Search found 79 matches

by PaulUK
Sat 21 Sep 2019, 13:47
Forum: Usage
Topic: Monopole on an "Infinite" Ground-plane issue
Replies: 6
Views: 5302

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
by PaulUK
Sat 21 Sep 2019, 10:07
Forum: Usage
Topic: Monopole on an "Infinite" Ground-plane issue
Replies: 6
Views: 5302

Monopole on an "Infinite" Ground-plane issue

I am trying to simulate a simple monopole antenna on an infinite ground-plane. The negative z boundary is set to PEC with all other boundaries set to PML_8. A lumped port is put between the z=0 plane (plane of the PEC ground plane) and the bottom of the monopole. The S-parameters look fine and compa...
by PaulUK
Sat 21 Sep 2019, 09:56
Forum: Usage
Topic: Primitive Translation and Detect Edges Function
Replies: 3
Views: 3337

Re: Primitive Translation and Detect Edges Function

I've not come across this yet but could it be something to do with the model and translation units?
by PaulUK
Tue 09 Jul 2019, 21:45
Forum: Usage
Topic: Non-parallel geometries not converging
Replies: 1
Views: 2073

Re: Non-parallel geometries not converging

As I understand it, ports need to be defined as inline with the coordinate system/mesh. So there needs to be a parallel section of transmission line or waveguide between the port's start and stop coordinates. Hope that helps.
by PaulUK
Mon 28 Jan 2019, 21:43
Forum: Usage
Topic: Thirds Rule (FDTD Mesh Grid)
Replies: 14
Views: 10656

Re: Thirds Rule (FDTD Mesh Grid)

Thanks Thorsten, Yes that makes sense. I'm working towards some coupled line couplers. The two varieties im considering are stepped line and the other is a continuously tapering line. So based on your explaination I would use the thirds rule for the stepped line coupler, where the lines are rectangu...
by PaulUK
Mon 28 Jan 2019, 20:49
Forum: Usage
Topic: Thirds Rule (FDTD Mesh Grid)
Replies: 14
Views: 10656

Re: Thirds Rule (FDTD Mesh Grid)

Does anyone know if there is a disadvantage to use the thirds rule in addition to the mesh lines lying on the edges? Is the accuracy degraded if this is done?
by PaulUK
Mon 07 Jan 2019, 13:49
Forum: Usage
Topic: CSRR on patch antenna
Replies: 8
Views: 6783

Re: CSRR on patch antenna

Did you manage to get it to work properly? I've not had any luck yet despite checking the port and priorities of the physical elements.
by PaulUK
Fri 04 Jan 2019, 13:37
Forum: Usage
Topic: Parabolic Reflector Antenna Tutorial/Example
Replies: 5
Views: 4748

Re: Parabolic Reflector Antenna Tutorial/Example

I have updated the files in the zipped folder, the far field files are more manageable. I used the 'OptResolution' option to achieve this using "max_res*2". The total size of 'tmp' is now 2.75 Gb.

By using "max_res*4", the 'tmp' folder will be around 815 Mb.
by PaulUK
Thu 03 Jan 2019, 19:58
Forum: Usage
Topic: Parabolic Reflector Antenna Tutorial/Example
Replies: 5
Views: 4748

Re: Parabolic Reflector Antenna Tutorial/Example

It was posted in this thread:

viewtopic.php?f=3&t=631
by PaulUK
Thu 03 Jan 2019, 15:29
Forum: Usage
Topic: Parabolic Reflector Antenna Tutorial/Example
Replies: 5
Views: 4748

Re: Parabolic Reflector Antenna Tutorial/Example

The plotFFcocx.m file is included in the Windows download, perhaps its missing in the Linux package? It was originally posted by Bruce Veidt on the forum. I have included it in the zipped file for users who are missing it. This file should be copied to the openEMS/matlab folder. It's a modification ...