Search found 144 matches

by Hale_812
Wed 23 Jan 2019, 00:53
Forum: Usage
Topic: FDTD Computation Time Estimation
Replies: 2
Views: 458

Re: FDTD Computation Time Estimation

it is hard because you don't know how the wave would propagate and where...
For sure you only know the time of excitation.
But you can check the evolution in ParaView during simulation and estimate using your expectations and path passed... i.e. "use the force, Luke"...
by Hale_812
Fri 18 Jan 2019, 01:00
Forum: Usage
Topic: Thirds Rule (FDTD Mesh Grid)
Replies: 14
Views: 1399

Re: Thirds Rule (FDTD Mesh Grid)

AFAIK 1/3 rule has meaning generally in PCB simulations. Probably, ONLY in pcb simulations. So first, there should be an agreement about layers for a tool to work. There is such tool: http://openems.de/forum/viewtopic.php?f=3&t=567 (I didn't try it myself, because it still needs some compiling and i...
by Hale_812
Fri 18 Jan 2019, 00:44
Forum: Usage
Topic: OpenEMS multi-processor performance
Replies: 20
Views: 11649

Re: OpenEMS multi-processor performance

t> but your post sounds very negative to me and I do not really like that. Please give constructive feedback I am commenting the discussion about "HFSS or Empire" you have started yourself t> If you have these kind of resources (money) it would make sense to think about a commercial FDTD solver (e.g...
by Hale_812
Thu 17 Jan 2019, 06:58
Forum: Usage
Topic: OpenEMS multi-processor performance
Replies: 20
Views: 11649

Re: OpenEMS multi-processor performance

Garias, let me express my scepticism about the configuration. It is exactly the configuration I always try to avoid. There are too many SLOW cores, and too little RAM, and channels per-core. This machine is good for fast repetitive solving of short equations, working with small chunks of huge data (...
by Hale_812
Thu 10 Jan 2019, 08:35
Forum: Usage
Topic: Multiport excitation with delay and attenuation. Best practices?
Replies: 0
Views: 656

Multiport excitation with delay and attenuation. Best practices?

As far as I remember, many ports can be excited in OpenEMS, with the same excitation signal. But how about delaying and attenuating the signal on per-port basis? Particularly, I am interested in driving an array of lumped ports attached to lambda/4 metal probes. Inserting a delaying structure, or a ...
by Hale_812
Wed 09 Jan 2019, 01:05
Forum: Development
Topic: Need large simulation models for Benchmarking
Replies: 4
Views: 631

Re: Need large simulation models for Benchmarking

Ok, I had three months simulating a 2x2x2 m space with Tx/Rx antennas and scattering objects. The goal was to analyze a performance of cm wave radar in transition from near to far field, as well as to see the evolution of reflected pulse depending on changing back-scattering conditions. It was reall...
by Hale_812
Wed 09 Jan 2019, 00:54
Forum: Usage
Topic: Volumetric data for Near Field Magnetic Field Strength (H)
Replies: 1
Views: 322

Re: Volumetric data for Near Field Magnetic Field Strength (H)

When you define a dump box, you define the data to be dumped, its file name, and storing format. Examine help AddDump() for details. It is quite a complete tool, as you can find, capable of dumping not only rough data, but also subsampling and even extracting a frequency domain components. Define se...
by Hale_812
Fri 04 Jan 2019, 06:09
Forum: Usage
Topic: Polar plot for Radiation Patern in dB format script is here
Replies: 4
Views: 1194

Re: Polar plot for Radiation Patern in dB format script is here

>Noob question:
you should refer to any linux forums, or man. in short, the latter is a better serviced envelope to the former. And the former itself is a satellite tool to apt. so the usage depends on how tricky you are in linux environment.
by Hale_812
Tue 25 Dec 2018, 02:05
Forum: Usage
Topic: KiCAD to OpenEMS (PCB export)
Replies: 8
Views: 1638

Re: KiCAD to OpenEMS (PCB export)

I do not use KiCAD much, but holding such tool in the pocket sounds great! I just want to ask, how does it create meshlines? using line-edge vertices, or taking 1/3 rule into account for every edge? in between the main coordinates, what distribution do you use? Can important vertex and main edge coo...
by Hale_812
Fri 21 Dec 2018, 00:55
Forum: Feedback
Topic: OpenEMS IRC Channel
Replies: 5
Views: 925

Re: OpenEMS IRC Channel

Human psychology. When you make it open and free, people try running it on Core2 with 4Gb.... and complain, that "it is raw and resource hungry, while some guy in the lab can make it in HFSS for me" When you sell it for 120 000, people tend to use 5-10% of that budget for presents, including a new g...