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2,454 results on '"Qiu, Lei"'

44. Geochronologic Constraints on the Rubidium Deposit of Guiren Peak, Guangdong, China

Author

Zhou, Su, Qiu, Ruizhao, Xie, Bingjing, Qiu, Lei, Liu, Cui, Lin, Dan, Pisello, Anna Laura, Editorial Board Member, Hawkes, Dean, Editorial Board Member, Bougdah, Hocine, Editorial Board Member, Rosso, Federica, Editorial Board Member, Abdalla, Hassan, Editorial Board Member, Boemi, Sofia-Natalia, Editorial Board Member, Mohareb, Nabil, Editorial Board Member, Mesbah Elkaffas, Saleh, Editorial Board Member, Bozonnet, Emmanuel, Editorial Board Member, Pignatta, Gloria, Editorial Board Member, Mahgoub, Yasser, Editorial Board Member, De Bonis, Luciano, Editorial Board Member, Kostopoulou, Stella, Editorial Board Member, Pradhan, Biswajeet, Editorial Board Member, Abdul Mannan, Md., Editorial Board Member, Alalouch, Chaham, Editorial Board Member, Gawad, Iman O., Editorial Board Member, Nayyar, Anand, Editorial Board Member, Amer, Mourad, Series Editor, Çiner, Attila, editor, Banerjee, Santanu, editor, Lucci, Federico, editor, Radwan, Ahmed E., editor, Shah, Afroz Ahmad, editor, Doronzo, Domenico M., editor, Hamimi, Zakaria, editor, and Bauer, Wilfried, editor

Published
2023
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49. Wideband metasurface-loaded rectenna for azimuth-insensitive electromagnetic energy absorption using characteristic mode analysis.

Author

Deng, Lianwen, He, Zhe-Jia, Huang, Shengxiang, Qiu, Lei-Lei, and Zhu, Lei

Subjects
ELECTROMAGNETIC waves, WIRELESS power transmission, ENERGY consumption, ENERGY harvesting, ANTENNAS (Electronics)
Abstract

In this paper, a wideband metasurface-loaded (MTS-L) rectenna system is proposed to capture electromagnetic (EM) energy at arbitrary azimuth angles. The radiation patterns of different modes in the original MTS configuration are analyzed using the characteristic mode theory, and potential modes with omnidirectional radiation are screened out. By the arrangement of patches, the roundness performance of the radiation pattern can be ameliorated, and the omnidirectional characteristic is obtained over a wide frequency band. Subsequently, the surface current density of the selected mode is carefully and artificially designed to facilitate probe excitation as well as refrain from introducing complex power-combining networks. A wideband rectifier circuit is designed as the load of the proposed antenna. Eventually, measured results show that it operates from 4.6 to 9.6 GHz with a fractional bandwidth of 70.4%, and the peak system efficiency is 52.2%. The proposed system demonstrates excellent potential for wireless power transmission and EM energy harvesting in indoor environments. [ABSTRACT FROM AUTHOR]

Published
2024
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