[已解决]Active S参数和S参数之间有什么不同？

Active S参数和S参数之间有什么不同啊？他们之间的计算关系是什么啊（HFSS中）？求具体表达式啊？写程序需要啊！ bm|8Jbsb&  
求各 .. dg<fUQ  
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HFSS的帮助文件没有写么？ 1d6pQ9 N  
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网上百度搜不到么？

网上找了半天没找到呢，帮助倒是没看，我去看看

还是没结果啊    大神们。。。。求赐教啊

给你抄一段CST MWS的帮助文件： 9B)<7JJX!J  
However, in the case of simultaneous excitation several ports are stimulated at once, so it is not possible to apply the general S-Parameter definition. Now the incident and reflected spectra are given as so-called incident and reflected F-Parameters, all normalized to the spectrum of the reference signal. Furthermore, as an additional result and for a better analysis of the structure's behavior, the reflected spectra of all excited ports are normalized to their own incident spectra, respectively, providing so-called active S-Parameters. Since there might be more energy absorbed at a specific port than it itself has injected, the resulting curves could show active behaviour with values greater than one. !+EE*-c1c  
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我不相信HFSS的帮助文件里没有。

我作证， HFSS的帮助文档里真没有，里面只有active Z和Z的定义。不过从active Z和Z的定义可以推测出active S和S的定义，所谓ACTIVE S也就是各个端口都有入射波的情况下，n端口的反射波与n端口的入射波的比，就是active Snn,不过要注意的是，对于N端口的器件，ACTIVE s只有N个，而不是N^2

具体表达方式回帖不好写，你可以在HFSS文档里搜索ACTIVE Z，有ACITVE  Z的具体公式，然后你可以类比出ACTIVE S的公式

我2了，HFSS文档里有的是ACTIVE S的定义，需要自己类比出ACTIVE Z。。。。

谢谢楼上的回答

active s is the reflection coefficient of one port when another port is excited... tar/no  
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for example, a 2 port system ,the total reflect wave at port 1 is S11*V1+S12*V2 "/R?XCBZsb  
the total reflection coefficient is total reflect wave at port 1 over total incident wave at port 1,then reflect coefficient is (S11*V1+S12*V2)/V1,which is the active S(1:1)，