Loop | Chicago Loop | Osaka Loop Line | Loop (band) | Wireless local loop | Potteries Loop Line | North Tyneside Loop | Capitol Loop | Oldham Loop Line | loop | Holmdel Horn Antenna | Antenna TV | Texas State Highway Loop 335 | Texas State Highway Loop 12 | Texas State Highway Loop 1 | Parabolic antenna | parabolic antenna | Omnidirectional antenna | Loop Retail Historic District | loop (music) | Log-periodic antenna | In The Loop With iVillage | Innovative Space-based Radar Antenna Technology | horn antenna | Grand Loop Road Historic District | Bright Antenna | Yagi-Uda antenna | wireless local loop | vertical loop | stem-loop |
The earliest experiments in RDF were carried out in 1888 when Heinrich Hertz discovered the directionality of an open loop of wire used as an antenna.