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Journal of Electrical and Computer Engineering
Volume 2017 (2017), Article ID 1936849, 5 pages
https://doi.org/10.1155/2017/1936849
Research Article

Compact Design of Circularly Polarized Antenna with Vertical Slotted Ground for RFID Reader Application

1College of Computer Science, Hefei Normal University, Hefei, China
2School of Electronic and Information Engineering, Jinling Institute of Technology, Nanjing, China
3College of Computer & Information, Anqing Normal University, Anqing, China

Correspondence should be addressed to Hesheng Cheng; moc.621@832gnehsehgnehc

Received 7 March 2017; Revised 17 August 2017; Accepted 6 September 2017; Published 3 December 2017

Academic Editor: Jit S. Mandeep

Copyright © 2017 Hesheng Cheng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel compact circular polarization (CP) microstrip antenna is proposed for UHF ultrahigh frequency (UHF) radio frequency identification (RFID) reader applications. The proposed antenna is composed of a corner truncated square-ring radiating patch on a substrate and a vertical slotted ground surrounding four sides of the antenna. A new feeding scheme is designed from flexible impedance matching techniques. The impedance bandwidths for  dB and 3 dB axial ratio (AR) bandwidth are 12.1% (794.5–896.5 MHz) and 2.5% (833.5–854.5 MHz), respectively.