How do I attach a Yagi FM antenna to my cellphone?

Say, I take any cell phone which requires me to attach headphones for the purpose of an antenna to make use of the FM radio.

A project that I am doing involves connecting the cellphone with the digital FM tuner to a Yagi antenna for input and to the soundcard of a computer to give the output.

Although I've easily figured out the output part, how I connect the external antenna to my cellphone? Do I join the wire to the headphone itself?















Sounds like it. Try it.