Mobile terminal and antenna structure thereof

Abstract

The invention discloses a mobile terminal and an antenna structure thereof. The antenna structure of the mobile terminal comprises a main board and an antenna main body connected with the main board, and further comprises an antenna tuning circuit located between the main board and the antenna main body, wherein the antenna tuning circuit comprises a tuning piece and a variable capacitor, one end of the tuning piece is directly connected with the main board, and the other end of the tuning piece is bent, and then connected with the main board through the variable capacitor. Accordingly, the antenna structure of the mobile terminal influences tuning frequency of an antenna by adjusting capacitance value of the variable capacitor, achieves tuning of the frequency of the antenna, greatly broadens the bandwidth of the antenna, and improves efficiency of the antenna. A circuit structure of the antenna structure of the mobile terminal is simple, and easy to achieve, and accordingly the antenna structure of the mobile terminal achieves the purposes of being low in cost and stable in performance. Additionally, electron devices of a USB (universal serial bus) connector, a microphone and the like are placed on the tuning piece, influences of the electron devices of the USB connector, the microphone and the like on the antenna are effectively reduced, performance of the antenna is improved, and simultaneously improvement of self performance of the electron devices of the USB connector, the microphone and the like is facilitated.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a mobile terminal and its antenna structure. Background technique [0002] With the rapid development of wireless communication technology, the mobile phone standard has changed from 2G to 3G and then to 4G. There are more and more antenna frequency bands, and the requirements for multi-frequency antennas are getting higher and higher. The demand for small-sized, multi-band antennas is getting stronger and stronger. . In order to expand the bandwidth of the antenna and improve the performance of the antenna, some solutions in the prior art realize the adjustable frequency of the antenna by designing a complex circuit structure, which is difficult to implement, high in cost and unstable in performance. [0003] Moreover, in order to reduce the impact of the antenna on the human head, the main antenna of the mobile terminal is generally located at the bottom of the ...

AI Technical Summary

Problems solved by technology

In order to expand the bandwidth of the antenna and improve the performance of the antenna, some solutions in the prior art realize the adjustable frequency of the antenna by designing a complex circuit structure, which is difficult to realize, high in cost and unstable in performance.

[0003] Moreover, in order to reduce the impact of the antenna on the human head, the main antenna of the mobile terminal is generally located at the bottom of the terminal, and electronic devices such as USB connectors and microphones are also placed at the bottom of the terminal, usually placed around or below the antenna, so that These electronic devices have a certain impact on the space and efficiency of the antenna, reducing the performance of the antenna

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