Design of a compact mobile phone antenna with octa-band reconfigurable characteristics

A novel frequency reconfigurable mobile phone antenna of 43mm×9mm×3mm in size is proposed. The proposed antenna consists of meander feeding strip, coupling strip and multichannel RF-Switch. To achieve the resonant modes of lower band among four different working states, the RF-Switch is used to change the inductance value and the effective electrical length of the feed line. The lower band bandwidth of the antenna is expanded obviously. The research results show that long term evolution(LTE) and wireless wide area network(WWAN) can be covered by the proposed antenna with the return loss better than 6dB. The proposed antenna was fabricated and measured, good performances of the radiation efficiency, antenna gain and radiation patterns are obtained. It has the good prospects for the applications.