Abstract
A compact metasurface (MTS) antenna with a dimension of 20 mm × 20 mm consisting of non-uniform fractional meta-unit (n-MTS) cells has been proposed in this article. The n-MTS shows distinctive electromagnetic characteristics compared to conventional MTS, that is, the E-field surface waves on the n-MTS are singularly co-extending in nature, exhibiting an e-TM30 mode (e—extraordinary). The higher order modes with n-MTS significantly improves the antenna resonant properties at (5–6) GHz Wi-Fi band. The potential improvement in antenna modal parameters are showcased with numerical approach for validations in proximity to the theoretical quantitative metrics. A MTS antenna array configuration of dimension 40 mm × 40 mm with a RF power-divider feeding arrangement has been proposed, operating at dual-bands (5.45, 6.4 GHz) with radiation gain >8 dBi and radiation efficiency >80% (at dual-bands). The unit cell n-MTS configuration has sharp resonances and unique meta-parameters are achieved at operating frequency, enabling existence of higher-order mode in a low-profile and proliferates for compact antenna design embodiment. The prototype antennas are fabricated and measured, which shows good correlation between simulation and test results, to be implemented in Wi-Fi applications.
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