>>>>>"It will be very nice to have such a tool where you can predict the EM radiation for a product design that is only on paper. That way you can optimize your design to meet your criteria without the need of physically changing the model."
Hi, Yes, wouldn't that be nice?;-). There are a number of companies that have products that advertise to have products that can help you with these simulations. I believe that Ansoft and Quad two such companies. The last time I checked into modelling software was about 1-1/2 years ago. My conclusion at the time was that it may be useful to model relatively small, easily defined problems. For example, if one had a small subsystem on a PCB that was very suspect to the the cause of a problem (crosstalk between two transmission line structures, radiation from a chip/heatsink package, ground structure in an I/O circuit, ground or power plance bounce on a PCB, etc), then one may be able to model the small structure with commercially available 3D modeling software, and then make changes to do "what if" analysis. There are a number of reasons why the current state of the art does not address large complex systems with I/O cabling very effectively. I believe that they are YEARS away from giving us a tool that we can use effectively on large systems with I/O cables. But since I do not want to misrepresent the experts, perhaps you should contact them. I believe Professor Todd Hubing at the University of Missouri-Rolla (UMR) works spcifically with numerical modeling techniques with the focus on EMC. I'm sure he is knowlegable on the current state of the art in this area. I also believe that UMR was working with at least one commercial software company in developing/improvingthese tools for practical applications. I don't know if this is still in process. Perhaps you can contact UMR to determine what they feel can be reasonably expected from commercially available programs at this time. It is better to get an objective opinion than a promise from a company that is trying to sell you a $50,000 software package. Good Luck. [email protected] ---------- From: Sarmad_Albanna To: EMC & Safety Forum Subject: EMC Simulator List-Post: [email protected] Date: Thursday, April 03, 1997 1:21PM Hello everybody, I have been looking for a software that can do EMI/ EMC simulation for a 3D structure. Is there any software that can handle a little more complex structures like a box with different size openings, I would imagine that this software would need an input info. like: The material of the box, the shielding layers, the PCB wiring diagram, the components layout on the board, and the other detailed parameters that should follow. I have already checked out a product made by HP called HFSS which is quite powerful except it might not be very accurate and/or fast to handle large structures ( such as a10" X 5"X3" volume sizes). It will be very nice to have such a tool where you can predict the EM radiation for a product design that is only on paper. That way you can optimize your design to meet your criteria without the need of physically changing the model. Please let me know if anyone has any info. Thank you very much. Sarmad Albanna
