Diversity Antenna System

The diversity antenna system uses both left and right rear quarter windows with an applique to the rear glass. Any damage to the antenna requires replacing the glass.

A diversity antenna system is designed to deliver the best radio signal reception possible. Two antennas are used to form a diversity system. The primary antenna is part of the passenger rear quarter window. This antenna receives both AM and FM signals. The secondary antenna is part of the driver rear quarter window and receives only FM signals for the audio system. RFA signals are also received by this antenna module.

The antenna reception signals are sorted out by the radio antenna modules. The radio antenna modules are enabled when the radio is turned on. When the AM or FM band is selected on the radio, the antenna modules connects the rear window antenna directly to the radio. In addition, when the FM band is selected an enable signal is sent to the passenger antenna module. Superimposed on this enable signal is the strength of the signal being received by the radio tuner. The antenna module performs two functions. It switches between the front and rear antennas, monitoring the radio signal strength and combines both signals and phase aligns them to create one strong signal.

The driver antenna module receives the FM2 signal from the left rear quarter glass and passes this signal to the passenger antenna module. The driver antenna module also receives the RFA and TPM signals and passes them via class 2 to the appropriate module. The passenger antenna module receives the FM1 signal from the right rear quarter glass where it then combines the two signals to be sent to the radio via coax. The passenger antenna module is powered by the driver antenna module via the FM2 signal coax. The FM composite signal from the radio provides feedback of signal quality to the passenger antenna module. This signal is 5-8 volts when in FM mode and 0v when in AM.