Transient behavior of scanning antenna with elliptical aperture

In many modern applications the use of antennas of huge dimensions and time pulses of very short duration creates a situation where the transient behavior is of practical importance. The transient behavior of aperture antennas has been studied by Polk [1]. The formula derived by him is based on the frequency spectrum method of analysis. But as D. K. Cheng and F. I. Tseng pointed out [2], the formula is difficult to be used. Recently, a new analytical method in time domain was proposed by S. M. Lin for the case of rectangular aperture [4].