Formulas & Data:
- Electronics
- Mathematics
- Physics
- RF & Microwaves

Parts Vendors:
- all hand-selected

- Amateur Radio
- Vintage Articles:
- Electronics World
- Popular Electronics
- QST
- Radio & TV News
- Radio Craft
- Short Wave Craft
- Wireless World

- Events Calendar
RF Cafe Homepage
Copyright 1999-2015   •−•  ••−•    −•−•  •−  ••−•  •   "RF Cafe" in Morse Code  >> Listen to It <<
- EW & Radar Handbook
- Quizzes       - Software
- App Notes
- Calculators
- Advertise on RF Cafe
- About RF Cafe™
- RF Cafe Shirts & Mugs
- RF Cafe Archives
RF Cafe Book Contest
- RF Cafe on Visit RF Cafe on Facebook Visit RF Cafe on Twitter Visit RF Cafe on LinkedIn
- Tech Humor
- Forums Archive
- Job Board
- Donate to RF Cafe
- Kirt's Cogitations
Custom Search
More than 10,000 searchable pages indexed.
Greetings: There is so much good stuff on RF Cafe that there is no way to list or link to all of it here. Please use the Search box or the Site Map to find what you want - there is a good chance I have it here. Thanks!

load pull with ADS - 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.


Noise
Post subject: load pull with ADS Posted: Wed May 02, 2007 9:50 am

Captain


Joined: Tue May 02, 2006 4:59 am
Posts: 15
Hello friends,

I have some problems regarding load pull simulation using ADS design guide.
I am using LDMOS with spice model .
Unfortunately i received error message (converges problem) for large input signal.
For small signal it runs OK.
Maybe the S11_rho and S11_center is not defined well ?
I am not sure I understand how to defined the sweep value for S11

Thanks


Top

Jeanalmira
Post subject: Posted: Fri Jul 06, 2007 5:28 am

General


Joined: Tue Mar 15, 2005 11:43 pm
Posts: 65
Location: Singapore
Hi there,

The converge problem commonly happens during large-signal simulation. What most likely to happen is the large-signal model parameters have limitations on high-power sweep, e.g such as breakdown voltage and so on.

The fast way to check is, you may lower the output power sweep, step by step, let's say by 1dBm and see whether the simulations sweep ok. Or, you may want to try to reduce the sweep power step to smaller steps.

I believe it's nothing wrong with your simulations, the problem lies in the model. So probably you may want to try to modify the model large-signal parameters.

I hope it helps.

Best Regards,
Jean




Posted  11/12/2012

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger… single-handedly redefining what an engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5th MOB: My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website