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Electromagnetic wave control method and device

A control method and electromagnetic wave technology, applied in circuits, electrical components, antennas, etc., can solve the problems of reducing transmit power and radio frequency performance, and achieve the effect of reducing transmit power, reducing SAR, and ensuring radio frequency performance.

Active Publication Date: 2019-11-19
LENOVO (BEIJING) LTD
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Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a method and device for electromagnetic wave control, which is used to solve the problem of the degradation of radio frequency performance due to the method of reducing the transmission power when controlling SAR in the prior art

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Embodiment Construction

[0056] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0057] It should be understood that various modifications may be made to the embodiments applied for herein. Accordingly, the above description should not be viewed as limiting, but only as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.

[0058] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the general description of the application given above and the detailed description of the embodiments given below, serve to explain the embodiments of the application. principle.

[0059] These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment given as non-limiting examp...

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Abstract

The invention discloses an electromagnetic wave control method and device. The method comprises: determining a phase adjustment mode of the radiation beam of each antenna element in an antenna array when it is detected that an object approaches the antenna array, in order that the phase of the radiation beam of each antenna elements is a target phase, wherein the phase adjustment mode includes performing phase adjustment and not performing phase adjustment; and superposing and combining the radiation beams of the antenna elements whose phases are the target phases in order to obtain a target electromagnetic wave in a predetermined direction. The method controls the direction of the radiation beam of each antenna element in the antenna array so as to control the direction of the superimposed combined electromagnetic wave, so that the direction of the combined electromagnetic wave is away from a human body, thereby reducing SAR without a decrease in transmitting power and ensuring RF performance so as to ensure signal quality.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an electromagnetic wave control method and device. Background technique [0002] Electronic devices such as mobile phones have transmitting antennas, which generate electromagnetic radiation when transmitting signals. SAR (Specific Absorption Rate, electromagnetic wave absorption ratio) is the electromagnetic wave energy absorption ratio of mobile phones or other electronic devices. It is defined as: under the action of an external electromagnetic field, an induced electromagnetic field will be generated in the human body. For safety reasons, the SAR value of electronic devices such as mobile phones cannot exceed the specified range of safety SAR. Therefore, when a human body or object is close to an electronic device such as a mobile phone, it is necessary to adjust the electromagnetic wave absorption ratio of the electronic device such as a mobile phone so that the elec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/36H01Q21/00
CPCH01Q3/36H01Q21/00
Inventor 霍彬冯伊平
Owner LENOVO (BEIJING) LTD
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