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 frequencies, 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, depending 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.
- filename
- is the name of the file containing the antenna description.
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
by humans.
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 coprocessor.
Bugs should be reported to
[email protected]. 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 protected]), with help with converting to
DOS from Dr. Joe Mack NA3T (
[email protected]).