Hi-VHF 12-Element Folded Dipole Yagi analyzed using 4nec2 after Dimensions were determined using nikiml's Python Optimization Scripts, with two different assumptions. Optimized Dimensions are found in each 4nec2 File and may be rounded to nearest 1/8 or 1/4-inch. Python Optimization Control Script is appended to the end of each 4nec2 File.
a) Hi-VHF 12-El FD-Yagi with 16-in max spacing between Directors. Target function: (max_ml+8*max_gain_diff+4*max_f2r_diff+max_f2b_diff) Boom Length = 107 inches.
Hi-VHF Raw Gain = 10.0 to 13.1 dBi F/B & F/R Ratio Min = 22 dB (EXCELLENT) SWR (300-ohms) Max = 2.5
FYI: Trying to increase Max Gain at expense of lower F/B & F/R and/or higher SWR, I tried LARGER max_gain multipliers (e.g 16 & 32). However, this resulted in SWR climbing to unacceptable levels.
b) Hi-VHF 12-El FD-Yagi with 25-in max spacing between Directors. Target function: (max_ml+8*max_gain_diff+4*max_f2r_diff+max_f2b_diff) Boom Length = 138 inches.
Hi-VHF Raw Gain Max = 10.0 to 14.0 dBi F/B & F/R Ratio Min = 17 dB (GOOD) SWR (300-ohms) Max = 2.8
Date(s): 15 Mar 2013. Album by holl_ands. 1 - 21 of 21 Total. 7842 Visits.
