如何为MIMO应用设置E5071C

考虑到MIMO测量，它实际上取决于您要确定的内容。
如果它只是天线的VSWR，那么没问题。
只要可以将切换设置为允许测量所有路径的状态，假设天线不是非线性的，则根本不需要使所有天线都有效以确定任何干扰效应。
但是可能需要您对结果进行一些数学计算，以确定您想要查看的具体特征。
这类似于无源设备上的差分测量问题，已被清楚地证明能够使所有需要的测量一次刺激一个端口并正确地组合结果。
但是对于详细的答案，您最好发布一个测试天线的图表，显示连接，开关状态，要测量的内容以及预期的品质因数（例如，天线1的VSWR）
利用与信号驱动天线1）异相90度的信号同时驱动天线2。



     以下为原文

  With repect to MIMO measurements, it really depends on what you are trying to determine.

If it is simply the VSWR of an antenna, then no problem.  It is not at all necessary to have all antennas active to determine any interference effect as long as the swtiching can be set to a state that allows all the paths to be measured, presuming the antennas are not acting non-linear.  But it may require you to do some math on the results to determine the specific characteristics that you want to see.

This is similar to the problem of differential measurments, on passive devices, which has been clearly demonstrated to be able to make all the needed measurements stimulating one port at a time and properly combining the results.

But for a detailed answer, you would be best to post a diagram of you antenna-under-test showing the connections, the switching states, what is to be measured and what is the expected figure of merit (e.g., VSWR of antenna 1 when antenna 2 is driven at the same time with a signal 90 degrees out of phase with the signal driving antenna 1).

嗨乔尔博士，谢谢你的信息。
目前我有Agilent 8753D网络分析仪，30 kHz至3 GHz已经过时。
我的MIMO 2x2天线测量是否足够？
如果8753D无法完成这项工作，我想要获得E5071C。
是否有2x2 MIMO的通用设置图？
我现在没有带有现有连接的实际MIMO天线测试。
希望你能帮忙。



     以下为原文

  Hi Dr Joel,

Thanks for the info.

Currently I have Agilent 8753D Network Analyzer, 30 kHz to 3 GHz which is already obsolete.

Is it sufficient for my MIMO 2x2 antenna measurement? I'm thinking to get E5071C if 8753D cannot do the job.

Is there any general setup diagram for 2x2 MIMO?

I does not have an actual MIMO antenna-under-test with the connections on-hand now.

Hope you can help.

我不太熟悉2x2 mimo测试的要求，所以我不能真的建议你。
如果您想出一个测试场景（如“测量一个天线的S11，同时在0到180度的相位驱动，具有相同的幅度”），那么我们当然可以告诉您需要设置什么才能完成
测量。
但您需要确定我们的测量要求才能提供帮助



     以下为原文

  I'm not so familiar with the requirements for 2x2 mimo test, so I can't really advise you.

If you come up with a test scenario (as in "measure the S11 of one antenna while driving both at phases from 0 to 180 degrees, with the same amplitude"), then we can certainly tell you what the setup is needed to do the measurement.  But you will need to determine the measurement requirements for us to help

谢谢Joel博士，没问题，我理解。
我的2端口8753D可以完成MIMO天线特性测量吗？
或者我需要一个4端口E5071C？



     以下为原文

  Thanks Dr Joel, 

No problem, I understand.

Can my 2 port 8753D do the job for my MIMO antenna characteristics measurement?

Or I need a 4 port E5071C?

再一次，您必须向不熟悉Mimo 2x2测试的人（如我）描述您的天线是什么样的，以及您要测试的内容。
说“你能测试mimo 2x2”对我来说意味着“你可以测试XCdkja; riu”;
但如果你能把它放到RF刺激响应的背景下，那么我可能会帮助你。
（如果我真的雄心勃勃，我可以研究Mimo 2x2测试并弄明白，但我不是，所以我会留给你解释给我）。



     以下为原文

  Once again, you gotta describe what you antenna looks like, and what you're trying to test, to a someone (like me) who is not familiar with Mimo 2x2 test.  Saying "can you test mimo 2x2" means the same to me as "can you test XCdkja;riu"; but if you can put it into the context of RF stimulus response, then I can likely help you.  (if I was really ambitious, I could research Mimo 2x2 test and figure it out, but I'm not, so I'll leave it to you to explain it to me).