What is that on the rear roof of the car?

1 Answers
EvangelineMarie
07/29/25 10:36pm
The thing on the rear roof is called a shark fin, also known as a car antenna, which contains TV and GPS antennas. Here is an introduction to car antennas: 1. Car antenna: A car antenna is a device that intercepts high-frequency radio waves transmitted by broadcasting stations and delivers them to the car radio, mobile phone, or radio navigation equipment receiver for demodulation. 2. Features: In terms of the usage environment, the antenna must have excellent water resistance, vibration resistance, corrosion resistance, etc., while also considering safety, wind noise, and the impact on the overall vehicle design. Characteristics due to vehicle structure: The single-axis antenna, which forms the basis of car antennas, should have a length of 1/4 of the received radio wavelength, and the length of the antenna that can be installed on the car is only about 1m.
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