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Planar compact dual-band monopole antenna with circular polarization for WLAN applications

Published online by Cambridge University Press:  02 October 2014

Jui-Han Lu  and
Hao-Shiang Huang
Jui-Han Lu*
Affiliation:
Department of Electronic Communication Engineering, National Kaohsiung Marine University, Kaohsiung, Taiwan 81157, Republic of China. Phone: +886-7-3617141#3310
Hao-Shiang Huang
Affiliation:
Department of Electronic Communication Engineering, National Kaohsiung Marine University, Kaohsiung, Taiwan 81157, Republic of China. Phone: +886-7-3617141#3310
*
Corresponding author: J.-H. Lu, Email: jhlu@webmail.nkmu.edu.tw
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Abstract

A planar circularly polarized (CP) monopole antenna (MA) with dual-band operation for the IEEE 802.11a/b/g wireless local area network (WLAN) is proposed. By introducing dual strip-sleeves shorted at the ground plane, the excitation of dual-resonant modes can resemble the 2.4/5.2 GHz bands required for WLAN operations. The obtained impedance bandwidths (RL ≧10 dB) across the operating bands approach 260/988 MHz and the 3 dB axial-ratio bandwidth of about 103/710 MHz for 2.4/5.2 GHz bands, respectively. The model proposed in this study reflects more advantages in physical implementation as its overall volume is only 40 × 40 × 0.8 mm3, 22% smaller than other conventional CP MAs. The measured peak gain and radiation efficiency are about 4.1/3.3 dBic and 94/84%, respectively, and demonstrate nearly bidirectional patterns in the XZ- and YZ-planes.

Keywords

Monopole antennaDual-bandCircular polarizationWLAN
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 1 , February 2016 , pp. 81 - 87
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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References

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