Re: Half Loop Mag Mobile Antenna
- Hi Andy,
--- In email@example.com, Andy <ai.egrps@...> wrote:
> Gian <i7swx@...> wrote:
> > ... i.e. what happen to RF currents un the mirror part of the loop and on
> > the car real roof.
> For a half loop that connects to the roof on both ends, at the very
> least you have the loop current itself which completes its circuit via
> the roof. There would be some spreading out of the current in the
> roof, depending on frequency, I suppose.
> Many mobile loops are complete loops that happen to rest slightly
> above the roof. That's a good question what happens in the roof in
> that case. I bet it depends a lot on loop orientation. Most of these
> small mobile loops are vertically oriented, but I have seen horizontal
> loops above the roof too. It would seem like the roof causes a
> "shorted turn" that is close coupled to the loop, which is probably
> not good.
I have a two bars roof rack across it (add-on). Would it be necessary to connect the loop mirror side to it or isolate it as strong current may spread ???