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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) + 40x34 FLAT Refl at 5-in M4 (9.5x9.0) Super-4-Bay Bowtie (all AWG10) with 40-in H x 34-in W FLAT Screen Grid (1x2-in) at Various Reflector-To-Bowtie Separations analyzed using 4nec2. [In previous analysis, 40x34-in Reflector was found to be the "Best" size.] "Best" UHF Performance is at Separation = 5.0-in, with acceptable SWR Under 2.7 [Max Criteria for low Mis-Match and EVM Loss] with F/B & F/R Ratios over 20 dB. UHF Raw Gain = 13.3 to 14.9 dBi, F/B & F/R Ratio Min = 19.8 dB and SWR (300-ohms) under 2.7. Hi-VHF Raw Gain = 8.7 to 8.9 dBi, F/B & F/R = 10 to 16 dB and SWR (300-ohms) = 4.1 to 14.1. Date(s): 7 Nov 2013. Album by holl_ands. 1 - 22 of 22 Total. 9271 Visits.
enlarge 204KB, 730x1024 1 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in 3D View enlarge 319KB, 870x1024 2 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Front View [1 large square = 5 inches] enlarge 97KB, 311x1024 3 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Top View [1 large square = 2.5 inches] enlarge 175KB, 1152x691 4 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in UHF Raw Gain = 13.3 to 14.9 dBi UHF F/B & F/R Ratio Min = 19.8 dB enlarge 192KB, 1152x691 5 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in UHF SWR (300-ohms) Under 2.7 enlarge 243KB, 1152x691 6 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in UHF Impedance enlarge 302KB, 1024x1024 7 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 470 MHz enlarge 300KB, 1024x1024 8 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 530 MHz enlarge 301KB, 1024x1024 9 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 590 MHz enlarge 302KB, 1024x1024 10 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 650 MHz enlarge 304KB, 1024x1024 11 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 698 MHz enlarge 305KB, 1024x1024 12 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 758 MHz enlarge 301KB, 1024x1024 13 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 806 MHz enlarge 134KB, 791x1024 14 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in 4nec2 File enlarge 94KB, 386x1024 15 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Side View [1 large square = 5 inches] enlarge 164KB, 1152x691 16 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Hi-VHF Raw Gain = 8.7 to 8.9 dBi Hi-VHF F/B & F/R = 10 to 16 dB enlarge 219KB, 1152x691 17 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Hi-VHF SWR (300-ohms) = 4.1 to 14.1 enlarge 250KB, 1152x691 18 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Hi-VHF Impedance enlarge 304KB, 1024x1024 19 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 174 MHz enlarge 304KB, 1024x1024 20 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 198 MHz enlarge 308KB, 1024x1024 21 M4 (9.5x9.0) + FLAT 40x34 Refl at 5-in Azimuthal Pattern at 216 MHz enlarge 220KB, 1024x696 22 M4 (9.5x9.0) + FLAT 40x34 Refl UHF Raw Gain for Refl-Bowtie Separations which provide POOR Performance
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