Results 11 to 20 of about 440,766 (317)

Microwaves in Chemistry [PDF]

open access: yesIEEE Journal of Microwaves, 2021
The unique properties of microwaves make them useful in many diverse applications across a wide range of fields, spanning much of engineering and science. In the chemical sciences, microwaves provide a toolkit of electric and magnetic effects with which, at high power, unconventional heating modes can be used to produce new materials not obtainable by ...
Daniel R. Slocombe, Adrian Porch
openaire   +3 more sources

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

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

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

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

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

Highly Efficient Angular Array Calibration Based on the Modal Wave Expansion Technique

open access: yesIEEE 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

Acrylic denture base repair (Part II): St-rength of acrylic denture base cured by four different techniques [PDF]

open access: yesAl-Rafidain Dental Journal, 2006
Aim: To investigate the effect of repair techniques, surface treatment, and repair space design (3 mm space and no repair space) on the transverse, and tensile strengths of repaired denture base. Materials and methods: Four hundred and sixteen samples of
Repair acrylic denture base, microwave, thermo press.   +1 more
doaj   +1 more source

Through-the-Wall Image Reconstruction via Reweighted Total Variation and Prior Information in Radio Tomographic Imaging

open access: yesIEEE Access, 2020
This paper focuses on the application of radio tomographic imaging in through-the-wall image reconstruction. By using the simple wireless communication devices, e.g., Wi-Fi cards, the whole building layout can be reconstructed with only the received ...
Qichang Guo   +4 more
doaj   +1 more source

Dispersive Fourier Transformation for Versatile Microwave Photonics Applications [PDF]

open access: yes, 2014
: Dispersive Fourier transformation (DFT) maps the broadband spectrum of an ultrashort optical pulse into a time stretched waveform with its intensity profile mirroring the spectrum using chromatic dispersion.
Wang, Chao, Chao Wang
core   +1 more source

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