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KK4OBI Bent Dipoles
This is the 4NEC2 antenna bend model for: 8 Zig-Zag Dipoles
To use this model:
- Highlight and copy (Ctrl C) the program control codes below (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 Zig-Zag antenna model.
- In Windows Explorer, right-click on your Zig-Zag model and "Rename" the file to end as ".nec".
- Open your new model to set the Height ratio (R=) and optimize the Height (z=) of the Zig-Zags
- Hand calculations required for Length of wire.
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 8 Zig-Zag horizontal center-fed dipole.
CM #14 AWG. Feedheight 1/2 wavelength over ground.
CM Length ratio is set. Zig-Zag height is optimized.
CM Hand calculation needed for wire length.
CM
CM Dick Reid, KK4OBI, 2016
CE
SY hgh=2.74
'Optimized 1/2 wavelength feed point
SY Lw=2.8847
'1/2 WL
set by: 150/mhz=meters
SY Zigs=8
'Nbr of antenna zig-zags
SY z=0.13
'Height of the Zigs
SY R=0.8
'Ratio used to set length of Zig-Zag
antenna
SY La=Lw*R
'Zig-zag antenna length tip to tip
SY base=La/Zigs
'bottom of Zig-Zag
SY s=base/2
'Step size for each zig and zag
SY Hypot=sqr(s^2+z^2)
'hand calculation of Length of Hypotenuse (side) of a Zig.
SY LenWire=hypot*(2*Zigs) 'hand calculation of Length of wire needed.
GW 1 5
0 0 hgh
s*1 0
hgh+z #14 'Right end, Up Zig
GW 2 5
s*1 0 hgh+z
s*2 0 hgh
#14 'Down Zag
GW 3 5 s*2
0 hgh s*3
0 hgh+z #14
GW 4 5 s*3
0 hgh+z
s*4 0 hgh
#14
GW 5 5
s*4 0 hgh
s*5 0
hgh+z #14
GW 6 5
s*5 0 hgh+z
s*6 0 hgh
#14
GW 7 5
s*6 0 hgh
s*7 0 hgh+z #14
GW 8 5
s*7 0 hgh+z
s*8 0 hgh
#14
GW 9 5 0
0
hgh -s*1 0
hgh+z #14 'Center and feed point
GW 10 5
-s*1 0 hgh+z
-s*2 0 hgh #14
GW 11 5
-s*2 0 hgh
-s*3 0 hgh+z #14
GW 12 5
-s*3 0 hgh+z
-s*4 0 hgh
#14
GW 13 5
-s*4 0 hgh
-s*5 0 hgh+z #14
GW 14 5
-s*5 0 hgh+z
-s*6 0 hgh #14
GW 15 5
-s*6 0 hgh
-s*7 0 hgh+z #14
GW 16 5
-s*7 0 hgh+z
-s*8 0 hgh
#14 'Left end, Down Zag
GE 1
GN 2 0 0 0 14 6.e-3
EK
EX 0 1
1 0 1
0 0
FR 0 0 0 0 52 0
EN
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