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holl_ands | Home > Multi-Bay Bowtie Antennas > Browse:UHF Multi-Bay Comparison ChartsUHF 2-Bay Bowties - NO Reflectors/UHF 2-Bay Bowties with Reflector/UHF 2-Bay SOLID Triangles - Var RR'sUHF 3-Bay Bowties - NO Reflectors/UHF 4-Bay Bowties - NO Reflectors/UHF 4-Bay Bowties with Reflector/UHF H4 2x2-Bay Bowties/HiVHF+UHF HUM4 (9.5x9) + 2Sizes ReflRodsNEW UHF FF6 No Refl - OPTNEW UHF Free-Form 6-Bay (NU-FF6) + VDARUHF FF6 Vertical 6-Bay Bowtie - NO ReflUHF Vertical 6-Bay Bowtie (FF6) + VDARUHF 8-Bay Bowties - If NO Reflectors/UHF 8-Bay Bowtie with Reflector/Hi-VHF 2-Bay Bowtie - NO ReflectorHiVHF 2-Bay - Various Reflector RodsHi-VHF 2-Bay Bowtie - FLAT Grid Refl.Hi-VHF FF4 4-Bay Bowtie - NO ReflectorHi-VHF 4-Bay Bowtie - NO ReflectorHi-VHF 4-Bay Bowtie with Reflector
HiVHF 2-Bay - Various Reflector Rods Hi-VHF 2-Bay Bowtie Antennas with Various Number of Reflector Rods analyzed using 4nec2. a) Hi-VHF 2-Bay Bowtie with 18 Reflector Rods has unusually high F/B Ratio.  Size = 48.75-in H x 59.5-in W. Bowtie dimensions were taken from the Optimized NO Refl. version. ALL Reflector Rod parameters were variables in nikiml's Python Optimization Scripts. Hi-VHF Raw Gain Max = 11 to 13 dBi, Hi-VHF F/B & F/R Ratio Min = 20.2 dB and SWR (300-ohms) under 2.3. BowLength=33-in (AWG10 Elements), BowSpacing=32-in, TineSep=17.0-in, FeedSep=1.5-in (AWG10). Reflector Rod sets are CENTERED behind each Bay, with a Rod directly behind each Bay. Reflector Rod Separation behind Center of Bowties: RS=15.5, Reflector Rod-to-Rod Separation: RR=3.5, Reflector Rod Half-Lengths: YRod=48.75, Reflector Rod Radius (1/4-in Diameter): Rrod=0.125. b) Hi-VHF 2-Bay Bowtie with 10 Reflector Rods has moderate F/B Ratio. Bowtie dimensions were taken from the Optimized NO Refl. version. ALL Reflector Rod parameters were variables in nikiml's Python Optimization Scripts. Size = 42.875-in H x 58.5-in W. Hi-VHF Raw Gain = 10.9 to 13.1 dBi, Hi-VHF F/B & F/R Ratio Min = 15.3 dB and SWR (300-ohms) under 2.4. BowLength=33-in (AWG10 Elements), BowSpacing=32-in, TineSep=17.0-in, FeedSep=1.5-in (AWG10). Reflector Rod sets are CENTERED behind each Bay, with a Rod directly behind each Bay. Reflector Rod Separation behind Center of Bowties: RS=14.25, Reflector Rod-to-Rod Separation: RR=6.5, Reflector Rod Half-Lengths: YRod=42.875, Reflector Rod Radius (1/4-in Diameter): Rrod=0.125. Date(s): 7 Mar 2013. Album by holl_ands. 1 - 24 of 24 Total. 11448 Visits.
enlarge 182KB, 850x1024 1 HiVHF 2-Bay Bowtie - 18 Refl Rods 3D View enlarge 225KB, 1152x635 2 HiVHF 2-Bay Bowtie - 18 Refl Rods Front View -  48.75-in H x 59.5-in W [1 big square = 12.5 inches] enlarge 124KB, 425x1024 3 HiVHF 2-Bay Bowtie - 18 Refl Rods Side View [1 big square = 5 inches] enlarge 177KB, 1024x686 4 HiVHF 2-Bay Bowtie - 18 Refl Rods Hi-VHF Raw Gain Max = 11 to 13 dBi Hi-VHF F/B & F/R Ratio Minimum = 20.2 dB enlarge 194KB, 1024x686 5 HiVHF 2-Bay Bowtie - 18 Refl Rods Hi-VHF SWR (300-ohms) Max = 2.3 enlarge 137KB, 1024x686 6 HiVHF 2-Bay Bowtie - 18 Refl Rods Hi-VHF Impedance enlarge 304KB, 1024x1024 7 HiVHF 2-Bay Bowtie - 18 Refl Rods Azimuthal Pattern at 174 MHz enlarge 305KB, 1024x1024 8 HiVHF 2-Bay Bowtie - 18 Refl Rods Azimuthal Pattern at 198 MHz enlarge 306KB, 1024x1024 9 HiVHF 2-Bay Bowtie - 18 Refl Rods Azimuthal Pattern at 174 MHz enlarge 83KB, 355x1024 10 HiVHF 2-Bay Bowtie - 18 Refl Rods Top View [1 big square = 12.5 inches] enlarge 33KB, 791x1024 11 HiVHF 2-Bay Bowtie - 18 Refl Rods 4nec2 File enlarge 23KB, 791x1024 12 HIVHF 2-Bay Bowtie - 18 Refl Rods Python Control *.bat File enlarge 130KB, 783x1024 13 HiVHF 2-Bay Bowtie - 10 Refl Rods 3D View enlarge 198KB, 1024x678 14 HiVHF 2-Bay Bowtie - 10 Refl Rods Front View - 42.875-in H x 58.5-in W. [1 big square = 12.5 inches] enlarge 97KB, 394x1024 15 HiVHF 2-Bay Bowtie - 10 Refl Rods Top View [1 big square = 12.5 inches] enlarge 187KB, 1152x685 16 HiVHF 2-Bay Bowtie - 10 Refl Rods Hi-VHF Raw Gain = 10.9 to 13.1 dBi Hi-VHF F/B & F/R Ratio Minimum = 15.3 dB enlarge 203KB, 1152x685 17 HiVHF 2-Bay Bowtie - 10 Refl Rods Hi-VHF SWR (300-ohms) Under 2.4 enlarge 234KB, 1152x685 18 HiVHF 2-Bay Bowtie - 10 Refl Rods Hi-VHF Impedance enlarge 304KB, 1024x1024 19 HiVHF 2-Bay Bowtie - 10 Refl Rods Azimuthal Pattern at 174 MHz enlarge 305KB, 1024x1024 20 HiVHF 2-Bay Bowtie - 10 Refl Rods Azimuthal Pattern at 198 MHz enlarge 307KB, 1024x1024 21 HiVHF 2-Bay Bowtie - 10 Refl Rods Azimuthal Pattern at 216 MHz enlarge 105KB, 348x1024 22 HiVHF 2-Bay Bowtie - 10 Refl Rods Front View [1 big square = 5 inches] enlarge 31KB, 791x1024 23 HiVHF 2-Bay Bowtie - 10 Refl Rods 4nec2 File enlarge 22KB, 791x1024 24 HiVHF 2-Bay Bowtie - 10 Refl Rods Contents of Python Control *.bat text File
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