1 .TH find_optimal_dimensions_for_microstrp_coupler 1 "atlc-4.5.0 28th Sept 2003" "Dr. David Kirkby"
4 \fBfind_optimal_dimensions_for_microstrp_coupler\fR part of atlc.
6 \fBfind_optimal_dimensions_for_microstrp_coupler [options... ] h t Er1 Er2 Z Zodd_req Zeve_reg outfile.bmp\f1
9 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.
10 The best documentation that was current at the time this version was produced should be found on your
11 hard drive, usually at
13 /usr/local/share/atlc/docs/html\-docs/index.html
15 although it might be elsewhere if
16 your system administrator chose to install the package elsewhere. Sometimes, errors are corrected
17 in the documentation and placed at http://atlc.sourceforge.net/ before a new release of atlc is
18 released. Please, if you notice a problem with the documentation - even spelling errors and typos,
22 \fBfind_optimal_dimensions_for_microstrp_coupler\fR is part of the \fBatlc\fR, CAD package for the design and
23 analysis of transmission lines and directional couplers. While the executable program \fbatlc\fR (as opposed
24 to the complete package \fBatlc\fR) is able to analyse the properties of directional couplers, telling you
25 both the odd and even mode impedances Zodd and Zeven, it is not able to design a coupler to have specific odd
26 and even mode impedances. The only way to use the program program \fBatlc\fR
30 The parameters 'W' and 'H' and the inner dimensions of the outer conductor.
31 The inner conductor has a diameter of 'd' and is offset from the centre
32 of the outer conductor by an amount 'x' horizontally and 'y' vertically.
33 The space between the inner and outer conductors is a
34 dielectric of relative permittivity 'Er'. If there is just a vacuum dielectric,
35 then 'Er' should be set to 1.0
39 \fBfind_optimal_dimensions_for_microstrp_coupler d W H x y Er > filename.bmp\fR OR
41 \fBfind_optimal_dimensions_for_microstrp_coupler -f filename.bmp d W H x y Er\fR
44 The bitmaps produced by \fBfind_optimal_dimensions_for_microstrp_coupler\fR are 24-bit bit colour bitmaps, as are required by \fBatlc\fR.
46 The permittivities of the bitmap, set by 'Er', determine the
47 colours in the bitmap. If Er1 is 1.0, 1.006, 2.1, 2.2, 2.33, 2.5, 3.3,
48 3.335, 3.7, 4.8, 10.2 or 100 then the colour corresponding to that permittivity
49 will be set according to the colours defined in COLOURS below. If Er
50 is not one of those permittivities, the region of permittivity Er
51 will be set to the colour 0xCAFF00. The
52 program \fBatlc\fR does not know what these permittivites are, so
53 \fBatlc\fR, must be told with the -d command line option, as in example 4
59 is used to set the size of the bitmap, and so the accuracy to which atlc
60 is able to calculate the transmission line's properties. The default
61 value for 'bitmapsize' is normally 4, although this is set at compile
62 time. The value can be set anywhere from 1 to 15, but more than 8 is
63 probably not sensible.
70 Causes \fBfind_optimal_dimensions_for_microstrp_coupler\fR to print some data to stderr. Note, nothing
71 extra goes to standard output, as that is expected to be redirected to a
75 The 24-bit bitmaps that \fBatlc\fR expects, have 8 bits assigned
76 to represent the amount of red, 8 for blue and 8 for green. Hence there are
77 256 levels of red, green and blue, making a total of 256*256*256=16777216 colours.
78 Every one of the possible 16777216 colours can be defined precisely by the stating the exact amount
79 of red, green and blue, as in:
82 red = 255,000,000 or 0xff0000
84 green = 000,255,000 or 0x00ff00
86 blue = 000,000,255 or 0x0000ff
88 black = 000,000,000 or 0x000000
90 white = 255,255,255 or 0xffffff
92 Brown = 255,000,255 or 0xff00ff
94 gray = 142,142,142 or 0x8e8e8e
96 Some colours, such as pink, turquoise, sandy, brown, gray etc may mean slightly
97 different things to different people. This is not so with \fBatlc\fR, as the
98 program expects the colours below to be EXACTLY defined as given. Whether
99 you feel the colour is sandy or yellow is up to you, but if you use it in
100 your bitmap, then it either needs to be a colour recognised by atlc, \fBor\fR
101 you must define it with a command line option (see OPTIONS and example 5
104 The following conductors are recognised by atlc:
106 red = 255,000,000 or 0xff0000 is the live conductor.
108 green = 000,255,000 or 0x00ff00 is the grounded conductor.
110 black = 000,000,000 or 0x000000 is the negative conductor
112 All bitmaps \fBmust\fR have the live (red) and grounded (green) conductor. The black
113 conductor is not currently supported, but it will be used to indicate a
114 negative conductor, which will be needed if/when the program gets extended
115 to analyse directional couplers.
117 The following dielectrics are recognised by \fRatlc\fB and so are
118 produced by \fRfind_optimal_dimensions_for_microstrp_coupler\fB.
121 white 255,255,255 or 0xFFFFFF as Er=1.0 (vacuum)
123 white 255,202,202 or 0xFFCACA as Er=1.0006 (air)
125 blue 000,000,255 or 0x0000FF as Er=2.1 (PTFE)
127 Mid gray 142,242,142 or 0x8E8E8E as Er=2.2 (duroid 5880)
129 mauve 255.000,255 or 0xFF00FF as Er=2.33 (polyethylene)
131 yellow 255,255,000 or 0xFFFF00 as Er=2.5 (polystyrene)
133 sandy 239,203,027 or 0xEFCC1A as Er=3.3 (PVC)
135 brown 188,127,096 or 0xBC7F60 as Er=3.335 (epoxy resin)
137 Turquoise 026,239,179 or 0x1AEFB3 as Er=4.8 (glass PCB)
139 Dark gray 142,142,142 or ox696969 as Er=6.15 (duroid 6006)
141 L. gray 240,240,240 or 0xDCDCDC as Er=10.2 (duroid 6010)
143 D. Orange 213,160,077 or 0xD5A04D as Er=100 (for testing)
145 If the permittivity is one not in the above list, then those parts of
146 the image with Er1 will be set to 0xCAFF00, and those parts with Er2 to
149 Here are a few examples of the use of \fBfind_optimal_dimensions_for_microstrp_coupler\fR. Again, see the html documentation in atlc-X.Y.Z/docs/html-docs for more examples.
151 In the first example, there is just an air dielectric, so Er1=Er2=1.0.
152 The inner of 1x1 inches (or mm, miles etc) is placed centrally in an
153 outer with dimensions 3 x 3 inches.
155 The exact place where the dielectric starts (a) and its width (d) are
156 unimportant, but they must still be entered.
158 \fB% find_optimal_dimensions_for_microstrp_coupler 3 3 1 1 1 1 1 1 > ex1.bmp
162 In this second example, an inner of 15.0 mm x 0.5 mm is surrounded by an
163 outer with internal dimensions of 61.5 x 20.1 mm. There is a material
164 with permittivity 2.1 (Er of PTFE) below the inner conductor. The output
165 from \fBfind_optimal_dimensions_for_microstrp_coupler\fR is sent to a file ex1.bmp, which is then processed by
168 \fB% find_optimal_dimensions_for_microstrp_coupler 61.5 20.1 5 22 0.5 50 15 5 1.0 2.1 > ex2.bmp\fR
173 In example 3, the bitmap is made larger, to increase accuracy, but
174 otherwise this is identical to the second example.
175 \fB% find_optimal_dimensions_for_microstrp_coupler -b7 61.5 20.1 5 22 0.5 50 15 5 1.0 2.1 > ex3.bmp\fR
180 In the fourth example, instead of re-directing \fBfind_optimal_dimensions_for_microstrp_coupler's\fR output
181 to a file with the > sign, it is done using the -f option.
183 \fB% find_optimal_dimensions_for_microstrp_coupler -f ex4.bmp 61.5 20.1 5 22 0.5 50 15 5 1.0 2.1\fR
187 In the fifth example, materials with permittivites 2.78 and 7.89 are
188 used. While there is no change in how to use \fBfind_optimal_dimensions_for_microstrp_coupler\fR, since
189 these permittivities are not known, we must tell \fBatlc\fR what they
192 % find_optimal_dimensions_for_microstrp_coupler 61 20 1 4 22 0.5 50 15 5 2.78 7.89 > ex5.bmp
193 % atlc -d CAFF00=2.78 -d AC82AC=7.89 ex5.bmp
195 In the sixth and final example, the -v option is used to print some
196 extra data to stderr from \fBfind_optimal_dimensions_for_microstrp_coupler\fR.
200 create_bmp_for_circ_in_circ(1)
201 create_bmp_for_circ_in_rect(1)
202 create_bmp_for_microstrip_coupler(1)
203 create_bmp_for_rect_cen_in_rect(1)
204 create_bmp_for_rect_cen_in_rect_coupler(1)
205 create_bmp_for_rect_in_circ(1)
206 create_bmp_for_rect_in_rect(1)
207 create_bmp_for_stripline_coupler(1)
208 create_bmp_for_symmetrical_stripline(1)
213 http://atlc.sourceforge.net - Home page
215 http://sourceforge.net/projects/atlc - Download area
217 atlc-X.Y.Z/docs/html-docs/index.html - HTML docs
219 atlc-X.Y.Z/docs/qex-december-1996/atlc.pdf - theory paper
221 atlc-X.Y.Z/examples - examples
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