A Millimeter-Wave Dual-Band Wideband Metasurface Antenna Based on Printed Ridge Gap Waveguide Feeding

In this paper, a millimeter-wave dual-band metasurface antenna is proposed with high gain and wide bandwidth. The proposed antenna is composed of a printed ridge gap waveguide, two T-shaped slots, and the metasurface. All target modes of the metasurface are excited by two T-shaped slots. The metasurface loaded on the slots enhances the radiation performance and improves the gain. An example of the proposed antenna is designed and simulated with the −10-dB bandwidths of 11.3% (26.73–29.83GHz) and 11.3% (38.03–42.6 GHz), and the maximum gains of 9.85 dBi and 10.33 dBi.