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UHF Twin-Hoop Chireix - NO or 26ReflRods
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. 18831 Visits.
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UHF Twin-Hoop Chireix with NO Reflector
3D View

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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]

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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.


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UHF Twin-Hoop Chireix with NO Reflector
UHF Raw Gain = 6.8 to 10.0 dBi


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UHF Twin-Hoop Chireix with NO Reflector
UHF SWR (300-Ohms) Under 3.0 (A Bit High]


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UHF Twin-Hoop Chireix with NO Reflector
UHF Impedance for QICT


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UHF Twin-Hoop Chireix with NO Reflector
Azimuthal Pattern on 470 MHz


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UHF Twin-Hoop Chireix with NO Reflector
Azimuthal Pattern on 590 MHz


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9
UHF Twin-Hoop Chireix with NO Reflector
Azimuthal Pattern on 698 MHz


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Twin Hoop Chireix (New UHF Band) - 3D View
with 26 Reflector Rods


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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]


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Twin Hoop Chireix (New UHF Band) - Side View
with 26 Reflector Rods
Separation=5.5-in
[1 small box = 0.5-inch]


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Twin Hoop Chireix with 26 Reflector Rods
New UHF Band Raw Gain, Max = 13.2 dBi


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Twin Hoop Chireix with 26 Reflector Rods
New UHF Band Raw Gain, SWR under 2.4


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Twin Hoop Chireix with 26 Reflector Rods
New UHF Band Impedance


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Twin Hoop Chireix (New UHF Band)
with 26 Reflector Rods
UHF Azimuthal Pattern at 470 MHz


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Twin Hoop Chireix (New UHF Band)
with 26 Reflector Rods
UHF Azimuthal Pattern at 590 MHz


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Twin Hoop Chireix (New UHF Band)
with 26 Reflector Rods
UHF Azimuthal Pattern at 698 MHz


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Twin Hoop Chireix (Old UHF Band) - 3D View
with 26 Reflector Rods


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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]


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Twin Hoop Chireix (Old UHF Band) - Side View
with 26 Reflector Rods
Separation=5.5-in
[1 small box = 0.5-inch]


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Twin Hoop Chireix with 26 Reflector Rods
Old UHF Band Raw Gain, Max = 12.3 dBi


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Twin Hoop Chireix with 26 Reflector Rods
Old UHF Band SWR under 2.8


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Twin Hoop Chireix with 26 Reflector Rods
Old UHF Band Impedance


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Twin Hoop Chireix (Old UHF Band)
with 26 Reflector Rods
UHF Azimuthal Pattern at 470 MHz


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Twin Hoop Chireix (Old UHF Band)
with 26 Reflector Rods
UHF Azimuthal Pattern at 698 MHz


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Twin Hoop Chireix (Old UHF Band)
with 26 Reflector Rods
UHF Azimuthal Pattern at 806 MHz


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DOC28
UHF Twin-Hoop Chireix with NO Reflector
4nec2 File


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DOC29
Twin Hoop Chireix (for New UHF Band)
with 26 Reflector Rods
4nec2 File


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DOC30
Twin Hoop Chireix (for Old, Full UHF Band)
with 26 Reflector Rods
4nec2 File


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Easy to build, two hoops - I'll try it, thanks!
 - 
DANIEL SCHMIDT, Sat, 14 May 2016 8:40PM