Simulation of Large Electromagnetic Structures with an Application to Quasi-optical Amplifier

Quasi-optical structures are very large to be simulated using the conventional FDTD techniques. In this paper a combined FDTD/Convolution technique is developed to reduce the computational load in the simulation of such structures. This technique reduces the computational burden by breaking the system into smaler modules each can be characterized by an impulse response matrix. The overa3l system response is then obtained by subsequently interconnecting the individual responses together via a convolution process.