o matter how
small delta becomes, h5topng produces nice graphics, that is, until delta
reaches zero. Then it produces an all black frame.
Why is that, and is that realistic or is it a bug somewhere? I suspect a bug.
Steve
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when I try to place
a dielectric resonator disc inside the cavity. So my question is,
"How do I specify a relationship between lattice cell size and Meep
characteristic length, meples?"
Thanks in advance for your kind assistance.
Steve
How do I edit or remove an erroneous post from the mailing list. h5topng works
quite well this morning. My problem last night must have had something to do
with scaling parts of my geometry outside the lattice.Steve
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??Mystery to me???Steve
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Dear Steven and Meep users,
It has been several days since I have been able to post. Issues have
accumulated.
1 - In my Meep model I am using a dielectric resonator made of
Polyethylene,
PE. High density PE has a dielectric constant = 2.3. across a broad
range of frequencies. Do I use this value
Dear Steven and Meep users,
The geometry for my case is a tapered cone (axis (1 0 0)). It is easy to
see from the PNG file whether or not the geometry resulting from (set!
symmetries (list (make ... is symmetric or not.
I have found that the geometry resulting from
(make mirror-sym (direction
I am trying to model a macro structure having overall dimensions ~ 0.3
meters which is also the RF wavelength (directly implying a lattice size
of 30x30) but including two planar structures of 50 microns thickness.
It seems that a high fidelity model of such structure is not possible in
Meep. Meep
methodology
to convert the parameters documented for copper at 2 GHz into dielectric
model for use with meep?
Thanks in advance for your consideration.
Steve
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ery helpful addition to the tutorial.
Steve Russell
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Force/Flux, but just how does one convert Flux and Force to
SI units? Isn't there an upper limit on force to be obtained from flux?
Thanks for your help.
Steve Russell
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systematically calculated
analytical solutions for cavity resonance up to TE 5,5 and TM 5,5, 60
frequency calculations. There are no analytical solutions for resonance
of this cavity below 2.45 GHz either TE or TM mode. Where should I look
next for resonance at 2.45 GHz from meep?
Steve
. If
necessary, I can provide a test control file to reproduce this
condition.
Steve
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epsilon
value in the .h5 file equals infinity for any significant thickness of
the metal. That confuses h5topng, so give it a max and min scale value.
Good luck,
Steve
On Wed, 2015-02-11 at 11:52 +, jim kurian wrote:
> Hello,
>
>
>
> I am new to Meep and I am facing problems
you,
Steve Russell
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powerful to use a very large lattice the
force/flux might go to zero. Is that expected? Can someone explain why
that happens?
Thank you,
Steve Russell
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On Mon, 2015-03-02 at 14:30 +, Mark Scullion wrote:
Mark,
You wrote,
> (set! pml-layers (list (make absorber (thickness 2 ; define PML
> layers
Don't you mean (* thickness 2) ? That is scheme syntax.
Steve
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Dear Steven and Meep users,
I need to discover how to shift a large number of objects in my lattice
but can't make it work so I have made a simple test file. Everything
runs just fine but the images from the eps.h5 file do not show any
shifting. Where is my error?
(set! geometry-lattice ( make l
m the
measurement data?
I have found that dissipation factor = loss tangent = power factor = 1/Q
but not how it relates to the complex coefficient in the above equation.
I'd be very grateful for a solution to this problem.
Steve
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ve or negative? This
question arises because I want to report force/flux, but I also want to
attach the correct sign. It seems that I should report the sign of the
force, using only the magnitude of the flux as the divisor, is that
right?
Thank you for your reply,
you for your kind assistance.
Steve
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equire my input?)
Thank you for any direction you might provide.
Steve
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to detect flux and force. You can also include the debug
code by changing the comments for the (set! geometry (list ...
Thank everyone for all the help I hope for.
Steve
;
; measure force/flux of a plane wave in free space.
;
; mpirun -np 4 meep-mpi-default ./plane-wave2.ctl
(reset-meep
for Q because
all of the lower frequencies give tiny values of force. I am hoping it
has something to do with the electric sources in the gaps. I don't think
they resonate because they are open to vacuum on one side with no
reflector.
Thanks for any ideas.
Steve
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someone has a custom source like that, would you mind sharing it
with me?
Steve
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Dear Steven and meep users,
I am creating a sequence of time-slice images and would like to use the
-R switch to set minimum and maximum color over all the data. I want to
see the evolution of the fields. This command,
h5topng -t 06 -0 -x -84 -S3 -R
-o ./Yang-Shell-side-ant-out/moviefiles-png/Ax
I need to see the decay of the fields in a resonant cavity excited with
a Gaussian source. (Bandwidth = 0.025 * center frequency) My thought
was:
(at-time 1 (set! amplitude 0)) which does not work. I tried
(define amp 1) with
(amplitude amp) in the sources list, then
(at-time 1 (set! amp 0)) whi
y))
(to-appended "ez" (at-every (* .1 T_meep) output-efield-z))
(to-appended "hx" (at-every (* .1 T_meep) output-hfield-x))
(to-appended "hy" (at-every (* .1 T_meep) output-hfield-y))
(to-appended "hz&q
P.S. It would be much cleaner for my application if I could use a
different output directory for each output interval, but that capability
is not even hinted in the reference manual. Is it possible?
On Tue, 2015-10-13 at 10:40 -0700, Steve wrote:
> Dear Steven and Meep users,
> I am making
Dear Steven and Meep users,
I am making truncated cone resonance cavities. I have been living with a
strange appearance of the cones which has now became a presentation
problem. It doesn't seem to affect the cavity resonance but it looks bad
when the image from Meep is projected on a slide.
I con
your kind assistance.
Steve
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Dear Steven and Meep users,
I want to simulate the fields from an LC circuit. Is it enough simply to
place two sources side by side, one excited by hz, the other by ez being
180 degrees out of phase?
Thanks,
Steve
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meep
You could make the first rod, then wrap a Scheme loop around it moving
the rod center at each cycle of the loop.
Steve
On Fri, 2016-01-01 at 02:39 +0530, Susovan Mandal wrote:
> Dear all,
> Can I use nested geometric-object-duplicates operation . How can I
> populate a 2 dimensiona
Hi,
I get that warning, too. My fix is:
export GUILE_WARN_DEPRECATED="no"
Issue at the terminal on start-up. ---which suppresses/removes that
annoying warning. (on Ubuntu)
Steve
On Tue, 2016-04-12 at 16:01 +, Pratik wrote:
> Hello Everyone,
> I am getting this error wh
.
mpirun has exited due to process rank 2 with PID 9773 on
node steve- exiting improperly. There are two reasons this could
occur:
1. this process did not call "init" before exiting, but others in
the job did. This can cause a job to hang indefinitely while it
wai
is
the value of I_o defined to equal 1 in meep?
Any advice or answers will be appreciated.
Regards,
Steve
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(exit), I suppose it would work if you use (quit) or perhaps even
if you just use the end of file for your exit. In any case, I still get
the stupid "mpirun has exited due to ... " message, but no other trash
and all of my data is outp
Yes, that seems to work. Where did I get the idea that it was
meep-all_wait instead of
meep-all-wait?
Whatever works, I hope this post clears up some confusion and serious
nuisance for others as discovering these commands has for me.
Steve
On Mon, 2016-09-05 at 20:43 -0700, Ardavan Oskooi
valid to use detectors inside the geometry?
Thanks for guidance,
Steve
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Hi,
Meep can be confusing sometimes. In this case, remember that meep is
case sensitive. The two commands, Set! and set! are not the same, Set!
doesn't work. See line two of your control file.
Steve
On Sat, 2016-10-08 at 13:04 +, Muhammad Hanif Ahmed Khan Khushik
wrote:
> Hi,
> I a
so, if you haven't already done so, I found that enabling
my editor's native ability to highlight matching parenthesis is almost
an essential need.
Good luck,
Steve
On Sat, 2016-10-08 at 13:04 +, Muhammad Hanif Ahmed Khan Khushik
wrote:
> Hi,
> I am trying to learn MEEP. I have jus
which enters conductivity as Meep frequency?
Steve
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e the next day?
Thanks for any advice,
Steve
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that will allow me to complete the Harminv run at the
end?
Steve
On Tue, 2016-11-15 at 11:00 -0800, Steve wrote:
> Dear Steven and Meep users,
>
> My problem is that I must shut-down my computer before my Harminv run
> completes. Is there any way to save the state of Meep/Harminv in
change the
source at the time of my choosing via "at-time time change-source."
Thank you for your consideration.
Steve
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Thanks,
I used:
(at-time (* (* cc T_meep) 0.4) (lambda () change-sources! SE-ant-
drive))
and it worked just fine.
Steve
On Thu, 2016-12-08 at 16:05 -0800, Ardavan Oskooi wrote:
> On 12/08/2016 03:36 PM, Steve wrote:
> >
> > I would like to change sources part way through a m
the time steps fall on a spacial boundary. At least it
seemed so to me.
Steve
On Fri, 2017-03-24 at 22:00 +0100, Thomas AUZINGER wrote:
> Hi all,
>
> When using the (at-time T step-functions ...) functionality, I run
> into
> problems when specifying a time T that is very clo
I had the same problem, but in my case I was able to change my scale
factor to a=1, which makes the meep calculations scaleable using the
calculated factors in the units conversion wiki.
Hope this helps,
Steve
On Sun, 2017-05-28 at 14:12 +, Sophia Fox wrote:
> Hello,
>
> Could anyone
ut-hfield-y))
(to-appended "hz" (at-every o-step output-hfield-z)
)
All feedback will be appreciated.
Thanks,
Steve
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Try this:
h5topng -z 10 -S4 -t 0:121 -R -Zc dkbluered ./research-out/ez.h5
That is, don't overlay the black eps data on top of the fields. The
fields are there, just masked by the overlay.
Steve
On Sat, 2017-06-10 at 14:38 +0700, friedr...@fornever.me wrote:
> Hello, dear Meep users
Thank you Sir:
I ran your example. It worked. I still have some ways to go in
understanding the details of relating it to my problem but a having a
working example is a big step toward understanding.
Again, Thank you for your help,
Steve
On Tue, 2017-06-13 at 22:00 -0700, Ardavan Oskooi wrote
estion is, "How do I
modify gaus-src to convert it to a function?"
Obviously my Scheme and C++ skills are weak, and I apologize for asking
what is basically a coding question of this forum, but any help anyone
may provide would be greatly appreciated.
Steve
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D="no"
;~$ time mpirun -np 3 -quiet meep-mpi ./Ardavan-post.ctl
;~$ h5topng -t 0:85 -0 -z 0 -S2 -R -c -dkbluered -o ./Ardavan-
out/Ezy.png ./Ardavan-out/hz.h5
;~$ convert ./Ardavan-out/hz.t*.png ./Ardavan-out/hz.gif
Thank you for your simple code example, it was very helpful.
Steve
On W
Maybe I didn't make my point clearly. This is a problem with the 3D
modeling, I don't make any claims one way or another regarding the
behavior of the 2D model.
I did run the modified code in both 2D and 3D, on two different
machines. The results were identical, machine to machine. They were
very
the change-source time which
will result in a low value of the scaler fields. Unfortunately, a
static field existing in the cavity has an effect on the behavior of
the fields created by the new antenna.
How does one submit a bug report?
Steve
On Mon, 2017-07-10 at 22:24 -0700, Steve
Hi,
I have a question about how to generate a Gaussian pulse train (with a
specified period) via meep? Thanks a lot.___
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that Tom pointed
to, which are needed to compile with libpng 1.6:
http://www.cs.cornell.edu/~srm/files/h5topngfix.patch
and can be applied by running
patch -p1 < h5topngfix.patch
in the h5utils-1.12.1 source directory.
I hope this helps!
Steve
_
ick to avoiding
this instability, other than trial and error?
Thanks in advance,
Steve
~~
Steven Byrnes
Physicist, Draper Laboratory, Cambridge, MA, USA
http://sjbyrnes.com/
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anks in advance!!!
~~Steve
PS: If it helps, I'm using python-meep on linux RHEL v7, freshly installed
via conda.
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work, and/or better ways to do
it? (I did find this thing
<http://meep-discuss.ab-initio.mit.narkive.com/DyEW5tL2/meep-frequency-snapshots-and-near-to-far-field-transform>
but
would rather not be messing with the source code and switching from python
to scheme.)
Thanks a lot in advance
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