G4CQM VHF/UHF Yagi Antenna Designs 2018

Stacking Yagis

Conventional Yagi Four-Stack WA27116 seen in AOP...

Conventional Yagi Four-Stack WA27116 seen in AOP

K6STI's Antenna Optimizer Professional (AOP) software makes easy work of yagi stacking when using Symbolic Dimensions. See WA27116 example, opens in new window... 4W27116.ANT

With the Free Space Symmetric command only two sets of symbolic build representations are required for four yagis, one pair in mirror. Vertical and Horizontal stacking distances are easily changed making alterations and comparison very easy!

Meanwhile 4nec2 does not have the Free Space Symmetric option so some extra coding is required. However, Symbolic Dimensions can be used, so yet again altering spacing is very easy. See WS27116 example, opens in new window... 4WS27116.nec

Several designers choose to use numerical file format where errors are difficult to spot and manipulation of design parameters is awkward and time consuming. Symbolic Dimensions make life much easier and more accurate requiring only one numeric value each to describe spacing, length and diameter!

G4CQM yagi designs use DL6WU stacking distances as a starting point...

DL6WU based stacking calculator, simply enter the -3dB Beam Width (Degrees) information found on each yagi design page...

Enter Freq (MHz):

Enter -3dB Beam Width (Degrees):

E-Plane:

H-Plane:

 

Resultant Stacking Distances:

E-Plane (Metres) =

H-Plane (Metres) =

E-Plane (Feet) =

H-Plane (Feet) =


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