How can you Create an Radio Wave [And therefore Other Waves?] -What can this Mean?

-Radio Waves are used to Transmit Information, from One Place to Another -What happens, is that Alternating Currents makes the Charges to Oscillate [Go Up and Down] meaning an Oscillating Electric and Magnetic Filed appear, which is an Electric Magnetic Wave -This Wave will Obtain the Same Frequency as the Current which Created it, so a Radio Wave can be Made -EM Waves can also make Charged Particles to Oscillate, so it being in the Circuit can make an Alternating Current with the Same Frequency -So this means that a Transmitter and a Receiver can Encode Info.