Resonant Bessel-beam launchers (BBLs)are radiating devices constituted by a cylindrical metallic cavity with a partially reflecting sheet (PRS) on top. Millimeter-wave resonant BBLs typically exhibit transverse magnetic (TM) polarization due to the use of coaxial probes as feeders and homogenized metasurfaces as PRS. Launchers showing either a purely transverse electric (TE) or a hybrid (quasi-TE) polarization have recently been proposed for realizing wireless power transfer (WPT) links in the radiative near-field region at millimeter waves. The former are obtained by means of a radial slot array as a feeder and a homogenized metasurface as a PRS. The latter are obtained by using a loop antenna as a feeder and an annular strip grating in the homogenization limit as radiating aperture. In this work, based on an original semi-analytical model, such a metasurface is demonstrated to show a dichroic behavior. This interpretation explains the improvement in terms of polarization purity with respect to more nondichroic conventional homogenized metasurfaces. The behavior of the annular strip grating under a pure TM polarization is tested with a coaxial feeder, whereas its behavior under a pure TE polarization is tested by means of the radial slot array feeder. Results confirm the validity of the proposed analysis, which is finally exploited to evaluate the WPT performance.

Negri E., Benassi F., Fuscaldo W., Masotti D., Burghignoli P., Costanzo A., et al. (2024). Design of TE-polarized resonant Bessel-beam launchers for wireless power transfer links in the radiative near-field region. INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES, 1, 1-10 [10.1017/S1759078723001538].

Design of TE-polarized resonant Bessel-beam launchers for wireless power transfer links in the radiative near-field region

Benassi F.;Masotti D.;Costanzo A.;
2024

Abstract

Resonant Bessel-beam launchers (BBLs)are radiating devices constituted by a cylindrical metallic cavity with a partially reflecting sheet (PRS) on top. Millimeter-wave resonant BBLs typically exhibit transverse magnetic (TM) polarization due to the use of coaxial probes as feeders and homogenized metasurfaces as PRS. Launchers showing either a purely transverse electric (TE) or a hybrid (quasi-TE) polarization have recently been proposed for realizing wireless power transfer (WPT) links in the radiative near-field region at millimeter waves. The former are obtained by means of a radial slot array as a feeder and a homogenized metasurface as a PRS. The latter are obtained by using a loop antenna as a feeder and an annular strip grating in the homogenization limit as radiating aperture. In this work, based on an original semi-analytical model, such a metasurface is demonstrated to show a dichroic behavior. This interpretation explains the improvement in terms of polarization purity with respect to more nondichroic conventional homogenized metasurfaces. The behavior of the annular strip grating under a pure TM polarization is tested with a coaxial feeder, whereas its behavior under a pure TE polarization is tested by means of the radial slot array feeder. Results confirm the validity of the proposed analysis, which is finally exploited to evaluate the WPT performance.
2024
Negri E., Benassi F., Fuscaldo W., Masotti D., Burghignoli P., Costanzo A., et al. (2024). Design of TE-polarized resonant Bessel-beam launchers for wireless power transfer links in the radiative near-field region. INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES, 1, 1-10 [10.1017/S1759078723001538].
Negri E.; Benassi F.; Fuscaldo W.; Masotti D.; Burghignoli P.; Costanzo A.; Galli A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/972706
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