Results 41 to 50 of about 7,827 (312)

Spatial channel characterization for smart antenna solutions in FDD wireless networks [PDF]

, 2004
This paper introduces a novel metric for determining the spatial decorrelation between the up- and down-link wireless bearers in frequency division duplex (FDD) networks.
M. Beach, Beach, Mark, Allen, Ben, Allen, BH, Karlsson, P, Beach, M, B. Allen, P. Karlsson, Beach, MA, Allen, B, Karlsson, Peter   +10 more
core   +1 more source

A Compact Hemispherical Beam-Coverage Phased Array Antenna Unit for 5G mm-Wave Applications

IEEE Access, 2020
A compact low-profile phased array antenna unit with unidirectional hemispherical beam-coverage for 5G mm-wave applications is proposed in this paper.
Jihoon Bang, Jaehoon Choi
doaj   +1 more source

In-Flight Performance Monitoring of TerraSAR-X Active Phased Array Antenna

, 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, Benjamin Brautigam, Bachmann, Markus, Schwerdt, Marco, Bräutigam, Benjamin, Marco Schwerdt   +5 more
core   +1 more source

Phased array antennas in MIMO receiver

Journal of Telecommunications and Information Technology, 2006
In this paper, a computer simulation of a MIMO system comprising phased array antennas (PAA) in all receiving branches is presented. In order to examine the system performance under relatively realistic conditions, a ray-tracing simulator was applied to generate a baseband channel impulse response matrix H.
Sebastian Kozłowski, Yevhen Yashchyshyn, Józef Modelski   +2 more
openaire   +2 more sources

Ku-Band Dual Linear-Polarized 1-D Beam Steering Antenna Using Parabolic-Cylindrical Reflector Fed by a Phased Array Antenna

IEEE Open Journal of Antennas and Propagation, 2020
We propose a 1D beam steering high gain hybrid reflector-phased array antenna system for enhanced data rate wireless communication at Ku-band (12 - 14 GHz). The proposed hybrid antenna system consists of a D = 50 cm offset parabolic-cylindrical reflector
Ghanshyam Mishra, Satish Kumar Sharma, Jia-Chi Samuel Chieh, Randall B. Olsen   +3 more
doaj   +1 more source

Coherently Radiating Periodic Structures for Feeding Concentric Rings Array with Reduced Number of Phase Shifters

Sensors, 2022
This paper presents the application of CORPS (coherently radiating periodic structures) for feeding CRA (concentric rings array) with a reduced number of phase shifters.
Brian Sanchez, Marco A. Panduro, David H. Covarrubias, Alberto Reyna, Elizvan Juárez   +4 more
doaj   +1 more source

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende, Emilien Petit, Young Woo Park, Sophie Tezenas du Montcel, James M. Joers, Jonathan M. DuBois, H. Moore Arnold, Michal Povazan, Ipek Özdemir, Guita Banan, Romain Valabregue, Philipp Ehses, Jennifer Faber, Chiadi U. Onyike, Peter B. Barker, Jeremy D. Schmahmann, Eva‐Maria Ratai, Sub H. Subramony, Thomas H. Mareci, Khalaf O. Bushara, Henry Paulson, Thomas Klockgether, Alexandra Durr, Tetsuo Ashizawa, Christophe Lenglet, Gülin Öz, READISCA Investigators   +26 more
wiley   +1 more source

Pattern Compensation for Faulty Phased Array Antenna Based on Deep-Learning Technique

IEEE Open Journal of Antennas and Propagation
This study proposes an approach to compensate for pattern distortion in a phased array antenna caused by antenna element failures. The proposed approach utilizes a deep-learning network explicitly trained for a phased array antenna with damaged elements ...
Shu-Min Tsai, Ming-Tien Wu, Yu-Han Chen, Hong-Wei Yan, Ming-Lin Chuang   +4 more
doaj   +1 more source

Variable Stiffness Flexure Structures Enabled by Phase‐Change Gallium and Adhesive Interfacial Locking for Soft Robotic Applications

Advanced Engineering Materials, EarlyView.
A flexure‐based variable stiffness structure is developed by integrating phase‐change modulation and adhesive interfacial locking of gallium. The design enables a wide stiffness variability, transitioning from soft, flexible behavior to rigid, load‐supporting performance.
Sungjin Kim, Sohee John Yoon, Yong‐Lae Park   +2 more
wiley   +1 more source

A low profile radiating element with nearly hemispheric coverage for satellite communications on-the-move hybrid array antenna

, 2010
A novel design solution of a dual-linearly polarised Ku-band low-profile radiating element for low elevation angle coverage (down to 10° above horizon) is presented. Such an element is suitable for full-duplex Satellite Communications On-The-Move (SCOTM)
Yuanyuan Jiang, Alistair Sambell, Foti, Steve, Smith, Dave, Stephen J Foti, Sambell, Alistair, Jiang, Yuanyuan, David Smith   +7 more
core   +1 more source