36ccd.nec

zip contains tool for Antenna Modelling with examples

CM CCD antenna, ant-comp. Vol-2, page 132
CM 26 sections, #14, C=503 pF
CE
'
SY len = 281.214 ft	' Original length from ant-comp-V2
'SY len = 238.74 ft	' Opt. length to resonate with original cap.
'
SY hgh=20			' Height = 20 meter
'
SY ns = 26			' Number of sections
SY n = ns/2			' sections per half-wl
SY n1 = (ns-1)/2		' sections-1 per half-wl
SY sl = len/ns			' Section length
'
GW	1	1	-n*sl	0	hgh	-n1*sl	0	hgh	#14	' Left end
GW	2	ns/2-1	-n1*sl	0	hgh	-1/2*sl	0	hgh	#14	' Left loaded wire
GW	3	1	-1/2*sl	0	hgh	1/2*sl	0	hgh	#14	' Excitation
GW	4	ns/2-1	1/2*sl	0	hgh	n1*sl	0	hgh	#14	' Right loaded wire
GW	5	1	n1*sl	0	hgh	n*sl	0	hgh	#14	' Right end
GE 0
'
'SY cap = 503 pf		' Original capacity from ant-comp-v2.
SY cap = 377.82 pf		' Opt. cap. to resonate with original length.
'
LD	0	2	0	0	0	0	cap
LD	0	4	0	0	0	0	cap
'
GN 2 0 0 0 14 0.006		' Finite ground
EX 0 3	1 0 1 0			' Voltage source on wire 2
FR 0 1 0 0 3.5			' Frequency 3.5 Kc
EN
'
' In compararison with 36dip.nec or 36inv.nec 
' this seems not worth the effort.