Results 31 to 40 of about 1,738,073 (376)
Microwave-Assisted Synthesis and Evaluation of Antimicrobial Activity of 3-{3-(s-Aryl and s-Heteroaromatic)acryloyl}-2Hchromen-2-one Derivatives [PDF]
, 2010 The exploration of potential utilization of microwaves as an energy source for heterocyclic synthesis was herein investigated using condensation of 3-acetylcoumarin (1) with aromatic and heteroaromatic aldehydes to afford the corresponding aromatic ...
Ajani +47 more
core +1 more source
Angle-Dependent Synthesis Method for Holographic Multi-Feed Antennas
IEEE Open Journal of Antennas and Propagation, 2023 A novel synthesis method for holographic multi-feed antennas is presented to combine all sub-holograms into an angle-dependent shared holographic aperture.
Thomas Frey +4 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
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
Microwave Lens for Polar Molecules [PDF]
, 2010 We here report on the implementation of a microwave lens for neutral polar molecules suitable to focus molecules both in low-field-seeking and in high-field-seeking states.
Gerard Meijer +7 more
core +2 more sources
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
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
IEEE Photonics Journal, 2014 An equivalent-asymmetric coupling coefficient (EACC) distributed feedback laser (DFB) semiconductor laser with equivalent-half apodization grating (EHAG) structure is proposed and experimentally demonstrated for the first time; the EHAG profile is ...
Junshou Zheng +7 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
System Performance of a 79 GHz High-Resolution 4D Imaging MIMO Radar With 1728 Virtual Channels
IEEE Journal of Microwaves, 2022 Future driver assistance and autonomous driving systems require high-resolution 4D imaging radars that provide detailed and robust information about the vehicle's surroundings, even in poor weather or lighting conditions.
Dominik Schwarz +3 more
doaj +1 more source