Dual-frequency receiving array using randomized element positions
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United States of America Patent
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Dec 1, 1992
Issued Date -
N/A
app pub date -
Nov 13, 1991
filing date -
Nov 13, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An array for receiving wave energy at a pair of widely spaced frequencies has receiving elements arranged to function as a half-wave array for the lower frequency and as a random array for the higher frequency. A plurality of receiving elements are arranged in an array with the receiving elements having nominal positions spaced apart such that spacing between adjacent nominal positions is approximately one half the wavelength .lambda. of the wave having the lower frequency. The receiving elements are randomly distributed about their respective nominal positions with each receiving element being within a distance of .epsilon..lambda..sub.o of its corresponding nominal position where .epsilon. is a randomization parameter and .lambda..sub.o is the wavelength of the higher frequency wave.
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