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Design and analysis of a CPW-fed antenna with triple polarization reconfigurability

Published online by Cambridge University Press:  31 March 2025

Yang Wu ,
Ningning Lu ,
Rui Ren  and
Hucheng Sun Open the ORCID record for Hucheng Sun [Opens in a new window]
Yang Wu
Affiliation:
Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing, China
Ningning Lu
Affiliation:
Beijing R&D Center, The 54th Research Institute, China Electronics Technology Group Corporation, Beijing, China
Rui Ren
Affiliation:
College of Mechanics and Materials, Hohai University, Nanjing, China
Hucheng Sun*
Affiliation:
Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing, China
*
Corresponding author: Hucheng Sun; Email: [email protected]
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Abstract

In this paper, a polarization-reconfigurable antenna fed by a coplanar waveguide (CPW) using a stepped structure is presented. The main parts of the proposed antenna consist of a CPW-fed monopole and four branches. After studying and analyzing the structure and mechanism of the antenna, it was found that different polarizations can be generated by adjusting the antenna’s structure. Based on the mechanism, four PIN diodes are utilized and inserted between the four branches and the monopole for the switching. By controlling the ON/OFF states of the four PIN diodes, the antenna can switch among left-hand circular polarization (LHCP), right-hand circular polarization (RHCP), and linear polarization (LP). The optimized antenna has been fabricated and measured. Measured results indicate that the antenna’s −10-dB impedance bandwidth for LP is 15.93%, covering the frequency range from 2.3 to 2.71 GHz. The overlap bandwidth of −10-dB impedance and 3-dB axial ratio for the LHCP mode is 18.96%, covering frequencies from 2.1 to 2.54 GHz. For the RHCP mode, the overlap bandwidth is 20.5%, covering frequencies from 2 to 2.52 GHz. At all the three polarization modes, the antenna is capable of covering the 2.4-GHz WLAN band (2400–2480 MHz) as well as the LTE TD 2300 band (2300–2400 MHz).

Keywords

circular polarizationlinear polarizationPIN diodepolarization reconfigurable antenna
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 11
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Copyright
© The Author(s), 2025. Published by Cambridge University Press in association with The European Microwave Association.

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