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Plasmonics

, Volume 13, Issue 6, pp 2141–2150 | Cite as

A Wideband Printed Quadrifilar Helix Antenna under Frequency-Independent Dual Resonances

  • Meijun Qu
  • Li Deng
  • Mingxing Li
  • Huaqiang Gao
  • Shufang Li
Article
  • 82 Downloads

Abstract

A novel frequency-independent printed quadrifilar helix antenna with wideband performance is presented in this paper. The proposed antenna utilizes four simple gradient microstrip lines as radiators, which are wrapped around a thin cylindrical dielectric substrate. Each microstrip line has etched two slots. The introduction of the slots results in a reduced frequency interval between two resonances, making the proposed antenna achieve a wideband characteristic. In addition, the input impedance of the proposed antenna is extracted for parametric analysis. The change rule of the real and imaginary parts of the input impedance indicates that the position of the slot at below (top) could control the lower (upper) resonance point independently. A prototype is simulated, fabricated, and measured for demonstration. The measured impedance bandwidth of the proposed antenna is 42.6% from 1.09 to 1.68 GHz. Moreover, a feeding network adopting a chip balun and two chip hybrid couplers is designed to measure the radiation pattern and axial ratio of the proposed antenna. Finally, the wideband, frequency-independent, wide half-power beamwidth, and excellent circularly-polarized characteristics make the proposed antenna become a competitive candidate in the satellite communication and navigation and positioning systems.

Keywords

Circularly polarized Frequency-independent Quadrifilar helix antenna Wideband Slot 

Notes

Funding Information

This work was supported by National Natural Science Foundation of China (No. 61427801 and 61601040) and BUPT Excellent Ph.D. Students Foundation (CX2017208).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Information and Communication Engineering, Beijing Key Laboratory of Network System Architecture and ConvergenceBeijing University of Posts and TelecommunicationsBeijingChina
  2. 2.School of Electronic Engineering, Beijing Key Laboratory of Work Safety Intelligent MonitoringBeijing University of Posts and TelecommunicationsBeijingChina

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