Maximum Radiation Efficiency of Arbitrarily-Shaped Implantable Antennas
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2023
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866910326835904512 |
|---|---|
| author | Liska, Jakub Gao, Mingxiang Jelinek, Lukas Algarp, Erik R. Skrivervik, Anja K. Capek, Miloslav |
| author_facet | Liska, Jakub Gao, Mingxiang Jelinek, Lukas Algarp, Erik R. Skrivervik, Anja K. Capek, Miloslav |
| contents | Performance limitations for implanted antennas, taking radiation efficiency as the metric, are presented. The performance limitations use a convex optimization procedure with the current density inside the implant acting as its degree of freedom. The knowledge of the limitations provides useful information in design procedure and physical insight. Ohmic losses in the antenna and surrounding tissue are both considered and quantitatively compared. The interaction of all parts of the system is taken into account in a full-wave manner via the hybrid computation method. The optimization framework is thoroughly tested on a realistic implanted antenna design that is treated both experimentally and as a model in a commercial electromagnetic solver. Good agreement is reported. To demonstrate the feasibility of developed performance limitations, they are compared to the performance of a loop and a dipole antenna showing the importance of various loss mechanisms during the design process. The trade-off between tissue loss and antenna ohmic loss indicates critical points at which the optimal solution drastically changes and the chosen topology for a specific design should be changed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_16466 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Maximum Radiation Efficiency of Arbitrarily-Shaped Implantable Antennas Liska, Jakub Gao, Mingxiang Jelinek, Lukas Algarp, Erik R. Skrivervik, Anja K. Capek, Miloslav Medical Physics Applied Physics Biological Physics Computational Physics Performance limitations for implanted antennas, taking radiation efficiency as the metric, are presented. The performance limitations use a convex optimization procedure with the current density inside the implant acting as its degree of freedom. The knowledge of the limitations provides useful information in design procedure and physical insight. Ohmic losses in the antenna and surrounding tissue are both considered and quantitatively compared. The interaction of all parts of the system is taken into account in a full-wave manner via the hybrid computation method. The optimization framework is thoroughly tested on a realistic implanted antenna design that is treated both experimentally and as a model in a commercial electromagnetic solver. Good agreement is reported. To demonstrate the feasibility of developed performance limitations, they are compared to the performance of a loop and a dipole antenna showing the importance of various loss mechanisms during the design process. The trade-off between tissue loss and antenna ohmic loss indicates critical points at which the optimal solution drastically changes and the chosen topology for a specific design should be changed. |
| title | Maximum Radiation Efficiency of Arbitrarily-Shaped Implantable Antennas |
| topic | Medical Physics Applied Physics Biological Physics Computational Physics |
| url | https://arxiv.org/abs/2307.16466 |