Holographic imaging of electromagnetic field vector flow

The conventional method of making radio wave propagation and electromagnetic compatibility measurements in space uses direct observation at representative points in the observation space. However, direct observation has drawbacks. Solving the resulting problems involves a great deal of work because the existence of wave interference means there is no unique relationship between observation results and the observation space, and the relationship between the wave source distribution in space and the observed results is unknown. The paper discusses the three-dimensional energy flow of the electromagnetic waves using radio holography and the radiation sources polarimetry. The radio holography method proposed provides a highly sensitive recording of radio waves propagating in free space in terms of polarization and other wave information. The method includes numerical reconstruction, resynthesis of polarized waves, and two-frequency differential phases.