Dual-band miniaturization MIMO mobile phone terminal antenna system used for 5G communication

Abstract

The invention discloses a dual-band miniaturization MIMO mobile phone terminal antenna system used for 5G communication and belongs to the technical field of mobile phone terminals. The system is formed by an upper layer metal feeding belt, a middle medium substrate and a base layer metal floor and comprises G antenna units comprising an antenna unit 1, an antenna unit 2,..., and an antenna unit G. Each of the antenna unit 1, the antenna unit 3,..., and the antenna unit G-1 is formed by an E-type slit and an inversely arranged L-type feeding belt. Each of the antenna unit 2, the antenna unit 3,..., and the antenna unit G is formed by an E-type slit and a micro-strip feeding belt. By use of the slit antenna resonance principle, two resonance points are produced in 3.45GHz and 4.9GHz. Coverage of 3300-3600MHZ and 4800-5000MHz dual bands is achieved; and requirements on frequency bands in 5G used in China are well met.

Description

technical field [0001] The invention belongs to the technical field of mobile phone terminals, and in particular relates to a dual-band miniaturized MIMO mobile phone terminal antenna system for 5G communication, which is suitable for practical applications. Background technique [0002] With the increasing development of communication technology and the promotion and application of 3G and 4G technologies, mobile users have increasingly strong demands for faster data transmission and better mobile devices. Some countries and regions have begun the fifth generation of mobile communication (5G ) related standards; on November 15, 2017, the Ministry of Industry and Information Technology of my country issued the "Notice on Matters Concerning the Use of 3300-3600MHz and 4800-5000MHz Frequency Bands by the Fifth Generation Mobile Communication System" to determine the 5G intermediate frequency spectrum used in my country. Therefore, China has become the first country in the world t...

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Problems solved by technology

[0006] Aiming at the single frequency band coverage of 5G communication existing in the above-mentioned prior art, it cannot satisfy the traffic required for future 5G communication, and the miniaturization degree of 5G antenna unit is insufficient, occupying too much clearance area of ​​the mobile phone floor, which is not conducive to the future comprehensive The realization problem of screen smartphone, the object of the present invention is to propose a dual-band miniaturized MIMO mobile phone terminal antenna system for 5G communication, this kind of dual-band miniaturized MIMO mobile phone terminal antenna system for 5G communication is composed of a smaller size The dual-frequency resonant multiple-input multiple-output 5G antenna array composed of twelve small antenna elements can realize resonance at two center points of 3.45GHz and 4.9GHz, and the return loss is less than -6dB and the isolation is less than -14dB. Under normal circumstances, the 3300-3600MHz frequency band is successfully covered, the relative bandwidth is 15.5% (3210-3750MHz), the antenna radiation efficiency is greater than 67%, and the envelope correlation coefficient is less than 0.05; when the return loss is less than -10dB, the isolation is less than -15dB Under normal circumstances, the 4800-5000MHz frequency band is successfully covered, the relative bandwidth is about 7.2% (4700-5050MHz), the antenna radiation efficiency is greater than 75%, and the envelope correlation coefficient is less than 0.015; thus better meeting the requirements for 5G in China. The frequency band requirements of the intermediate frequency band can be used in the design of future 5G smartphone antennas, and the engineering practicability is greater

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