Principles of Operation: Antenna
WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The antenna receives both AM and FM radio waves. The antenna is built into the rear window glass and has a module to interpret the audio signals. The audio signals are then sent to the audio unit through the antenna cable.