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Parasitic circular patch antenna with continuously tunable linear polarization using liquid metal alloy
Author(s) -
Xu Chang,
Wang Yi,
Wu Jianhua,
Wang Zhengpeng
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31640
Subject(s) - materials science , circular polarization , microstrip antenna , patch antenna , optics , linear polarization , center frequency , coaxial antenna , optoelectronics , antenna (radio) , microstrip , physics , electrical engineering , engineering , band pass filter , laser
This article presents a center‐feed parasitic circular patch antenna with continuously tuning linear polarization performance. Eutectic gallium‐indium liquid metal alloy is employed to tune the angle of linear polarization continuously. The antenna is feed at the center of a circular patch with a ring slot. The rotational symmetry of the antenna helps maintain the impedance and radiation pattern at different polarization angles. The liquid metal is contained in a 1 × 1 mm channel etched in a polymethyl methacrylate cylinder. The polarization angle is tuned by controlling the location of a short bar of EGaln. The center resonant frequency of the demonstrated antenna is 5.19 GHz with a −10 dB impedance bandwidth of 0.24 GHz.