Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1975-09-10
1977-06-07
Lieberman, Eli
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343823, 343894, H01Q 1930
Patent
active
040287092
ABSTRACT:
A yagi antenna having a director element, a half-wave active dipole element, and a reflector element mounted on an antenna boom. All antenna elements are rods that are telescopically adjustable in length from a collapsible position to an operating length for a predetermined frequency of operation, and removable from threaded mounting for storage. The director element and reflector element are slidably adjustable on the antenna boom for independent spacing with respect to the half-wave active dipole element. The antenna boom has two mast support holes; one for horizontal polarization and the other for vertical polarization. A ferrite core member surrounds a coaxial cable connecting the half-wave active dipole element to a coaxial connector, and provides balun action between the coaxial cable and a balanced antenna feed point.
REFERENCES:
patent: 2492989 (1950-01-01), Halstead
patent: 2512725 (1950-06-01), Mock
patent: 2673295 (1954-03-01), Wentworth
patent: 2861267 (1958-11-01), Arrasmith
patent: 3383694 (1968-05-01), Strohmeyer
patent: 3821742 (1974-06-01), Pollard
Bentley, Jr. William F.
Berkowitz Benjamin
Kilpatrick William L.
Luedtke Arthur
Bentley Wm. Ferrel
Lieberman Eli
The United States of America as represented by the Field Operati
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