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A New Magneto-Dielectric Material Loaded, Tunable UHF Antenna for Handheld Devices

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6 Author(s)
F. Ferrero ; Lab. of Electron. Antenna & Telecommun. (LEAT), Valbonne, France ; A. Chevalier ; J. M. Ribero ; R. Staraj
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In this letter, the impact of a magneto-dielectric resonator on a DVB-H antenna is investigated. A frequency reconfigurable antenna using a folded monopole antenna structure and varactor diodes is proposed. Two different designs are realized with and without the resonator. A measured instantaneous -6-dB bandwidth wider than 8 MHz is obtained continuously between 470 and 862 MHz for both prototypes. Design methodology is described. Measured return loss, gain, directivity, and radiation pattern are presented for different frequencies.

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IEEE Antennas and Wireless Propagation Letters  (Volume:10 )