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Decoupling method and decoupling network of MIMO antenna of mobile communication system terminal

A mobile communication system and antenna technology, applied in the field of decoupling networks, can solve the problems of being easily affected by the external environment, the difference in antenna efficiency, and the narrow working bandwidth, achieving strong portability and compatibility, simple configuration, and improved isolation. Effect

Inactive Publication Date: 2017-04-19
KUNSHAN RUIXIANG XUNTONG COMM TECHCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, HP and QUALCOMM have adopted polarization and space diversity methods for decoupling on their terminals, but they are large in size and vulnerable to the external environment.
Panasonic and INTEL companies use signal processing chips and tuning modules between the transmitting and receiving antennas to ensure the real-time and accuracy of decoupling. The disadvantages are narrow bandwidth, high cost and complex structure.
Scholars from the Department of Electrical Engineering at UCLA proposed a mode-based tightly coupled low-correlation antenna array, which can perform 360-beam scanning according to the signal combination algorithm, but the efficiency of the antenna is different in different modes, and the working bandwidth is narrow , larger volume

Method used

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  • Decoupling method and decoupling network of MIMO antenna of mobile communication system terminal
  • Decoupling method and decoupling network of MIMO antenna of mobile communication system terminal
  • Decoupling method and decoupling network of MIMO antenna of mobile communication system terminal

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Effect test

Embodiment 1

[0022] The decoupling method of the MIMO antenna of the mobile communication system terminal, by inserting an additional coupling resonator between the antenna ports, introduces an equal-amplitude and anti-phase current that cancels out the coupling current, thereby improving the isolation of the dual-antenna system and improving the antenna Radiation efficiency, greatly reducing the spatial correlation of the antenna, and achieving decoupling. The coupling resonator uses an adjustable low-pass filter to realize decoupling.

Embodiment 2

[0024] The decoupling method of the MIMO antenna of the mobile communication system terminal, by inserting an additional coupling resonator between the antenna ports, introduces an equal-amplitude and anti-phase current that cancels out the coupling current, thereby improving the isolation of the dual-antenna system and improving the antenna Radiation efficiency, greatly reducing the spatial correlation of the antenna, and achieving decoupling. The coupling resonant cavity realizes decoupling through two resonant units composed of capacitance and inductance and direct coupling and cross coupling between them.

Embodiment 3

[0026] The decoupling network realized by using the decoupling method of the terminal MIMO antenna of the mobile communication system, such as figure 1 As shown, it includes antenna 1 and port 1 corresponding to antenna 1, antenna 2 and port 2 corresponding to antenna 2, and a coupling resonator; the power fed into port 1 is consumed through three paths: path 1 radiates to free space; Path 2 couples to antenna 2 through free space and causes interference to antenna 2; while the power of path 3 is coupled to antenna 2 through the coupling resonator; the coupling resonator can make the coupling through path 2 and path 3 equal amplitude If the phase is reversed, port 2 will not receive power from port 1, achieving decoupling. In the figure above, the core part is the coupling resonator, and its realization in different forms corresponds to different forms of circuits that solve multi-antenna coupling. Realizing the circuit in the form of an integrated circuit can realize the com...

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Abstract

The invention discloses a decoupling method and decoupling network of an MIMO antenna of a mobile communication system terminal. The decoupling network comprises an antenna 1 and a port 1 corresponding to the antenna 1, an antenna 2 and a port 2 corresponding to the antenna 2, and a coupling resonant cavity. The extra coupling resonant cavity is connected between the antenna ports and an equivalent-amplitude inverted-phase current is introduced into a coupling current for mutual cancelling and thus the port 2 does not receive the power form the port 1, thereby realizing decoupling. The antenna signal coupling elimination effect is good. The configuration is simple and the occupied system space resources are low, so that the isolation degree of the dual-antenna system can be improved, the antenna radiation efficiency can be enhanced, the space correlation of the antenna can be reduced substantially, and decoupling is realized.

Description

technical field [0001] The invention relates to a decoupling method and a decoupling network for a terminal MIMO antenna of a mobile communication system. Background technique [0002] With the large-scale commercialization of the fourth-generation wireless communication network and the rapid development of the fifth-generation mobile communication technology, more and more mobile terminals begin to use MIMO dual antennas to increase the wireless transmission rate. However, due to the limited space in the mobile phone, the energy received / transmitted by each antenna in the dual-antenna system will interfere with the transmission and reception of the other antenna through spatial coupling, thereby reducing the data throughput of the MIMO dual-antenna system itself. In order to improve throughput, a necessary condition is to have low correlation. Therefore, how to achieve effective multi-element antenna decoupling in a small volume, reduce its correlation, obtain diversity ga...

Claims

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Application Information

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IPC IPC(8): H01Q1/52
CPCH01Q1/521
Inventor 袁涛王洪洋马磊
Owner KUNSHAN RUIXIANG XUNTONG COMM TECHCO
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