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- • 70 MHz
- YBN 4m-2wA 0.9 m 70 MHz 2 ele. with split Dipole for direct 50 ohms feed to be very uncritical for home building. A wideband version with hugh bandwidth.
A project for an afternoon ...
Antenna View
- YBN 4m-5mA 3.1 m 70 MHz 5 ele. derived from the 2 m 5 ele with split Dipole to be very uncritical for home building. A wideband version with hugh bandwidth and yet high F/B.
Elevation Plot
- YBN 4m-8mA 7.2 m 70 MHz 8 ele. derived from the 2 m 5-8 concepts 8 ele. with split Dipole to be very uncritical for home building. A wideband version with hugh bandwidth and yet high F/B.
Elevation Plot
- GTV 4m-5wA very directive 3.15 m 70 MHz low Antenna Temp. version of the low impedance, yet 50 ohms direct feed 144 MHz Low Noise Yagi introduced in Dubus 1/2013. Carefully tuned for some bandwidth and most F/B.
Elevation Plot
- GTV 4m-10LTA very directive 10.5 m 70 MHz low Antenna Temp. version of the low impedance, yet 50 ohms direct feed 144 MHz Low Noise Yagi introduced in Dubus 1/2013. A lowest Antenna Temperature version.
Elevation Plot
- YBN 4m-2w
- • 144 MHz
- • 432 MHz
Performance Data and Geometry attern and VSWR Download as FileYBN 4m-8m Yagi with straight split dipole
This full size 4 m Yagi has a high F/B and altogether very little back lobe volume
The design is a blueprint of the 5 -8 concept 8 ele. 144 MHz Yagi design with 50 ohms at feed point for direct feed.
With no high segmentation correction or complex radiators involved this design is pretty much a straight forward
simple building yet performing antenna. For stacking examples, patterns and data see the website of the
YBN 2-8m see here
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Performance Data
Gain vs. isotr. Rad. 13.2 dBi Gain vs. Dipole 11.0 dBD -3 dB E-plane 47.0 deg. -3 dB H-plane 54.8 deg. F/B -25.4 dB F/R -19.3 dB Impedance 50 ohms Mechan. Length 7159 mm Electr. Length 1.67 λGeometry
No SBC needed since designed with auto segmentated wires at designated frequency
=> Free Space Geometry ready to apply a BC according planned style of building
With Dipole 16 mm and Elements 12 mm
Refl DE D1 D2 D3 D4 D5 D6
Pos. 0 582 829 1691 2958 4375 5854 7159
Ele. 2118 2044 1966 1914 1892 1850 1844 1766
Diam. 12 16 12 12 12 12 12 12
With Dipole 12 mm and Elements 10 mm
Refl DE D1 D2 D3 D4 D5 D6
Pos. 0 582 829 1691 2958 4375 5854 7159
Ele. 2120 2053 1973 1944 1902 1861 1855 1772
Diam. 10 12 10 10 10 10 10 10
Pattern and VSWR Plots
Elevation and Azimuth plot at 70.15 MHz
RL and SWR plot - simulated
Downloads
EZNEC file of this Yagi (12 mm ele.)
73, Hartmut, DG7YBN