Cylindrical omnidirectional antenna

Details Cylindrical omnidirectional antenna Cylindrical omnidirectional antenna

H - Electricity

01

Q

351/58

H01Q 21/20 (2006.01) H01Q 13/08 (2006.01)

Patent

CA 1274015

ABSTRACT An antenna array with circular symmetry made up of an array of cylindrically 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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