hrs_441.nec

zip contains tool for Antenna Modelling with examples

CM HRS 4/4/1.0 curtain array used by Nozema at Zeewolde
CM for broadcasting of Radio Netherlands (RNW).
CM TL lengths set for 30 degree slew angle.
CM GX card used to improve calculation time.
CM Arie.
CE
'
'SY Freq=15, WL=299.8/Freq
SY Freq=7.1, WL=299.8/Freq

SY Rows=4, Cols=4				' HRS 4/4/1.0
SY Dlen=WL/2					' Dipole length
SY Hdlt=WL/2					' Vertical distance between dipoles
SY Dofs=0.5					' Horizontal space between nearby dipole ends
SY Hmin=WL					' Lower dipole height
'
'GW	101	11	0		0	0	Dlen	0	0	0.2	' Single wire Dipole

SY a=dlen/40, b=dlen/2
GW	101	1	b-a/2	0	0	b+a/2	0	0	1e-3		' Cage dipole, EX segm
'
GW	102	5	0	0	a	b-2*a	0	a	1e-3		' left half
GW	103	1	b-2*a	0	a	b-a/2	0	0	1e-3		' down segm to EX
GW	104	1	b+a/2	0	0	b+2*a	0	a	1e-3		' up segm from EX
GW	105	5	b+2*a	0	a	2*b	0	a	1e-3		' right half

GM	104	5	60	0	0	0	0	0	102		' Create 6 wire cage
'
GM	0	0	0	0	0	dofs	0	Hmin	0		' Move 'dofs' to the right

GM	50	Rows-1	0	0	0	0	0	Hdlt	0					' Create 4 rows
GM	200	Cols/2-1	0	0	0	Dlen+3*Dofs	0	0	0	' Cols/2	' Create half the cols
'
SY Rcnt = 40						' Nr of Reflector wires
SY Rdst = -WL/4						' Distance from dipoles
sy Rwdx=0.137*WL, Rhgx=WL/5				' eXtra width and height for reflector

SY Rwdt=Cols/2*Dlen+(Cols-1)*Dofs+Rwdx			' Get total reflector width
SY Rmin=Hmin-Rhgx, Rmax=Hmin+(Rows-1)*Hdlt+Rhgx		' Get reflector min and max height
SY Rdlt=(Rmax-Rmin)/(Rcnt-1)				' Distance between reflector wires

GW	1000	15	0	Rdst	Rmin	Rwdt	Rdst	Rmin	.005		' One Reflector wire
GM	1	Rcnt-1	0	0	0	0	0	Rdlt	1000		' Create 'Rcnt' wires

GW	3	1	b+dofs-a/2 	0.0	5+a/2	b+dofs+a/2	0.0	5-a/2	0.001	' first TL segments
GW	4	1	3*(b+dofs)+a/2	0.0	5+a/2	3*(b+dofs+a/2)	0.0	5-a/2	0.001	' second TL segment
GW	5	1	0.0		0.0	5+a/2	2*a/2		0.0	5-a/2	0.001	' EX segment

CM Length L in mtr. = 52				' Towers, just for fun.
CM Radius R1 in cm. = 200, R2 in cm. = 100		' Created with build.exe
CM Start angle A1 = 0, Stop angle A2 = 360
CM Straight sections = 3, Circular sections = 4, Radial sections = 1

SY rt = 0.1		' Radius towerlegs
SY S = 15/freq		' Tower Scaling (original was created for 15 Mhz HRS441)
CE
GW	2500	9	2*S	0*S	3*S	1.66*S	0*S	20.33*S	rt
GW	2501	9	1.66*S	0*S	20.33*S	1.33*S	0*S	37.66*S	rt
GW	2502	9	1.33*S	0*S	37.66*S	1*S	0*S	55*S	rt
GW	2503	9	0*S	2*S	3*S	0*S	1.66*S	20.33*S	rt
GW	2504	9	0*S	1.66*S	20.33*S	0*S	1.33*S	37.66*S	rt
GW	2505	9	0*S	1.33*S	37.66*S	0*S	1*S	55*S	rt
GW	2506	9	-2*S	0*S	3*S	-1.66*S	0*S	20.33*S	rt
GW	2507	9	-1.66*S	0*S	20.33*S	-1.33*S	0*S	37.66*S	rt
GW	2508	9	-1.33*S	0*S	37.66*S	-1*S	0*S	55*S	rt
GW	2509	9	0*S	-2*S	3*S	0*S	-1.66*S	20.33*S	rt
GW	2510	9	0*S	-1.66*S	20.33*S	0*S	-1.33*S	37.66*S	rt
GW	2511	9	0*S	-1.33*S	37.66*S	0*S	-1*S	55*S	rt
GW	2512	3	2*S	0*S	3*S	0*S	2*S	3*S	rt
GW	2513	3	0*S	2*S	3*S	-2*S	0*S	3*S	rt
GW	2514	3	-2*S	0*S	3*S	0*S	-2*S	3*S	rt
GW	2515	3	0*S	-2*S	3*S	2*S	0*S	3*S	rt
GW	2516	3	1.66*S	0*S	20.33*S	0*S	1.66*S	20.33*S	rt
GW	2517	3	0*S	1.66*S	20.33*S	-1.66*S	0*S	20.33*S	rt
GW	2518	3	-1.66*S	0*S	20.33*S	0*S	-1.66*S	20.33*S	rt
GW	2519	3	0*S	-1.66*S	20.33*S	1.66*S	0*S	20.33*S	rt
GW	2520	3	1.33*S	0*S	37.66*S	0*S	1.33*S	37.66*S	rt
GW	2521	3	0*S	1.33*S	37.66*S	-1.33*S	0*S	37.66*S	rt
GW	2522	3	-1.33*S	0*S	37.66*S	0*S	-1.33*S	37.66*S	rt
GW	2523	3	0*S	-1.33*S	37.66*S	1.33*S	0*S	37.66*S	rt
GW	2524	1	1*S	0*S	55*S	0*S	1*S	55*S	rt
GW	2525	1	0*S	1*S	55*S	-1*S	0*S	55*S	rt
GW	2526	1	-1*S	0*S	55*S	0*S	-1*S	55*S	rt
GW	2527	1	0*S	-1*S	55*S	1*S	0*S	55*S	rt
GW	2528	2	2*S	0*S	3*S	2*S	0*S	0*S	rt
GW	2539	2	0*S	2*S	3*S	0*S	2*S	0*S	rt
GW	2530	2	-2*S	0*S	3*S	-2*S	0*S	0*S	rt
GW	2531	2	0*S	-2*S	3*S	0*S	-2*S	0*S	rt

GM 0 0 0 0 0 1.15*Rwdt Rdst/2 0 2500	' Shift tower to the left

GX	500	100					' Mirror the whole in YZ plane.
'GS	0	0	2
GE	1
LD	5	0	0	0	5.8e7		' All copper.

EK

'SY sg=6	' For single wire dipoles
SY sg=1		' For cage dipoles
TL	451	sg	401	sg	-50	WL/2
TL	351	sg	301	sg	-50	WL/2
TL	251	sg	201	sg	-50	WL/2
TL	151	sg	101	sg	-50	WL/2
TL	401	sg	351	sg	-50	WL/2
TL	201	sg	151	sg	-50	WL/2

TL	951	sg	901	sg	-50	WL/2
TL	851	sg	801	sg	-50	WL/2
TL	751	sg	701	sg	-50	WL/2
TL	651	sg	601	sg	-50	WL/2
TL	901	sg	851	sg	-50	WL/2
TL	701	sg	651	sg	-50	WL/2

TL	801	sg	504	1	50	WL/2
TL	601	sg	503	1	50	WL/2
TL	301	sg	4	1	50	WL/2
TL	101	sg	3	1	50	WL/2


SY dl1 = 295.7	'252.9 		' Length in degrees
TL	4	1	3	1	-50	dl1*WL/360
SY dl2 = 231.4	'184.7 
TL	3	1	5	1	50	dl2*WL/360
SY dl3 = 106.1	'141.8 
TL	504	1	503	1	-50	dl3*WL/360
SY dl4 = 151.7	'157.2 
TL	503	1	505	1	50	dl4*WL/360

EX	0	5	1	00	1	0
EX	0	505	1	00	-1	0

GN	2	0	0	0	13	0.005
FR	0	1	0	0	Freq

EN