%0 Journal Article
%T A Dual-Mode Aperature-Coupled Stack Antenna for WLAN Dual-Band and Circular Polarization Applications
%A Ji-Chyun Liu
%A Bing-Hao Zeng
%A Chin-Yen Liu
%A Hui-Chi Wu
%A Chung-Chi Chang
%J PIER    C
%D 2010
%I EMW Publishing
%R 10.2528/PIERC10100902
%X A compact stack antenna consisting of square loop resonators, aperture couples, feed line and the perturbation for dual-band and circular polarization (CP) applications is proposed in this paper. This perturbation applies both dual-mode and orthogonal mode effects existing in the square loop resonator to present wide-band and CP characteristics simultaneously. The stack antenna presents the desired bands of 2.46 GHz with bandwidth (BW) = 160 MHz (6.58%) and 5.28 GHz with BW = 450 MHz (8.52%). The circular polarizations for dual-band are demonstrated with axial ratio (AR) spectrum and orthogonal modes. The proposed antenna is successfully simulated and measured with frequency responses, radiation patterns and current distributions.
%U http://www.jpier.org/pierc/pier.php?paper=10100902