Re: NEC-LIST: Negative resistance?

Peter Fuks <peter_at_tet.kth.se> wrote:
>The attached listing which describes a half-wave dipole with some
>supporting structure generates negative resistance. Do we have a
>solution to the energy crisis?
>
>Any comments or explanations are most welcome.
>
>CM sailing1 dipol balun Z0=136 ohm and support
>CE
>GW 1 19 0.0 0.0 0.0375 0.0 0.0 -0.0375 0.00175
>GW 2 10 0.0 0.0 0.003 0.0 -0.03 0.003 0.00175
>GW 3 10 0.0 0.0 -0.003 0.0 -0.03 -0.003 0.00175
>GW 4 5 0.0 -0.03 0.03 0.0 -0.03 -0.03 0.00175
>GE 0
>FR 0 1 0 0 2000 10.0000 0.00E+00
>EX 0 1 10 0 1.00E+00 0.00E+00
>RP 0 1 360 1001 90.00E+00 0.00E+00 0.00E+00 1.00E+00
>EN
>
>take care,
>
>Peter.

Here's what NEC-4 said when I tried to run your model:

SEGCHK: ERROR - SEGMENTS 9 AND 20 INTERSECT AT A MIDPOINT

SEGCHK: WARNING - THE CENTER OF SEGMENT 20 IS WITHIN THE VOLUME OF SEGMENT 9

SEGCHK: ERROR - SEGMENTS 11 AND 30 INTERSECT AT A MIDPOINT

SEGCHK: WARNING - THE CENTER OF SEGMENT 30 IS WITHIN THE VOLUME OF SEGMENT 11

SEGCHK: ERROR - SEGMENTS 29 AND 42 INTERSECT AT A MIDPOINT

SEGCHK: WARNING - THE CENTER OF SEGMENT 29 IS WITHIN THE VOLUME OF SEGMENT 42

SEGCHK: ERROR - SEGMENTS 39 AND 42 INTERSECT AT A MIDPOINT

SEGCHK: WARNING - THE CENTER OF SEGMENT 39 IS WITHIN THE VOLUME OF SEGMENT 42

-Chuck W1HIS
Received on Sun Feb 27 2000 - 06:30:24 EST