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Abstract
Theoretically, a wave field may be represented by different superpositions of both discrete and continuous waves. This leads to the problem of physical actualization (separation, detection) of individual virtual-field components. The present work analyzes some procedures for virtual field actualization: using the results of angular spectrum measurements, applying the extended curvilinear antennas, by means of antennas focused at the virtual field, etc. Typical examples are presented to show that the virtual fields can be separated by means of physical devices: measurements of Huygens' sources with focused antennas and measurements of virtual fields related to wedge geometry and diffraction rays.