UHF Bi-Quad with 9 Reflector Rods (per khaye post) analyzed using 4nec2.
Element Diameter = 1/8-inch (AWG8), All Diamond Sides = 17 cm (6.7-in), Feedpoint Gap Size = 2 cm (0.78-in) [4nec2 model used 0.75-in] Outer Angles = 45.0-deg, Inner Angles = 54.5-deg (would be 45-deg for zero Gap Size). [AWG10 would slightly degrade SWR.]
9 Reflector Rods, 3/8-in Diameter, 40-cm (15.75-in) Long with 6-cm (2.36-in) Spacing, 14-cm (5.5-in) behind Bi-Quad.
Optimized for New UHF Band (Ch14-51), with Raw Gain & SWR degradation on highest channels. Optimum size for Old UHF Band (Ch14-69) would be 16.3-cm (6.4-in) per side, shifting indicated performance at 770 up to 806 MHz.
Date(s): 13 Mar 2011. Album by holl_ands. 1 - 12 of 12 Total. 4106 Visits.