Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1992-08-27
1994-06-07
Hajec, Donald
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343812, 343815, H01Q 2112, H01Q 122
Patent
active
053193806
ABSTRACT:
According to the invention, an antenna curtain, particularly a dipole curtain of an antenna in the decametric wave range is formed of a plurality of cables. Radiators are provided arranged essentially in a vertical plane, defining a radiator plane, in a plurality of rows located one atop another and in one column or in a plurality of columns next to one another. A line system device is provided for feeding the radiators of each column through conductive lines. A single catenary is provided to provide sufficient tension for the vertical or slightly inclined lines of the line system. An approximately horizontal spreader is arranged above each of the columns essentially perpendicularly to the radiator plane. The horizontal spreader is positioned beneath the catenary and above the topmost radiator, preferably spaced a small distance in height above the topmost radiator. In the case of plural columns, horizontal spreaders are preferably arranged at equal distance in height in all columns above the topmost radiator. At least two supporting cables of the radiators and lines are provided for a column and are attached on one spreader at distances b, b1, b2 etc. The approximately vertical supporting cables or approximately vertical lines of the line system, of one column are attached at their lower ends essentially non-yieldingly and are spaced farther apart from one another at the bottom (distances a, a1, a2, etc.) than at the top such that a>b, a1>b1, a2>b2.
REFERENCES:
patent: 1964190 (1934-06-01), Bohm et al.
patent: 3373434 (1968-03-01), Lorenzo et al.
patent: 3618110 (1971-11-01), Solberg
patent: 5146233 (1992-09-01), Ursenbach
Hajec Donald
Le Hoang-anh
Telefunken Sendertechnik GmbH
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