CN101404352A - Antenna - Google Patents
Antenna Download PDFInfo
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- CN101404352A CN101404352A CNA2008102351257A CN200810235125A CN101404352A CN 101404352 A CN101404352 A CN 101404352A CN A2008102351257 A CNA2008102351257 A CN A2008102351257A CN 200810235125 A CN200810235125 A CN 200810235125A CN 101404352 A CN101404352 A CN 101404352A
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- antenna
- auxilliary
- absorption rate
- radiation
- specific absorption
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Abstract
The invention provides an antenna which comprises a main antenna that is installed at one side of a PCB; the antenna is characterized in that the other side of the PCB is provided with an auxiliary antenna. The antenna can realize that when the antenna engineer debugs out the best TRP without the consideration about antenna types, the auxiliary antenna is added to reduce specific absorption rate, thus reducing the difficulty in the design of the antenna and the specific absorption rate of the antenna as well as being simpler and more convenient.
Description
Technical field
The present invention relates to antenna, particularly reduce the technology of antenna ratio absorptivity.
Background technology
In 50 years, scientist has all over the world been radiated radio wave health affected has been carried out deep research in the past.The safety standard and the standard that are ensured for publilc health by the countries in the world approval have consequently been set up based on science data, these standards and norms are that comprehensive professional assessment with feasible scientific research is a foundation, the volume reflection limit of its regulation has been considered many safety factors, and far below any volume reflection grade that can impact health.Therefore, these standards can provide sufficient safeguard protection for user and the public.China is the first in the world mobile phone big country, has nearly 400,000,000 mobile phones.Mobile phone leaves people's brain and eyeball when using very near, and whether people's health is influenced, and this is that broad masses are concerned about.That is to say should testing mobile phone whether the specific absorption rate value (SAR value) of human body radiation be met the radiation danger criterion of generally acknowledging in the world.
At present, about the safety standard of SAR, Europe is 2 watts/kilogram, and the U.S. is 1.6 watts/kilogram.In China, according to the final draft (the whole nation consults on) of " electromagnetic radiation exposure limit value and method of measurement " state compulsory standard, wherein relevant mobile phone radiation limit value standard is 1 watt/kilogram.On August 1st, 2004 rose, and the Ministry of Information Industry makes stipulations, and all mobile phone kinds of China must can obtain the telecommunication apparatus licence for entry to network by after the test passes of SAR, and are to execute.Specific absorption rate; Be the SAR value, it is average to clock with any 6 minutes, the electromagnetic radiation energy that the per kilogram tissue absorbs (watt).With the mobile phone radiation is example, and SAR refers to radiation by the ratio of the soft tissue absorbed of head, and the SAR value is low more, and radiation is few more by the amount that brain absorbs, and still, this does not represent that the SAR grade is directly relevant with cellphone subscriber's health.Specific absorption rate is generally measured the influence size of mobile phone radiation to human body exactly.At present international standard has two, and one is European standard 2w/kg, and one is Unite States Standard 1.6w/kg, and its concrete implication is meant, with 6 minutes be timing, the electromagnetic radiation energy that the per kilogram tissue absorbs must not be above 2 watts.At present the mobile phone sold of regular channel on the market all is to design according to this standard, and has passed through the appropriate authority test, average SAR value greatly about 0.2w/kg between the 1.5w/kg.
Therefore, at the research and development test phase of mobile phone, just need carry out repeatedly the specific absorption rate test, if the specific absorption rate value exceeds standard, mobile phone just need be debugged again so, mainly is the debugging of antenna.For monopole antenna, method floor file below antenna of traditional reduction specific absorption rate, but such method has significant limitation.How further reducing specific absorption rate again, reducing the concrete way of specific absorption rate at present has following several:
Method one: we at first find the focus (method can be to observe with the microwave software emulation or with infrared equipment) of aerial radiation, floor file below antenna, and specific absorption rate may reduce, and still, the TRP of mobile phone integral body can reduce;
Method two: change antenna match;
Method three: it is continuous to add the conduction bubble;
Method four: add absorbing material;
Method five: add pottery.
Some patent documentations about above method:
LK200416_WO2006114477---is that a kind of antenna pattern of open flume type helps to improve SAR
LK200417_WO2006084951 (A1)---be a kind of Monopole antenna
LK9910_US6348892 (B1)----dual-layer atenna
US6958737(B2)------LOOP?antenna
EP777295 (A2, A3)-----double-deck Patch antenna
US20080055160 (A1)------IFA type antenna
The another kind of Slot antenna of WO2005109567------
Thereby the way that more than solves SAR all is to obtain the low result of SAR by changing main antenna itself, and concrete enforcement is very difficult concerning Antenna Design teacher.
Summary of the invention
At above-mentioned defective, antenna provided by the invention, can realize: the antenna of any kind only needs the antenna works teacher to debug out best TRP, if the SAR value is high, another side at this PCB is provided with auxilliary antenna, thereby makes other directions of radiation direction of antenna disperse to reduce the SAR value, reduces bit rate, the total amount of radiation of antenna is constant, thereby keeps the radiant power of antenna integral body.
Antenna provided by the invention comprises main antenna, and this main antenna is installed in the one side of PCB, at the another side of this PCB auxilliary antenna is set.
Preferably, the radiation direction of above-mentioned main antenna and auxilliary antenna is opposite, and the resonance frequency section comprises the resonance frequency section of described main antenna specific absorption rate when high at least.
Preferably, the resonance frequency section of above-mentioned auxilliary antenna is the resonance frequency section of described main antenna specific absorption rate when high.
Preferably, above-mentioned auxilliary antenna has independent match circuit.
Preferably, above-mentioned auxilliary antenna and the shared match circuit of main antenna.
Preferably, above-mentioned auxilliary antenna is printed on the pcb board.
When people used hand-hold communication appliance near brain, antenna energy constituted harm to brain to brain.Under the situation of having only main antenna to exist, must be to the radiation of brain strong especially (the SAR value be high) in certain frequency band, if it is the radiation (can reduce the SAR value) that can reduce brain really that the user changes the direction of antenna at this moment, but the user does not know that the direction that how to change antenna just can reduce the SAR value.Antenna provided by the invention, except that main antenna, also auxilliary antenna is installed at the another side of PCB, the radiation of antenna is sent from different directions, as everyone knows, the radiation of antenna is when the particularly close together of certain directivity is arranged, thereby disperseed the radiation of main antenna, played the effect that reduces the SAR value brain.
In preferred version of the present invention, the radiation direction of main antenna and auxilliary antenna is opposite, and auxilliary antenna resonant frequency section comprises the resonance frequency section of main antenna specific absorption rate when high at least, main antenna is the specific absorption rate height in certain frequency band, auxilliary antenna disperses the total radiation of antenna on this frequency band, and radiate from the direction opposite with main antenna, thereby reduce the SAR value, reduce radiation to human brain.
The form of auxilliary antenna can be various, and is not necessarily consistent with main antenna.
The present invention can realize: do not need to consider the type of antenna, the same day, the line engineer debugged out best TRP, increased auxilliary antenna and reduced specific absorption rate, thereby reduce the difficulty of Antenna Design, and it is easier to hang down the antenna ratio absorptivity simultaneously.
Description of drawings
Accompanying drawing 1 is the structural representation of the embodiment of the invention.
Embodiment
As shown in Figure 1, the antenna that the embodiment of the invention provides, comprise main antenna (1), this main antenna (1) is installed in the one side of PCB (2), another side at this PCB (2) is provided with auxilliary antenna (3), and the radiation direction of above-mentioned main antenna (1) and auxilliary antenna (3) is opposite, and the resonance frequency section of described auxilliary antenna (3) comprises the resonance frequency section of described main antenna (1) when specific absorption rate is high at least.
The form of auxilliary antenna (3) can be various, and is not necessarily consistent with main antenna (1).Auxilliary antenna (3) can have independent match circuit, also can and the shared match circuit of main antenna (1), can not have match circuit yet, can also directly be printed on the PCB (2).
When people used hand-hold communication appliance near brain, antenna energy constituted harm to brain to brain.Existing antenna, have only under the situation of main antenna existence, must be to the radiation of brain strong especially (the SAR value be high) in certain frequency band, if it is the radiation (can reduce the SAR value) that can reduce brain really that the user changes the direction of antenna at this moment, but the user does not know that the direction that how to change antenna just can reduce the SAR value.The antenna that the embodiment of the invention provides, except that main antenna, also auxilliary antenna is installed at the another side of PCB, make the radiation direction of main antenna and auxilliary antenna opposite, and auxilliary antenna resonant frequency section comprises the resonance frequency section of main antenna specific absorption rate when high at least, main antenna is the specific absorption rate height in certain frequency band, and auxilliary antenna disperses the total radiation of antenna on this frequency band, and radiate from the direction opposite with main antenna, thereby reduce the SAR value, reduce radiation human brain.
The embodiment of the invention can realize: do not need to consider the type of antenna, the same day, the line engineer debugged out best TRP, increased auxilliary antenna and reduced specific absorption rate, thereby reduce the difficulty of Antenna Design, and it is easier to hang down the antenna ratio absorptivity simultaneously.
Claims (6)
1, a kind of antenna comprises main antenna, and this main antenna is installed in the one side of PCB, it is characterized in that, at the another side of this PCB auxilliary antenna is set.
2, antenna according to claim 1 is characterized in that, the radiation direction of above-mentioned main antenna and auxilliary antenna is opposite, and the resonance frequency section comprises the resonance frequency section of described main antenna specific absorption rate when high at least.
3, antenna according to claim 2 is characterized in that, the resonance frequency section of above-mentioned auxilliary antenna is the resonance frequency section of described main antenna specific absorption rate when high.
4, antenna according to claim 3 is characterized in that, above-mentioned auxilliary antenna has independent match circuit.
5, antenna according to claim 3 is characterized in that, above-mentioned auxilliary antenna and the shared match circuit of main antenna.
6, antenna according to claim 3 is characterized in that, above-mentioned auxilliary antenna is printed on the pcb board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102351257A CN101404352A (en) | 2008-11-14 | 2008-11-14 | Antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102351257A CN101404352A (en) | 2008-11-14 | 2008-11-14 | Antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101404352A true CN101404352A (en) | 2009-04-08 |
Family
ID=40538262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102351257A Pending CN101404352A (en) | 2008-11-14 | 2008-11-14 | Antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN101404352A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916261A (en) * | 2011-08-02 | 2013-02-06 | 广达电脑股份有限公司 | Antenna combination capable of reducing specific absorption rate of electromagnetic wave |
| CN106229689A (en) * | 2016-08-31 | 2016-12-14 | 宁波艾思科汽车音响通讯有限公司 | A kind of 4G antenna |
-
2008
- 2008-11-14 CN CNA2008102351257A patent/CN101404352A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916261A (en) * | 2011-08-02 | 2013-02-06 | 广达电脑股份有限公司 | Antenna combination capable of reducing specific absorption rate of electromagnetic wave |
| CN102916261B (en) * | 2011-08-02 | 2015-02-04 | 广达电脑股份有限公司 | Antenna combination capable of reducing specific absorption rate of electromagnetic wave |
| CN106229689A (en) * | 2016-08-31 | 2016-12-14 | 宁波艾思科汽车音响通讯有限公司 | A kind of 4G antenna |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20090408 |