Frequency band expanding structure of terminal antenna

Abstract

The invention discloses a frequency band expanding structure of a terminal antenna. The frequency band expanding structure comprises a metal rear cover, a metal middle frame and a metal coupling piece. The metal middle frame is arranged on the periphery of the metal rear cover. Two disconnected gaps are formed in the bottom of the metal middle frame. The part, located between the two disconnected gaps, of the metal middle frame serves as an antenna irradiation body. The antenna irradiation body is provided with a feeding point, a grounding point and a metal middle frame wire connected to the disconnected gaps. By means of the metal middle frame wire, the low-frequency-band bandwidth and the high-frequency-band bandwidth resonated by the antenna irradiation body can be adjusted; the metal coupling piece is arranged at the tail end of the antenna irradiation body and located at the target position around the grounding point and is connected with the metal irradiation body through a metal short connecting needle so that the low-frequency-band bandwidth or the high-frequency-band bandwidth can be expanded through the coupling between the metal coupling piece and the antenna irradiation body, wherein the metal coupling piece is parallel to the top of the metal rear cover.

Description

technical field [0001] The invention relates to antenna technology, in particular to a frequency band extension structure of a terminal antenna. Background technique [0002] With the fourth generation (4G, 4 th Generation) communication technology is developing rapidly, and current mobile terminals are increasingly supporting 4G networks, such as Long Term Evolution (LTE, Long Term Evolution) networks, which require antennas to have wider bandwidths to meet user needs. On the other hand, with the further popularization of 4G terminals, the homogenization of mobile phones is becoming more and more serious, and people have higher and higher requirements for mobile phones, such as: the texture of the body, the user's online experience, etc. For this reason, many mobile phone manufacturers have launched metal models. Among them, all-metal integrated mobile phones are popular among consumers because of their beautiful appearance, high structural strength, and superior thermal ...

AI Technical Summary

Problems solved by technology

While all-metal mobile phones improve the quality and grade of mobile phones, the performance of the antenna is also reduced due to the natural signal shielding characteristics of metal. challenge

[0003] The existing antenna design for mobile terminals can achieve the bandwidth coverage of GSM800 / 900 in the low frequency band and the bandwidth coverage of DCS / PCS / UMTS / LTE2300 / 2500 in the high frequency band. However, in some application scenarios, the mobile terminal needs to further expand the frequency band to meet the needs of users. For example, the Latin American region needs a working frequency band of 700MHz. It can be seen that how to meet the structural design constraints of the mobile terminal Extending the frequency band of the antenna is an urgent problem to be solved

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