gndscreen.nec

zip contains tool for Antenna Modelling with examples

CM 
CE
SY len=50	'Total wire length
SY hgh=20	'Tower heigth
SY segV=int(hgh)	'Vertical nr of segments
SY segH=int(len-hgh)	'Horizontal nr of segments
SY ra=360/16, radl=25	'Nr radials, radial length
SY radh = 0.0018	'radial height sabove ground
SY rseg = int(radl)	'(integer) number of segments
SY cu=5.8e7, fe=1.39e6	'Wire loading for Copper, Steel
SY wrad = 0.6e-3	'1.5 mm2 house-wiring
GW	1	segV	0	0	radh	0	0	hgh	0.6e-3
GW	2	segH	0	0	hgh	0	len-(hgh+radh)	hgh	0.6e-3
GW	11	rseg	0	0	radh	radl*cos(1*ra)	radl*sin(1*ra)	radh	wrad	'Ground screen
GW	12	rseg	0	0	radh	radl*cos(2*ra)	radl*sin(2*ra)	radh	wrad
GW	13	rseg	0	0	radh	radl*cos(3*ra)	radl*sin(3*ra)	radh	wrad
GW	14	rseg	0	0	radh	radl*cos(4*ra)	radl*sin(4*ra)	radh	wrad
GW	15	rseg	0	0	radh	radl*cos(5*ra)	radl*sin(5*ra)	radh	wrad
GW	16	rseg	0	0	radh	radl*cos(6*ra)	radl*sin(6*ra)	radh	wrad
GW	17	rseg	0	0	radh	radl*cos(7*ra)	radl*sin(7*ra)	radh	wrad
GW	18	rseg	0	0	radh	radl*cos(8*ra)	radl*sin(8*ra)	radh	wrad
GW	19	rseg	0	0	radh	radl*cos(9*ra)	radl*sin(9*ra)	radh	wrad
GW	20	rseg	0	0	radh	radl*cos(10*ra)	radl*sin(10*ra)	radh	wrad
GW	21	rseg	0	0	radh	radl*cos(11*ra)	radl*sin(11*ra)	radh	wrad
GW	22	rseg	0	0	radh	radl*cos(12*ra)	radl*sin(12*ra)	radh	wrad
GW	23	rseg	0	0	radh	radl*cos(13*ra)	radl*sin(13*ra)	radh	wrad
GW	24	rseg	0	0	radh	radl*cos(14*ra)	radl*sin(14*ra)	radh	wrad
GW	25	rseg	0	0	radh	radl*cos(15*ra)	radl*sin(15*ra)	radh	wrad
GW	26	rseg	0	0	radh	radl*cos(16*ra)	radl*sin(16*ra)	radh	wrad
GE	1
LD	5	0	0	0	cu	'Left wire
GN	2	0	0	0	14	.005
EK
EX	0	1	1	0	1	0		
FR	0	0	0	0	1.8	0
EN