Novel low-profile high-gain vehicle-mounted antenna

Abstract

The invention discloses a novel low-profile high-gain vehicle-mounted antenna. The vehicle-mounted antenna comprises a metal layer, a matching circuit and an automobile metal shell, wherein an annularnotch is formed in the top edge of the metal layer; the length of the inner ring of the annular notch determines the center frequency of the working frequency interval of the antenna; the metal layeris connected with a signal source after passing through the matching circuit; and the metal layer and the matching circuit are mounted at the top part of the automobile metal shell, so that radiationand collection of signals can be realized by fully utilizing the metal shell. Compared with a traditional shark fin antenna and a glass antenna, the novel low-profile high-gain vehicle-mounted antenna is low in profile, capable of fully utilizing the automobile body as the bottom of the antenna, and higher in gain; the working frequency of the antenna can be adjusted in a large range through a tuning circuit and is not influenced by the structure of the vehicle body, so that the antenna has the advantages of being convenient to install and wide in application range, and can be used for replacing various existing vehicle-mounted communication antennas.

Description

technical field [0001] The invention relates to an antenna, in particular to a novel low-profile high-gain vehicle-mounted antenna. Background technique [0002] With the rapid development of wireless communication, as the carrier of signal transmission and reception, antenna has an important application in wireless communication. With the continuous improvement of the performance of wireless communication systems, the communication industry has put forward a series of requirements for antenna design, such as high gain, miniaturization and low cost. [0003] As an important medium for communication between people in the car and the outside world, the performance of the vehicle antenna directly affects the quality of communication. Generally speaking, the higher the antenna profile, the better the antenna gain and other parameters; but in order to reduce air resistance, the shape of the car is usually streamlined, which limits the parameters such as the profile of the vehicl...

AI Technical Summary

Problems solved by technology

Generally speaking, the higher the antenna profile, the better the antenna's gain and other parameters; but in order to reduce air resistance, the shape of the car is usually streamlined, which limits the parameters such as the profile of the vehicle antenna, which in turn limits the performance of the vehicle antenna such as gain

In order to balance the gain and size of the antenna, the shark fin antenna has been widely used in recent years. Its smooth shape can reduce the wind resistance caused by the protruding antenna to a certain extent, and its higher antenna profile is conducive to accommodate higher gain. antenna, but for the low frequency band, the gain brought by the shark fin antenna is not satisfactory

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