--- /dev/null
+/* atlc - arbitrary transmission line calculator, for the analysis of
+transmission lines are directional couplers.
+
+Copyright (C) 2002. Dr. David Kirkby, PhD (G8WRB).
+
+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 package_version 2
+of the License, or (at your option) any later package_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
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+USA.
+
+Dr. David Kirkby, e-mail drkirkby at gmail.com
+
+*/
+
+#include "config.h"
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#include "definitions.h"
+#include "exit_codes.h"
+
+void usage_find_optimal_dimensions_for_microstrip_coupler(void)
+{
+ fprintf(stderr,"Usage: find_optimal_dimensions_for_microstrip_coupler [-s smin] [-S smax] [-t sstep] [-w wmin] [-W wmax] [-x wstep] [-g gmin] [-G GMAX] [-i gstep] h t Er1 Er2 Zodd_required Zeven_required output_filename\n\n");
+ fprintf(stderr,"Version %s\n",PACKAGE_VERSION);
+ fprintf(stderr,"where h and t are all, in mm, all in inches or all in ..; Zodd_required and Zeven are in Ohms\n");
+ fprintf(stderr,"(they *must* use the same units. Non-integers allowed for all parameters)\n");
+ fprintf(stderr,"Options are:\n");
+ fprintf(stderr," -C Print copyright, licencing and distribution information.\n");
+ /*fprintf(stderr," -b bmp_size Sets the size of the bitmap used by 'atlc', in the range 1 to 15 (default %d).\n",DEFAULT_BMP_SIZE); */
+ fprintf(stderr," -s gmin Sets the minimum gap between the two coupled lines (default = %f)\n", DEFAULT_SMIN);
+ fprintf(stderr," -s gmax Sets the maximum gap between the two coupled lines (default = %f)\n", DEFAULT_SMAX);
+ fprintf(stderr," -i gstep Sets the stepsize used for interations between gmin and gmax (default = %f)\n", DEFAULT_SSTEP);
+ fprintf(stderr," -g gmin Sets the minimum gap between the coupled lines and the groundplane (default = %f)\n", DEFAULT_GMIN);
+ fprintf(stderr," -G gmax Sets the maximum gap between the coupled lines and the groundplane (default = %f)\n", DEFAULT_GMAX);
+ fprintf(stderr," -i gmin Sets the stepsize used between gmain and max (default = %f)\n", DEFAULT_GSTEP);
+ fprintf(stderr," -w wstep Sets the minimum width of the coupled lines (default = %f)\n", DEFAULT_WMIN);
+ fprintf(stderr," -W Wstep Sets the maximum width of the coupled lines (default = %f)\n", DEFAULT_WMAX);
+ fprintf(stderr," -x Wstep Sets the stepsize used between wmin and wmax (default = %f)\n", DEFAULT_WSTEP);
+ fprintf(stderr,"GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG ^\n");
+ fprintf(stderr,"G G |\n");
+ fprintf(stderr,"G G |\n");
+ fprintf(stderr,"G Dielectric, permittivity=Er1 (usually 1.0) G |\n");
+ fprintf(stderr,"G G |\n");
+ fprintf(stderr,"G c's denonte the copuled transmission lines of width w. G |\n");
+ fprintf(stderr,"G t is the thickness of the copper of the PCB (typically 0.035 mm) G |\n");
+ fprintf(stderr,"G h is the thickness of the dielectric ( ~1.593 mm for 1.6 mm PCB) G |\n");
+ fprintf(stderr,"G | g is the gap between the coupled lines and the groundplane. G |\n");
+ fprintf(stderr,"G | s is the spacing between the two coupled lines. G |\n");
+ fprintf(stderr,"G | This is NOT drawn to scale (W and H are shown far too small ) G H\n");
+ fprintf(stderr,"G | G |\n");
+ fprintf(stderr,"G v <--g--><--w--><----s----><--w--><--g--> G |\n");
+ fprintf(stderr,"GGGGGGGGGGGGGGGGGGG ccccccc ccccccc GGGGGGGGGGGGGGG |\n");
+ fprintf(stderr,"GGGGGGGGGGGGGGGGGGG.......ccccccc...........ccccccc.......GGGGGGGGGGGGGGG |\n");
+ fprintf(stderr,"G.^................................................^....................G |\n");
+ fprintf(stderr,"G.|................................................|....................G |\n");
+ fprintf(stderr,"G.|t........Dielectric, permittivity=Er2...........h....................G |\n");
+ fprintf(stderr,"G.|............(3.7 for FR4 PCB)...................|....................G |\n");
+ fprintf(stderr,"G..................................................V....................G |\n");
+ fprintf(stderr,"GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG |\n");
+ fprintf(stderr,"GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG. v\n");
+ fprintf(stderr,"<-----------------------------------W----------------------------------->\n\n");
+ fprintf(stderr,"E.g. \nfind_optimal_dimensions_for_microstrip_coupler 1.593 0.035 1 3.7 15 180 best.txt\n\n");
+ exit_with_msg_and_exit_code("",PROGRAM_CALLED_WITH_WRONG_NUMBER_OF_ARGUMENTS);
+}