A Novel Structure of Microstrip-Coaxial Vertical Interconnection in Ka Band

A novel design of microstrip-coaxial vertical interconnection is presented in this paper. As frequency increases, the discontinuity between transmission line and vertical interconnection can reduce the transmission characteristics of the circuit, which has adverse effects on the performance of RF modules. In this paper, the full-wave HFSS simulation software is used for modeling and simulation of the novel structure. On the basis of fabrication error analysis, the results show that the insertion loss is less than 0.8dB and the reflection coefficient is less than -15dB from 26.5 to 40GHz.