FINITE-DIFFERENCE TIME-DOMAIN SIMULATION OF TRANSIENT PULSES WITH IMPROVED EXCITATION-FUNCTIONS

New excitation-functions are presented that can be used to simulate tr ansient pulses applying the finite-difference time domain (FDTD) metho d. The functions have a seriously improved numerical behaviour in the FDTD-grid compared with usually used excitation-functions with Gaussia n upgrade form. It is also demonstrated how capacitors can be implemen ted at the borders of the solution volume. An example of a shortened l ine with a loaded capacitor at the entry is given to illustrate the ad vantages of the new excitation-functions.