Terminal antenna frequency band extension structure

Abstract

The invention discloses a terminal antenna frequency band extension structure comprising a metal rear cover and a metal middle frame. The metal middle frame is arranged around the metal rear cover. The bottom part of the metal middle frame is provided with two broken seams. The metal middle frame arranged between the two broken seams acts as an antenna radiator. The antenna radiator is provided with a feed point, a grounding point and a metal middle frame wire which is connected with the broken seams. The low frequency band bandwidth and the high frequency band bandwidth generated by the antenna radiator through resonance can be adjusted through the metal middle frame wire. The terminal antenna frequency band extension structure also comprises a metal coupling sheet which is arranged at the tail end of the antenna radiator and positioned at the target position around the grounding point. The metal coupling sheet is connected with the metal radiator through a metal shorting pin so as to extend the low frequency band bandwidth or the high frequency band bandwidth through coupling between the metal coupling sheet and the antenna radiator, wherein the metal coupling sheet is parallel to the bottom part 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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