ZENITH RECEPTION ANTENNA Russian patent published in 1999 - IPC

FIELD: antenna equipment, in particular, HF antennas using ionospheric waves for short-range and middle-range communication. SUBSTANCE: device has dipole and unit for isolation of linear-polarization electromagnetic waves with arbitrary orientation of polarization plane. Each arm of dipole is positioned at angle to Earth surface and is designed as closed circuit formed by conductor. Ratio of longitudinal length of each arm of dipole to maximal transversal distance between conductors is not less than 0.5. EFFECT: increased efficiency of reception in conditions of polarization signal fading due to simultaneous independent reception of steep-grade ionospheric waves with vertical and horizontal polarization. 5 dwg