Full-Wave Modeling of RF Exciters Using WIPL-D: Road to Real-Time Simulation and Optimization

Authors

  • Pranav S. Athalye Electrical & Computer Engineering Department, Colorado State University, Fort Collins, CO
  • Milan M. Ilić 1 Electrical & Computer Engineering Department, Colorado State University, Fort Collins, CO,2 School of Electrical Engineering, University of Belgrade, Serbia
  • Branislav M. Notaroš Electrical & Computer Engineering Department, Colorado State University, Fort Collins, CO

Keywords:

7-T, antennas, bioelectromagnetics, computational electromagnetics, FDTD, helical antenna, high-frequency, imaging, microwave, resonance imaging, RF coil

Abstract

Computational tools for full-wave three-dimensional (3-D) simulations of linear passive electromagnetic (EM) components have reached a point where they became both practical and necessary in computer aided design (CAD) of RF devices. Although circuit-based solvers still offer unprecedented speed and true real-time tuning, full-wave software tools, which take into account almost all physical EM phenomena, rapidly approach similar efficiency and applicability. This, however, is not possible by just using modern hardware environment, but it also requires the numerical method of choice, encapsulated within a software tool, to be extremely precise and conservative in consumption of computer resources, i.e., CPU and memory. We here report a case study which demonstrates highly efficient utilization of higher order large-domain method of moments (MoM) modeling and optimization using WIPL-D. The example includes an RF exciter, based on axial-mode helical antennas mounted on a dielectric support, designed for utilization in the state-of-the-art pre-clinical magnetic resonance imaging (MRI) scanners.

Downloads

Download data is not yet available.

References

H. Yoo, A. Gopinath, and J. T. Vaughan, “A method to localize RF B1 field in high-field magnetic resonance imaging systems,” IEEE Trans. on Biomedical Engineering, vol. 59, pp. 3365-3371, Dec. 2012.

WIPL-D Pro v11. WIPL-D d.o.o. ed2014.

HFSS, ANSYS®. Electromagnetics Suite 17.1.0, ed: ANSYS, Inc.

B. M. Notaros, M. M. Ilic, A. A. Tonyushkin, N. J. Sekeljic, and P. Athalye, “Quadrifilar helical antenna as a whole-body traveling-wave RF coil for 3T and 7T MRI,” Proceedings of the 23th Scientific Meeting of the International Society for Magnetic Resonance in Medicine, ISMRM 2015, Toronto, Ontario, Canada, pp. 1825, 30 May–5 June, 2015.

A. R. Djordjevic, A. G. Zajic, M. M. Ilic, and G. L. Stuber, “Optimization of helical antennas,” IEEE Antennas and Propagation Magazine, vol. 48, no. 6, pp. 107-115, 2006.

Downloads

Published

2021-07-22

How to Cite

[1]
Pranav S. Athalye, Milan M. Ilić, and Branislav M. Notaroš, “Full-Wave Modeling of RF Exciters Using WIPL-D: Road to Real-Time Simulation and Optimization”, ACES Journal, vol. 33, no. 10, pp. 1156–1158, Jul. 2021.

Issue

Section

Articles