Hello,

To improve the efficiency of CST refine simulations, use an appropriate solver like the Multilayer Multilevel Fast Multipole Method (MLFMM) or asymptotic solver for planar structures and large electrical sizes, optimize the mesh by refining it in specific areas rather than globally, ensure correct boundary conditions and material properties, and leverage the eigenmode solver for calculating operating modes instead of a full S-parameter simulation. Employ high-performance computing options and consider model simplification by excluding unnecessary parts of the geometry to reduce computational load.

1. Solver Selection and Strategy

• Choose the right solver:For planar structures like microstrip filters, use the multilayer solver (based on the Method of Moments), which can be more efficient than general-purpose 3D solvers. For very large electrical sizes, the asymptotic solver, which uses ray-tracing techniques, is more suitable.
• Eigenmode solver:For filter design, use the eigenmode solver to directly calculate operating modes, which is more efficient than an S-parameter simulation.

2. Meshing Optimization

• Adaptive Mesh Refinement:Instead of a fine mesh throughout the entire volume, use adaptive meshing. This refines the mesh only where needed, significantly reducing the computational cost and speeding up the simulation, especially with high-performance computing options.
• Avoid Over-Meshing:Do not mesh small structural features excessively unless necessary.
• Edge Refinement Control:Control edge refinement to avoid unnecessary meshing of small details, which can increase computational effort.
• Mesh Lines Per Wavelength:Use a minimum spatial sampling ratio, such as 10 lines per wavelength, to control the mesh density effectively.

3. Model Simplification

• Remove Unnecessary Components:Exclude parts of the geometry that are not critical to the simulation, such as surrounding metallic components, to reduce the model's complexity.
• Simplify Geometry:Avoid explicitly meshing thin metallic layers; let the simulation handle them.

4. Simulation Settings

• Check Material Properties:Ensure that material properties, including losses, are defined correctly for all components.
• Verify Boundary Conditions:Confirm that the boundary conditions are set up accurately, as incorrect conditions can lead to inaccurate results and increased simulation time.
• Frequency Range:Set the simulation frequency range appropriately to avoid unnecessary computation.

5. High-Performance Computing

• Distributed Computing: Utilize high-performance computing options, such as GPU acceleration or distributed computing, to accelerate the meshing and simulation process.
• Thanks