This is the 4NEC2 antenna model for: Standard Horizontal Folded-End Dipoles
To use this model:
Below. Highlight and copy (Ctrl C) the program control codes (CM,
CE, SY,etc).
Open Windows Wordpad and copy (Ctrl V) the control codes into Wordpad.
Go to "File, Save as..." and name your new antenna model.
In Windows Explorer, right-click on your new model and "Rename" the file to end as ".nec".
Open the new model to set bend point ratio (R) and BEND length to
optimize FOLD length.
4NEC2 is an NEC2, NEC4, Windows based antenna modeler and optimizer by
Arie Voors.
It is available free of charge at: www.qsl.net/4nec2/
CM Standardized model for Folded-End Dipole comparison studies.
CM #14 AWG. Velocity corrected 1/2 wavelength feedpoint over ground at
1.84 mc.
CM Variable ratio for bend point to set the horizontal dimension.
CM Variable length of bend to set the vertical dimension.
CM Length of the folded segment is found by optimization.
CM Use "Auto segmentation" option in "Settings".
CM Dick Reid, KK4OBI, 2016
CE
SY hgh=77.44
'150/1.84*VF 1/2 wave feedpoint elevation.
VF=0.95 bare wire
SY L=77.4
'150/1.84*VF 1/2 wave dipole Length - meters
SY Segs=58
'Number of segments in 1/2 wave
SY R=0.7
'Set the Arm
Bend Ratio 1=no bend, 0.7=70% , 0.5=50% half-way
SY Arm=L/2*R
'Fixed length of each horizontal Arm
SY SegsArm=Segs/2*R 'Number of segments in Arm
SY BEND=6
'Set the Length for the Bend
sections - meters
SY SegsBend=(Bend*2/L)*(Segs/2) 'Numbers of segments
in Bend
SY FOLD=8.791757 'Optimized length
of Fold section - meters
SY SegsFold=(Fold*2/L)*(Segs/2) 'Number of segments
in Fold
GW 1 SegsArm
0 0 hgh
-Arm 0 hgh
#14 'Left arm
GW 2 SegsBend
-Arm 0 hgh
-Arm 0 hgh-Bend
#14 'Left bend
GW 3 SegsFold
-Arm 0 hgh-Bend
-Arm+Fold 0
hgh-Bend #14 'Left fold
GW 4 SegsArm
0 0 hgh
Arm 0 hgh
#14 'Right arm
GW 5 SegsBend
Arm 0 hgh
Arm 0 hgh-Bend
#14 'Right bend
GW 6 SegsFold
Arm 0 hgh-Bend
Arm-Fold 0
hgh-Bend #14 'Right fold
GE 1
GN 2 0
0 0 4 0.003
EK
EX 0 1
1 0 1
0 0
FR 0 0
0 0 1.84 0
EN