Discussion
What does time gating on a modern antenna range achieve?
Answer: B
A reflected path is longer than the direct one, so transforming the swept frequency response to the time domain and windowing out the late arrivals removes the reflection. It allows respectable measurements in rooms that are far from anechoic. Speed, synchronisation and averaging are separate benefits of modern instrumentation. Using the time of arrival to separate wanted from unwanted signals is the same principle radar uses, applied here to a measurement problem.
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