DG7YBN / 10.1 MHz / YBN 30m-4m
  Last Update Apr. 29th, 2023




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Performance Data and Geometry
Pattern and VSWR
With Ground Gain
Stacking


YBN 30m-4m   with straight split Dipole

10.1 MHz WARC band Yagi.




YBN 30m-4m
Current distribution








Performance Data (10.1 MHz)

Gain vs. isotr. Rad.   8.4 dBi
Gain vs. Dipole        6.3 dBD
-3 dB E-plane         62.0 deg.
-3 dB H-plane         96.4 deg.
F/B                  -13.5 dB
F/R                  -24.2 dB
Impedance               50 ohms
Mechan. Length       12110 mm + 2 x 70 mm offset
Electr. Length        0.41 λ

Geometry

For building on a 50-70 mm boom, 30 mm mid-element tubes insulated with hydraulic clamps like from co. Stauff:




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Pattern and VSWR Plots

Elevation and Azimuth plot at 18.14 MHz

 


SWR and Return Loss plots - simulated with 4nec2










Radiation pattern with Ground Gain

At 16 m above perfect ground

At 16 m above perfect ground

Gain vs. isotr. Rad.  13.6 dBi  at  25 deg.
Gain vs. Dipole       11.4 dBD
F/B                  -18.9 dB   at 157 deg.


At 20 m above perfect ground

At 20 m above perfect ground

Gain vs. isotr. Rad.  14.0 dBi  at  21 deg.
Gain vs. Dipole       11.9 dBD
0F/B                  -19.8 dB   at 16 deg.








Stacking










73, Hartmut, DG7YBN



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