tl-test.nec

zip contains tool for Antenna Modelling with examples

CM Transmission line Test
CM spacing set to minimum seg-length for 40m
CM feedline radius optimized to get 460 ohms
CE 
SY fr = 7.05		' Frequency
SY wl = 299.8/fr	' wavelength
SY min = wl/999		' min overall seg-length
SY max = 4.95*min	' max feedline seg-length at junction
'
SY rad = .00097 	' optimized to get 460 ohms
SY dis = min		' distance between feedlines
SY len = 20		' length of feeder
SY nrs = len/max	' required nr of segments
'
GW	1	nrs	-dis/2	0	1	-dis/2	0	len+1	rad	' Left feedline
GW 	2	nrs	dis/2	0	len+1	dis/2	0	1 	rad	' Right feedline
'
GW	10	1	-dis/2	0	1	dis/2	0	1	rad	' Upper loading segment
GW	11	1	-dis/2	0	len+1	dis/2	0	len+1	rad	' Lower excitation segment
'
GE 1
'
GN 2 0 0 0 14 .006		' Sommerfeld ground
FR 0 1 0 0 fr 1
'
EX 0 10 1 0 1 0			' V source at lower segment.
'
SY r = 460
LD 0 11 1 0 r 0 0		' R ohms load at upper segment.
'