Overcoming Challenges in Electromagnetic Analysis of Electrically Large Multi-Scale Structures
- Shanker Balasubramaniam, MSU Electrical and Computer Engineering
Thursday, December 5, 4:10 PM - Physics and Astronomy Colloquium
Biomedical & Physical Sciences Bldg., Rm. 1415
Understanding electromagnetic field distribution plays a key role in a range of devices; from photonic circuits to packaging to metamaterials to antennas to EMC/EMI issues, etc. While this list is long, the ability to simulate electromagnetic fields in realistic devices requires the discretization to span multiple scales; from 10−5λ ≤ h ≤ 0.1λ. Such wide variation in mesh density implies that any methodology should (i) be mesh-robust, highly adaptable and well conditioned, and (ii) be integrated with a methodology whose computational cost and memory complexity scale almost linearly with the number of the unknowns. This talk will present some of our work to date on addressing these two problems.
We will present recent work based on a highly flexible surface approximation scheme that can start from an arbitrary description of the underlying scatterer, enabling a framework that provides for near-complete freedom in choice of the approximation space. Next, we will focus on both recent and not-so recent efforts to bridge the transitions in the electromagnetic spectrum, from RF to DC and RF to optics. Examples illustrating the efficacy of these methods and their application to a range of problems will be presented.