Results 11 to 20 of about 1,247,246 (231)

Mutual Interference of Automotive OFDM Radars—Analysis and Countermeasures

open access: yesIEEE Journal of Microwaves, 2021
Due to its noise-like signal property, digital orthogonal frequency-division multiplexing (OFDM) radars are often assumed to be robust against interference.
Benedikt Schweizer   +4 more
doaj   +1 more source

Microwave-Assisted Synthesis and Evaluation of Antimicrobial Activity of 3-{3-(s-Aryl and s-Heteroaromatic)acryloyl}-2Hchromen-2-one Derivatives [PDF]

open access: yes, 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

open access: yesIEEE 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

Efficient enhancements in spectral domain method to speed up open planar circuit analysis [PDF]

open access: yes, 1998
The spectral domain method is a very fast and powerful technique to analyse planar microwave circuits. Available techniques for simulating the excitation of open planar microwave circuits are not very effective at relatively low frequencies.
Balik, HH, Railton, CJ
core   +2 more sources

Bandwidth and Center Frequency Reconfigurable Waveguide Filter Based on Liquid Crystal Technology

open access: yesIEEE 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

Current Developments of Sparse Microwave Imaging

open access: yesLeida 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

An Equivalent-Asymmetric Coupling Coefficient DFB Laser With High Output Efficiency and Stable Single Longitudinal Mode Operation

open access: yesIEEE 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

System Performance of a 79 GHz High-Resolution 4D Imaging MIMO Radar With 1728 Virtual Channels

open access: yesIEEE 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

Variable frequency microwave (VFM) processing facilities and application in processing thermoplastic matrix composites [PDF]

open access: yes, 2003
Microwave processing of materials is a relatively new technology advancement alternative that provides new approaches for enhancing material properties as well as economic advantages through energy savings and accelerated product development.
Ball, J. A. R.   +3 more
core   +1 more source

Tuning the Angular Characteristics of Biomimetic Antenna Arrays

open access: yesIEEE 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

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