Results 51 to 60 of about 11,248 (224)
Graphene-enabled electrically switchable radar-absorbing surfaces [PDF]
, 2015 Radar-absorbing materials are used in stealth technologies for concealment of an object from radar detection. Resistive and/or magnetic composite materials are used to reduce the backscattered microwave signals. Inability to control electrical properties
Balci O. +3 more
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Security information factor based airborne radar RF stealth
Journal of Systems Engineering and Electronics, 2015 Radar radio frequency (RF) stealth is very important in electronic war (EW), and waveform design and selection. Existing evaluation rules of radar RF stealth include too many parameters of radar and interceptors, such as Schleher interception factor, which makes it difficult to evaluate radar RF stealth technologies if interceptor parameters are ...
Fei Wang +3 more
openaire +1 more source
Broadband Achromatic Programmable Electromagnetic Camouflage via Fluidic‐Accessible Metasurface
Advanced Science, EarlyView.A fluidic access metasurface enables dynamic, broadband electromagnetic illusions. By physically reconstructing conductive patterns with liquid metal, the metasurface achieves real‐time, pixel‐level control over phase dispersion. This allows for the programmable generation of arbitrary strong scattering point arrays, effectively deceiving high ...
Shipeng Liu +14 more
wiley +1 more source
RCS and stealth performance analyses of marine low-altitude helicopter
Hangkong gongcheng jinzhanThe study of radar target characteristics and stealth performance of low altitude helicopters at sea can provide a basis for path planning. a random rough sea surface model is established in this paper.
LIANG Chengliang +3 more
doaj +1 more source
Simulation and Analysis of the Fully Polarimetric Scattering Characteristics of Aircraft in UHF Band
Leida xuebao, 2016 This study is based on the application requirements of fully polarimetric radar for aircraft detection and target recognition. We focus on fully polarimetric scattering characteristics of air targets, particularly the cross-polarimetric scattering ...
Lu Dongwei +3 more
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Take Off to Superiority: The Evolution & Impact of U.S. Aircraft in War [PDF]
, 2019 Military aviation has become a staple in the way wars are fought, and ultimately, won. This research paper takes a look at the ways that aviation has evolved and impacted wars across the U.S. history timeline.
Weidner, Lane
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Carbon Energy, EarlyView.The 0D/1D grain boundary coupling between Fe₃O₄ quantum dots and CNTs induces extreme charge redistribution and short‐range magnetic resonance, enabling complete electromagnetic wave absorption across the entire X and Ku bands. ABSTRACT Ferrite–carbon composites effectively absorb electromagnetic (EM) waves via coupled mechanisms.
Jie Huang +9 more
wiley +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Vapor phase infiltration (VPI) enables atomic‐level dielectric regulation in conductive polymer foams. The VPI‐treated foam exhibits enhanced absorption efficiency per unit thickness (~2.6 times), dynamic frequency tunability (94.5% coverage in 2–18 GHz), and on/off switching ability while retaining performance under acid/alkali exposure and repeated ...
Pengpeng Mou +6 more
wiley +1 more source
The ISCIP Analyst, Volume IV, Issue 5 [PDF]
, 1999 This repository item contains a single issue of The ISCIP Analyst, an analytical review journal published from 1996 to 2010 by the Boston University Institute for the Study of Conflict, Ideology, and ...
Cavan, Susan +8 more
core +3 more sources
Analysis of Competition in the Defense Industrial Base: An F/A-22 Case Study [PDF]
, 2007 Consolidation of the defense industrial base has led to concerns about whether enough competition exists between remaining firms to maintain needed cost reduction and innovation. We examine competition in the U.S. defense industrial base by performing an
Driessnack, John, King, David R.
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