Provided by: atlc_4.6.1-5_amd64 bug


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


       create_bmp_for_rect_cen_in_rect [options... ] W H w h Er outfile.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_cen_in_rect is a pre-processor for atlc, the finite difference program
       that is used to calculate the properties of a two-conductor electrical  transmission  line
       of  arbitrary cross section. The program create_bmp_for_rect_cen_in_rect is used as a fast
       way of generating bitmaps (there is no need to use a graphics program), for a  rectangular
       conductor placed centrally inside another rectangular conductor, like this:

       -----------------------------------------------------  ^
       |                                                   |  |
       |            Dielectric, permittivity=Er            |  |
       |                                                   |  |
       |                                                   |  |
       |                                                   |  |
       |             <----------w----------->              |  |
       |             ------------------------   ^          |  |
       |             |                      |   |          |  |
       |             |  Metallic conductor  |   |          |  H
       |             |  conductor (must be  |   h          |  |
       |             |  in  the centre)     |   |          |  |
       |             |                      |   |          |  |
       |             ------------------------   ^          |  |
       |                                                   |  |
       |                                                   |  |
       |                                                   |  |
       |                                                   |  |
       |                                                   |  |
       |                                                   |  |
       -----------------------------------------------------  |

       The  parameters  'W'  and  'H' and the inner dimensions of the outer conductor.  The outer
       dimensions of the inner conductor are 'w' and 'h'. The inner conductor is  assumed  be  be
       placed  centrally  inside  the  outer  conductor. The spaced between the two conductors is
       filled with a dielectric of relative permittivity Er

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

       The permittivity of the bitmap, set by 'Er', determine the colours in the bitmap. If Er is
       1.0, 2.1, 2.2, 2.33, 2.5, 3.3, 3.335, 4.8 or 10.2, then the colour corresponding  to  that
       permittivity  will  be set according to the colours defined in COLOURS below. If Er is not
       one of those permittivities, the region of permittivity Er  will  be  set  to  the  colour
       0xCAFF00.  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_cen_in_rect to print some data to stdout.


       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
       The following conductors are recognised by atlc:
       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 0x000000 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)
       light 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 ox696969 as Er=6.15  (duroid 6006)
       L. gray    240,240,240 or 0xDCDCDC as Er=10.2  (duroid 6010)
       D. orange  213,130,067 or 0xD5A04D as Er=100.0 (mainly for test purposes)
       If the permittivity is one not in the above list, then those parts of the  image  with  Er
       will be set to 0xCAFF00.


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

       1) In the first example, there is just a vacuum dielectric, so Er=1.0.  The inner  of  1x1
       inches  (or  mm,  miles  etc)  is  placed  centrally in an outer with dimensions 3.3 x 3.9

       % create_bmp_for_rect_cen_in_rect 3.3 3.9 1 1 1 > 1.bmp
       % atlc 1.bmp

       2) In this second example, an inner of 15.0 mm x 5.0 mm is surrounded  by  an  outer  with
       internal  dimensions  of  71.5 x 60.0 mm. There is a material with permittivity 2.1 (Er of
       PTFE) around the inner conductor. The output from create_bmp_for_rect_cen_in_rect is  sent
       to a file 2.bmp, which is then processed by atlc

       % create_bmp_for_rect_cen_in_rect 71.5 60.0 15.0 5.0 2.1 > 2.bmp
       % atlc 2.bmp

       3)  In  example  3, the bitmap is made larger, to increase accuracy, but otherwise this is
       identical to the second example.  % create_bmp_for_rect_cen_in_rect -b7 71.5 60 15 5 2.1 >
       % atlc 3.bmp

       In the fourth example, instead of re-directing create_bmp_for_rect_cen_in_rect's output to
       a file with the > sign, it is done using the -f option.
       % create_bmp_for_rect_cen_in_rect -f 4.bmp 61.5 28.1 5 22 2.1
       % atlc 4.bmp


       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_coupler(1)
       create_bmp_for_rect_in_circ(1)                              create_bmp_for_rect_in_rect(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