Assertion: antenna's characteristic | /r/HasProperty | constant
Facets:
value: almost
type: DEGREE
value: over its entire frequency range
type: TEMPORAL
Source sentences:
text: Being log-periodic, the antenna's main characteristics (radiation pattern, gain, driving point impedance) are almost constant over its entire frequency range, with the match to a 300 Ω feed line achieving a standing wave ratio of better than 2:1 over that range.