Optimum design of connector for wide band GTEM cell

The design of high frequency input connector is especially important for the development of wide band gigahertz TEM cell (GTEM cell). The software based on FIT is used to calculate VSWR and optimize design of input connector. The transition section of inner conductor, structure of dielectric gasket and circinal to quadrate structure are optimized by modeling and simulation. The problem of design and manufacture of high frequency input connector is discussed and the general performance of GTEM cell is analyzed. The measured results show that the upper frequency of the GTEM cell with such a connector can reaches 18GHz and the VSWR is less than 1.5.