Design of a Wideband Circularly Polarized RFID Reader Antenna

Author(s)R. H. Chihava, A. C. Polycarpou, M. Nestoros
SourceFERMAT, Volume 37, Communication 9,  Jan.-Feb., 2020


AbstractThe main objective of this paper is to design a circularly polarized patch antenna with a very large bandwidth covering the UHF (ultra-high frequency) RFID band of 860 MHz - 928 MHz. The objective is to obtain an axial ratio (AR) lower than 3 dB and a return loss (RL) lower than -10 dB for the entire band of interest. The patch antenna design must also possess attributes such as high gain, high efficiency, ease of fabrication, low-cost fabrication and small form factor. The design consists of two stacked patch antennas with truncated corners and a square slot in the center. A coaxial cable is connected directly to the main patch, which is positioned in between the ground plane and the parasitic patch on top. The main patch also has an open circuit stub attached to it to improve impedance matching. A laborious design procedure, along with numerous parametric studies, were
conducted using ANSYS HFSS in order to optimize the design. 

Index Terms: RFID UHF antenna design, circularly polarized antenna



View PDF

Design of a Wideband Circularly Polarized RFID Reader Antenna









© Copyright 2014 FERMAT | All Rights Reserved
"FERMAT is published under the auspices of the University of Central Florida"
ISSN 2470-4202