries used last about a year and 10 m range can be obtained.
Keywords :
modulators; radar transmitters; transponders; CW interrogation; identity transponder system; microwave Doppler radar module; unmodulated microwave transmission;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19750489
