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Abstract—A small 3-Dimensional (3-D) multi-band antenna of “F” shape is proposed for portable phones ’ applications. The designed configuration of the proposed antenna is different from traditional Planar Inverted-F Antenna (PIFA) radiators. The proposed antenna has the good characteristics of wide band. The ratio of impedance bandwidth to the central frequencies 2.5 and 5.1GHz is 28.6 % and 9%, respectively. It can be applied to Bluetooth (BT) 2.4GHz and Unlicensed NII — 5GHz, UNII-1 5.1 ∼ 5.25GHz and UNII-2 5.25 ∼ 5.35GHz. The experimental results have fairly good agreement with the simulation data by High Frequency Structure Simulator (HFSS). 1.
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Sun et al. (2009) studied this question.
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