Limited scan phased array antenna
First Claim
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1. A two-dimensional phased array antenna for scanning a narrow beam over a wide angular sector, said antenna comprising:
- a plurality of high directivity elements disposed in a substantially rectangularly array, each of said elements having a high aspect ratio, said elements of said array being arranged in a staggered relationship for suppressing near-in grating lobes.
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Abstract
A phased array antenna is designed for scanning a narrow beam over an angular sector that is wide in one plane, and narrow in another, while using a minimum number of phase steering controls. High directivity elements occupy a rectangularly shaped area which is large in one direction relative to a second direction, the elements being staggered in position with neighboring elements to suppress near-in grating lobes. The elements are independent and identical to one another so that conventional array beamforming techniques may be utilized.
30 Citations
10 Claims
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1. A two-dimensional phased array antenna for scanning a narrow beam over a wide angular sector, said antenna comprising:
a plurality of high directivity elements disposed in a substantially rectangularly array, each of said elements having a high aspect ratio, said elements of said array being arranged in a staggered relationship for suppressing near-in grating lobes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A two-dimensional array antenna comprising a plurality of identical high-directivity elements arranged in a substantially rectangular-shaped array, each of said elements in said array having an aspect ratio which is greater than 4:
- 1, said elements being arranged in a staggered pattern defined by adjacent element columns, wherein adjacent columns of elements are staggered by approximately one half of the major dimension of the element.
- View Dependent Claims (9, 10)
Specification