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holl_ands | Home > Loop Antennas incl Folded Dipole > Browse:Compare LoopsWi-Fi Folded Dipole - 2400-2500 MHzUHF Folded & Tri-Folded DipolesHi-VHF+UHF "VEE" Folded DipoleUHF Circular & Square Loops NO ReflectorUHF "Figure-8" Twin Loops - NO ReflUHF "Figure-8" Twin-Loops + xxRR - OPTHi-VHF Figure-8 Twin Loops - NO ReflUHF Twin-Hoop Chireix - NO or 26ReflRodsHi-VHF+UHF Tapered Loop - A-D C2 & C2-VHi-VHF+UHF Tapered DoubleLoop - d510d180UHF Shorted Bowtie Loop (SBL)Hi-VHF+UHF Bowtie-In-Loop - NO ReflectorHi-VHF+UHF Bowtie-In-Loop + 11RR - OPTHi-VHF+UHF Bowtie-In-Loop (DblAngRefl)HiVHF+UHF DreamcatcherU+H 2-Bay Hentenna NO+11ReflRodsUHF Hourglass LoopUHF Quad-Trapezoid-LoopUHF Quad-Trapezoid-Loop+2xBarsUHF Quadazoid Loop - No ReflUHF Quadazoid Loop + ReflectorHi-VHF Folded DipolesHi-VHF Circular Loop + ReflectorHi-VHF Square Loop + ReflectorHiVHF Shorted Bowtie Loop (NO Reflector)Hi-VHF Shorted Bowtie Loop (w Reflector)Hi-VHF Hourglass LoopHi-VHF Quad-Trapezoid-LoopHi-VHF Quad-Trapezoid-Loop+2Bars - OPTLo-VHF Tri-Folded Dipoles - OPTLo-VHF 2-Bay Folded Dipole - OPTVHF Square & Circular LoopsLo-VHF Folded DipolesLoVHF Hourglass-Loop - No ReflectorLoVHF+FM Hourglass LoopLoVHF Hourglass-Loop + 3 ReflRodsLoVHF Hourglass-Loop + 5 ReflRodsHi-VHF (+UHF) Twin Rectangular LoopsHiVHF+UHF RL-M2 2-Bay+Loop - NO Refl.H+U 2-Bay+Loop RLH2 (12x10) - NO ReflH+U 2-Bay+Loop RLH2 (10.5x8.7) - NO ReflH+U 4-Bay Loop RLH4 - No ReflHiVHF+UHF 2Square-Chireix-In-Rect. LoopHi-VHF+UHF In 3-ftx2-ft Picture Frame/
Lo-VHF 2-Bay Folded Dipole - OPT Lo-VHF 2-Bay Folded Dipoles analyzed using 4nec2. FYI: Ch6 Center Freq = 85 MHz so 1/2-WL = 69.43-in. ###################################### a) Ch6 2-Bay Folded Dipole [using AWG10] with "best" Dimensions determined using nikiml's Python Optimization Scripts: L2 = 65.21-in = Folded Dipole Overall Element Length [OPTimized] HS = 84.11-in =  Height Separation between Folded Dipoles [OPTimized, Max=100-in] FS = 1.01-in = Feedline Separation [OPTimized] Gap = Gap Size = FS [CROSS-BAR CONSTRAINT] FW = 2-in = Separation between FD Elements [CONSTRAINT] RACT = Rfeed = 0.051 [All AWG10] Ch6 (82-88 MHz) Raw Gain = 6.4 to 6.6 to 6.4 dBi and SWR (300-ohms) = 1.8 to 1.6 to 2.1. ###################################### b) Same, except Half-Wavelength Dimensions, i.e. L2+FW = HS = 1/2-WL = 69.43-in. Somewhat lower Gain, SWR still Excellent. Ch6 (82-88 MHz) Raw Gain = 5.9 to 6.3 dBi and SWR (300-ohms) = 2.0 to 1.6 to 2.0. Date(s): 9 May 2018. Album by holl_ands. 1 - 14 of 14 Total. 1482 Visits.
enlarge 41KB, 710x1024 1 Ch6 2-Bay Folded Dipole - OPT 3D View enlarge 188KB, 768x1024 2 Ch6 2-Bay Folded Dipole - OPT Front View [1 large square = 12.5-inches] enlarge 28KB, 791x1024 3 Ch6 2-Bay Folded Dipole - OPT 4nec2 text File includes Dimensions enlarge 144KB, 1024x645 4 Ch6 2-Bay Folded Dipole - OPT Ch6 (82-88 MHz) Raw Gain = 6.4 to 6.6 to 6.4 dBi enlarge 180KB, 1024x645 5 Ch6 2-Bay Folded Dipole - OPT Ch6 (82-88 MHz) SWR (300-ohms) = 1.8 to 1.6 to 2.1 enlarge 216KB, 1024x645 6 Ch6 2-Bay Folded Dipole - OPT Ch6 (82-88 MHz) Impedance enlarge 319KB, 1024x1024 7 Ch6 2-Bay Folded Dipole - OPT Azimuthal Pattern at 82 MHz enlarge 318KB, 1024x1024 8 Ch6 2-Bay Folded Dipole - OPT Azimuthal Pattern at 85 MHz enlarge 318KB, 1024x1024 9 Ch6 2-Bay Folded Dipole - OPT Azimuthal Pattern at 88 MHz enlarge 319KB, 1024x1024 10 Ch6 2-Bay Folded Dipole - OPT Elevation Pattern at 82 MHz enlarge 317KB, 1024x1024 11 Ch6 2-Bay Folded Dipole - OPT Elevation Pattern at 85 MHz enlarge 319KB, 1024x1024 12 Ch6 2-Bay Folded Dipole - OPT Elevation Pattern at 88 MHz enlarge 28KB, 791x1024 13 Ch6 2-Bay Folded Dipole - OPT EVAL Performance Summary text File enlarge 43KB, 791x1024 14 Ch6 2-Bay Folded Dipole - OPT EVAL Performance Summary *.html
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