DG7YBN / 1296 MHz / GTV 23-65w
  Last Update June 6th, 2021




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Performance Data and Geometry
Pattern and VSWR
Download as File


GTV 23-65w  Yagi with bent Driven Element



A 6.0 m long 23 cm Yagi that provides a very clean pattern and 23.4 dBi of gain.
With that features she is clearly suitable for single Yagi EME even with modest output power.
The bent DE (K6STI style) transforms from approx. 17 ohms to 50 ohms at feed point.
Design date of issue: 2021.06.05




GTV 23-65w 3D pattern plot at 1296.2 MHz




Performance Data

Specs: with 3.2 mm elements @ 1296.2 MHz

Gain vs. isotr. Rad.  23.4 dBi
Gain vs. Dipole       21.1 dBD
-3 dB E-plane         13.6 deg.
-3 dB H-plane         13.6 deg.
F/B                  -39.3 dB
F/R                  -36.7 dB
Impedance               50 ohms
VSWR Band Width       1.12:1 *
Mechan. Length        5854.0 mm plus 2 x 73 mm offset
Electr. Length        25.3 λ

Stacking Dist. h-pol. (1296.2 MHz)
top-to-bottom         0.98 m or 3.20 ft
side-by-side          0.98 m or 3.20 ft

*) at 1300.0 MHz


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Geometry



This Yagi with 3.2 mm elements

Ele. 3.2 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:


Coming soon ...


The Drivers diameter is 4 mm.
The EZNEC model is done with Auto-Segmentation at 1296.2 MHz




This Yagi with 3/16 inch = 4.763 mm elements

Boom shape: square
Boom dim: 5/8 x 5/8 inch
Wall thickn.: 1.6 mm
Holes in boom: 7.5 mm
Offset rear: 70 mm
Offset front: 70 mm
 



"Ready to saw and drill" data for mounting elements through this plastic boom:






The Drivers diameter is 4.763 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

 


Average Gain corrected Forward Gain is 23.43 dBi or 21.28 dBd.

Return Loss and SWR plots - simulated




Average Gain Correction and G/Ta (T_earth = 320 K, T_sky = 7 K assumed)










Downloads

None so far.








73, Hartmut, DG7YBN



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