The simulation and analysis of PCB dielectric properties based on S parameter inverse technique

• 1、Information and Electrical Engineering Institute ,China University of Mining and Technology

Abstract：To improve the signal transmission quality in the PCB, the key is to determine the electrical characteristics of the substrate material, the control signal line characteristic impedance. With high frequency more and more electronic products, as the flight IC other components to connect the PCB support the body in terms of its performance directly affects the performance of the system after the device assembly of the electrical parameters of transmission lines is becoming increasingly important. This paper first describes some PCB transmission line materials, development of knowledge and concepts, by means of some classical formula from the S parameters of transmission line onto a PCB transmission line (microstrip, stripline) the dielectric constant and dielectric loss angle; then HFSS high frequency simulation software, carried out for different transmission line modeling and simulation, and simulation results were compared. Finally, simulation results verify the correctness of the formula.

Keywords： S parameters transmission line dielectric constant (DK) dielectric loss angle (DK) characteristic impedance