Discussion
What is a swept frequency measurement?
Answer: D
Sweeping records the quantity as a function of frequency in one operation, which is how impedance and return loss are normally measured and how time domain gating obtains its data. Sweeping angle at fixed frequency is a pattern cut, which is the complementary operation. Band averaging discards the variation rather than recording it. Most antenna characterisation consists of sweeping one variable while holding the other, and knowing which is which keeps the data organised.
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