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 holl_ands | Home > LPDA + ZigZagLPA Antennas > Hi-VHF+UHF LPDA > 
HiVHF+UHF 8-El VEE LPDA
Hi-VHF+UHF 8-El "VEE" LPDA (with Shorting Stub) analyzed using 4nec2 after Dimensions
determined using nikiml's Python Optimization Scripts.

Although there is usable Raw Gain in UHF Band, there is a "Gain Hole" and SWR is High except
for a narrow range of frequencies.

Hi-VHF Raw Gain = 7.5 to 7.1 dBi.
UHF Raw Gain = 9.6 to 5.4 (GAIN HOLE) to 11.1 to 10.3 dBi.

Hi-VHF SWR (75-ohms) Under 2.4. [BEST Characteristic Impedance]
UHF SWR (75-ohms) Under 4.4 and Under 2.7 above 630 MHz.

Hi-VHF SWR (300-ohms) = 4.2 to 2.9 to 5.5.
UHF SWR (300-ohms) Excessive, except Under 2.7 above 624 MHz.

Optimum Forward Swept ANGLE = 26.7-deg was essential to providing best UHF Band coverage.
Date(s): 30Jul2014. Album by holl_ands. 1 - 18 of 18 Total. 4440 Visits.
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Hi-VHF+UHF 8-El VEE LPDA
3D View

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Hi-VHF+UHF 8-El VEE LPDA
Top View
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Hi-VHF+UHF 8-El VEE LPDA
Side View
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Hi-VHF+UHF 8-El VEE LPDA
Hi-VHF Raw Gain = 7.5 to 7.1 dBi
UHF Raw Gain = 9.6 to 5.4 to 11.1 to 10.3 dBi

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Hi-VHF+UHF 8-El VEE LPDA
Hi-VHF SWR (75-ohms) Under 2.4
UHF SWR (75-ohms) Under 4.4
and Under 2.7 above 630 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Hi-VHF SWR (300-ohms) = 4.2 to 2.9 to 5.5
UHF SWR (300-ohms) Excessive,
except Under 2.7 above 624 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 174 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 198 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 216 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 474 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 528 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 582 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 636 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 696 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 756 MHz

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Hi-VHF+UHF 8-El VEE LPDA
Azimuthal Pattern at 804 MHz

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DOC17
Hi-VHF+UHF 8-El VEE LPDA
4nec2 File

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Hi-VHF+UHF 8-El VEE LPDA
Ch7-69 Impedance

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Very well done analytics!
 - C4Net, Wed, 28 Oct 2020 9:53PM