GTV 12m-3m

Performance Data and Geometry

Pattern and VSWR

With Ground Gain

Stacking

GTV 12m-3m with straight split Dipole

24.89 to 24.99 MHz WARC band bent dipole Yagi. The bent DE (K6STI style) transforms to 50 ohms at feed point for direct feed. Design date of issue: 2022.05.05

GTV 12m-3m
Current distribution

Performance Data (24.95 MHz)


Gain vs. isotr. Rad.   7.3 dBi
Gain vs. Dipole        5.1 dBD
-3 dB E-plane         67.8 deg.
-3 dB H-plane        118.6 deg.
F/B                  -24.4 dB
F/R                   -8.2 dB
Impedance               50 ohms
Mechan. Length        3630 mm plus offsets
Electr. Length        0.30 λ

Geometry

For building on a 35-50 mm boom, 20 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 24.95 MHz

SWR and Return Loss plots - simulated with 4nec2

Radiation pattern with Ground Gain

At 12 m above perfect ground

At 12 m above perfect ground


Gain vs. isotr. Rad.  13.2 dBi  at  15 deg.
Gain vs. Dipole       11.0 dBD
F/B                  -32.1 dB   at 168 deg.

Stacking

73, Hartmut, DG7YBN