The performance of antennas installed on large platforms such as vehicles, ships, and aircraft is strongly affected by the surrounding environment, which can significantly influence their radiation characteristics and make optimization challenging. Therefore, it is essential to accurately simulate the interaction between the antenna and its surrounding environment.
Electromagnetics Infinity provides simulation services related to antenna placement, including:
- Installed far-field radiation pattern analysis
- Mutual coupling analysis between antennas
- Optimization of antenna placement on platforms such as vehicles, ships and aircraft
- Simulation of various scenarios, for example mmWave radar interaction with a road or cellular coverage in urban environments
Different electromagnetic numerical methods are implemented in Ansys HFSS software through different solvers. The choice of the method depends on the electrical size of the geometrical model, expressed in wavelengths.
For small to medium-sized problems, the following accurate numerical methods are commonly used:
- Finite Element Method (FEM), including domain decomposition techniques
- Method of Moments (MoM)
- Hybrid methods combining FEM and MoM
For electrically large problems, a high-frequency asymptotic technique known as the Shooting and Bouncing Ray (SBR+) method is used.
In Ansys HFSS, the SBR+ solver extends the conventional SBR approach by incorporating advanced diffraction mechanisms, including Physical Theory of Diffraction (PTD), Uniform Theory of Diffraction (UTD) and creeping waves effects, resulting in improved modeling accuracy.