14.2 MHz          14.3 MHz
Gain vs. isotr. Rad.  10.03 dBi		10.20 dBi
Gain vs. Dipole        7.88 dBD		 8.05 dBD
-3 dB E-plane         55.4 deg.
-3 dB H-plane         74.4 deg.
F/B                  -28.9 dB
F/R                  -19.2 dB
Impedance               50 ohms
VSWR Bandwidth        14.0 MHz = 1:1.06, 14.35 = 1:1.05
Mechan. Length        15.44 m exclusive boom offsets for elem. plates
Electr. Length        0.73 λ (14.2 MHz)

vert .Stacking Dist.
17.54 m or 57.5 ft

How many HF operators have been looking up this design since Oct. 2020?

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Geometry

... is available in request

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Pattern and VSWR Plots

Elevation and Azimuth plot at 14.3 MHz

 

RL and SWR plots - simulated

Tapered Model Azimuth plot 14.1 - 14.35 MHz

14.10 MHz    F/B = 21.7 dB    Gain =   9.86 dBi
14.20 MHz    F/B = 28.9 dB    Gain = 10.03 dBi
14.30 MHz    F/B = 28.6 dB    Gain = 10.20 dBi
14.35 MHz    F/B = 25.2 dB    Gain = 10.28 dBi

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Pattern and VSWR Plots over Ground

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• At height of 16 m (perfect gnd assumed)

Azimuth plot at 14.1 MHz

Azimuth plot at 14.3 MHz

RL and SWR plots

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• At height of 24 m (perfect gnd assumed)

Azimuth plot at 14.1 MHz

Azimuth plot at 14.3 MHz

RL and SWR plots

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Validation of Tapering

Tapered Yagi:

Setting 4nec2 for the task (Stepped radius correction)

Average Gain with zero wire losses = 1.000 = 0.00 dB

Average Gain with Aluminium T-6061 for Elements = 0.993 = -0.03 dB

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73, Hartmut, DG7YBN