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<H2>WARNING</H2><PRE>
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This man page is not a complete set of documentation. See
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the html files for more complete information. So far, I've
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not managed to install the html files into /usr/local, so
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you will have to look into the atlc-2.X.Y.Z/docs/html-docs
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This man page is not a complete set of documentation - the
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complexity of the atlc project makes man pages not an ideal
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way to document it, although out of completeness, man pages
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are produced. The best documentation that was current at the
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time the version was produced should be found on your hard
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/usr/local/share/atlc/docs/html-docs/index.html
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although it might be elsewhere if your system administrator
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chose to install the package elsewhere. Sometimes, errors
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are corrected in the documentation and placed at
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http://atlc.sourceforge.net/ before a new release of atlc is
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released. Please, if you notice a problem with the documen-
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tation - even spelling errors and typos, please let me know.
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<H2>DESCRIPTION</H2><PRE>
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<B>create_bmp_for_rect_cen_in_rect</B> is a pre-processor for <B>atlc</B>,
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the finite difference programme that is used to calculate
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the properties of a two-conductor electrical transmission
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line of arbitrary cross section. The programme
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the finite difference program that is used to calculate the
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properties of a two-conductor electrical transmission line
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of arbitrary cross section. The program
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<B>create_bmp_for_rect_cen_in_rect</B> is used as a fast way of
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generating bitmaps (there is no need to use a graphics pro-
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gramme), for a rectangular conductor placed centrally inside
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gram), for a rectangular conductor placed centrally inside
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another rectangular conductor, like this:
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----------------------------------------------------- ^
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that permittivity will be set according to the colours
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defined in COLOURS below. If Er is not one of those permit-
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tivities, the region of permittivity Er will be set to the
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colour 0xCAFF00. The programme <B>atlc</B> does not know what these
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colour 0xCAFF00. The program <B>atlc</B> does not know what these
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permittivites are, so they <B>atlc</B>, must be told with the
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comand line option -d, as in example 4 below.
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total of 256*256*256=16777216 colours. Every one of the pos-
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sible 16777216 colours can be defined precisely by the stat-
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ing the exact amount of red, green and blue, as in:
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red = 255,000,000 or 0xff0000
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green = 000,255,000 or 0x00ff00
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blue = 000,000,255 or 0x0000ff
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Brown = 255,000,255 or 0xff00ff
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gray = 142,142,142 or 0x8e8e8e
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Some colours, such as pink, turquiose, sandy, brown, gray
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Some colours, such as pink, turquoise, sandy, brown, gray
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etc may mean slightly different things to different people.
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This is not so with <B>atlc</B>, as the programme expects the
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colours below to be EXACTLY defined as given. Whether you
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feel the colour is sandy or yellow is up to you, but if you
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use it in your bitmap, then it either needs to be a colour
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recognised by atlc, <B>or</B> you must define it with a command
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line option (see OPTIONS and example 5 below).
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This is not so with <B>atlc</B>, as the program expects the colours
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below to be EXACTLY defined as given. Whether you feel the
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colour is sandy or yellow is up to you, but if you use it in
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your bitmap, then it either needs to be a colour recognised
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by atlc, <B>or</B> you must define it with a command line option
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(see OPTIONS and example 5 below).
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The following conductors are recognised by atlc:
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red = 255,000,000 or 0xff0000 is the live conductor.
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green = 000,255,000 or 0x00ff00 is the grounded conductor.
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All bitmaps <B>must</B> have the live (red) and grounded (green)
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conductor. The blue conductor is not currently supported,
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but it will be used to indicate a negative conductor, which
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will be needed if/when the programme gets extended to
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analyse directional couplers.
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will be needed if/when the program gets extended to analyse
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directional couplers.
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The following dielectrics are recognised by atlc <B>and</B> <B>so</B> <B>are</B>
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<B>produced</B> <B>by</B> create_bmp_for_rect_cen_in_rect<B>.</B>
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sandy 239,203,027 or 0xEFCC1A as Er=3.3 (PVC)
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brown 188,127,096 or 0xBC7F60 as Er=3.335 (epoxy resin)
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Terquoise 026,239,179 or 0x1AEFB3 as Er=4.8 (glass PCB)
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Turquoise 026,239,179 or 0x1AEFB3 as Er=4.8 (glass PCB)
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Dark gray 142,142,142 or ox696969 as Er=6.15 (duroid 6006)
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L. gray 240,240,240 or 0xDCDCDC as Er=10.2 (duroid 6010)
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D. orange 213,130,067 or 0xD5A04D as Er=100.0 (mainly for
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<B>create_bmp_for_rect_cen_in_rect</B>. Again, see the html docu-
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mentation in atlc-X.Y.Z/docs/html-doc/index.html for more
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1) In the first example, there is just a vacuum dielectric,
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so Er=1.0. The inner of 1x1 inches (or mm, miles etc) is
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placed centrally in an outer with dimensions 3.3 x 3.9
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<B>%</B> <B>create_bmp_for_rect_cen_in_rect</B> <B>3.3</B> <B>3.9</B> <B>1</B> <B>1</B> <B>1</B> <B>></B> <B>1.bmp</B>
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<B>%</B> <B>atlc</B> <B>1.bmp</B>
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2) In this second example, an inner of 15.0 mm x 5.0 mm is
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surrounded by an outer with internal dimensions of 71.5 x
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60.0 mm. There is a material with permittivity 2.1 (Er of
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atlc-X.Y.Z/docs/html-docs/index.html - HTML docs
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atlc-X.Y.Z/docs/qex-december-1996/atlc.pdf - theory paper
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atlc-X.Y.Z/examples - examples
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http://www.david-kirkby.co.uk - my home page
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http://www.david-kirkby.co.uk/ham - ham radio pages
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docs/html-docs/create_bmp_for_rect_cen_in_rect.1.html
