What is the function of the antenna at the rear of a car?
2 Answers
The main function of the antenna at the rear of a car is to enhance signal reception. Below are the relevant introductions about car antennas: 1. A car antenna intercepts high-frequency radio waves transmitted by broadcasting stations and transmits them to the car's radio, car phone, or radio navigation equipment receiver, as well as demodulates the carrier wave; 2. Considering the conditions of arbitrary movement of the car, except for devices like ETC used in specific locations, general car antennas should be non-directional. The antenna must have excellent water resistance, shock resistance, corrosion resistance, etc., while also considering safety, wind noise, and the impact on the overall vehicle design.
Having driven for over a decade, I've found rear antennas to be quite useful. Primarily, their most basic function is receiving radio signals—cruising on highways relies on them for clear music and traffic updates. Modern shark-fin antennas on new cars are even more advanced, housing GPS chips for more precise navigation. Some luxury vehicles even use them to receive satellite radio signals. The placement at the rear of the roof is deliberate, as this area minimizes interference from the car's metal body, ensuring optimal signal reception. I remember older cars' retractable antennas often getting snapped by tree branches, whereas today's fixed designs are far more practical—sleek and resistant to damage.
