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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/
UHF Quadazoid Loop + Reflector UHF Quadazoid Loop with Reflector analyzed using 4nec2 after determining "best" Dimensions using nikiml's Python Optimizer Scripts. Note that OPTimized Dimensions WITH Reflector are somewhat DIFFERENT than without. Two different Reflector Types were analyzed: ####################################### a) Screen Grid Reflector = 24"H x 16"W with Grid = 2"H x 4"W. UHF Raw Gain = 9.8 to 10.4 to 9.8 dBi, F/B & F/R Gain Min. = 14.1 dB and SWR (300-ohms) Under 1.3...with Beamwidth = 71 to 67-deg, decreasing with Freq. So performance is very comparable to A-D C2. ####################################### b) 11 Reflector Rods: UHF Raw Gain = 10.0 to 11.0 to 10.2 dBi, F/B & F/R Gain Min. = 18.0 dB and SWR (300-ohms) Under 2.2...with Beamwidth = 66 to 56-deg, decreasing with Freq.. Higher Gain is likely due to significantly Wider Reflector. Date(s): 23 Mar 2018. Album by holl_ands. 1 - 42 of 42 Total. 1691 Visits.
enlarge 122KB, 759x1024 1 UHF Quadazoid Loop + 24"x16" Refl. 3D View Refl.-to-Quadazoid Separation = 5.13-in enlarge 301KB, 864x1024 2 UHF Quadazoid Loop + 24"x16" Refl. Front View [1 large square = 2.5-inches] enlarge 191KB, 591x1024 3 UHF Quadazoid Loop + 24"x16" Refl. Dimensions - JUST ACTIVE ELEMENTS [1 large square = 2.5-inches] enlarge 208KB, 1152x662 4 UHF Quadazoid Loop + 24"x16" Refl. UHF Raw Gain = 9.8 to 10.4 to 9.8 dBi UHF F/B & F/R Gain Min. = 14.1 dB enlarge 224KB, 1152x662 5 UHF Quadazoid Loop + 24"x16" Refl. UHF SWR (300-ohms) Under 1.3 enlarge 264KB, 1152x662 6 UHF Quadazoid Loop + 24"x16" Refl. UHF Impedance enlarge 343KB, 1024x1024 7 UHF Quadazoid Loop + 24"x16" Refl. Azimuthal Pattern at 470 MHz enlarge 344KB, 1024x1024 8 UHF Quadazoid Loop + 24"x16" Refl. Azimuthal Pattern at 530 MHz enlarge 344KB, 1024x1024 9 UHF Quadazoid Loop + 24"x16" Refl. Azimuthal Pattern at 590 MHz enlarge 344KB, 1024x1024 10 UHF Quadazoid Loop + 24"x16" Refl. Azimuthal Pattern at 650 MHz enlarge 344KB, 1024x1024 11 UHF Quadazoid Loop + 24"x16" Refl. Azimuthal Pattern at 698 MHz enlarge 339KB, 1024x1024 12 UHF Quadazoid Loop + 24"x16" Refl. Azimuthal Pattern at 806 MHz enlarge 337KB, 1024x1024 13 UHF Quadazoid Loop + 24"x16" Refl. Elevation Pattern at 470 MHz enlarge 338KB, 1024x1024 14 UHF Quadazoid Loop + 24"x16" Refl. Elevation Pattern at 530 MHz enlarge 338KB, 1024x1024 15 UHF Quadazoid Loop + 24"x16" Refl. Elevation Pattern at 590 MHz enlarge 338KB, 1024x1024 16 UHF Quadazoid Loop + 24"x16" Refl. Elevation Pattern at 650 MHz enlarge 339KB, 1024x1024 17 UHF Quadazoid Loop + 24"x16" Refl. Elevation Pattern at 698 MHz enlarge 341KB, 1024x1024 18 UHF Quadazoid Loop + 24"x16" Refl. Elevation Pattern at 806 MHz enlarge 34KB, 791x1024 19 UHF Quadazoid Loop + 24"x16" Refl. 4nec2 Text File, includes Dimensions enlarge 32KB, 791x1024 20 UHF Quadazoid Loop + 24"x16" Refl. EVAL Performance Results Text File enlarge 75KB, 791x1024 21 UHF Quadazoid Loop + 24"x16" Refl. EVAL Performance Summary *.html File enlarge 118KB, 893x1024 22 UHF Quadazoid Loop + 11RR's 3D View Refl.-to-Quadazoid Separation = 3.54-in enlarge 274KB, 1024x1010 23 UHF Quadazoid Loop + 11RR's Front View [1 large square = 2.5-inches] enlarge 103KB, 408x1024 24 UHF Quadazoid Loop + 11RR's Top View [1 large square = 2.5-inches] enlarge 186KB, 1152x662 25 UHF Quadazoid Loop + 11RR's UHF Raw Gain = 10.0 to 11.0 to 10.2 dBi UHF F/B & F/R Gain Min. = 18.0 dB enlarge 194KB, 1152x662 26 UHF Quadazoid Loop + 11RR's UHF SWR (300-ohms) Under 2.2 enlarge 232KB, 1152x662 27 UHF Quadazoid Loop + 11RR's enlarge 299KB, 1024x1024 28 UHF Quadazoid Loop + 11RR's Azimuthal Pattern at 470 MHz enlarge 298KB, 1024x1024 29 UHF Quadazoid Loop + 11RR's Azimuthal Pattern at 530 MHz enlarge 299KB, 1024x1024 30 UHF Quadazoid Loop + 11RR's Azimuthal Pattern at 590 MHz enlarge 298KB, 1024x1024 31 UHF Quadazoid Loop + 11RR's Azimuthal Pattern at 650 MHz enlarge 297KB, 1024x1024 32 UHF Quadazoid Loop + 11RR's Azimuthal Pattern at 698 MHz enlarge 296KB, 1024x1024 33 UHF Quadazoid Loop + 11RR's Azimuthal Pattern at 806 MHz enlarge 293KB, 1024x1024 34 UHF Quadazoid Loop + 11RR's Elevation Pattern at 470 MHz enlarge 295KB, 1024x1024 35 UHF Quadazoid Loop + 11RR's Elevation Pattern at 530 MHz enlarge 295KB, 1024x1024 36 UHF Quadazoid Loop + 11RR's Elevation Pattern at 590 MHz enlarge 296KB, 1024x1024 37 UHF Quadazoid Loop + 11RR's Elevation Pattern at 650 MHz enlarge 298KB, 1024x1024 38 UHF Quadazoid Loop + 11RR's Elevation Pattern at 698 MHz enlarge 296KB, 1024x1024 39 UHF Quadazoid Loop + 11RR's Elevation Pattern at 806 MHz enlarge 29KB, 791x1024 40 UHF Quadazoid Loop + 11RR's 4nec2 Text File, includes Dimensions enlarge 32KB, 791x1024 41 UHF Quadazoid Loop + 11RR's EVAL Performance Results Text File enlarge 73KB, 791x1024 42 UHF Quadazoid Loop + 11RR's EVAL Performance Summary *.html File
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