Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Forums Magazine Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Anritsu Alliance Test Equipment Amplifier Solutions Anatech Electronics Axiom Test Equipment Berkeley Nucleonics Bittele Centric RF Conduct RF Copper Mountain Technologies Empower RF everything RF Exodus Advanced Communications Innovative Power Products ISOTEC KR Filters Lotus Systems PCB Directory Rigol RF Superstore San Francisco Circuits Reactel RFCT TotalTemp Technologies Triad RF Systems Windfreak Technologies Withwave LadyBug Technologies Wireless Telecom Group Sponsorship Rates RF Cafe Software Resources Vintage Magazines Thank you for visiting RF Cafe!
Anatech Electronics - RF Cafe

load pull with ADS - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2010 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 Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. 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.

NOTICE: The original RF Cafe Forum is available again for reading, and the new RF Cafe Blog is an active board.

-- Amateur Radio

-- Anecdotes, Gripes, & Humor

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Miscellany

-- Swap Shop

-- Systems

-- Test & Measurement

-- Webmaster

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

RF Electronics Shapes, Stencils for Office, Visio by RF Cafe
Exodus Advanced Communications Best in Class RF Amplifier SSPAs
RF Cascade Workbook 2018 by RF Cafe
Anritsu Test Equipment - RF Cafe
Axiom Test Equipment - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free

 

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    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 Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

AirplanesAndRockets.com