Original scientific paper
Circular Polarized Dielectric Resonator Antenna for Portable RFID Reader Using a Single Feed
Hend A. Malhat
; Faculty of Electronic Engineering, Minoufiya University, Egypt
Saber H. Zainud-Deen
; Faculty of Electronic Engineering, Minoufiya University, Egypt
Kamal H. Awadalla
; Faculty of Electronic Engineering, Minoufiya University, Egypt
Abstract
A new design of circular polarized elliptical
dielectric resonator antenna (DRA) with single feed for
handheld radio frequency identification (RFID) reader is
presented. The elliptical dielectric resonator antenna
with an aspect ratio of 1.5 is used. This design has
achieved 66.7 MHz impedance bandwidth (for S11 < ‐10
dB) by using material with dielectric constant material
(εr = 12) in conjunction with coaxial probe feed in free
space. The DRA models are simulated using two
different numerical techniques, the finite element
method and the finite integral technique. The numerical
results of the two different computational methods
approache are investigated and compared. The results
are in good agreement within the desired frequency
band, 5.65 GHz – 5.95 GHz. A model for a handheld
RFID reader device including the elliptical DRA in the
presence of human hand models is, also, investigated.
The return loss is <10 dB over the frequency range of
5.49‐ 6.967 GHz resulting in frequency bandwidth of
1.47 GHz. A high front to back ratio and gain of
5.726dBi are obtained.
Keywords
Dielectric Resonator Antenna; RFID; Portable RFID Reader
Hrčak ID:
71544
URI
Publication date:
15.6.2011.
Visits: 1.599 *