Research of dual-polarized waveguide antenna with high efficiency for full-frequency re-use

脊状波导天线由于波导中脊的作用，可以实现宽带结构。双极化天线可以由脊状波导缝隙天线和边缘缝隙波导天线组成。利用谱域格林函数，通过特征值分析计算了脊波导的截止频率。结果与HFSS的结果吻合较好。设计了消光比小于10-6、透射率在0.1 ~ 2.9 THz的太赫兹线栅偏振器，采用模式匹配的方法对极化波进行控制。

The ridged waveguide antenna can realize a broadband structure due to the effect of the ridge in the waveguide. A dual-polarized antenna can be constructed from a ridged waveguide slot antenna and an edge slot waveguide antenna. Cutoff frequencies of a ridged waveguide are calculated by eigenvalue analysis using the spectral domain Green's function. The results coincide well with HFSS results. The terahertz wire-grid polarizer with high extinction ratio less than 10-6 and high transmittance from 0.1 to 2.9 THz is also designed for the control of the polarized wave by mode-matching method.