sym_strip ‐ bitmap generator for thin conductor betwen two
infinite groundplanes (part of atlc)

sym_strip  W H w bitmapfile

This man page is not a complete set of documentation. See
the html files for more complete information. So far, I’ve
not managed to install the html files into /usr/local, so
you will have to look into the atlc‐X.Y.Z/docs/html‐docs
directory for them.

sym_strip is a pre‐processor for atlc, the finite difference
programme that is used to calculate the properties of a two‐
conductor electrical transmission line of arbitrary cross
section. The programme sym_strip is used as a fast way of
generating bitmaps (there is no need to use a graphics
programme), for a 1 pixel thick conductor of width w,
centrally located inside a pair of groundplanes of width W
and separation H. This has an exact analytical answer, when
the inner is infinitely thin and the width W is infinitely
wide. This theoretical impedance is also calculated by the
sym_strip. It is therefore used as a test of atlc.
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐  ^
|                                                   |  |
|                                                   |  |
|              <‐‐‐‐‐‐‐‐‐‐w‐‐‐‐‐‐‐‐‐‐‐>             |  |
|                                                   |  H
|                                                   |  |
|                                                   |  |
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐  v

The parameters ’W’ and ’H’ and the inner dimensions of the
outer conductor.  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
surrounded by a dielectric of relative permittivity ’Er1’.
The dielectrics ’Er1’ and then ’Er1’ and ’Er2’ will both be

     The bitmaps produced by sym_strip are 24‐bit bit colour
bitmaps, as are required by atlc. Currenly sym_strip only
produces bitmaps with white (vacuum) dielectrics.

There are no options for sym_strip.

atlc(1), rect_cen_in_rect(1), circ_in_circ(1).
rect_in_rect(1), circ_in_rect(1).  rect_in_circ(1),
readbin(1) and sym_strip(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
http://www.david‐              ‐ my home page
http://www.david‐          ‐ ham radio pages