Huygens metasurfaces (HMS) are usually made of unit-cells composed of a cascaded configuration of impedance sheets returning a specific phase insertion for a fixed frequency. Here, we discuss the design of self-reconfigurable HMS exhibiting two different phase-gradients depending not only on the frequency of the impinging field but also on its temporal waveform. We show that the reconfigurability of the cells can be obtained by modifying the impedance sheet of just one layer, greatly simplifying the complexity of the fabrication process. As a case study, the HMS is designed to coat a conventional dipole antenna and introduce beamforming functionalities in the presence of a signal characterized by a very short pulse width, whilst the original omnidirectional pattern of the antenna is exhibited for a continuous waveform.
Vellucci, S., Monti, A., Barbuto, M., Fathnan, A.A., Karamirad, M., Longhi, M., et al. (2024). Waveform-selective Huygens metasurfaces for antenna applications. In IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) (pp.1033-1034). 345 E 47TH ST, NEW YORK, NY 10017 USA : Institute of Electrical and Electronics Engineers Inc. [10.1109/ap-s/inc-usnc-ursi52054.2024.10685973].
Waveform-selective Huygens metasurfaces for antenna applications
Monti, A.;Barbuto, M.;Karamirad, M.;Longhi, M.;Ramaccia, D.;Stefanini, L.;Toscano, A.;Bilotti, F.
2024-01-01
Abstract
Huygens metasurfaces (HMS) are usually made of unit-cells composed of a cascaded configuration of impedance sheets returning a specific phase insertion for a fixed frequency. Here, we discuss the design of self-reconfigurable HMS exhibiting two different phase-gradients depending not only on the frequency of the impinging field but also on its temporal waveform. We show that the reconfigurability of the cells can be obtained by modifying the impedance sheet of just one layer, greatly simplifying the complexity of the fabrication process. As a case study, the HMS is designed to coat a conventional dipole antenna and introduce beamforming functionalities in the presence of a signal characterized by a very short pulse width, whilst the original omnidirectional pattern of the antenna is exhibited for a continuous waveform.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
