A Numerical Study on Tomographic Imaging Using Guided Electromagnetic Waves

Guided electromagnetic waves (GEW) have many interesting properties for structural health monitoring of technical structures. In this work, we study the tomographic imaging capabilities of GEW for a metallic plate using a sparse and distributed sensor array. Therefore, we have developed a 2-dimensional numerical model in CST Microwave Studio with flat bottom holes at different spatial locations. The resulting simulated data have been processed for tomographic damage imaging. In addition, we included a description of the signals in the pristine and damaged structure as well as an analysis of the signal difference coefficient (SDC).