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 holl_ands | Home > Multi-Bay Bowtie Antennas > UHF 2-Bay Bowties - NO Reflectors > 
UHF H2 (11x12) 2-Bay Bowtie - NO Refl
UHF H2 (11x12) 2-Bay Bowtie with No Reflector, OPTIMIZED for New UHF Band using nikiml's
Python Optimization Scripts.  Charts show significant improvement of H2 vs either M2 version.
Overall Dimensions: 20.0-in H x 21.75-in W

UHF Raw Gain = 7.3 to 10.3 dBi with SWR (300-ohms) under 3.0 (Good).
Hi-VHF Raw Gain = 2.4 to 2.8 dBi with SWR (300-ohms) = 12.4 to 6.7 is Excessive.

OPTIMIZED DIMENSIONS:
BowLen = 11.0 = Bowtie Whisker Half-Length,
ZBowII = 12.0 = Distance between the Centers of the two Bowties,
TineSep = 8.0 = Bowtie Tine Separation,
FedSep = 1.25 = Separation (in inches) between two FEEDLINE wires.
Date(s): 8 Feb 2015. Album by holl_ands. 1 - 20 of 20 Total. 3315 Visits.
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UHF H2 2-Bay Bowtie - No Refl.
3D View


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UHF H2 2-Bay Bowtie - No Refl.
Front View
WhiskerLength = 11-in, Bow Separation = 12-in,
Tine Separation = 8-in, Feedline Sep. = 1.25-in
[1 large square = 2.5 inches]


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DOC3
UHF H2 2-Bay Bowtie - No Refl.
4nec2 File Contains Dimensions


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UHF H2 2-Bay Bowtie - No Refl.
UHF Raw Gain = 7.3 to 10.3 dBi


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UHF H2 2-Bay Bowtie - No Refl.
UHF SWR (300-ohms) = 3.0


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UHF H2 2-Bay Bowtie - No Refl.
UHF Impedance


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UHF H2 2-Bay Bowtie - No Refl.
Azimuthal Pattern at 470 MHz


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UHF H2 2-Bay Bowtie - No Refl.
Azimuthal Pattern at 530 MHz


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UHF H2 2-Bay Bowtie - No Refl.
Azimuthal Pattern at 590 MHz


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UHF H2 2-Bay Bowtie - No Refl.
Azimuthal Pattern at 650 MHz


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UHF H2 2-Bay Bowtie - No Refl.
Azimuthal Pattern at 698 MHz


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UHF H2 2-Bay Bowtie - No Refl.
Azimuthal Pattern at 806 MHz


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UHF H2 2-Bay Bowtie - No Refl.
Hi-VHF Raw Gain = 2.4 to 2.8 dBi


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UHF H2 2-Bay Bowtie - No Refl.
Hi-VHF SWR (300-ohms) = 12.4 to 6.7
is Excessive


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UHF H2 2-Bay Bowtie - No Refl.
Hi-VHF Impedance


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UHF H2 2-Bay Bowtie - No Refl.
Azimuthal Pattern at 174 MHz


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UHF H2 2-Bay Bowtie - No Refl.
Azimuthal Pattern at 198 MHz


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UHF H2 2-Bay Bowtie - No Refl.
Azimuthal Pattern at 216 MHz


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M2 vs H2 vs RLH2 Comparison - No Refl
Raw Gain
H2 is Significant Improvement vs mclapp M2
RLH2's Hi-VHF Resonator Loop provides acceptable
Hi-VHF SWR at expense of lower Gain on Upper Channels


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UHF H2 2-Bay Bowtie - No Refl
Significant Improvement vs mclapp M2
(Inner Part of M4)


 
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