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Microwave Imaging of Electromagnetic Wave Absorbers in an Antenna Measurement Chamber
  • Quanfeng Wang,
  • Thomas F Eibert
Quanfeng Wang
Department of Electrical Engineering, School of Computation, Information and Technology, Technical University of Munich

Corresponding Author:[email protected]

Author Profile
Thomas F Eibert
Department of Electrical Engineering, School of Computation, Information and Technology, Technical University of Munich

Abstract

The quality of antenna and radar cross section measurement chambers is strongly dependent on the absorption behavior of the installed wave absorbers. It is demonstrated that the behavior of the absorbers can be assessed and illustrated with excellent spatial resolution by powerful microwave imaging techniques. When the absorbers are subjected to an illumination source, the fast irregular antenna field transformation algorithm (FIAFTA) enables simultaneous reconstruction of equivalent sources for both the illuminating source and the scatterers from near-field measurements. This process effectively implements echo suppression, allowing for the isolation of weakly scattered fields, primarily caused by the wave absorbers. Building upon this foundation, the application of microwave imaging technology enables the visual representation and examination of the absorbers. Experimental measurement results are shown to validate the feasibility of the approach.
22 May 2024Submitted to TechRxiv
30 May 2024Published in TechRxiv