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What is the wire with an antenna at the back of the car?

1 Answers

DelLucille

07/30/25 5:05am

Car antenna, also known as vehicle-mounted antenna, is generally used for car radios and stations, and can be divided into built-in and external antennas. However, depending on the purpose of the vehicle, other antennas may also be installed. For example, buses have DVB-T antennas and vehicle-mounted TV antennas. Logistics and taxis are also equipped with GSM antennas and GPS satellite antennas. The following are the characteristics of vehicle-mounted antennas: 1. Features brought by environmental use: Considering the arbitrary mobile usage conditions of vehicles, except for devices like ETC used in specific locations, general vehicle-mounted antennas should be non-directional. Currently, improvements in radio and TV receivers are being actively promoted, with some car models using two antennas for radio reception and 3-4 antennas for TV reception. For the usage environment, antennas must have excellent water resistance, vibration resistance, corrosion resistance, etc., while also considering safety, wind noise, and the impact on the overall vehicle design. 2. Features brought by vehicle structure: The single-axis antenna, which forms the basis of vehicle-mounted antennas, should have a length of 1/4 of the received wavelength, but the length of antennas that can be installed on vehicles is only about 1m. 3. Features brought by multimedia: While ensuring antenna reception performance, preventing interference between antennas, feasibility of installation, and the commercial appeal of appearance, multiple antennas should be installed in limited areas.

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