Wideband high-gain multiresonance antenna based on polarization-dependent metasurface

In this article, a novel polarization-dependent metasurface (PDMS) structure is presented and applied to realize a wideband high-gain antenna with multiple resonances. The PDMS element is obtained by cutting slots into the square patch unit cell of conventional metasurface (MS). Very different from the conventional MS structure, the proposed PDMS element exhibits different reflection phases and resonance frequencies, depending on the polarization state of the incident plane wave. By properly tailoring the reflection-phase curves under different polarizations, a proper PDMS structure is introduced. Then, by arranging the PDMS elements along different orientations, a multiresonance radiator can be realized. When applying the proposed radiator to the slot-coupled MS antenna, one broadband PDMS-based antenna with multiple adjacent resonance frequencies can be realized by the combination of coupling slot-mode and PDMS modes. For verification, a PDMS radiator with 4 x 4 unit cells is designed accordingly and applied to realize one C-band broadband PDMS-based antenna in a low profile (0.06 lambda(0)). The measured results of the fabricated prototype PDMS-based antenna exhibit a large -10 dB impedance bandwidth of 55% (4.31-7.58 GHz), a maximum available gain of 10.898 dBi, and a 2-dB gain bandwidth of 30.81% (5.1-6.96 GHz).