Combination directional/omnidirectional antenna
AssigneeAndrew Corporation
InventorsMano D. Judd, David B. Webb, Jonathon C. Veihl
Life of this patent
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Abstract
A combined directional beam and omnidirectional antenna comprises a unitary structure having a plurality of antennas being configured and oriented to achieve both directional beam coverage and omnidirectional beam coverage.
Claims50
An antenna system comprising a unitary structure having a plurality of antennas including an antenna with a plurality of individual antenna elements which collectively define a beam for directional beam coverage and a dipole antenna configured to provide omnidirectional beam coverage, the dipole antenna forming a ground plane for said individual antenna elements.
An antenna system comprising a unitary structure having a plurality of antennas, said antennas being configured to provide both directional beam coverage and omnidirectional beam coverage, wherein at least one of said antennas comprises a bi-conical reflector element.
An antenna structure having a plurality of antenna elements and configured and oriented to achieve both relatively narrow directional beam coverage and relatively wide omnidirectional beam coverage and including a relatively narrow coverage directional beam antenna having a ground plane, said ground plane being configured to serve as a relatively wide coverage omnidirectional antenna.
An antenna structure comprising concentric inner and outer cylindrical antennas, the outer antenna including an array of antenna elements which collectively operate together, the inner cylindrical antenna acting as a ground plane for the antenna elements of the outer cylindrical antenna.
An antenna structure comprising:
- inner and outer antennas which define a central space therein;
- antenna electronics located in said central space.
An antenna structure comprising coaxial cylindrical inner and outer antennas adapted to be excited directly and non-antenna coaxial cylindrical cap structures axially positioned at opposing ends of the inner antenna the cylindrical cap structures being capacitively coupled to the inner antenna to create a capacitive loading on said inner antenna.
A method of sending and receiving radio frequency signals comprising, with a unitary structure having a plurality of antennas, utilizing an antenna with a plurality of individual antenna elements to collectively provide directional beam coverage and an antenna to provide omnidirectional beam coverage, the omnidirectional antenna defining a ground plane for the directional antenna.
A method of sending and receiving radio frequency signals comprising exciting an element including a pair of frusto-conical reflector portions for providing directional beam coverage and omnidirectional beam coverage.
Dependencies are inferred from the claim text.