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Low-cost and compact 3D circularly polarized Microstrip antenna with high efficiency and wide beamwidth

Published online by Cambridge University Press:  10 February 2017

Xi Chen ,
Zhen Wei ,
Dan Wu ,
Long Yang  and
Guang Fu
Xi Chen*
Affiliation:
National Key Laboratory of Antennas and Microwaves Technology, Xidian University, Xi'an Shannxi 710071, China. Phone: +86 13572915354 Collaborative Innovation Centre of Information Sensing and Understanding, Xidian University, Xi'an Shannxi 710071, China
Zhen Wei
Affiliation:
China Academy of Space Technology (Xi'an), Xi'an Shannxi 710071, China
Dan Wu
Affiliation:
National Key Laboratory of Antennas and Microwaves Technology, Xidian University, Xi'an Shannxi 710071, China. Phone: +86 13572915354
Long Yang
Affiliation:
National Key Laboratory of Antennas and Microwaves Technology, Xidian University, Xi'an Shannxi 710071, China. Phone: +86 13572915354
Guang Fu
Affiliation:
National Key Laboratory of Antennas and Microwaves Technology, Xidian University, Xi'an Shannxi 710071, China. Phone: +86 13572915354 Collaborative Innovation Centre of Information Sensing and Understanding, Xidian University, Xi'an Shannxi 710071, China
*
Corresponding author: X. Chen Email: xchen@mail.xidian.edu.cn
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Abstract

A compact three-dimensional (3D) circularly polarized (CP) microstrip antenna is presented in this paper. The antenna adopts three low-cost printed circuit boards to form an integrated and closed 3D structure, and the radiation patch and the feed patches are etched on the surface of that. A crossed slot is cut on the radiation patch to miniaturize the antenna, and triangular feed patches are introduced to increase the bandwidths. In addition, because of the utilization of a low-loss series feed line, the antenna has a high efficiency of more than 95%. A prototype of the antenna is measured to validate the method. The dimensions of the antenna is 0.064λ × 0.36λ (λ is the wavelength in free space at 1.2 GHz). The results indicate that the impedance bandwidth for voltage standing wave ratio ≤ 2 reaches 23%, and the bandwidth for axial ratio (AR) ≤ 3 dB reaches 10.1%. In the overlap band, the gains are > 4.5dBic. Additionally, the 3 dB beamwidth is more than 114°, and the beamwidth for AR ≤ 3 dB is more than 131° at 1.2 GHz.

Keywords

Microstrip antennaCircularly polarizedLow-costHigh-efficiencyWide beamwidth
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Special Issue 7: EuCAP 2016 special issue , September 2017 , pp. 1533 - 1540
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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References

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