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holl_ands | Home > Multi-Bay Bowtie Antennas > UHF 4-Bay Bowties with Reflector > Browse:Ch22 FF4 4-Bay Bowtie + DARNEW UHF Free-Form 4-Bay + FlatScreenReflUHF Free-Form 4-Bay + DblAnglReflUHF FF4 SingleAngleRefl - DeepSidelobesUHF M4 (10x9.5) Super-4-Bay+DARUHF M4 (9.5x9.0)+DAR Flat vs Swept BowsM4 (9.5x9.0)+DAR Flat v Swept BowsM4 (9.5x9) + Various FLAT Refl. WidthsM4 (9.5x9.0) + 40x34 FLAT Refl at 5-inUHF M4 (9.5x9.0) 4-Bay+FLAT Grid at 5.5"UHF M4 (9.5x9.0) 4-Bay+FLAT Grid at 16"M4 (9.5x9) + Various Number of RRs - OPTUHF KosmicSuperQuad+DAR FlatvsSwept BowsUHF Actual CM4221 Flat Bows & ReflectorUHF CM4221a.ez.nec Flat Bows & ReflectorUHF CM4221HD (Hacked) - 16 ReflRodsUHF CM-4221HD - 10-in WhiskersUHF CM4221HD (Hacked) + Director RodsCM4221HD (Hacked) + Stub FilterAntennacraft U-4000 - 9 Reflector RodsA-D Old DB-4 4-Bay Bowtie with Reflector
M4 (9.5x9.0)+DAR Flat v Swept Bows All AWG10 mclapp M4 4-Bay (9.5x9.0) with FLAT vs SWEPT Bowties and Double Angled Reflector analyzed to determine Optimum Forward Sweep (BowSwp=1.0-in), presuming the use of AWG10 for ALL elements and feedlines. mclapp's M4 (9-5x9) Super-4-Bay Bowtie, with Angled Reflector, optimized for New UHF Band (Ch14-51): http://www.frontiernet.net/~mclapp/Antennas/diagrams.html http://www.frontiernet.net/~mclapp/Antennas/4baystuff/4%20bay%20angled%20reflector.pdf FYI: Performance comparisons (With Reflectors): http://www.frontiernet.net/~mclapp/Antennas/plots/Antenna%20plots%20with%20reflectors%20UHF.gif http://www.frontiernet.net/~mclapp/Antennas/plots/4%20bay%20compare11-23-08.xls BowLength = 9.5-in, Inner-Inner Bowtie Spacing = 9.0-in, Inner-Outer Bowtie Spacing = 9.0, Tine Separation = 5.5-in, Feedline Separation = 1.25-in, with 1.0-in at Crossover. Double Angled Screen Reflector, 16-Gauge, 40"Hx36"W, with outer 10-in bent forward, Grid = 1"H x 2"W. Separation of Reflector from Bowties=4.5-in (at centerline). Gain and SWR are Good for entire New UHF Band, with only moderate reduction for Old Band (Ch52-69). Optimum Bow Sweep is about 1-in. Hi-VHF Ch7-8 has moderate Net Gain loss due to increasing SWR, which becomes excessive on Ch9-13. Although there is minimal Raw Gain on Ch6 and FM Band, SWR is extremely high. Date(s): 13 Apr 2010. Album by holl_ands. 1 - 25 of 25 Total. 4967 Visits.
enlarge 170KB, 636x1024 1 M4 4-Bay (9.5x9.0) with SWEPT Bowties - 3D View enlarge 222KB, 1024x689 2 M4 4-Bay (9.5x9.0) FLAT vs SWEPT Bowties If ALL AWG10: UHF Raw and Net Gain enlarge 221KB, 1024x696 3 M4 4-Bay (9.5x9.0) FLAT vs SWEPT Bowties If ALL AWG10: UHF F/R and F/B Ratios enlarge 279KB, 952x1024 4 M4 4-Bay (9.5x9.0) with SWEPT Bowties - Front View [1 small square = 0.5-inch] enlarge 69KB, 278x1024 5 M4 4-Bay (9.5x9.0) with SWEPT Bowties - Side View [1 small square = 0.5-inch] enlarge 56KB, 315x1024 6 M4 4-Bay (9.5x9.0) with SWEPT Bowties - Top View [1 small square = 0.5-inch] enlarge 106KB, 1024x648 7 M4 4-Bay (9.5x9.0) with SWEPT Bowties - All AWG10 UHF Raw Gain enlarge 131KB, 1024x648 8 M4 4-Bay (9.5x9.0) with SWEPT Bowties - All AWG10 UHF SWR (300-ohms) enlarge 121KB, 1024x648 9 M4 4-Bay (9.5x9.0) with SWEPT Bowties - All AWG10 UHF Impedance enlarge 247KB, 1024x1024 10 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Azimuthal Pattern at 470 MHz enlarge 247KB, 1024x1024 11 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Azimuthal Pattern at 590 MHz enlarge 248KB, 1024x1024 12 M4 4-Bay (9.5x9.0) with SWEPT Bowties UHF Azimuthal Pattern at 698 MHz enlarge 105KB, 1024x648 13 M4 4-Bay (9.5x9.0) with SWEPT Bowties - All AWG10 Hi-VHF Raw Gain enlarge 128KB, 1024x648 14 M4 4-Bay (9.5x9.0) with SWEPT Bowties - All AWG10 Hi-VHF SWR (300-ohms) enlarge 118KB, 1024x648 15 M4 4-Bay (9.5x9.0) with SWEPT Bowties - All AWG10 Hi-VHF Impedance enlarge 252KB, 1024x1024 16 M4 4-Bay (9.5x9.0) with SWEPT Bowties Hi-VHF Azimuthal Pattern at 174 MHz enlarge 252KB, 1024x1024 17 M4 4-Bay (9.5x9.0) with SWEPT Bowties Hi-VHF Azimuthal Pattern at 198 MHz enlarge 254KB, 1024x1024 18 M4 4-Bay (9.5x9.0) with SWEPT Bowties Hi-VHF Azimuthal Pattern at 216 MHz enlarge 106KB, 1024x648 19 M4 4-Bay (9.5x9.0) with SWEPT Bowties - All AWG10 Ch2-FM Band Raw Gain enlarge 139KB, 1024x648 20 M4 4-Bay (9.5x9.0) with SWEPT Bowties - All AWG10 Ch2-FM Band SWR (300-ohms) enlarge 111KB, 1024x648 21 M4 4-Bay (9.5x9.0) with SWEPT Bowties - All AWG10 Ch2-FM Band Impedance enlarge 252KB, 1024x1024 22 M4 4-Bay (9.5x9.0) with SWEPT Bowties Ch2 Azimuthal Pattern enlarge 252KB, 1024x1024 23 M4 4-Bay (9.5x9.0) with SWEPT Bowties Ch5 Azimuthal Pattern enlarge 255KB, 1024x1024 24 M4 4-Bay (9.5x9.0) with SWEPT Bowties FM Band Azimuthal Pattern enlarge 142KB, 791x1024 25 M4 4-Bay (9.5x9.0) with SWEPT Bowties ALL AWG10 - 4nec2 File
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