Results 21 to 30 of about 944,511 (369)
FIVE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE OBSERVATIONS: COSMOLOGICAL INTERPRETATION [PDF]
, 2008 The Wilkinson Microwave Anisotropy Probe (WMAP) 5-year data provide stringent limits on deviations from the minimal, six-parameter Λ cold dark matter model. We report these limits and use them to constrain the physics of cosmic inflation via Gaussianity,
Eiichiro Komatsu +19 more
semanticscholar +1 more source
Advancement of science, 2021 High‐performance microwave absorbers with special features are desired to meet the requirements of more complex modern service environments, especially corrosive environments.
Xuefei Xu +8 more
semanticscholar +1 more source
Heralding entangled optical photons from a microwave quantum processor [PDF]
, 2023 Exploiting the strengths of different quantum hardware components may enhance the capabilities of emerging quantum processors. Here, we propose and analyze a quantum architecture that leverages the non-local connectivity of optics, along with the exquisite quantum control offered by superconducting microwave circuits, to produce entangled optical ...
arxiv +1 more source
Highly Efficient Angular Array Calibration Based on the Modal Wave Expansion Technique
IEEE Open Journal of Antennas and Propagation, 2021 In the upper millimeter wave range above 100 GHz, the effect of array imperfections like manufacturing uncertainties and mutual antenna coupling increases, which leads to deviations from the nominal antenna positions and angle-dependent errors in ...
Andre Durr +3 more
doaj +1 more source
Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology [PDF]
, 2006 A simple cosmological model with only six parameters (matter density, Omega_m h^2, baryon density, Omega_b h^2, Hubble Constant, H_0, amplitude of fluctuations, sigma_8, optical depth, tau, and a slope for the scalar perturbation spectrum, n_s) fits not ...
D. Spergel +21 more
semanticscholar +1 more source
Tuning the Angular Characteristics of Biomimetic Antenna Arrays
IEEE Open Journal of Antennas and Propagation, 2023 The angle estimation capabilities of radar sensors are strictly linked to the antenna spacing between the array elements. A larger array aperture corresponds to a smaller beam width or in terms of the angle estimation a higher phase sensitivity.
Ines Dorsch +3 more
doaj +1 more source
Bandwidth and Center Frequency Reconfigurable Waveguide Filter Based on Liquid Crystal Technology
IEEE Journal of Microwaves, 2022 This paper presents for the first time a fully electronically reconfigurable waveguide filter tunable in bandwidth and center frequency based on liquid crystal (LC) technology.
Fynn Kamrath +10 more
doaj +1 more source
Artificial Neural Networks for Microwave Computer-Aided Design: The State of the Art
IEEE transactions on microwave theory and techniques, 2022 This article presents an overview of artificial neural network (ANN) techniques for a microwave computer-aided design (CAD). ANN-based techniques are becoming useful for performing forward/inverse modeling for active/passive components to enhance a ...
F. Feng +5 more
semanticscholar +1 more source
Flash microwave pressing of zirconia [PDF]
Journal of the American Ceramic Society, Wiley, 2020, 2020 Microwave Pressing is a promising way to reduce microwave sintering temperatures and stabilize microwave powder materials processing. A multi-physics simulation was conducted of the regulated pressure-assisted microwave cavity. This simulation took into consideration resonance phenomena and the nonlinear temperature-dependent material parameters of ...
arxiv +1 more source
Current Developments of Sparse Microwave Imaging
Leida xuebao, 2014 The sparse microwave imaging combines the sparse signal processing theory with radar imaging to obtain new theory, new system, and new methodology of microwave imaging.
Wu Yi-rong +5 more
doaj +1 more source