Performance Data and Geometry
Pattern and VSWR
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GTV 23-23m Yagi with bent Driven Element
A long 23 cm Yagi that provides a very clean pattern and 18.6 dBi of gain.
This is the scaled version of the 70 cm band GTV 70-23m. Design date of issue: 2021.09.17
GTV 23-23m 3D pattern plot at 1296.2 MHz
Specs: with 3/8 inch elements @ 1296.2 MHz
Gain vs. isotr. Rad. 18.6 dBi Gain vs. Dipole 16.5 dBD -3 dB E-plane 22.8 deg. -3 dB H-plane 23.4 deg. F/B -36.7 dB F/R -30.4 dB Impedance 50 ohms VSWR Band Width 1.17:1 * Mechan. Length 1746,8 mm plus 2 x 50 mm offset Electr. Length 7.55 λ Stacking Dist. h-pol. (1296.2 MHz) top-to-bottom 0.570 m or 1.87 ft side-by-side 0.585 m or 1.92 ft *) at 1300.0 MHz
How many VHF operators have been looking up this design since Dec. 2020?
This Yagi with 3/16 inch = 4.763 mm elements
"Ready to saw and drill" data for mounting elements through this plastic boom:
The Drivers diameter is 5.0 mm.
The EZNEC model is done with Auto-Segmentation at 1296.2 MHz
Pattern and VSWR Plots
Elevation and Azimuth plot at 1296.2 MHz
Return Loss and VSWR plots - simulated
Return Loss, VSWR and Smith Chart - measured by ZS6JON
None so far.
73, Hartmut, DG7YBN