CN103872427B - Antenna structure - Google Patents
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
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- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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Abstract
Description
技术领域technical field
本发明有关一种天线，尤指一种低电磁波能量的特定吸收比率（SpecificAbsorptionRate，SAR）值的天线结构。The present invention relates to an antenna, in particular to an antenna structure with a specific absorption rate (Specific Absorption Rate, SAR) value of low electromagnetic wave energy.
背景技术Background technique
随着科技的不断提升，许多移动式电子装置相继产生，如现在市面上销售的平板电脑。由于平板电脑的体积轻薄短小，且携带方便，因此广泛被各行业及各单位购买和使用。With the continuous improvement of technology, many mobile electronic devices have been produced one after another, such as tablet computers currently on the market. Because the volume of the tablet computer is light, thin, small and easy to carry, it is widely purchased and used by various industries and units.
在产品要被相关单位采购时，该产品都必须经过严格的检验，在检验的项目中包含摔落、防震、高低温运作、电磁干扰（ElectroMagneticInterference，EMI）/电磁兼容（ElectroMagneticCompatibility,EMC）干扰等，在这些检验的项目中摔落测试要对该产品进行26个点线面的摔落测试。由于产品在进行摔落测试时，产品的壳体的角落处都是最脆弱的部位，因此有很多产品都无法通过摔落法规的检验，因此为了通过该法规的检验，业内人士常在该产品的壳体的内部角落增加补强的金属块或金属器件，在该壳体的内部角落上增加补强的金属块或金属器件后，可增加机器本身的结构强度，达到通过摔落规范的目的。When the product is to be purchased by the relevant unit, the product must go through strict inspection, including drop, shockproof, high and low temperature operation, electromagnetic interference (ElectroMagneticInterference, EMI) / electromagnetic compatibility (ElectroMagneticCompatibility, EMC) interference, etc. , In the drop test of these inspection items, 26 point-line-surface drop tests should be performed on the product. Since the corners of the product shell are the most vulnerable parts during the drop test, many products fail to pass the test of the drop regulations. Therefore, in order to pass the inspection of the regulations, people in the industry often Add reinforced metal blocks or metal devices to the inner corners of the housing, and add reinforced metal blocks or metal devices to the inner corners of the housing to increase the structural strength of the machine itself and achieve the purpose of passing the drop specification .
虽然，在产品的壳体的内部角落上增加补强的金属块或金属器件可通过摔落法规的检验，但是该金属块或金属器件会使天线SAR值提高，无法通过FCC（FederalCommunicationsCommission，美国联邦通信委员会）SAR法规的检测。Although adding a reinforced metal block or metal device to the inner corner of the product's housing can pass the test of the drop regulations, the metal block or metal device will increase the SAR value of the antenna and fail to pass the FCC (Federal Communications Commission, US Federal Communications Commission) detection of SAR regulations.
发明内容Contents of the invention
有鉴于此，本发明的主要目的在于解决上述缺点，本发明通过改变天线的辐射体的末端（开路端）的方向，不但使金属块具有原有的补强效果，同时还能够达到低SAR值的效果，进而降低天线的辐射对人体的伤害。In view of this, the main purpose of the present invention is to solve the above shortcomings. The present invention not only makes the metal block have the original reinforcing effect, but also can achieve low SAR value by changing the direction of the end (open end) of the radiator of the antenna. The effect, thereby reducing the radiation damage of the antenna to the human body.
为达到上述目的，本发明提供一种天线结构，该天线结构包括移动式电子装置及天线，所述移动式电子装置上具有壳体，该壳体内具有容置空间和至少一个金属块；所述天线安装于所述容置空间中，所述天线上具有辐射体，该辐射体上具有开路端及信号馈入点；其中，所述天线的所述开路端朝向所述金属块，且所述信号馈入点到所述金属块的电流路径为运用的通信频带的八分之一至二分之一波长。In order to achieve the above object, the present invention provides an antenna structure, the antenna structure includes a mobile electronic device and an antenna, the mobile electronic device has a housing, the housing has an accommodating space and at least one metal block; the The antenna is installed in the accommodating space, the antenna has a radiator, and the radiator has an open end and a signal feeding point; wherein, the open end of the antenna faces the metal block, and the The current path from the signal feeding point to the metal block is one-eighth to one-half wavelength of the used communication frequency band.
进一步地，所述容置空间上具有两个以上角落，所述金属块位于所述角落上。Further, the accommodating space has more than two corners, and the metal block is located on the corners.
进一步地，所述容置空间具有安装所述天线的安装区域。Further, the accommodating space has an installation area for installing the antenna.
进一步地，所述金属块位于所述天线旁边的所述角落上。Further, the metal block is located on the corner next to the antenna.
进一步地，所述辐射体由两个以上金属线段连接而成。Further, the radiator is formed by connecting more than two metal wire segments.
进一步地，所述辐射体还包含有末端，该末端为所述辐射体的所述开路端。Further, the radiator further includes an end, which is the open-circuit end of the radiator.
进一步地，所述辐射体还包含有前端。Further, the radiator also includes a front end.
进一步地，所述天线结构还包含有接地体，该接地体与所述辐射体的所述前端电性连接。Further, the antenna structure further includes a grounding body, and the grounding body is electrically connected to the front end of the radiator.
进一步地，所述信号馈入点到所述金属块的电流路径为运用的通信频带的四分之一波长。Further, the current path from the signal feeding point to the metal block is a quarter wavelength of the used communication frequency band.
与现有技术相比，本发明不但使金属块具有原有的补强效果，同时还能够达到低SAR值的效果，进而降低天线的辐射对人体的伤害。Compared with the prior art, the invention not only makes the metal block have the original reinforcing effect, but also can achieve the effect of low SAR value, thereby reducing the damage of the radiation of the antenna to the human body.
附图说明Description of drawings
图1为本发明的天线与移动式电子装置的组合示意图；FIG. 1 is a schematic diagram of the combination of the antenna of the present invention and a mobile electronic device;
图2为本发明的天线与移动式电子装置的组合主视示意图；2 is a schematic front view of the combination of the antenna and the mobile electronic device of the present invention;
图3为图2的局部放大示意图；Figure 3 is a partial enlarged schematic diagram of Figure 2;
图4为本发明的天线安装于移动式电子装置的电流路径示意图；4 is a schematic diagram of the current path of the antenna installed in the mobile electronic device of the present invention;
图5为本发明的天线的辐射体的末端（开路端）朝外（朝向金属块）及朝内（不朝向金属块）测量到的移动式电子装置上方（TOP）的SAR值的比较示意图；5 is a schematic diagram of the comparison of SAR values measured at the top (TOP) of the mobile electronic device when the end (open end) of the radiator of the antenna of the present invention faces outward (toward the metal block) and inward (not toward the metal block);
图6为本发明的天线的辐射体的末端（开路端）朝外（朝向金属块）及朝内（不朝向金属块）测量到的移动式电子装置背面（BACK）的SAR值的比较示意图。FIG. 6 is a comparison diagram of the SAR values of the back (BACK) of the mobile electronic device measured with the end (open end) of the radiator of the antenna facing outward (toward the metal block) and inward (not toward the metal block).
附图标记说明Explanation of reference signs
移动式电子装置1壳体11Mobile electronic device 1 housing 11
容置空间12安装区域121Accommodating space 12 installation area 121
角落122电路板13corner 122 circuit board 13
液晶显示器面板14边缘部15Edge portion 15 of liquid crystal display panel 14
金属块16天线2Metal Block 16 Antenna 2
辐射体21金属线段211Radiator 21 Metal wire segment 211
前端212末端213front end 212 end 213
信号馈入点214接地体22Signal feed point 214 ground body 22
电流路径3Current path 3
具体实施方式detailed description
有关本发明的技术内容及详细说明，将配合附图说明如下，然而所附附图仅作为说明用途，并非用于局限本发明。The technical content and detailed description of the present invention will be described below with the accompanying drawings, but the attached drawings are only for illustration purposes and are not intended to limit the present invention.
请参照图1，为本发明的天线与移动式电子装置的组合示意图。如图所示：本发明的低SAR值的天线结构包括：移动式电子装置1及天线2。Please refer to FIG. 1 , which is a schematic diagram of the combination of the antenna and the mobile electronic device of the present invention. As shown in the figure: the low SAR value antenna structure of the present invention includes: a mobile electronic device 1 and an antenna 2 .
该移动式电子装置1上具有壳体11，该壳体11内具有容置空间12，该容置空间12用以安装与该移动式电子装置1相关联的组件，如电路板13及液晶显示器面板14，或镜头（图中未示出），或其它零组件。当该电路板13及该液晶显示器面板14以堆叠的方式安装于该容置空间12时，该电路板13及该液晶显示器面板14与该壳体11的边缘部15形成安装区域121。另外，该容置空间12上具有两个以上角落122，具体的，该容置空间12上具有四个角落122，这些角落122上各具有金属块16（或该金属块16位于天线2旁边的角落上），该金属块16用来增强该壳体11的这些角落122的强度。在本实施例中，该移动式电子装置1为平板电脑或智能型手机。The mobile electronic device 1 is provided with a housing 11, and the housing 11 has an accommodating space 12 for installing components associated with the mobile electronic device 1, such as a circuit board 13 and a liquid crystal display. Panel 14, or lens (not shown in the figure), or other components. When the circuit board 13 and the LCD panel 14 are installed in the accommodating space 12 in a stacked manner, the circuit board 13 , the LCD panel 14 and the edge portion 15 of the casing 11 form a mounting area 121 . In addition, the accommodating space 12 has more than two corners 122, specifically, the accommodating space 12 has four corners 122, each of these corners 122 has a metal block 16 (or the metal block 16 is located next to the antenna 2 corners), the metal block 16 is used to enhance the strength of the corners 122 of the casing 11 . In this embodiment, the mobile electronic device 1 is a tablet computer or a smart phone.
该天线2安装于该安装区域121中，且位于右上方补强的金属块16的一侧。该天线2具有辐射体21及接地体22。该辐射体21由两个以上金属线段211连接而成。该辐射体21上具有前端212、末端213及信号馈入点214，该前端212与该接地体22电性连接，该末端213形成该天线2的开路端，该信号馈入点214与铜轴电缆线（图中未示出）中间的铜轴线电性连接，该接地体22与同轴电缆线的接地部电性连接后，再通过铜轴电缆线的接地部的另一端电性连接到移动式电子装置1的壳体11上而接地。在本图中，天线2的接地体22及两个以上金属线段211可依天线2的特性所需来增设或减少。The antenna 2 is installed in the installation area 121 and is located on the upper right side of the reinforced metal block 16 . The antenna 2 has a radiator 21 and a grounding body 22 . The radiator 21 is formed by connecting more than two metal wire segments 211 . The radiator 21 has a front end 212, an end 213 and a signal feeding point 214, the front end 212 is electrically connected to the grounding body 22, the end 213 forms the open end of the antenna 2, the signal feeding point 214 is connected to the copper shaft The copper axis in the middle of the cable (not shown in the figure) is electrically connected. After the grounding body 22 is electrically connected to the grounding part of the coaxial cable, it is then electrically connected to the The casing 11 of the mobile electronic device 1 is grounded. In this figure, the grounding body 22 and more than two metal wire segments 211 of the antenna 2 can be added or decreased according to the characteristics of the antenna 2 .
请参照图2及图3，分别为本发明的天线与移动式电子装置的组合主视示意图及图2的局部放大示意图。如图所示：当本发明的天线2安装于该壳体11内的安装区域121且与该右上方的金属块16相邻时，该天线2的接地体22与移动式电子装置1的壳体11连接（靠电气导通的方式连接，例如铜箔贴纸或是导电泡棉等），或连接到壳体11的液晶显示器面板14下方的金属或印刷电路板（Printedcircuitboard，PCB）接地处，或其它可接地之处。该天线2的辐射体21的末端213朝向该右上方的金属块16，该信号馈入点214至右上方的金属块16具有一定距离，该距离约为运用的通信频带的八分之一至二分之一波长的距离。Please refer to FIG. 2 and FIG. 3 , which are respectively a schematic front view of the combination of the antenna and the mobile electronic device of the present invention and a partially enlarged schematic diagram of FIG. 2 . As shown in the figure: when the antenna 2 of the present invention is installed in the installation area 121 in the housing 11 and adjacent to the upper right metal block 16, the grounding body 22 of the antenna 2 and the shell of the mobile electronic device 1 body 11 (connected by means of electrical conduction, such as copper foil stickers or conductive foam, etc.), or connected to the metal or printed circuit board (Printedcircuitboard, PCB) grounding under the liquid crystal display panel 14 of the housing 11, or other grounded locations. The end 213 of the radiator 21 of the antenna 2 faces the upper right metal block 16, and the signal feeding point 214 has a certain distance from the upper right metal block 16, which is about one-eighth of the communication frequency band to be used. distance of one-half wavelength.
当该天线2安装于该右上方的金属块16的一侧时，该天线2的辐射体21的末端213朝向该右上方的金属块16，该信号馈入点214至右上方的金属块16形成一个约为运用的通信频带的八分之一至二分之一波长的距离的安装位置关系，可运用到2G、3G及4G的通信频带【无线广域网（WirelessWideAreaNetwork,WWAN）、长期演进(LongTermEvolution,LTE)】的系统中，同时可以降低SAR值，进而降低天线2的辐射对人体的伤害。When the antenna 2 is installed on one side of the upper right metal block 16, the end 213 of the radiator 21 of the antenna 2 faces the upper right metal block 16, and the signal feeding point 214 reaches the upper right metal block 16 Form an installation location relationship about the distance of one-eighth to one-half wavelength of the communication frequency band used, and can be applied to the communication frequency bands of 2G, 3G and 4G [Wireless Wide Area Network (Wireless Wide Area Network, WWAN), Long Term Evolution (LongTerm Evolution) ,LTE)] system, at the same time can reduce the SAR value, thereby reducing the radiation of the antenna 2 to the human body.
请参照图4，为本发明的天线安装于移动式电子装置的电流路径示意图。如图所示：在本发明的天线2的接地体22、金属块16电性连接安装于移动式电子装置1的壳体11后，该天线2的开路端朝向金属块16，该天线2的辐射体21上的信号馈入点214到该金属块16的电流路径3为运用的通信频带的八分之一至二分之一波长，以四分之一波长为最佳。Please refer to FIG. 4 , which is a schematic diagram of the current path of the antenna installed in the mobile electronic device of the present invention. As shown in the figure: after the grounding body 22 and the metal block 16 of the antenna 2 of the present invention are electrically connected and installed on the casing 11 of the mobile electronic device 1, the open end of the antenna 2 faces the metal block 16, and the The current path 3 from the signal feeding point 214 on the radiator 21 to the metal block 16 is one-eighth to one-half wavelength of the communication frequency band used, preferably one-quarter wavelength.
天线2的末端213朝向该角落的金属块16，辐射体21上的信号馈入点214到该金属块16的电流路径3约为运用的通信频带的八分之一至二分之一波长，以四分之一波长为最佳。因此，在使用时可以降低SAR值，进而降低天线2的辐射对人体的伤害。The end 213 of the antenna 2 faces the metal block 16 at the corner, and the current path 3 from the signal feeding point 214 on the radiator 21 to the metal block 16 is about one-eighth to one-half wavelength of the communication frequency band used, A quarter wavelength is optimal. Therefore, the SAR value can be reduced during use, thereby reducing the damage to the human body caused by the radiation of the antenna 2 .
请参照图5，为本发明的天线的辐射体的末端（开路端）朝外（朝向金属块）及朝内（不朝向金属块）测量到的移动式电子装置上方（TOP）的SAR值的比较示意图，同时参照图2所示。如图所示：当本发明运用在宽带码分多址（WidebandCodeDivisionMultipleAccess，WCDMA）通信系统上时，传导功率为24dBm，频率为1850MHZ时，当天线2的辐射体21的末端213朝内（末端213不朝向金属块16）时，测量到的该移动式电子装置1上方的SAR值为4.76；当天线2的辐射体21的末端213朝外（末端213朝向金属块16）时，测量到的该移动式电子装置1上方的SAR值为2.99，该SAR值下降37.18%。Please refer to Fig. 5, which is the SAR value above the mobile electronic device (TOP) measured from the end (open end) of the radiator of the antenna of the present invention facing outward (toward the metal block) and inward (not towards the metal block). Compare the schematic diagrams and refer to Figure 2 at the same time. As shown in the figure: when the present invention is applied to a Wideband Code Division Multiple Access (WCDMA) communication system, the conduction power is 24dBm, and when the frequency is 1850MH Z , when the end 213 of the radiator 21 of the antenna 2 faces inward (the end 213 does not face the metal block 16), the measured SAR value above the mobile electronic device 1 is 4.76; when the end 213 of the radiator 21 of the antenna 2 faces outward (the end 213 faces the metal block 16), the measured The SAR value above the mobile electronic device 1 is 2.99, and the SAR value drops by 37.18%.
频率在1880MHZ时，当天线2的辐射体21的末端213朝内（末端213不朝向强金属块16）时，测量到的该移动式电子装置1上方的SAR值为5.08；当天线2的辐射体21的末端213朝外（末端213朝向金属块16）时，测量到的该移动式电子装置1上方的SAR值为2.97，该SAR值下降41.53%。When the frequency is 1880MH Z , when the end 213 of the radiator 21 of the antenna 2 faces inward (the end 213 does not face the strong metal block 16), the measured SAR value above the mobile electronic device 1 is 5.08; when the antenna 2 When the end 213 of the radiator 21 faces outward (the end 213 faces the metal block 16 ), the measured SAR value above the mobile electronic device 1 is 2.97, and the SAR value drops by 41.53%.
频率在1910MHZ时，当天线2的辐射体21的末端213朝内（末端213不朝向金属块16）时，测量到的该移动式电子装置1上方的SAR值为5.5；当天线2的辐射体21的末端213朝外（末端213朝向金属块16）时，测量到的该移动式电子装置1上方的SAR值为3.4，该SAR值下降38.18%。When the frequency is 1910 MHz , when the end 213 of the radiator 21 of the antenna 2 faces inward (the end 213 does not face the metal block 16), the measured SAR value above the mobile electronic device 1 is 5.5; when the radiation of the antenna 2 When the end 213 of the body 21 faces outward (the end 213 faces the metal block 16 ), the measured SAR value above the mobile electronic device 1 is 3.4, and the SAR value drops by 38.18%.
请参照图6，为本发明的天线的辐射体的末端（开路端）朝外（朝向金属块）及朝内（不朝向金属块）测量到的移动式电子装置背面（BACK）的SAR值的比较示意图，同时参照图2所示。如图所示：当本发明运用在WCDMA通信系统上时，传导功率为24dBm，频率在1850MHZ时，当天线2的辐射体21的末端213朝内（末端213不朝向金属块16）时，测量到的该移动式电子装置1背面的SAR值为2.14；当天线2的辐射体21的末端213朝外（末端213朝向金属块16）时，测量到的该移动式电子装置1背面的SAR值为1.82，该SAR值下降14.95%。Please refer to Figure 6, which is the SAR value of the back (BACK) of the mobile electronic device measured outward (towards the metal block) and inward (not towards the metal block) of the radiator of the antenna of the present invention. Compare the schematic diagrams and refer to Figure 2 at the same time. As shown in the figure: when the present invention is applied to the WCDMA communication system, the conduction power is 24dBm, and the frequency is 1850MHZ , when the end 213 of the radiator 21 of the antenna 2 faces inward (the end 213 does not face the metal block 16), The measured SAR value on the back of the mobile electronic device 1 is 2.14; when the end 213 of the radiator 21 of the antenna 2 faces outward (the end 213 faces the metal block 16), the measured SAR on the back of the mobile electronic device 1 The value is 1.82, and the SAR value drops by 14.95%.
频率在1880MHZ时，当天线2的辐射体21的末端213朝内（末端213不朝向金属块16）时，测量到的该移动式电子装置1背面的SAR值为2.26；当天线2的辐射体21的末端213朝外（末端213朝向金属块16）时，测量到的该移动式电子装置1背面的SAR值为1.87，该SAR值下降17.25%。When the frequency is 1880 MHz , when the end 213 of the radiator 21 of the antenna 2 faces inward (the end 213 does not face the metal block 16), the measured SAR value of the back of the mobile electronic device 1 is 2.26; when the radiation of the antenna 2 When the end 213 of the body 21 faces outward (the end 213 faces the metal block 16 ), the measured SAR value of the back of the mobile electronic device 1 is 1.87, and the SAR value drops by 17.25%.
频率在1910MHZ时，当天线2的辐射体21的末端213朝内（末端213不朝向金属块16）时，测量到的该移动式电子装置1背面的SAR值为2.4；当天线2的辐射体21的末端213朝外（末端213朝向金属块16）时，测量到的该移动式电子装置1背面的SAR值为1.87，该SAR值下降22.08%。When the frequency is 1910 MHz , when the end 213 of the radiator 21 of the antenna 2 faces inward (the end 213 does not face the metal block 16), the measured SAR value on the back of the mobile electronic device 1 is 2.4; when the radiation of the antenna 2 When the end 213 of the body 21 faces outward (the end 213 faces the metal block 16 ), the measured SAR value of the back of the mobile electronic device 1 is 1.87, and the SAR value drops by 22.08%.
以上所述，仅为本发明的较佳实施例的具体说明，并非用以局限本发明的保护范围，其它任何等效变换均应属于本申请的权利要求范围。The above descriptions are only specific descriptions of preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any other equivalent transformations shall fall within the scope of the claims of the present application.
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| US7304616B1 (en) * | 2006-08-28 | 2007-12-04 | Cheng Uei Precision Industry Co., Ltd. | Antenna structure of mobile phone |
| CN102098070A (en) * | 2011-02-17 | 2011-06-15 | 上海安费诺永亿通讯电子有限公司 | Communication terminal capable of effectively reducing HAC/SAR of antenna |
| CN102291954A (en) * | 2010-06-21 | 2011-12-21 | 汉达精密电子(昆山)有限公司 | Composite shell structure |
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| US7304616B1 (en) * | 2006-08-28 | 2007-12-04 | Cheng Uei Precision Industry Co., Ltd. | Antenna structure of mobile phone |
| CN102291954A (en) * | 2010-06-21 | 2011-12-21 | 汉达精密电子(昆山)有限公司 | Composite shell structure |
| CN102098070A (en) * | 2011-02-17 | 2011-06-15 | 上海安费诺永亿通讯电子有限公司 | Communication terminal capable of effectively reducing HAC/SAR of antenna |
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