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Unidirectional Antenna With Loaded Dielectric Substrate

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2 Author(s)
Lam Siu ; City Univ. of Hong Kong, Hong Kong ; Luk, Kwai-Man

A unidirectional antenna with loaded dielectric substrate composed of two shorted-circuited rectangular patches and a printed Gamma-shaped probe feed operated at 2.5 GHz is presented. The antenna is fully filled with dielectric substrate isinr = 2.65. The height of the antenna is only 18 mm. A wide impedance bandwidth of 45.3% (SWR les 2) is achieved. The average gain is about 6.7 dBi. The antenna performance can be improved by introducing of a metallic wall. The backlobe is reduced from -11.1 to -20.1 dB at the lower frequency.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:7 )