WO2014183342A1 - Terminal and antenna layout method for reducing specific absorption rate - Google Patents

Terminal and antenna layout method for reducing specific absorption rate Download PDF

Info

Publication number
WO2014183342A1
WO2014183342A1 PCT/CN2013/081171 CN2013081171W WO2014183342A1 WO 2014183342 A1 WO2014183342 A1 WO 2014183342A1 CN 2013081171 W CN2013081171 W CN 2013081171W WO 2014183342 A1 WO2014183342 A1 WO 2014183342A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
shunt
main communication
communication antenna
main
Prior art date
Application number
PCT/CN2013/081171
Other languages
French (fr)
Chinese (zh)
Inventor
陈亚军
沈俊
程守刚
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2014183342A1 publication Critical patent/WO2014183342A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/245—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a terminal and antenna layout method for reducing an electromagnetic wave absorption ratio. Background technique
  • SAR Specific Absorption Rate
  • SAR is used to describe the electromagnetic wave energy absorption ratio of a mobile phone or a wireless product. It is defined as: In the external electromagnetic field, an inductive electromagnetic field is generated in the human body. Since all kinds of organs in the human body are electrical consumers, the electromagnetic field in the body will generate electric current, which will absorb and dissipate electromagnetic energy. SAR is the electromagnetic power absorbed or consumed by human tissue per unit mass, with the miniaturization of mobile terminals. The development trend of ultra-thinning, the size of the antenna is getting smaller and smaller, but its electrical performance needs to meet the requirements of omnidirectional total radiated power, omnidirectional sensitivity, specific absorption ratio, etc., and it is difficult to reduce the total radiated power. SAR value.
  • the present invention provides a method of reducing electromagnetic wave absorption ratio and antenna layout to reduce the SAR value of a communication device by adding a shunt antenna.
  • the embodiment of the invention provides a terminal for reducing the electromagnetic wave absorption ratio, comprising a circuit board and a main communication antenna disposed at one end of the circuit board, and further comprising a shunt antenna disposed at the same end of the circuit board as the main communication antenna, the main communication antenna and the shunt
  • the antennas are arranged opposite each other and are coupled back to each other.
  • the primary communication antenna is opposite in direction to the shunt antenna current.
  • the shunt antenna communicates as a functional antenna.
  • the shunt antenna is located in a hot spot of the electromagnetic wave absorption ratio SAR of the main communication antenna.
  • the shunt antenna and the main communication antenna resonate in an electromagnetic wave absorption ratio SAR hot spot region of the main communication antenna.
  • An embodiment of the present invention further provides an antenna layout method, including the following steps: A shunt antenna that is reversely coupled to the main communication antenna is disposed at one end of the circuit board where the main communication antenna is disposed; the shunt antenna is disposed opposite to the main communication antenna and has a current direction opposite.
  • the shunt antenna communicates as a functional antenna.
  • the primary shunt antenna is located in a hot spot of the electromagnetic wave absorption ratio SAR of the main communication antenna.
  • the shunt wire and the main antenna resonate in an electromagnetic wave absorption ratio SAR hot spot region of the main communication antenna.
  • the terminal and the antenna layout method for reducing the electromagnetic wave absorption ratio proposed by the embodiment of the present invention by providing a shunt antenna coupled with the reverse coupling in the vicinity of the main communication antenna, thereby weakening the magnetic field around the main communication antenna and reducing the field strength of the main communication antenna, The field strength is proportional to the SAR value.
  • the SAR value decreases, that is, by increasing the shunt antenna that is inversely coupled with the main communication antenna, the SAR value is reduced.
  • FIG. 1 is a schematic structural view of a preferred embodiment of a terminal for reducing electromagnetic wave absorption ratio according to the present invention.
  • the implementation, functional features, and advantages of the present invention will be further described with reference to the accompanying drawings.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
  • Fig. 1 there is shown a schematic structural view of a preferred embodiment of a terminal for reducing electromagnetic wave absorption ratio according to the present invention.
  • the terminal for reducing the electromagnetic wave absorption ratio proposed in the embodiment includes a circuit board 10 and a main communication antenna 20 disposed at one end of the circuit board 10, and further includes a shunt antenna 30 disposed at the same end of the circuit board 10 as the main communication antenna 20, and a main communication antenna 20 is disposed opposite to the shunt antenna 30 and coupled to each other.
  • the shunt antenna 30 is reversely coupled to the main communication antenna 20, weakens the magnetic field around the main communication antenna 20, and reduces the field strength around the main communication antenna 20.
  • the conductivity of the body, ⁇ is the density of the object being excited. It is shown that the SAR of the antenna is proportional to the field strength in the vicinity thereof, and when the field strength is decreased, the SAR value is decreased, and since the shunt antenna 30 opposite to the direction is increased in the vicinity of the main communication antenna 20, the vicinity of the main communication antenna 20 is reduced. The field strength further reduces the SAR value.
  • the terminal for reducing the electromagnetic wave absorption ratio proposed in the embodiment provides a shunt antenna 30 coupled to the reverse side of the main communication antenna 20, thereby weakening the magnetic field around the main communication antenna 20 and reducing the field strength of the main communication antenna 20, thereby making the terminal The field strength is proportional to the SAR value.
  • the SAR value decreases, that is, by increasing the shunt antenna 30 that is inversely coupled to the main communication antenna 20, the SAR value is lowered.
  • the main communication antenna 20 and the shunt antenna 30 have opposite current directions. Since the current direction of the main communication antenna 20 and the shunt antenna 30 are opposite, and the field strength near the antenna is related to the current on the antenna, the magnetic strengths near the main communication antenna 20 and the shunt antenna 30 can cancel each other, and the main communication antenna 20 is reduced.
  • the field strength is near the shunt antenna 30.
  • the preferred scheme is that the main communication antenna 20 and the shunt antenna 30 are arranged in parallel, and the coupling effect is the best.
  • the main communication antenna 20 and the shunt antenna 30 can be disposed at the same end of the circuit board 10, and the main communication antenna 20 is parallel to the end of the shunt antenna 30, so that the main communication antenna 20 and the shunt antenna 30 have opposite current directions. Since the current of the shunt antenna 30 and the main communication antenna 20 are opposite, that is, the shunt antenna 30 and the main communication antenna
  • the direction of the antenna can be changed by changing the feeding pin and the shorting pin, and the shunt antenna 30 and the main communication antenna 20 generate a reverse coupling effect to reduce the field near the main communication antenna 20. Strong, the field strength is proportional to the SAR, which further reduces the SAR value.
  • the shunt antenna 30 can communicate as a functional antenna.
  • the shunt antenna 30 can communicate as a functional antenna to implement additional functions of the communication terminal, such as GPRS, broadcast, etc., and enrich the functions of the communication terminal on the basis of reducing the SAR. Further, the shunt antenna 30 is located in the electromagnetic wave absorption ratio SAR hot spot area of the main communication antenna 20.
  • the relative distance between the shunt antenna 30 and the main communication antenna 20 is preferably less than 30 mm. Further, the shunt antenna 30 and the main communication antenna 20 resonate in the electromagnetic wave absorption ratio SAR hot spot region of the main communication antenna 20. When the main antenna SAR value is high, the main communication antenna 20 and the shunt antenna 30 resonate, which improves the coupling efficiency of the main communication antenna 20 and the shunt antenna 30, and further reduces the SAR value.
  • An embodiment of the present invention further provides an antenna layout method, including: A shunt antenna that is reversely coupled to the main communication antenna is disposed at one end of the circuit board where the main communication antenna is disposed; the shunt antenna is disposed opposite to the main communication antenna and the current direction is opposite. Since the current direction of the main communication antenna and the shunt antenna is opposite, and the field strength near the antenna is related to the current on the antenna, the field strengths near the main communication antenna and the shunt antenna can cancel each other, and the vicinity of the main communication antenna and the shunt antenna is reduced. Field strength.
  • the preferred scheme has the same current as the main communication antenna and the shunt antenna, and the coupling effect is the best.
  • the main communication antenna and the shunt antenna can be disposed at the same end of the circuit board, and the main communication antenna is parallel to the end of the shunt antenna, so that the main communication antenna and the shunt antenna have opposite current directions.
  • the conductivity of the body, ⁇ is the density of the object being excited. It shows that the SAR of the antenna is proportional to the field strength in the vicinity. When the field strength decreases, the SAR value decreases. Because the shunt antenna opposite to the direction of the main communication antenna is added, the field strength near the main communication antenna is reduced. , further reducing the SAR value.
  • the terminal for reducing the electromagnetic wave absorption ratio proposed in the embodiment provides a field-strength and SAR by reducing the magnetic field around the main communication antenna and reducing the field strength of the main communication antenna by providing a shunt antenna that is reversely coupled in the vicinity of the main communication antenna. The value is proportional.
  • the SAR value decreases, that is, by increasing the shunt antenna that is inversely coupled to the main communication antenna, the SAR value is reduced.
  • the shunt antenna is used as a functional antenna for communication, and the shunt antenna can be used as a functional antenna for communication, and an additional function of the communication terminal, such as GPRS, broadcast, etc., is realized, and the function of the communication terminal is enriched on the basis of reducing the SAR.
  • the main shunt antenna is located in the electromagnetic wave absorption ratio SAR hot spot area of the main communication antenna. Since the SAR value of the main communication antenna has a hot spot area, the SAR value in the area is large and the SAR value is better.
  • the relative distance between the shunt antenna and the main communication antenna is preferably less than 30 mm. Further, the shunt antenna and the main communication antenna resonate in an electromagnetic wave absorption ratio SAR hot spot region of the main communication antenna. When the SAR value of the main antenna is high, the main communication antenna and the shunt antenna resonate, which improves the coupling efficiency between the main communication antenna and the shunt antenna, and further reduces the SAR value.
  • the technical solution provided by the embodiments of the present invention can be applied to the field of wireless communications to reduce the SAR value.
  • it is applied to a wireless terminal, and the shunt antenna coupled with the reverse coupling is disposed in the vicinity of the main communication antenna, thereby weakening
  • the magnetic field around the main communication antenna reduces the field strength of the main communication antenna, so that the field strength is proportional to the SAR value.
  • the SAR value decreases, SP, by adding a shunt antenna that is inversely coupled to the main communication antenna. Reduce the SAR value.

Abstract

The present invention relates to a terminal and an antenna layout method for reducing a specific absorption rate. By disposing an offloading antenna which is near a main communications antenna and coupled to the main communications antenna in an opposite direction, a magnetic field around the main communications antenna is impaired, and a field strength of the main communications antenna is reduced, so that the field strength is directly proportional to an SAR value; when the field strength is reduced, the SAR value is reduced, that is, the SAR value is reduced by adding the offloading antenna coupled to the main communications antenna in an opposite direction.

Description

降低电磁波吸收比值的终端和天线布局方法 技术领域 本发明涉及通信技术领域， 尤其涉及一种降低电磁波吸收比值的终端和天线布局 方法。 背景技术  TECHNICAL FIELD The present invention relates to the field of communications technologies, and in particular, to a terminal and antenna layout method for reducing an electromagnetic wave absorption ratio. Background technique
SAR ( Specific Absorption Rate, 电磁波吸收比值） 用于描述手机或无线产品的之 电磁波能量吸收比值， 其定义为： 在外电磁场的作用下， 人体内将产生感应电磁场。 由于人体各种器官均为耗电介质， 因此体内电磁场将会产生电流， 导致吸收和耗散电 磁能量， SAR为单位质量的人体组织所吸收或消耗的电磁功率， 随着移动终端的微型 化和超薄化的发展趋势， 天线的体积越来越小， 但其电性能需要同时满足全向总辐射 功率、全向灵敏度、特定吸收比率等指标性要求，在保证总辐射功率时，很难降低 SAR 值。 发明内容 本发明提供了一种降低电磁波吸收比值和天线布局的方法， 以通过增加分流天线 降低通信设备的 SAR值。 本发明实施例提出一种降低电磁波吸收比值的终端， 包括电路板及设置在电路板 一端的主通信天线， 还包括与主通信天线设置在电路板同一端的分流天线， 所述主通 信天线与分流天线相对设置且相互反向耦合。 优选地， 所述主通信天线与分流天线电流方向相反。 优选地， 所述分流天线作为功能天线进行通信。 优选地， 所述分流天线位于所述主通信天线的电磁波吸收比值 SAR热点区域内。 优选地， 所述分流天线与所述主通信天线在所述主通信天线的电磁波吸收比值 SAR热点区域内谐振。 本发明实施例还提出一种天线布局方法， 包括如下步骤： 在电路板设置有主通信天线的一端设置与所述主通信天线相互反向耦合的分流天 线； 所述分流天线与所述主通信天线相对设置且电流方向相反。 优选地， 所述分流天线作为功能天线进行通信。 优选地， 所述主分流天线位于所述主通信天线的电磁波吸收比值 SAR热点区域 内。 优选地，所述分流电线与所述主天线在所述主通信天线的电磁波吸收比值 SAR热 点区域内谐振。 本发明实施例提出的降低电磁波吸收比值的终端和天线布局方法， 通过在主通信 天线的附近设置与其反向耦合的分流天线， 进而削弱主通信天线周围的磁场及降低主 通信天线的场强， 使得场强与 SAR值成正比， 当场强减小时， 则 SAR值减小， 即通 过增加与主通信天线反向耦合的分流天线， 降低 SAR值。 附图说明 图 1为本发明降低电磁波吸收比值的终端的优选实施例的结构示意图。 本发明目的的实现、 功能特点及优点将结合实施例， 参照附图做进一步说明。 具体实施方式 下面结合附图及具体实施例就本发明的技术方案做进一步的说明。 应当理解， 此 处所描述的具体实施例仅仅用以解释本发明， 并不用于限定本发明。 参照图 1， 图 1为本发明降低电磁波吸收比值的终端的优选实施例的结构示意图。 本实施例提出的降低电磁波吸收比值的终端， 包括电路板 10及设置在电路板 10 一端的主通信天线 20，还包括与主通信天线 20设置在电路板 10同一端的分流天线 30， 主通信天线 20与分流天线 30相对设置且相互反向耦合。 分流天线 30与主通信天线 20反向耦合， 削弱主通信天线 20周围的磁场， 降低主通信天线 20周围的场强。 而天线的 SAR为： SAR= E2 ,Ε为被激励物体在空间内的场强， σ为被激励物 SAR (Specific Absorption Rate) is used to describe the electromagnetic wave energy absorption ratio of a mobile phone or a wireless product. It is defined as: In the external electromagnetic field, an inductive electromagnetic field is generated in the human body. Since all kinds of organs in the human body are electrical consumers, the electromagnetic field in the body will generate electric current, which will absorb and dissipate electromagnetic energy. SAR is the electromagnetic power absorbed or consumed by human tissue per unit mass, with the miniaturization of mobile terminals. The development trend of ultra-thinning, the size of the antenna is getting smaller and smaller, but its electrical performance needs to meet the requirements of omnidirectional total radiated power, omnidirectional sensitivity, specific absorption ratio, etc., and it is difficult to reduce the total radiated power. SAR value. SUMMARY OF THE INVENTION The present invention provides a method of reducing electromagnetic wave absorption ratio and antenna layout to reduce the SAR value of a communication device by adding a shunt antenna. The embodiment of the invention provides a terminal for reducing the electromagnetic wave absorption ratio, comprising a circuit board and a main communication antenna disposed at one end of the circuit board, and further comprising a shunt antenna disposed at the same end of the circuit board as the main communication antenna, the main communication antenna and the shunt The antennas are arranged opposite each other and are coupled back to each other. Preferably, the primary communication antenna is opposite in direction to the shunt antenna current. Preferably, the shunt antenna communicates as a functional antenna. Preferably, the shunt antenna is located in a hot spot of the electromagnetic wave absorption ratio SAR of the main communication antenna. Preferably, the shunt antenna and the main communication antenna resonate in an electromagnetic wave absorption ratio SAR hot spot region of the main communication antenna. An embodiment of the present invention further provides an antenna layout method, including the following steps: A shunt antenna that is reversely coupled to the main communication antenna is disposed at one end of the circuit board where the main communication antenna is disposed; the shunt antenna is disposed opposite to the main communication antenna and has a current direction opposite. Preferably, the shunt antenna communicates as a functional antenna. Preferably, the primary shunt antenna is located in a hot spot of the electromagnetic wave absorption ratio SAR of the main communication antenna. Preferably, the shunt wire and the main antenna resonate in an electromagnetic wave absorption ratio SAR hot spot region of the main communication antenna. The terminal and the antenna layout method for reducing the electromagnetic wave absorption ratio proposed by the embodiment of the present invention, by providing a shunt antenna coupled with the reverse coupling in the vicinity of the main communication antenna, thereby weakening the magnetic field around the main communication antenna and reducing the field strength of the main communication antenna, The field strength is proportional to the SAR value. When the field strength decreases, the SAR value decreases, that is, by increasing the shunt antenna that is inversely coupled with the main communication antenna, the SAR value is reduced. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural view of a preferred embodiment of a terminal for reducing electromagnetic wave absorption ratio according to the present invention. The implementation, functional features, and advantages of the present invention will be further described with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Referring to Fig. 1, there is shown a schematic structural view of a preferred embodiment of a terminal for reducing electromagnetic wave absorption ratio according to the present invention. The terminal for reducing the electromagnetic wave absorption ratio proposed in the embodiment includes a circuit board 10 and a main communication antenna 20 disposed at one end of the circuit board 10, and further includes a shunt antenna 30 disposed at the same end of the circuit board 10 as the main communication antenna 20, and a main communication antenna 20 is disposed opposite to the shunt antenna 30 and coupled to each other. The shunt antenna 30 is reversely coupled to the main communication antenna 20, weakens the magnetic field around the main communication antenna 20, and reduces the field strength around the main communication antenna 20. The SAR of the antenna is: SAR= E 2 , where Ε is the field strength of the excited object in space, and σ is the excited object.
Ρ  Ρ
体的电导率， ρ为被激励物体的密度。 说明天线的 SAR与其附近的场强成正比， 在场强减小的时候 SAR值减小， 则由 于在主通信天线 20的附近增加与其走向相反的分流天线 30， 减小了主通信天线 20附 近的场强， 进一步减小 SAR值。 本实施例提出的降低电磁波吸收比值的终端，通过在主通信天线 20的附近设置与 其反向耦合的分流天线 30， 进而削弱主通信天线 20周围的磁场及降低主通信天线 20 的场强， 使得场强与 SAR值成正比， 当场强减小时， 则 SAR值减小， 即通过增加与 主通信天线 20反向耦合的分流天线 30， 降低 SAR值。 进一步地， 主通信天线 20与分流天线 30电流方向相反。 由于主通信天线 20与分流天线 30的电流方向相反， 且天线附近的场强与天线上 的电流有关， 则主通信天线 20与分流天线 30附近的磁强可相互抵消， 减小主通信天 线 20与分流天线 30附近的场强。 优选方案为主通信天线 20与分流天线 30的平行设 置， 耦合效果最好。可将主通信天线 20与分流天线 30设置在电路板 10的同一端， 且 主通信天线 20与分流天线 30的端部平行， 即可实现主通信天线 20与分流天线 30电 流方向相反。 由于分流天线 30与主通信天线 20的电流方向相反，即分流天线 30与主通信天线The conductivity of the body, ρ is the density of the object being excited. It is shown that the SAR of the antenna is proportional to the field strength in the vicinity thereof, and when the field strength is decreased, the SAR value is decreased, and since the shunt antenna 30 opposite to the direction is increased in the vicinity of the main communication antenna 20, the vicinity of the main communication antenna 20 is reduced. The field strength further reduces the SAR value. The terminal for reducing the electromagnetic wave absorption ratio proposed in the embodiment provides a shunt antenna 30 coupled to the reverse side of the main communication antenna 20, thereby weakening the magnetic field around the main communication antenna 20 and reducing the field strength of the main communication antenna 20, thereby making the terminal The field strength is proportional to the SAR value. When the field strength decreases, the SAR value decreases, that is, by increasing the shunt antenna 30 that is inversely coupled to the main communication antenna 20, the SAR value is lowered. Further, the main communication antenna 20 and the shunt antenna 30 have opposite current directions. Since the current direction of the main communication antenna 20 and the shunt antenna 30 are opposite, and the field strength near the antenna is related to the current on the antenna, the magnetic strengths near the main communication antenna 20 and the shunt antenna 30 can cancel each other, and the main communication antenna 20 is reduced. The field strength is near the shunt antenna 30. The preferred scheme is that the main communication antenna 20 and the shunt antenna 30 are arranged in parallel, and the coupling effect is the best. The main communication antenna 20 and the shunt antenna 30 can be disposed at the same end of the circuit board 10, and the main communication antenna 20 is parallel to the end of the shunt antenna 30, so that the main communication antenna 20 and the shunt antenna 30 have opposite current directions. Since the current of the shunt antenna 30 and the main communication antenna 20 are opposite, that is, the shunt antenna 30 and the main communication antenna
20 平行设置且走线方向相反， 可通过改变馈电引脚和短路引脚来改变天线的走线方 向， 分流天线 30与主通信天线 20产生反向耦合效应减小主通信天线 20附近的场强， 场强与 SAR之成正比， 则进一步减小 SAR值。 进一步地， 分流天线 30可作为功能天线进行通信。 分流天线 30可作为功能天线 进行通信， 实现通信终端的附加功能， 如 GPRS、 广播等， 在减小 SAR的基础上丰富 通信终端的功能。 进一步地，分流天线 30位于所述主通信天线 20的电磁波吸收比值 SAR热点区域 内。由于主通信天线 20的 SAR值有一个热点区域，在该区域内 SAR值较大降低 SAR 值的效果较好。 分流天线 30与主通信天线 20之间的相对距离优选为小于 30mm。 进一步地，分流天线 30与所述主通信天线 20在所述主通信天线 20的电磁波吸收 比值 SAR热点区域内谐振。 当主天线 SAR值较高时， 主通信天线 20与分流天线 30 产生谐振， 提高了主通信天线 20与分流天线 30的耦合效率， 进一步减小 SAR值。 本发明实施例还提出一种天线布局方法， 包括： 在电路板设置有主通信天线的一端设置与所述主通信天线相互反向耦合的分流天 线； 分流天线与主通信天线相对设置且电流方向相反。 由于主通信天线与分流天线的电流方向相反， 且天线附近的场强与天线上的电流 有关， 则主通信天线与分流天线附近的场强可相互抵消， 减小主通信天线与分流天线 附近的场强。 优选方案为主通信天线与分流天线的电流大小相同， 耦合效果最好。 可 将主通信天线与分流天线设置在电路板的同一端， 且主通信天线与分流天线的端部平 行， 即可实现主通信天线与分流天线电流方向相反。 而天线的 SAR为： SAR= E2 ,Ε为被激励物体在空间内的场强， σ为被激励物 20 Parallel setting and opposite routing directions, the direction of the antenna can be changed by changing the feeding pin and the shorting pin, and the shunt antenna 30 and the main communication antenna 20 generate a reverse coupling effect to reduce the field near the main communication antenna 20. Strong, the field strength is proportional to the SAR, which further reduces the SAR value. Further, the shunt antenna 30 can communicate as a functional antenna. The shunt antenna 30 can communicate as a functional antenna to implement additional functions of the communication terminal, such as GPRS, broadcast, etc., and enrich the functions of the communication terminal on the basis of reducing the SAR. Further, the shunt antenna 30 is located in the electromagnetic wave absorption ratio SAR hot spot area of the main communication antenna 20. Since the SAR value of the main communication antenna 20 has a hot spot area, the SAR value in the area has a large effect of lowering the SAR value. The relative distance between the shunt antenna 30 and the main communication antenna 20 is preferably less than 30 mm. Further, the shunt antenna 30 and the main communication antenna 20 resonate in the electromagnetic wave absorption ratio SAR hot spot region of the main communication antenna 20. When the main antenna SAR value is high, the main communication antenna 20 and the shunt antenna 30 resonate, which improves the coupling efficiency of the main communication antenna 20 and the shunt antenna 30, and further reduces the SAR value. An embodiment of the present invention further provides an antenna layout method, including: A shunt antenna that is reversely coupled to the main communication antenna is disposed at one end of the circuit board where the main communication antenna is disposed; the shunt antenna is disposed opposite to the main communication antenna and the current direction is opposite. Since the current direction of the main communication antenna and the shunt antenna is opposite, and the field strength near the antenna is related to the current on the antenna, the field strengths near the main communication antenna and the shunt antenna can cancel each other, and the vicinity of the main communication antenna and the shunt antenna is reduced. Field strength. The preferred scheme has the same current as the main communication antenna and the shunt antenna, and the coupling effect is the best. The main communication antenna and the shunt antenna can be disposed at the same end of the circuit board, and the main communication antenna is parallel to the end of the shunt antenna, so that the main communication antenna and the shunt antenna have opposite current directions. The SAR of the antenna is: SAR= E 2 , where Ε is the field strength of the excited object in space, and σ is the excited object.
Ρ  Ρ
体的电导率， ρ为被激励物体的密度。 说明天线的 SAR与其附近的场强成正比， 在场强减小的时候 SAR值减小， 则由 于在主通信天线的附近增加与其走向相反的分流天线，减小了主通信天线附近的场强， 进一步减小 SAR值。 本实施例提出的降低电磁波吸收比值的终端， 通过在主通信天线的附近设置与其 反向耦合的分流天线， 进而削弱主通信天线周围的磁场及降低主通信天线的场强， 使 得场强与 SAR值成正比， 当场强减小时， 则 SAR值减小， 即通过增加与主通信天线 反向耦合的分流天线， 降低 SAR值。 进一步地， 分流天线作为功能天线进行通信， 分流天线可作为功能天线进行通信， 实现通信终端的附加功能， 如 GPRS、 广播等， 在减小 SAR的基础上丰富通信终端的 功能。 进一步地， 主分流天线位于主通信天线的电磁波吸收比值 SAR热点区域内。 由于 主通信天线的 SAR值有一个热点区域，在该区域内 SAR值较大降低 SAR值的效果较 好。 分流天线与主通信天线之间的相对距离优选为小于 30mm。 进一步地， 分流天线与所述主通信天线在所述主通信天线的电磁波吸收比值 SAR 热点区域内谐振。 当主天线 SAR值较高时， 主通信天线与分流天线产生谐振， 提高了 主通信天线与分流天线的耦合效率， 进一步减小 SAR值。 以上所述仅为本发明的优选实施例， 并非因此限制本发明的专利范围， 凡是利用 本发明说明书及附图内容所作的等效结构变换， 或直接或间接运用在其他相关的技术 领域， 均同理包括在本发明的专利保护范围内。 工业实用性 本发明实施例所提供的技术方案可以应用在无线通信领域中以降低 SAR值， 例 如， 应用于无线终端中， 通过在主通信天线的附近设置与其反向耦合的分流天线， 从 而削弱主通信天线周围的磁场及降低主通信天线的场强， 使得场强与 SAR值成正比， 当场强减小时， 则 SAR值减小， SP， 通过增加与主通信天线反向耦合的分流天线， 降 低 SAR值。 The conductivity of the body, ρ is the density of the object being excited. It shows that the SAR of the antenna is proportional to the field strength in the vicinity. When the field strength decreases, the SAR value decreases. Because the shunt antenna opposite to the direction of the main communication antenna is added, the field strength near the main communication antenna is reduced. , further reducing the SAR value. The terminal for reducing the electromagnetic wave absorption ratio proposed in the embodiment provides a field-strength and SAR by reducing the magnetic field around the main communication antenna and reducing the field strength of the main communication antenna by providing a shunt antenna that is reversely coupled in the vicinity of the main communication antenna. The value is proportional. When the field strength decreases, the SAR value decreases, that is, by increasing the shunt antenna that is inversely coupled to the main communication antenna, the SAR value is reduced. Further, the shunt antenna is used as a functional antenna for communication, and the shunt antenna can be used as a functional antenna for communication, and an additional function of the communication terminal, such as GPRS, broadcast, etc., is realized, and the function of the communication terminal is enriched on the basis of reducing the SAR. Further, the main shunt antenna is located in the electromagnetic wave absorption ratio SAR hot spot area of the main communication antenna. Since the SAR value of the main communication antenna has a hot spot area, the SAR value in the area is large and the SAR value is better. The relative distance between the shunt antenna and the main communication antenna is preferably less than 30 mm. Further, the shunt antenna and the main communication antenna resonate in an electromagnetic wave absorption ratio SAR hot spot region of the main communication antenna. When the SAR value of the main antenna is high, the main communication antenna and the shunt antenna resonate, which improves the coupling efficiency between the main communication antenna and the shunt antenna, and further reduces the SAR value. The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structural changes made by the specification and the drawings of the present invention are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention. Industrial Applicability The technical solution provided by the embodiments of the present invention can be applied to the field of wireless communications to reduce the SAR value. For example, it is applied to a wireless terminal, and the shunt antenna coupled with the reverse coupling is disposed in the vicinity of the main communication antenna, thereby weakening The magnetic field around the main communication antenna reduces the field strength of the main communication antenna, so that the field strength is proportional to the SAR value. When the field strength decreases, the SAR value decreases, SP, by adding a shunt antenna that is inversely coupled to the main communication antenna. Reduce the SAR value.

Claims

权 利 要 求 书 、 一种降低电磁波吸收比值的终端， 包括电路板及设置在电路板一端的主通信天 线， 其中， 所述终端还包括与主通信天线设置在电路板同一端的分流天线， 所 述主通信天线与分流天线相对设置且相互反向耦合。 、 根据权利要求 1所述的终端，其中，所述主通信天线与分流天线电流方向相反。 、 根据权利要求 1或 2所述的装置，其中，所述分流天线作为功能天线进行通信。 、 根据权利要求 3所述的装置， 其中， 所述分流天线位于所述主通信天线的电磁 波吸收比值 SAR热点区域内。 、 根据权利要求 4所述的装置， 其中， 所述分流天线与所述主通信天线在所述主 通信天线的电磁波吸收比值 SAR热点区域内谐振。 、 一种天线布局方法， 包括： The present invention provides a terminal for reducing an electromagnetic wave absorption ratio, comprising a circuit board and a main communication antenna disposed at one end of the circuit board, wherein the terminal further includes a shunt antenna disposed at a same end of the circuit board as the main communication antenna, the main The communication antenna is disposed opposite to the shunt antenna and coupled to each other. The terminal of claim 1, wherein the primary communication antenna is opposite in direction to the shunt antenna current. The apparatus according to claim 1 or 2, wherein said shunt antenna communicates as a functional antenna. The apparatus according to claim 3, wherein the shunt antenna is located in a hot spot of the electromagnetic absorption ratio SAR of the main communication antenna. The apparatus according to claim 4, wherein said shunt antenna and said main communication antenna resonate in an electromagnetic wave absorption ratio SAR hot spot region of said main communication antenna. An antenna layout method, including:
在电路板设置有主通信天线的一端设置与所述主通信天线相互反向耦合的 分流天线；  Providing a shunt antenna that is oppositely coupled to the main communication antenna at one end of the circuit board provided with the main communication antenna;
所述分流天线与所述主通信天线相对设置且电流方向相反。 、 根据权利要求 6所述的方法， 其中， 所述分流天线作为功能天线进行通信。 、 根据权利要求 7所述的方法， 其中， 所述主分流天线位于所述主通信天线的电 磁波吸收比值 SAR热点区域内。 、 根据权利要求 8所述的方法， 其中， 所述分流电线与所述主天线在所述主通 ίΐ 天线的电磁波吸收比值 SAR热点区域内谐振。  The shunt antenna is disposed opposite to the main communication antenna and has a current direction opposite. The method according to claim 6, wherein the shunt antenna communicates as a functional antenna. The method according to claim 7, wherein the primary shunt antenna is located in a hot spot of the electromagnetic wave absorption ratio SAR of the main communication antenna. The method according to claim 8, wherein the shunt wire and the main antenna resonate in an electromagnetic wave absorption ratio SAR hot spot region of the main pass antenna.
PCT/CN2013/081171 2013-05-17 2013-08-09 Terminal and antenna layout method for reducing specific absorption rate WO2014183342A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310183150.6 2013-05-17
CN201310183150.6A CN104167590B (en) 2013-05-17 2013-05-17 Reduce the terminal and antenna arrangement method of electromagnetic wave absorption rate

Publications (1)

Publication Number Publication Date
WO2014183342A1 true WO2014183342A1 (en) 2014-11-20

Family

ID=51897618

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/081171 WO2014183342A1 (en) 2013-05-17 2013-08-09 Terminal and antenna layout method for reducing specific absorption rate

Country Status (2)

Country Link
CN (1) CN104167590B (en)
WO (1) WO2014183342A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105552532B (en) * 2016-01-27 2018-12-04 北京海杭通讯科技有限公司 A kind of antenna of low electromagnetic absorption ratio
CN112350047B (en) * 2019-08-06 2022-07-12 华为技术有限公司 Wearable equipment
CN112968285A (en) * 2021-02-02 2021-06-15 维沃移动通信有限公司 Electronic device
CN116613509A (en) * 2022-02-09 2023-08-18 Oppo广东移动通信有限公司 Antenna device and electronic equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012122116A1 (en) * 2011-03-04 2012-09-13 Qualcomm Incorporated Systems and methods for dynamic transmission power limit back-off for specific absorption rate compliance
CN102810126A (en) * 2012-07-18 2012-12-05 上海交通大学 Method for reducing specific absorption rate (SAR) of multiple input multiple output (MIMO)-user equipment (UE) and simulation system thereof
CN103001005A (en) * 2012-10-25 2013-03-27 中兴通讯股份有限公司 Device and mobile terminal for lowering specific absorption rate of electromagnetic radiation
CN103067038A (en) * 2013-01-05 2013-04-24 中兴通讯股份有限公司 Mobile terminal and method for reducing specific absorption rate

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738584B (en) * 2012-06-15 2016-03-02 中兴通讯股份有限公司 A kind of terminal antenna and forming method thereof reducing data card SAR value

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012122116A1 (en) * 2011-03-04 2012-09-13 Qualcomm Incorporated Systems and methods for dynamic transmission power limit back-off for specific absorption rate compliance
CN102810126A (en) * 2012-07-18 2012-12-05 上海交通大学 Method for reducing specific absorption rate (SAR) of multiple input multiple output (MIMO)-user equipment (UE) and simulation system thereof
CN103001005A (en) * 2012-10-25 2013-03-27 中兴通讯股份有限公司 Device and mobile terminal for lowering specific absorption rate of electromagnetic radiation
CN103067038A (en) * 2013-01-05 2013-04-24 中兴通讯股份有限公司 Mobile terminal and method for reducing specific absorption rate

Also Published As

Publication number Publication date
CN104167590B (en) 2019-07-12
CN104167590A (en) 2014-11-26

Similar Documents

Publication Publication Date Title
US7405707B2 (en) Composite antenna
US20220393360A1 (en) Electronic Device
WO2004001895A1 (en) Antenna for portable radio
CN105655701B (en) Antenna assembly and mobile terminal
CN105450797B (en) Cell phone rear cover
JP2012060626A (en) Communication terminal apparatus
JPWO2013161608A1 (en) Coil antenna and communication terminal device
JP2002151923A (en) Mobile terminal
JP2015106919A (en) Multifrequency antenna module
JPWO2014034587A1 (en) Antenna device and communication terminal device
WO2017006921A1 (en) Antenna apparatus and electronic device
WO2014183342A1 (en) Terminal and antenna layout method for reducing specific absorption rate
WO2012151903A1 (en) Multi-antenna mobile phone data card and method for reducing specific absorption rate
CN112864583B (en) Antenna device and electronic equipment
Chen et al. Low‐profile, small‐size, wireless wide area network handset antenna close integration with surrounding ground plane
JP3925420B2 (en) Portable radio
WO2015029235A1 (en) Antenna device
TWI404354B (en) Mobile communication device with low near-field radiation
CN101212496B (en) Metamaterial microstrip line based radiation-proof mobile phone enclosure
CN206301944U (en) Multi-input multi-output antenna system and mobile terminal
JP2016103834A (en) Antenna device
CN108432048A (en) A kind of slot antenna and terminal
JP2004120519A (en) Antenna for portable radio equipment
Miškovský et al. Evaluation of MIMO handset antennas with decorative metal elements, using characteristic modes
JP5885011B1 (en) Antenna device and communication device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13884724

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13884724

Country of ref document: EP

Kind code of ref document: A1