"nico" wrote in message
...

Hello.. I am interested in modeling with 4nec2 a collinear antenna for
869 MHz frequencies, it's use for my security systems.
i wright this code in 4nec2 but i don't see the far field

GW 1 1 0 0.025 0.919 0 0.025 1 1.e-3
GW 2 1 0 0.025 1 0 0.035 1 1.e-3
GW 3 1 0 0.035 1 0 0.035 1.13 1.e-3
GW 4 1 0 0.035 1.13 0 0.025002 1.13009996 1.e-3
GW 5 1 0 0.025002 1.13009996 0 0.025 1.26 1.e-3
GW 7 1 0 0.035 1.26 0 0.035 1.3899 1.e-3
GW 8 1 0 0.035 1.39 0 0.025 1.39 1.e-3
GW 9 1 0 0.025 1.39 0 0.025 1.476 1.e-3
GE 0
EK
EX 0 4 1 0 1 0
GN 2 0 0 0 20 0.0303
FR 0 1 0 0 869 0


Hi Nico,

You are missing a "Tag" 6, which should connect tags 5 and 7.
On a quick check; tags: 2, 4, "6", and 8 are 10mm long. As close
as possible; all other tags should be segmented in 10mm lengths --
for example tag 1 is 81 mm long and should be segmented as:
GW 1 8 0 0.025 0.919 0 0.025 1 1.e-3.

Your "GE" card shows "no groundplane. It should be changed to:

GE 1 0 0

indicating a ground plane is specified.

If you wish to show the far field you must include and "RP" card;
for example:

RP 0 181 1 1000 -90 90 1.00000 1.00000

Which shows Theta from -90 to 90 degrees at phi = 90 degrees

You should also show an "EN" card at the end of your code to
indicate program end.

Regards,

Frank