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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...

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Looking for a formula for intermodulation - RF Cafe Forums

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Geof Gibson
 Post subject: Looking for a formula for intermodulation
Posted: Tue May 31, 2005 5:23 pm 
Hi,

I'm looking for math and formulas behind calculating intermodulation products. I know the fundamentals; a+b+c+d, a+b+c-d, etc.

What I'm trying to find are formulas which can be used to take n=number of frequencies, o=order, and calculate all the intermod. products that fall within a given range.

Any pointers to this information would be greatly appreciated.

Thank you.

I can be reached at geofgibson@cox.net


 
  
 
Kirt Blattenberger
 Post subject:
Posted: Wed Jun 01, 2005 8:41 pm 
 
Site Admin
User avatar

Joined: Sun Aug 03, 2003 2:02 pm

Posts: 653

Location: Erie, PA

Greetings Geof:

I believe this paper, by Chris Arnott (whom I worked with at one time), is what you are looking for.

"A General Algorithm to Calculate Third Order Intermodulation Product Locations for any Number of Tones"

http://www.cedmagazine.com/ced/2001/0201/webx/x02.htm

It can also be found as a link on RF Cafe on the App Notes page (1) and on the Electrical Formulas & Reference page.

(2) https://www.rfcafe.com/references/electrical.htm

- Kirt Blattenberger :smt024


Posted  11/12/2012

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