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Compact low-coupling extensible MIMO antenna based on orthogonal mode

An orthogonal mode and compact technology, which is applied in the field of compact low-coupling scalable MIMO antennas, can solve the problems of complex antenna structures, inability to popularize MIMO systems, and the inability to effectively reduce the overall size of antennas to achieve low-coupling effects

Active Publication Date: 2021-04-06
COMMUNICATION UNIVERSITY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this ring-shaped down-coupling structure increases the size of the antenna in the vertical direction, making it difficult to apply to massive MIMO antenna arrays.
[0006] It can be seen from the decoupling structure of the existing MIMO antenna that most of them add special structures or use special materials in the antenna unit, and there are the following problems: (1) Due to the introduced decoupling structure or material, the overall size of the antenna cannot be obtained Effective reduction, making it impossible to realize the compact structure of the MIMO antenna; (2) the structure of the antenna is more complicated, the processing requirements are high, and the cost investment is large; (3) lack of scalability, the special decoupling structure is only applicable to a specific The unit structure and number of ports cannot be popularized to MIMO systems with more ports

Method used

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  • Compact low-coupling extensible MIMO antenna based on orthogonal mode
  • Compact low-coupling extensible MIMO antenna based on orthogonal mode
  • Compact low-coupling extensible MIMO antenna based on orthogonal mode

Examples

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Effect test

Embodiment 1

[0055] As shown in Figure 1, the compact low-coupling scalable MIMO antenna based on orthogonal mode includes microstrip line feed port 1, coaxial line feed port 2, ground metal plate 3, metal microstrip feed line 7, double-layer A dielectric plate and a rectangular radiating metal patch 9 , the rectangular radiating metal patch 9 includes a first rectangular radiating metal patch 5 and a second rectangular radiating metal patch 6 . The coaxial line feed port 2 is located at the zero point of the electric field distribution generated by the microstrip line feed port 1, the double-layer dielectric plate is arranged above the grounded metal plate 3, and the first rectangular radiation metal patch 5 is connected through the metal microstrip feed line 7 To the feed port 1 of the microstrip line, the second rectangular radiating metal patch 6 is connected to the feed port 2 of the coaxial line through a coaxial probe.

[0056] The upper and lower dielectric boards of the double-lay...

Embodiment 2

[0064] This embodiment is improved on the basis of Embodiment 1, and no double-layer dielectric board and two radiating metal patches are needed. Referring to FIG. The patch 9 is one piece, and a gap ring 8 is etched with the center of the rectangular radiating metal patch 9 as the center. The grounding metal plate 3, the single-layer dielectric plate and the rectangular radiating metal patch 9 are placed in parallel in the vertical direction, and the grounding metal The midpoints or centers of the board 3 , the single-layer dielectric board, the rectangular radiating metal patch 9 and the gap ring 8 are all located on a straight line parallel to the z-axis. Wherein the metal microstrip feeder 7 is an irregular shape, and the rectangular radiation metal patch 9 covers the top surface of the single-layer dielectric board, and is connected to the coaxial feeder port 2 by the metal microstrip feeder 7, and the coaxial probe is placed In the single-layer dielectric board, the rect...

Embodiment 3

[0070] The compact low-coupling scalable MIMO antenna system based on the orthogonal mode in this embodiment includes several antenna units, as shown in FIG. Rectangular radiating metal patch 9, single-layer dielectric board, and grounding metal board 3.

[0071] The antenna grounding metal plate 3 adopts a grounding rectangular metal patch, the size of the metal grounding plate 3 is the same as that of the bottom surface of the dielectric plate 4 , and the rectangular radiating metal patch 9 covers the top surface of the dielectric plate 4 .

[0072] The material of the dielectric plate 4 in this embodiment is epoxy resin plate FR4 with a dielectric constant of 4.4, placed on the xoy surface, as shown in Figure 12, the size of the microstrip unit forming this embodiment is 197.1mm×197.1mm ×2.5mm, the size of the upper patch is 187.7mm×187.7mm, the overall size of the antenna unit is 0.49λ 0 ×0.49λ 0 ×0.006λ 0 , where λ 0 is the free-space wavelength at a center frequency ...

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Abstract

The invention discloses a compact low-coupling extensible MIMO antenna based on an orthogonal mode, which comprises a microstrip line feed port, a coaxial line feed port, a grounding metal plate, a metal microstrip feed line, a dielectric plate and a rectangular radiation metal patch, wherein the dielectric plate is arranged above the grounding metal plate, and the rectangular radiation metal patch is attached to the dielectric plate; the rectangular radiation metal patch is connected to the microstrip line feed port through a metal microstrip feed line, and the rectangular radiation metal patch is connected to the coaxial line feed port through a coaxial probe. The invention further discloses a compact low-coupling extensible MIMO antenna system based on the orthogonal mode. The two excitation ports are utilized to excite the radiator at different positions to obtain two radiation modes with orthogonality so as to obtain a low coupling characteristic; and the antenna unit can be expanded into a compact low-coupling antenna array with any number of ports.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a compact low-coupling scalable MIMO antenna based on an orthogonal mode. Background technique [0002] In a wireless communication system, by using multiple antennas at the transmitting end and the receiving end at the same time, that is, using Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) technology, without increasing spectrum resources and antenna transmit power, It can make full use of space resources, double the channel capacity of the system and improve the communication quality. As the transmitting and receiving device in MIMO wireless communication system, antenna unit design and array configuration are important factors affecting the performance of MIMO system. With the development of large-scale and ultra-large-scale MIMO technology in 5G / 6G mobile communication systems, as well as the requirements of base stations and mobile terminals for antenna equip...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/50H01Q1/52
CPCH01Q1/38H01Q1/50H01Q1/523
Inventor 朴大志王檬左杰杜青张林坤
Owner COMMUNICATION UNIVERSITY OF CHINA
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