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Dielectric Field Enhancer for Reconfiguring the Beam Pattern and Gain of an Antenna

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4 Author(s)
Hon, P.W.C. ; Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA ; Ayazi, A. ; Jalali, B. ; Itoh, T.

We demonstrate the use of a dielectric rod, herein called a dielectric field enhancer (DFE), to reconfigure the radiation pattern and gain of an omni-directional antenna. To assess the DFE capability, we demonstrate an increase in gain of a preexisting antenna by near-field coupling with the DFE. The resulting field pattern is observed to be a hybrid of the DFE's directive beam pattern and that of the preexisting antenna. Measurements of a prototype DFE show a gain increase of at least 7.7 dB after the inclusion of the DFE, which compare well with simulations and therefore verify the capability of the DFE.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:60 ,  Issue: 9 )