Circuit/System Description

The diversity antenna system uses antennas applied as appliques to the rear glass and two antenna modules. The right antenna 1 module receives both AM and FM signals, while the left antenna 2 module receives FM signals only. The antenna module receives the signals from the glass antenna. Each antenna module is connected to the radio by a coaxial cable.

The radio antenna module is enabled when the radio is turned on. The radio provides battery voltage to the antenna module using the center conductor of the antenna coaxial cable. When a 12 V signal is seen by the module on the center conductor of the antenna coax, the received signals are amplified.

When the AM band is selected on the radio, the antenna 1 module connects the AM antenna to the radio. When the FM band is selected, both antenna modules provide FM signals to the radio.