Assertion: rhombic antenna | /r/HasProperty | designed in the 1931
Facets:
value: by harald friis
type: OTHER
value: by edmond bruce
type: OTHER
Source sentences:
text: The rhombic antenna was designed in the 1931 by Edmond Bruce and Harald Friis, It was mostly commonly used in the high frequency (HF) or shortwave band as a broadband directional antenna.