DG7YBN / 1296 MHz / YBN 23-5m
  Last Update Dec. 30th, 2020


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

Performance Data

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

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This Yagi with 4 mm elements through a 7.5 x 7.5 mm plastic boom

Ele. 4.0 mm
DE 4.0 mm
Boom 7.5 x 7.5 mm ABS Plastic

Ele. fastening &. photo acc. F4FEY

"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

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