Tri-band and quad-band dual L-slot coupled circularly polarized dielectric resonator antennas

摘要

In this paper, two Dielectric Resonator Antenna (DRA) models fed through a pair of diagonally coupled asymmetric L-slots are incorporated on the ground plane of size 44 X 44 mm~2 with a strip line feed underneath the substrate are presented. The proposed DRA-1 is a triband antenna, resonates at 5.2GHz, 6.7GHz and 9.85GHz with a gain of 5.6dBi, 5.66dBi and 9.8dBi respectively. The bandwidth offered at Circularly Polarized (CP) band by DRA-1 is 1.95 GHz (6-7.95 GHz). The proposed second model DRA-2 operates at 5 GHz, 6.4 GHz, 7.8 GHz and 10.3 GHz with a peak gain of 5.5dBi, 5dBi, 6.1dBi and 7.8dBi respectively. The quad-band DRA-2 offers two CP bands with bandwidths of 1.3GHz (7-8.3 GHz) and 1.2 GHz (9.8-11 GHz). The multiple operating bands of the proposed DRAs are appropriate for different wireless applications such as WLAN, C-Band and X-Band range of frequencies.