NEAR-FIELD ANALYSIS OF SPHERICAL LOOP ARRAYS

In a recent paper [1], the authors presented the development of an alg orithm for the reconstruction of element currents of a spherical loop array given the far-field pattern data in an azimuthal plane, and demo nstrated the validity of the method with several computational example s. In this letter, it is shown that the same algorithm can be applied to the reconstruction of the spherical loop-array currents from the ne arfield data by application of spherical wave expansion of the electri c field integral of the array. The main feature of the reconstruction algorithm is that the array currents are obtained recursively through the solution of a triangular equation set.