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UHF Bi-Quad + 11RR - OPT
UHF Bi-Quad with 11 Reflector Rods analyzed using 4nec2 after determining dimensions using
nikiml's Python Optimization Scripts.

UHF Raw Gain = 9.8 to 11.1 dBi, F/B & F/R Ratio Min. = 18.4 dB and SWR (300-ohms) Under 2.5.
Hi-VHF Raw Gain = 5.0 to 5.7 dBi, F/B & F/R Ratio = 2 to 14 dB and SWR (300-ohms) = 773 to 133 is Excessive

SUMMARY OF DIMENSIONS:
Feedline Separation = 2*feed = 1.0-in,
Y-Coord of Outer Apex=y1 = 5.125-in,
Z-Coord of Outer Apex = z1 = 6.0-in,
Z-Distance from Outer Apex to Top = z2 = 3.0-in,
ALL Elements AWG10 & RR QICT,
RR Separation behind Hourglass = 4.25-in,
Reflector Rod-to-Rod Separation = 2.125-in,
RR Half-Lengths = 10.0-in.
Date(s): 6 Mar 2015. Album by holl_ands. 1 - 21 of 21 Total. 6778 Visits.
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UHF Bi-Quad + 11RR - OPT
3D View


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UHF Bi-Quad + 11RR - OPT
Front View
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UHF Bi-Quad + 11RR - OPT
Top View
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UHF Bi-Quad + 11RR - OPT
UHF Raw Gain = 9.8 to 11.1 dBi
UHF F/B & F/R Ratio Minimum = 18.4 dB


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UHF Bi-Quad + 11RR - OPT
UHF SWR (300-ohms) Under 2.5


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UHF Bi-Quad + 11RR - OPT
UHF Impedance


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 470 MHz


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 530 MHz


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 590 MHz


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 650 MHz


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 698 MHz


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 758 MHz


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 806 MHz


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DOC14
UHF Bi-Quad + 11RR - OPT
4nec2 File contains Summary of Dimensions


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UHF Bi-Quad + 11RR - OPT
Side View
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UHF Bi-Quad + 11RR - OPT
Hi-VHF Raw Gain = 5.0 to 5.7 dBi
Hi-VHF F/B & F/R Ratio = 2 to 14 dB


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UHF Bi-Quad + 11RR - OPT
Hi-VHF SWR (300-ohms) = 773 to 133
is Excessive


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UHF Bi-Quad + 11RR - OPT
Hi-VHF Impedance


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 174 MHz


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 198 MHz


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UHF Bi-Quad + 11RR - OPT
Azimuthal Pattern at 216 MHz


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