Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate
that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views.
It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if
you would like to post something on RF Cafe's
page, please do.
Below are all of the forum threads, including all
the responses to the original posts.
Post subject: HI, I Am a New Comer. On Wafer Calibration
Unread postPosted: Fri Apr 15, 2005 2:53 am
I am a new comer here. Recently I have been doing research
of microstrip line and CPW line. Since I keep testing the my device,
the calibration kit for network analyzer was used up pretty quickly.
I am wondering if there is a way to put the calibration lines on
my wafer? Does anyone have the samiliar experience like me?
Fri Apr 15, 2005 9:53 am
You can put calibration lines on wafer.
But most people use a a TRL calibration kit which is G-S-G ( Ground
signal ground) 0n alumina, or you can make up your own alumina cal kit.
All you are doing is calibrating to probe tips , so it does not matter
what you use. Most people do not use the wafer because of the expense,
why waste money on transmission line when you can place additional circuits
on the wafer. I would make it on alumina, much cheaper. One more thing,
when you design your circuit, make sure you have probe points designed
in which are compatible with the probes you are using. A good book is
written by Scott A. Wartenberg, "RF Measurements of Die and Packages".
It is published by Artech House, ISBN 1-58053-273-x. You can get it