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RFSim99 is a freeware software that can help you in RF simulation, in your projects, especially if you are trying to design radio filters.

RFSim99 works with S-parameters. This means that not only will it simulate and analyse circuits built out of its internal library of components, but that it can accommodate any circuit block or stage for which these are known.

Installing RFSim99 on Windows 7 64-bit OS

Here is how to make RFSim99 work on Windows 7 64-bit OS. You must be running Windows 7 Professional OR Windows 7 Ultimate. Upgrade if you are running anything less. Next, download the Windows Virtual XP Mode for Windows 7 64-bit OS from Microsoft. This will allow you to run any XP program from Windows 7, 64-bit OS. It can be downloaded from Microsoft here: http://www.microsoft.com/windows/virtual-pc/download.aspx . Next, install RFSim99 under the Virtual XP Mode. It works great.
Best regards,
Chris Hudgins

RFSim99 software screenshot

rfsim99

Video presentation of the software

Please write your opinion and give us a feedback in the comments section about this great rf simulator tool. Did you encountered any problems with it?

The video below shows a Tuchstone s-parameter s2p file that was generated on a homebrew N2PK VNA being simulated in RFSim99. The s-parameter s2p file is for a ITT 10.7MHz roofing filter.

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30 Responses to “RFSim99 Download”

  1. Newton S. says: on May 10, 2009 at 5:18 pm

    Good software

    • Bojan says: on July 6, 2012 at 2:19 am

      Installation on w7 is actually much simpler than described above.

      What doesn’t work on w7 is setup program – but application itself runs without problems.
      So, all you need is to copy sim99 program folder (with it’s content) from another computer, and to create necessary shortcuts (if you wish).

  2. RFtech says: on June 16, 2009 at 5:06 pm

    Awesome software for any RF tech or Engineer to do proper design on the cheap. I like the way let’s open your S-paramters from you Network Analyzer and match the impedance with circuit type and values.

    • Karthikeyan says: on September 10, 2009 at 4:06 am

      Dear RF tech can you explain How to match the S parameters values with the Equivalent circuit to extract the values.

  3. atilla says: on August 25, 2009 at 6:42 am

    very good.thanks

  4. a very good software

  5. Vasant Rathod says: on January 10, 2010 at 7:22 am

    A very useful software

  6. Milan says: on June 2, 2010 at 9:16 pm

    Very good software,i use this software long time for my radioamateur hoby. Thanks

  7. Eddie says: on June 9, 2010 at 9:32 pm

    I wasn’t able to install on my Windows7 64-bit OS. Will there be a version to support that?

    • Hi, From memory, I 1st installed RFSim99 onto a Windows xp laptop then copied and transferred it to my Windows 7 64 bit laptop.

  8. Guido says: on June 15, 2010 at 1:11 am

    It’s a very complete (and Free) RF software. Thanks

  9. W3lej says: on July 1, 2010 at 12:42 am

    I’ve used this SW off and on for several years. It is very straight forward and provides a number of good calculators for matching and filters. It’s inductor calculator is also usefull covering both hand wound and printed version. Similarly the microstrip calculator is handy for determining 50 ohm tracks on G10

  10. Muy bueno y funciona en linux con el simulador Wine

    gracias

  11. ok…..ok…..ok

  12. Victor C. says: on December 2, 2010 at 5:00 pm

    I love this software, I have used to help in to create commercial products and it works great. It is so easy to use, and it gives very accurate results.
    Esta muy bien este programa, lo utilizo bastante seguido.

    VC

  13. no list 0f transistor componen. but this software is good

  14. Martin says: on March 7, 2011 at 10:40 pm

    Genius. Just used this software to design a comms system – many thanks.

  15. Rey says: on May 5, 2011 at 2:52 am

    no me anda en win7, alguien sabe como se puede hacer?

  16. very good software
    Thanks

  17. I seem to have a problem installing under Windows 7. I have tried to make sure it is not being “blocked”. I get the winzip extractor box, but then it says “unable to run setup.exe”.

  18. I’m also having trouble downloading onto Windows 7 64-bit.

  19. when i downloaded in my windows 7 (home basic)32-bit operating system, i couldn’t get the HELP section.

    • Has anyone managed to get this working on windows 7?

      I tried to extract the file with a different extractor but still didn’t have any luck. I have tried this with different versions of windows on multiple machines. I have also tried in compatibility mode with all older versions of windows.

      any more suggestions?

      @404wibbs

  20. Windows 7 Solution:

    http://www.eyou.com.au/product/rfsim99/

    Installing on Windows 7 64-bit OS
    Chris Hudgins (18.09.2010 06:11:24)
    Here is how to make RFSim99 work on Windows 7 64-bit OS. You must be running Windows 7 Professional OR
    Windows 7 Ultimate. Upgrade if you are running anything less. Next, download the Windows Virtual XP Mode
    for Windows 7 64-bit OS from Microsoft. This will allow you to run any XP program from Windows 7, 64-bit
    OS. It can be downloaded from Microsoft here: http://www.microsoft.com/windows/virtual-pc/download.aspx .
    Next, install RFSim99 under the Virtual XP Mode. It works great.

    Best regards,
    Chris Hudgins

  21. I have had no success in downloading this
    program for windows 7..does it work for windows 7 and how is it downloaded

  22. Nice tool. Although I have to study how to use it to design an BLF177 MOS VHF output match 70MHz / 50MHz.

    I could not install under WIN7pro64.

  23. Great software. Was looking for something like this! AND it does work on Windows 7 following the above directions.

  24. u r really good..

  25. Thanks a lot.
    This is very good tools for RF simulation.

  26. Thanks a lot.

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