Global Limitation on Fast Switching by Semiconductor Devices

One of the important problems of UWB short pulse Electromagnetic is the pulse generation. The core of a pulse generator is a fast switch, a device, which could be switched between two states “off” and “on” with low and high conductance. Difference between the conductances must be as large as possible. Many types of semiconductor devices could be used for the switching. For many of them figures of merit, which shows their limitations, are well known (for an example – time of flight limitations).