Radiofrequency Transparent Uniaxial Dual-Polarized Metasurface with Ultrawide Brewster Angle Stability

Electromagnetic (EM) selective structures with high transmission and ultrawide angular coverage are essential for applications ranging from military fields, such as high-speed aircraft, to civilian domains, such as 5G communications, enabling omnidirectional spatial EM information perception. However, traditional EM selective structures suffer from increasingly severe characteristic impedance mismatches under the large-angle oblique incidence of EM waves. To overcome this dilemma, a polarization-insensitive uniaxial dielectric-magnetic metasurface is proposed with ultrawide Brewster angle stability to realize perfect radiofrequency transparency. It is theoretically demonstrated that a uniaxial dielectric-magnetic slab can exhibit ultra-wide-angle transmission properties while maintaining polarization insensitivity. As a proof of concept, a uniaxial dielectric-magnetic metasurface structure is designed, fabricated, and measured to simultaneously achieve wide-band and wide-angle radiofrequency transparency phenomena with transverse electric and transverse magnetic polarization responses. This study fundamentally resolves the theoretical challenge of characteristic impedance mismatch in traditional EM surfaces under large-angle oblique incidence, achieving an unprecedented realization of ultrawide angular, high-efficiency transmission for arbitrarily polarized electromagnetic waves.