UHF Twin-Hoop Chireix with NO or 26 Reflector Rods analyzed using 4nec2. Used SAME 4nec2 file as Hi-VHF & UHF "Figure-8" Twin Loop, except cut out 1-in Gaps at Top and Bottom of the Hoops.
No doubt due to the much larger size (12.5 vs 9.1-inch), this significantly improved the New UHF Band Gain. A smaller (10.8-in) diameter would be better for Old UHF Band (up to Ch69).
EDIT (5Sep2011): Added NO Reflector version, optimized for New UHF Band.
UHF Raw Gain = 6.8 to 10.0 dBi and SWR (300-ohms) Under 3.0 (A Bit High).
Date(s): 18 Aug 2010. Album by holl_ands. 1 - 30 of 30 Total. 22297 Visits.
enlarge 64KB, 769x1024 1 UHF Twin-Hoop Chireix with NO Reflector 3D View "Thank you for these diagrams but you..." View Comments...
enlarge 165KB, 595x1024 2 UHF Twin-Hoop Chireix with NO Reflector Diameter=12.5-in with Quarter-Inch Copper Tubing Front View [1 small box = 0.5-inch] [1 big box = 2.5-inch] "Thank you for these diagrams but you..." View Comments...
enlarge 283KB, 1024x696 3 Twin-Hoop Chireix vs "Figure-8" Twin-Loop vs Shorted-Bowtie-Loop (SBL) vs 2-Bay Hentenna vs 6-Whisker Bowtie vs Single Loop. In decreasing UHF Gain order.
enlarge 133KB, 1152x638 4 UHF Twin-Hoop Chireix with NO Reflector UHF Raw Gain = 6.8 to 10.0 dBi
enlarge 187KB, 1152x638 5 UHF Twin-Hoop Chireix with NO Reflector UHF SWR (300-Ohms) Under 3.0 (A Bit High]
enlarge 169KB, 1152x638 6 UHF Twin-Hoop Chireix with NO Reflector UHF Impedance for QICT
enlarge 319KB, 1024x1024 7 UHF Twin-Hoop Chireix with NO Reflector Azimuthal Pattern on 470 MHz
enlarge 315KB, 1024x1024 8 UHF Twin-Hoop Chireix with NO Reflector Azimuthal Pattern on 590 MHz
enlarge 319KB, 1024x1024 9 UHF Twin-Hoop Chireix with NO Reflector Azimuthal Pattern on 698 MHz
enlarge 129KB, 752x1024 10 Twin Hoop Chireix (New UHF Band) - 3D View with 26 Reflector Rods
enlarge 307KB, 1024x1022 11 Twin Hoop Chireix (New UHF Band) - Front View with 26 Reflector Rods Diameter =12.5, Quarter-Inch Copper Tubing (QICT) [1 small box = 0.5-inch]
enlarge 91KB, 335x1024 12 Twin Hoop Chireix (New UHF Band) - Side View with 26 Reflector Rods Separation=5.5-in [1 small box = 0.5-inch]
enlarge 156KB, 1024x648 13 Twin Hoop Chireix with 26 Reflector Rods New UHF Band Raw Gain, Max = 13.2 dBi
enlarge 175KB, 1024x648 14 Twin Hoop Chireix with 26 Reflector Rods New UHF Band Raw Gain, SWR under 2.4
enlarge 144KB, 1024x648 15 Twin Hoop Chireix with 26 Reflector Rods New UHF Band Impedance
enlarge 305KB, 1024x1024 16 Twin Hoop Chireix (New UHF Band) with 26 Reflector Rods UHF Azimuthal Pattern at 470 MHz
enlarge 305KB, 1024x1024 17 Twin Hoop Chireix (New UHF Band) with 26 Reflector Rods UHF Azimuthal Pattern at 590 MHz
enlarge 305KB, 1024x1024 18 Twin Hoop Chireix (New UHF Band) with 26 Reflector Rods UHF Azimuthal Pattern at 698 MHz
enlarge 127KB, 765x1024 19 Twin Hoop Chireix (Old UHF Band) - 3D View with 26 Reflector Rods
enlarge 296KB, 1024x1008 20 Twin Hoop Chireix (Old UHF Band) - Front View with 26 Reflector Rods Diameter =11.25, Quarter-Inch Copper Tubing (QICT) [1 small box = 0.5-inch]
enlarge 87KB, 310x1024 21 Twin Hoop Chireix (Old UHF Band) - Side View with 26 Reflector Rods Separation=5.5-in [1 small box = 0.5-inch]
enlarge 141KB, 1024x648 22 Twin Hoop Chireix with 26 Reflector Rods Old UHF Band Raw Gain, Max = 12.3 dBi
enlarge 166KB, 1024x648 23 Twin Hoop Chireix with 26 Reflector Rods Old UHF Band SWR under 2.8
enlarge 148KB, 1024x648 24 Twin Hoop Chireix with 26 Reflector Rods Old UHF Band Impedance
enlarge 305KB, 1024x1024 25 Twin Hoop Chireix (Old UHF Band) with 26 Reflector Rods UHF Azimuthal Pattern at 470 MHz
enlarge 309KB, 1024x1024 26 Twin Hoop Chireix (Old UHF Band) with 26 Reflector Rods UHF Azimuthal Pattern at 698 MHz
enlarge 303KB, 1024x1024 27 Twin Hoop Chireix (Old UHF Band) with 26 Reflector Rods UHF Azimuthal Pattern at 806 MHz
enlarge 29KB, 791x1024 28 UHF Twin-Hoop Chireix with NO Reflector 4nec2 File
enlarge 30KB, 791x1024 29 Twin Hoop Chireix (for New UHF Band) with 26 Reflector Rods 4nec2 File
enlarge 30KB, 791x1024 30 Twin Hoop Chireix (for Old, Full UHF Band) with 26 Reflector Rods 4nec2 File
