H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
H01Q11/04—Non-resonant antennas, e.g. travelling-wave antenna with parts bent, folded, shaped, screened or electrically loaded to obtain desired phase relation of radiation from selected sections of the antenna
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Variable-Direction Aerials And Aerial Arrays
(AREA)