YAGI(1) 						      General Commands Manual							   YAGI(1)

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)