Zobrazeno 1 - 10
of 2 199
pro vyhledávání: '"polarization conversion"'
Autor:
Jing Qin, Olayan Albalawi
Publikováno v:
Alexandria Engineering Journal, Vol 101, Iss , Pp 8-15 (2024)
We demonstrate the design of a highly directive circularly polarized planar reflectarray in this paper, with efficient polarization conversion from the linearly polarized excitation to the circularly polarized radiations based on a novel Jerusalem li
Externí odkaz:
https://doaj.org/article/691db8873eb94f21ba2c8db24fc31749
Publikováno v:
Nanophotonics, Vol 13, Iss 13, Pp 2349-2359 (2024)
Terahertz (THz) waves have been widely hailed as a key enabling technology for future sixth generation (6G) wireless networks. Dynamic modulation of their polarization states is of great attraction for high-capacity communications and anisotropic sen
Externí odkaz:
https://doaj.org/article/c351661aea8b41c99402eb0b5362c755
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 4, Pp 1061-1076 (2024)
This paper presents a novel approach for linear to circular polarization (LP-CP) conversion in transmitarray antennas. The proposed conversion mechanism differs significantly from previous published realizations. The concept utilizes a transmission l
Externí odkaz:
https://doaj.org/article/5ed81fd27f2e4d79a2a8b6db4eb7ba2a
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 1, Pp 190-200 (2024)
This paper presents a novel wideband low-profile linear-to-circular polarizer based on high refractive-index metamaterials in the X band. The proposed design is a multilayer structure that is built from two kinds of metamaterial unit cells consisting
Externí odkaz:
https://doaj.org/article/a159b20d680543538a85301b0bdab6e3
Publikováno v:
IEEE Access, Vol 12, Pp 11664-11673 (2024)
In this paper, a switchable multi-functional wideband metasurface device based on vanadium dioxide (VO2) in the terahertz (THz) region is numerically proposed. By controlling the phase of VO2, the functions of the proposed structure can be reversibly
Externí odkaz:
https://doaj.org/article/ba78708621b342c2a9627c3ae99f1405
Autor:
Abdullah Al Mahfazur Rahman, Mohammad Tariqul Islam, Md. Moniruzzaman, Haitham Alsaif, Abdulwadoud A. Maash, Md. Mhedi Hasan, Mohamed S. Soliman
Publikováno v:
International Journal of Optomechatronics, Vol 18, Iss 1 (2024)
This paper introduces a perfect metamaterial absorber (MMA) achieving exceptional electromagnetic signal absorption at application-oriented frequencies of 2.40 and 3.50 GHz in addition to 6.09 GHz. The MMA exhibits absorption rates of 99.85, 98.6, an
Externí odkaz:
https://doaj.org/article/f03dc211e24549a3b9b98b8a71a927a9
Publikováno v:
Materials & Design, Vol 242, Iss , Pp 113004- (2024)
Due to their inherent defects, circular polarization discrimination methods involving amplitude-phase or axial ratio are obstacles of the computer software-based optimal design of broadband linear-to-circular (LTC) polarization conversion metasurface
Externí odkaz:
https://doaj.org/article/2f45610e396241579da3625e23782f41
Publikováno v:
Frontiers of Optoelectronics, Vol 16, Iss 1, Pp 1-9 (2023)
Abstract Polarization, a fundamental behavior of electromagnetic waves, holds immense potential across diverse domains such as environmental monitoring, biomedicine, and ocean exploration. However, achieving efficient modulation of terahertz waves wi
Externí odkaz:
https://doaj.org/article/8953c67f48be42979acc60a7424651e1
Publikováno v:
Sensors, Vol 24, Iss 15, p 5044 (2024)
A graphene-based tunable polarization conversion metasurface (PCM) was designed and analyzed for the purpose of reducing the radar cross-section (RCS) of array antennas. The metasurface comprises periodic shuttle-shaped metal patches, square-patterne
Externí odkaz:
https://doaj.org/article/4843353616184c22982907d0815eceb9
Autor:
Wei Zou, Changqing Zhong, Lujun Hong, Jiangtao Lei, Yun Shen, Xiaohua Deng, Jing Chen, Tianjing Guo
Publikováno v:
Micromachines, Vol 15, Iss 8, p 967 (2024)
Based on the unique insulator-metal phase transition property of vanadium dioxide (VO2), we propose an integrated metasurface with a switchable mechanism between ultra-broadband absorption and polarization conversion, operating in the terahertz (THz)
Externí odkaz:
https://doaj.org/article/ef578a074f8e4659b3dc8ea1b538d063