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create_bmp_for_rect_in_rect(General Commands Mancreate_bmp_for_rect_in_rect(1)

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

       create_bmp_for_rect_in_rect [options... ] W H a b c d w h Er1 Er2 file-

       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 docu-
       mentation 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 know.

       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 con-
       ductor.	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 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

       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	 exam-
       ple 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  de-
       fault  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 redi-
       rected 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 lev-
       els 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

       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 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  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 pur-

       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/in-
       dex.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	 mate-
       rial  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 >
       % atlc ex2.bmp

       In example 3, the bitmap	is made	larger,	to increase accuracy, but oth-
       erwise	this   is   identical	to   the   second   example.   %  cre-
       ate_bmp_for_rect_in_rect	-b7 61.5 20.1 5	22 0.5	50  15	5  1.0	2.1  >
       % 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	  cre-
       ate_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 create_bmp_for_rect_in_rect.

       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)			  cre-
       ate_bmp_for_rect_in_circ(1)  create_bmp_for_stripline_coupler(1)	  cre-
       ate_bmp_for_symmetrical_stripline(1) design_coupler(1) find_optimal_di-
       mensions_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

Dr. David Kirkby	   atlc-4.5.0 28th Sept	create_bmp_for_rect_in_rect(1)


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