is there any specific formula to calculate yagi-uda antenna Gain? i know that The Gain of Yagi Antenna depends on length of antenna array and do not depend on number of directors used in the design , but how can i calculate it?

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    \$\begingroup\$ There's no formula - each design has to be optimised. But SM5BSZ has done a fantastic job in this paper. Perhaps fit a line in the form of G=x+y.log(length/wavelength) from the final graph. sm5bsz.com/antennas/cpudes01.htm \$\endgroup\$ – tomnexus Oct 19 '18 at 11:21
  • \$\begingroup\$ Directional gain is certainly related to the number of directors - they determine the lobe pattern. Remember the absolute radiated power is constant; a directional antenna affects how that power is distributed around the polar plot. \$\endgroup\$ – Chu Oct 19 '18 at 16:54

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