magnetic.nec

zip contains tool for Antenna Modelling with examples

CM Data for main loop:
CM Length L in mtr. = 0
CM Radius R1 in cm. = 100
CM Radius R2 in cm. = 100
CM Number of turns = 1
CM Segments per turn = 18
CM Rotate X, Y, Z = 90, 0, 0
CM Move X, Y, Z = 0, 0, 0
'
CM data for feed-loop:
CM Length L in mtr. = 0
CM Radius R1 in cm. = 20
CM Radius R2 in cm. = 20
CM Number of turns = 1
CM Segments per turn = 18
CM Rotate X, Y, Z = 90, 0, 0
CM Move X, Y, Z = 0, 0, dlt
CE
'
GW    1   1      1.0       .0       .0  .939693       .0  -.34202     .001
GW    2   1  .939693       .0  -.34202  .766044       .0 -.642788     .001
GW    3   1  .766044       .0 -.642788       .5       .0 -.866025     .001
GW    4   1       .5       .0 -.866025  .173648       .0 -.984808     .001
GW    5   1  .173648       .0 -.984808 -.173648       .0 -.984808     .001
GW    6   1 -.173648       .0 -.984808      -.5       .0 -.866025     .001
GW    7   1      -.5       .0 -.866025 -.766044       .0 -.642788     .001
GW    8   1 -.766044       .0 -.642788 -.939693       .0  -.34202     .001
GW    9   1 -.939693       .0  -.34202     -1.0       .0       .0     .001
GW   10   1     -1.0       .0       .0 -.939693       .0   .34202     .001
GW   11   1 -.939693       .0   .34202 -.766044       .0  .642788     .001
GW   12   1 -.766044       .0  .642788      -.5       .0  .866025     .001
GW   13   1      -.5       .0  .866025 -.173648       .0  .984808     .001
GW   14   1 -.173648       .0  .984808  .173648       .0  .984808     .001
GW   15   1  .173648       .0  .984808       .5       .0  .866025     .001
GW   16   1       .5       .0  .866025  .766044       .0  .642788     .001
GW   17   1  .766044       .0  .642788  .939693       .0   .34202     .001
GW   18   1  .939693       .0   .34202      1.0       .0       .0     .001
'
SY dlt = -.75		' center feed loop .75 meter below center of main loop
GW   21   1       .2       .0      dlt+.0  .187939       .0 dlt-.068404     .001
GW   22   1  .187939       .0 dlt-.068404  .153209       .0 dlt-.128558     .001
GW   23   1  .153209       .0 dlt-.128558       .1       .0 dlt-.173205     .001
GW   24   1       .1       .0 dlt-.173205   .03473       .0 dlt-.196962     .001
GW   25   1   .03473       .0 dlt-.196962  -.03473       .0 dlt-.196962     .001
GW   26   1  -.03473       .0 dlt-.196962      -.1       .0 dlt-.173205     .001
GW   27   1      -.1       .0 dlt-.173205 -.153209       .0 dlt-.128558     .001
GW   28   1 -.153209       .0 dlt-.128558 -.187939       .0 dlt-.068404     .001
GW   29   1 -.187939       .0 dlt-.068404      -.2       .0      dlt+.0     .001
GW   30   1      -.2       .0      dlt+.0 -.187939       .0 dlt+.068404     .001
GW   31   1 -.187939       .0 dlt+.068404 -.153209       .0 dlt+.128558     .001
GW   32   1 -.153209       .0 dlt+.128558      -.1       .0 dlt+.173205     .001
GW   33   1      -.1       .0 dlt+.173205  -.03473       .0 dlt+.196962     .001
GW   34   1  -.03473       .0 dlt+.196962   .03473       .0 dlt+.196962     .001
GW   35   1   .03473       .0 dlt+.196962       .1       .0 dlt+.173205     .001
GW   36   1       .1       .0 dlt+.173205  .153209       .0 dlt+.128558     .001
GW   37   1  .153209       .0 dlt+.128558  .187939       .0 dlt+.068404     .001
GW   38   1  .187939       .0 dlt+.068404       .2       .0      dlt+.0     .001
GE 0
EX	0	25	1	00	1	0			' Voltage source
SY cap=57.1 pf
LD	0	5	1	1	0	0	cap		' Capacitor 200 pF
FR	0	1	1	1	7.05	0			' Frequency