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MWOffice simulation of DIode Input Impedance - RF Cafe Forums

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 Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


jatbakar
Post subject: MWOffice simulation of DIode Input Impedance
Unread postPosted: Thu Sep 30, 2004 2:57 am
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Lieutenant

Joined: Mon Sep 06, 2004 5:43 am
Posts: 4
A question on using Microwave Office. I don't have a spectrum analyzer, and would like to simulate a schottky diode (doubler) chip in microwave office.
1)The manufacturer Agilent provided SPICE parameters, but is this enough?
2) And do I use the Z parameter in linear simulation?
I also tried simulating it using an equivalent linear circuit given, but the results were vastly different from using SPICE parameters.

What is the best way of doing it? WOuld completely appreciate (REALLY) the help.


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Guest
Post subject: Non Linear
Unread postPosted: Thu Sep 30, 2004 7:51 am

Since a diode doubler is highly non-linear you should use the spice model for your simulations. You then woud then wan tto use a harmonic balance simulation to determine the impedance. The linear Z-parameters won't help unless you know that they were measured at large signal at the same operating point. The spice model is your best bet.


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jatbakar
Post subject: more questions
Unread postPosted: Thu Sep 30, 2004 8:12 pm
Offline
Lieutenant

Joined: Mon Sep 06, 2004 5:43 am
Posts: 4
Thank you for the tips, but im really slow at this. DO I select the
Z comp parameter under NonLinear>PArameter?

WHy does this option onlygive me the magnitude.

Thanks again,really appreciate the help!



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