Search found 8 matches

by n4es
Thu 10 Oct 2019, 01:52
Forum: Install
Topic: Building on Ubuntu, current Git source
Replies: 6
Views: 16687

Re: Building on Ubuntu, current Git source

Off topic, sorry, but I deleted everything and reinstalled in Windows and now antenna patterns are good. Thanks!
by n4es
Thu 10 Oct 2019, 00:21
Forum: Install
Topic: Building on Ubuntu, current Git source
Replies: 6
Views: 16687

Re: Building on Ubuntu, current Git source

v0.0.36 for Ubuntu would be very much appreciated. Since I upgraded to Linux Mint 19.2, I'm down. Running in Windows now... Unable to see antenna patterns in Windows. Tried fixing setup.m file per the forum, but no good.
by n4es
Sat 21 Jul 2018, 17:42
Forum: Usage
Topic: Which hardware for openEMS?
Replies: 24
Views: 25684

Re: Which hardware for openEMS?

I ran more simulations with a larger model: 3-pole cavity band-pass filter with a fine mesh, 3.37 MCells. Both the i5 and i7 were fastest using 3 cores. The Linux Mint 18.3 advantage over Windows 8.1 was less with the larger model, probably because the Windows background tasks were stealing a lower ...
by n4es
Thu 12 Jul 2018, 17:47
Forum: Usage
Topic: Which hardware for openEMS?
Replies: 24
Views: 25684

Re: Which hardware for openEMS?

Hale_812: Thank you for the information. I have 32 GB of non-ECC DDR3 1600 MHz RAM now on the i7-4790. It appears that an unlocked i7-8700K or i7-8086K with 3200 MHz DDR4 would nearly double my performance. You mentioned that an unlocked CPU motherboard would use non-ECC RAM. Regarding buffered/ECC ...
by n4es
Tue 03 Jul 2018, 04:32
Forum: Usage
Topic: Which hardware for openEMS?
Replies: 24
Views: 25684

Re: Which hardware for openEMS?

I ran the same simulation on the same machine (i7-4790 @ 3.6 GHz) in Windows 8.1 and Linux Mint 18.3 (dual-boot). Windows 8.1 => 70.4 MC/s Linux Mint 18.3 => 106.1 MC/s Factor is 1.51/1 for LM 18.3 vs. Win 8.1. I expect the poor Windows results partially reflect Norton, Malwarebytes, and other backg...
by n4es
Mon 18 Jun 2018, 18:45
Forum: Usage
Topic: Using Lumped Ports
Replies: 3
Views: 4698

Re: Using Lumped Ports

I found that I can use short coaxial ports (1-inch) at 300 MHz if I use a fine mesh: mesh_res = c0/(f0+fc)/unit/500. I am now getting good agreement between stripline z0 and coaxial port z0 when looking at a quarter-wave stripline. Seeing 1.11:1 maximum VSWR, or 1.05:1 ratio between coaxial port z0 ...
by n4es
Wed 13 Jun 2018, 17:41
Forum: Usage
Topic: Using Lumped Ports
Replies: 3
Views: 4698

Re: Using Lumped Ports

Thorsten, Thank you for the quick reply and the suggestion. What I am using now is very similar, but using the coaxial port. I usually work down at UHF, so the transmission line based ports working against the PML_8 get rather long. It may not be possible, but I was hoping to be able to save volume ...
by n4es
Tue 12 Jun 2018, 22:02
Forum: Usage
Topic: Using Lumped Ports
Replies: 3
Views: 4698

Using Lumped Ports

I am new to openEMS, and not much of a programmer. I have successfully simulated a 3-pole interdigital cavity band pass filter and a simple stripline transmission line stack-up with pads at the ends, using Coaxial Ports. I used the pipecap filter simulation with Coaxial Ports as a template for input...