Search found 70 matches

by PaulUK
Wed 22 Jan 2020, 11:01
Forum: Usage
Topic: Problems calculating characteristic impedance for Microstrip line
Replies: 11
Views: 1265

Re: Problems calculating characteristic impedance for Microstrip line

When you setup your mesh, do you have mesh lines on the edge of the metal strip or are you following the 1/3 2/3 rule? Although initially counter intuitive, you should not have mesh lines on the edge of planar tracks but have one line 1/3 of the mesh resolution inside the track and a mesh line 2/3 o...
by PaulUK
Sun 19 Jan 2020, 23:08
Forum: Usage
Topic: Problems calculating characteristic impedance for Microstrip line
Replies: 11
Views: 1265

Re: Problems calculating characteristic impedance for Microstrip line

Im not sure if this helps but if your track geometry is known and you store it in a variable, you can use that variable in the mesh definition and port definition that comes after the mesh and geometry setup. That way the port length should always correspond to the height of your track.

Paul
by PaulUK
Mon 02 Dec 2019, 01:58
Forum: Usage
Topic: Corrugated Horn Antenna Tutorial for openEMS
Replies: 0
Views: 1535

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: 1957

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: 1312

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: 1312

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: 1312

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: 1735

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: 1310

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: 1310

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.