A Compact Broadband Circularly Polarized Slot Antenna for Universal UHF RFID Reader and GPS

Authors

  • Canjie Chen School of Information Science and Technology Southwest Jiaotong University, Chengdu, 610031, China
  • Quanyuan Feng School of Information Science and Technology Southwest Jiaotong University, Chengdu, 610031, China

Keywords:

Axial Ratio (AR), Coplanar Waveguide (CPW), Circularly Polarized (CP), Global Positioning System (GPS), RFID reader, Ultrahigh Frequency (UHF)

Abstract

A novel compact printed broadband circularly polarized slot antenna is proposed in this paper. The antenna consists of an inverted L-shaped coplanar waveguide feed structure and a square ground plate loaded with three rectangular slots. The antenna achieves good impedance matching and circular polarization characteristics by adjusting the size of the L-shaped band and the rectangular slot. The simulation results show that the antenna has a 10-dB impedance bandwidth of 1360 MHz (690-2050 MHz) and a 3 dB axial ratio (AR) bandwidth of 490 MHz (770-1260 MHz). Additionally, the maximum gain reached 4.02 dBi. The antenna proposed in this paper can be applied to UHF RFID and GPS frequency bands.

Author Biographies

Canjie Chen, School of Information Science and Technology Southwest Jiaotong University, Chengdu, 610031, China

Canjie Chen was born in Wuzhou, Guangxi, China, in 1995. He is currently working toward the Master's degree in Information and Communication Engineering at Southwest Jiaotong University, Chengdu, China. His main research content is antenna design and theory, Mainly in RFID antennas.

Quanyuan Feng, School of Information Science and Technology Southwest Jiaotong University, Chengdu, 610031, China

Quanyuan Feng (M’06–SM’08) received the M.S. degree in Microelectronics and Solid Electronics from the University of Electronic Science and Technology of China, Chengdu, China, in 1991, and the Ph.D. degree in EM Field and Microwave Technology from Southwest Jiaotong University, Chengdu, China, in 2000. He is the Head of Institute of Microelectronics, Southwest Jiaotong University, Chengdu, China. He has been honored as the “Excellent Expert” and the “Leader of Science and Technology” of Sichuan Province owing to his outstanding contribution. In recent 5 years, more than 500 papers have been published on IEEE Transactions on Antennas and Propagation, IEEE Transactions on Microwave Theory and Techniques, IEEE Antennas and Wireless Propagation Letters etc., among which more than 300 were registered by SCI and EI.
His research interests include integrated circuits design, RFID technology, embedded system, wireless communications, antennas and propagation, microwave & millimeter wave technology, smart information processing, electromagnetic compatibility and RF/ microwave devices & materials etc.

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Published

2021-07-16

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