Performance Data and Geometry
Pattern and VSWR
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YBN 50-9m Yagi with Straight Dipole
EME + SSB modest bandwidth version ... strictly G/T breeding with a straight dipole
This Yagi is a twin to the GTV 2-9m designed for those who yield to avoid producing and trimming a bent dipole. With rearranged driver cell this Yagi's performance is only a fraction away from the GTV version by means of losing just a marginal bit on the backlobes: F/B and F/R are down by approximately 1.5 dB compared to the GTV 2-9m.
This medium length Yagi is balanced between gain and Antenna Temperature. Design date of issue: 2019.02.25
Gain vs. isotr. Rad. 14.0 dBi Gain vs. Dipole 11.8 dBD -3 dB E-plane 38.4 deg. -3 dB H-plane 42.8 deg. F/B -26.2 dB F/R -24.5 dB Impedance 50 ohms VSWR Band Width 1.12:1 * Mechan. Length 12907 mm Electr. Length 2.16 λ Stacking Dist. h-pol. top-to-bottom 8.19 m side-by-side 9.09 m *) as in VE7BQH G/T table = at 50.30 MHz
This design has been viewed how often after the first built has been published in Mar. 2019?
Pattern and VSWR Plots
Current distribution Elevation and Azimuth plot at 50.1 MHz
RL and SWR plot - simulated
Stacking Dist. DL6WU Formula H-plane 8.19 m = 26.88 ft E-plane 9.09 m = 29.82 ft
73, Hartmut, DG7YBN