3G (third-generation) antenna of full-screen intelligent mobile phone and design method of 3G antenna

Abstract

The invention relates to a design method of a 3G (third-generation) antenna of a full-screen intelligent mobile phone and the corresponding antenna. The design method comprises the steps of arranging a high-frequency circuit and a low-frequency circuit of the antenna on a circuit board, wherein the high-frequency circuit and the low-frequency circuit are isolated through an isolating trough, and adjusting the length and the width of the isolating trough to control resonance between the high-frequency circuit and the low-frequency circuit; and arranging a feed point and a ground point, wherein the ground point is arranged on the external side of the feed point, i.e. close to the side of the circuit board; and after an arranged second isolating trough leads out high-frequency second resonance, adjusting the length or the thickness of the second isolating trough to adjust the low-frequency band of the antenna, so as to match with a radio-frequency power amplifier to realize high frequency and high sensitivity. The antenna designed by adopting the design method provided by the invention has the advantages that the volume is small, the performance is excellent and the problem that the low-frequency radiation power and the low-frequency receiving sensitivity of the antenna are decreased because a method of adding a parasitic element to increase bandwidth is adopted can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an antenna for a full-screen smart 3G mobile phone. Background technique [0002] At present, wireless communication technology is developing rapidly. With the full entry into the 3G era, the market share of 2G mobile phones has dropped again and again. With the great success of the Iphone series mobile phones launched by Apple, full-screen smart phones without keyboards have become the mainstream of the market. In order to achieve a cool, cool, thin effect and a good user experience, the internal circuit boards of smart phones often adopt a broken board structure, that is, the main board and the daughter board are separated, one is set on the upper end of the mobile phone, and the other is set on the lower end of the mobile phone. Coaxial connection with standard connectors (Ipex / hrs). This structural design is used in mainstream brands such as Samsung, Huawei, ZTE, Lenov...

AI Technical Summary

Problems solved by technology

If the traditional antenna does not add parasitics, there is only one resonance at high frequency, which can only meet the antenna performance of 2G mobile phones, and cannot meet the bandwidth requirements of the 3G frequency band of mainstream smartphones at all.

However, adding parasitic elements to the traditional antenna line to increase the high-frequency bandwidth will affect the low-frequency bandwidth. At the same time, the low-frequency radiation power will be relatively low, and the low-frequency receiving sensitivity will also deteriorate.

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