Results 31 to 40 of about 918,925 (290)
Photonics, 2022 We demonstrate two-dimensional beam steering through wavelength control using a one-dimensional optical phased array (OPA) in which a path difference is built up in each channel to allocate a phase delay sequentially.
Hyeonho Yoon +6 more
doaj +1 more source
Review on fixed-frequency beam steering for leaky wave antenna [PDF]
, 2019 This paper aims to survey the efforts of researchers in response to the novel and effective technology of control radiation pattern at a fixed frequency for leaky wave antenna (LWA), map the research landscape from the literature onto coherent taxonomy ...
Zakaria, Z.; Universiti Teknikal Malaysia Melaka (UTeM) +4 more
core +1 more source
Measured and simulated performance of a ceramic micromechanical beam steering device at 94 GHz [PDF]
, 2008 We report the first experimental demonstration of a transmission-mode micromechanical beam steering device for use in standoff terahertz imaging and spectroscopy.
Drysdale, T.D. +5 more
core +1 more source
Non-mechanical beam steering: ways and means [PDF]
, 2018 One of the very useful aspects of a laser is its well-defined beam, delivering high intensity to a defined location. Directing that beam and specifying the location is generally done with adjustable mirrors. Directing the beam in time varying manner most
Benton, David
core +1 more source
Smart Gateway for Healthcare Networks Based on Beam Steering Technology
Sensors, 2023 To ensure high-reliability communication in healthcare networks, this paper presents a smart gateway system that includes an angle-of-arrival (AOA) estimation and a beam steering function for a small circular antenna array.
Kazuhiro Honda +2 more
doaj +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
Beam steering of a single nanoantenna
Optics Express, 2020 Nanoantennas play an important role as mediators to efficiently convert free-space light into localized optical energy and vice versa. However, effective control of the beam direction of a single nanoantenna remains a great challenge. In this paper, we propose an approach to steer the beam direction of a single nanoantenna by adjusting two antenna ...
Hwi-Min Kim, Myung-Ki Kim
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
Two-Dimensional Beam Steering Based on Compact Programmable Coding Metasurface
Applied Sciences, 2022 A programmable coding metasurface provides unprecedented flexibility to manipulate electromagnetic waves dynamically. By controlling the peculiarity of subwavelength artificial atoms, devices with metasurfaces perform various functionalities.
Fei Yang +6 more
doaj +1 more source