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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).



	    

	    

	
	    
	    

	      
	      

	      
	    

	    

	
	    
      
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