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A Metal-Frame Antenna for Mobile Applications

A metal-frame antenna is proposed for mobile applications. The antenna is designed by taking into consideration all the metallic components like front-and-back cameras, telephone receiver, and a steel sheet. The metal-frame and metal-shell of the handset coupled with a strip are used as parts of the antenna. And a tuner is adopted to adjust the resonation frequency of the proposed antenna. The simulated results show that the proposed antenna is able to cover the bandwidth of 0.82–0.96 GHz (GSM) and 1.71–2.96 GHz (DCS/PCS/UMTS/LTE) with acceptable radiation efficiency up to 40%.