The possibility to establish a wireless link in the radiative near field at millimeter waves through Transverse Electric (TE) polarized Bessel beams is here investigated. Previous realizations of TE-polarized Bessel beams at millimeter waves are based on leaky-wave resonant cavities fed with loop antennas. Unfortunately, these feeders also excite undesired, nonnegligible Transverse Magnetic (TM) field components, thus leading to a hybrid TE polarization, rather than a pure TE polarization. In this work, we propose a radial-slot array feeding technique as an effective solution to generate almost pure TE-polarized Bessel beams in leaky-wave resonant cavities. The design is based on an effective leaky-wave approach for the characterization of the launcher. The proposed TE feeding scheme is validated with full-wave results. The study of a complete wireless power transfer scenario shows that the proposed solution significantly improves the link budget compared to previous hybrid TE- and TM-polarization cases.
Effective TE-Polarized Bessel-Beam Excitation for Wireless Power Transfer Near-Field Links / Negri E.; Benassi F.; Fuscaldo W.; Masotti D.; Burghignoli P.; Costanzo A.; Galli A.. - ELETTRONICO. - (2022), pp. 230-233. (Intervento presentato al convegno 52nd European Microwave Conference (EuMC) tenutosi a Milano nel 25-30 Settembre 2022) [10.23919/EuMC54642.2022.9924485].
Effective TE-Polarized Bessel-Beam Excitation for Wireless Power Transfer Near-Field Links
Benassi F.;Masotti D.;Costanzo A.;
2022
Abstract
The possibility to establish a wireless link in the radiative near field at millimeter waves through Transverse Electric (TE) polarized Bessel beams is here investigated. Previous realizations of TE-polarized Bessel beams at millimeter waves are based on leaky-wave resonant cavities fed with loop antennas. Unfortunately, these feeders also excite undesired, nonnegligible Transverse Magnetic (TM) field components, thus leading to a hybrid TE polarization, rather than a pure TE polarization. In this work, we propose a radial-slot array feeding technique as an effective solution to generate almost pure TE-polarized Bessel beams in leaky-wave resonant cavities. The design is based on an effective leaky-wave approach for the characterization of the launcher. The proposed TE feeding scheme is validated with full-wave results. The study of a complete wireless power transfer scenario shows that the proposed solution significantly improves the link budget compared to previous hybrid TE- and TM-polarization cases.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
