NAME

       yagi - Yagi-Uda project antenna current calculator

SYNOPSIS

       yagi [ - dhps ] filename

DESCRIPTION

       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.

AVAILABILITY

OPTIONS

       -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.

Limitations

       I'm  not  aware  of  any  limitations,  apart  from  that filenames, including full path, can't exceed 90
       characters.

FILES

       filename.out       Binary data file

SEE ALSO

       first(1), input(1), output(1), optimise(1), first(5), input(5), output(5) and optimise(5).

PLATFORMS

       Both DOS and Unix versions have been built. The DOS version as distributed requires a 386 PC with  a  387
       maths coprocessor.

BUGS

       Bugs  should  be  reported  to  david.kirkby@onetel.net.   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.

AUTHORS

       Dr. David Kirkby G8WRB (david.kirkby@onetel.net), with help with converting to DOS from Dr. Joe Mack NA3T
       (mack@fcrfv2.ncifcrf.gov).

Version 1.16                                   24th October 2000                                         YAGI(1)