Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while tying up your telephone line, and a nice lady's voice announced "You've Got
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MWOffice simulation of DIode Input Impedance - RF Cafe Forums
RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media
platforms dominating public commenting venues. RF Cafe Forums began sometime around
August of 2003 and was quite well-attended for many years. By 2010, Facebook and
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Forums activity dropped off precipitously. If the folks at
phpBB would release a version with integrated
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but until then it is probably not worth the effort. Regardless, there are still
lots of great posts in the archive that ware worth looking at.
Below are the old forum threads, including responses to the original posts.
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Post subject: MWOffice simulation of DIode Input Impedance
Unread postPosted: Thu Sep 30, 2004 2:57 am
Joined: Mon Sep 06, 2004 5:43 am
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.
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.
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.
Post subject: more questions
Unread postPosted: Thu Sep 30, 2004
Joined: Mon Sep 06, 2004 5:43
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.
appreciate the help!