WO2014161356A1 - 一种降低sar的方法、移动终端和计算机存储介质 - Google Patents
一种降低sar的方法、移动终端和计算机存储介质 Download PDFInfo
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- WO2014161356A1 WO2014161356A1 PCT/CN2013/090258 CN2013090258W WO2014161356A1 WO 2014161356 A1 WO2014161356 A1 WO 2014161356A1 CN 2013090258 W CN2013090258 W CN 2013090258W WO 2014161356 A1 WO2014161356 A1 WO 2014161356A1
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- Prior art keywords
- antenna
- mobile terminal
- communication
- radiation power
- external radiation
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
- H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to mobile terminal technologies, and in particular, to a method for reducing electromagnetic energy absorption ratio (SAR) and a mobile terminal and a computer storage medium.
- SAR electromagnetic energy absorption ratio
- SAR is usually used to express the unit mass of human tissue and the electromagnetic radiation energy absorbed per unit time.
- the unit of SAR is watts/kg.
- Many countries have established and standardized safety standards for human body exposure to electromagnetic waves based on SAR.
- the damage caused to the human body radiation energy is particularly obvious at this time. Therefore, how to reduce the SAR of the mobile terminal communication is becoming more and more popular among manufacturers. And the attention of the majority of users. Summary of the invention
- embodiments of the present invention are expected to provide a method for reducing SAR, a mobile terminal, and a computer storage medium, which can reduce the SAR of the mobile terminal during communication and reduce the electromagnetic radiation of the mobile terminal to the human body.
- An embodiment of the present invention provides a method for reducing an electromagnetic wave energy absorption ratio of a mobile terminal, where at least two antennas are disposed in the mobile terminal, and the method includes:
- the controlling, by the external radiated power, the mobile terminal to communicate by using the first antenna or the second antenna includes:
- the current radio frequency path is switched to the second antenna to communicate using the second antenna, The first antenna is turned off.
- the method further includes: placing the first antenna and the second antenna diagonally in a mobile terminal;
- the first antenna is a primary antenna
- the second antenna is an auxiliary antenna
- the method further includes:
- the external radiated power of the second antenna in the communication process of the mobile terminal is detected in real time; and the mobile terminal controls the mobile terminal to communicate using the second antenna or the first antenna according to the detected external radiated power of the second antenna.
- the controlling, by the external radiated power of the second antenna, the mobile terminal to communicate by using the second antenna or the first antenna includes:
- the embodiment of the present invention further provides a mobile terminal, where at least two antennas are disposed in the mobile terminal, where the mobile terminal includes a first detecting unit and a communication unit;
- the first detecting unit is configured to detect, in real time, the first day of the communication process of the mobile terminal The external radiated power of the line;
- the communication unit is configured to control, according to the detected external radiated power of the first antenna, the mobile terminal to communicate by using the first antenna or the second antenna.
- the mobile terminal further includes a radio frequency circuit control unit and an antenna selection unit;
- the radio frequency circuit control unit is configured to: when the currently detected external radiated power of the first antenna is greater than a set first threshold, to maintain communication using the first antenna; When the external radiation power detected by the unit is less than or equal to the first threshold value and continues for a set duration, it is determined that the second antenna is used for communication;
- the antenna selection unit is configured to switch the current radio frequency path to the second antenna and use the second antenna to communicate when the radio frequency circuit control unit determines to use the second antenna for communication, to close the first antenna .
- the first antenna and the second antenna are diagonally placed in the mobile terminal;
- the first antenna is a primary antenna
- the second antenna is an auxiliary antenna
- the mobile terminal further includes a second detecting unit configured to detect an external radiated power of the second antenna in the mobile terminal communication process in real time;
- the communication unit is further configured to control, according to the detected external radiated power of the second antenna, the mobile terminal to communicate by using the second antenna or the first antenna.
- the radio frequency circuit control unit is further configured to: when determining that the externally radiated power of the second antenna that is currently detected is greater than a set second threshold, maintaining communication using the second antenna; When the external radiation power detected by the second detecting unit is less than or equal to the second threshold value and continues for a set duration, it is determined that the first antenna is used for communication;
- the antenna selection unit is further configured to switch the current radio frequency path to the first antenna and use the first antenna when the radio frequency circuit control unit determines to use the first antenna for communication Communication is performed to close the second antenna.
- the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores a computer program, and the computer program is used to execute the method for reducing SAR as described above.
- the method for reducing SAR, the mobile terminal, and the computer storage medium provided by the embodiment of the present invention, where at least two antennas are disposed in the mobile terminal, the first antenna is a main antenna, and the second antenna is an auxiliary antenna, in the mobile terminal.
- the first antenna is placed diagonally with the second antenna; the external radiated power of the first antenna in the communication process of the mobile terminal is detected in real time; and the mobile terminal is controlled according to the detected external radiated power of the first antenna Communication is performed using the first antenna or the second antenna.
- the technical solution in the embodiment of the present invention can detect the external radiated power of the radio frequency path antenna in real time during the communication process of the mobile terminal, and switch the distance of the radio frequency path after detecting that the first antenna is close to the human body for a certain period of time.
- the second antenna farther away from the first antenna, that is, the antenna farthest from the human body, thereby reducing the electromagnetic distance of the mobile terminal to the human body by increasing the physical distance between the transmitting antenna and the human body, so that the mobile terminal is to the human body. Electromagnetic radiation hazards have been minimized.
- FIG. 1 is a schematic flowchart of an implementation process of a method for reducing a mobile terminal SAR according to an embodiment of the present invention
- FIG. 2 is a schematic diagram of a layout of a primary antenna and an auxiliary antenna according to an embodiment of the present invention
- FIG. 3 is a schematic flowchart of a process for performing antenna selection during communication by a mobile terminal according to an embodiment of the present invention
- FIG. 4 is a schematic structural diagram of a structure of a mobile terminal according to an embodiment of the present invention. detailed description
- the existing large-scale air performance test (OTA, Over The Air) test data shows: When the mobile terminal is close to the human hand, the total radiated power (TRP, Total Radiated Power) is significantly reduced by about 3 ⁇ 5dBm; when the mobile terminal is close to the human head plus the human hand At the time, the TRP is significantly reduced by about 5 ⁇ 8dBm. That is to say, when the mobile terminal approaches the human body, the external radiated power of the mobile terminal is significantly reduced due to the change of the external impedance of the antenna.
- TRP Total Radiated Power
- SAR P/( Xa+Xb ) 2; where P is the mobile terminal transmit power, Xa is the distance from the mobile terminal to the edge of the human body part, and Xb is the SAR maximum point to the human body part of the human body part. The distance from the edge.
- the SAR value can be significantly reduced.
- FIG. 1 is a schematic diagram of an implementation process of a method for reducing a SAR of a mobile terminal according to an embodiment of the present invention. As shown in FIG. 1, the method mainly includes the following steps:
- Step 101 The external radiated power of the first antenna in the communication process of the mobile terminal is detected in real time; specifically, the method further includes:
- Figure 2 shows the layout of the main antenna and the auxiliary antenna.
- Step 102 Control, according to the external radiated power, the mobile terminal to communicate by using the first antenna or the second antenna.
- the controlling, by the external radiant power, the mobile terminal to communicate by using the first antenna or the second antenna includes:
- the current radio frequency path is switched to the second antenna to communicate using the second antenna, The first antenna is turned off.
- the method further includes:
- the external radiated power of the second antenna in the communication process of the mobile terminal is detected in real time; and the mobile terminal controls the mobile terminal to communicate using the second antenna or the first antenna according to the detected external radiated power of the second antenna.
- controlling, by the external radiated power of the second antenna, the mobile terminal to communicate by using the second antenna or the first antenna includes:
- the first threshold value and the second threshold value may all be set according to an OTA data standard; and the values of the first threshold value and the second threshold value may be the same or different.
- the embodiment of the present invention detects the external radiated power of the working antenna in real time, determines whether the mobile terminal is close to the caller by changing the external radiated power, and further determines whether the working antenna is to be switched.
- the radio frequency path is switched from the first antenna to the second antenna that is far away from the physical distance of the caller, thereby reducing the electromagnetic radiation of the antenna to the caller and reducing The electromagnetic wave caused by the mobile terminal to the caller.
- FIG. 3 is a schematic flowchart of a process for performing antenna selection by a mobile terminal during communication according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:
- Step 301 The mobile terminal starts communication
- the default first antenna is a communication antenna.
- Step 302 Detect whether the external radiated power of the first antenna is abnormal, and if yes, go to step 303; otherwise, go to step 307;
- the external radiated power of the first antenna is less than or equal to the set first threshold, it is determined that the external radiated power of the first antenna is abnormal.
- the external radiated power of the first antenna is greater than the set first threshold, it is determined that the mobile terminal's radiation to the caller is negligible; at this time, the communication antenna does not need to be switched.
- the first threshold is set according to actual conditions.
- Step 303 periodically detecting the external radiated power of the first antenna, and then performing step 304;
- Step 304 determining whether the external radiated power of the first antenna is abnormal for a long time, and if yes, performing step 305; otherwise, performing step 307;
- Step 305 determining that the mobile terminal contacts the caller for a long time, switching the transmission path to the second antenna (first antenna), and then performing step 306;
- the external radiated power of the mobile terminal is still lower than the set first threshold, that is, lower than the set normal value, it is determined that the first antenna of the mobile terminal is in the working state.
- the time is close to the caller, and the transmission path is switched from the first antenna to the second antenna that is physically far from the caller.
- Step 306 Detect whether the external radiated power of the second antenna (the first antenna) is normal for a long time, if normal, go to step 307; if not, go to step 305; For example, when the mobile terminal uses the second antenna to communicate, the user's call posture in a certain period of time does not change, and thus the external radiated power of the second antenna is always normal; but when the user changes the call posture, for example, the mobile terminal When moving up or down, the external radiated power of the second antenna may be lower than the set second threshold, that is, lower than the set normal value.
- Step 307 Communicate using the second antenna (first antenna).
- the second antenna (the first antenna) continues to be used for communication; when the external radiated power of the second antenna (the first antenna) is abnormal, The transmission path is switched to the first antenna (second antenna) for communication.
- the mobile terminal includes a first detecting unit 41 and a communication unit 42.
- the first detecting unit 41 is configured to detect an external radiated power of the first antenna in the communication process of the mobile terminal in real time;
- the communication unit 42 is configured to control the mobile terminal to communicate using the first antenna or the second antenna according to the detected external radiated power of the first antenna.
- the first antenna and the second antenna are diagonally placed in the mobile terminal
- the first antenna is a primary antenna
- the second antenna is an auxiliary antenna
- the mobile terminal further includes a radio frequency circuit control unit 43 and an antenna selection unit 44;
- the radio frequency circuit control unit 43 is configured to: when the currently detected external radiated power of the first antenna is greater than a set first threshold, to maintain communication using the first antenna; When the external radiated power detected by the detecting unit 41 is less than or equal to the first threshold value and continues for a set duration, it is determined that the second antenna is used for communication;
- the antenna selection unit 44 is configured to switch the current radio frequency path to the second antenna and use the second antenna when the radio frequency circuit control unit determines to use the second antenna for communication Communication is performed to close the first antenna.
- the mobile terminal further includes a second detecting unit 45 configured to detect, in real time, the external radiated power of the second antenna in the communication process of the mobile terminal;
- the communication unit 42 is further configured to control the mobile terminal to communicate using the second antenna or the first antenna according to the detected external radiated power of the second antenna.
- the radio frequency circuit control unit 43 is further configured to: when determining that the externally radiated power of the second antenna that is currently detected is greater than a set second threshold, maintaining communication using the second antenna; When the external radiation power detected by the second detecting unit 45 is less than or equal to the second threshold value and continues for a set duration, it is determined that the first antenna is used for communication;
- the antenna selection unit 44 is further configured to: when the radio frequency circuit control unit 43 determines to use the first antenna for communication, switch the current radio frequency path to the first antenna to communicate using the first antenna, and close the Second antenna.
- the first detecting unit 41, the communication unit 42, the second detecting unit 45, the radio frequency circuit control unit 43, and the antenna selecting unit 44 may each be an application processor AP (AP, Application Processor) in the mobile terminal, a central processing unit (CPU) , Central Processing Unit), Digital Signal Processor (DSP) or Field Programmable Gate Array (FPGA).
- AP Application Processor
- CPU central processing unit
- DSP Digital Signal Processor
- FPGA Field Programmable Gate Array
- the embodiment of the present invention further describes a computer storage medium, wherein the computer storage medium stores a computer program, and the computer program is used to execute the method for reducing the mobile terminal S AR shown in FIG. 1 in the embodiment of the present invention.
- At least two antennas are disposed in the mobile terminal, the first antenna is a main antenna, the second antenna is an auxiliary antenna, and the first antenna and the second antenna are used in a mobile terminal.
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Abstract
本发明公开了一种降低移动终端电磁波能量吸收比SAR的方法,所述方法包括:在移动终端中设置至少两根天线,所述第一天线为主天线,所述第二天线为辅助天线,在移动终端中将所述第一天线与所述第二天线呈对角线放置;实时检测移动终端通信过程中第一天线的对外辐射功率;根据所述对外辐射功率控制移动终端使用所述第一天线或第二天线进行通信。本发明还同时公开了一种移动终端和计算机存储介质。
Description
一种降低 SAR的方法、 移动终端和计算积存储介庸 技术领域
本发明涉及移动终端技术, 尤其涉及一种降低电磁波能量吸收比 ( SAR, Specific Absorption Rate ) 的方法及移动终端和计算机存储介质。 背景技术
随着移动终端的普及以及人均使用移动终端时间的增加, 移动终端辐 射出的电磁波对人体的影响, 越来越受到人们的关注。
目前, 通常用 SAR表示人体组织单位质量、 单位时间吸收的电磁辐射 能量, SAR的单位为瓦 /千克, 多个国家已基于 SAR建立并规范了关于人 体暴露于电磁波的安全标准。 然而, 在使用移动终端进行长时间通信过程 中, 由于移动终端距离人体近, 此时对人体辐射能量造成的危害尤为明显, 因此, 如何降低移动终端通信时的 SAR, 越来越备受制造商和广大使用者 的关注。 发明内容
有鉴于此, 本发明实施例期望提供一种降低 SAR的方法、 移动终端和 计算机存储介质, 能降低移动终端在通信时的 SAR, 减少移动终端对人体 的电磁辐射。
为达到上述目的, 本发明实施例的技术方案是这样实现的:
本发明实施例提供了一种降低移动终端电磁波能量吸收比的方法, 在 移动终端中设置至少两根天线, 所述方法包括:
实时检测移动终端通信过程中第一天线的对外辐射功率;
根据所述对外辐射功率控制移动终端使用所述第一天线或第二天线进
行通信。
优选地, 所述根据所述对外辐射功率控制移动终端使用所述第一天线 或第二天线进行通信, 包括:
确定当前检测到的所述第一天线的对外辐射功率大于设定的第一门限 值时, 保持使用所述第一天线进行通信;
确定当前检测到的所述第一天线的对外辐射功率小于等于所述第一门 限值且持续设定时长时, 将当前的射频通路切换至所述第二天线而使用第 二天线进行通信, 关闭所述第一天线。
优选地, 所述方法还包括: 在移动终端中将所述第一天线与所述第二 天线呈对角线放置;
其中, 所述第一天线为主天线, 所述第二天线为辅助天线。
优选地, 所述使用第二天线进行通信时, 所述方法还包括:
实时检测移动终端通信过程中所述第二天线的对外辐射功率; 根据检测到的所述第二天线的对外辐射功率控制移动终端使用所述第 二天线或第一天线进行通信。
优选地, 所述根据检测到的所述第二天线的对外辐射功率控制移动终 端使用所述第二天线或第一天线进行通信, 包括:
确定当前检测到的所述第二天线的对外辐射功率大于设定的第二门限 值时, 保持使用所述第二天线进行通信;
确定当前检测到的所述第二天线的对外辐射功率小于等于所述第二门 限值、 且持续设定时长时, 将当前的射频通路切换至所述第一天线而使用 第一天线进行通信, 关闭所述第二天线。
本发明实施例还提供了一种移动终端, 在移动终端中设置至少两根天 线, 所述移动终端包括第一检测单元、 通信单元; 其中,
所述第一检测单元, 配置为实时检测所述移动终端通信过程中第一天
线的对外辐射功率;
所述通信单元, 配置为根据检测到的所述第一天线的对外辐射功率控 制移动终端使用所述第一天线或第二天线进行通信。
优选地, 所述移动终端还包括射频电路控制单元和天线选择单元; 其 中,
所述射频电路控制单元, 配置为确定当前检测到的所述第一天线的对 外辐射功率大于设定的第一门限值时, 保持使用所述第一天线进行通信; 在所述第一检测单元检测到的对外辐射功率小于等于所述第一门限值、 且 持续设定时长时, 判定使用第二天线进行通信;
所述天线选择单元, 配置为在所述射频电路控制单元判定使用第二天 线进行通信时, 将当前的射频通路切换至所述第二天线而使用第二天线进 行通信, 关闭所述第一天线。
优选地, 所述第一天线与所述第二天线在移动终端中呈对角线放置; 其中,
所述第一天线为主天线, 所述第二天线为辅助天线。
优选地, 所述移动终端还包括第二检测单元, 配置为实时检测移动终 端通信过程中所述第二天线的对外辐射功率;
相应的, 所述通信单元, 还配置为根据检测到的所述第二天线的对外 辐射功率控制移动终端使用所述第二天线或第一天线进行通信。
优选地, 所述射频电路控制单元, 还配置为确定当前检测到的所述第 二天线的对外辐射功率大于设定的第二门限值时, 保持使用所述第二天线 进行通信; 在所述第二检测单元检测到的对外辐射功率小于等于所述第二 门限值、 且持续设定时长时, 判定使用第一天线进行通信;
所述天线选择单元, 还配置为在所述射频电路控制单元判定使用第一 天线进行通信时, 将当前的射频通路切换至所述第一天线而使用第一天线
进行通信, 关闭所述第二天线。
本发明实施例还提供了一种计算机存储介质, 所述计算机存储介质中 存储有计算机程序,所述计算机程序用于执行以上所述的降低 SAR的方法。
本发明实施例所提供的降低 SAR的方法、移动终端和计算机存储介质, 在移动终端中设置至少两根天线, 所述第一天线为主天线, 所述第二天线 为辅助天线, 在移动终端中将所述第一天线与所述第二天线呈对角线放置; 实时检测移动终端通信过程中第一天线的对外辐射功率; 根据检测到的所 述第一天线的对外辐射功率控制移动终端使用所述第一天线或第二天线进 行通信。 如此, 降低了移动终端在通信时的 SAR, 减少了移动终端对人体 的电磁辐射。 具体地, 本发明实施例所述技术方案能够在移动终端进行通 信过程中, 实时检测射频通路天线的对外辐射功率, 当检测到第一天线接 近人体时间超过一定时间后, 将射频通路切换置距离第一天线较远的第二 天线上, 即离人体物理距离最远的天线上, 从而通过增大发射天线与人体 的物理距离, 减少了移动终端对人体的电磁辐射, 使移动终端对人体的电 磁辐射危害降到了最低。 附图说明
图 1 为本发明实施例提供的降低移动终端 SAR方法的实现流程示意 图;
图 2为本发明实施例提供的主天线与辅助天线的布局示意图; 图 3 为本发明实施例提供的移动终端在通信时进行天线选择的处理流 程示意图;
图 4为本发明实施例提供的移动终端的组成结构示意图。 具体实施方式
以下结合附图对本发明的优选实施例进行详细说明, 应当理解, 以下
所说明的优选实施例仅用于说明和解释本发明, 并不用于限定本发明。 现有的大量空中性能测试(OTA, Over The Air ) 测试数据显示: 当移 动终端靠近人手时, 总辐射功率(TRP, Total Radiated Power ) 明显地降低 3~5dBm左右;当移动终端靠近人头加人手时, TRP明显降低 5~8dBm左右。 也就是说, 当移动终端接近人体时, 由于天线外部阻抗发生了变化, 移动 终端对外辐射功率会明显降低。
因此, 可通过判断对外辐射功率的变化情况来判断移动终端是否接近 人体。
目前, SAR的计算公式为: SAR=P/ ( Xa+Xb ) 2; 其中, P为移动终端 发射功率, Xa为移动终端到人体部位边缘的距离, Xb为人体部位中 SAR 最大点到人体部位边缘的距离。
从上述公式中可以看出, 当移动终端的发射功率一定时, 若增大人体 与移动终端的物理距离, 人体对辐射的电磁波能量吸收比 SAR值将呈平方 关系递减。
可见,通过增加射频发射天线与人体之间的距离,能够显著地降低 SAR 值。
图 1 为本发明实施例提供的降低移动终端 SAR方法的实现流程示意 图, 如图 1所示, 该方法主要包括以下步骤:
步骤 101 : 实时检测移动终端通信过程中第一天线的对外辐射功率; 具体地, 所述方法还包括:
在移动终端中设置至少两根天线, 其中, 所述第一天线为主天线, 所 述第二天线为辅助天线; 将所述第一天线与所述第二天线在移动终端中呈 对角线放置, 图 2示出了主天线与辅助天线的布局示意图。
步骤 102:根据所述对外辐射功率控制移动终端使用所述第一天线或第 二天线进行通信。
具体地, 所述根据所述对外辐射功率控制移动终端使用所述第一天线 或第二天线进行通信, 包括:
确定当前检测到的所述第一天线的对外辐射功率大于设定的第一门限 值时, 保持使用所述第一天线进行通信;
确定当前检测到的所述第一天线的对外辐射功率小于等于所述第一门 限值且持续设定时长时, 将当前的射频通路切换至所述第二天线而使用第 二天线进行通信, 关闭所述第一天线。
这里, 使用第二天线进行通信时, 所述方法还包括:
实时检测移动终端通信过程中所述第二天线的对外辐射功率; 根据检测到的所述第二天线的对外辐射功率控制移动终端使用所述第 二天线或第一天线进行通信。
具体地, 所述根据检测到的所述第二天线的对外辐射功率控制移动终 端使用所述第二天线或第一天线进行通信, 包括:
确定当前检测到的所述第二天线的对外辐射功率大于设定的第二门限 值时, 保持使用所述第二天线进行通信;
确定当前检测到的所述第二天线的对外辐射功率小于等于所述第二门 限值、 且持续设定时长时, 将当前的射频通路切换至所述第一天线而使用 第一天线进行通信, 关闭所述第二天线。
这里, 所述第一门限值、 以及第二门限值均可根据 OTA数据标准来设 定; 并且, 第一门限值与第二门限值的值可以相同, 也可以不同。
本发明实施例在移动终端通信过程中, 实时检测工作天线的对外辐射 功率, 通过对外辐射功率的变化情况判断移动终端是否靠近了通话者, 进 而判定是否要进行工作天线的切换。
比如, 当检测到第一天线的对外辐射功率突然低于设定的第一门限值 时, 则判定第一天线接近通话者, 而一段时间后, 所述第一天线的对外辐
射功率依旧处于低于设定的第一门限值时, 将射频通路从第一天线切换到 离通话者物理距离较远的第二天线上, 从而减少了天线对通话者的电磁辐 射, 降低了移动终端对通话者带来的电磁波危害。
图 3 为本发明实施例提供的移动终端在通信时进行天线选择的处理流 程示意图, 如图 3所示, 该流程包括以下步骤:
步骤 301 : 移动终端开始通信;
这里, 在移动终端开始通信时, 默认第一天线为通信天线。
步骤 302: 检测第一天线的对外辐射功率是否异常, 如果是, 执行步骤 303 ; 否则, 执行步骤 307;
具体地, 当第一天线的对外辐射功率小于等于设定的第一门限值, 判 定为第一天线的对外辐射功率异常。
而当第一天线的对外辐射功率大于设定的第一门限值时, 判定移动终 端对通话者的辐射可以忽略; 此时, 不需要切换通信天线。
所述第一门限值根据实际情况来设置。
步骤 303 : 周期性检测第一天线的对外辐射功率, 然后执行步骤 304; 步骤 304:判断第一天线的对外辐射功率是否长时间处于异常,如果是, 执行步骤 305 ; 否则, 执行步骤 307;
步骤 305: 判定移动终端长时间接触通话者, 将发射通路切换到第二天 线(第一天线), 然后执行步骤 306;
这里, 实时检测一定时间后, 如果发现移动终端对外辐射功率依旧低 于设定的第一门限值, 即低于设定的正常值时, 则判定移动终端的处于工 作状态的第一天线长时间靠近通话者, 将发射通路从第一天线切换到离通 话者物理距离较远的第二天线上。
步骤 306:检测第二天线(第一天线)的对外辐射功率是否长时间正常, 如果正常, 执行步骤 307; 如果不正常, 执行步骤 305;
举例来说, 移动终端使用第二天线进行通信时, 用户在某时间段内的 通话姿势不变, 进而使第二天线的对外辐射功率一直正常; 但当用户变换 通话姿势, 比如, 将移动终端上移或下移时, 可能导致第二天线的对外辐 射功率低于设定的第二门限值, 即低于设定的正常值。
步骤 307: 使用第二天线(第一天线)进行通信。
这里, 当第二天线 (第一天线) 的对外辐射功率一直正常时, 继续使 用第二天线 (第一天线)进行通信; 当第二天线 (第一天线) 的对外辐射 功率不正常时, 将发射通路切换到第一天线(第二天线)进行通信。
图 4为本发明实施例提供的移动终端的组成结构示意图, 如图 4所示, 所述移动终端包括第一检测单元 41和通信单元 42; 其中,
所述第一检测单元 41, 配置为实时检测所述移动终端通信过程中第一 天线的对外辐射功率;
所述通信单元 42, 配置为才艮据检测到的所述第一天线的对外辐射功率 控制移动终端使用所述第一天线或第二天线进行通信。
这里, 所述第一天线与所述第二天线在移动终端中呈对角线放置; 其 中,
所述第一天线为主天线, 所述第二天线为辅助天线。
具体地,所述移动终端还包括射频电路控制单元 43和天线选择单元 44; 其中,
所述射频电路控制单元 43, 配置为确定当前检测到的所述第一天线的 对外辐射功率大于设定的第一门限值时, 保持使用所述第一天线进行通信; 在所述第一检测单元 41检测到的对外辐射功率小于等于所述第一门限值、 且持续设定时长时, 判定使用第二天线进行通信;
所述天线选择单元 44, 配置为在所述射频电路控制单元判定使用第二 天线进行通信时, 将当前的射频通路切换至所述第二天线而使用第二天线
进行通信, 关闭所述第一天线。
具体地, 所述移动终端还包括第二检测单元 45, 配置为实时检测移动 终端通信过程中所述第二天线的对外辐射功率;
相应的, 所述通信单元 42, 还配置为根据检测到的所述第二天线的对 外辐射功率控制移动终端使用所述第二天线或第一天线进行通信。
具体地, 所述射频电路控制单元 43, 还配置为确定当前检测到的所述 第二天线的对外辐射功率大于设定的第二门限值时, 保持使用所述第二天 线进行通信; 在所述第二检测单元 45检测到的对外辐射功率小于等于所述 第二门限值、 且持续设定时长时, 判定使用第一天线进行通信;
所述天线选择单元 44,还配置为在所述射频电路控制单元 43判定使用 第一天线进行通信时, 将当前的射频通路切换至所述第一天线而使用第一 天线进行通信, 关闭所述第二天线。
本领域技术人员应当理解, 图 4 中所示的移动终端中的各处理单元的 实现功能可参照前述降低移动终端 SAR方法的相关描述而理解。 本领域技 术人员应当理解, 图 4所示的移动终端中各处理单元的功能可通过运行于 处理器上的程序而实现, 也可通过具体地逻辑电路而实现。
这里, 第一检测单元 41、 通信单元 42、 第二检测单元 45、 射频电路控 制单元 43和天线选择单元 44均可由移动终端中的应用处理器 AP ( AP, Application Processor ), 中央处理器 ( CPU, Central Processing Unit ), 数字 信号处理器(DSP, Digital Signal Processor )或可编程门阵列(FPGA, Field Programmable Gate Array ) 实现。
本发明实施例还记载一种计算机存储介质, 所述计算机存储介质中存 储有计算机程序, 所述计算机程序用于执行本发明实施例中图 1 所示的降 低移动终端 S AR的方法。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保
护范围。 凡按照本发明原理所作的修改, 都应当理解为落入本发明的保护 范围。 工业实用性
本发明实施例中, 在移动终端中设置至少两根天线, 所述第一天线为 主天线, 所述第二天线为辅助天线, 在移动终端中将所述第一天线与所述 第二天线呈对角线放置; 实时检测移动终端通信过程中第一天线的对外辐 射功率; 根据所述对外辐射功率控制移动终端使用所述第一天线或第二天 线进行通信, 如此, 降低了移动终端在通信时的 SAR, 从而也减少了移动 终端对人体的电磁辐射。
Claims
1、 一种降低移动终端电磁波能量吸收比的方法, 在移动终端中设置至 少两根天线, 所述方法包括:
实时检测移动终端通信过程中第一天线的对外辐射功率;
根据所述对外辐射功率控制移动终端使用所述第一天线或第二天线进 行通信。
2、 根据权利要求 1所述的方法, 其中, 所述根据所述对外辐射功率控 制移动终端使用所述第一天线或第二天线进行通信, 包括:
确定当前检测到的所述第一天线的对外辐射功率大于设定的第一门限 值时, 保持使用所述第一天线进行通信;
确定当前检测到的所述第一天线的对外辐射功率小于等于所述第一门 限值且持续设定时长时, 将当前的射频通路切换至所述第二天线而使用第 二天线进行通信, 关闭所述第一天线。
3、 根据权利要求 1 或 2 所述的方法, 其中, 所述方法还包括: 在移 动终端中将所述第一天线与所述第二天线呈对角线放置;
其中, 所述第一天线为主天线, 所述第二天线为辅助天线。
4、根据权利要求 2 所述的方法,其中,所述使用第二天线进行通信时, 所述方法还包括:
实时检测移动终端通信过程中所述第二天线的对外辐射功率; 根据检测到的所述第二天线的对外辐射功率控制移动终端使用所述第 二天线或第一天线进行通信。
5、 根据权利要求 4所述的方法, 其中, 所述根据检测到的所述第二天 线的对外辐射功率控制移动终端使用所述第二天线或第一天线进行通信, 包括:
确定当前检测到的所述第二天线的对外辐射功率大于设定的第二门限
值时, 保持使用所述第二天线进行通信;
确定当前检测到的所述第二天线的对外辐射功率小于等于所述第二门 限值、 且持续设定时长时, 将当前的射频通路切换至所述第一天线而使用 第一天线进行通信, 关闭所述第二天线。
6、 一种移动终端, 在所述移动终端中设置至少两根天线, 所述移动终 端还包括第一检测单元和通信单元; 其中,
所述第一检测单元, 配置为实时检测所述移动终端通信过程中第一天 线的对外辐射功率;
所述通信单元, 配置为根据检测到的所述第一天线的对外辐射功率控 制移动终端使用所述第一天线或第二天线进行通信。
7、 根据权利要求 6所述的移动终端, 其中, 所述移动终端还包括射频 电路控制单元和天线选择单元; 其中,
所述射频电路控制单元, 配置为确定当前检测到的所述第一天线的对 外辐射功率大于设定的第一门限值时, 保持使用所述第一天线进行通信; 在所述第一检测单元检测到的对外辐射功率小于等于所述第一门限值、 且 持续设定时长时, 判定使用第二天线进行通信;
所述天线选择单元, 配置为在所述射频电路控制单元判定使用第二天 线进行通信时, 将当前的射频通路切换至所述第二天线而使用第二天线进 行通信, 关闭所述第一天线。
8、 根据权利要求 6所述的移动终端, 其中, 所述第一天线与所述第二 天线在移动终端中呈对角线放置; 其中,
所述第一天线为主天线, 所述第二天线为辅助天线。
9、 根据权利要求 6 所述的移动终端, 其中, 所述移动终端还包括第二 检测单元, 配置为实时检测移动终端通信过程中所述第二天线的对外辐射 功率;
相应的, 所述通信单元, 还配置为根据检测到的所述第二天线的对外 辐射功率控制移动终端使用所述第二天线或第一天线进行通信。
10、 根据权利要求 9所述的移动终端, 其中, 所述射频电路控制单元, 还配置为确定当前检测到的所述第二天线的对外辐射功率大于设定的第二 门限值时, 保持使用所述第二天线进行通信; 在所述第二检测单元检测到 的对外辐射功率小于等于所述第二门限值、 且持续设定时长时, 判定使用 第一天线进行通信;
所述天线选择单元, 还配置为在所述射频电路控制单元判定使用第一 天线进行通信时, 将当前的射频通路切换至所述第一天线而使用第一天线 进行通信, 关闭所述第二天线。
11、 一种计算机存储介质, 所述计算机存储介质中存储有计算机可执 行指令, 所述计算机可执行指令用于执行权利要求 1至 5任一项所述的方 法。
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