Nec2 Short reference card

1		2	3	4	5	6	7	8	9	10	11		
GW	Wire
geom	Tag
Nr	nr of
segs	X1	Y1	Z1	X2	Y2	Z2	wire radius		
GM	Geom Move	Tag increm	new structs	Rot X (deg)	Rot X (deg)	Rot Z (deg)	Mov X	Mov Y	Mov Z	From Tag		
GR	Geom Rotate	Tag increm	total structs									
GE	no gnd	0		no ground plane present (Free Space)	
	ground
plane	1		Ground plane present, wire-ends for Z=0 are ‘connected’ to ground 
(GN card required; screen- and wire radius on GN card should be blank)	
	ground	-1		Ground present, wire-ends are not ‘connected’ to ground (GN card required) 	
EX	Voltage
Src	0	tag nr	segm nr	XX ->	real volts	imag volts	(19: 0 No act.; 1 print rel.admit. matrix asymetry)
(20: 0 No act.; 1 print imp’s for frequency loop)	
(*)	Current src	6	tag nr	segm nr	XX ->	real amps	imag amps		
									
FR	linear	0	Nr of steps	0	0	start  Mc	Step size			F1 = F0 + step	
	log	1	nr of steps	0	0	start Mc	Step size			F1 = F0 * step	
GN	free space	-1								Nullifies previous ground settings	
	finite ground	0	nr rad. wires	0	0	diel. Const	Cond. S/m	radius screen	radius wires	(In meters) See also GE card 
RP card must be set to 4	
	perfect ground	1									
	sommer
norton	2	0	0	0	diel. Const	Cond. S/m			note:  conductivity must be negative for frequency loop	
LD	nullify	-1									
	serie RLC	0	tag nr	start segm	0/end segm	R ohms	L Henry	C Farad		LD card always in series with EX and TL cards	
	parall 	1	see 0			see 0				LD4 does not supno automatic frequency scaling	
	serie RLC	2	see 0			R   oh/m	L  H/m	C  F/m		
	
	parall	3	see 0			see 2					
	impe-dance	4	see 0			Resis.
Ohms	React. Ohms	-			
	wire cond.	5	see 0			Cond. mho/m					
(*)	LC trap	6	See 0			Q-coil	L henry	C farad			
(*)	Insula-ted wire	7	See 0			Diel. const	Coat radius				
TL	trans line	tag-nr port 1	seg-nr port1	tag-nr port 2	seg-nr port 2	imped ohms	Length mtrs	admit real 1	admit ima 1	admit real 2	admit ima 2		
		a) Multiple ports are connected in parallel		b) If connected to segment with LD; LD is in serie with TL	
RP	normal	0	theta steps	phi steps	XNDA
	theta start	Phi start	Theta stsize	phi stsize	far fld dist.	norm gain F		
	add surf wave	1	see 0	XNDA:
17: 	0: major/minor axis;	1: vert/hor gain	
18: 	0: no norm gain; 	1-5: normalized gain
19: 	0: power gain; 	1: directive gain	
20: 	0: no avaraging; 	1: avar gain; 2 avar gain 	Add surface wave	
	ground cond’s	2..3	see 0		Special ground conditions	
	ground screen	4	see 0		Ground-screen; must be specified in GN card !	
	gnd scr, cond’s	5..6	see 0		Botth ground-screen and special ground conditions	
PQ	no charges	-1									
	charges	0	tag nr	start segm	0/end segm						
PT	all curr	-2									
	no curr 	-1									
	Curr.	0	tag nr	start segm	0/end segm						
	Receiv- pattern	1..3	tag nr	start segm	0/end segm					See page 74 manual 	
											
Geometry cards	I1	I2	F1	F2	F3	F4		
	3-5	6-10	11-20	21-30	31-40	41-50		
Prog-ctrl cards	I1	I2	I3	I4	F1	F2	F3	F4	F5	F6		
	3-5	6-10	11-15	16-20	21-30	31-40	41-50	51-60	61-70	71-80