Matching model and computing of multi-capacitive loading resistances for ps pulse transmission line

It is pointed out that the key problem is multi-capacitive loading resistances matching for increasing microstrip-tapped sampling speed. According to distributed parameter theory and microwave transmission line theory, the partial matched model is proposed and the computing formulas for resistance matching are deduced. The results of numerical analysis and circuit simulation show that ps pulse transmission line of different operating frequency and multi-tapped capacitances can be well compensated by the partial matched method, so the distortion to every sampling waveforms of transmission line is very small, the effect of compensation is obvious and microstrip-tapped sampling speed is increased.