How to calculate the RCS of 2D target?

Bempp
1

Hello there!
My problem discribed with the help of deepseek is as follow:
To compare the differences in the radar cross section (RCS) of 2D targets calculated using the Finite Element Method (FEM) and the Method of Moments (MoM), I plan to use Bempp for simulating the RCS of 2D targets. However, I noticed that the tutorials in Bempp only cover 3D targets or RCS calculations for multiple targets. Additionally, since the Green’s functions are encapsulated within the operators and the 2D Green’s function differs from the 3D version, I am unsure whether Bempp supports computations for 2D targets.

Key Points of Concern:

  1. Lack of 2D Tutorials: Existing Bempp examples focus on 3D scenarios.
  2. Green’s Function Differences: 2D and 3D Green’s functions have distinct formulations, and their integration into Bempp’s operator framework may vary.
  3. Feasibility: Whether Bempp inherently supports 2D electromagnetic simulations despite its 3D-focused documentation.

Suggestions for Resolution:

  • Check Bempp’s API or documentation for explicit 2D operator support.
  • Adapt 3D tutorials to 2D by modifying boundary conditions and Green’s functions.
  • Verify with simple 2D benchmarks (e.g., circular cylinder RCS) against analytical solutions.
2

Hello,

Bempp currently only supports 3D targets, and it’s not really feasible to update the current code to support 2D, as 3 dimensions are hard coded in a lot of places.

We have some plans to allow the upcoming Rust-based bempp-rs to support 2D problems, but that feature is a long way off.

3

Thank you for your response! I will try to find other software to address my problem. If you have any recommendations for tools suitable for 2D electromagnetic scattering problems or RCS calculations—especially open-source libraries supporting MoM or BEM—I would greatly appreciate it.