In most applications the shape and the pointing direction of the antenna radiation pattern have a direct impact on the performance of the overall system. Therefore, the possibility to shape and rotate the radiation pattern of the radiating element is of interest for a multitude of different scenarios. In this contribution, we show how the radiation properties of patch antennas can be manipulated in a robust way through the phase singularities of vortex fields. In particular, we show that this can be accomplished by properly superimposing to the fundamental mode of a standard patch antenna, circularly polarized higher order modes exhibiting topological singularities.
Barbuto, M., Miri, M.-., Alu, A., Bilotti, F., Toscano, A. (2018). Manipulating the radiation pattern of patch antennas by exploiting phase singularities. In 2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 - Proceedings (pp.491-492). Institute of Electrical and Electronics Engineers Inc. [10.1109/APUSNCURSINRSM.2018.8608791].