怎么校准其他类型的连接器

> {quote：title = swoudlxy写道：} {quote}>嗨，>目前我有一个关于校准的问题。
我只有SMA型校准套件，但我必须使用U.FL连接器测量一个天线。
我正在使用一根50欧姆的SMA-U.FL电缆，该电缆不包含在校准过程中用于转换目的。
然而，未经校准的SMA-U.FL电缆似乎严重影响了测量值。
在使用当前的SMA型校准套件时，是否有任何可能的方法可以使用此电缆进行测量？
>非常感谢K我相信Keysight程序PLTS将允许您通过自动修复工具去除进行更好的修正，但这里有一种方法可以在没有昂贵软件的情况下与任何VNA一起使用。
将UFL缩短并将其放在UFL连接器上，然后添加端口扩展以使相位为180度。
这会将参考平面移动到UFL电缆的末端。
Joel的书中有关于使用时域选项010的信息。
您需要平衡简单性/成本/准确性。
简短的＆amp;
端口扩展优于不进行校正，并且可以在零成本的情况下轻松完成。
VNA上的TDR选项将花费您的$$$并仍然需要一些非常重要的处理。
PLTS将花费更多的$$$$$，但使用起来很简单。
戴夫



     以下为原文

  > {quote:title=swoudlxy wrote:}{quote}
> Hi,
> Currently I have one problem regarding the calibration. I only have the calibration kit with SMA type but I have to measure one antenna with U.FL connector. I am using one 50ohm SMA-U.FL cable which is not included in the calibration process for the converting purpose. However, it seems the measured value is badly effected by the uncalibrated SMA-U.FL cable. Is there any possible way that I can still do the measurement with this cable in the measurement while using the current SMA type calibration kit? 
> Many thanks
K

I believe the Keysight program PLTS will allow you to do a better correction with its automatic fixteure removal,  but here is one method which will work with any VNA without owning expensive software. Make a UFL short and put it across the UFL connector, then add a port extension so that the phase is 180 degrees. That will move the reference plane to the end of the UFL cable. 

There's information in Joel's book about using the time domain option 010 for this too. 

You need to balance simplicity/cost/accuracy.  The short & port extensions is better than no correction and can be done for little effort at zero cost. The TDR option on a VNA will cost you $$$'s and still requires some nontrivial processing.  PLTS will cost even more $$$$$'s, but is simple to use.  

Dave

这种方法怎么样？
您可以从Pasternak连接器订购SMA到u.FL适配器。
将适配器放在电缆的末端，并使用连接到VNA的电缆校准适配器。
然后使用Port Extensions退出SMA适配器。
我假设你在这里只测量S11。
这可能在高达3 GHz左右的合理精度下工作。
所有赌注均高于所有赌注。
此处的端口扩展值将为负值，而不是正值，因为您要通过SMA将传输线长度移除到u.FL adatper。
卡琳



     以下为原文

  How about this approach.  You can order a SMA to u.FL adapter from Pasternak Connectors.  Put the adapter on the end of the cable and calibrate to the adapter with the cable connected to the VNA.  Then back out the SMA adapter with Port Extensions.  I am assuming you are measuring only S11 here.  This would probably work with reasonable accuracy up to 3 GHz or so.  Any higher then all bets are off.  The Port Extension value would be a negative value here, not positive since you are removing transmission line length via the SMA to u.FL adatper.
Karin