Some relations of the spatial spectrum of target on the Ewald sphere with its far andnear field scattering data on a measurement surface are discussed with the aid of the equiva-lent source concept.

• 本文通过目标等效源概念,讨论远场与近场条件下测量面上散射场与目标Fourier域中Ewald球面上空间谱值之间关系。