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AssigneeHarris Corporation
InventorsRobert C. Hildebrand, Gayle P. Martin
Estimating the term…
The elements of a spatially aperiodic phased array antenna have an unequally spaced circular distribution, that is effective to decorrelate angular and linear separations among elements of the array. For any radial direction passing through an element of the array, the vector distance from any point along that radial direction to any two elements of the array is unequal and uniformly distributed in phase, modulo 2.pi.. Angular separation between successively adjacent antenna elements varies in accordance with an Nth root of two, wherein N is the number of antenna elements in the array. To locate each element, a first element is placed at any arbitrary location along the circumference of the array. The angular spacing .alpha..sub.1 of a second element relative to the first element is defined such that .alpha..sub.1 =2.pi.*(2.sup.1/N -1). The angular spacing .alpha..sub.j of each additional element relative to the first element is defined by .alpha..sub.j =.alpha..sub.j-1 *2.sup.1/N, where j varies from 2 to N. Without spacial correlation among elements of the array, sidelobes are diminished, allowing nulls to be placed upon selected co-channel interferers.
An antenna comprising a plurality of antenna elements arranged along a two-dimensional continuous path having a prescribed regular geometrical shape, and wherein no two pairs of successively adjacent antenna elements have the same mutual separation therebetween.
An antenna, comprising a plurality of antenna elements arranged alone a circular path, and wherein the angular separation between any two successive antenna elements is different from the angular separation between any other two successive antenna elements along said circular path.
An antenna comprising a plurality of antenna elements arranged along a circle having a diameter at least an order of magnitude greater than a wavelength of said antenna elements, said antenna elements having a directivity pattern parallel to a plane containing said circle, and wherein the angular separation along said circle between any two successive antenna elements is different from the angular separation between any other two successive antenna elements.
A circular plurality of antenna elements, in which no two pairs of successively adjacent antenna elements have the same mutual angular separation.
A method of configuring an antenna comprising the steps of:
Dependencies are inferred from the claim text.