Assertion: antenna's efficiency | /r/AtLocation | the order of 65–70%
Facets:
value: except is concave
type: OTHER
Source sentences:
text: Aperture efficiency is on the order of 65–70%
text: Aperture efficiency is on the order of 65–70% Gregorian – Similar to the Cassegrain design except that the secondary reflector is concave, (ellipsoidal) in shape.