create_bmp_for_rect_in_rect(1)				      General Commands Manual				    create_bmp_for_rect_in_rect(1)

NAME

       create_bmp_for_rect_in_rect - bitmap generator for rectangular conductor inside rectangular conductor (part of atlc)

SYNOPSIS

       create_bmp_for_rect_in_rect [options... ] W H a b c d w h Er1 Er2 filename.bmp

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_rect_in_rect  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 line of arbitrary cross section. The program create_bmp_for_rect_in_rect is used as a fast  way
       of  generating  bitmaps	(there is no need to use a graphics program), for a rectangular conductor inside a rectangular conductor, with two
       dieletrics, like this:

       -----------------------------------------------------  ^
       |						   |  |
       |     <--------------d------------------->	   |  |
       |						   |  |
       |	 <----------w----------->		   |  |
       |	 ------------------------   ^		   |  |
       |	 |			|   |		   |  |
       |	 |  Metallic conductor	|   |		   |  H
       |<----b-->|  conductor (can be	|   c	Er1	   |  |
       |	 |  off-centre) 	|   |		   |  |
       |	 |			|   |		   |  |
       |     ------------------------------------ ^	   |  |
       |     |..................................| |	   |  |
       |     |...Dielectric, permittivity=Er2...| |	   |  |
       |<-a->|.....(can be off centre ).........| h	   |  |
       |     |..................................| |	   |  |
       |     |..................................| |	   |  |
       -----------------------------------------------------  |
       <---------------------------W----------------------->

       The parameters 'W' and 'H' and the inner dimensions of the outer conductor.  The outer dimensions of the inner conductor are 'w'  and  'c'.
       The  inner  conductor  is  assumed to rest on a dielectric (Er2) which is 'd' wide and outer conductor an the inner conductor is offset 'b'
       from the left hand sidewall of the outer conductor. The whole region is surrounded by a dielectric  of  relative  permittivity  'Er1'.  The
       dielectrics 'Er1' and then 'Er1' and 'Er2' will both be 1.0

       The bitmap is printed to the file specifiled as the last argument

       create_bmp_for_rect_in_rect -f filename.bmp W H a b c d w h Er1 Er2

       The bitmaps produced by create_bmp_for_rect_in_rect are 24-bit bit colour bitmaps, as are required by atlc.

       The  permittivities  of	the  bitmap,  set by 'Er1' and 'Er2', determine the colours in the bitmap. If Er1 or Er2 is 1.0, 1.0006, 2.1, 2.2,
       2.33, 2.5, 3.3, 3.335, 3.7, 4.8, 10.2 or 100, then the colour corresponding to that permittivity will  be  set  according  to  the  colours
       defined	in COLOURS below. If Er1 is not one of those permittivities, the region of permittivity Er1 will be set to the colour 0xCAFF00. If
       Er2 is not one of those values, then the region of the image will be set to the colour 0xAC82AC. The program atlc does not know what  these
       permittivites are, so they atlc, must be told with the comand line option -d, as in example 4 below.

OPTIONS

       -b bitmapsize
       is  used  to  set  the  size  of the bitmap, and so the accuracy to which atlc is able to calculate the transmission line's properties. The
       default value for 'bitmapsize' is normally 4, although this is set at compile time. The value can be set anywhere from 1 to  15,  but  more
       than 8 is probably not sensible.

       -f outfile
       Set  the  output  filename.  By	default,  the bitmap is sent to stdout, but it *must* be sent to a file, with this option, or as described
       above.

       -v
       Causes create_bmp_for_rect_in_rect to print some data to stderr. Note, nothing extra goes to standard output, as that  is  expected  to	be
       redirected to a bitmap file.

COLOURS

       The  24-bit bitmaps that atlc expects, have 8 bits assigned to represent the amount of red, 8 for blue and 8 for green. Hence there are 256
       levels of red, green and blue, making a total of 256*256*256=16777216 colours.  Every one of the possible 16777216 colours can  be  defined
       precisely by the stating the exact amount of red, green and blue, as in:

       red	   = 255,000,000 or 0xff0000
       green	   = 000,255,000 or 0x00ff00
       blue	   = 000,000,255 or 0x0000ff
       black	   = 000,000,000 or 0x000000
       white	   = 255,255,255 or 0xffffff
       Brown	   = 255,000,255 or 0xff00ff
       gray	   = 142,142,142 or 0x8e8e8e

       Some  colours,  such as pink, turquoise, sandy, brown, gray etc may mean slightly different things to different people. This is not so with
       atlc, as the program expects the colours below to be EXACTLY defined as given. Whether you feel the colour is sandy or yellow is up to you,
       but  if you use it in your bitmap, then it either needs to be a colour recognised by atlc, or you must define it with a command line option
       (see OPTIONS and example 5 below).
       red    = 255,000,000 or 0xFF0000 is the live conductor.
       green  = 000,255,000 or 0x00FF00 is the grounded conductor.
       blue   = 000,000,000 or 0x0000FF is the negative conductor

       All bitmaps must have the live (red) and grounded (green) conductor. The blue conductor is not currently supported, but it will be used	to
       indicate a negative conductor, which will be needed if/when the program gets extended to analyse directional couplers.

       The following dielectrics are recognised by atlc and so are produced by create_bmp_for_rect_cen_in_rect.

       white	 255,255,255 or 0xFFFFFF as Er=1.0    (vacuum)
       pink	 255,202,202 or 0xFFCACA as Er=1.0006 (air)
       L. blue	 130,052,255 or 0x8235EF as Er=2.1    (PTFE)
       Mid gray  142,242,142 or 0x8E8E8E as Er=2.2    (duroid 5880)
       mauve	 255.000,255 or 0xFF00FF as Er=2.33  (polyethylene)
       yellow	 255,255,000 or 0xFFFF00 as Er=2.5    (polystyrene)
       sandy	 239,203,027 or 0xEFCC1A as Er=3.3    (PVC)
       brown	 188,127,096 or 0xBC7F60 as Er=3.335  (epoxy resin)
       Turquoise 026,239,179 or 0x1AEFB3 as Er=4.8    (glass PCB)
       Dark gray 142,142,142 or 0x696969 as Er=6.15   (duroid 6006)
       L. gray	 240,240,240 or 0xDCDCDC as Er=10.2  (duroid 6010)
       D. orange 213,160,067 or 0xD5A04D as Er=100.0 (mainly for test purposes)

EXAMPLES

       Here  are  a  few  examples  of	the  use  of  create_bmp_for_rect_in_rect.  Again,  see  the  html  documentation in atlc-X.Y.Z/docs/html-
       docs/index.html for more examples.

       In the first example, there is just an air dielectric, so Er1=Er2=1.0.  The inner of 1x1 inches (or mm, miles etc) is placed  centrally	in
       an outer with dimensions 3 x 3 inches.

       The exact place where the dielectric starts (a) and its width (d) are unimportant, but they must still be entered.

       % create_bmp_for_rect_in_rect 3 3 1 1 1 1 1 1 > ex1.bmp
       % atlc ex1.bmp

       In this second example, an inner of 15.0 mm x 0.5 mm is surrounded by an outer with internal dimensions of 61.5 x 20.1 mm. There is a mate-
       rial with permittivity 2.1 (Er of PTFE) below the inner conductor. The output from create_bmp_for_rect_in_rect is sent to a  file  ex1.bmp,
       which is then processed by atlc

       % create_bmp_for_rect_in_rect 61.5 20.1 5 22 0.5 50 15 5 1.0 2.1 > ex2.bmp
       % atlc ex2.bmp

       In  example  3,	the  bitmap  is  made  larger,	to  increase  accuracy,  but  otherwise  this  is identical to the second example.  % cre-
       ate_bmp_for_rect_in_rect -b7 61.5 20.1 5 22 0.5 50 15 5 1.0 2.1 > ex3.bmp
       % atlc ex3.bmp

       In the  fourth  example,  materials  with  permittivites  2.78  and  7.89  are  used.  While  there  is	no  change  in	how  to  use  cre-
       ate_bmp_for_rect_in_rect, since these permittivities are not known, we must tell atlc what they are.  % create_bmp_for_rect_in_rect 61 20 1
       4 22 0.5 50 15 5 2.78 7.89 > ex5.bmp % atlc -d CAFF00=2.78 -d AC82AC=7.89 ex5.bmp In the sixth and final example, the -v option is used	to
       print some extra data to stderr from create_bmp_for_rect_in_rect.

SEE ALSO

       atlc(1)	      create_bmp_for_circ_in_circ(1)	    create_bmp_for_circ_in_rect(1)	  create_bmp_for_microstrip_coupler(1)	      cre-
       ate_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_stripline_cou-
       pler(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					     atlc-4.5.0 28th Sept 2003				    create_bmp_for_rect_in_rect(1)