DG7YBN / 144 MHz / YBN 2-6m
  Last Update Nov. 34th, 2021


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Performance Data and Geometry
Pattern and VSWR
Download as File
Stacking
6 x vertical Phased Contest Stack


YBN 2-6m  Yagi with straight Driven Element



Another variation of the well tested 5-8 series. Focussing on relatively good F/B with gain here is one more specimen that can be transformed in to respectively from any YBN 2-5m, YBN 2-5m, 2-8m or 2-10m thanks to same positions of Reflector, Dipole, D1, D2 and mostly same element lengths. Note the shape of the suitable folded dipole is same for the whole line including the FM versions. Design date of issue: 2020.11.03



4 x YBN 2-6m xpol built by Samir, 7S7V


These Yagis are built on 20 x 20 mm boom, 8 mm el. on boom held in place by 7arrays insulators.


YBN 2-6m by Samir, 7S7V


This Yagi is built on 20 x 20 mm boom, standard holders for 8 mm ele, and mastclamp from 7arrays.com, straight dipole by Antennas-Amplifiers



YBN 2-6m 3D pattern plot at 144,1 MHz




Performance Data

Specs: with 8 mm elements @ 144.3 MHz 

Gain vs. isotr. Rad.  11.1 dBi
Gain vs. Dipole        8.9 dBD
-3 dB E-plane         49.0 deg.
-3 dB H-plane         60.4 deg.
F/B                  -21.8 dB
F/R                  -13.5 dB
Impedance               50 ohms
VSWR Band Width       1.12:1 *
Mechan. Length        1880 mm plus 2 x 40 mm offset
Electr. Length        0.91 λ

Stacking Dist. h-pol. (144.3 MHz)
top-to-bottom         2.07 m or 6.8 ft
side-by-side          2.51 m or 8.2 ft

*) as in VE7BQH G/T table = at 145.00 MHz


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Geometry


This Yagi with 8 mm elements on a 20 x 20 mm boom with standard insulators

Ele. 8.0 mm
DE 10 mm
Boom 20 x 20 mm 		 



"Ready to saw and drill" data for mounting elements on boom with BC according DG7YBN for standard insulators
as sold by WiMo, Tino's Funkshop, HF-Kits NL, 7arrays:



The Drivers diameter is 10 mm for all examples.
The EZNEC model is done with Auto-Segmentation at 144 MHz



Sketch of Folded Dipole

For using this folded dipole D2 must be approx. 4 mm longer then quoted in the above table.







Pattern and VSWR Plots

Elevation and Azimuth plot at 144.3 MHz

 


Return Loss and SWR plots - simulated









Downloads

None so far.








Stacking 


Stacking Dist.    DL6WU Formula (144.3 MHz)
E-plane               2.51 m or 8.2 ft
H-plane               2.07 m or 6.8 ft



Plot and data of 2 vertically stacked YBN 2-6m using DL6WU stacking distances

Antenna View & Elevation Pattern




Plot and data of 3 vertically stacked YBN 2-6m using DL6WU stacking distances

Antenna View & Elevation Pattern




Plot and data of 4 vertically stacked YBN 2-6m using DL6WU stacking distances

Antenna View & Elevation Pattern


4 x vert. stack with lowest Yagi 4.0 m abover 'Perfect Ground'
F/B approx. -22 dB




Plot and data of 4 vertically stagger stacked YBN 2-6m using DL6WU stacking distances

4 x vert. stagger stack with lowest Yagi 6.5 m abover 'Perfect Ground'




Plot and data of 6 vertically stacked YBN 2-6m using DL6WU stacking distances

Antenna View & Elevation Pattern

6 x vert. stack with lowest Yagi 4.0 m abover 'Perfect Ground'
F/B approx. -21 dB





Plot and data of 6 vertically STAGGER stacked YBN 2-6m using DL6WU stacking distances

Lowest Yagi 4.0 m agl, highest Yagi 14.3 m agl.
23.4 dBi or > 21 dBd at close to 50 deg. HPBW in Azimuth with > -35 dB of F/B.



Antenna View & Elevation Pattern

6 x vert. stagger phased stack with lowest Yagi 4.0 m abover 'Perfect Ground'
F/B approx. -37 dB









73, Hartmut, DG7YBN



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