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 holl_ands | Home > Loop Antennas incl Folded Dipole > 
Hi-VHF+UHF "VEE" Folded Dipole
Hi-VHF+UHF "VEE" Folded Dipole analyzed using 4nec2.  Optimized dimensions determined
using nikiml's Python Scripts.

Note that Forward Sweep enhances performance in the UHF Band (third harmonic of Hi-VHF),
although SWR is a bit high for lowest and highest channels.

UHF Raw Gain = 5.1 to 6.7 to 4.8 dBi,
F/B = 8.1 to 2.2 dB and SWR (300-ohms) under 4.8.
Hi-VHF Raw Gain = 1.9 dBi and F/B & F/R = 0.2 to 0.4 and SWR (300-ohms) under 2.2.
Ch2-FM Raw Gain = 0.7 to 1.6 dBi and SWR (300-ohms) 1400-52 is Excessive.
Date(s): 25 Sept 2014. Album by holl_ands. 1 - 27 of 27 Total. 8980 Visits.
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Enlarge photo 1
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Hi-VHF+UHF "VEE" Folded Dipole
3D View


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Hi-VHF+UHF "VEE" Folded Dipole
Front View
Separation between Long Elements = 2-in
[1 large square = 2.5 inches]


Enlarge photo 3
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Hi-VHF+UHF "VEE" Folded Dipole
Top View
Forward Sweep = 7.08-in
Total Width = 25.0-in
Total Length = 29.0-in = 2 x 13.75" + 1.5" Center
[1 large square = 2.5 inches]


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Hi-VHF+UHF "VEE" Folded Dipole
UHF Raw Gain = 5.1 to 6.7 to 4.8 dBi
UHF F/B = 8.1 to 2.2


Enlarge photo 5
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Hi-VHF+UHF "VEE" Folded Dipole
UHF SWR (300-ohms) under 4.8


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Hi-VHF+UHF "VEE" Folded Dipole
UHF Impedance


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 474 MHz


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 528 MHz


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 582 MHz


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 636 MHz


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 696 MHz


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 756 MHz


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 804 MHz


Enlarge Microsoft Word Document 14
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DOC14
Hi-VHF+UHF "VEE" Folded Dipole
4nec2 File


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Hi-VHF+UHF "VEE" Folded Dipole
Side View
Separation between Long Elements = 2-in
[1 large square = 2.5 inches]


Enlarge photo 16
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Hi-VHF+UHF "VEE" Folded Dipole
Hi-VHF Raw Gain = 1.9 dBi
Hi-VHF F/B & F/R = 0.2 to 0.4


Enlarge photo 17
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Hi-VHF+UHF "VEE" Folded Dipole
Hi-VHF SWR (300-ohms) under 2.2


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Hi-VHF+UHF "VEE" Folded Dipole
Hi-VHF Impedance


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 174 MHz


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 198 MHz


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 216 MHz


Enlarge photo 22
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Hi-VHF+UHF "VEE" Folded Dipole
Ch2-FM Raw Gain = 0.7 to 1.6 dBi


Enlarge photo 23
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Hi-VHF+UHF "VEE" Folded Dipole
Ch2-FM SWR (300-ohms) = 1400 to 52


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Hi-VHF+UHF "VEE" Folded Dipole
Ch2-FM Impedance


Enlarge photo 25
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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 54 MHz


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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 84 MHz


Enlarge photo 27
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Hi-VHF+UHF "VEE" Folded Dipole
Azimuthal Pattern at 108 MHz


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