yagi - Yagi-Uda project antenna current calculator
yagi [ - dhps ] filename
The program yagi is one of a number of executable programs
that forms part of a set of programs, collectively known as
the Yagi-Uda project , which were designed for analysis and
optimisation of Yagi-Uda antennas. yagi calculates the
currents at the centre of each element at one or more fre-
quencies, as specified in the input file.
-d 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.
-h Print a help message.
-p 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.
-s Suppress all diagnostic output. By default, the program
print the percentage of the job completed.
is the name of the file containing the antenna descrip-
tion. It is expected to be in a format created by
either input or first - two other programs in the
Yagi-Uda project. This is an ASCII text file. The
antenna currents are written to a file filename.out
which is a binary file. It is not intended to be read
I'm not aware of any limitations, apart from that filenames,
including full path, can't exceed 90 characters.
filename.out Binary data file
first(1), input(1), output(1), optimise(1), first(5),
input(5), output(5) and optimise(5).
Both DOS and Unix versions have been built. The DOS version
as distributed requires a 386 PC with a 387 maths coproces-
Bugs should be reported to firstname.lastname@example.org. 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.
Dr. David Kirkby G8WRB (email@example.com), with help
with converting to DOS from Dr. Joe Mack NA3T
Man(1) output converted with