Results 31 to 40 of about 918,997 (290)
Electronic Beam Steering Metamaterial Antenna with Dual-Tuned Mode of Liquid Crystal Material
Sensors, 2023 In this study, a dual-tuned mode of liquid crystal (LC) material was proposed and adopted on reconfigurable metamaterial antennas to expand the fixed-frequency beam-steering range.
Shuang Ma +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
A 4 × 4 Active Antenna Array with Adjustable Beam Steering
Sensors, 2023 An adjustable 4×4 antenna array with electrical beam steering and polarization control is presented. Here, adjustability means the ability to correct the beam steering angle post-calibration.
Sebastian Verho +2 more
doaj +1 more source
Design of Compact Beam-Steering Antennas Using a Metasurface Formed by Uniform Square Rings
IEEE Access, 2018 In this paper, we propose two designs of slot-fed metasurface antenna for beam steering applications. Both designs have the same two-layer stacked configuration consisting of either a single-slot or a double-slot radiator and a metasurface superstrate ...
Tanan Hongnara +3 more
doaj +1 more source
Light recycling beam steering on a DMD lidar
, 2018 Spatial light modulators (SLMs) that operate in a phase modulation mode enable beam steering with higher diffraction efficiency compared to amplitude modulation mode, thus potentially be used for an efficient beam steering with no moving part. Currently,
Rodriguez, Joshua M. +5 more
core +1 more source
Global Efforts to Reduce Paediatric Cancer Care Disparities in Radiotherapy: A Decade Change
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background We present an update on the status, needs and challenges faced by paediatric imaging and radiotherapy (RT) programmes globally after a previous survey conducted by the International Atomic Energy Agency (IAEA) 10 years prior. Methods We developed and distributed a 121‐question survey to radiation oncologists, medical physicists and ...
Raymond B. Mailhot Vega +10 more
wiley +1 more source
Two-Dimensional Dynamic Beam Steering by Tamm Plasmon Polariton
Photonics, 2023 The dynamic steering of a beam reflected from a photonic structure supporting Tamm plasmon polariton is demonstrated. The phase and amplitude of the reflected wave are adjusted by modulating the refractive index of a transparent conductive oxide layer by
Rashid G. Bikbaev +2 more
doaj +1 more source
360° beam-steering reconfigurable wideband substrate integrated waveguide horn antenna
, 2016 A novel beam-steering reconfigurable substrate integrated waveguide (SIW) horn antenna is presented. By employing p-i-n diodes as tuning mechanisms, the states of copper posts of the SIW horn can be electronically controlled.
Ge, Lei, Luk, Kwai Man, Chen, Shichang
core +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Rates of cancer among adolescents and young adults (AYA), age 15–39 years, are increasing. Consequently, radiation oncologists are treating more AYAs who have diagnoses spanning both pediatric and adult practices. Compared to pediatric and older adult patients, AYAs face a unique set of challenges.
Hesham Elhalawani +7 more
wiley +1 more source
A beam steering antenna based on Fresnel zone plate radome
Electronics Letters, 2021 In this study, a beam steering antenna was presented, comprising patch antenna and two layers of Fresnel zone plate (FZP). One of the FZP was a fixed structure, the other was a 1‐D collapsible radome with alternately deployed metal strips covering and ...
Yuting Wu +3 more
doaj +1 more source