helix.nec

zip contains tool for Antenna Modelling with examples

CM Helical Antenna, by K6STI
CM Converted with 4nec2 on 22-apr-02
CM (model contains geometry violations...)
CE
SY D = .125 
GW	1	1	4.35	0.00	0.00	4.35	0.00	0.50	D
GW	2	3	4.35	0.00	0.50	4.14	1.35	0.67	D
GW	3	3	4.14	1.35	0.67	3.52	2.56	0.83	D
GW	4	3	3.52	2.56	0.83	2.56	3.52	1.00	D
GW	5	3	2.56	3.52	1.00	1.35	4.14	1.17	D
GW	6	3	1.35	4.14	1.17	-0.00	4.35	1.33	D
GW	7	3	-0.00	4.35	1.33	-1.35	4.14	1.50	D
GW	8	3	-1.35	4.14	1.50	-2.56	3.52	1.67	D
GW	9	3	-2.56	3.52	1.67	-3.52	2.56	1.83	D
GW	10	3	-3.52	2.56	1.83	-4.14	1.35	2.00	D
GW	11	3	-4.14	1.35	2.00	-4.35	-0.00	2.17	D
GW	12	3	-4.35	-0.00	2.17	-4.14	-1.35	2.33	D
GW	13	3	-4.14	-1.35	2.33	-3.52	-2.56	2.50	D
GW	14	3	-3.52	-2.56	2.50	-2.56	-3.52	2.67	D
GW	15	3	-2.56	-3.52	2.67	-1.35	-4.14	2.83	D
GW	16	3	-1.35	-4.14	2.83	0.00	-4.35	3.00	D
GW	17	3	0.00	-4.35	3.00	1.35	-4.14	3.17	D
GW	18	3	1.35	-4.14	3.17	2.56	-3.52	3.33	D
GW	19	3	2.56	-3.52	3.33	3.52	-2.56	3.50	D
GW	20	3	3.52	-2.56	3.50	4.14	-1.35	3.67	D
GW	21	3	4.14	-1.35	3.67	4.35	0.00	3.83	D
GW	22	3	4.35	0.00	3.83	4.14	1.35	4.00	D
GW	23	3	4.14	1.35	4.00	3.52	2.56	4.16	D
GW	24	3	3.52	2.56	4.16	2.56	3.52	4.33	D
GW	25	3	2.56	3.52	4.33	1.35	4.14	4.50	D
GW	26	3	1.35	4.14	4.50	-0.00	4.35	4.66	D
GW	27	3	-0.00	4.35	4.66	-1.35	4.14	4.83	D
GW	28	3	-1.35	4.14	4.83	-2.56	3.52	5.00	D
GW	29	3	-2.56	3.52	5.00	-3.52	2.56	5.16	D
GW	30	3	-3.52	2.56	5.16	-4.14	1.35	5.33	D
GW	31	3	-4.14	1.35	5.33	-4.35	-0.00	5.50	D
GW	32	3	-4.35	-0.00	5.50	-4.14	-1.35	5.66	D
GW	33	3	-4.14	-1.35	5.66	-3.52	-2.56	5.83	D
GW	34	3	-3.52	-2.56	5.83	-2.56	-3.52	6.00	D
GW	35	3	-2.56	-3.52	6.00	-1.35	-4.14	6.16	D
GW	36	3	-1.35	-4.14	6.16	0.00	-4.35	6.33	D
GW	37	3	0.00	-4.35	6.33	1.35	-4.14	6.50	D
GW	38	3	1.35	-4.14	6.50	2.56	-3.52	6.66	D
GW	39	3	2.56	-3.52	6.66	3.52	-2.56	6.83	D
GW	40	3	3.52	-2.56	6.83	4.14	-1.35	7.00	D
GW	41	3	4.14	-1.35	7.00	4.35	0.00	7.16	D
GW	42	3	4.35	0.00	7.16	4.14	1.35	7.33	D
GW	43	3	4.14	1.35	7.33	3.52	2.56	7.50	D
GW	44	3	3.52	2.56	7.50	2.56	3.52	7.66	D
GW	45	3	2.56	3.52	7.66	1.35	4.14	7.83	D
GW	46	3	1.35	4.14	7.83	-0.00	4.35	8.00	D
GW	47	3	-0.00	4.35	8.00	-1.35	4.14	8.16	D
GW	48	3	-1.35	4.14	8.16	-2.56	3.52	8.33	D
GW	49	3	-2.56	3.52	8.33	-3.52	2.56	8.50	D
GW	50	3	-3.52	2.56	8.50	-4.14	1.35	8.66	D
GW	51	3	-4.14	1.35	8.66	-4.35	-0.00	8.83	D
GW	52	3	-4.35	-0.00	8.83	-4.14	-1.35	9.00	D
GW	53	3	-4.14	-1.35	9.00	-3.52	-2.56	9.16	D
GW	54	3	-3.52	-2.56	9.16	-2.56	-3.52	9.33	D
GW	55	3	-2.56	-3.52	9.33	-1.35	-4.14	9.50	D
GW	56	3	-1.35	-4.14	9.50	0.00	-4.35	9.66	D
GW	57	3	0.00	-4.35	9.66	1.35	-4.14	9.83	D
GW	58	3	1.35	-4.14	9.83	2.56	-3.52	10.00	D
GW	59	3	2.56	-3.52	10.00	3.52	-2.56	10.16	D
GW	60	3	3.52	-2.56	10.16	4.14	-1.35	10.33	D
GW	61	3	4.14	-1.35	10.33	4.35	0.00	10.49	D
GW	62	3	4.35	0.00	10.49	4.14	1.35	10.66	D
GW	63	3	4.14	1.35	10.66	3.52	2.56	10.83	D
GW	64	3	3.52	2.56	10.83	2.56	3.52	10.99	D
GW	65	3	2.56	3.52	10.99	1.35	4.14	11.16	D
GW	66	3	1.35	4.14	11.16	-0.00	4.35	11.33	D
GW	67	3	-0.00	4.35	11.33	-1.35	4.14	11.49	D
GW	68	3	-1.35	4.14	11.49	-2.56	3.52	11.66	D
GW	69	3	-2.56	3.52	11.66	-3.52	2.56	11.83	D
GW	70	3	-3.52	2.56	11.83	-4.14	1.35	11.99	D
GW	71	3	-4.14	1.35	11.99	-4.35	-0.00	12.16	D
GW	72	3	-4.35	-0.00	12.16	-4.14	-1.35	12.33	D
GW	73	3	-4.14	-1.35	12.33	-3.52	-2.56	12.49	D
GW	74	3	-3.52	-2.56	12.49	-2.56	-3.52	12.66	D
GW	75	3	-2.56	-3.52	12.66	-1.35	-4.14	12.83	D
GW	76	3	-1.35	-4.14	12.83	0.00	-4.35	12.99	D
GW	77	3	0.00	-4.35	12.99	1.35	-4.14	13.16	D
GW	78	3	1.35	-4.14	13.16	2.56	-3.52	13.33	D
GW	79	3	2.56	-3.52	13.33	3.52	-2.56	13.49	D
GW	80	3	3.52	-2.56	13.49	4.14	-1.35	13.66	D
GW	81	3	4.14	-1.35	13.66	4.35	0.00	13.83	D
GW	82	3	4.35	0.00	13.83	4.14	1.35	13.99	D
GW	83	3	4.14	1.35	13.99	3.52	2.56	14.16	D
GW	84	3	3.52	2.56	14.16	2.56	3.52	14.33	D
GW	85	3	2.56	3.52	14.33	1.35	4.14	14.49	D
GW	86	3	1.35	4.14	14.49	-0.00	4.35	14.66	D
GW	87	3	-0.00	4.35	14.66	-1.35	4.14	14.83	D
GW	88	3	-1.35	4.14	14.83	-2.56	3.52	14.99	D
GW	89	3	-2.56	3.52	14.99	-3.52	2.56	15.16	D
GW	90	3	-3.52	2.56	15.16	-4.14	1.35	15.33	D
GW	91	3	-4.14	1.35	15.33	-4.35	-0.00	15.49	D
GW	92	3	-4.35	-0.00	15.49	-4.14	-1.35	15.66	D
GW	93	3	-4.14	-1.35	15.66	-3.52	-2.56	15.83	D
GW	94	3	-3.52	-2.56	15.83	-2.56	-3.52	15.99	D
GW	95	3	-2.56	-3.52	15.99	-1.35	-4.14	16.16	D
GW	96	3	-1.35	-4.14	16.16	0.00	-4.35	16.33	D
GW	97	3	0.00	-4.35	16.33	1.35	-4.14	16.49	D
GW	98	3	1.35	-4.14	16.49	2.56	-3.52	16.66	D
GW	99	3	2.56	-3.52	16.66	3.52	-2.56	16.82	D
GW	100	3	3.52	-2.56	16.82	4.14	-1.35	16.99	D
GW	101	3	4.14	-1.35	16.99	4.35	0.00	17.16	D
GW	102	3	4.35	0.00	17.16	4.14	1.35	17.32	D
GW	103	3	4.14	1.35	17.32	3.52	2.56	17.49	D
GW	104	3	3.52	2.56	17.49	2.56	3.52	17.66	D
GW	105	3	2.56	3.52	17.66	1.35	4.14	17.82	D
GW	106	3	1.35	4.14	17.82	-0.00	4.35	17.99	D
GW	107	3	-0.00	4.35	17.99	-1.35	4.14	18.16	D
GW	108	3	-1.35	4.14	18.16	-2.56	3.52	18.32	D
GW	109	3	-2.56	3.52	18.32	-3.52	2.56	18.49	D
GW	110	3	-3.52	2.56	18.49	-4.14	1.35	18.66	D
GW	111	3	-4.14	1.35	18.66	-4.35	-0.00	18.82	D
GW	112	3	-4.35	-0.00	18.82	-4.14	-1.35	18.99	D
GW	113	3	-4.14	-1.35	18.99	-3.52	-2.56	19.16	D
GW	114	3	-3.52	-2.56	19.16	-2.56	-3.52	19.32	D
GW	115	3	-2.56	-3.52	19.32	-1.35	-4.14	19.49	D
GW	116	3	-1.35	-4.14	19.49	0.00	-4.35	19.66	D
GW	117	3	0.00	-4.35	19.66	1.35	-4.14	19.82	D
GW	118	3	1.35	-4.14	19.82	2.56	-3.52	19.99	D
GW	119	3	2.56	-3.52	19.99	3.52	-2.56	20.16	D
GW	120	3	3.52	-2.56	20.16	4.14	-1.35	20.32	D
GW	121	3	4.14	-1.35	20.32	4.35	0.00	20.49	D
GW	122	3	4.35	0.00	20.49	4.14	1.35	20.66	D
GW	123	3	4.14	1.35	20.66	3.52	2.56	20.82	D
GW	124	3	3.52	2.56	20.82	2.56	3.52	20.99	D
GW	125	3	2.56	3.52	20.99	1.35	4.14	21.16	D
GW	126	3	1.35	4.14	21.16	-0.00	4.35	21.32	D
GW	127	3	-0.00	4.35	21.32	-1.35	4.14	21.49	D
GW	128	3	-1.35	4.14	21.49	-2.56	3.52	21.66	D
GW	129	3	-2.56	3.52	21.66	-3.52	2.56	21.82	D
GW	130	3	-3.52	2.56	21.82	-4.14	1.35	21.99	D
GW	131	3	-4.14	1.35	21.99	-4.35	-0.00	22.16	D
GW	132	3	-4.35	-0.00	22.16	-4.14	-1.35	22.32	D
GW	133	3	-4.14	-1.35	22.32	-3.52	-2.56	22.49	D
GW	134	3	-3.52	-2.56	22.49	-2.56	-3.52	22.66	D
GW	135	3	-2.56	-3.52	22.66	-1.35	-4.14	22.82	D
GW	136	3	-1.35	-4.14	22.82	0.00	-4.35	22.99	D
GW	137	3	0.00	-4.35	22.99	1.35	-4.14	23.15	D
GW	138	3	1.35	-4.14	23.15	2.56	-3.52	23.32	D
GW	139	3	2.56	-3.52	23.32	3.52	-2.56	23.49	D
GW	140	3	3.52	-2.56	23.49	4.14	-1.35	23.65	D
GW	141	3	4.14	-1.35	23.65	4.35	0.00	23.82	D
GW	142	3	4.35	0.00	23.82	4.14	1.35	23.99	D
GW	143	3	4.14	1.35	23.99	3.52	2.56	24.15	D
GW	144	3	3.52	2.56	24.15	2.56	3.52	24.32	D
GW	145	3	2.56	3.52	24.32	1.35	4.14	24.49	D
GW	146	3	1.35	4.14	24.49	-0.00	4.35	24.65	D
GW	147	3	-0.00	4.35	24.65	-1.35	4.14	24.82	D
GW	148	3	-1.35	4.14	24.82	-2.56	3.52	24.99	D
GW	149	3	-2.56	3.52	24.99	-3.52	2.56	25.15	D
GW	150	3	-3.52	2.56	25.15	-4.14	1.35	25.32	D
GW	151	3	-4.14	1.35	25.32	-4.35	-0.00	25.49	D
GW	152	3	-4.35	-0.00	25.49	-4.14	-1.35	25.65	D
GW	153	3	-4.14	-1.35	25.65	-3.52	-2.56	25.82	D
GW	154	3	-3.52	-2.56	25.82	-2.56	-3.52	25.99	D
GW	155	3	-2.56	-3.52	25.99	-1.35	-4.14	26.15	D
GW	156	3	-1.35	-4.14	26.15	0.00	-4.35	26.32	D
GW	157	3	0.00	-4.35	26.32	1.35	-4.14	26.49	D
GW	158	3	1.35	-4.14	26.49	2.56	-3.52	26.65	D
GW	159	3	2.56	-3.52	26.65	3.52	-2.56	26.82	D
GW	160	3	3.52	-2.56	26.82	4.14	-1.35	26.99	D
GW	161	3	4.14	-1.35	26.99	4.35	0.00	27.15	D
GW	162	3	4.35	0.00	27.15	4.14	1.35	27.32	D
GW	163	3	4.14	1.35	27.32	3.52	2.56	27.49	D
GW	164	3	3.52	2.56	27.49	2.56	3.52	27.65	D
GW	165	3	2.56	3.52	27.65	1.35	4.14	27.82	D
GW	166	3	1.35	4.14	27.82	-0.00	4.35	27.99	D
GW	167	3	-0.00	4.35	27.99	-1.35	4.14	28.15	D
GW	168	3	-1.35	4.14	28.15	-2.56	3.52	28.32	D
GW	169	3	-2.56	3.52	28.32	-3.52	2.56	28.49	D
GW	170	3	-3.52	2.56	28.49	-4.14	1.35	28.65	D
GW	171	3	-4.14	1.35	28.65	-4.35	-0.00	28.82	D
GW	172	3	-4.35	-0.00	28.82	-4.14	-1.35	28.99	D
GW	173	3	-4.14	-1.35	28.99	-3.52	-2.56	29.15	D
GW	174	3	-3.52	-2.56	29.15	-2.56	-3.52	29.32	D
GW	175	3	-2.56	-3.52	29.32	-1.35	-4.14	29.48	D
GW	176	3	-1.35	-4.14	29.48	0.00	-4.35	29.65	D
GW	177	3	0.00	-4.35	29.65	1.35	-4.14	29.82	D
GW	178	3	1.35	-4.14	29.82	2.56	-3.52	29.98	D
GW	179	3	2.56	-3.52	29.98	3.52	-2.56	30.15	D
GW	180	3	3.52	-2.56	30.15	4.14	-1.35	30.32	D
GW	181	3	4.14	-1.35	30.32	4.35	0.00	30.48	D
GW	182	3	4.35	0.00	30.48	4.14	1.35	30.65	D
GW	183	3	4.14	1.35	30.65	3.52	2.56	30.82	D
GW	184	3	3.52	2.56	30.82	2.56	3.52	30.98	D
GW	185	3	2.56	3.52	30.98	1.35	4.14	31.15	D
GW	186	3	1.35	4.14	31.15	-0.00	4.35	31.32	D
GW	187	3	-0.00	4.35	31.32	-1.35	4.14	31.48	D
GW	188	3	-1.35	4.14	31.48	-2.56	3.52	31.65	D
GW	189	3	-2.56	3.52	31.65	-3.52	2.56	31.82	D
GW	190	3	-3.52	2.56	31.82	-4.14	1.35	31.98	D
GW	191	3	-4.14	1.35	31.98	-4.35	-0.00	32.15	D
GW	192	3	-4.35	-0.00	32.15	-4.14	-1.35	32.32	D
GW	193	3	-4.14	-1.35	32.32	-3.52	-2.56	32.48	D
GW	194	3	-3.52	-2.56	32.48	-2.56	-3.52	32.65	D
GW	195	3	-2.56	-3.52	32.65	-1.35	-4.14	32.82	D
GW	196	3	-1.35	-4.14	32.82	0.00	-4.35	32.98	D
GW	197	3	0.00	-4.35	32.98	1.35	-4.14	33.15	D
GW	198	3	1.35	-4.14	33.15	2.56	-3.52	33.32	D
GW	199	3	2.56	-3.52	33.32	3.52	-2.56	33.48	D
GW	200	3	3.52	-2.56	33.48	4.14	-1.35	33.65	D
GW	201	3	4.14	-1.35	33.65	4.35	0.00	33.82	D
GS	0	0	in
GE	1
EX	0	1	1	00	1.0	0.0
'
GN	0	0	0	0	13	.005
FR	0	1	0	0	 435
EN
'This 10-turn, monofilar, axial-mode helix with 7-degree pitch yields right-
'circular polarization.  Each turn has 20 segments.  The pitch angle was varied
'for maximum gain.