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A novel uniplanar wideband magneto-electric dipole antenna element

Published online by Cambridge University Press:  08 August 2017

Chen-Yang Shuai ,
Guang-Ming Wang  and
Ya-Wei Wang
Chen-Yang Shuai
Affiliation:
Air Force Engineering University, Xi'an, Shaanxi, China
Guang-Ming Wang*
Affiliation:
Air Force Engineering University, Xi'an, Shaanxi, China
Ya-Wei Wang
Affiliation:
Air Force Engineering University, Xi'an, Shaanxi, China
*
Corresponding author: G.-M. Wang Email: [email protected]
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Abstract

A novel uniplanar wideband magneto-electric dipole antenna element is proposed in this paper. The proposed antenna is composed of the conventional bow-tie radiation patch as an electric dipole, a semi-circular loop, which works as a magnetic dipole, a coplanar ground plane, two directors with different lengths for enhancing gain, and a microstrip-to-coplanar stripline transition balun. The designed antenna adopts a small-size coplanar ground plane to achieve a uniplanar structure. Consequently, this method reduces the space size immensely and makes the antenna suitable for the array application. In addition, a tapered slot structure is utilized to improve impedance matching. The prototype of the proposed antenna was fabricated and measured. The measured results keep in good accordance with the simulated ones. The simulated results show that the proposed antenna obtains a broad impedance bandwidth of 60.5% from 2.25 to 4.20 GHz (voltage standing wave ratio [VSWR] ≤ 2) which can be applied for wireless local area network (WLAN) (2.4–2.484 GHz), worldwide interoperability for microwave access (WiMAX) (2.5–2.69/3.4–3.69 GHz), and long term evolution (LTE) (2.5–2.69 GHz). Meanwhile, the stable gain, low cross-polarization, stable unidirectional radiation patterns, and low back lobe are obtained within the operating frequency band. The array composed of the proposed antenna elements is also investigated in this paper.

Keywords

UniplanarWidebandMagneto-electric dipoleUnidirectionalArray
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 10 , December 2017 , pp. 1983 - 1989
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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References

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