Performance Data and Geometry
Pattern and VSWR
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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
How many VHF operators have been looking up this design since May 2021?
Geometry
This Yagi with 3.2 mm elements
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Ele. 3.2 mm
DE 4.0 mm
Boom 7.5 x 7.5 mm ABS Plastic
Ele. fastening &. photo acc. F4FEY
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"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
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"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