Abstract
With the future long term evolution (LTE) auction for television white spaces at 600 MHz, there is a strong need for efficient handset antennas operating at very low frequencies. This communication shows a tunable antenna covering the LTE bands from 600 MHz to 2.6 GHz. The antenna uses state-of-the-art microelectromechanical system tunable capacitors in order to reconfigure its operating frequency. In this communication, the design mitigates the tuning loss with a tunable extended ground plane. The resulting dual-resonant antenna exhibits a peak total efficiency of −3.9 dB at 600 MHz.
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