A Compact, High Gain, Dual-Band Meta-Surface Antenna

This paper presents a novel design for meta surface antenna, demonstrating simultaneous functionality across the 24 GHz millimeter wave (mmWave) radar band, 5G n257 band, and n258 band. The proposed antenna deviates from the commonly used horn design and instead integrates a wide-band stacked patch antenna as its feeder. A dual-layer meta-surface featuring rectangular patches is employed to focus electromagnetic waves and achieve high gain. A simplified formula is introduced for arranging the meta-surface unit cells. The 3-D simulation results indicate a peak gain of 23.9 dBi in 27.5 GHz when the thickness of meta-surface is 3mm, and 3 peak gain bands for thickness be 4mm, with a meta-surface area of 82 mm × 82 mm which can be integrated to the radome and PCB area 6 mm × 6 mm. Since its high gain, compact area and dual working bands, the antenna exhibits great application potential in millimeter-wave applications, including wireless energy harvest, radar and 5G communication.