New Application Note: Benchmarking Monostatic RCS Simulation Methods at 10 GHz

Predicting the monostatic Radar Cross Section (RCS) of an electrically large target such as an aircraft is one of the most demanding tasks in computational electromagnetics. Engineers routinely face a trade-off between full-wave solvers, which deliver the highest fidelity but can take days to converge, and fast approximate methods, which return results in seconds at the cost of accuracy in the details that matter most.

Our latest Application Note benchmarks five simulation approaches available in WIPL-D: full-wave Method of Moments (MoM), the Domain Decomposition Solver (DDS), Physical Optics (PO), Extrapolation, and a hybrid (Extrapolation + PO) method, against the same aircraft model at 10 GHz, so engineers can choose the right tool for their accuracy and turnaround requirements.

The study compares the full-wave MoM reference, which required 1.4 million unknowns and nine days of computation, against DDS, which reached close agreement with the reference in about 50 hours. It also evaluates the two fastest methods, PO and the Extrapolation + PO hybrid, both completed in a fraction of that time on the same workstation.

Topics covered include:

• Full-wave MoM reference simulation of an aircraft model at 10 GHz
• Domain Decomposition Solver (DDS) as a fast full-wave alternative
• Physical Optics (PO), Extrapolation, and hybrid Extrapolation + PO methods
• Comparison of simulation time and accuracy across all five methods
• Guidance on selecting a method for a given accuracy requirement and time budget

The presented results show that there is no single “best” method for monostatic RCS simulation, only the best method for a given accuracy requirement and time budget. DDS stands out for engineers who need full-wave-level confidence without a multi-day wait, while the hybrid method offers a compelling fast-turnaround option when approximate results are acceptable.

Section: Radar Cross Section / Scattering

For the full version of the document, please check the following PDF.