Search found 68 matches

by PaulUK
Mon 02 Dec 2019, 01:58
Forum: Usage
Topic: Corrugated Horn Antenna Tutorial for openEMS
Replies: 0
Views: 616

Corrugated Horn Antenna Tutorial for openEMS

I have written a tutorial called, A Comprehensive Corrugated Horn Generator and Simulation with openEMS. It is based on the article "Design of Corrugated Horns: A Primer" that appeared in the IEEE Antennas and Propagation Magazine in 2005 and can be found on the internet. References included in the ...
by PaulUK
Fri 29 Nov 2019, 14:32
Forum: Usage
Topic: [solved] Very basic but can't get it to work: simple MSL sim does not converge
Replies: 5
Views: 1312

Re: [solved] Very basic but can't get it to work: simple MSL sim does not converge

This might be a silly question but was the animated gif made from within ParaView?
by PaulUK
Thu 07 Nov 2019, 14:42
Forum: Usage
Topic: Symmetry planes for horn antenna
Replies: 3
Views: 865

Re: Symmetry planes for horn antenna

I repeated the simulation with the full mesh and made sure that all planes for the nf2ff box are included (set to 1) with all boundaries set to PML_8. I left the CalcNF2FF symmetry plane on normal to the x axis with 'Mirror', {0, 'PEC', 0}. Just one symmetey plane for now. This time the patterns loo...
by PaulUK
Sun 03 Nov 2019, 23:21
Forum: Usage
Topic: Symmetry planes for horn antenna
Replies: 3
Views: 865

Re: Symmetry planes for horn antenna

Hello Thorsten,
Thanks for looking into it. I'll try what you suggest. So if I understand correctly, I simulate the whole model as usual but then to implement the mirrror planes in the nf2ff function and check the patterns?
by PaulUK
Wed 09 Oct 2019, 14:21
Forum: Usage
Topic: Symmetry planes for horn antenna
Replies: 3
Views: 865

Symmetry planes for horn antenna

I have written an indepth tutorial for the design of corrugated horn antennas and how they can be simulated with openEMS, and it was suggested that I show how symmetry planes can be used to reduce the size and time for the simulation. To begin with I just wanted to add a PEC wall normal to the x axi...
by PaulUK
Wed 09 Oct 2019, 14:04
Forum: Usage
Topic: Monopole on an "Infinite" Ground-plane issue
Replies: 6
Views: 1323

Re: Monopole on an "Infinite" Ground-plane issue

Thanks. I added the arguement 'Mode', 1, and it worked. Now the radiation patterns look like a dipole.
by PaulUK
Fri 04 Oct 2019, 14:07
Forum: Usage
Topic: Energy issues and warnings using caoxial port
Replies: 3
Views: 1061

Re: Energy issues and warnings using caoxial port

Can a PEC end cap be used at the end of a coax transmission line and have the port at the coax-PEC endcap plane, in a similar way as can be done with waveguide?
by PaulUK
Fri 04 Oct 2019, 13:34
Forum: Usage
Topic: Energy issues and warnings using caoxial port
Replies: 3
Views: 1061

Re: Energy issues and warnings using caoxial port

I just deleted a reply because I misread your boundary conditions. Have you tried to cap the ends of the coax with a PEC cylinder? Im taking a look at your model and if I can figure out the problem I'll post later.
by PaulUK
Sat 21 Sep 2019, 23:32
Forum: Usage
Topic: Monopole on an "Infinite" Ground-plane issue
Replies: 6
Views: 1323

Re: Monopole on an "Infinite" Ground-plane issue

Yes, with an infinite ground plane the monopole looks like a dipole, but would yield a farfield that looks like the top half of a dipole's farfield pattern. I made some changes to the CalcNF2FF arguments and the theta range but running into problems. I get the error: data mismatch between read and r...
by PaulUK
Sat 21 Sep 2019, 13:47
Forum: Usage
Topic: Monopole on an "Infinite" Ground-plane issue
Replies: 6
Views: 1323

Re: Monopole on an "Infinite" Ground-plane issue

That sounds exactly like what's happening. Thank you, I'll look into the usage to see how its done. I'll post it as a tutorial once I get it to work. Thanks, Thorsten.

Paul