Selection of "Time Window" in Time Domain Measurement

In this paper, in order to determine the optimal "time window" length selection scheme, the ps-level ultra-wideband antenna time domain far-field measurement system is used to select different "time window" to measure the antenna patterns of different frequency bands, and compare them with the frequency domain measurement results. The measurement results show that when selecting the "time window", it should not be too long or too short. It should not only contain the main part of the pulse signal received by the antenna in all directions, but also ensure that it does not contain environmental noise and background clutter.