Omnidirectional cylindrical antenna
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United States of America Patent
Stats
-
Feb 6, 1990
Issued Date -
N/A
app pub date -
Jul 13, 1988
filing date -
Jun 10, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An antenna array with circular symmetry made up of an array of cylindrica shaped printed circuit elementary antennas. It is made up of small radiating sources which are placed in superposed circles on a cylindrical surface. The sources are distributed at constant angular intervals on the circles. They have little coupling between themselves. On each circle of sources, they are energized in phase and with the same amplitude. An angular phase shift can be provided between the group of sources on a circle and those of another circle. The antenna can be energized by a three-layer printed circuit line. It can be made up by an array of doublets folded into sheets. Inside the cylinder the transmitter is installed to which is applied a signal to be transmitted and which supplies the modulated carrier to the array of radiating sources.
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Cited Art Landscape
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