Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1981-07-06
1984-11-20
Lieberman, Eli
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343768, G01S 144
Patent
active
044841965
ABSTRACT:
An antenna drive arrangement for a very high frequency omnidirectional range (VOR) navigation system for aircraft. The antenna has two vertically arrayed antenna elements located above a ground plane, and reference and variable phase signals are distributed to each of the antenna elements in amplitude and phase relationship selected to produce a null in the H-component of the radiated field which is substantially tangential to a projection of the ground plane. The null is located in a region of the field disposed radially outwardly of the antenna array.
REFERENCES:
patent: 2286839 (1942-06-01), Schelkunoff
patent: 2898593 (1959-04-01), Ruze
patent: 3427622 (1928-10-01), Kandoian et al.
patent: 3964067 (1976-06-01), Lucas
Lucas James G.
Young Alan C.
Lieberman Eli
The Commonwealth of Australia
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