UNIQUE PHASE RECONSTRUCTION OF NEAR FIELDS OVER PLANES

The retrieving of the phase of a field radiated by a planar source ove r a plane in near zone is investigated by formulating it as the invers ion of a quadratic operator. To solve the problem, a representation of the near field is adopted which takes into account both the dimension and the location of the source. This makes it possible to derive a ne w uniqueness result which allows one of the main Limitations of previo us methods to be removed. The conditions to be met in order to obtain a completely reliable solution procedure are then briefly illustrated by exploiting the quadraticity of the operator to be inverted. Finally , the iterative solution algorithm is described and examples are shown .