Compact broadband circularly polarised slot antenna for universal UHF RFID readers

Author

Bo Xu ; Shuai Zhang ; Yusha Liu ; Jun Hu ; Sailing He

Author_Institution

Centre for Opt. & Electromagn. Res., Zhejiang Univ., Hangzhou, China

Volume

51

Issue

11

fYear

2015

fDate

5 28 2015

Firstpage

808

Lastpage

809

Abstract

A compact broadband circularly polarised slot antenna is designed for universal ultra-high-frequency (UHF) radio-frequency identification (RFID) readers. The antenna consists of an L-shaped metal strip and a square-slot-loaded ground plane with four tuning stubs. The total size is 100 × 100 × 1.6 mm³. The measured -10 dB impedance bandwidth is 40.7% (772-1166 MHz) and the measured 3 dB axial ratio (AR) bandwidth is 13.9% (840-965 MHz). Both the impedance and the AR bandwidth cover the worldwide UHF RFID band.

Keywords

UHF antennas; broadband antennas; electromagnetic wave polarisation; radiofrequency identification; slot antennas; AR bandwidth; CP slot antenna; L-shaped metal strip; UHF RFID band; axial ratio bandwidth; compact broadband circularly polarised slot antenna; frequency 772 MHz to 1166 MHz; impedance bandwidth; radio-frequency identification; square-slot-loaded ground plane; tuning stubs; universal UHF RFID readers; universal ultra-high-frequency;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2015.0593

Filename

7110781