360°-Beam-Steering Low-Sidelobe Time Reversal Microwave Power Transfer by Superposition of Multiple Weighted Radiation Modes
Hu, Lin (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes)
Parrón Granados, Josep (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes)
Paco Sánchez, Pedro Antonio de (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes)
Zhao, Deshuang (University of Electronic Science and Technology of China)
Wang, Bing-Zhong (University of Electronic Science and Technology of China)

Data:	2024
Resum:	This letter proposes a 360°-beam-steering low-sidelobe time reversal microwave power transfer (TR-MPT) method. The beam steering is implemented by only one circular patch antenna fabricated with multiple feeding ports. The multiple feeding ports are designed to stimulate different radiation modes and their combinations to steer the beam within 360° in the azimuth plane. To depress the sidelobe levels and enhance the beam gain, a disc-top-loaded monopole antenna is added at the center of the patch antenna, which is used to excite an additional mode out of phase with the maximal sidelobe but in phase with the main lobe. Finally, time reversal (TR) is adopted for optimally weighting the stimulated modes and focusing the power beam adaptively to the desired receiver. A prototype of the TR-MPT system based on the proposed method is established. The experiments demonstrate that the new method can not only adaptively focus the power at the receiver placed at any azimuth angle within 360°, but also achieve a low sidelobe level of smaller than −8. 57 dB under a 0. 7-wavelength aperture. Additionally, the power transferred to the receiver at different angles has a small fluctuation of less than 0. 7 dB.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Microwave power transfer ; Low side lobe ; Beam steering ; Time reversal
Publicat a:	IEEE antennas and wireless propagation letters, Vol. 23, Issue 3 (March 2024) , p. 1134-1138, ISSN 1536-1225

DOI: 10.1109/LAWP.2023.3346878

Disponible a partir de: 2025-03-31 Postprint

El registre apareix a les col·leccions:
Articles > Articles de recerca
Articles > Articles publicats