Abstract
It is demonstrated theoretically that a Trott nearfield array can be used to measure the farfield-radiation characteristics of a finite source radiating partially coherent noise. Radiated noise signals of finite duration are considered and an integral equation analogous to the Helmholtz-Kirchhoff theorem is used to describe the mutual-coherence function of the noise field. The farfield form of this mutual-coherence function can be determined from measurements made in the nearfield because the Trott array is able to measure the farfield characteristics of a strictly coherent source located within its planewave region.
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