Compact modeling of UWB antenna radiation pattern in TTW context

This paper describes a linear combinationof Spherical Vector Wave Expansion (SVWE) and Singularity expansion methods (SEM) to compress the radiation patternof ultrawideband antennas and its application to Through-The-Wall (TTW) measurements. This process is applied and compared between simulated and experimental data in free space and in TTW context. This work, based on 3D near-field measurements, can provide a compact and precise model of UWB antenna radiation patternthat can be useful for microwave imagingalgorithms.