NEW-UHF [470-608 MHz] Free-Form 6-Bay Bowtie (FF6) with NO Reflector Analyzed using 4nec2 after determining BEST Dimensions using nikiml's Python Optimization Scripts.
New UHF Band Raw Gain = 12.2 to 14.0 dBi with SWR (300-ohms) under 2.5. Hi-VHF Raw Gain = 5.8 to 4.6 dBi with SWR (300-ohms) = 3.3 to 2.6 to 3.5 is a bit High.
DIMENSION STATEMENTS: [May Round to nearest 1/4-in] ' Radius (in inches) of BOWTIE elements: SY Rbow=0.051 [AWG10] ' Radius (in inches) of FEEDLINE wires: SY Rfeed=0.051 [AWG10] ' Separation at Crossover: SY Hop=1.0 ' Conductivity (Copper=3.0e7, Alum=2.0e7, StainlessSteel=1.67e7: SY Cond=3e+07 ' Distance between the centers of the two INNER bowties: SY ZBowII=14.18 ' From center of INNER bowtie to center of OUTER bowtie: SY ZBowOI=12.41 ' From center of OUTER bowtie to center of EXTERIOR bowtie: SY ZBowOE=10.53 ' INNER Bow Whisker Length (lose some in bend): SY BowLeni=13.27 ' OUTER Bow Whisker Length (lose some in bend): SY BowLeno=9.37 ' EXTERIOR Bow Whisker Length (lose some in bend): SY BowLenE=8.95 ' INNER Bow Forward Sweep distance at tip of the whisker: SY BowSwpi=0.0 [Not used in this Model] ' OUTER Bow Forward Sweep distance at tip of the whisker: SY BowSwpo=0.0 [Not used in this Model] ' EXTERIOR Bow Forward Sweep distance at tip of the whisker: SY BowSwpE=0.0 [Not used in this Model] ' INNER Bow Tine Separation: SY TineSepi=8.38 ' OUTER Bow Tine Separation: SY TineSepo=6.91 ' EXTERIOR Bow Tine Separation: SY TineSepE=5.61 ' Separation between two FEEDLINE wires: [CONSTRAINT: TRY ALL THE SAME.] SY FeedSep=3.11 ' From center of Feedline Cross-Over to center of OUTER Bowtie: SY ZCross=1.25 ' From center of Feedline Cross-Over to center of EXTERIOR Bowtie: SY ZCrossE=2.32
UPDATE (17Aug2019): Added Dimension Statements.
Date(s): 26 Aug 2017. Album by holl_ands. 1 - 31 of 31 Total. 3578 Visits.
enlarge 87KB, 595x1024 1 New UHF FF6 No Refl - OPT 3D View
enlarge 207KB, 524x1024 2 New UHF FF6 No Refl - OPT Front View [1 large square = 5-inches]
enlarge 100KB, 303x1024 3 New UHF FF6 No Refl - OPT Top View [1 large square = 2.5-inches]
enlarge 202KB, 1152x662 4 New UHF FF6 No Refl - OPT New UHF Band Raw Gain = 12.2 to 14.0 dBi
enlarge 237KB, 1152x662 5 New UHF FF6 No Refl - OPT New UHF Band SWR (300-ohms) Under 2.5
enlarge 279KB, 1152x662 6 New UHF FF6 No Refl - OPT UHF Band Impedance
enlarge 366KB, 1024x966 7 New UHF FF6 No Refl - OPT Azimuthal Pattern at 470 MHz
enlarge 365KB, 1024x966 8 New UHF FF6 No Refl - OPT Azimuthal Pattern at 530 MHz
enlarge 364KB, 1024x966 9 New UHF FF6 No Refl - OPT Azimuthal Pattern at 590 MHz
enlarge 367KB, 1024x966 10 New UHF FF6 No Refl - OPT Azimuthal Pattern at 608 MHz
enlarge 366KB, 1024x966 11 New UHF FF6 No Refl - OPT Azimuthal Pattern at 650 MHz
enlarge 368KB, 1024x966 12 New UHF FF6 No Refl - OPT Azimuthal Pattern at 698 MHz
enlarge 358KB, 1024x966 13 New UHF FF6 No Refl - OPT Elevation Pattern at 470 MHz
enlarge 359KB, 1024x966 14 New UHF FF6 No Refl - OPT Elevation Pattern at 530 MHz
enlarge 354KB, 1024x966 15 New UHF FF6 No Refl - OPT Elevation Pattern at 590 MHz
enlarge 357KB, 1024x966 16 New UHF FF6 No Refl - OPT Elevation Pattern at 608 MHz
enlarge 356KB, 1024x966 17 New UHF FF6 No Refl - OPT Elevation Pattern at 650 MHz
enlarge 363KB, 1024x966 18 New UHF FF6 No Refl - OPT Elevation Pattern at 698 MHz
enlarge 187KB, 1152x662 19 New UHF FF6 No Refl - OPT Hi-VHF Raw Gain = 5.8 to 4.6 dBi
enlarge 224KB, 1152x662 20 New UHF FF6 No Refl - OPT Hi-VHF SWR (300-ohms) = 3.3 to 2.6 to 3.5 is a bit High
enlarge 253KB, 1152x662 21 New UHF FF6 No Refl - OPT Hi-VHF Band Impedance
enlarge 377KB, 1024x966 22 New UHF FF6 No Refl - OPT Azimuthal Pattern at 174 MHz
enlarge 372KB, 1024x966 23 New UHF FF6 No Refl - OPT Azimuthal Pattern at 198 MHz
enlarge 371KB, 1024x966 24 New UHF FF6 No Refl - OPT Azimuthal Pattern at 216 MHz
enlarge 369KB, 1024x966 25 New UHF FF6 No Refl - OPT Elevation Pattern at 174 MHz
enlarge 361KB, 1024x966 26 New UHF FF6 No Refl - OPT Elevation Pattern at 198 MHz
enlarge 365KB, 1024x966 27 New UHF FF6 No Refl - OPT Elevation Pattern at 216 MHz
enlarge 28KB, 791x1024 28 New UHF FF6 No Refl - OPT 4nec2 File, incl. Dimensions
enlarge 38KB, 791x1024 29 New UHF FF6 No Refl - OPT EVAL Results Summary Text File
enlarge 39KB, 791x1024 30 New UHF FF6 No Refl - OPT EVAL Performance Summary *.html File
enlarge 95KB, 263x1024 31 New UHF FF6 No Refl - OPT Side View [1 large square = 5-inches]
