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Broadband low-profile antennas for wireless applications

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5 Author(s)
R. L. Li ; Georgia Electron. Design Centre, Georgia Inst. of Technol., Sch. Of Electr. And Comput. Eng., GA ; B. Pan ; J. Papapolymerou ; J. Laskar
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Two novel broadband low-profile antennas are developed for the mobile terminals of wireless applications. The first one is a quasiplanar antenna which has a height of 0.06lambda0, where lambda0 is the free-space wavelength at the centre frequency. The second one is a planar antenna which has a height of 0.056lambda0. It is demonstrated that the quasiplanar antenna can achieve a bandwidth for VSWR<2 of more than 45%, while the planar antenna realises a bandwidth of more than 40%. More importantly, over these bandwidths the broadband low-profile antennas have a quite constant omnidirectional radiation pattern with a peak gain of around 1 dBi. The antennas are designed on a commonly used RT/Duroid substrate; hence it is easy to integrate with RF front-end circuits. The antenna structures are described and the simulation and experimental results are presented

Published in:

IET Microwaves, Antennas & Propagation  (Volume:1 ,  Issue: 2 )