Low-profile dual-polarized ultra-wideband phased antenna array based on metasurface

This paper presents what we believe to be a novel design for tightly coupled antenna arrays aimed at addressing the challenges associated with low-profile designs and dual polarization in ultra-wideband applications. The design features an innovative dual-polarized dipole arrangement and employs a cross-arranged methodology to construct the tightly coupled broadband antenna array. This approach achieves a working bandwidth ranging from the C-band to the Ku-band while maintaining a low-profile design. By incorporating a metasurface onto the tightly coupled array, this design significantly extends the effective working bandwidth while enhancing radiation performance throughout the beam coverage range. A 400-element dual-polarized array with an integrated phased array system is designed, fabricated, and measured. The antenna array is capable of ±60 ∘ beam scanning, with a relative bandwidth of 100% and a profile height of 0.38 wavelengths (at 18 GHz). This dual-polarized shared-aperture broadband phased array antenna not only facilitates flexible polarization synthesis but also offers a working bandwidth suitable for diverse application scenarios. Additionally, the implementation of an aperture reuse design minimizes the required aperture area. Collectively, these advancements enhance the overall performance of contemporary communication and radar systems, highlighting substantial application potential.