Results 141 to 150 of about 1,829,864 (373)

A Reflectarray Antenna Using Hexagonal Lattice With Enhanced Beam Steering Capability

IEEE Access, 2019
This paper presents a novel reflectarray antenna with enhanced beam steering capability. The reflectarray antenna is based on the hexagonal distribution of the unit cells on the antenna surface.
Orcun Kiris, Kagan Topalli, Mehmet Unlu
doaj   +1 more source

Three‐dimensional Antimony Sulfide Based Flat Optics

Advanced Functional Materials, EarlyView.
This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang, Uwe Hübner, Anne Gärtner, Tao Chen, Joseph Köbel, Franka Jahn, Daniel Repp, Abhrodeep Dey, Henrik Schneidwind, Andrea Dellith, Jan Dellith, Torsten Wieduwilt, Matthias Zeisberger, Tanveer Ahmed Shaik, Astrid Bingel, Markus A. Schmidt, Jer‐Shing Huang, Ulf Peschel, Volker Deckert   +18 more
wiley   +1 more source

Wide-angle non-uniform optical phased array using compact and efficient antenna design

Scientific Reports
In the need for a more compact and efficient optical phased array with a wide steering beam for LIDAR applications, a wide steering array with high resolution is desirable.
Omar E. Elsheikh, Mohamed A. Swillam
doaj   +1 more source

SURVEY OF BEAM STEERING TECHNIQUES AVAILABLE FOR MILLIMETER WAVE APPLICATIONS [PDF]

, 2016
Iyemeh E. Uchendu, James R. Kelly
openalex   +1 more source

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

Spacecraft antenna systems Final engineering report, Oct. 1963 - Jan. 1966 [PDF]

Spacecraft communication system with reliable, beam-steering ...
Birgenheier, R. A., Kummer, W. H.
core   +1 more source

A Continuous Beam Steering Slotted Waveguide Antenna Using Rotating Dielectric Slabs

, 2018
The design, simulation and measurement of a beam steerable slotted waveguide antenna operating in X band are presented. The proposed beam steerable antenna consists of a standard rectangular waveguide (RWG) section with longitudinal slots in the broad ...
Ghasemi, Amirhossein, Laurin, Jean-Jacques   +1 more
core   +1 more source

A Novel Circularly Polarized Radial-Line Slot Array Antenna with Beam-Steering Solution

, 2022
Shaofeng Bi, Yunfei Sun, Xiaoyu Cheng, Qiang Zhang, Chengwei Yuan   +4 more
openalex   +1 more source

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

Advanced Functional Materials, EarlyView.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai, Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +6 more
wiley   +1 more source

Primary Beam Steering Due to Field Leakage from Superconducting SHMS Magnets

, 2014
Simulations of the magnetic fields from the Super High Momentum Spectrometer in Hall C at Thomas Jefferson National Accelerator Facility show significant field leakage into the region of the primary beam line between the target and the beam dump. Without
Benesch, Jay, Carlini, Roger, Covrig, Silviu, Moore, Michael H., Waidyawansa, Buddhini P.   +4 more
core   +1 more source