An optically transparent coplanar L-probe fed antenna based on capacitively coupled array of patches

Pingle Liang and Juan Chen

Journal of Electromagnetic Waves and Applications, 2024, vol. 38, issue 1, 122-133

Abstract: An optically transparent antenna fed by a coplanar L-probe is proposed in this paper. Indium-doped tin oxide (ITO) with a sheet resistance of 3.5 Ω/sq etched on a soda-lime glass substrate is used as radiation array and ground to achieve high optical transmittance. TM $ _{10} $ 10 and TM $ _{20} $ 20 modes are excited simultaneously to expand work bandwidth. The fabricated antenna achieves a –10 dB reflection bandwidth of 27.5% from 4.7 to 6.2 GHz with the overall size of 42 mm × 42 mm × 3.3 mm. Different from many antennas composed of ITO, the proposed antenna exhibits directional radiation patterns with the maximum realized gain of 4.6 dBi and the maximum efficiency of 61%. Meanwhile, the optical transmittance of the antenna can reach above 58%.

Date: 2024
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DOI: 10.1080/09205071.2023.2277188

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