vehicle.nec

zip contains tool for Antenna Modelling with examples

CE Vehicle-Mounted Whip, by K6STI
'
SY F=16
SY M=47
SY T=68
SY B=6
SY R=9
SY S=110
SY W=120
SY L=175
SY Y=66
SY D=2
SY C=66
SY H=100
'
GW	1	1	0	0	F	B	0	F	.5
'
GW	2	1	0	Y	F	B	Y	F	.5
GW	3	4	0	0	F	0	Y	F	D
GW	4	5	0	0	F	0	0	C	.5
GW	5	2	0	0	C	0	0	H	.11
GW	6	3	B	0	F	W	0	F	D
'
GW	7	3	B	Y	F	W	Y	F	D
GW	8	1	W	0	F	L	0	F	D
GW	9	1	W	Y	F	L	Y	F	D
GW	10	1	B	0	F	B	Y	F	D
GW	11	1	W	0	F	W	Y	F	D
'
GW	12	1	L	0	F	L	Y	F	D
GW	13	1	B	0	F	B	0	M	D
GW	14	1	B	Y	F	B	Y	M	D
GW	15	1	W	0	F	W	0	M	D
GW	16	1	W	Y	F	W	Y	M	D
'
GW	17	1	L	0	F	L	0	M	D
GW	18	1	L	Y	F	L	Y	M	D
GW	19	3	B	0	M	W	0	M	D
GW	20	3	B	Y	M	W	Y	M	D
GW	21	1	W	0	M	L	0	M	D
'
GW	22	1	W	Y	M	L	Y	M	D
GW	23	1	B	0	M	B	Y	M	D
GW	24	1	W	0	M	W	Y	M	D
GW	25	1	L	0	M	L	Y	M	D
GW	26	1	B	0	M	R	0	T	D
'
GW	27	1	B	Y	M	R	Y	T	D
GW	28	1	W	0	M	S	0	T	D
GW	29	1	W	Y	M	S	Y	T	D
GW	30	3	R	0	T	S	0	T	D
GW	31	3	R	Y	T	S	Y	T	D
'
GW	32	1	R	0	T	R	Y	T	D
GW	33	1	S	0	T	S	Y	T	D
GW	34	3	B	0	F	W	0	M	D
GW	35	3	R	0	T	S	Y	T	D
GW	36	1	B	0	F	B	Y	M	D
'
GS	0	0	in
GE	1
EX	0	4	1	00	1.0	0.0
LD	1	4	1	0	0	60.7 uh	0
'
GN	2	0	0	0	13	.005
FR	0	1	0	0	 7.2
EN
'This models a loaded whip on a toyota 4-runner.  the car body is modeled with
'wires along its periphery, below the windows, along the back bumper, and on a
'few diagonals.  This still may not be enough to adequately model the surfaces
'involved.  The pattern is quite directional.  Disable x-axis pattern symmetry
'to view the asymmetric pattern.  Note that surfaces near the whip carry
'out-of-phase current that effectively cancels whip radiation.  This greatly
'lowers radiation resistance and efficiency.  It's much better to mount the whip
'higher up when mechanically feasible.  Ground losses are not modeled.  The
'capacity to ground of unmodeled vehicle surfaces is ignored.  The geometry for
'this model was developed by Dave Barton, AF6S.