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Miniaturized Triple-Band Antenna With a Defected Ground Plane for WLAN/WiMAX Applications

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4 Author(s)
Jing Pei ; Sch. of Electron. Inf. Eng., Tianjin Univ., Tianjin, China ; An-Guo Wang ; Shun Gao ; Wen Leng

A miniaturized multifrequency antenna is proposed. The proposed antenna can generate three separate impedance bandwidths to cover all the 2.4/5.2/5.8-GHz WLAN operating bands and the 2.5/3.5/5.5-GHz WiMAX bands. The proposed microstrip-fed antenna mainly consists of a circular ring, a Y-shape-like strip, and a defected ground plane. By adding a Y-shape-like strip in the circular ring, the antenna excites two resonant modes and is with miniaturization structure. Because of the introduction of the cambered ground plane with an isosceles triangle-defect, the third wide band with better impedance matching is obtained. A prototype is experimentally tested, and the measured results show good radiation patterns and enough gains across the operation bands.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:10 )

Date of Publication:

2011

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