A. A. Hassan and J. H. Saadie, “Multilayer Structure Technique for Improving Determination of Electromagnetic Properties of Radar Absorbers Based on Two-Layer Method and Flanged Rectangular Waveguide Probe”, IJEEI, vol. 8, no. 4, pp. 610–625, Dec. 2020, doi: 10.52549/ijeei.v8i4.1444.