Title :
A microwave non-contact identification transponder using subharmonic interrogation
Author :
Pobanz, C.W. ; Itoh, T.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
A credit-card sized microwave transponder is presented for "wireless key" and surveillance applications. Based on a subharmonically pumped quasi-optical mixer, the transponder is activated by a C-band interrogation beam to upconvert and radiate a digitally modulated identification tone at X-band frequencies non-harmonically related to the interrogation signal.<>
Keywords :
biometrics (access control); microwave detectors; mixers (circuits); transponders; C-band interrogation beam; X-band frequencies; credit-card sized microwave transponder; digitally modulated identification tone; microwave noncontact identification transponder; subharmonic interrogation; subharmonically pumped quasi-optical mixer; surveillance applications; wireless key applications; Digital modulation; Frequency; Laser excitation; Optical modulation; Signal processing; Surveillance; Transponders;
Conference_Titel :
Microwave Symposium Digest, 1994., IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-1778-5
DOI :
10.1109/MWSYM.1994.335246
