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<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
</PRE>
<H2>NAME</H2><PRE>
yagi - Yagi-Uda project antenna current calculator
</PRE>
<H2>SYNOPSIS</H2><PRE>
<B>yagi</B> [ <B>-</B> <B>dhps</B> ] filename
</PRE>
<H2>DESCRIPTION</H2><PRE>
The program <I>yagi</I> is one of a number of executable programs
that forms part of a set of programs, collectively known as
the <I>Yagi</I>-<I>Uda</I> <I>project</I> , which were designed for analysis and
optimisation of Yagi-Uda antennas. <I>yagi</I> calculates the
currents at the centre of each element at one or more fre-
quencies, as specified in the input file.
</PRE>
<H2>AVAILABILITY</H2><PRE>
</PRE>
<H2>OPTIONS</H2><PRE>
-<B>d</B> Display element currents. When this option is used, a
bar graph with up to 70 stars (*) is used to display
the absolute magnitude of the element currents. The
element with the greatest element current has 70 *'s,
all others have a corresponding smaller number, depend-
ing on the their relative current. The element current,
normallised to the maximum, is also shown as a 4 digit
floating point number.
-<B>h</B> Print a help message.
-<B>p</B> Print the Z matrix. The Z matrix is the impedance
matrix, showing the self impedance of the elements on
the diagonal and the mutual impedance off the diagonal.
-<B>s</B> Suppress all diagnostic output. By default, the program
print the percentage of the job completed.
<I>filename</I>
is the name of the file containing the antenna descrip-
tion. It is expected to be in a format created by
either <I>input</I> or <I>first</I> - two other programs in the
<I>Yagi</I>-<I>Uda</I> <I>project</I>. This is an ASCII text file. The
antenna currents are written to a file <I>filename</I>.<I>out</I>
which is a binary file. It is not intended to be read
by humans.
</PRE>
<H2>Limitations</H2><PRE>
I'm not aware of any limitations, apart from that filenames,
including full path, can't exceed 90 characters.
</PRE>
<H2>FILES</H2><PRE>
filename.out Binary data file
</PRE>
<H2>SEE ALSO</H2><PRE>
<B>first(1)</B>, <B>input(1)</B>, <B>output(1)</B>, <B>optimise(1)</B>, <B>first(5)</B>,
<B>input(5)</B>, <B>output(5)</B> and <B>optimise(5)</B>.
</PRE>
<H2>PLATFORMS</H2><PRE>
Both DOS and Unix versions have been built. The DOS version
as distributed requires a 386 PC with a 387 maths coproces-
sor.
</PRE>
<H2>BUGS</H2><PRE>
Bugs should be reported to <B>david.kirkby@onetel.net</B>. Bugs
tend actually to be fixed if they can be isolated, so it is
in your interest to report them in such a way that they can
be easily reproduced. If the input file is edited manually
and done incorrectly, there can be unpredictable results.
</PRE>
<H2>AUTHORS</H2><PRE>
Dr. David Kirkby G8WRB (david.kirkby@onetel.net), with help
with converting to DOS from Dr. Joe Mack NA3T
(mack@fcrfv2.ncifcrf.gov).
</PRE>
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