Extending the Interrogation Range of a Passive UHF RFID System With an External Continuous Wave Transmitter

Author

Park, Jun-Seok ; Jung, Jin-Woo ; Ahn, Si-Young ; Roh, Hyoung-Hwan ; Oh, Ha-Ryoung ; Seong, Yeung-Rak ; Lee, Yoon-Deock ; Choi, Kyoung

Author_Institution

Dept. of Electr. Eng., Kookmin Univ., Seoul, South Korea

Volume

59

Issue

8

fYear

2010

Firstpage

2191

Lastpage

2197

Abstract

This paper introduces an interrogation enhancer (IE) as an external system that boosts a reader continuous wave (CW) with its auxiliary CW. The boosted reader CW powers the backscatters from a passive ultrahigh frequency radio frequency identification (UHF RFID) tag to reach the reader in extended range. The system performance is verified according to the measured ranges in practical tests. The IE permits the reader to successfully interrogate the tag in tripled or doubled range (e.g., 80-290 and 182-370 cm). The measurement results imply that the IE can be used for readers that may not transmit enough CW due to the local regulation or its limited battery capacity.

Keywords

UHF devices; radio transmitters; radiofrequency identification; boosted reader; external continuous wave transmitter; interrogation enhancer; interrogation range; passive UHF RFID system; passive ultrahigh frequency radio frequency identification tag; reader continuous wave booster; Auxiliary power; continuous wave (CW); interrogation enhancer (IE); passive ultrahigh frequency radio frequency identification (UHF RFID) tag; reader CW;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2009.2032868

Filename

5337882