The above video claims you can make a pocket size FM radio station and the highlight is you dont need an antenna to do this. A small battery is enough to power and it will last for 5 to 7 hrs. This small battery powered FM radiostation even dont need a antenna to broadcast your program into the entire neighborhood for up to a mile or more . It use’s a Onboard Magnetic Loop Antenn, which is the outside copper layer. It is nothing but 2 transistors connected as a pushpull oscillator. Well, I haven’t tested this yet, so its up to you. I just thought to share this which will be useful for you.