Provided by: atlc_4.6.1-5_amd64 bug


       find_optimal_dimensions_for_microstrp_coupler  part of atlc.


       find_optimal_dimensions_for_microstrp_coupler  [options...  ]  h  t  Er1  Er2  Z  Zodd_req
       Zeve_reg 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  this  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


       find_optimal_dimensions_for_microstrp_coupler  is  part  of  the atlc, CAD package for the
       design and analysis of transmission lines and directional couplers. While  the  executable
       program  atlc  (as opposed to the complete package atlc) is able to analyse the properties
       of directional couplers, telling you both the odd and even mode impedances Zodd and Zeven,
       it is not able to design a coupler to have specific odd and even mode impedances. The only
       way to use the program program atlc

       The parameters 'W' and 'H' and the inner dimensions of the  outer  conductor.   The  inner
       conductor has a diameter of 'd' and is offset from the centre of the outer conductor by an
       amount 'x' horizontally and 'y'  vertically.   The  space  between  the  inner  and  outer
       conductors  is  a  dielectric  of  relative  permittivity  'Er'. If there is just a vacuum
       dielectric, then 'Er' should be set to 1.0

       find_optimal_dimensions_for_microstrp_coupler  d W H x y Er > filename.bmp OR
       find_optimal_dimensions_for_microstrp_coupler -f filename.bmp d W H x y Er

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

       The permittivities of the bitmap, set by 'Er', determine the colours in the bitmap. If Er1
       is 1.0, 1.006, 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 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
       atlc, must be told with the -d command line option, 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

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


       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.
       black  = 000,000,000 or 0x000000 is the negative conductor

       All  bitmaps  must have the live (red) and grounded (green) conductor. The black 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)
       white     255,202,202 or 0xFFCACA as Er=1.0006 (air)
       blue      000,000,255 or 0x0000FF 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 213,160,077 or 0xD5A04D as Er=100   (for testing)
       If the permittivity is one not in the above list, then those parts of the image  with  Er1
       will be set to 0xCAFF00, and those parts with Er2 to 0xAC82AC.


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

       % find_optimal_dimensions_for_microstrp_coupler 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
       find_optimal_dimensions_for_microstrp_coupler  is  sent  to  a file ex1.bmp, which is then
       processed by atlc

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

       In  example  3,  the  bitmap  is  made larger, to increase accuracy, but otherwise this is
       identical to the second example.  % find_optimal_dimensions_for_microstrp_coupler -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,        instead        of        re-directing
       find_optimal_dimensions_for_microstrp_coupler's output to a file with the >  sign,  it  is
       done using the -f option.
       %  find_optimal_dimensions_for_microstrp_coupler -f ex4.bmp 61.5 20.1 5 22 0.5 50 15 5 1.0
       % atlc ex4.bmp

       In the fifth example, materials with permittivites 2.78 and 7.89 are used. While there  is
       no  change  in  how  to  use  find_optimal_dimensions_for_microstrp_coupler,  since  these
       permittivities   are   not   known,   we   must   tell   atlc   what    they    are.     %
       find_optimal_dimensions_for_microstrp_coupler 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_rect_in_rect(1)                         create_bmp_for_stripline_coupler(1)
       create_bmp_for_symmetrical_stripline(1) design_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

Dr. David Kirkby                    atlc-4.5.0 28findeoptimal_dimensions_for_microstrp_coupler(1)