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1 – 1 of 1Markus Johansson, Lovisa E. Nord, Rudolf Kopecký, Andreas Fhager and Mikael Persson
The purpose of this study is to develop and compare two methods of determining the total field, including phase information, when only field amplitudes have been measured on a set…
Abstract
Purpose
The purpose of this study is to develop and compare two methods of determining the total field, including phase information, when only field amplitudes have been measured on a set of planes in the near field of a complex electromagnetic source.
Design/methodology/approach
The first method is a gradient‐based optimization algorithm, based on the adjoint fields. The second method employs an optimization algorithm based on the phase angle gradients of a functional.
Findings
The first method, the adjoint field method, is functioning well for a 2D test case. The second method, the phase angle gradient method, gives very good results for 3D test cases.
Research limitations/implications
The next step is to test the methods with results from real measurement data.
Practical implications
The developed methods are intended for use in dosimetry studies and other applications, where the field distribution from electromagnetic sources are needed.
Originality/value
The methods extend previously made constant phase approximations. The present methods are useful in situations where the electromagnetic source is hard to model.
Details