Three dimensional structural parameter analysis on a balanced-fed dual-band built-in antenna for wideband wireless LAN systems

Abstract

This paper describes the basic design, the optimization, and the overall performance of the balanced-fed dual-band built-in antenna. The four major key structural parameters of this antenna including the additional parameter h3 were optimized for the dual-band operation in Japan using the efficient parallel Method of Moment based on the 16 parallel PC cluster system. The bandwidth of 340 MHz for 2.4 GHz band and that of 480 MHz for 5 GHz band have been obtained after the structural parameter optimization. Also, the RF current on the metallic plate was evaluated in order to confirm the validity of the proposed antenna with balanced-fed. Finally, the optimized antenna configuration was evaluated experimentally. The measurement results demonstrate the bandwidths of 246 MHz for 2.4 GHz band and 325 MHz for 5 GHz band, which are sufficiently wide for the assigned frequency bands for the 2.4 GHz WLAN system and the 5 GHz indoor W LAN system in Japan.