Patent, Filed 19 Aug 85, patented 1 Sep 87,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A wideband antenna with reduced diameter and volume compared to prior art antennas and having noncritical dimensions resulting in ease of manufacture and tolerance to damage in portable applications and during installation. In one embodiment the antenna is comprised of a vertical element, a number of equally spaced, equal length horizontal elements in the form of a disc and a number of equally spaced, equal length round plane elements in the form of a cone. The vertical and horizontal elements are connected to the inner conductor of a coaxial transmission line and the conical elements are connected to the outer conductor transmission line. In a second embodiment of the present invention, the vertical element is deleted and a parallel inductor is connected between the transmission line outer and inner conductors.
- Electrical and Electronic Equipment