Provided by: atlc_4.6.1-5_amd64 bug


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


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


       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 documentation - even spelling errors and typos,  please  let  me


       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        |  |
       |     |..................................| |        |  |
       |     |..................................| |        |  |
       -----------------------------------------------------  |

       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.


       -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.

       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.


       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
       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

       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)


       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 material 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.  % create_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 create_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


       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_stripline_coupler(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