A study on the amplitude of the aperture transient radiation in time domain

Through analytical integral, this paper first obtains the analytic representations of the transient radiation of antenna when the step pulse excites the aperture synchronously. After that it presents a quantitative analysis of relationship of the amplitude of the field to the pulse width of the rectangle pulse, the size of the aperture, the distance and the angle of the observation. The analysis indicates that the pulse duration of the field broadens as the plunge angle of the observation and the size of the aperture increases in /spl theta/ /spl ne/ 0/spl deg/, the pulse width of the field narrows as the distance of the observation increases in /spl theta/ = 0/spl deg/. The amplitude of the field augments yet the pulse width of the field tends to narrow as the plunge angle of the observation increases.