CN103296386A - Multi-band frequency built-in aerial with low SAR value - Google Patents
Multi-band frequency built-in aerial with low SAR value Download PDFInfo
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- CN103296386A CN103296386A CN2012100417383A CN201210041738A CN103296386A CN 103296386 A CN103296386 A CN 103296386A CN 2012100417383 A CN2012100417383 A CN 2012100417383A CN 201210041738 A CN201210041738 A CN 201210041738A CN 103296386 A CN103296386 A CN 103296386A
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Abstract
The invention relates to a multi-band frequency built-in aerial with low SAR value. The multi-band frequency built-in aerial comprises a low-frequency parasitic branch, an independent branch, a high-frequency parasitic branch, a short circuit branch, a grounding point and a feed point. The low-frequency parasitic branch is connected with the high-frequency parasitic branch through the short-circuit branch in a short-circuit mode. The independent branch is arranged in a space enclosed by the low-frequency parasitic branch and the high-frequency parasitic branch. The grounding point is located under the high-frequency parasitic branch. The feed point is located under the short-circuit branch. Compared with the prior art, the multi-band frequency built-in aerial has the advantages of being good in wireless communication performance and low in SAR value.
Description
Technical field
The present invention relates to a kind of built-in aerial, especially relate to a kind of multi-band internal antenna of low SAR value.
Background technology
Whether the electromagnetic radiation of mobile phone and earphone-microphone meets standard, uses specific absorption rate (SAR, Specific Absorption Rate) to evaluate and test usually.Specific absorption rate refers to the electromagnetic wave energy (W) by average biological tissue's unit mass (kg) absorption of small sample amount.When the SAR value was higher than 4W/kg, radioactive exposure may damage health.Requirement and the European Union proposed standard 1999/519/EC domestic to the U.S. according to requirement, the FCC of ICNIRP
*, the SAR value of products such as earphone-microphone and mobile phone is as follows: U.S.'s limit value: the specific absorption rate≤1.6W/kg of 1 gram biological tissue, European Union's limit value: the specific absorption rate≤2.0W/kg of 10 gram biological tissues.
In order to communicate with network, mobile phone radiates low-level radio wave (also being radio frequency or ' RF ' energy) in use.Whole world national governments have all adopted comprehensive world security criterion of being formulated by separate science mechanism, manage the exposure of radio-frequency energy.Mobile phone is to be designed to and can to use in these very strict limits.
Though be prerequisite with the maximum rated power at laboratory tests SAR, mobile phone actual SAR level in use is significantly less than this numerical value.This is because mobile phone is to be designed to connecting stable operation on the required lowest power.Therefore, more near apart from the base station, the level of actual SAR just might be more low.
The variation of SAR does not also mean that what variation fail safe has.Though the SAR level of the mobile phone of various models may be different, all mobile phones all must satisfy the standard that radio frequency exposes, and namely the SAR value must be low as much as possible, human body are impacted avoiding.
The mode of the existing SAR of falling mainly is the target that reaches reduction SAR by the radiant power of control antenna, but this can reduce the radiance of antenna to a certain extent simultaneously, is difficult to satisfy operator on the contrary to the minimum communication performance requirement of mobile communication equipment.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of multi-band internal antenna that had both possessed the low SAR value of good wireless communication performance for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of multi-band internal antenna of low SAR value, it is characterized in that, comprise the parasitic branch of low frequency, individual branches, the parasitic branch of high frequency, short circuit branch, earth point and feedback point, be connected by the short circuit of short circuit branch between the parasitic branch of described low frequency and the high frequency parasitism branch, described individual branches is arranged in the space that the parasitic branch of low frequency and high frequency parasitism branch surround, described earth point is positioned at the below of the parasitic branch of high frequency, and described feedback point is positioned at the below of short circuit branch.
Be provided with the first coupling slit between the parasitic branch of described individual branches and low frequency.
Be provided with the second coupling slit between the parasitic branch of described individual branches and high frequency.
Be provided with the 3rd coupling slit between described earth point and the feedback point.
Be provided with the 4th coupling slit between the parasitic branch of described high frequency and the short circuit branch.
Be provided with the 5th coupling slit between the parasitic branch of described low frequency and the feedback point.
Compared with prior art, the present invention can effectively solve operator and client both sides' demand, namely not only possesses the good wireless communication performance, also possesses lower SAR value.
Description of drawings
Fig. 1 is the structural representation of antenna of the present invention.
Among the figure: the parasitic branch of 1-low frequency, the 2-individual branches, the parasitic branch of 3-high frequency, 4-short circuit branch, the 5-earth point, 6-presents point.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of multi-band internal antenna of low SAR value, comprise the parasitic branch 1 of low frequency, individual branches 2, the parasitic branch 3 of high frequency, short circuit branch 4, earth point 5 and feedback point 6, be connected by 5 short circuits of short circuit branch between the parasitic branch 1 of described low frequency and the high frequency parasitism branch 3, described individual branches 2 is arranged in the space that the parasitic branch 1 of low frequency and the parasitic branch 3 of high frequency surround, described earth point 5 is positioned at the below of the parasitic branch 3 of high frequency, and described feedback point 6 is positioned at the below of short circuit branch 4.
Be provided with the first coupling slit between the parasitic branch 1 of described individual branches 2 and low frequency.Be provided with the second coupling slit between the parasitic branch 3 of described individual branches 2 and high frequency.Be provided with the 3rd coupling slit between described earth point 5 and the feedback point 6.Be provided with the 4th coupling slit between the parasitic branch 3 of described high frequency and the short circuit branch 4.Be provided with the 5th coupling slit between the parasitic branch 1 of described low frequency and the feedback point 6.
Antenna produces broadband resonance at 0.9GHz and 1.9GHz place, thereby can convert the electrical signal to form of electromagnetic wave with good the transferring out of signal, namely realizes the good wireless communication performance.
Be provided with first spacing between the parasitic branch of described individual branches and high and low frequency, length and the width of regulating individual branches are not influencing under the resonance situation of antenna itself to reach, and change the radiation direction of antenna.
Be provided with the 3rd spacing between described earth point and the feedback point, further improve the radiation efficiency of antenna.
Claims (6)
1. the multi-band internal antenna of a low SAR value, it is characterized in that, comprise the parasitic branch of low frequency, individual branches, the parasitic branch of high frequency, short circuit branch, earth point and feedback point, be connected by the short circuit of short circuit branch between the parasitic branch of described low frequency and the high frequency parasitism branch, described individual branches is arranged in the space that the parasitic branch of low frequency and high frequency parasitism branch surround, described earth point is positioned at the below of the parasitic branch of high frequency, and described feedback point is positioned at the below of short circuit branch.
2. the multi-band internal antenna of a kind of low SAR value according to claim 1 is characterized in that, is provided with the first coupling slit between the parasitic branch of described individual branches and low frequency.
3. the multi-band internal antenna of a kind of low SAR value according to claim 1 is characterized in that, is provided with the second coupling slit between the parasitic branch of described individual branches and high frequency.
4. the multi-band internal antenna of a kind of low SAR value according to claim 1 is characterized in that, is provided with the 3rd coupling slit between described earth point and the feedback point.
5. the multi-band internal antenna of a kind of low SAR value according to claim 1 is characterized in that, is provided with the 4th coupling slit between the parasitic branch of described high frequency and the short circuit branch.
6. the multi-band internal antenna of a kind of low SAR value according to claim 1 is characterized in that, is provided with the 5th coupling slit between the parasitic branch of described low frequency and the feedback point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210041738.3A CN103296386B (en) | 2012-02-22 | 2012-02-22 | Multi-band frequency built-in aerial with low SAR value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210041738.3A CN103296386B (en) | 2012-02-22 | 2012-02-22 | Multi-band frequency built-in aerial with low SAR value |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103296386A true CN103296386A (en) | 2013-09-11 |
| CN103296386B CN103296386B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210041738.3A Expired - Fee Related CN103296386B (en) | 2012-02-22 | 2012-02-22 | Multi-band frequency built-in aerial with low SAR value |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811088A (en) * | 2016-03-22 | 2016-07-27 | 歌尔声学股份有限公司 | Antenna device and mobile terminal |
| CN109950692A (en) * | 2019-03-05 | 2019-06-28 | 禾邦电子(苏州)有限公司 | A kind of multiband FPCB antenna |
| CN110048214A (en) * | 2019-03-05 | 2019-07-23 | 惠州Tcl移动通信有限公司 | A kind of antenna and wireless communication apparatus |
| CN111740224A (en) * | 2020-06-23 | 2020-10-02 | 华勤通讯技术有限公司 | Loop antenna, circuit board assembly and communication apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1414106A1 (en) * | 2002-10-22 | 2004-04-28 | Sony Ericsson Mobile Communications AB | Multiband radio antenna |
| CN2838054Y (en) * | 2005-04-30 | 2006-11-15 | 达智科技股份有限公司 | Tri-frequency flat panel antenna |
| CN1875522A (en) * | 2003-10-31 | 2006-12-06 | 索尼爱立信移动通讯股份有限公司 | Multi-band planar inverted-f antennas including floating parasitic elements and wireless terminals incorporating the same |
| CN1886863A (en) * | 2003-10-20 | 2006-12-27 | Lk产品有限公司 | Internal multiband antenna |
| CN101356689A (en) * | 2005-11-15 | 2009-01-28 | 索尼爱立信移动通讯股份有限公司 | Multi-frequency band antenna device for radio communication terminal having wide high- |
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2012
- 2012-02-22 CN CN201210041738.3A patent/CN103296386B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1414106A1 (en) * | 2002-10-22 | 2004-04-28 | Sony Ericsson Mobile Communications AB | Multiband radio antenna |
| CN1886863A (en) * | 2003-10-20 | 2006-12-27 | Lk产品有限公司 | Internal multiband antenna |
| CN1875522A (en) * | 2003-10-31 | 2006-12-06 | 索尼爱立信移动通讯股份有限公司 | Multi-band planar inverted-f antennas including floating parasitic elements and wireless terminals incorporating the same |
| CN2838054Y (en) * | 2005-04-30 | 2006-11-15 | 达智科技股份有限公司 | Tri-frequency flat panel antenna |
| CN101356689A (en) * | 2005-11-15 | 2009-01-28 | 索尼爱立信移动通讯股份有限公司 | Multi-frequency band antenna device for radio communication terminal having wide high- |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811088A (en) * | 2016-03-22 | 2016-07-27 | 歌尔声学股份有限公司 | Antenna device and mobile terminal |
| CN109950692A (en) * | 2019-03-05 | 2019-06-28 | 禾邦电子(苏州)有限公司 | A kind of multiband FPCB antenna |
| CN110048214A (en) * | 2019-03-05 | 2019-07-23 | 惠州Tcl移动通信有限公司 | A kind of antenna and wireless communication apparatus |
| CN109950692B (en) * | 2019-03-05 | 2024-05-07 | 禾邦电子(苏州)有限公司 | Multiband FPCB antenna |
| CN111740224A (en) * | 2020-06-23 | 2020-10-02 | 华勤通讯技术有限公司 | Loop antenna, circuit board assembly and communication apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103296386B (en) | 2015-06-17 |
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Effective date of registration: 20170123 Address after: 518110 Guangdong province Shenzhen city Longhua District Guanlan Street big Fuyuan Industrial Zone Industrial Park C building 3 floor shunluo Patentee after: Hai Demen Electronics Co., Ltd. of Shenzhen Address before: Minhang District town Shanghai City, 201108 bottles of No. 1259, No. 3 Building Patentee before: Shanghai Deman Electronics Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20180222 |