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
     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 before a new release of atlc is
     released.  Please, if you notice a problem with the documen-
     tation - 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 calcu-
     late 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 pro-
     gram), 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 infin-
     itely 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

     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.


     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 pro-
     duced 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.

     Print some extra data to stdout on the theoretical impedance
     of the structure. This is useful to compare with the numeri-
     cal result from atlc


     In the first example, a standard coupler is  created,  where

     eg1.  create_bmp_for_stripline_coupler   1.23  0.7  1.2  1.0
     eg2. create_bmp_for_stripline_coupler  -b  8  1.23  0.7  3.3
     eg3. create_bmp_for_stripline_coupler -v  12  1.23  0.7  4.8


     atlc(1)                       create_bmp_for_circ_in_circ(1)
     create_bmp_for_symmetrical_stripline(1)    design_coupler(1)
     find_optimal_dimensions_for_microstrip_coupler(1) readbin(1)                - Home page       - 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


     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 ver-
     sion.  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 PARTIC-
     ULAR  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 pro-
     gram. 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, Bos-
     ton, MA  02111-1307, USA.

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