Why do some cars have a shark-fin antenna?
The small shark-fin-shaped part on a car’s roof is usually more than a design feature.
The small shark-fin-shaped part on a car’s roof is usually more than a design feature. It may house several antennas that receive radio and navigation signals and help the car connect to mobile networks.
What can a shark-fin antenna contain?
Depending on the car model and equipment, the roof antenna may support one or more systems:
- AM, FM and digital radio (DAB);
- GPS or other satellite navigation systems;
- mobile communication and the car’s internet connection;
- Wi-Fi or Bluetooth;
- other wireless connectivity features on some models.
Several types of connectivity can be combined in one antenna module. The exact setup varies by vehicle: a shark fin may not contain every antenna listed above, and some cars place antennas in the glass or elsewhere in the bodywork.
Why are long aerials less common?
A low-profile roof antenna suits the streamlined shape of a modern car and protrudes less than a long mast aerial. It is less exposed to branches, low ceilings and other obstacles. A compact roof module can also house several antennas in one place.
If the antenna is cracked or loose, have it checked. Damage can affect radio or other connectivity functions and may allow water to enter around the roof mounting point. Replacement antennas should match the car’s model and equipment.
