Compact low RCS ultra-wide bandwidth conical monopole antenna
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsLynn A. Marsan, Edward A. Urbanik
Life of this patent
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Abstract
A low radar cross-section monocone antenna is provided with an ultra-wide bandwidth in the microwave region of the electromagnetic spectrum running from 1 gigahertz to 18 gigahertz by decreasing the low frequency cutoff through enlarging the overall dimensions of the cone while at the same time maintaining the base diameter of the apex of the cone to the initially-set dimension that establishes the high frequency cutoff of the antenna. The apex of this cone that serves as its feed point has a base diameter that results in the wide bandwidth, with the monocone antenna having a 5 dBi gain and omnidirectional coverage.
Claims13
A miniaturized ultra-wide bandwidth omnidirectional low radar cross-section monocone antenna capable of operating between 1 GHz and 18 GHz with a VSWR of less than 2:1, comprising:
- a ground plane;
- and,
- a cone having a solid conical surface spaced from said ground plane, the cone with said ground plane resulting in an omnidirectional antenna pattern above said ground plane, said cone having an apex pointed towards said ground plane, with an apex base size sufficiently small to establish a high-frequency cutoff of at least 18 GHz, the size of said cone being large enough to establish a 1 GHz low-frequency cutoff, the cone antenna being fed at the apex of said cone.
A miniaturized omnidirectional ultra-wide bandwidth low radar cross-section monocone antenna for use in the microwave band, comprising:
- a ground plane;
- and,
- a monocone spaced from said ground plane, said antenna being fed at the apex of said monocone, said apex pointed at said ground plane and having a base size sufficiently small to establish an extended high-frequency cutoff for providing said antenna with an 18:1 frequency ratio, said antenna having a low-frequency cutoff set by the height of the monocone, the height of said monocone being less than ¼″ in height.
Dependencies are inferred from the claim text.