My office is located in a metal warehouse type structure which
effectively shields us from most outside signals. If I want to listen
to the radio or use my cell phone inside the building I have to open a
bay door. Is there a way I can get all those radio waves inside the
building without opening the doors. Is it possible to place an
antenna outside and have everything rebroadcast inside? The main
reason for this approach is the cell phone. It would be kind of
impractical to run an antenna from my cell phone to the outdoors.

Barring the rebroadcasting idea, I am still interested in what the
best way is to get better reception on the radio. Do I need to run a
wire outside or somehow ground the radio. Go easy on me, I've heard
some stuff about 7mhz being 23 feet long at a quarter wave. If your
gonna spring some of that stuff on me I need a little more detailed
information. I'm not up on radio lingo but I am technically capable.

While it may not work for you , look up "passive repeater" This is an
antenna aimed at the desired station (on the outside of the building in your
case) and a feedline inside the building hooked to another antenna.

For receiving other frequencies you may have to run a wire outside the
building and either hook it to the receiver or wrap it around the receiver.

I have not seen it but have heard that in long tunnels they have an outside
antenna and an amplifier and some inside antennas for the FM radio stations.