There are a few things you need to do in order to make your car radio antenna. First, you’ll need to find a good place to mount your antenna. You can use a mounting bracket or even just some wire ties. Second, you’ll need some wire. You can buy it in any store that sells electronics, or you can make your own by using a wire stripper and some pliers. Third, you’ll need an antenna. There are many different types of antennas available, but the most common ones are the omni-directional antennas. These antennas work best in areas with high signal levels because they omnitransmit all signals in every direction. Fourth, connect your antenna to your car’s audio system. This will allow you to listen to music and other audio files while driving. Finally, make sure that your antenna is working properly by checking it against the signal strength meter on your car’s instrument panel or by using an online service like AntennasNow.com