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Impedance matching method and apparatus, and mobile terminal

An impedance matching and matching network technology, applied in the field of communication, can solve problems such as low performance and long time-consuming impedance matching, and achieve the effects of improving RF performance, reducing time, and avoiding traversal attempts.

Active Publication Date: 2017-10-24
YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an impedance matching method and device, and a mobile terminal, which can solve the problems of long time-consuming impedance matching and low performance in the prior art

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  • Impedance matching method and apparatus, and mobile terminal
  • Impedance matching method and apparatus, and mobile terminal
  • Impedance matching method and apparatus, and mobile terminal

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Embodiment Construction

[0023] In order to further explain the technical means and functions adopted by the present invention to achieve the intended purpose, the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. Through the description of the specific implementation, it should be possible to gain a deeper and more specific understanding of the technical means and effects of the present invention to achieve the intended purpose. However, the attached drawings are only for reference and description, and are not used to explain the present invention. limit.

[0024] Such as figure 1 As shown, an embodiment of the present invention provides an impedance matching method, including:

[0025] S11, acquiring a signal voltage standing wave ratio when a signal is transmitted between the radio frequency front end and the antenna;

[0026] S12, changing the capacitive or inductive connection of the matching network between the radio fr...

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Abstract

The invention, which relates to the communication field, discloses an impedance matching method and apparatus, and a mobile terminal, so that problems of long impedance matching time and low performance in the prior art are solved. The method comprises: a signal voltage standing wave ratio during signal transmission between a radio-frequency front terminal and an antenna is obtained; capacitance connection or inductance connection of a matched network between the radio-frequency front terminal and the antenna is changed and thus whether the transmission impedance of the matched network is capacitive or inductive is determined based on a changing trend corresponding to the signal voltage standing wave ratio; and on the basis of the determined result, the transmission impedance of the matched network is adjusted, so that the signal voltage standing wave ratio is lower than or equal to a preset threshold value.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an impedance matching method and device, and a mobile terminal. Background technique [0002] Due to the large number of operating frequency bands in mobile phones, the operating frequency range covers 700MHz-3GHz, and the design of mobile phone antennas is becoming more and more difficult. The function of the antenna automatic tuning system in the mobile phone is mainly to maintain a good matching state between the antenna and the radio frequency front end of the mobile phone by changing the matching component value in the access path to ensure the performance of the antenna. [0003] The existing technical solution is to determine the best matching parameters by scanning one by one. It will take a long time to switch over the entire range, especially when the amount of change in the capacitance and inductance of the capacitor increases, the system search time wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
CPCH04L25/0278
Inventor 孙长景
Owner YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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