ads transient simulation

I am having trouble performing transient simulation of a microstrip circuit in ADS. The simulation is indicating undersampling of response of inductor and capacitor and is suggesting to increase ImpMaxFreq or decrease allowed number of points but this is not working. Does anyone have any idea about it.

In my experience, the trouble is that only microstrip lines, not any discontinuity, should be included in transient simulation. Any T junction or step for example will couse strange phenomena in response, you might even and up with non-causal response!

flyhigh