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UHF Bi-Quad 9ReflRods - khaye
UHF Bi-Quad with 9 Reflector Rods (per khaye post) analyzed using 4nec2.

Element Diameter = 1/8-inch (AWG8), All Diamond Sides = 17 cm (6.7-in), Feedpoint Gap Size = 2 cm (0.78-in) [4nec2 model used 0.75-in]
Outer Angles = 45.0-deg, Inner Angles = 54.5-deg (would be 45-deg for zero Gap Size).  [AWG10 would slightly degrade SWR.]

9 Reflector Rods, 3/8-in Diameter, 40-cm (15.75-in) Long with 6-cm (2.36-in) Spacing, 14-cm (5.5-in) behind Bi-Quad.

Optimized for New UHF Band (Ch14-51), with Raw Gain & SWR degradation on highest channels.
Optimum size for Old UHF Band (Ch14-69) would be 16.3-cm (6.4-in) per side, shifting indicated performance at 770 up to 806 MHz.
Date(s): 13 Mar 2011. Album by holl_ands. 1 - 12 of 12 Total. 4106 Visits.
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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
3D View


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
Front View
[1 small box = 1.0 centimeter]


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
Side View
[1 small box = 1.0 centimeter]


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
UHF Raw Gain


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
UHF SWR (300-ohms)


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
UHF Impedance


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
Azimuthal Pattern at 470 MHz


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
Azimuthal Pattern at 590 MHz


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
Azimuthal Pattern at 698 MHz


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
Azimuthal Pattern at 806 MHz


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DOC11
UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
4nec2 File


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UHF Bi-Quad, 17-cm/side, 9 Reflector Rods
Top View
[1 small box = 1.0 centimeter]


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