Study of OAM waves reflection on different types of surfaces or objects at 2.45 GHz

Application of OAM waves in radiofrequency bands presents very interesting perspectives in communication and radar domains [1] [2]. These applications are based on the orthogonality property between the different topological charges of the received wave. In free space, this property can be conserved along the propagation path, but in a real environment, multipath effects can degrade the orthogonality between OAM modes, in particular due to the reflection on surfaces (ground, buildings …) or objects, and the interference between waves.