volume | PIER Journals

Abstract

A novel frequency and polarization reconfigurable water patch antenna is proposed for radio communication in the UHF band. Based on theoretical analysis and simulation results, water is an ideal material for designing transparent liquid ground. Water enhances outstanding transparency, excellent aesthetics, and high optical stealth performance for a wider range of application scenarios. The entire structure is made with polyvinyl chloride material and distilled water, except for the feed structure. By filling different cavities with liquid water, six different operating states are obtained in 1.924-2.5 GHz (26.1 %), 1.67-2.33 GHz (33 %), 0.644-2.288 GHz (112.1 %), 1.975-2.54 GHz (25 %), 1.748-2.108 GHz (18.7 %), and 1.988-2.348 GHz (16.6 %), achieving frequency reconfigurability. The antenna can be flexibly switched between linear polarization (LP) and two right-handed circular polarization (RHCP) states. The results show that the 3 dB axial ratio (AR) bandwidth covers 1.93-2.08 GHz (7.5 %) and 2.06-2.132 GHz (3.5 %). The antenna achieves high optical transparency of 100 % and a peak gain of 7.97 dBi.

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Dr. Lei Li

Ms. Jing Gao

Dr. Jingchang Nan