Re: NEC-LIST: connecting wires to real ground in NEC2

Joe:

Jack Belrose's advice is sound. I had to use the quarter-wave wires
very close to (but not touching) ground on the first work I was
involved in on tactical antennas that had a ground involved (e.g.,
sloping Vee with terminating resistors). I later got NEC-3 and checked
a few cases and got the same result to close enough for engineering
purposes. Mary Lee, who was on my staff at the time, did a lot of
NEC-2 modeling for other structures as well, and we got good
results. We did need to "tune" the wire length of the stub to be
exactly a quarter wave and open on the far end (so a short was at the
feed).

George Hagn

"Trinkle, Joe" wrote:

> Hi,
>
> Can anyone help?
>
> I'm trying to model the current distribution over a horizontal wire
> above lossy ground. The horizontal wire needs to be terminated at
> either end by vertical risers connecting to lossy ground. Is it
> possible to model such a lossy transmission line in NEC2? Is one
> allowed to make a direct wire connection to lossy ground?
>
> Thanks
> Joe Trinkle
Received on Tue Apr 20 1999 - 19:21:58 EDT