Omnidirectional cylindrical antenna

Details Omnidirectional cylindrical antenna Omnidirectional cylindrical antenna

1988-07-13

1990-02-06

Hille, Rolf

Communications: radio wave antennas

Antennas

Microstrip

343803, 343853, 343DIG2, H01Q 2120

Patent

active

048991627

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.

REFERENCES:
patent: 3713166 (1973-01-01), Munson et al.
patent: 3747114 (1973-07-01), Shyhalla
patent: 3813674 (1974-05-01), Sidford
patent: 4054874 (1977-10-01), Oltman
patent: 4079268 (1978-03-01), Fletcher et al.
patent: 4162499 (1979-07-01), Jones et al.
patent: 4528568 (1985-07-01), Woloszczuk
patent: 4605932 (1986-08-01), Butscher et al.

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