Results 41 to 50 of about 1,896,279 (338)
Beam Steering with Segmented Annular Arrays [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2006 Two-dimensional (2-D) arrays of squared matrix have maximum periodicity in their main directions; consequently, they require half wavelength (lambda/2), interelement spacing to avoid grating lobes. This condition gives rise to well-known problems derived from the huge number of array elements and from their small size.
Ullate, Luis G. +3 more
openaire +3 more sources
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
Beam steering by χ^(2) trapping
Optics Letters, 1995 We show numerically the mutual dragging and locking together of intense fundamental and second-harmonic light beams propagating in second-order nonlinear media, and we discuss the potential applications of such effects for the steering of beams by spatial phase modulation of the input signals.
Torner Sabata, Lluís +3 more
openaire +4 more sources
A geophone subarray beam-steering process [PDF]
Exploration Geophysics, 1984 The outputs of geophone array elements are conventionally summed into a single output trace. This summation attenuates incoherent noise, horizontally propagating surface waves, and obliquely incident events. The geophone subarray beam‐steering process is a plane‐wave stacking technique which removes the differential moveout and improves the resolution
Dale E. Biswell +2 more
openaire +1 more source
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
Electronics, 2022 This paper highlights recent developments and challenges on beam steering characteristics of reconfigurable transmitarray antennas. It introduces the operating principle of beam forming/beam steering high gain transmitarray antennas to enable the user to
Qasim Ali +6 more
semanticscholar +1 more source
Breakdown of anomalous channeling with ion energy for accurate strain determination in gan-based heterostructures [PDF]
, 2009 The influence of the beam energy on the determination of strain state with ion channeling in GaN-based heterostructures (HSs) is addressed. Experimental results show that anomalous channeling may hinder an accurate analysis due to the steering effects at
A. Redondo-Cubero +12 more
core +8 more sources
iScience, 2022 Summary This article investigates the unexplored potentials of vortices or orbital angular momentum (OAM) beams using the low-cost and high-gain dielectric reflectarray antennas (RAs) at the terahertz (THz) band.
Ali Ali +3 more
semanticscholar +1 more source
Design Aspects of a Broadband Beam-Reconfigurable Leaky-Wave Antenna [PDF]
, 2016 Design aspects of a novel beam-reconfigurable pla-nar series-fed array are addressed to achieve beam steering with frequency tunability over a relatively broad bandwidth.
Abdo-Sánchez, Elena +5 more
core +1 more source
Demonstration of all-optical beam steering in modulated photonic lattices
, 2005 We demonstrate experimentally all-optical beam steering in modulated photonic lattices induced optically by three beam interference in a biased photorefractive crystal. We identify and characterize the key physical parameters governing the beam steering,
Andrey A. Sukhorukov +15 more
core +1 more source