I have been trying to reproduce the results of some metamaterial absorber papers using CST Studio 2022. The S parameter results have been successfully reproduced. When I add the E-Field monitor, H-Field monitor, and Surface current monitor at the resonant frequency and run the simulation, the E field and H field results appear, but the Surface current monitor shows nothing. What are the possible reasons for this? How can this problem be solved?
It's frustrating when simulation results don't match expectations. Here are some possible reasons why your surface current monitor might be showing nothing in CST Studio 2022, along with suggestions to troubleshoot:
1. Incorrect Monitor Settings:
- Check Units: Ensure the monitor units are set correctly (e.g., A/m or mA/mm) to match your simulation setup. Inconsistent units can result in zero values.
- Monitor Location: Verify the monitor is placed on a surface with expected current flow. Double-check its orientation and alignment with the structure.
- Mesh Settings: Ensure the mesh is fine enough to capture the current distribution accurately. Try refining the mesh locally around the area of interest.
2. Material Properties:
- Non-conductive Materials: If the surface being monitored is made of a non-conductive material, no current will flow, and the monitor will show nothing.
- Lossy Materials: Ensure the material properties account for conductivity and permittivity accurately. Incorrect values can lead to negligible currents.
3. Simulation Settings:
- Frequency Range: Make sure the simulation frequency matches the resonant frequency you mentioned. Mismatched frequencies can result in minimal current flow.
- Boundary Conditions: Check if any boundary conditions are affecting current flow. Open boundaries or incorrect terminations can impact surface currents.
- Excitation Source: Verify that the excitation source is properly defined and interacts with the structure to induce currents.
4. Software Glitches:
- Restart CST: Sometimes, a simple restart of the software can resolve temporary glitches.
- Check for Updates: Ensure you're using the latest version of CST Studio to avoid known bugs.
Additional Tips:
- Consult Documentation: Refer to the CST Studio documentation for specific instructions and troubleshooting tips related to monitors and surface current visualization.
- Search Online Forums: Look for similar issues and solutions discussed in online forums dedicated to CST Studio.
- Contact Support: If the problem persists, consider contacting CST support for further assistance.
Mohamed Ahmed Maher , I reinstalled the CST software, used the waveguide port instead of the floquet port, increased the number of meshes, and tried other solvers. I also tried other upgraded versions of CST. But nothing changes; it still appears the same.
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