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holl_ands | Home > Multi-Bay Bowtie Antennas > UHF 2-Bay Bowties with Reflector > Browse:UHF H2 2-Bay Bowties + Various Refl RodsUHF H2 2-Bay Bowties + Screen ReflectorM2 (9.5"x9.0") 2-Bay w Var. ReflectorsA-D DB-2 with Reflector
UHF H2 2-Bay Bowties + Various Refl Rods UHF H2 (10.5"x12.25") 2-Bay Bowtie with 11 Reflector Rods analyzed using 4nec2 after determining dimensions using nikiml's Python Optimization Scripts. UHF Raw Gain = 11.7 to 13.8 dBi, F/B & F/R Ratio Min. = 18.8 dB and SWR (300-ohms) Under 2.6. Hi-VHF Raw Gain = 7.9 to 7.8 to 7.9 dBi, F/B & F/R Ratio = 9.8 to 15.6 dB and SWR (300-ohms) = 75 to 24. OPTIMIZED DIMENSIONS: BowLength = 10.5-in = Whisker Length, BowSpacing = 12.25-in = Separation between Bowties, TineSep = 6.0-in = Tine Separation Tip-to-Tip, FeedSep = 2.5-in = Feedline Separation, Element & Feedline Wire Size = AWG10, Reflector Rod Wire Size = QICT (Quarter-Inch Copper Tubing) [Could be thinner], RS = 5.0-in = Reflector Rod Separation behind Hourglass, RR = 2.25-in = Reflector Rod-to-Rod Separation, YRod = 17.0-in = Reflector Rod Half-Lengths. Date(s): 4 Mar 2015. Album by holl_ands. 1 - 21 of 21 Total. 9044 Visits.
enlarge 130KB, 841x1024 1 UHF H2 2-Bay Bowties - 11RR 3D View enlarge 276KB, 1024x772 2 UHF H2 2-Bay Bowties - 11RR Front View [1 large square = 2.5 inches] enlarge 118KB, 384x1024 3 UHF H2 2-Bay Bowties - 11RR Top View [1 large square = 2.5 inches] enlarge 177KB, 1024x741 4 UHF H2 2-Bay Bowties - 11RR UHF Raw Gain = 11.7 to 13.8 dBi UHF F/B & F/R Ratio Minimum = 18.8 dB enlarge 187KB, 1024x741 5 UHF H2 2-Bay Bowties - 11RR UHF SWR (300-ohms) Under 2.6 enlarge 230KB, 1024x741 6 UHF H2 2-Bay Bowties - 11RR UHF Impedance enlarge 301KB, 1024x1024 7 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 470 MHz enlarge 301KB, 1024x1024 8 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 530 MHz enlarge 299KB, 1024x1024 9 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 590 MHz enlarge 301KB, 1024x1024 10 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 650 MHz enlarge 301KB, 1024x1024 11 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 698 MHz enlarge 303KB, 1024x1024 12 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 758 MHz enlarge 304KB, 1024x1024 13 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 806 MHz enlarge 33KB, 791x1024 14 UHF H2 2-Bay Bowties - 11RR 4nec2 File contains Dimension Summary enlarge 139KB, 516x1024 15 UHF H2 2-Bay Bowties - 11RR Side View [1 large square = 2.5 inches] enlarge 163KB, 1024x741 16 UHF H2 2-Bay Bowties - 11RR Hi-VHF Raw Gain = 7.9 to 7.8 to 7.9 dBi Hi-VHF F/B & F/R Ratio = 9.8 to 15.6 dB enlarge 198KB, 1024x741 17 UHF H2 2-Bay Bowties - 11RR Hi-VHF SWR (300-ohms) = 75 to 24 is Excessive enlarge 220KB, 1024x741 18 UHF H2 2-Bay Bowties - 11RR Hi-VHF Impedance enlarge 307KB, 1024x1024 19 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 174 MHz enlarge 303KB, 1024x1024 20 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 198 MHz enlarge 307KB, 1024x1024 21 UHF H2 2-Bay Bowties - 11RR Azimuthal Pattern at 216 MHz
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