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.
Claims7
A high power array element having plurality of inputs, the high power array element comprising:
- a ground plane;
- a plurality of coaxial transmission line feeds disposed through said ground plane;
- a center conductor of each of said plurality of coaxial transmission line feeds arranged on a circle having a predetermined radius wherein the heights of said center conductors above the ground plane and the horizontal separation between said center conductors are selected to match an impedance characteristic at each of the plurality of inputs of the high power array element;
- 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.