20m5elya.nec

zip contains tool for Antenna Modelling with examples

CM 	20m5ElYa
CM This is a high-performance, real-life 20 meter Yagi design.
CM It's from the ARRL Antenna Book, 17th Edition, p. 11-19,
CM model 520- 40.YAG. 
CM Use 'step-radius correction' to see the very good results.
CM The end "wires" of each element were adjusted to the proper lengths.
CE
sy ref=5.64832
GW	0	3	-1.8288	-1.2192	0.0	-1.8288	1.2192	0.0	0.03175
GW	0	1	-1.8288	1.2192	0.0	-1.8288	1.8288	0.0	0.0254
GW	0	1	-1.8288	1.8288	0.0	-1.8288	2.3368	0.0	0.02222
GW	0	2	-1.8288	2.3368	0.0	-1.8288	3.4036	0.0	0.01905
GW	0	1	-1.8288	3.4036	0.0	-1.8288	3.9116	0.0	0.01588
GW	0	1	-1.8288	-1.2192	0.0	-1.8288	-1.8288	0.0	0.0254
GW	0	1	-1.8288	-1.8288	0.0	-1.8288	-2.3368	0.0	0.02222
GW	0	2	-1.8288	-2.3368	0.0	-1.8288	-3.4036	0.0	0.01905
GW	0	1	-1.8288	-3.4036	0.0	-1.8288	-3.9116	0.0	0.01588
GW	0	3	-1.8288	3.9116	0.0	-1.8288	ref	0.0	0.0127
GW	0	3	-1.8288	-3.9116	0.0	-1.8288	-ref	0.0	0.0127

'sy len=5.2705	'original value
sy len=5.3476
GW	1	3	0.0	-1.2192	0.0	0.0	1.2192	0.0	0.03175
GW	0	1	0.0	1.2192	0.0	0.0	1.8288	0.0	0.0254
GW	0	1	0.0	1.8288	0.0	0.0	2.3368	0.0	0.02222
GW	0	2	0.0	2.3368	0.0	0.0	3.4036	0.0	0.01905
GW	0	1	0.0	3.4036	0.0	0.0	3.9116	0.0	0.01588
GW	0	1	0.0	-1.2192	0.0	0.0	-1.8288	0.0	0.0254
GW	0	1	0.0	-1.8288	0.0	0.0	-2.3368	0.0	0.02222
GW	0	2	0.0	-2.3368	0.0	0.0	-3.4036	0.0	0.01905
GW	0	1	0.0	-3.4036	0.0	0.0	-3.9116	0.0	0.01588
GW	0	3	0.0	3.9116	0.0	0.0	len	0.0	0.0127
GW	0	3	0.0	-3.9116	0.0	0.0	-len	0.0	0.0127

sy di1=5.2197
GW	0	3	1.8288	-1.2192	0.0	1.8288	1.2192	0.0	0.03175
GW	0	1	1.8288	1.2192	0.0	1.8288	1.8288	0.0	0.0254
GW	0	1	1.8288	1.8288	0.0	1.8288	2.3368	0.0	0.02222
GW	0	2	1.8288	2.3368	0.0	1.8288	3.4036	0.0	0.01905
GW	0	1	1.8288	3.4036	0.0	1.8288	3.9116	0.0	0.01588
GW	0	1	1.8288	-1.2192	0.0	1.8288	-1.8288	0.0	0.0254
GW	0	1	1.8288	-1.8288	0.0	1.8288	-2.3368	0.0	0.02222
GW	0	2	1.8288	-2.3368	0.0	1.8288	-3.4036	0.0	0.01905
GW	0	1	1.8288	-3.4036	0.0	1.8288	-3.9116	0.0	0.01588
GW	0	3	1.8288	3.9116	0.0	1.8288	di1	0.0	0.0127
GW	0	3	1.8288	-3.9116	0.0	1.8288	-di1	0.0	0.0127

sy di2=5.14033
GW	0	3	5.3594	-1.2192	0.0	5.3594	1.2192	0.0	0.03175
GW	0	1	5.3594	1.2192	0.0	5.3594	1.8288	0.0	0.0254
GW	0	1	5.3594	1.8288	0.0	5.3594	2.3368	0.0	0.02222
GW	0	2	5.3594	2.3368	0.0	5.3594	3.4036	0.0	0.01905
GW	0	1	5.3594	3.4036	0.0	5.3594	3.9116	0.0	0.01588
GW	0	1	5.3594	-1.2192	0.0	5.3594	-1.8288	0.0	0.0254
GW	0	1	5.3594	-1.8288	0.0	5.3594	-2.3368	0.0	0.02222
GW	0	2	5.3594	-2.3368	0.0	5.3594	-3.4036	0.0	0.01905
GW	0	1	5.3594	-3.4036	0.0	5.3594	-3.9116	0.0	0.01588
GW	0	3	5.3594	3.9116	0.0	5.3594	di2	0.0	0.0127
GW	0	3	5.3594	-3.9116	0.0	5.3594	-di2	0.0	0.0127

sy di3=4.8768
GW	0	3	10.2108	-1.2192	0.0	10.2108	1.2192	0.0	0.03175
GW	0	1	10.2108	1.2192	0.0	10.2108	1.8288	0.0	0.0254
GW	0	1	10.2108	1.8288	0.0	10.2108	2.3368	0.0	0.02222
GW	0	2	10.2108	2.3368	0.0	10.2108	3.4036	0.0	0.01905
GW	0	1	10.2108	3.4036	0.0	10.2108	3.9116	0.0	0.01588
GW	0	1	10.2108	-1.2192	0.0	10.2108	-1.8288	0.0	0.0254
GW	0	1	10.2108	-1.8288	0.0	10.2108	-2.3368	0.0	0.02222
GW	0	2	10.2108	-2.3368	0.0	10.2108	-3.4036	0.0	0.01905
GW	0	1	10.2108	-3.4036	0.0	10.2108	-3.9116	0.0	0.01588
GW	0	3	10.2108	3.9116	0.0	10.2108	di3	0.0	0.0127
GW	0	3	10.2108	-3.9116	0.0	10.2108	-di3	0.0	0.0127

GE	0
EX	6	1	2	0	1	0
GN	-1
FR	0	1	0	0	14.2	0
EN