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US 4,071,848 AGranted
Thinned aperiodic antenna arrays with improved peak sidelobe level control
AssigneeBell Telephone Laboratories, Incorporated
InventorDavid Garth Leeper
Life of this patent
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Abstract
The present invention relates to thinned linear, planar and three-dimensional phased antenna array configurations which have the antenna or sensor elements positioned in a pseudorandom manner as prescribed by the equation based on difference sets. The present antenna array permit thinning factors well below one-half while retaining the sidelobe level characteristics of arrays with much higher thinning factors.
Claims7
A thinned aperiodic antenna array with improved peak sidelobe level control comprising:
- a plurality of antenna elements disposed in a linear array at locations having spacings which are both integer multiples of a predetermined distance and members of a set of integers D = {d.sub.1, d.sub.2, . . . , d.sub.k }, said set of integers D being determined in accordance with the equation for difference sets as given by
- d.sub.i - d.sub.j = .alpha. (modulo v),
- where v is an integer and is greater than k and for an integer 0<.alpha.<(v-1) said equation has exactly .LAMBDA. solution pairs in said set of integers D and .LAMBDA. is an integer and is less than k.
Dependencies are inferred from the claim text.