Assertion: radar's antenna | /r/HasProperty | impractical
Facets:
value: to steer by mechanical mean
type: CAUSE
Source sentences:
text: Moreover, higher gain radar ( narrower beamwidth ) would require much bigger antennas which are unsuitable for fast scanning (To achieve useable accuracy at low-frequency, radar would require antennas of enormous size which could be impractical to even steer around by mechanical mean).