Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Ole Neitz"'
The inverse equivalent source problem related to near-field antenna measurements is typically ill-posed, i.e., the forward operator suffers from non-trivial null spaces. This issue is commonly tackled by pursuing a least-squares solution of the recon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6a7021283e1e6b18a12c2480afa3601
https://doi.org/10.36227/techrxiv.20126231
https://doi.org/10.36227/techrxiv.20126231
Publikováno v:
IEEE Transactions on Antennas and Propagation. 67:7597-7610
A thorough picture is presented on the capability of compressed sensing to reduce the number of measurement samples that are required for a near-field to far-field transformation (NFFFT), based on the spherical vector wave expansion of the radiated f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a94f097f60abcf52a46f44b54e749b3
https://doi.org/10.1109/tap.2019.2935102
https://doi.org/10.1109/tap.2019.2935102
Autor:
Christian Hunscher, Ole Neitz, Torsten Fritzel, Thomas F. Eibert, Josef Migl, Hans-Jurgen Steiner, Alexander Geise
Publikováno v:
IEEE Transactions on Antennas and Propagation. 67:3346-3357
A portable near-field (NF) antenna measurement system for frequencies up to Ka -band is presented and evaluated in detail. The system follows the idea to collect measurement samples on arbitrary scan surfaces in the NF, where strong irregularities of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92a8015fdc7c248d976ec50cd6e1de54
https://doi.org/10.1109/tap.2019.2900373
https://doi.org/10.1109/tap.2019.2900373
Publikováno v:
IEEE Transactions on Antennas and Propagation. 67:3387-3396
A fully polarimetric plane-wave field synthesis-based approach is presented to accurately determine the 3-D monostatic radar cross section (RCS) of an object under test from a set of bistatic near-field (NF) measurements. It allows the use of small s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da99ac86ed5197f9c05253cdde9fb0fe
https://doi.org/10.1109/tap.2019.2900421
https://doi.org/10.1109/tap.2019.2900421
Publikováno v:
Progress In Electromagnetics Research. 165:47-65
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9db37297df7b251159599c88cc0499e4
https://doi.org/10.2528/pier19050904
https://doi.org/10.2528/pier19050904
Autor:
Josef Knapp, Ole Neitz, Thomas F. Eibert, Raimund A. M. Mauermayer, Alexander Paulus, Jonas Kornprobst
The conditioning and accuracy of various inverse surface-source formulations are investigated. First, the normal systems of equations are discussed. Second, different implementations of the zero-field condition are analyzed regarding their effect on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba666219234b490291062f6cdd36715f
Autor:
Raimund A. M. Mauermayer, Christian Koenen, Christoph J. Eisner, Gerhard F. Hamberger, Ole Neitz, Thomas F. Eibert, Uwe Siart
Publikováno v:
IEEE Transactions on Antennas and Propagation. 66:5498-5510
A volumetric $W$ -band near-field (NF) antenna measurement system is presented and evaluated. The system supports measurements at arbitrary locations within the measurement volume with high positioning accuracy together with corresponding field trans
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3523d8ecbe4840c2d330342f0a8a1f0a
https://doi.org/10.1109/tap.2018.2854173
https://doi.org/10.1109/tap.2018.2854173
Publikováno v:
IEEE Transactions on Antennas and Propagation. 65:4230-4238
In order to accurately determine the far-field gain of an antenna under test from near-field measurements, a general transmission equation between the ports of a transmitting and a receiving antenna is derived. The formulation is based on a propagati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58b8425fa084081b7dc976b9c1ce42d6
https://doi.org/10.1109/tap.2017.2712180
https://doi.org/10.1109/tap.2017.2712180
Publikováno v:
2019 International Conference on Electromagnetics in Advanced Applications (ICEAA).
For near-field antenna measurements, the most versatile post-processing techniques are inverse equivalent surface source solvers, since they are able to provide suppression of parasitic echo influences by source localization and offer diagnostic info
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8700fa27583b19570e77661f439e26ba
https://doi.org/10.1109/iceaa.2019.8879105
https://doi.org/10.1109/iceaa.2019.8879105
Publikováno v:
2019 International Conference on Electromagnetics in Advanced Applications (ICEAA).
Standard radar imaging methods work commonly with time-domain or spectral domain back-propagation techniques, which are restricted in terms of flexibility and spatial resolution. In this work, we investigate inverse source methods with respect to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be6faacfcf5fb1e550a645a8c43d86f7
https://doi.org/10.1109/iceaa.2019.8879050
https://doi.org/10.1109/iceaa.2019.8879050