Abstract | Dielectric resonator antenna (DRA) mounted on cylindrical
g
round plane is investigated for handheld RFID reader
applications at 5.8 GHz. The simplicity of the structure
makes it practical in terms of cost, space, and ease of
fabrication. The radiation characteristics of the antenna in
free space and in the presence of a proposed compact reader
device model and human hand are calculated. The antenna
is circularly polarized and exhibits peak gain of 7.62 dB at
5.8 GHz with high front to back ratio of 15.5 dB. Using the
same reader device model, a sequentially feeding 2×2 DRA
array mounted on the same cylindrical ground plane is used
for RFID reader antenna at 5.8 GHz. The array introduces
high gain of 9.36 dB at 5.8 GHz with high front to back
ratio of 10.48 dB. The 2×2 DRA array elements exhibit
circular polarization over a frequency band of 1.1 GHz. The
axial ratio is 1.1 dB at 5.8 GHz. The proposed reader model
is simple and has a small size compared with that in the
case of planar ground plane. The results are calculated using
the finite element method (FEM) and compared with that
calculated using the finite integral technique (FIT) |