7 elements Yagi-Uda antenna

Antenna description:
7 elements Yagi-Uda design for VHF spectrum;
Boom length 1.5873 Wavelength; i.e. 3.30m@144.2MHz;
Front/Rear ratio >= 23dB both E/H plane;
Gain >= 12.8 dBi; i.e. >= 10.7 dBd;
Impedance = 50.0 Ohm +/- j0.0 Ohm;
(need 1:1 balun with 180° phase shifter);
Bandwidth >= 0.3% (i.e. 400KHz@144.2MHz)
SWR <= 1.13 : 1
elements by aluminum tube T6060
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° 231FR128G500Z

dimension in wavelength:

half elements, in wavelengths:
   pos./diam.  0.0075    0.0055 

Ref  0.0000    0.2415    0.0000 
DE   0.1395    0.2309    0.0092 
D1   0.2273    0.2268    0.0000 
D2   0.4377    0.2203    0.0000 
D3   0.7936    0.2116    0.0000 
D4   1.1832    0.2015    0.0000 
D5   1.5873    0.1953    0.0000

dimension in mks (example @ 144.2 MHz):

half elements, in centimeters:
   pos./diam.   1.550    1.1500
   
Ref   0.0000   50.2000   0.0000  
DE   29.0000   48.0000   1.9050  
D1   47.2500   47.1500   0.0000  
D2   91.0000   45.8000   0.0000  
D3  165.0000   44.0000   0.0000  
D4  246.0000   41.9000   0.0000 
D5  330.0000   40.6000   0.0000

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