High-frequency, transient response of microstrip lines

Two expressions for the impulse response function of resistive microstrip transmission lines, including the effects of frequency-dependent field penetration (classical skin effect), are derived. One expression is complete in the sense that the three parameters on which it depends are expressed in terms of the material and geometrical properties of the stripline. The other expression is unexpectedly simple in form and depends on only two parameters, propagation delay and effective response time. At present, these parameters must be determined by matching the response predicted by both expressions to representative pulses. These then agree to ±1% with each other and with recent transient experimental results of J.S. Loos and A.H. Endvik. These expressions should find application in the design and simulation of multi-gigabit-per-second, digital pulse transmission over microstrip lines