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Design of compact dual-frequency antenna with bandwidth enhancement

Published online by Cambridge University Press:  24 July 2015

Liping Han ,
Longfei Hao ,
Liyun Yan ,
Runbo Ma  and
Wenmei Zhang
Liping Han
Affiliation:
College of Physics and Electronics Engineering, Shanxi University, Shanxi 030006, China
Longfei Hao
Affiliation:
College of Physics and Electronics Engineering, Shanxi University, Shanxi 030006, China
Liyun Yan
Affiliation:
College of Physics and Electronics Engineering, Shanxi University, Shanxi 030006, China
Runbo Ma
Affiliation:
College of Physics and Electronics Engineering, Shanxi University, Shanxi 030006, China
Wenmei Zhang*
Affiliation:
College of Physics and Electronics Engineering, Shanxi University, Shanxi 030006, China
*
Corresponding author: W. Zhang Email: zhangwm@sxu.edu.cn
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Abstract

A compact dual-frequency antenna with enhanced bandwidth is proposed in this paper. Dual-frequency operation is realized by cutting a slot in the elliptical patch, and bandwidth enhancement is achieved by using a partial ground plane. Compared with the conventional half-wave antenna, the antenna has a compact size of 24 × 20 mm2, which equals to 0.38 λ1 × 0.31 λ1 (λ1, the guided wavelength at the first resonant frequency). The dual-frequency antenna with a partial rectangle ground and a partial arc-shaped ground is investigated for impedance matching. Simulated results indicate that the antenna with a partial arc-shaped ground can obtain a larger bandwidth for two bands than that with a partial rectangle ground. Experimental results show that the antenna with a partial arc-shaped ground can operate in 2.4 and 5 GHz bands, which covers the 2.4, 5.2 and 5.8 GHz for wireless local area network. The impedance bandwidths of two bands are 9.5 and 13.6%, respectively. Also, good radiation performances have been achieved at two bands.

Keywords

CompactDual-frequencyPartial groundBandwidth improvement
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 1 , February 2017 , pp. 213 - 218
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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