FEM Simulation for EM Analysis

In Finite Element Method (FEM) simulation, a geometric object that requires electromagnetic analysis is first discretized.

Each part of this discretized structure is known as a finite element. This FEM simulation is a frequency domain technique that’s used for handling the geometry and materials of closed structures. It requires meshing of the entire structure, as well as an Absorbing Boundary Condition (ABC) boundary, to perform the EM analysis.

The unknown parameters are determined over each mesh as a sum of functions.

It can be complex to perform simulations on larger structures due to the intricate mesh and the large matrices involved, which demand significant memory. However, FEM simulation is widely used in high-frequency antenna design and simulation due to its numerous advantages.

Here are a few key advantages:

• Ideal for the analysis of RF filters, cavities, and resonator circuits.
• Produces good theoretical results for geometries with larger ports, closely matching actual results.
• Suitable for high-quality factor (Q) based RF circuits.

FEM-Based Solvers for EM Simulation

• Computer Simulation Technology Microwave Studio (CST MW)
• HFSS
• FEKO