Broadband multifunctional polarization converter based on sine structure

The invention discloses a broadband multifunctional polarization converter based on a sine structure. The converter is composed of a bottom gold plate, a middle dielectric substance layer and a top sine gold plate. According to the invention, broadband multifunctional polarization conversion within the frequency range of 7.4-8.3 THz can be realized, and the polarization conversion ratio (PCR) is greater than 0.8; almost perfect line-to-left-hand circular polarization conversion can be realized in a frequency range of 7.2 to 7.4 THz; and cross polarization conversion can be realized in a frequency range of 7.7 to 8.2 THz. Therefore, a certain theoretical and data support is provided for the design of a high-performance broadband multifunctional polarization converter. The invention has the advantages of novel structure and excellent performance, and is expected to be widely applied to the design of high-performance and multifunctional polarization devices in the future. 本发明公开一种基于正弦结构的宽带多功能偏振转换器，该转换器由底部金板、中间介电质