Communications: radio wave antennas – Antennas – Plural separate diverse type
Patent
1988-04-01
1990-03-06
Hille, Rolf
Communications: radio wave antennas
Antennas
Plural separate diverse type
343771, 343799, 343821, 343890, H01Q 2124
Patent
active
049070088
ABSTRACT:
An antenna for circularly polarized television transmission comprising, an elongated coaxial waveguide having inner and outer conductors, the outer conductor of the waveguide having a multiplicity of slots spaced along the length and around the circumference of the outer conductor for radiating horizontally polarized energy, a multiplicity of dipoles mounted on the outer surface of the outer conductor and spaced along the length and around the circumference of the outer conductor for radiating vertically polarized energy, each of the dipoles being associated with one of the slots so that the combination of the horizontally and vertically polarized radiation produces circularly polarized radiation, and coupling means for coupling electromagnetic energy from the interior of the waveguide to the slots and the dipoles, the coupling means for both the slots and the dipoles picking up electromagnetic energy from the interior of the waveguide in a common transverse place.
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Andrew Corporation
Hille Rolf
Rudisill Stephen G.
Wimer Michael C.
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