Measuring S param. on 0402 RF boards using tiny semirigid - RF Cafe Forums

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Humane Society

Post subject: Measuring S param. on 0402 RF boards using tiny semirigid

Posted: Wed Jul 12, 2006 3:04 pm

Lieutenant

Joined: Wed Jul 12, 2006 2:20 pm
Posts: 4
Location: Arizona

Well
I cannot believe I cannot find a solution!
I am trying to find a way of calibrating small tiny semirigid coax cables ( 1.2mm diameter ) for measuring S param. on RF boards populated with 0402 components. I tried soldering one end of this semirigid on a SMA connector already mounted on RF board, to use it as a reliable way of connecting my calibration kit and use it for reflection calibration.
Then I use a semirigid coax cable ( both ends SMA terminated ) to calibrate the trasmission, but at the end of calibration procedure, the measurements I took, differ a lot from "clasical calibration" ( the one which is using just simple coax cables ).
Where am I wrong ? What is going on?
ADS said that is very difficult to calibrate such stuff on 8753E unless I am using an additional software.
Please advise. Your help will be greatly appreciated.
Ted
(mtedpl@sbcglobal.net)

Humane Society

Post subject: Kirt, or Jerry please give me a solution

Posted: Thu Jul 13, 2006 5:34 pm

Lieutenant

Joined: Wed Jul 12, 2006 2:20 pm
Posts: 4
Location: Arizona

So, I am still waiting for at an idea.
I do not think nobody used to work on 0402 parts.
Please !
Ted

Posted 11/12/2012

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