A study on the measuring of relative permittivity of microwave PCB with frequency for the numerical analysis of EMI

EMI 수치해석을 위한 주파수에 따른 마이크로파 인쇄회로기판의 비유전율의 측정에 관한 연구

In this paper, to anlayze electromagnetic distribution, measure the variation of relative permittivity of Glass-epoxy substrate for Computer-main-board and Tenon substrate for handphone or PCS in the frequency range $100[MHz]{\sim}1[GHz]$, in room temperature. To measure relative permittivity, suggested the Microstripline method. As the frequency increase, the variation of relative permittivity of Glass-epoxy is bigger than Tefoln's. And simulate the electromagnetic distribution on the PCBs in the infinite region applying the open boundary condition with these results by Finite Element Method.