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Dual-polarized antenna unit, quar-polarized antenna and MIMO system

A dual-polarized antenna and antenna unit technology, applied in antennas, resonant antennas, loop antennas, etc., can solve the problems of complex antenna design and overall structure, and achieve the effects of simple structure and design, convenient implementation, and low coupling

Inactive Publication Date: 2017-11-03
COMMUNICATION UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dual-polarized electric and magnetic dipole antenna units are two independent antennas designed separately, and the coupling between them is relatively large. It is necessary to increase the isolation of the two antennas by adding electromagnetic bandgap (EBG) materials. , the design and overall structure of the antenna are more complex

Method used

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  • Dual-polarized antenna unit, quar-polarized antenna and MIMO system
  • Dual-polarized antenna unit, quar-polarized antenna and MIMO system
  • Dual-polarized antenna unit, quar-polarized antenna and MIMO system

Examples

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Effect test

Embodiment 1

[0030] like figure 1 As shown, it proposes a dual-polarized antenna unit. The antenna unit includes a single-loop antenna body. It is characterized in that the single-loop antenna body has a zero phase shift structure, and the single-loop antenna body also has a first Excitation port 100 and second excitation port 101; As shown in Figure 3 (b), when described first excitation port 100 feeds power, input first excitation current at described first excitation port, in the first excitation current Under excitation, the zero-phase-shift structure makes the single-loop antenna form a current distribution with uniform amplitude and in-phase, and its radiation characteristic is equivalent to a magnetic dipole; as shown in Figure 3(a), in the first When the two excitation ports 101 are fed, a second excitation current that is equal in magnitude and opposite to the first excitation current is input at the second excitation port, and under the excitation of the second excitation current...

Embodiment 2

[0040] like Figure 4 As shown, a quad-polarized MIMO antenna composed of the dual-polarized antenna elements is shown. Wherein, the two dual-polarized antenna elements are formed orthogonally at the same point. Specifically, the four-polarized antenna includes a first dual-polarized antenna unit 1 located in the xy plane, the axis of the loop antenna is along the z-axis, and a second dual-polarized antenna unit 2 located in the xz plane, the axis of the loop antenna The electromagnetic field components that can be detected by this four-polarized antenna along the y-axis are Ex, Ez and Hy, Hz.

[0041] In one embodiment, the two radiation modes of the two loop antennas both work in the 2.45GHz frequency band.

Embodiment 3

[0043]The core technical problem to be solved by the present invention is to design a low-coupling dual-polarized electric and magnetic dipole antenna using the same loop antenna as a radiator, and a compact quadrupole antenna composed of the dual-polarized loop antenna. Polarized MIMO antenna system. This dual-polarized antenna consists of a loop antenna that excites different modes. The loop antenna can realize two radiation modes, electric dipole and magnetic dipole; among them, the electric dipole radiation mode is realized by coplanar waveguide feeding, and through A coplanar stripline feed enables a magnetic dipole radiation pattern; the electric and magnetic dipole modes are mutually orthogonal, and the centers of the electric and magnetic dipoles coincide with each other. In addition, the coupling between magnetic dipoles and electric dipoles is relatively low, resulting in high isolation.

[0044] This four-polarized antenna is composed of two co-point orthogonal loo...

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PUM

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Abstract

The invention discloses a dual-polarized antenna unit, a quar-polarized antenna and an MIMO system. The antenna unit comprises a mono-loop antenna body; the mono-loop antenna body has a zero phase shifting structure; the mono-loop antenna body also comprises a first excitation port and a second excitation port; when the first excitation port feeds, a first excitation current is input in the first excitation port; under the effect of the first excitation current, current distribution with uniform amplitude and the same phase is formed in the mono-loop antenna body by virtue of the zero phase shifting structure, and the radiation characteristic is equivalent to be a magnetic dipole; when the second excitation port feeds, a second excitation current is input in the second excitation port; and under the effect of the second excitation current, current distribution which is symmetrical around two feed connecting lines and with the same amplitude and opposite directions is formed in the mono-loop antenna body by virtue of the zero phase shifting structure, and under the excitation of the second excitation current, the radiation characteristic of the mono-loop antenna body is equivalent to be an electric dipole which is orthogonal with the magnetic dipole.

Description

technical field [0001] The invention belongs to the field of antennas, and in particular relates to a dual-polarization antenna unit based on a single loop, a four-polarization antenna formed therefrom, and a MIMO system. Background technique [0002] The multiple-input multiple-output (MIMO) system uses multiple antennas at the transmitting and receiving ends at the same time, and uses the multipath scattering in the channel to establish multiple parallel spatial sub-channels at the same time, which doubles the spectral efficiency and channel capacity of the communication system. , has been widely used in 802.11n, 802.16 and 4G LTE systems. In the fifth generation mobile communication system, massive MIMO technology has also become one of its core technologies. However, in base stations and portable mobile devices, the space for placing antennas is very limited, so how to realize compact and low-coupling MIMO antenna arrays is of great significance to the application and im...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/50H01Q7/00H01Q9/26H01Q21/00H01Q21/29
CPCH01Q1/36H01Q1/50H01Q7/00H01Q9/26H01Q9/265H01Q21/0006H01Q21/29
Inventor 朴大志宋俊平
Owner COMMUNICATION UNIVERSITY OF CHINA
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