How to get the signal from an external antenna placed in a tower down to the ground?

I may have access to a very high tower here at our research station in Cotonou to place an antenna and receiver. I have read something on the receivers/antenna's that are placed high in communication/telephone towers and that give an excellent coverage. Can't find the article back though.

Suppose I could place an antenna in a tower, then how to get the signal down to the receiver? I assume the Radarcape receiver is not placed next to the antenna? Doees it need additional equipment?

thanks for your time!