Results 31 to 40 of about 799,648 (306)
A low profile radiating element with nearly hemispheric coverage for satellite communications on-the-move hybrid array antenna [PDF]
, 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 +7 more
core +1 more source
Frontiers in Earth ScienceIntroductionThis study investigates the precipitation characteristics of tropical cyclones (TCs) making landfall in East China from 1960 to 2010.MethodsStatistical and factor analysis methodologies were employed, leveraging TC precipitation separation ...
Longbin Ye +4 more
doaj +1 more source
Circuits and Systems for Wireless Concurrent Communication [PDF]
, 2009 Concurrency is a special kind of analog circuit parallelism that uses a single circuit with necessary bandwidth to process multiple signals at the same time. Concurrent radios offer a higher data rate and improved system diversity.
Wang, Yu-Jiu
core +1 more source
Design and Optimization of Broadband Matching Networks for Widely Steerable Phased Array Radar Systems [PDF]
, 2022 The use of phased arrays have become prevalent in radar systems for military and weather applications due to their planar configuration and ability of electronic steering.
O'Connor-Lynch, Patrick
core
Focusing Modeling of OPFC Linear Array Transducer by Using Distributed Point Source Method
Abstract and Applied Analysis, 2014 The improvement of ultrasonic phased array detection technology is a major concern of engineering community. Orthotropic piezoelectric fiber composite (OPFC) can be constructed to multielement linear array which may be applied conveniently to actuators ...
Ziping Wang, Ying Luo
doaj +1 more source
Digital Predistortion Utilizing Over-the-Air Feedback for Phased Arrays
IEEE Access, 2021 In this paper, an efficient digital predistortion (DPD) architecture utilizing over-the-air (OTA) feedback is presented to linearize phased array transmitters.
Ying Liu +5 more
doaj +1 more source
Geometric Phase in Phasing of Antenna Arrays [PDF]
Symposium - International Astronomical Union, 2002 The response of a pair of differently polarized antennas is determined by their polarization states and a phase between them which has a geometric part which becomes discontinuous at singular points in the parameter space. Some consequences are described.
openaire +2 more sources
TECHNIQUES AND INSTRUMENTATION FOR PHASED ARRAY CALIBRATION [PDF]
, 2020 Active phased arrays suffer the inherent problem of excitation errors, i.e., incorrect phase and amplitude excitation of the antenna elements. Excitation errors degrade critical performance parameters since they increase sidelobe level and reduce antenna
Lebron Garcia, Rodrigo
core
Multi-Antenna Phased Array Radar-Guided Search Resource Optimization Algorithm Based on MADDPG [PDF]
Jisuanji gongchengAn optimization algorithm for multi-antenna phased array radar search parameters based on the Multi-Agent Deep Deterministic Policy Gradient (MADDPG) is proposed to address the problem that search parameters of the traditional single-antenna phased array
WANG Teng, HUANG Junsong, WANG Leting, ZHANG Caikun, LI Xiaoyang
doaj +1 more source
The microbiome in human skin aging
FEBS Letters, EarlyView.Age‐related skin changes encompass the well‐known visible phenotypic alterations, together with microbiome dysbiosis and a series of molecular aging hallmarks. These hallmarks characterize not only a fully stablished aged phenotype but also the skin aging process itself.
Manuel Huerta Arana +3 more
wiley +1 more source