wheeler.nec

zip contains tool for Antenna Modelling with examples

CM Wheeler Coil, by K6STI
CE
SY D = #14/in
GW	1	1	0.609	0.000	0.000	0.582	0.179	0.013	D
GW	2	1	0.582	0.179	0.013	0.503	0.343	0.026	D
GW	3	1	0.503	0.343	0.026	0.380	0.476	0.038	D
GW	4	1	0.380	0.476	0.038	0.222	0.567	0.051	D
GW	5	1	0.222	0.567	0.051	0.045	0.607	0.064	D
GW	6	1	0.045	0.607	0.064	-0.135	0.594	0.077	D
GW	7	1	-0.135	0.594	0.077	-0.304	0.527	0.089	D
GW	8	1	-0.304	0.527	0.089	-0.446	0.414	0.102	D
GW	9	1	-0.446	0.414	0.102	-0.548	0.264	0.115	D
GW	10	1	-0.548	0.264	0.115	-0.602	0.091	0.128	D
GW	11	1	-0.602	0.091	0.128	-0.602	-0.091	0.140	D
GW	12	1	-0.602	-0.091	0.140	-0.548	-0.264	0.153	D
GW	13	1	-0.548	-0.264	0.153	-0.446	-0.414	0.166	D
GW	14	1	-0.446	-0.414	0.166	-0.304	-0.527	0.179	D
GW	15	1	-0.304	-0.527	0.179	-0.135	-0.594	0.191	D
GW	16	1	-0.135	-0.594	0.191	0.045	-0.607	0.204	D
GW	17	1	0.045	-0.607	0.204	0.222	-0.567	0.217	D
GW	18	1	0.222	-0.567	0.217	0.380	-0.476	0.230	D
GW	19	1	0.380	-0.476	0.230	0.503	-0.343	0.242	D
GW	20	1	0.503	-0.343	0.242	0.582	-0.179	0.255	D
GW	21	1	0.582	-0.179	0.255	0.609	0.000	0.268	D
GW	22	1	0.609	0.000	0.268	0.582	0.179	0.281	D
GW	23	1	0.582	0.179	0.281	0.503	0.343	0.293	D
GW	24	1	0.503	0.343	0.293	0.380	0.476	0.306	D
GW	25	1	0.380	0.476	0.306	0.222	0.567	0.319	D
GW	26	1	0.222	0.567	0.319	0.045	0.607	0.332	D
GW	27	1	0.045	0.607	0.332	-0.135	0.594	0.344	D
GW	28	1	-0.135	0.594	0.344	-0.304	0.527	0.357	D
GW	29	1	-0.304	0.527	0.357	-0.446	0.414	0.370	D
GW	30	1	-0.446	0.414	0.370	-0.548	0.264	0.383	D
GW	31	1	-0.548	0.264	0.383	-0.602	0.091	0.395	D
GW	32	1	-0.602	0.091	0.395	-0.602	-0.091	0.408	D
GW	33	1	-0.602	-0.091	0.408	-0.548	-0.264	0.421	D
GW	34	1	-0.548	-0.264	0.421	-0.446	-0.414	0.434	D
GW	35	1	-0.446	-0.414	0.434	-0.304	-0.527	0.446	D
GW	36	1	-0.304	-0.527	0.446	-0.135	-0.594	0.459	D
GW	37	1	-0.135	-0.594	0.459	0.045	-0.607	0.472	D
GW	38	1	0.045	-0.607	0.472	0.222	-0.567	0.485	D
GW	39	1	0.222	-0.567	0.485	0.380	-0.476	0.497	D
GW	40	1	0.380	-0.476	0.497	0.503	-0.343	0.510	D
GW	41	1	0.503	-0.343	0.510	0.582	-0.179	0.523	D
GW	42	1	0.582	-0.179	0.523	0.609	0.000	0.536	D
GW	43	1	0.609	0.000	0.536	0.582	0.179	0.548	D
GW	44	1	0.582	0.179	0.548	0.503	0.343	0.561	D
GW	45	1	0.503	0.343	0.561	0.380	0.476	0.574	D
GW	46	1	0.380	0.476	0.574	0.222	0.567	0.587	D
GW	47	1	0.222	0.567	0.587	0.045	0.607	0.599	D
GW	48	1	0.045	0.607	0.599	-0.135	0.594	0.612	D
GW	49	1	-0.135	0.594	0.612	-0.304	0.527	0.625	D
GW	50	1	-0.304	0.527	0.625	-0.446	0.414	0.638	D
GW	51	1	-0.446	0.414	0.638	-0.548	0.264	0.650	D
GW	52	1	-0.548	0.264	0.650	-0.602	0.091	0.663	D
GW	53	1	-0.602	0.091	0.663	-0.602	-0.091	0.676	D
GW	54	1	-0.602	-0.091	0.676	-0.548	-0.264	0.689	D
GW	55	1	-0.548	-0.264	0.689	-0.446	-0.414	0.701	D
GW	56	1	-0.446	-0.414	0.701	-0.304	-0.527	0.714	D
GW	57	1	-0.304	-0.527	0.714	-0.135	-0.594	0.727	D
GW	58	1	-0.135	-0.594	0.727	0.045	-0.607	0.740	D
GW	59	1	0.045	-0.607	0.740	0.222	-0.567	0.752	D
GW	60	1	0.222	-0.567	0.752	0.380	-0.476	0.765	D
GW	61	1	0.380	-0.476	0.765	0.503	-0.343	0.778	D
GW	62	1	0.503	-0.343	0.778	0.582	-0.179	0.791	D
GW	63	1	0.582	-0.179	0.791	0.609	0.000	0.803	D
GW	64	1	0.609	0.000	0.803	0.582	0.179	0.816	D
GW	65	1	0.582	0.179	0.816	0.503	0.343	0.829	D
GW	66	1	0.503	0.343	0.829	0.380	0.476	0.842	D
GW	67	1	0.380	0.476	0.842	0.222	0.567	0.854	D
GW	68	1	0.222	0.567	0.854	0.045	0.607	0.867	D
GW	69	1	0.045	0.607	0.867	-0.135	0.594	0.880	D
GW	70	1	-0.135	0.594	0.880	-0.304	0.527	0.893	D
GW	71	1	-0.304	0.527	0.893	-0.446	0.414	0.905	D
GW	72	1	-0.446	0.414	0.905	-0.548	0.264	0.918	D
GW	73	1	-0.548	0.264	0.918	-0.602	0.091	0.931	D
GW	74	1	-0.602	0.091	0.931	-0.602	-0.091	0.944	D
GW	75	1	-0.602	-0.091	0.944	-0.548	-0.264	0.956	D
GW	76	1	-0.548	-0.264	0.956	-0.446	-0.414	0.969	D
GW	77	1	-0.446	-0.414	0.969	-0.304	-0.527	0.982	D
GW	78	1	-0.304	-0.527	0.982	-0.135	-0.594	0.995	D
GW	79	1	-0.135	-0.594	0.995	0.045	-0.607	1.007	D
GW	80	1	0.045	-0.607	1.007	0.222	-0.567	1.020	D
GW	81	1	0.222	-0.567	1.020	0.380	-0.476	1.033	D
GW	82	1	0.380	-0.476	1.033	0.503	-0.343	1.046	D
GW	83	1	0.503	-0.343	1.046	0.582	-0.179	1.058	D
GW	84	1	0.582	-0.179	1.058	0.609	0.000	1.071	D
GS	0	0	in
GE	0
EX	0	42	1	00	1.0	0.0
'
GN	-1
FR	0	1	0	0	 333.2
EN
'this narrowband, normal-mode helical antenna yields omnidirectional circular
'polarization.  The condition for circularity is s = c^2/2, where s is the
'turn-to-turn spacing and c is the circumference, both in wavelengths.
'
'For more information, see H.A. Wheeler, "A Helical Antenna for Circular
'Polarization," Proc. IRE, vol. 35, pp 1484-1488, Dec. 1947.