一种双开口环耦合结构的超宽带双频段超表面极化转换器OA

A novel reflective metasurface polarization converter was proposed to meet the demand for ultra-wideband,multi-band,high-efficiency,and compact polarization converters in the microwave regime.The device features a metal-dielectric-metal sandwich configuration,comprising a full-copper backplane,a low-loss polytetrafluoroethylene(PTFE)dielectric layer,and a top copper resonant layer with a double split-ring coupling structure.Simulation results show that the converter achieves a cross-polarization conversion ratio(PCR)above 90%over an ultra-wide band of 9.92-28.01 GHz,corresponding to a relative bandwidth of 95.38%,and maintains good performance for incident angles up to 30°.Moreover,a PCR approaching 100%is attained in a high-frequency narrow band of 34.58-34.66 GHz,demonstrating a dual-band response that effectively combines ultra-wideband coverage with high-frequency narrowband operation.The proposed design exhibits the advantages of ultra-wide bandwidth,dual-band functionality,high conversion efficiency,and structural compactness.It can therefore serve as a promising device candidate for multifunctional integrated RF systems and integrated equipment requiring both broadband sensing and point-to-point communication,with potential applications in microwave communications,radar detection,and imaging.