Plane Wave and Gaussian Beam Scattering by Long Dielectric Cylinders: 2.5D Simulations versus Measurements

摘要

For the development of millimeter wave imaging systems, it is importantto be able to simulate some representative scattering configurations. Typically,Gaussian beams are used in active imaging systems. Since these beams only illu-minate a spatially limited region, many objects can be treated as infinitely long2D (in)homogenous cylinders. However, the incident Gaussian beams have a 3Dcharacter. Therefore, a dedicated 2.5D scattering simulator was developed. In thispaper, simulation results obtained with this simulator are compared to measurementsobtained from a bi-static microwave set-up and from a W-band millimeter waveset-up. Comparison of simulations and measurements proves that the 2.5D al-gorithm is a good simulation tool to study scattering of long inhomogeneouscylinders, illuminated by 3D plane waves or 3D Gaussian beams under differentelevation angles.