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US 4,872,021 AGranted
Collinear dipole array with inductive and capacitive phasing
Assignee"Mirta"
InventorsMirtcho S. Tabakov, Nedyalko K. Nedyalkov, Stefan T. Stefanov
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Abstract
The antenna represents colinearly arranged half-wave dipoles. On the side of each final half-wave dipole is a quarter-wave dipole. The connection between the dipoles is alternately capacitive and inductive each providing a phase shift within the range of from 60 to 120 electrical degrees. The terminal of the antenna is asymmetrically deduced from the free end of one of the final half-wave dipoles and the adjacent end of the nearby quarter-wave dipole. This antenna can be used in reception and transmission of electromagnetic energy and shows a considerably increased gain.
Claims4
An antenna comprising
- a plurality of pairs of half-wave dipoles disposed end to end on one common axis;
- a corresponding plurality of inductive circuits, the half-way dipoles of each pair being connected by a respective one of said inductive circuits;
- a free end of a final one of said half-wave dipoles being the active terminal of the antenna;
- two quarter-wave dipoles, each quarter-wave dipole being disposed at a respective end of said common axis adjacent a free end of one of said half-wave dipoles;
- an end of the respective quarter-wave dipole adjacent to said active terminal being the passive terminal of the antenna;
- the pairs being connected to each other and to said quarter-wave dipoles by capacitive connections;
- both said inductive circuits and said capacitive connections providing a phase shift within the range of from 60 to 120 electrical degrees.
4 more elements
Dependencies are inferred from the claim text.