S参数问题！

请教高手：hfss算S参数的时候，是根据输入端口的电磁波的能量与输出端口的电磁波的能量之间的某种比例关系来计算的吗?还是根据相位关系算的?
谢谢！

贴帮助文件中的几段话，希望对你有帮助：
1.When solving for the S-parameters, HFSS assumes that the structure is excited by the natural field patterns (modes) associated with these cross-sections
2.Lumped ports compute S-parameters directly at the port.
3.HFSS solves in the frequency domain and obtains a phasor representation of the steady-state finite element field solution. Physical quantities such as the instantaneous (time domain) electric field are then obtained as derived quantities from the phasor representation
S参数用来描述端口间能量反射和传输特性
=[s][a],其中这里的元素都是复数，有幅度和相位，通常我们用dB作单位来得到s参数图
其中，|bi|^2 是端口i的传输或反射功率，|ai|^2是端口i的入射功率，ai和bi的相位表示入射和反射/传输场在t＝0时的相位

1谢谢啊！谢谢啊！

222谢谢啊！

似的谢谢啊！谢谢啊！

S参数是根据电压关系算的，关于S参数问题，推荐小编看看微波技术相关书籍

waveport和lumpport的s参数的定义是一样的么?