非标准负载对校准有什么影响

许多论文都描述了非标准负载（我认为你的意思是非Z0或非50欧姆）对S参数的影响，但可能并不是你想要的那么直接。
我将在本书的第3.9节中介绍这些案例，在这里你会发现，如果所有其他错误都很小，那么加载中的错误也会成为源匹配中的错误，并且加载中的错误会匹配。
如公式3.86所述，这会产生回波损耗，其中负载误差变为EDF~R~和ESF~R~，ERF很小。
它将影响传输不确定性，如等式3.99至3.101所述。
在这种情况下，唯一的误差是ESF~R~和ELF~R~EDF~R~是负载误差的度量，它是负载的线性回波损耗，因此如果你有45欧姆的负载
在50欧姆系统上，您的误差将是EDF~R~ = |（45-50）/（45 + 50）| = 0.052线性或26 dB残余负载匹配。
注意，通常负载是复杂的，并且由于寄生L或C而误差通常较大，而不是实际（DC）值中的误差.REF：微波元件测量手册，http：// www。
wiley.com/WileyCDA/WileyTitle/productCd-1119979552.html



     以下为原文

  The effect of non-standard loads (which I suppose you mean non-Z0, or non-50 ohm) on S-parameters has been described in many papers, but maybe not so directly as you like.

I cover the cases in section 3.9 of my book , where you will discover that, if all other errors are small, the error in the load also becomes the error in the source match, and the error in the load match.  This effects return loss as described in equation 3.86 where load error becomes EDF ~R~ and ESF ~R~, ERF being small.  It will effect transmission uncertainty as described in equaition 3.99 through 3.101.  In this case the only errors are ESF ~R~ and ELF ~R~

The EDF ~R~ is a measure of the error in the load, it is the linear return loss of the load, so that if you had a 45 ohm load on a 50 ohm system, your error would be
EDF ~R~ =|(45-50)/(45+50)|=0.052 linear or 26 dB residual load match.  
Note that in general the load is complex and the error will often be larger due to the parasitic L or C, rather than the error in the real (DC) value..

REF: Handbook of Microwave Component Measurements, http://www.wiley.com/WileyCDA/WileyTitle/productCd-1119979552.html

谢谢Joel博士。
得到这本书。
好消息。
关心卡琳



     以下为原文

  Thank you Dr. Joel.  Gotta get the book.  Good info.
Regards 
    Karin

关于这个主题的一篇好文章是D.K.
Rytting，“网络分析仪准确度概述”，第59届ARFTG会议摘要，11月29日＆amp;
2001年3月30日本文可在IEEE Exporer Ken中进行搜索



     以下为原文

  A good paper on this topic is 
D.K. Rytting, " Network Analyzer Accuracy Overview", 59th ARFTG Conference Digest, Nov. 29 & 30, 2001
This paper is searchable in IEEE Exporer

Ken