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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2022-12-25
A Wideband Dual-Cavity-Backed Polarization Reconfigurable Antenna Based on Liquid Metal Switches
By
Yuwei Zhang,

    Prof. Yuwei Zhang

    School of Electronics Engineering

    Heilongjiang University

    China

    Homepage

Shu Lin,

    Dr. Shu Lin

    Harbin Institute of Technology

    China

    Homepage

Libo Wang,

    Dr. Libo Wang

    School of Electronics and Information Engineering

    Harbin Institute of Technology

    China

    Homepage

Qun Ding

    Prof. Qun Ding

    School of Electronics Engineering

    Heilongjiang University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 108, 75-83, 2023
doi:10.2528/PIERL22110302 | Google Scholar

Abstract
This letter presents a wideband polarization reconfigurable antenna based on liquid metal (LM) switches. It consists of single-fed crossed bowtie dipoles, a parasitic element grounded via a metallic post, a dual-cavity-backed reflector and liquid metal switches. The two arms of one dipole are loaded with two symmetrical identical slots, and on top of the slots, two sets of fixed-length movable liquid metal columns filled in polytetrafluoroethylene (PTFE) tubes are attached as switches. The altering between linear polarization (LP) and circular polarization (CP) can be achieved by changing the positions of the liquid metal switches. The dual-cavity structure is applied to obtain unidirectional radiation and enhance the circularly polarized performance. A prototype with overall size of 127 × 127 × 57 mm3 is designed and fabricated. The measured results indicate that the impedance bandwidth (IBM) of the antenna is from 1.06 to 2.46 GHz (79.54%) and the axial ratio bandwidth (ARBW) is from 1.39 to 1.91 GHz (31.52%) for CP state. In addition, the IBW for LP state is from 1.06 to 2.30 GHz (73.81%). Moreover, the peak gains can reach 7.73 dBic in CP state and 9.21 dBi in LP state.
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Citation
Yuwei Zhang, Shu Lin, Libo Wang, and Qun Ding, "A Wideband Dual-Cavity-Backed Polarization Reconfigurable Antenna Based on Liquid Metal Switches," Progress In Electromagnetics Research Letters, Vol. 108, 75-83, 2023.
doi:10.2528/PIERL22110302
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