volume | PIER Journals

2014-07-30

A Planar Monopole UWB Antenna with Improved Lower End Bandwidth Using an L-Shaped Stub Extended on the Ground Plane

Sani Mubarak Ellis,

Dr. Sani Mubarak Ellis

Electrical and Electronic Engineering

Kwame Nkrumah University of Science and Technology

Ghana

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Zhiqin Zhao,

Professor Zhiqin Zhao

School of Electronic Engineering

University of Electronic Science and Technology of China

China

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Jiangniu Wu,

Dr. Jiangniu Wu

School of Electronic Engineering

University of Electronic Science and Technology of China (UESTC)

China

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Kun Ma,

Dr. Kun Ma

School of Electronic Engineering

University of Electronic Science and Technology of China

China

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Zai-Ping Nie,

Professor Zai-Ping Nie

School of Electric Engineering

University of Electric Science and Technology of China

China

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Qing Huo Liu

Prof. Qing Huo Liu

Department of Electrical and Computer Engineering

Duke University

USA

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Progress In Electromagnetics Research C, Vol. 52, 109-114, 2014

doi:10.2528/PIERC14052001

Abstract

In this work, a planar monopole ultra-wideband (UWB) antenna with an L-shaped stub on the ground plane is proposed. The novel extended L-stub in conjunction with the UWB radiator achieves an ultra wideband impedance matching with a compact size. The proposed antenna is fabricated and measured showing an ultra wide operating frequency range from 2.3 to over 14 GHz (VSWR < 2) with a unidirectional gain from 3-6.5 dBi and efficiency from 70-85% within the UWB band from 3.1-10.6 GHz. The proposed antenna provides a new way to improve ultra wideband impedance matching other than the frequently used tapered microstrip feed line. It also provides a way to improve the lower frequency bandwidth of the antenna without increasing the antenna's physical size, which is the most common method to use.

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Sani Mubarak Ellis, Zhiqin Zhao, Jiangniu Wu, Kun Ma, Zai-Ping Nie, and Qing Huo Liu, "A Planar Monopole UWB Antenna with Improved Lower End Bandwidth Using an L-Shaped Stub Extended on the Ground Plane," Progress In Electromagnetics Research C, Vol. 52, 109-114, 2014.
doi:10.2528/PIERC14052001

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