Zobrazeno 1 - 10
of 596
pro vyhledávání: '"Eibert, Thomas"'
Microwave imaging is commonly based on the solution of linearized inverse scattering problems by matched filtering algorithms, i.e., by applying the adjoint of the forward scattering operator to the observation data. A more rigorous approach is the e
Externí odkaz:
http://arxiv.org/abs/2410.06465
Most methods tackling the phase retrieval problem of magnitude-only antenna measurements suffer from unrealistic sampling requirements, from unfeasible computational complexities, and, most severely, from the lacking reliability of nonlinear and nonc
Externí odkaz:
http://arxiv.org/abs/2109.10864
Publikováno v:
IEEE Transactions on Antennas and Propagation, vol. 69, no. 1, pp. 488-501, Jan. 2021
Phase retrieval problems in antenna measurements arise when a reference phase cannot be provided to all measurement locations. Phase retrieval algorithms require sufficiently many independent measurement samples of the radiated fields to be successfu
Externí odkaz:
http://arxiv.org/abs/2105.09928
Autor:
Kornprobst, Jonas, Mittermaier, Thomas J., Mauermayer, Raimund A. M., Hamberger, Gerhard F., Ehrnsperger, Matthias G., Lehmeyer, Bernhard, Ivrlac, Michel T., Imberg, Ulrik, Eibert, Thomas F., Nossek, Josef A.
Publikováno v:
IEEE Transactions on Antennas and Propagation, vol. 69, no. 2, pp. 769-783, Feb. 2021
Two novel decoupling and matching networks (DMNs) in microstrip technology for three-element uniform circular arrays (UCAs) are investigated and compared to a more conventional DMN approach with simple neutralization lines. The array elements are coa
Externí odkaz:
http://arxiv.org/abs/2105.09333
Publikováno v:
IEEE Transactions on Antennas and Propagation, vol. 66, no. 2, pp. 702-711, Feb. 2018
The concept of self-mixing antenna arrays is presented and analyzed with respect to its beneficial behavior of large gain over a wide angular range. The large gain is attained by an antenna array with large element spacing, where all array element si
Externí odkaz:
http://arxiv.org/abs/2105.08685
Publikováno v:
IEEE Transactions on Antennas and Propagation, vol. 65, no. 8, pp. 4293-4298, Aug. 2017
A novel mm-wave microstrip-fed patch antenna with broad bandwidth and wide angular coverage suitable for integration in planar arrays is designed, analyzed and verified by measurements. The antenna provides a bandwidth of 13.1% between 34.1 GHz and 3
Externí odkaz:
http://arxiv.org/abs/2105.08162
A linear and thus convex phase retrieval algorithm for the application in phaseless near-field far-field transformations is presented. The formulation exploits locally known phase relations among sets of measurement samples, which can in practice be
Externí odkaz:
http://arxiv.org/abs/2011.08980
Autor:
Kornprobst, Jonas, Eibert, Thomas F.
Publikováno v:
IEEE Transactions on Antennas and Propagation, vol. 66, no. 4, pp. 2151-2155, Apr. 2018
A combined source integral equation (CSIE) is constructed on the basis of the electric field integral equation (EFIE) to solve electromagnetic radiation and scattering problems containing perfect electrically conducting bodies. It is discretized with
Externí odkaz:
http://arxiv.org/abs/2010.08797
Autor:
Kornprobst, Jonas, Eibert, Thomas F.
Publikováno v:
IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 12, pp. 2174-2178, Dec. 2018
The combined source integral equation (CSIE) for the electric field on the surface of a perfect electrically conducting scatterer can be discretized very accurately with lowest-order Rao-Wilton-Glisson basis and testing functions if the combined-sour
Externí odkaz:
http://arxiv.org/abs/2010.08757
Autor:
Kornprobst, Jonas, Eibert, Thomas F.
Publikováno v:
IEEE Transactions on Antennas and Propagation, vol. 66, no. 11, pp. 6146-6157, Nov. 2018
A new low-order discretization scheme for the identity operator in the magnetic field integral equation (MFIE) is discussed. Its concept is derived from the weak-form representation of combined sources which are discretized with Rao-Wilton-Glisson (R
Externí odkaz:
http://arxiv.org/abs/2010.08436