Multiple Input Loop Antenna
AssigneeRaytheon Company
InventorsDavid D. Crouch, Keith G. Kato
Life of this patent
Estimating the term…
Abstract
A multiple input loop antenna comprising one or more half-loop antennas disposed above a ground plane wherein the plane of each half loop is perpendicular to the ground plane such that the multiple input loop antenna is a three-dimensional structure and electromagnetic waves are radiated from points within the volume occupied by the antenna rather than from a two-dimensional surface. For this reason, the multiple input loop antenna can radiate levels of peak power without inducing excessive air breakdown which are relatively high compared with peak power levels of conventional antennas having comparable transverse dimensions. Also described is an array antenna comprised of an array of multiple input loop antennas.
Claims30
A multiple input loop antenna comprising:
- a ground plane;
- and
- one or more half-loop antennas disposed above said ground plane wherein the plane of each half loop is perpendicular to said ground plane, each of said one or more half-loop antennas having a first and second input ports.
The multiple input loop antenna comprising:
- N half-loop antennas disposed above said ground plane wherein the plane of each of said N half-loop antennas is perpendicular to said ground plane and wherein each of said N half-loop antennas have a first and second input ports to provide the multiple input loop antenna having 2N inputs.
A four-input antenna comprising:
- a ground plane;
- and
- a pair of half-loops disposed over said ground plane wherein the plane of each half-loop is perpendicular to said ground plane such that the pair of loops are adapted to combine the outputs from four separate RF sources and are adapted to radiate at least one of linear or circular polarization, depending upon the relative phases of the signals driving each of the half-loops.
An array antenna comprising:
- a plurality of multiple input loop antennas, each of said multiple input loop antennas comprising:
- a ground plane;
- and
- one or more half-loop antennas disposed above said ground plane wherein the plane of each half loop is perpendicular to said ground plane.
A high power array element comprises:
- a ground plane;
- a plurality of coaxial transmission line feeds disposed through said ground plane;
- with a center conductor of each of said plurality of coaxial transmission line feeds arranged on a circle having a predetermined radius
- a like plurality of pill-shaped caps, each of said plurality of pill-shaped caps disposed over a center conductors of a respective one of said coaxial transmission line feeds, each of said caps having a size and shape selected to reduce a peak electric field on a surface of the high power array element.
Dependencies are inferred from the claim text.