彻底弄明白HFSS端口激励的区别 Lumped port、wave port
2016-11-03 by:CAE仿真在线 来源:互联网
lumped ed port=> the excitation is applied at a point/cell, as a voltage or current.
wave-port=> the excitation is so-called eigen(本征)-wave, such as the quasi-tem wave supported by a microstrip line. It applies over a cross-sectional area.
voltage is scalar, wave is vector by nature, hence there are substantial difference between the two.
So use waveport whenever possible, because "simulation of wave phenomenon" is what HFSS is designed for. And compare with the "correct" measurement whenever possible (i.e. measure "wave", not simply "voltage").
Why lumped port is there? It is easy to applied and people found that good/reasonable results can be obtained.
Why? if the frequency is low enough or the excitation is applied at sufficiently small area, then the "wave" can be described by some "voltage" or "current", which must be "measured"/"calculated"/de-embedded/etc in the correct manner.
那为什么还要使用lumped port呢,这是由于lumped port激励的添加简单,并且可获得良好的结果。如果频率很低或者激励加在足够小的区域上,“波”就可以用“电压”或“电流”来描述,必须用正确地方式测量、计算。
if the excitation can be applied on some locally uniform region=>waveport, if geometry/material discontinuities are near/closer to the point of excitation=>lumped ed port might be the only way.