Back

KK4OBI Bent Dipoles


This is the 4NEC2 antenna model for: Standard Horizontal Folded-End Dipoles

To use this model:
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


Back