yagi - Yagi-Uda project antenna current calculator
[ - dhps
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.
calculates the currents at the centre of each element at one or
more frequencies, as specified in the input file.
- 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.
- Print a help message.
- 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
- Suppress all diagnostic output. By default, the program print the
percentage of the job completed.
- 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
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 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 (firstname.lastname@example.org).