Results 31 to 40 of about 2,894,233 (286)
Optical Phased Array Light Shaping [PDF]
, 2022 An apparatus comprises: a photonic integrated circuit comprising an optical phased array, a first focusing element at a fixed position relative to the optical phased array and configured to couple an optical beam to or from the optical phased array, and ...
Watts, Michael Robert, Shtyrkova, Katia
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An Efficient Method for Performance Monitoring of Active Phased Array Antennas [PDF]
, 2009 Modern synthetic aperture radars (SARs) are equipped with active phased array antennas to electronically generate various antenna beams. The TerraSAR-X satellite is a high resolution SAR system launched in June 2007.
Schwerdt, Marco +2 more
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Photonic wideband phased array: an optical time steered antenna based on a new true time delay unit [PDF]
, 2006 L’attività di ricerca svolta durante il corso di dottorato e descritta dettagliatamente all’interno della tesi è stata diretta al progetto di una innovativa rete ottica di formazione del fascio per antenne a schiera a banda larga esenti dal fenomeno del ...
Curcio, Claudio
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Applied Sciences, 2023 By introducing the arrayed waveguide router (AWGR) optical true time-delay (OTTD) architecture in bent-pipe satellite optical inter-link to optically assist the RF phased array in Low-earth orbit satellites will extend the multi-hop bent-pipe satellite ...
Shiyi Xia +7 more
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Design of a Low-Crosstalk Sub-Wavelength-Pitch Silicon Waveguide Array for Optical Phased Array
IEEE Photonics Journal, 2021 In this work, a compact sub-wavelength-pitch silicon waveguide array with low crosstalk is proposed and analyzed. The crosstalk is suppressed by periodic silicon nano-blocks symmetrically arranged along the silicon strip waveguides.
Guangzhu Zhou +3 more
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Optimal E-Field Vector Combination for a Highly Focused Antenna-Array [PDF]
, 2014 A near-field highly focused circular phased-array antenna for 5.8-GHz radio frequency identification (RFID) applications is presented. The electric field (E-field) at the focus is enhanced by a constructive vector combination in a three-dimensional (3-D)
Perallos, Asier +5 more
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First Demonstration of Dynamic High-Gain Beam Steering With a Scanning Lens Phased Array
IEEE Journal of Microwaves, 2022 We report on the first demonstration of dynamic beam steering using a scanning lens phased array. A scanning lens phased array relies on a combination of mechanical and electrical phase shifting to dynamically steer a high-gain beam beyond the grating ...
Sjoerd Bosma +4 more
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The Warm Receiver Section and the Digital Backend of the PHAROS2 Phased Array Feed [PDF]
, 2019 We describe the development of a multi-channel “warm receiver section” (WS) and of a digital beamformer for the PHAROS2 Phased Array Feed (PAF), a PAF demonstrator for radio astronomy application across the 4-8 GHz radio frequency (RF) band.
PUPILLO, Giuseppe +29 more
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FSO Receiver With Adaptive Alignment Based on Pure Phased Holographic Imaging
Frontiers in Physics, 2021 This paper proposes a free space optical communication (FSO) receivier system with adaptive alignment based on pure phase holographic imaging. During the frame header transmission period, the optical phased array in this system performs specific ...
Haibo Wang, Zaichen Zhang, Yidi Zhang
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In-Flight Performance Monitoring of TerraSAR-X Active Phased Array Antenna [PDF]
, 2009 TerraSAR-X is a high resolution synthetic aperture radar (SAR) satellite launched in 2007. Its active phased array X-Band antenna hosts 384 transmit/receive modules (TRMs) controlling the beam shape and steering in azimuth and elevation.
Markus Bachmann +5 more
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