Stacking Distances...


Optimal stacking distances are dependent on carefully chosen dimensions. DL6WU's formula is a good starting point but may not always deliver optimum results. When using a box configuration of four yagis see table below for recommended distances that will deliver the best outcome for these G4CQM's Antennas yagi designs...


DesignHorizontal (mm)Vertical (mm)
WA650656367.00004650.0000
WA660826818.00005345.0000
WA450654545.00003320.0000
WA461155114.00004210.0000
WA260752105.00001681.0000
WA6XX2557.00001995.0000
WA271162429.00002105.0000
WA7XX2638.00002105.0000
WA9UX02903.00002338.0000
WA8C92777.00002215.0000
WA8XX2903.00002338.0000
WA9XX3041.00002429.0000
WA9C43041.00002582.0000
WA10XX2889.00002638.0000
WA7164641434.00001340.0000
WA7185621542.00001542.0000

DL6WU based stacking calculator

DL6WU based stacking calculator, simply enter the -3dB Beam Width (Degrees)...

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) =

Diamond or Conventional yagi four stack?

Conventional yagi four stackDiamond configuration
Conventional yagi four stackDiamond configuration

 

Conventional Total FieldDiamond Total Field
Conventional Total FieldDiamond Total Field

 

Conventional in AGTC LITEDiamond in AGTC LITE
Conventional in AGTC LITEDiamond in AGTC LITE

 

Updated 28-01-2018...

Terrestrial DXers working Tropo etc should carefully consider using Diamond configuration. Although spacing distances required are greater than Conventional, a tighter and more directional pattern could be very useful! Diamond configuration creates an apparent large forward lobe, secondary sides and rear dramatically reduced. However, when considering EME, use of Conventional offers lower temperatures up to and including 30° elevation. From then on up Diamond truly has the advantage!

Diamond configuration also reduces mutual coupling problems, yagi to yagi, because stacking distances are greater!

Symbolic Dimensions makes easy work of experimenting with stacking distances, see .nec files below...

Antenna Files

4W27116.nec
DW27116.nec

 

G4CQM's Antennas...

  • THESE YAGI ANTENNA DESIGNS ARE NOT FOR COMMERCIAL USE OF ANY KIND WITHOUT PRIOR CONSENT!
  • Private experimenters are free to use these designs for their own personal enlightenment. However, no guarantee or warranty is offered or implied.
  • MY WEBSITE DOES NOT USE COOKIES, EXTERNAL LINKS MIGHT!
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