3vertical.nec

zip contains tool for Antenna Modelling with examples

CM 3.6 MHz 1/4 WL monopole
CE
sy len=75.5, dist=68.304
GW 1 25 -dist 0 0 -dist 0 len 0.083335
GW 2 25 0 0 0 0 0 len 0.083335
GW 3 25 dist 0 0 dist 0 len 0.083335
GS 0 0 ft
GE 1
GN 1
SY I=1, Pha=90
EX 6 1 1 0 I*sin(Pha) I*cos(Pha)
SY I=2, Pha=0
EX 6 2 1 0 I*sin(Pha) I*cos(Pha)
SY I=1, Pha=-90
EX 6 3 1 0 I*sin(Pha) I*cos(Pha)
LD 5 0 0 0 3.0769E7
FR 0 1 0 0 3.6 1
EN