Vehicle antennas are used for radios and radios in cars, and some have built-in antennas. The car antenna refers to a mobile communication antenna that is designed and installed on the vehicle. The most common is a sucker antenna. Because the sucker antenna is easy to install and place, the sucker antenna is often used instead of the base antenna in some simple setting stations. Vehicle antennas have shortened, quarter-wavelength, center plus, five-eighth, and one-half wavelength antennas. The higher the work efficiency, the longer the antennas, like mobile phones. The signal tower, the higher the coverage area.
The problem of antenna installation: Due to the limited height of some vehicles and the wind resistance formed by the long antenna when the vehicle is traveling at high speed, it is a problem to cross the bridge hole and enter the underground garage. Therefore, the longer the vehicle antenna, the better. General requirements The car's antenna does not exceed 70 cm. The vans require shorter antennas.
New Antennas: The new "shortened antenna" is small and compact. Although the gain is not high, it is suitable for applications where a concealed antenna is required. General * Vehicles are recommended to install high-amplification antennas, especially in vehicles with a large range of active areas. The 350 MHz high-gain antenna is divided into five-eighths of a wavelength plus a sense of form, and there is a distance one-half wavelength away from the top of the antenna. Sensing coil. The 400MHZ band dual half wavelength antenna has a high gain, and its appearance is characterized by two added coils on the antenna's vibrator. The five-eighth wavelength antenna and the central plus-type antenna also have higher gains, and the price is relatively cheap, so they are widely used. When using as a temporary fixed station antenna, a high gain sucker antenna may be considered, and the length of the antenna does not have to be excessively limited.
Price: Because the sucker antenna is designed according to the environment in which the vehicle is used, it is better to use a metal plate (such as iron sheet) with a radius greater than 1 meter under it when it is used as a stationary object. Due to the fact that imported original car antennas are very expensive and their advantages are not prominent, domestic vehicle mounted antennas are generally used. In the antenna selection stage, the antenna's appearance and gain are mainly referenced. It is recommended to use brand-name products from large manufacturers. The authenticity of the parameters provided by them is high and the manufacturing process is also guaranteed. If it is a batch purchase, it can be customized to the professional antenna manufacturer according to the use frequency band, so as to obtain the best use effect.
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