In this contribution, we expand the possibility offered by structured fields at microwave frequencies by exploiting phase singularity points of vortex modes for designing a single radiating structure exhibiting orthogonal radiation patterns pointing in different directions. This kind of structure, being able to radiate two orthogonal polarizations with low-coupling levels, can be exploited in compact multi-antenna systems for antenna diversity or MIMO applications.
Barbuto, M., Alu, A., Bilotti, F., Toscano, A. (2020). Exploiting vortex modes in the design of patch antennas for pattern diversity and MIMO systems. In 2020 14th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2020 (pp.93-95). Institute of Electrical and Electronics Engineers Inc. [10.1109/Metamaterials49557.2020.9284992].