Communications: radio wave antennas – Antennas – Fractional – multiple – or full wave length linear type
Patent
1984-01-13
1986-03-04
Lieberman, Eli
Communications: radio wave antennas
Antennas
Fractional, multiple, or full wave length linear type
343891, H01Q 932
Patent
active
045742901
ABSTRACT:
A high gain vertically polarized antenna section includes a hollow conductive central cylinder which is used to encase feed lines and power dividers used for feeding the antenna section. The cylinder is surrounded by an array of symmetrically disposed vertical radiating elements arranged in a plurality of symmetrical columns. A plurality of ring transmission lines or shorted quarter-wave stubs are utilized to distribute electrical energy to each of the vertical radiators in a manner such that the instantenous current flow is in the same direction in all of the vertical radiating elements. Any horizontal currents in the ring transmission lines or shorted quarter-wave is substantially cancelled by out-of-phase horizontal currents.
REFERENCES:
patent: 2213692 (1940-09-01), Cork et al.
patent: 2267613 (1941-12-01), Lindenblad
patent: 2533900 (1950-12-01), Shanklin
patent: 2539433 (1951-01-01), Kandoian
patent: 2781513 (1957-02-01), Peterson
patent: 3000008 (1961-09-01), Pickles
patent: 4180820 (1979-12-01), Johns
patent: 4203118 (1980-05-01), Alford
IEEE Transactions on Vehicular Communications "A New Series of Commercial Base Station Antennas", G. J. Bischak, pp. 24-27, Sep. 1964.
"High Gain Side Firing Hellical Antennas for Ultrahigh Frequency Television Broadcasting", American Institute of Electrical Eng., vol. 73, 1954, pp. 135-138.
Downey Joseph T.
Lieberman Eli
Motorola Inc.
Nichols Daniel K.
Roney Edward M.
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