Antenna: Description and Operation

Antenna

Antenna Amplifier Component Location





Screen Antenna Layout





The antenna systems fitted to the vehicle comprise:
^ AM (amplitude modulation) (glass mounted)
^ FM (frequency modulation) (glass mounted)
^ FM (frequency modulation) diversity (glass mounted, where fitted)
^ TV (glass mounted, where fitted)
^ Multiband telephone antenna (roof mounted, where fitted)
^ GPS (global positioning system) antenna (roof mounted, where fitted)
^ SDARS (roof mounted NAS only)
^ VICS antenna and beacon antenna (Japan only where fitted)

FM (frequency modulation) Antennas

FM (frequency modulation) Antenna Amplifier





The AM (amplitude modulation) /FM (frequency modulation) antennas are located in the rear side widows. On vehicles with the low line audio system the AM (amplitude modulation) /FM (frequency modulation) antenna is located in the LH (left-hand) side screen. On vehicles with a high line audio system the audio system will be equipped with FM (frequency modulation) diversity tuning. This system ensures that the strongest of two signals is used by the radio system to ensure the best possible FM (frequency modulation) reception. The standard AM (amplitude modulation) /FM (frequency modulation) antenna is screen mounted in the LH (left-hand) rear side window and is connected to an antenna amplifier located above the screen. The diversity system uses the same side window antenna and amplifier but also uses RH (right-hand) side screen.

TMC Antenna Amplifier





The Traffic Message Channel (TMC) signals are received through the normal radio signals via the RDS network. The signals are routed separately form the radio signals via a separate antenna amplifier located on the LH (left-hand) rear side window.

GPS Antenna





The GPS (global positioning system) antenna is located in the roof mounted pod, which is located in the center of the roof at the rear of the vehicle. The GPS (global positioning system) antenna is connected to the navigation computer by a coaxial cable.

TV Antenna

TV Antenna Amplifier





Where a television system is specified there are four TV antenna elements two in each of the rear side windows. Each element has an antenna amplifier which is connected to the TV tuner module by a coaxial cable.

The TV RF antenna amplifiers are located just above the rear quarter light, behind the trim. The four TV antenna amplifiers boost the received RF signal before it is collected and processed by the TV tuner. The TV antennae can receive RF signals of between 48 and 860 MHz.

Multiband Telephone Antenna





The multiband telephone antenna is located in the roof mounted pod, which is located in the center of the roof at the rear of the vehicle and is connected directly to the Telephone Control Module (TCM) via a single coaxial cable.

Satellite Digital Audio Radio System (SDARS) Antenna (NAS Only)

SDARS antenna





The SDARS antenna is located in the roof mounted pod, which is located in the center of the roof at the rear of the vehicle. The SDARS antenna has two connections to the SDARS tuner, one for satellite transmissions the other for terrestrial transmissions from repeater stations.

The antenna comprises two antenna elements:
^ A printed dipole antenna for receiving satellite signals
^ A printed monopole antenna for receiving terrestrial signals

The two antennas allow the system to receive SDARS transmissions in built up areas where signals form satellites would normally be blocked.

VICS ANTENNAS (Japan only)

VICS Beacon Antenna





The VICS control module uses the rear RH (right-hand) side window antenna to receive VICS information. The Control module also uses an infra red beacon antenna located in the middle on top of the instrument panel adjacent to the sunlight sensor.