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an electronic device

A technology of electronic equipment and capacitors, applied in circuits, electrical components, antennas, etc., can solve problems such as false triggering of SARSensor

Active Publication Date: 2019-08-27
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the adjustable capacitance change in the antenna tuning circuit causes the SAR Sensor to be falsely triggered

Method used

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Embodiment Construction

[0031] In order to understand the characteristics and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present invention.

[0032] figure 1 It is a schematic diagram of the structure and composition of the electronic equipment of the embodiment of the present invention Figure 1 ,Such as figure 1 As shown, the electronic equipment includes:

[0033] A first antenna structure 11, the first antenna structure 11 comprising a first antenna body 111 and an antenna tuning circuit 112;

[0034] The second antenna structure 12, the second antenna structure 12 includes a second antenna body 121;

[0035] A radio frequency circuit 13, the radio frequency circuit 13 is connected to the first antenna s...

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Abstract

The invention discloses electronic equipment which comprises a first antenna structure, a second antenna structure, an RF circuit, an SAR sensor and a control circuit. The first antenna structure comprises a first antenna body and an antenna tuning circuit; the second antenna structure comprises a second antenna body; the RF circuit is connected with the first antenna structure, and outputs RF signals to the first antenna structure; the SAR sensor is connected with the second antenna structure, so that the second antenna structure is used to detect change of capacitors in a target range, and a first capacitor of the antenna tuning circuit is positioned beyond the target range; and the control circuit is connected with the SAR sensor to adjust the output power of the RF circuit according to a detection result of the SAR sensor.

Description

technical field [0001] The invention relates to antenna technology, in particular to an electronic device with a multifunctional antenna. Background technique [0002] Specific Absorption Ratio Sensor (SAR Sensor, Specific Absorption Ratio Sensor) is a device used in many electronic devices, such as mobile phones, tablet computers, etc. are equipped with SAR Sensors. The SAR Sensor senses whether the surrounding capacitance changes through the antenna, and then determines whether the human body is close to the electronic device. When the human body is close to the electronic device, the electronic device can be controlled to reduce the transmission power, so that the SAR value is reduced to reduce the radiation to the human body. [0003] In addition, since electronic devices support more and more frequency bands, one antenna cannot meet the performance requirements of all frequency bands, so an antenna tuning circuit is used to increase the bandwidth of the antenna. The a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/22H01Q1/24H01Q21/00H01Q1/50
Inventor 杨文博夏炎
Owner LENOVO (BEIJING) LTD
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