4 elements Yagi-Uda antenna

Antenna description:
4 elements Yagi-Uda design for HF/VHF spectrum;
Boom length 0.3857 Wavelength; i.e. 2.3m@50.2MHz;
Front/Rear ratio >= 24dB;
Gain >=  8.3 dBi; i.e. >=  6.2 dBd;
Impedance = 28.1 Ohm +/- j0.0 Ohm Flat;
(needs 1.77:1 balun with 180° phase shifter);
Bandwidth >= 2% (i.e. 1MHz@50.15MHz)
1.00:1 <= SWR <= 1.31 : 1
aluminum tube T6060 of stepped diameter sizes
Warning: this is not a tested antenna, for
home brewing select your own design then cut-try and measure.

Radiation pattern Yagi-Uda antenna model n° 247FR83G281ZBW5F

dimension in wavelength:

half elements, in wavelengths:  
   pos./diam.    0.0026    0.0019

Ref    0.0000    0.0836    0.1661
DE     0.1621    0.0836    0.1599
D1     0.2439    0.0836    0.1459
D2     0.3857    0.0836    0.1347

dimension in mks (example @ 50.15 MHz):

half elements, in centimeters (@50.150 MHz):
   pos./diam.    1.5500     1.1500

Ref    0.0000   50.0000    99.3000
DE    96.9000   50.0000    95.6000
D1   145.8000   50.0000    87.2000
D2   230.6000   50.0000    80.5000

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