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Metamaterial-based small dual-frequency MIMO antennas

A metamaterial and antenna technology, applied in the field of wireless communication, can solve problems such as bandwidth impact, and achieve the effect of small size, easy conformality, and easy processing.

Inactive Publication Date: 2015-03-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, the patch antenna elements in MIMO systems, especially in mobile terminals, are usually close together, and their bandwidth will be greatly affected compared to a single antenna

Method used

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  • Metamaterial-based small dual-frequency MIMO antennas
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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 As shown, the present invention is aimed at the application requirements of MIMO antennas for small mobile terminals in two frequency bands of WLAN 2.4GHz and 5GHz, and has carried out research on dual-band MIMO antennas based on metamaterials: the antennas are left-right symmetrical, including a rectangular FR4 base 1, in a rectangular Both sides of the upper surface of the FR4 substrate 1 are provided with two rectangular grounding pieces 2, a microstrip line 3 and a circular monopole antenna 4; the two rectangular grounding pieces 2 are symmetrically distributed on both sides of the microstrip line 3 , the microstrip line 3 is connected to the circular monopole antenna 4, and a rectangular slot 5 along the direction of the microstrip line 3 and a bow concentric with the circular monopole antenna 4 are opened...

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Abstract

The invention discloses metamaterial-based small dual-frequency MIMO (multiple input and multiple output) antennas. The antennas are symmetric bilaterally and comprise an FR4 substrate; two rectangular grounding plates, a micro-strip line and a circular monopole antenna are arranged at two sides of the upper surface of the rectangular FR4 substrate; two rectangular grounding plates are symmetrically distributed at two sides of the micro-strip line; the micro-strip line is connected with the circular monopole antenna; a rectangular groove along the direction of the micro-strip line and an arch-shaped groove concentric to the circular monopole antenna are formed on the circular monopole antenna; one end of the rectangular groove is communicated with the arch-shaped groove and the other end is connected with an interdigital capacitor; and a split resonant ring is arranged at the middle of the upper surface of the rectangular FR4 substrate. The metamaterial-based small dual-frequency MIMO antennas have low cost, smaller size, dual-frequency features and wider impedance bandwidth in the frequency bands of WLAN 2.4GHz and 5GHz; and the antennas have the advantages of low coupling, high isolation, low profile, easy conformation and convenience in processing and manufacturing and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication and antenna technology, and relates to a miniaturized dual-frequency MIMO antenna that effectively suppresses coupling between antennas. Background technique [0002] Multiple-input multiple-output (MIMO) system is a research hotspot in the field of wireless communication in recent years, and is regarded as an important part of the fourth generation mobile communication technology. Its main idea is to use multiple antennas at the transmitting end and receiving end of the wireless link at the same time, and use diversity technology to effectively increase the channel capacity or improve the reliability of the system without occupying additional spectrum bandwidth and antenna transmission power. sex. The high performance of a MIMO system mainly depends on the fact that the multipath fading signals reaching each antenna element must be highly correlated, which requires low mutual coupling and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/52H01Q1/38H01Q1/48H01Q1/50H01Q5/10H01Q5/20H01Q5/321H01Q21/28
Inventor 刘庆崇陈浙峰刘玉沙胡骏何赛灵
Owner ZHEJIANG UNIV
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