Comparatively Study of Coaxial Waveguide and Open Coaxial Cavity

In this paper, the computational formula of field distribution in a coaxial waveguide and the field distribution, resonant frequency and Q factors of open coaxial resonator are introduced. The S21 and the field profile of the TEM mode in a coaxial waveguide, and the field profile and E-field of the mode in a coaxial resonator is gained by the software CST microware studio. The truth that an open coaxial cavity is virtually a slow-varied section coaxial waveguide is gained.