So, I noticed my phone's FM app worked when I plugged in my headphones, yet when they weren't plugged in, my phone couldn't receive a single FM station. So I came to a conclusion: My phone must be using a technology similar to some MP3 players where the cord to the headphones/speakers was used as an FM antenna. So I thought: "Ok, but how? I still would have to filter lower frequencies." Then I remembered, " HIGH PASS FILTER" And thats how I came to the conclusion to make this circuit.
10KHz is a standard audio from the Aux alone
100MHz is an FM station
