Study of transmission characteristics of two kinds of deformed dual-ridge waveguide

In order to find a symmetrical dual-ridged waveguide with optimal transmission characteristics,two novel dual-ridged waveguides with circle and ellipse ridges respectively were put forward.The influence of both the deformed dual-ridged waveguides on the transmission characteristics of the waveguide was analyzed by means of finite element method.The cut off wavelength and single-mode bandwidth were calculated for different ridge dimensions.The field patterns of dominant mode and the curve for the effect of deformation on the cutoff wavelength and brand width were drawn.Finally,the relationship between the transmission characteristics and the dimension of the ridges was analyzed.It is shown that these results can provide valuable reference of application and study of the deformed dual-ridge waveguides and provide instructions for miniaturization of ridged waveguide apparatus.