nutating feed造句

A nutated feed offsets the antenna at an angle to a fixed feed horn, and then rotates the antenna.
A variation of a nutated feed makes the feed move in a small circle, rapidly and continuously changing the pointing direction of the beam.
Basically conical scan ( of the non-revolving nutating feed type ), the size of the scan cone cyclically increased and decreased roughly twice a second.
It's difficult to find nutating feed in a sentence. 用nutating feed造句挺难的