Optically Modulated Scatterer Technique for Radiation Pattern Measurement of Small Antennas and RFID Tags

Author

Lao, Ray-Rong ; Shay, Wen-Tron ; Hsu, Jimmy C. ; Tarng, Jenn-Hwan

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu

Volume

8

fYear

2009

fDate

7/1/1905 12:00:00 AM

Firstpage

76

Lastpage

79

Abstract

The optically modulated scatterer (OMS) technique is developed for the electromagnetic field distribution measurement with minimum disturbance to the field under test. In this letter, we present a novel method to measure the radiation pattern of unwired small dipole-like antennas such as radio frequency identification (RFID) tag antennas by OMS technique. The radiation pattern could be measured by this technique without any metallic feeding wire that would disturb the field pattern. The variation of the radiation pattern caused by the materials attached to an RFID tag antenna could also be evaluated with this technique.

Keywords

antenna radiation patterns; optical modulation; radiofrequency identification; RFID tags; optically modulated scatterer technique; radiation pattern measurement; radio frequency identification; small antennas; tag antenna; Optically modulated scatterer (OMS); radiation pattern; radio frequency identification (RFID); tag antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2008.2012122

Filename

4738411