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holl_ands | Home > Stacked Antennas > Vertically Stacked UHF Antennas > Browse:UHF Stacked Antennas Comparison ChartsVert-Stack FF6 + DoubleAngleRefl.Vert-Stack FF4 + DoubleAngleRefl.Vert-Stack FF4 SingleAngleRefl SidelobesVert-Stack M4 (9.5x9) + DoubleAngleRefl.Vert-Stack M4 (9.5x9) + NO Refl. + HHHUHF Vert-Stack CM4221 4-Bays - OPTUHF Vertical Stacked A-D 91XGUHF V-Stack 8-El FD-Yagi w. 2RR Ea - OPTVert-Stack UHF Hourglass-Loop - NO ReflV-Stack UHF Hourglass-Loop + 15RRV-Stack UHF Quad-Trap-Loop - 15RR
V-Stack UHF Hourglass-Loop + 15RR V-Stack UHF Hourglass-Loop + 15RR UHF Vertically Stacked Hourglass-Loops with 15 Reflector Rods  analyzed using 4nec2 where nikiml's Python Optimization Scripts were used to Optimize dimensions of the HVH (Hollands Vertical Harness) and  Separation between Hourglass-Loops. UHF Raw Gain = 12.6 to 13.7 dBi, F/B & F/R Ratio Min = 18.3 dB and SWR (300-ohms) under 2.8. Beamwidth = 60-degrees was CONSTANT vs Frequency. Dimensions of HVH wires were determined using nikiml's Python Optimization Scripts: VS = VS=17.5-in = Vertical Stacking Distance (Center-To-Center). VS/2 = 8.75-in, Length of Harness wires from Feedpoint to Center of each Hourglass-Loop. Diagonal = 1.0-in, Length from Harness Wires to each Hourglass-Loop Feedpoint. Hw = 1.125-in (may round to 1.5-in), Xh = -0.5-in = Harness X-Axis Separation from Hourglass-Loops. TOTAL HARNESS WIRE LENGTH (2 required) = 20.5-in = 2x8.75+2x1.0+2x0.5 (for eyelets) Date(s): 11 Jul 2014. Album by holl_ands. 1 - 18 of 18 Total. 5018 Visits.
enlarge 117KB, 606x1024 1 V-Stack UHF Hourglass-Loop + 15RR 3D View enlarge 202KB, 581x1024 2 V-Stack UHF Hourglass-Loop + 15RR Front View Each Reflector is 28"Hx21"W [1 large square = 5 inches] enlarge 118KB, 479x1024 3 V-Stack UHF Hourglass-Loop + 15RR Top View [1 large square = 2.5 inches] enlarge 108KB, 361x1024 4 V-Stack UHF Hourglass-Loop + 15RR Side View [1 large square = 5 inches] enlarge 288KB, 868x1024 5 V-Stack UHF Hourglass-Loop + 15RR Front View DETAIL [1 large square = 2.5 inches] enlarge 160KB, 506x1024 6 V-Stack UHF Hourglass-Loop + 15RR Top View DETAIL [1 large square = 1.25 inches] enlarge 184KB, 1024x675 7 V-Stack UHF Hourglass-Loop + 15RR UHF Raw Gain = 12.6 to 13.7 dBi UHF F/B & F/R Ratio Minimum = 18.3 dB enlarge 187KB, 1024x675 8 V-Stack UHF Hourglass-Loop + 15RR UHF SWR (300-ohms) under 2.8 enlarge 228KB, 1024x675 9 V-Stack UHF Hourglass-Loop + 15RR UHF Impedance enlarge 302KB, 1024x1024 10 V-Stack UHF Hourglass-Loop + 15RR Azimuthal Pattern at 470 MHz enlarge 302KB, 1024x1024 11 V-Stack UHF Hourglass-Loop + 15RR Azimuthal Pattern at 530 MHz enlarge 301KB, 1024x1024 12 V-Stack UHF Hourglass-Loop + 15RR Azimuthal Pattern at 590 MHz enlarge 301KB, 1024x1024 13 V-Stack UHF Hourglass-Loop + 15RR Azimuthal Pattern at 650 MHz enlarge 301KB, 1024x1024 14 V-Stack UHF Hourglass-Loop + 15RR Azimuthal Pattern at 698 MHz enlarge 303KB, 1024x1024 15 V-Stack UHF Hourglass-Loop + 15RR Azimuthal Pattern at 758 MHz enlarge 303KB, 1024x1024 16 V-Stack UHF Hourglass-Loop + 15RR Azimuthal Pattern at 806 MHz enlarge 34KB, 791x1024 17 V-Stack UHF Hourglass-Loop + 15RR 4nec2 File enlarge 316KB, 1024x1015 18 V-Stack UHF Hourglass-Loop + 15RR Side View DETAIL [1 large square = 1.25 inches]
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