1000    Mininec numerical modeling in electromagnetics.

1001    YAGIMAX 2.21    By Lew Gordon, K4VX


        The YAGIMAX program represents my latest attempt at antenna modeling 
        software. It is based upon the assumption that the antenna is 
        monotapered. The algorithm used for YAGIMAX is not derived from 
        MININEC as was the case with all versions of YAGINEC, but is based 
        upon the asumption that correctly designed Yagi antennas have a 
        sinusodial current distribution which is well behaved. For correct 
        results this requires that the user input realistic dimensions when 
        using YAGIMAX.

        In order to expand beyond the 10 element limit of YAGINEC for VHF 
        and UHF antennas, YAGIMAX has been written without help screens. 
        Most of the information contained in the YAGINEC help screens is 
        applicable to YAGIMAX. All files are transportable between YAGINEC, 
        YAGIMAX, and TAPER.

1002    ACCUPLOT.EXE, SCALE.EXE, OPTYAGI.EXE
        Yagi Antenna Evaluation Programs for the IBM PC
        by N6BV, with appreciation to WB3BGU, N2FB, K1GQ and W2PV
                          
        ACCUPLOT can evaluate designs where elements of different frequencies 
        are interlaced on the same boom.
        
        ACCUPLOT allows the operator to evaluate the gain and the 360 
        degree azimuthal and 180 degree elevation response patterns of a 
        Yagi antenna over a frequency band, allowing one to graph at each 
        frequency the polar or rectangular response directly on-screen.  
        In addition, detailed data may be saved to a disk file for 
        importation into other graphing programs if desired.

        The SCALE program takes data from a disk file created by ACCU-
        PLOT,  scales the design to a new frequency or a new tapering 
        schedule, and then saves the scaled parameters to a new disk 
        file.  The operator may then run this newly created disk file 
        through ACCUPLOT to verify the pattern and the scaling.

        OPTYAGI takes a ACCUPLOT disk file and allows the operator to 
        manipulate element lengths or element spacings interactively to 
        optimize either gain, front-to-back ratio, or a combination of 
        gain and F/B.  The computations are shown on screen at three 
        frequencies: low-end, geometric mean, and high end of a band.  
        Any modifications done to the Yagi parameters may be saved to 
        disk for detailed use by the ACCUPLOT program.

1003    Y A G I - U D A   D E S I G N   P R O G R A M S 

         YAGI_UDA  computes  the  radiation pattern (elevation or 
         azimuth)  for  the  Yagi  array  defined  in a user-specified 
         input  data file.
    
1004