Title :
Dual-band ESPAR antenna for wireless LAN applications
Author :
Shibata, Osamu ; Furuhi, Tomoshige
Author_Institution :
Murata Manuf. Co. Ltd., Kyoto, Japan
Abstract :
A 2.4/5.2 GHz dual-band ESPAR (electronically steerable parasitic array radiator) antenna has been developed. The antenna consists of one RF excited center element and six parasitic ones for each frequency band. Each parasitic element is connected to a ground plane via variable reactance for controlling the beam direction. In order to avoid the beam fluctuations of the 5.2 GHz-band being affected by the 2.4 GHz beam, a low pass filter is added between parasitic element for 2.4 GHz-band and variable reactance. Six short posts are arranged symmetrically close to the center element to achieve a dual band resonance. This is the first report showing the successful dual-band operation of ESPAR antenna.
Keywords :
UHF antennas; antenna earths; antenna radiation patterns; beam steering; electric reactance; low-pass filters; microwave antenna arrays; multifrequency antennas; wireless LAN; 2.4 GHz; 5.2 GHz; RF excited center element; beam direction control; dual-band ESPAR antenna; electronically steerable parasitic array radiator; ground plane; low pass filter; parasitic element; short posts; variable reactance; wireless LAN; Adaptive arrays; Antenna arrays; Antenna radiation patterns; Dual band; Electromagnetic coupling; Fluctuations; Low pass filters; Manufacturing; Radio frequency; Wireless LAN;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552084
