In the practice of antenna time domain near field measurement

the biggest errors are introduced by the time base jitter and the amplitude changing of pulse generator.Comparing with the errors caused by amplitude changing

the errors caused by time base jitter are more serious that it can result in unbearable aberrance of measurement pattern.To deal with this problem

the technique of time base correction and amplitude correction is presented in this paper.Besides measuring channel

this technique adds a reference channel in measuring system.Pulse generator’s time base jitter and amplitude changing can be obtained from the reference channel

and be adopted to correct measuring channel’s signal.The practical measuring results have proved this method’s reliability.From comparing experiments

we can find that adopting this technique

the sensitivity of time domain near field measurement is similar to the sensitivity of frequency domain near field measurement

or even better than it.