This is the 4NEC2 antenna bend model for: Standard Lateral Bent-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 your new model to optimize length (L=) of the 1/2 wave
dipole at various Ratios (R=) and/or angles of bend ("Ang=").
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 Lateral Bent-end
Dipole model for comparison studies
CM #14 AWG. Center-feed with Bent Ends at 1/2 wavelength over ground at
28.4 mc.
CM Variable distance of bend point from ends. Side-to-side
(lateral) bend at any angle
CM Dick Reid, KK4OBI, 2016
CM
CE
SY hgh=5.282
'150/28.4=5.282 =1/2 wl feed point
height - meters
SY L=5.3056
'Optimized length of 1/2 wave dipole
- meters
SY Segs=51
'Number of Segments in 1/2
wave
SY R=0.5
'Bend Ratio 1=no bend,
0.8=80% , 0.5=50% half-way
SY Arm=L*R
'Length of fixed horizontal central
Arm
SY SegsArm=Segs*R
'Number of Segments in central Arm
SY Bend=L*(1-R)/2
'Length of bent part of pole
SY SegsBend=Segs*(1-R)/2 'Numbers of segments in bent part
of pole
SY Ang=0
'Bend angle: 90=No
bend, 180=East, 0=West
SY X=Bend*SIN(Ang) 'X-value of
bent end
SY
Y=Bend*COS(Ang)
'Z-value of bent end
GW 1 SegsArm
-Arm/2 0 hgh
Arm/2 0 hgh
#14 'Center section
GW 2 SegsBend
-arm/2 0 hgh
-arm/2-X Y hgh
#14 'Left side bend (-Y for opposite direction
bend)
GW 3 SegsBend
Arm/2 0 hgh
Arm/2+X Y hgh
#14 'Right side bend
GE -1
GN 2 0
0 0 14 6.e-3
EK
EX 0 1
50% 0 1
0 0
FR 0 0
0 0 28.4 0
EN