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Journal of Electromagnetic Waves and Applications Volume 22, 2008 - Issue 14-15
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Articles

Modified Square UWB Monopole Antenna for Improved Impedance Bandwidth

S. N. Khan COMSATS Institute of Information Technology, Lahore, Pakistan; Higher Education Commission (HEC), Islamabad, Pakistan
,
J. Yao Centre for Optical and Electromagnetic Research, Department of Optical Engineering, Zhejiang University, Hangzhou 310058, China
,
Z. Shuai Centre for Optical and Electromagnetic Research, Department of Optical Engineering, Zhejiang University, Hangzhou 310058, China
&
S. He Centre for Optical and Electromagnetic Research, Department of Optical Engineering, Zhejiang University, Hangzhou 310058, China; Division of Electromagnetic Engineering, School of Electrical Engineering, Royal Institute of Technology, S-100 44 Stockholm, Sweden
Pages 1883-1888 | Published online: 03 Apr 2012
 
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Abstract

Square monopole is modified to improve the impedance bandwidth. The modified square monopole has a step-generated circular base. The measured return loss below −10 dB is from 2.42 GHz to over 20 GHz and good omnidirectional radiation pattern is also achieved.

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