Electrical characterization for performance-driven printed circuit board

During the initial design stage, PCB material selection, platform designers would like to have the accurate loss measurement to meet the channel requirement, because the PCB material contributes largely to the platform cost. In this paper, we analyze how transmission line design affects insertion loss quantity at high operation frequency. The insertion loss at 12.89GHz is measured, and it is convenient to directly correspond to channel loss simulation for 25G applications. Moreover, eight material types are validated and compared by systematic measurement. We utilize delta-L methodology to measure PCB material electrical characteristics, and show a possible way to enable PCB ecosystem having a standardization measurement procedure.