Section 39 (Audio System (Service Information)): Module-Antenna: Operation
WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
The antenna module receives both AM and FM radio signals supplied by the rear window integral radio antenna and selectively amplifies them. The amplified signal is then sent through the body length coax cable to the radio input.