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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
H01Q11/10—Logperiodic antennas
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Control Of Motors That Do Not Use Commutators
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General properties and experimental measurement techniques- Review of aircraft aerials for the lower frequencies(Aircraft receiving/ADF/ aerials for lower frequencies, discussing small dipole type input impedance, tilt angle and sensitivity product)
Radiation characteristics of a cavity-backed cylindrical gap antenna(VHF cavity backed cylindrical gap antenna input tuning impedance and equatorial radiation patterns controlled by cavity adjustments)
Effect of the ground on signal correlation in space diversity reception of ultra-short waves(Earth effect on signal correlation in space diversity microwave reception antennas, analyzing vertical separation and out of phase signals)