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EnglishThe combined field integral equation (CFIE) used for solving scattering and radiation problems, although a resonance-free formulation, suffers from an ill-conditioning that strongly depends on the frequency and discretization density, both in the low- and high-frequency regime, resulting in slow convergence rates for iterative solvers. This work presents a new preconditioning scheme for the CFIE that cures the low-and the high-frequency as well as the dense discretization breakdown. The new preconditioner for the CFIE is based on a spherical harmonics analysis and the proper regularization with Helmholtz-type operators. Numerical results have been obtained to prove the effectiveness of this new formulation in real scenarios.
On the Spectral Behavior and Normalization of a Resonance-Free and High-Frequency Stable Integral Equation / CHHIM, TIFFANY; Adrian, Simon B.; Andriulli, Francesco P.. - ELETTRONICO. - (2018), pp. 2447-2448. ((Intervento presentato al convegno IEEE Antennas and Propagation Society International Symposium [10.1109/APUSNCURSINRSM.2018.8608769].
| Titolo: | On the Spectral Behavior and Normalization of a Resonance-Free and High-Frequency Stable Integral Equation | |
| Autori: | ||
| Data di pubblicazione: | 2018 | |
| Abstract: | The combined field integral equation (CFIE) used for solving scattering and radiation problems, a...lthough a resonance-free formulation, suffers from an ill-conditioning that strongly depends on the frequency and discretization density, both in the low- and high-frequency regime, resulting in slow convergence rates for iterative solvers. This work presents a new preconditioning scheme for the CFIE that cures the low-and the high-frequency as well as the dense discretization breakdown. The new preconditioner for the CFIE is based on a spherical harmonics analysis and the proper regularization with Helmholtz-type operators. Numerical results have been obtained to prove the effectiveness of this new formulation in real scenarios. | |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| 08608769.pdf | Conference contribution | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
| APS_2018_Tiffany_CHHIM_Regular.pdf | Conference Contribution | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
http://hdl.handle.net/11583/2733432
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