Abstract
In this paper, a balanced antenna for mobile handset applications with enhanced bandwidth performance, that covers four bands (GSM1800, GSM1900, UMTS and 2.4-GHz WLAN), is investigated. The antenna is a slot planar dipole with folded structure and a dual-arm on each monopole. A wide bandwidth planar balun is employed to feed the wideband balanced antenna from an unbalanced source. A prototype of the proposed antenna is fabricated and tested. The performance of the antenna is verifled and characterized in terms of return loss, ra- diation patterns and power gain. The calculated and measured results show good agreement and also conflrm good wideband characteristics for the proposed antenna with multiband operation.
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