Dual-frequency antenna for HF/UHF handheld RFID reader

Author

Wang-Ik Son ; Kyoung-Sub Oh ; Wang-Sang Lee ; Hyun-Sung Tae ; Jong-Won Yu

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea

fYear

2011

fDate

24-25 Aug. 2011

Firstpage

1

Lastpage

2

Abstract

This paper presents a dual-frequency (HF and UHF) antenna for handheld radio frequency identification (RFID) reader to embrace the benefits offered by both the UHF and HF RFID systems. In the HF (13.56 MHz) band, a spiral-shaped loop antenna is used and placed at the outmost region of the available space. In the UHF (915 MHz) band, a quadrifilar spiral antenna (QSA) is used because it is electrically small and features a low frequency shift by platform size and is placed in the center of the HF antenna. Measurements revealed that the antenna provides a quality factor of 56.5 in the 13.56 MHz and a gain of 2.5 dBic in the 920 MHz band.

Keywords

HF antennas; UHF antennas; loop antennas; multifrequency antennas; radiofrequency identification; spiral antennas; RFID; dual-frequency HF antenna; dual-frequency UHF antenna; frequency 13.56 MHz; frequency 915 MHz; frequency 920 MHz; handheld radio frequency identification reader; quadrifilar spiral antenna; spiral-shaped loop antenna; Antenna measurements; Radiofrequency identification; Spirals; Supply chains; UHF antennas; UHF measurements; Dual-frequency RFID reader antenna; HF RFID reader antenna; UHF RFID reader antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Radio for Future Personal Terminals (IMWS-IRFPT), 2011 IEEE MTT-S International Microwave Workshop Series on

Conference_Location

Daejeon

Print_ISBN

978-1-4577-0961-6

Electronic_ISBN

978-1-4577-0963-0

Type

conf

DOI

10.1109/IMWS2.2011.6027174

Filename

6027174