Imaging RFID system at 24 GHz for object localization

Author

Kaleja, M.M. ; Herb, A.J. ; Rasshofer, R.H. ; Friedsam, G. ; Biebl, E.M.

Author_Institution

Inst. fur Hochfrequenztech., Tech. Univ. Munchen, Germany

Volume

4

fYear

1999

fDate

13-19 June 1999

Firstpage

1497

Abstract

A new RFID system for the ISM band at 24 GHz employing quasi-optical beam forming is presented. Active integrated antennas are used as transmitters resulting in exceptionally small size of the ID-tags. Identification codes are transmitted via a spread-spectrum modulated subcarrier that allows for very simple free running microwave oscillators as well as simple but highly selective receiver concepts. A dielectric lens and a 5/spl times/5 rectenna array comprise an imaging receiver that not only identifies but also localizes the tags with an angular resolution better than 3/spl deg/ at a distance up to 14 meters.

Keywords

identification technology; microwave imaging; object detection; 14 m; 24 GHz; ID tag; RFID system; active integrated antenna transmitter; dielectric lens; identification code; imaging receiver; microwave oscillator; object localization; quasi-optical beam forming; radiofrequency identification system; rectenna; spread spectrum subcarrier modulation; Dielectrics; High-resolution imaging; Lenses; Microwave oscillators; Modulation coding; Radiofrequency identification; Rectennas; Spread spectrum communication; Transmitters; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1999 IEEE MTT-S International

Conference_Location

Anaheim, CA, USA

Print_ISBN

0-7803-5135-5

Type

conf

DOI

10.1109/MWSYM.1999.780237

Filename

780237