Results 151 to 160 of about 12,412 (307)

Design of high-performance millimeter wave and sub-millimeter wave quasi-optical isolators and circulators

, 2007
Faraday rotators using permanently magnetized ferrite materials are used to make quasi-optical isolators and circulators at millimeter wave and sub-millimeter wave frequencies that have far higher performance than their waveguide equivalents.
Goy, P, Graham M. Smith, Robertson, Duncan Alexander, Philippe Goy, Duncan A. Robertson, Hunter, Robert Iain, Smith, Graham Murray, Robert I. Hunter   +7 more
core   +1 more source

High-Q enstatite microwave/terahertz dielectric ceramics modulated by phase transition and lattice distortion

Journal of Advanced Ceramics
The rapid development of fifth-/sixth-generation telecommunication technologies has increased the demand for silicate ceramic materials with low permittivity and low dielectric loss. However, few silicate ceramics with ultrahigh Q×f values (≥ 200,000 GHz)
Yutian Lu, Weijia Guo, Chongyang Zhang, Hui Zhang, Zhenxing Yue   +4 more
doaj   +1 more source

A General and Efficient Framework for the Rapid Design of Miniaturized, Wideband, and High‐Bit RIS

Advanced Electronic Materials, EarlyView.
A general and efficient framework is proposed for the rapid design of high‐performance reconfigurable intelligent surfaces (RISs). This framework integrates advanced antenna design techniques and incorporates various load types, quantities, and values to achieve the design of high‐performance RISs.
Jun Wei Zhang, Zheng Xing Wang, Wanwan Cao, Zhen Jie Qi, Li Jie Wu, Han Qing Yang, Qun Yan Zhou, Si Ran Wang, Hui Dong Li, Jun Yan Dai, Jiang Luo, Jun Wei Wu, Jia Nan Zhang, Zhen Zhang, Qiang Cheng   +14 more
wiley   +1 more source

Terahertz technology and applications

, 2008
THz or submillimetre-wave sensing covers the frequency range from 300 GHz to 10 THz (wavelengths from 1 mm to 30 µm). With energy levels in the 1.2-40 meV range, terahertz interactions with matter involve intermolecular, rather than atomic transitions ...
Vukusic, Josip,, Zirath, Herbert,, Siegel, Peter H., Bryllert, Tomas,, Banik, Biddut Kumar,, Emrich, Anders,, Stake, Jan,, Sobis, Peter,, Tang, Aik-Yean,, Rudner, Staffan,, Drakinskiy, Vladimir,, Cherednichenko, Serguei,   +11 more
core  

Iterative Synthesis of Pyrene–Coronene Molecular Graphene Nanoribbons

Angewandte Chemie, EarlyView.
An iterative approach delivers a new family of undoped, cove‐edged graphene nanoribbons with lengths up to 9.1 nm that exhibit both molar absorptivity and fluorescence brightness values on the order of 105 M−1 cm−1 and an intrinsic charge‐carrier mobility of 475 ± 32 cm2 V−1 s−1.
Miguel A. Medel, Guanzhao Wen, Adrián Morón‐Blanco, Mischa Bonn, Hai I. Wang, Manuel Melle‐Franco, Aurelio Mateo‐Alonso   +6 more
wiley   +2 more sources

Terahertz Squint SAR Imaging Based on Decoupled Frequency Scaling Algorithm

Remote Sensing
Terahertz synthetic aperture radar (SAR) can achieve high-resolution imaging of the target area through a large bandwidth, while squint imaging can flexibly detect the target area by adjusting the beam direction.
Yuang Wang, Jun Yi, Yuzheng Zhao, Hongqiang Wang, Bin Deng, Qi Yang   +5 more
doaj   +1 more source

Power enhancement in the terahertz band

, 2012
In the last years, the Terahertz band has achieved great importance due to its multiple applications in different fields. These applications may go from medicine, to defense and security. Additionally, its short wavelength allows to transmit large amount of data in a short period of time. Developing the Terahertz technology could lead to an improvement
openaire   +2 more sources

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source