Miniature water monopolar patch antenna using transparent high-permittivity liquid substrate

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Original languageEnglish
Pages (from-to)475-476
Journal / PublicationElectronics Letters
Issue number10
Online published3 Mar 2020
Publication statusPublished - 14 May 2020


A miniature water patch antenna using high-permittivity liquid substrate is demonstrated. The utilised liquid substrate is ethyl acetate, which is an optically transparent liquid with permittivity of 7.8 over microwave frequencies. It turns out that when using ethyl acetate as the middle substrate, the diameter of the circular water patch can be decreased by 48% compared with the case using air as the middle substrate, and a wide bandwidth of 36% can be obtained. The results show that the ethyl acetate is an optional candidate to realise a compact transparent antenna.