Return to discussion board
已回答
HFSS仿真微带线S参数与测量结果差异较大，如何排查？
在HFSS中仿真一段50欧姆微带线的S参数，与VNA测量结果在高频段（>10GHz）差异明显，主要表现插入损耗偏差较大。
HFSSS参数微带线
新手SI2026-08-192345Answer
2Answer
Accepted Answer
High-frequency discrepancies are typically caused by the following: 1 Material parameters (Dk/Df) not accurately modeled for frequency dependence; 2 Conductor surface roughness model not enabled; 3 Inconsistent port calibration reference planes. First, verify material settings and enable the Huray roughness model, then compare simulated and measured group delay.
Senior Engineer2026-08-19
Additionally, verify that the mesh is sufficiently fine. At high frequencies, the skin depth decreases, so ensure there are at least 3 to 4 mesh layers across the conductor cross-section. Also, placing radiation boundaries too close to conductors can introduce errors.
Simulation Expert2026-08-19
Write Answer
Answer to get+5 points