FREE CIRCUIT DESIGN SOFTWARE WINDOWS DOWNLOAD
FREE CIRCUIT DESIGN SOFTWARE WINDOWS WINDOWS

To then restrict small fonts to RFSim99, I created a secondary user with ‘small font’ being selected. Iv) Another solution to the button anomaly: My problem with RFSim99 was solved by selecting small fonts. Solution place a high value resistor between the open end and ground. Iii) RFSim99 does not tolerate open ended stubs. Solution alter one of the impedance of one of the ports by a very small (insignificant) amount. Ii) When sweeping a transmission line between 50 Ohm ports, the display will sometimes go crazy. Solution save often and take care never to set the Smith Chart scale to ‘0’. I) RFSim99 has a fuse that blows when setting the scale of Smith charts to ‘0’ ! When this happens the input screen is obsoleted and you have to start afresh.

FREE CIRCUIT DESIGN SOFTWARE WINDOWS WINDOWS

Yes, it works on Windows 10! Some RFSim99 issues and workarounds, courtesy of ZS6GST You can’t beat free!Ĭheck out some screenshots from RFSim99 below: I can’t tell you how many filters I’ve designed roughly with RFSim99 that have found their way into commercial products after a little bit of hardware tweaking. Mild quirks aside, once up and running, RFSim99 is very easy to use, intuitive, and produces fast and accurate results (depending of course, on accurate input data! Garbage in = garbage out!). See below in the screenshot gallery for an example. Generally, they’re set to -40dB, so I generally just highlight the field, delete everything in the field, then type in -40dB (or whatever I want my lower limit to be) and hit enter. The lower scale limit fields are partially obscured. If you don’t want to do this, you can disable desktop composition in the Windows compatibility settings for the program:Īnother quirk can be found in the rectangular display. You can get them to appear by hovering your mouse pointer over them, clicking and holding the left button, and dragging the pointer around and over the buttons.

Sometimes some of the menu buttons (Simulate, Tune, and some others) fail to appear. There is a slight quirk with running RFSim99 in Windows 7, 8, 8.1, and 10. You will need to manually create a windows file association if you want RFSim99 to automatically open the *.cct files when double-clicked. Just extract this utility into a folder and run RFSim99.exe.

FREE CIRCUIT DESIGN SOFTWARE WINDOWS DOWNLOAD

I grabbed the files required for RFSim99 to run and created a standalone version which you can download below.

The RFSim99 installer package stopped working after Windows XP, and I’ve known people who have installed a Windows XP virtual machine in order to run the program, but you don’t have to do that. There are decent lists of other freeware RF simulation utilities here and here if you’re interested. Having said that, RFSim99 is handy if you want to design a basic filter, impedance match, resistive attenuator, or create/view 1 or 2 port S-parameter files. I should make it clear that it performs basic RF simulation only, and is nothing like Genesys/ADS, Microwave Office, Ansoft Designer, HFSS, or of that ilk, so if you want a full-on EM solver, this is not your program. RFSim99 is a freeware RF simulation software utility. I’ve been using RF sim 99 (aka RFSim99) for over a decade, and it’s proved invaluable again and again during that time, and continues to do so.

Free circuit design software windows