NAME

       create_bmp_for_stripline_coupler  -  bitmap  generator  for  coupler  with thin striplines
       between two infinitely wide groundplanes (part of atlc)

SYNOPSIS

       create_bmp_for_stripline_coupler [-C] [-b bitmapsize] [-v] H w s Er outputfile

WARNING

       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.

DESCRIPTION

       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.

OPTIONS

       -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

EXAMPLES

       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

SEE ALSO

       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

AUTHOR

       Dr. David Kirkby PhD, drkirkby at ntlworld.com

COPYRIGHT

       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.