Influence of Different Dielectric Thickness on Test Results of PCB Characteristic Impedance
The final product of printed circuit board(PCB)should not only ensure that its short circuit and open circuit are qualified,but also ensure that the impedance value meets the electrical performance requirements.The impedance in PCB refers to the characteristic impedance of the transmission line.In the high-speed and high-frequency circuit,only the characteristic impedance matches the load impedance,the reflection of the signal is minimum and the integrity is higher.In the design impedance,PolarSi9000 software is often used to simulate and calculate the relevant design parameters of PCB.However,in the actual production process,there is often a difference between the measured impedance value and the simulated value.Through theoretical analysis,experimental design,experimental summary and analysis,this paper introduces the influence of interlayer dielectric thickness of printed circuit board on the measured impedance,which provides a certain solution for PCB impedance design.
NETL
NSTL
万方数据
维普
