Bessel-Gauss beams (BGBs) have been widely investigated in optics in the paraxial approximation, under the frame of a scalar wave theory. Such approximations no longer hold in the microwave/millimeter-wave range, where the vectorial nature of electromagnetic fields cannot be neglected, and experimental realizations of BGBs are still lacking. In this work, we discuss the generation of BGBs through a fully vectorial electromagnetic approach. The field derivation and the numerical evaluation of a BGB are first illustrated. A possible scheme for realizing such solutions is outlined, thus paving the way for the first experimental realization of BGBs at microwave frequencies.
12 Jan 2021
2020 50th European Microwave Conference (EuMC)