Performance Data and Geometry
Pattern and VSWR
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YBN 23-5m Yagi with straight Driven Element
A short and easy to build 23 cm Yagi that provides a clean pattern and good 10 dBi of gain.
This is the scaled version of the well tested 2 m band YBN 2-5m. Design date of issue: 2020.12.29
YBN 23-5m by Maxime, F4FEY:
This Yagi was built according scaling the 2 m version YBN 2-5m by Kazuo, 7L1TIG.
See his website here . Thank you Kazuo!
YBN YBN 23-5m 3D pattern plot at 1296.2 MHz
Specs: with 4 mm elements @ 1296.2 MHz
Gain vs. isotr. Rad. 10.3 dBi Gain vs. Dipole 8.2 dBD -3 dB E-plane 53.6 deg. -3 dB H-plane 70.0 deg. F/B -23.2 dB F/R -21.6 dB Impedance 50 ohms VSWR Band Width 1.15:1 * Mechan. Length 160 mm plus 2 x 15 mm offset Electr. Length 0.69 λ Stacking Dist. h-pol. (1296.2 MHz) top-to-bottom 0.202 m or 0.66 ft side-by-side 0.256 m or 0.84 ft *) at 1300.0 MHz
How many VHF operators have been looking up this design since Dec. 2020?
This Yagi with 4 mm elements through a 7.5 x 7.5 mm plastic boom
"Ready to saw and drill" data for mounting elements through this plastic boom:
The Drivers diameter is 4 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 SWR plots - simulated
None so far.
Nothing yet ...
73, Hartmut, DG7YBN