Results 51 to 60 of about 353,976 (345)
Secure Satellite Communication Systems Design with Individual Secrecy Rate Constraints
, 2011 In this paper, we study multibeam satellite secure communication through physical (PHY) layer security techniques, i.e., joint power control and beamforming.
Han, Zhu +3 more
core +1 more source
Advanced Materials Technologies, EarlyView.Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu +8 more
wiley +1 more source
Deep reflector prime focus feed for space communication
The Journal of Engineering, 2021 In this paper, design of a prime‐focus feed for a deep reflector, Earth–Moon–Earth space communication system is described. The feed is based on a circular waveguide equipped with two chokes in order to minimise sidelobes and illuminate the deep dish ...
Rastislav Galuscak +4 more
doaj +1 more source
Chemically Doped Conductive Polymers for Wearable Health Monitoring
Advanced Materials Technologies, EarlyView.Among conductive polymers, poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), polyaniline (PANI), and polypyrrole (PPy) are the most studied and applied. Chemical doping significantly boosts intrinsic conductivity and mechanical robustness.
Mengdi Zuo +5 more
wiley +1 more source
Stand for measuring the directional characteristics of antennas of satellite communication systems
Космические аппараты и технологии, 2020 The development of network based on satellite communication systems is a promising solution for providing telecommunications services in the Arctic.
A. B. Gladyshev +4 more
doaj +1 more source
Communication satellite systems for Alaska [PDF]
Technical and cost factors for implementation of Alaskan communication satellite ...
Gubin, S., Lavanhar, H., Whalen, A.
core +1 more source
Topography‐Regulated Screening Platform for Myoblast Contact Guidance
Advanced Materials Technologies, EarlyView.This study develops a topography‐regulated screening platform (12 gradients in 96‐topography‐well plate) enabling analysis of skeletal muscle morphogenesis. The topography‐induced cell morphology changed, cell polarization, and myotube differentiation, establishing an evaluative framework for generating pathologically relevant myotube phenotypes to ...
Tianqi Feng +6 more
wiley +1 more source
International communications satellite systems [PDF]
Ten satellite systems for international communication are briefly described.
Wu, William W.
core +1 more source
Advanced Materials Technologies, EarlyView.One‐dimensional C4N2H14PbBr4 is shown to have a quasi‐direct electronic band structure and strongly anisotropic transport with polarized broadband emission. A GW/Bethe–Salpeter excited‐state force formalism, supported by polarized Raman and temperature‐dependent photoluminescence, identifies low–frequency Pb–Br phonons that drive ultrafast exciton self‐
Rijan Karkee +7 more
wiley +1 more source
Reliability Analysis of Spaceborne Electronic Components under Extreme Space Environments
Space: Science & TechnologyThe application of 6G communication systems across multiple sectors requires advanced satellite communication networks to meet the demands for high-speed transmission, low latency, and secure connectivity. The reliability of radio frequency (RF) modules,
Jianzhong Ding +3 more
doaj +1 more source