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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Modeling Tree Foliage for Microwave Radar Transparency Study
The motivation for this report is to discuss and present some realistic tree models employed in computational electromagnetics (EM) simulations to study foliage penetration (FOPEN) at Ku-band. The detail obtained in these trees is unprecedented in FOPEN modeling since many studies in this area focus on lower frequencies where precise tree parameters are not required due to the associated large wavelengths relative to the tree dimensions. The focus of this study is in the Ku-band range where the wavelength is notably smaller and the details of the trees have more of an influence on EM waves (i.e. scattering, attenuating, reflecting, diffracting etc.). Therefore, explicit tree parameters are modeled. Also, moderate foliage is of most interest because with less dense foliage t here is a higher percentage of Ku-band transmission. The EM wave and foliage interaction s are simulated with the computational electromagnetics (CEM) Altair FEKO software. The realistic tree model s implemented for simulations are created in the computer-aided design (CAD) software Arbaro and the module CADFEKO that is offered in FEKO. Details of these tree models are provided, and EM simulation results will be discussed in a follow-on report
Development of NbTiN films for superconducting microwave resonators.
Abstract not provided.
Constraints on the Epoch of Reionization from the Cosmic Microwave Background using the CROC suite of simulations
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Detection of Combustion Intermediates via Broadband Chirped-Pulse Microwave Spectroscopy.
Abstract not provided.
Extending the Frequency of Piezoelectric Resonators to Microwave Frequencies and Beyond.
Abstract not provided.
Liquid Crystalline Behavior and Photoluminescence of Lanthanide Decanoate Nanoparticles Synthesized by Microwave Radiation.
Abstract not provided.
Narrowband microwave-photonic notch filtering using Brillouin interactions in silicon.
Abstract not provided.
Response of Integrated Silicon Microwave pin Diodes to X-ray and Fast-Neutron Irradiation.
Abstract not provided.
Microwave Dissolution for Post-Det Screening [Slides]
Abstract not provided.
High-efficiency microwave-optical transduction for quantum sensing and computing
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Microwave Range Relative Permittivity Measurements using a Rectangular Waveguide for Axion Dark Matter Search
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Microwave Response in a Topological Superconducting Quantum Interference Device.
Abstract not provided.
Microwave Response in a Topological Superconducting Quantum Interference Device.
Abstract not provided.
Microwave Synthesis of FeF2@C Composites as Conversion Cathodes for Li Metal Batteries.
Abstract not provided.
The Role of Stoichiometry in Mn1-xZnxFe2O4 Ferrite Microwave Absorbers.
Abstract not provided.
Material study and system design for microwave-optical quantum transduction
Transducers mediate microwave/optical frequencies, providingan interface between superconducting quantum systems andoptical fiber communication networks.