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MWOffice Simulation of Diode Input Impedance - RF Cafe Forums

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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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