create_bmp_for_stripline_coupler - bitmap generator for coupler with thin
striplines between two infinitely wide groundplanes (part of
atlc)
create_bmp_for_stripline_coupler [-C] [-b bitmapsize] [-v] H w s Er
outputfile
This man page is not a complete set of documentation - the complexity of the
atlc project makes man pages not an ideal way to document it, although out of
completeness, man pages are produced. The best documentation that was current
at the time the version was produced should be found on your hard drive,
usually at
/usr/local/share/atlc/docs/html-docs/index.html
although it might be elsewhere if your system administrator chose to install the
package elsewhere. Sometimes, errors are corrected in the documentation and
placed at
http://atlc.sourceforge.net/ before a new release of atlc is
released. Please, if you notice a problem with the documentation - even
spelling errors and typos, please let me know.
create_bmp_for_stripline_coupler is a pre-processor for
atlc, the
finite difference program that is used to calculate the properties of a two
and three conductor electrical transmission lines of arbitrary cross section.
The program
create_bmp_for_stripline_coupler is used as a fast way of
generating bitmaps (there is no need to use a graphics program), for a pair of
1 pixel thick conductors of width w, spaced a distance s apart, inside a pair
of groundplanes of separation H. This has an exact analytical answer, when the
inner is infinitely thin and the overall width W is infinitely wide. This
theoretical impedance is calculated and printed to stderr if the -v option is
given on create_bmp_for_stripline_coupler's command line.
----------------------------------------------------- ^
| | |
| Er | |
| | |
| ----------- ----------- | H
| <----w----><--s--><----w----> | |
| | |
| | |
| | |
----------------------------------------------------- v
<-------------------------W------------------------->
The overall width W is calculated internally to be large enough that making it
any larger will have negligible effect on the results. The dielectric is
assumed that of vacuum.
The bitmaps produced by
create_bmp_for_stripline_coupler are 24-bit bit
colour bitmaps, as are required by
atlc.
-C
Print the full copyright information and exit.
-b bitmapsize
is used to set the size of the bitmap, and so the accuracy to which atlc is able
to calculate the coupler's properties. The default value for 'bitmapsize' is
normally 18 although this can be set at compile time. (see
'DEFAULT_COUPLER_BITMAP_SIZE' in definitions.h). The value can be set anywhere
from 6 to 28. The size of bitmap produced will be between 2^(bitmapsize-1) and
2^(bitmapsize+1), so if its set to 28 the bitmap could be as big as 512 Mb,
which would take an eternity to compute.
-v
Print some extra data to stdout on the theoretical impedance of the structure.
This is useful to compare with the numerical result from
atlc
In the first example, a standard coupler is created, where the
eg1. create_bmp_for_stripline_coupler 1.23 0.7 1.2 1.0 coupler.bmp
eg2. create_bmp_for_stripline_coupler -b 8 1.23 0.7 3.3 small.bmp
eg3. create_bmp_for_stripline_coupler -v 12 1.23 0.7 4.8 theory.bmp
atlc(1) create_bmp_for_circ_in_circ(1) create_bmp_for_circ_in_rect(1)
create_bmp_for_microstrip_coupler(1) create_bmp_for_rect_cen_in_rect(1)
create_bmp_for_rect_cen_in_rect_coupler(1) create_bmp_for_rect_in_circ(1)
create_bmp_for_rect_in_rect(1) create_bmp_for_symmetrical_stripline(1)
design_coupler(1) find_optimal_dimensions_for_microstrip_coupler(1) readbin(1)
http://atlc.sourceforge.net - Home page
http://sourceforge.net/projects/atlc - Download area
atlc-X.Y.Z/docs/html-docs/index.html - HTML docs
atlc-X.Y.Z/docs/qex-december-1996/atlc.pdf - theory paper
atlc-X.Y.Z/examples - examples
Dr. David Kirkby PhD, drkirkby at ntlworld.com
Copyright (c) 2002 Dr. David Kirkby.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version. This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details. You should have received a copy of the GNU General Public License (in
the file COPYING) along with this program. You may get a full copy of it by
running the program with the -C option. Otherwise you can write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.