[uglybiker]

I need a AM antenna for the car and the home that will get me the stations I want with no interference.

I got the same problem. I want an antenna that, after the sun goes down, will pick up something besides Mexi-polka.

[Screaming_Gerbil]

Loop antenna design examples (linked to articles - click on the pictures):

[Bloody Sam Roberts]

I want an antenna that, after the sun goes down, will pick up something besides Mexi-polka.

That isn't a function of your antenna. It is an example of the way the Earth works.

What you are receiving is radio signals that have propgated over long distances by "skipping" between the ground and the ionosphere layer of Earth's atmosphere.

At night, it is likely that your local stations reduce their power output, thereby allowing these skip signals to become more easily received by your radio.