Assertion: antenna's number | /r/CapableOf | determine at a cost of gain
Facets:
value: in the other directions
type: LOCATION
Source sentences:
text: The number of turns in the helix determines how directional the antenna is: more turns improves the gain in the direction of its axis at both ends (or at 1 end when a ground plate is used), at a cost of gain in the other directions.