Results 31 to 40 of about 1,896,279 (338)
Optically Controlled Beam-steering Wireless Systems [PDF]
Optical Fiber Communication Conference (OFC) 2020, 2020 Wavelength-controlled 2D steering of mm-wave beams and infrared beams provides high communication capacity, privacy and energy efficiency. Using diffractive elements and accurate user localization, delivery of multiple 10GbE video streams by infrared beams is demonstrated.
Koonen, A.M.J. (Ton) +5 more
openaire +2 more sources
Non-Mechanical Beam Steering with Polarization Gratings: A Review
Crystals, 2021 Polarization gratings (PGs) enable a novel architecture for dynamic non-mechanical steering of light over large angles and with large clear apertures. This beam steering approach has many applications in active sensing and optical communications. In this
Christopher Hoy +5 more
doaj +1 more source
Programmable VO2 metasurface for terahertz wave beam steering
iScience, 2022 Summary Programmable vanadium dioxide (VO2) metasurface is proposed at THz frequencies. The insulating and metallic states of VO2 can be switched via external electrical stimulation, resulting in the dynamical modulation of electromagnetic response.
Daquan Yang +6 more
semanticscholar +1 more source
The impact of a 1.5 T MRI linac fringe field on neighbouring linear accelerators
Physics and Imaging in Radiation Oncology, 2017 Background and purpose: This study investigates the influence of an MRI linac fringe field on neighbouring radiotherapy accelerators and whether restoring their original steering calibration can be used to shorten downtime after changes of the magnetic ...
Thijs Perik +2 more
doaj +1 more source
Experimental Demonstration of >230{\deg} Phase Modulation in Gate-Tunable Graphene-Gold Reconfigurable Mid-Infrared Metasurfaces [PDF]
, 2017 Metasurfaces offer significant potential to control far-field light propagation through the engineering of amplitude, polarization, and phase at an interface. We report here phase modulation of an electronically reconfigurable metasurface and demonstrate
Atwater, Harry A. +7 more
core +4 more sources
All-Solid-State Beam Steering via Integrated Optical Phased Array Technology
Micromachines, 2022 Light detection and ranging (LiDAR), combining traditional radar technology with modern laser technology, has much potential for applications in navigation, mapping, and so on.
Shi Zhao, Jingye Chen, Yaocheng Shi
semanticscholar +1 more source
Self-steering partially coherent beams
Scientific Reports, 2017 AbstractWe introduce a class of shape-invariant partially coherent beams with a moving guiding center which we term self-steering partially coherent beams. The guiding center of each such beam evolves along a straight line trajectory which can be engineered to make any angle with the x-axis.
Yahong Chen +2 more
openaire +2 more sources
Crystals, 2022 A novel beam steering angle expander is demonstrated by cascading two polymeric liquid crystal polarization lenses with different diopters. The lens module performs as a planar telescope, which has features such as a light weight, low cost, and high ...
Yannanqi Li, Zhenyi Luo, Shin-Tson Wu
doaj +1 more source
The Design of a Sliding Rectangular Waveguide Array Antenna for Beam Steering [PDF]
Journal of Electromagnetic Engineering and Science, 2023 In this paper, we designed a sliding waveguide array antenna that can be beam-steered via mechanical manipulation. This reduces the vulnerability of electronic beam-steering radars mounted on ships or aircraft to electromagnetic pulse (EMP) attacks.
Yoon-Seon Choi +3 more
doaj +1 more source
IEEE Transactions on Antennas and Propagation, 2021 Accurate knowledge of initial complex excitation coefficients for phased-array elements is essential to ensure accurate array performance. In the literature, many array calibration algorithms have been proposed for this purpose, which generally requires ...
Zhengpeng Wang +5 more
semanticscholar +1 more source