High-Aperture-Efficiency Fabry-Pérot Cavity Antenna Using Hybrid-Mode Metasurface

A high-aperture-efficiency Fabry-Pérot (FP) cavity antenna using a hybrid-mode metasurface is proposed. A finite-size metasurface supports the FP cavity resonance and a TE surface wave resonance simultaneously. The combination of the two resonances results in the excitation a new hybrid mode, generating a more uniform field amplitude distribution. A directivity of 15.45 dBi and a high aperture efficiency of 94.36% are achieved. The prototype FP cavity antenna shows a good agreement between the measured and simulated results.

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