Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Anders Bernland"'
Publikováno v:
International Journal of Microwave and Wireless Technologies. 13:602-613
This paper describes a small unmanned aerial vehicle (UAV)-based synthetic aperture radar (SAR) system using low-cost radar (5–6 GHz), position (GNSS/RTK) and attitude (IMU) sensors for the generation of high-resolution images. Measurements using s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d7438d6bf8d35a470ffeba6e4050da4
https://doi.org/10.1017/s1759078721000416
https://doi.org/10.1017/s1759078721000416
Publikováno v:
SIAM Journal on Scientific Computing. 41:B181-B204
A compression driver is an electro-acoustic transducer with considerably higher efficiency than direct radiating loudspeakers, thanks to the increased radiation resistance caused by a large vibrati ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e81bf92a54ef19b1a620c2d819693901
https://doi.org/10.1137/18m1175768
https://doi.org/10.1137/18m1175768
Publikováno v:
2020 17th European Radar Conference (EuRAD).
This paper describes a small UAV-based SAR using low-cost 5–6 GHz radar, GNSS/RTK and IMU sensors for generation of high-resolution images. Measurements using straight as well as highly curved flight trajectories show range and cross-range lobe wid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64a7a99de0d2ace2278aa1ed254fbde1
https://doi.org/10.1109/eurad48048.2021.00055
https://doi.org/10.1109/eurad48048.2021.00055
Publikováno v:
International Journal for Numerical Methods in Engineering. 113:432-449
Fictitious domain methods are attractive for shape optimization applications, since they do not require deformed or regenerated meshes. A recently developed such method is the CutFEM approach, whic ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50932dcf79f4efa77f2a34e8dcbf43a9
https://doi.org/10.1002/nme.5621
https://doi.org/10.1002/nme.5621
Publikováno v:
The Journal of the Acoustical Society of America. 148:2604-2604
The compression driver, used to feed midrange horns, consists of a compression chamber whose outlets are connected to the horn throat through a phase plug. The main challenge in the design of the phase plug is to avoid resonance and interference phen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66f304356fda04832b58c6c47fd74ed7
https://doi.org/10.1121/1.5147234
https://doi.org/10.1121/1.5147234
The linearized, compressible Navier-Stokes equations can be used to model acoustic wave propagation in the presence of viscous and thermal boundary layers. However, acoustic boundary layers are notorious for invoking prohibitively high resolution req
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69e35178172d8ed32781b712e54404f9
http://arxiv.org/abs/1801.04177
http://arxiv.org/abs/1801.04177
Autor:
Anders Bernland
Publikováno v:
IEEE Transactions on Antennas and Propagation. 60:4345-4353
Various physical limitations in electromagnetic theory and antenna theory have received considerable attention recently. However, there are no previous limitations on the scattering of higher order electromagnetic vector spherical waves, despite the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba6d9697a7a85ca6b12ccaa54798e88b
https://doi.org/10.1109/tap.2012.2207071
https://doi.org/10.1109/tap.2012.2207071
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 11:608-611
Electromagnetic vector spherical waves have been used recently to model antenna-channel interaction and the available degrees of freedom in multiple-input-multiple-output (MIMO) systems. However, there are no previous accounts of a method to estimate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::998e712e7a08bcc23adfe6c45de34b33
https://doi.org/10.1109/lawp.2012.2202870
https://doi.org/10.1109/lawp.2012.2202870
Publikováno v:
IEEE Transactions on Antennas and Propagation. 59:3358-3369
Using an exact circuit analogy for the scattering of vector spherical waves, it is shown how the problem of determining the optimal scattering bounds for a homogeneous sphere in its high-contrast limit is identical to the closely related, and yet ver
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5406c896e428887d4cbe49f5bb9aa1c
https://doi.org/10.1109/tap.2011.2161451
https://doi.org/10.1109/tap.2011.2161451
Publikováno v:
The Journal of the Acoustical Society of America. 144:1792-1792
For devices such as hearing aids, microphones, micro loudspeakers, and compression drivers, thermal and viscous boundary layer effects are often highly noticeable. These effects can be modeled in the linear regime by the linearized, compressible Navi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9417e678561e81fde70869948e9acee4
https://doi.org/10.1121/1.5067910
https://doi.org/10.1121/1.5067910