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Old October 27th 05, 08:08 PM
Detlef Conradin
 
Posts: n/a
Default Problem with nec2

Hi

To get started with nec2 I tried to simulate a simple dipole.
The graphical view of the pattern looks okay, however the gain seems
to be to high. To what are the DBs refered in the output file?
Or what do I have to change to get the gain in dBi ?

Here is my input file:
-----------------------------------------
CM Test
CE
GW 1 20 0 0.005 0 0 7.5 0 0.01
GW 2 20 0 -0.005 0 0 -7.5 0 0.01
GW 3 1 0 -0.005 0 0 0.005 0 0.01
GE 0
EX 0 3 1 1 10. 0 0 0 0 0
FR 0 30 0 0 6. 1. 0 0 0 0
RP 0 37 72 1001 0. 0. 5. 5. 1000 1.
EN
-----------------------------------------

Detlef

PS:
If I calculate the gain with the formula:

4 * Pi * r^2 * |E|^2
Gain = -----------------------
P_in * 2 * 120 * Pi

by using the E-Field magnitude values from nec2's output I get also
those very high values. (?)