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Four-antenna mobile terminal system

A mobile terminal, four-antenna technology, applied in the field of four-antenna system structure design, to achieve high gain, wide impedance bandwidth, and reduce mutual coupling

Inactive Publication Date: 2014-09-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the disadvantages of using a single antenna in the existing mobile communication terminal in a complex wireless multipath propagation environment, and to provide a mobile terminal for multiple input and multiple output wireless communication systems. Four-antenna system structure design

Method used

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  • Four-antenna mobile terminal system
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  • Four-antenna mobile terminal system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0028] Table 1 is Figure 5 , Figure 6 Figure 7 Antenna units a, b, c, and d of the implementation example, one of them is connected to the excitation of 2.05GHz (the center frequency of the UMTS frequency band), and when the other three are connected to a 50 ohm matching load, in a typical environment (cross polarizability Γ = 0dB represents a typical indoor multipath environment, Γ = 6dB represents a typical outdoor multipath environment) The average effective gain (Mean Effective Gain) of each antenna unit.

[0029] Table 2 is Figure 5 , Figure 6 Figure 7 When one of the antenna units a, b, c, and d of the implementation example is connected to the excitation of 2.05 GHz (the center frequency of the UMTS frequency band), and the other three are connected to a 50 ohm matching load, the envelope correlation coefficients between the antenna units.

[0030] The present invention provides a wireless communication system, especially relates to a four-antenna system in a m...

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Abstract

The invention is concerned with moveable terminal antenna field. There are four plane monopoles printed on the surface of medium plant and at the four corners of it. The left and right antenna units and its feeding line are symmetrical arrangement about the longitudinal symmetrical axis of the medium plant, while the up and down antenna units keep away from each other in space in type of orthogonal manner. The metal ground relates the metal part to simulate other parts of the moveable parts, besides antenna, and all kinds of ground branch structure to reduce the coupling between antenna units or to adjust the work frequency of antenna units and the ground branch structure is symmetrical arrangement about the longitudinal symmetrical axis of the medium plant. It adopts plane print process with compact size and takes many measures to reduce the coupling of antenna units, increases the width of impedance tape and the plus of antenna and it can be applied into MIMO wireless communication system.

Description

technical field [0001] The invention belongs to the field of mobile terminal antenna design, in particular to a four-antenna system structure design used in a mobile terminal of a multiple-input multiple-output wireless communication system. Background technique [0002] There are multiple scatterers and reflectors in the mobile communication environment, and there are multiple propagation paths at the transmitting and receiving ends of the wireless communication link. Multipath propagation has a serious impact on the effectiveness and reliability of communication. Research shows that some spatial characteristics of received signals caused by multipath can be used to realize signal separation at the receiving end. Multiple-input multiple-output (MIMO) technology uses multiple antennas at both ends of the communication link, and the transmitting end converts the serial code stream output by the source into multiple parallel sub-streams, which are transmitted through different...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/28H01Q1/38H01Q13/08H01Q9/30
Inventor 丁元杜正伟龚克冯正和
Owner TSINGHUA UNIV