Title :
An aperture coupled patch antenna system with MEMS-based reconfigurable polarization
Author :
Weily, Andrew R. ; Guo, Y. Jay
Author_Institution :
CSIRO ICT Centre, Epping
Abstract :
An aperture coupled patch antenna suitable for IEEE 802.11b/g WLAN applications is described. The antenna system enables the polarization of the device to be dynamically reconfigured, where the reconfiguration is actuated by an RF microelectromechanical system (MEMS) single-pole double-throw (SPDT) switch. An equivalent circuit model of the RF MEMS switch is used in the electromagnetic simulations of the antenna. This enables an accurate analysis of the antenna cross-polarization, which is highly dependent on the switch isolation. Theoretical results are given for the return loss, radiation patterns and gain of the antenna in both vertical and horizontal polarization states.
Keywords :
antenna radiation patterns; aperture-coupled antennas; electromagnetic wave polarisation; equivalent circuits; microstrip antennas; microswitches; wireless LAN; IEEE 802.11b; IEEE 802.11g; MEMS-based reconfigurable polarization; RF microelectromechanical system switch; SPDT switch; WLAN application; antenna cross-polarization; aperture coupled patch antenna system; electromagnetic simulation; equivalent circuit model; horizontal polarization; radiation pattern; single-pole double-throw switch; vertical polarization; wireless local area network; Apertures; Coupling circuits; Electromagnetic modeling; Electromagnetic wave polarization; Equivalent circuits; Micromechanical devices; Patch antennas; Radiofrequency microelectromechanical systems; Switches; Wireless LAN;
Conference_Titel :
Communications and Information Technologies, 2007. ISCIT '07. International Symposium on
Conference_Location :
Sydney,. NSW
Print_ISBN :
978-1-4244-0976-1
Electronic_ISBN :
978-1-4244-0977-8
DOI :
10.1109/ISCIT.2007.4392039
