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<HTML>
<BODY>
<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
</PRE>
<H2>NAME</H2><PRE>
<B>create_bmp_for_rect_in_rect</B> - bitmap generator for rectangu-
lar conductor inside rectangular conductor (part of <B>atlc</B>)
</PRE>
<H2>SYNOPSIS</H2><PRE>
<B>create_bmp_for_rect_in_rect</B> <B>[options...</B> <B>]</B> <B>W</B> <B>H</B> <B>a</B> <B>b</B> <B>c</B> <B>d</B> <B>w</B> <B>h</B>
<B>Er1</B> <B>Er2</B> <B>filename.bmp</B>
</PRE>
<H2>WARNING</H2><PRE>
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 documen-
tation - even spelling errors and typos, please let me know.
</PRE>
<H2>DESCRIPTION</H2><PRE>
<B>create_bmp_for_rect_in_rect</B> is a pre-processor for <B>atlc</B>, the
finite difference program that is used to calculate the pro-
perties of a two and three conductor electrical transmission
line of arbitrary cross section. The program
<B>create_bmp_for_rect_in_rect</B> is used as a fast way of gen-
erating bitmaps (there is no need to use a graphics pro-
gram), for a rectangular conductor inside a rectangular con-
ductor, 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 conduc-
tor 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 sur-
rounded 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
<B>create_bmp_for_rect_in_rect</B> <B>-f</B> <B>filename.bmp</B> <B>W</B> <B>H</B> <B>a</B> <B>b</B> <B>c</B> <B>d</B> <B>w</B> <B>h</B>
<B>Er1</B> <B>Er2</B>
The bitmaps produced by <B>create_bmp_for_rect_in_rect</B> are 24-
bit bit colour bitmaps, as are required by <B>atlc</B>.
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 per-
mittivity 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 <B>atlc</B> does not
know what these permittivites are, so they <B>atlc</B>, must be
told with the comand line option -d, as in example 4 below.
</PRE>
<H2>OPTIONS</H2><PRE>
<B>-b</B> <B>bitmapsize</B>
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.
<B>-f</B> <B>outfile</B>
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.
<B>-v</B>
Causes <B>create_bmp_for_rect_in_rect</B> to print some data to
stderr. Note, nothing extra goes to standard output, as that
is expected to be redirected to a bitmap file.
</PRE>
<H2>COLOURS</H2><PRE>
The 24-bit bitmaps that <B>atlc</B> 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 pos-
sible 16777216 colours can be defined precisely by the stat-
ing 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 <B>atlc</B>, 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, <B>or</B> 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 <B>must</B> 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 <B>and</B> <B>so</B> <B>are</B>
<B>produced</B> <B>by</B> create_bmp_for_rect_cen_in_rect<B>.</B>
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)
</PRE>
<H2>EXAMPLES</H2><PRE>
Here are a few examples of the use of
<B>create_bmp_for_rect_in_rect</B>. Again, see the html documenta-
tion in atlc-X.Y.Z/docs/html-docs/index.html for more exam-
ples.
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.
<B>%</B> <B>create_bmp_for_rect_in_rect</B> <B>3</B> <B>3</B> <B>1</B> <B>1</B> <B>1</B> <B>1</B> <B>1</B> <B>1</B> <B>></B> <B>ex1.bmp</B>
<B>%</B> <B>atlc</B> <B>ex1.bmp</B>
In this second example, an inner of 15.0 mm x 0.5 mm is sur-
rounded 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
<B>create_bmp_for_rect_in_rect</B> is sent to a file ex1.bmp, which
is then processed by <B>atlc</B>
<B>%</B> <B>create_bmp_for_rect_in_rect</B> <B>61.5</B> <B>20.1</B> <B>5</B> <B>22</B> <B>0.5</B> <B>50</B> <B>15</B> <B>5</B> <B>1.0</B>
<B>2.1</B> <B>></B> <B>ex2.bmp</B>
<B>%</B> <B>atlc</B> <B>ex2.bmp</B>
In example 3, the bitmap is made larger, to increase accu-
racy, but otherwise this is identical to the second example.
<B>%</B> <B>create_bmp_for_rect_in_rect</B> <B>-b7</B> <B>61.5</B> <B>20.1</B> <B>5</B> <B>22</B> <B>0.5</B> <B>50</B> <B>15</B> <B>5</B>
<B>1.0</B> <B>2.1</B> <B>></B> <B>ex3.bmp</B>
<B>%</B> <B>atlc</B> <B>ex3.bmp</B>
In the fourth example, materials with permittivites 2.78 and
7.89 are used. While there is no change in how to use
<B>create_bmp_for_rect_in_rect</B>, since these permittivities are
not known, we must tell <B>atlc</B> what they are.
<B>%</B> <B>create_bmp_for_rect_in_rect</B> <B>61</B> <B>20</B> <B>1</B> <B>4</B> <B>22</B> <B>0.5</B> <B>50</B> <B>15</B> <B>5</B> <B>2.78</B>
<B>7.89</B> <B>></B> <B>ex5.bmp</B> <B>%</B> <B>atlc</B> <B>-d</B> <B>CAFF00=2.78</B> <B>-d</B> <B>AC82AC=7.89</B> <B>ex5.bmp</B>
In the sixth and final example, the -v option is used to
print some extra data to stderr from
<B>create_bmp_for_rect_in_rect</B>.
</PRE>
<H2>SEE ALSO</H2><PRE>
<B>atlc(1)</B> <B>create_bmp_for_circ_in_circ(1)</B>
<B>create_bmp_for_circ_in_rect(1)</B>
<B>create_bmp_for_microstrip_coupler(1)</B>
<B>create_bmp_for_rect_cen_in_rect(1)</B>
<B>create_bmp_for_rect_cen_in_rect_coupler(1)</B>
<B>create_bmp_for_rect_in_circ(1)</B>
<B>create_bmp_for_stripline_coupler(1)</B>
<B>create_bmp_for_symmetrical_stripline(1)</B> <B>design_coupler(1)</B>
<B>find_optimal_dimensions_for_microstrip_coupler(1)</B> <B>readbin(1)</B>
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
</PRE>
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