Principles of Active Radiometry are presented. Noise radiators are used to generate the low-coherence microwave
noise field, and radiometers to evaluate its intensity, polarization and coherence. Several types of noise radiators
are described as well as radiometers and antennas.
The following applications are introduced: Material evaluation where insertion loss and reflectivity of grainy,
irregular and moving objects are preferable. Microwave Coherence Tomography allowing the depth irregularity to
be detected in low-loss objects. Near-Field antenna testing, field coherence evaluation, and spatial combining of