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Old July 28th 17, 06:12 PM posted to uk.radio.amateur,rec.radio.amateur.antenna
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http://hackaday.com/2017/07/28/opene...ely-difficult/

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Old July 28th 17, 07:39 PM posted to uk.radio.amateur,rec.radio.amateur.antenna
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In message , Gareth's Downstairs Computer
writes


http://hackaday.com/2017/07/28/opene...ic-field-solvi
ng-merely-difficult/


Looks interesting. I might even be able to model yagi boom effects.

I tried the waveguide tutorial , but the matlab scripting front end
fails. The constant c0 ( speed of light) was missing and the FDTD line
borks.

??? Undefined function or method 'InitFDTD' for input arguments of type
'char'.

Error in == ems_waveguide at 41
FDTD = InitFDTD('NrTS',1e4, 'OverSampling', 5);

I'm running an old Matlab R2010b and I know later Matlab versions aren't
backward compatible.

Maybe Octave ( which is free) would be better. Upgrading Matlab is
expensive.

Brian


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Old July 28th 17, 09:32 PM posted to uk.radio.amateur,rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Mar 2017
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On 28/07/2017 19:39, Brian Howie wrote:
In message , Gareth's Downstairs Computer
writes


http://hackaday.com/2017/07/28/opene...ic-field-solvi
ng-merely-difficult/


Looks interesting. I might even be able to model yagi boom effects.

I tried the waveguide tutorial , but the matlab scripting front end
fails. The constant c0 ( speed of light) was missing and the FDTD line
borks.

??? Undefined function or method 'InitFDTD' for input arguments of type
'char'.

Error in == ems_waveguide at 41
FDTD = InitFDTD('NrTS',1e4, 'OverSampling', 5);

I'm running an old Matlab R2010b and I know later Matlab versions aren't
backward compatible.

Maybe Octave ( which is free) would be better. Upgrading Matlab is
expensive.


Apologies, didn't note the Matlab dependency.

Only use Matlab once when at Nokia to analyse the world-wide production
looking for bugs in the test software, Cpk, 6 sigma and all that.


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Old July 29th 17, 11:22 AM posted to uk.radio.amateur,rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jul 2006
Posts: 106
Default May be of interest?

In message , Gareth's Downstairs Computer
writes
On 28/07/2017 19:39, Brian Howie wrote:
In message , Gareth's Downstairs Computer
writes


http://hackaday.com/2017/07/28/opene...ic-field-solvi
ng-merely-difficult/

Looks interesting. I might even be able to model yagi boom effects.
I tried the waveguide tutorial , but the matlab scripting front end
fails. The constant c0 ( speed of light) was missing and the FDTD
line borks.
??? Undefined function or method 'InitFDTD' for input arguments of
type 'char'.
Error in == ems_waveguide at 41
FDTD = InitFDTD('NrTS',1e4, 'OverSampling', 5);
I'm running an old Matlab R2010b and I know later Matlab versions
aren't backward compatible.
Maybe Octave ( which is free) would be better. Upgrading Matlab is
expensive.


Apologies, didn't note the Matlab dependency.

Only use Matlab once when at Nokia to analyse the world-wide production
looking for bugs in the test software, Cpk, 6 sigma and all that.



It's good for array and matrix manipulation. I used it extensively at
work for image processing. The later toolboxes include Software Defined
Radio blocks, but at 1800 for the latest version, it would be a bit
extravagant.

Scilab does much the same as Matlab, and Octave as mentioned, but I
don't know a great deal about that one.

Brian
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Brian Howie
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Old July 29th 17, 02:59 PM posted to uk.radio.amateur,rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jul 2006
Posts: 106
Default May be of interest?

On Fri, 28 Jul 2017 21:32:39 +0100, Gareth's Downstairs Computer
wrote:

On 28/07/2017 19:39, Brian Howie wrote:
In message , Gareth's Downstairs Computer
writes


http://hackaday.com/2017/07/28/opene...ic-field-solvi
ng-merely-difficult/


Looks interesting. I might even be able to model yagi boom effects.

I tried the waveguide tutorial , but the matlab scripting front end
fails. The constant c0 ( speed of light) was missing and the FDTD line
borks.

??? Undefined function or method 'InitFDTD' for input arguments of type
'char'.

Error in == ems_waveguide at 41
FDTD = InitFDTD('NrTS',1e4, 'OverSampling', 5);

I'm running an old Matlab R2010b and I know later Matlab versions aren't
backward compatible.

Maybe Octave ( which is free) would be better. Upgrading Matlab is
expensive.


Apologies, didn't note the Matlab dependency.

Only use Matlab once when at Nokia to analyse the world-wide production
looking for bugs in the test software, Cpk, 6 sigma and all that.


I got it to run on Matlab. It was a path setting problem . RTFI
applies. ;-0

ran the waveguide and patch antenna tutorials ok, but the helical
antenna seems to be taking a while.

Cheers

Brian

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