Communications: radio wave antennas – Antennas – Slot type
Patent
1998-11-20
2000-10-24
Wilmer, Michael C.
Communications: radio wave antennas
Antennas
Slot type
343768, H01Q 1312
Patent
active
061374482
ABSTRACT:
A digital signal, beam radiation antenna consisting of a cylindrical mast having an inner tubular conductor and an outer tubular conductor, and means for exciting said inner conductor to establish a traveling wave internal to said antenna. Moreover, there are spaced slots in said outer conductor defining an illumination aperture coupled to the inner conductor and for radiating the beam from the antenna. This establishes the illumination along the aperture so as to produce a high beam tilt of the order of 0.6-3.5 degrees from the horizontal for the beam radiation; further, for varying the phase from layer to layer, such that there are substantially no null variations in the elevation pattern of the beam.
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General Signal Corporation
Wilmer Michael C.
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