NEC code examples

1. Dipole
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1.1 CM dipole with feed line and real ground || start of comment
1.2 CE || end of comment
Antenna geometry description. GW --geometry wire.
2.1 wire 1 made up of 21 segments, from point (-16.85,0,70) to
(16.85,0,70). The wire located on XZ plane(Y=0) with radidus 3.367e-3
2.2 wire 2 made up of 3 segments, from point (-1,0,1) to (1,0,1) with radius 3.367e-3
2.3 all dimensions are multiplied by 0.3048(=12*25.4/1000), it indicates previous dimension are in feet.
2.4 Geometry end with 0(0=no ground plane)
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2.1 GW 1 21 -16.85 0 70 17 0 70 3.367e-3
2.2 GW 2 3 -1 0 1 1 0 1 3.367e-3
2.3 GS 0 0 0.3048 ' All in ft.
2.4 GE 0
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Transmission line connection the antenna wires.
3.1 TL connected from wire 1, segment 11, to wire 2, segment 2.
The impedance of TL line is 50Ohm.
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3.1 TL 1 11 2 2 50 0
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4.1 Wire conductivity =5.8e7
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4.1 LD 5 0 0 0 5.8e7 0
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5.1 Excitation: voltage source(0) on tagnr=2,segment=2, 0=no action,voltage (real)=1.0
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5.1 EX 0 2 2 0 1 0
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6.1 Ground parameters: 0=finite ground,0=no ground screen,0,0=blank,dielectric constant=13, conductivity of ground=0.005

6.1 GN 0 0 0 0 13 0.005
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7.1 frequency, 0=linear, nr=1(no of steps),0,0,start freq=14.15MHz,step=0
7.1 FR 0 1 0 0 14.15 0