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Mobile terminal, multi-antenna system and decoupling method

A multi-antenna system, mobile terminal technology, applied in antenna coupling, antenna, antenna components and other directions, can solve the problems of limiting terminal performance improvement and high device cost, eliminating insertion loss problems, improving isolation, and obvious cost advantages Effect

Inactive Publication Date: 2016-08-17
YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the solutions used in mobile terminals are quadruplexer solutions, which can design the diversity antenna and the high-frequency main antenna into one antenna, but this solution needs to introduce a quadruplexer, which has high cost and It will bring at least 3 dB insertion loss to the RF circuit
These deficiencies greatly limit the improvement of terminal performance

Method used

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  • Mobile terminal, multi-antenna system and decoupling method
  • Mobile terminal, multi-antenna system and decoupling method
  • Mobile terminal, multi-antenna system and decoupling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present invention provides a multi-antenna system, figure 1 A schematic structural diagram of Embodiment 1 of the multi-antenna system of the present invention is shown, including:

[0029] A first antenna 101, a second antenna 102 adjacent to the first antenna 101 and a decoupling circuit 103;

[0030] The decoupling circuit 103 is connected in parallel between the first radio frequency terminal of the first antenna 101 and the second radio frequency terminal of the second antenna 102, and is used to make the The current of the first radio frequency terminal connected to the second radio frequency terminal through the decoupling circuit has the same amplitude and opposite phase as the current generated by the mutual coupling between the first antenna and the second antenna.

[0031] When the two antennas are close to each other, coupling will occur. When the first antenna 101 and the second antenna 102 are coupled, it can be regarded as a path. When the first ante...

Embodiment 2

[0036] The present invention also provides a mobile terminal, including the above-mentioned multi-antenna system, and the mobile terminal may be a metal ID design mobile terminal, or other ID mobile terminals.

[0037] Applying a mobile terminal provided in this embodiment, the decoupling circuit is connected in parallel between the first radio frequency terminal of the first antenna and the second radio frequency terminal of the second antenna, and is used to make the The current connected from the first radio frequency terminal to the second radio frequency terminal through the decoupling circuit has the same amplitude and opposite phase as the current generated by the mutual coupling between the first antenna and the second antenna. The invention uses a decoupling circuit to offset the output energy generated by the mutual coupling of two antennas that are close to each other, and can effectively improve the isolation between the antennas.

Embodiment 3

[0039] The present invention also provides a decoupling method, Figure 4 It shows the flow chart of Embodiment 3 of the decoupling method of the present invention, including:

[0040] Step S101: Obtain the amplitude and phase of a first current generated by mutual coupling between the first antenna and the second antenna when the first radio frequency end of the first antenna is fed;

[0041] Since mutual coupling occurs when the distance is relatively short, when the port of the first antenna is fed, it can be regarded as a path 1 formed between the first antenna and the second antenna, and the amplitude and phase of the first current in path 1 can be obtained.

[0042] Step S102: Determine the target coupling coefficient of the first antenna and the second antenna according to the magnitude of the first current and the opposite phase of the first current;

[0043] In order to offset the first current, it is necessary to use a coupling circuit to generate a current with the...

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Abstract

The invention discloses a mobile terminal, a multi-antenna system and a decoupling method. A decoupling circuit is connected between a first radio-frequency terminal of a first antenna and a second radio-frequency terminal of a second antenna in parallel, so that, when the first radio-frequency terminal feeds, a current of the first radio-frequency terminal which is connected to the second radio-frequency terminal through the decoupling circuit is the same as the current generated by mutual coupling between the first antenna and the second antenna in amplitude and is opposite in phase. Output energy generated by mutual coupling of two antennas with a relatively short distance is offset by the decoupling circuit, so that the isolation degree between the antennas can be effectively improved.

Description

technical field [0001] The invention relates to the field of multi-antenna systems, in particular to a mobile terminal, a multi-antenna system and a decoupling method. Background technique [0002] With the development of terminal technology, we need to make more antennas in a limited space. When the distance between two antennas with similar operating frequencies is small, the isolation between the antennas will deteriorate, affecting communication quality and user experience. [0003] Recently, operators have proposed a 4G CA version solution, which needs to add a main antenna. At present, most of the solutions used in mobile terminals are quadruplexer solutions, which can design the diversity antenna and the high-frequency main antenna into one antenna, but this solution needs to introduce a quadruplexer, which has high cost and It will bring at least 3 dB insertion loss to the radio frequency circuit. These deficiencies greatly limit the improvement of terminal perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/52
CPCH01Q1/521
Inventor 张超
Owner YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD