CN204243174U - A kind of antenna structure - Google Patents
A kind of antenna structure Download PDFInfo
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- CN204243174U CN204243174U CN201420610391.4U CN201420610391U CN204243174U CN 204243174 U CN204243174 U CN 204243174U CN 201420610391 U CN201420610391 U CN 201420610391U CN 204243174 U CN204243174 U CN 204243174U
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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Abstract
The utility model provides a kind of antenna structure, comprising: two-arm antenna; Be connected with described two-arm antenna and two-arm antenna carried out to the mainboard of feed; Described two-arm antenna comprises: for realize low-frequency resonant the first arm, for realize high-frequency resonant the second arm and coupling minor matters; Wherein, the first end of described first arm and the first end of described second arm are connected to described mainboard respectively; Described coupling minor matters are parallel to described second arm, comprise: the first minor matters part and the second minor matters part, the Part I of wherein said first minor matters part and the second arm is arranged side by side, the part that the second end that the Part I of described second arm is formed as the second arm extends towards first end; Described second minor matters part extends relative to the direction of the first minor matters part to the first end away from the second arm; Described second minor matters part is connected with the first arm.The antenna structure of the utility model embodiment, reduces the specific absorption rate SAR of antenna, reduces the radiation injury to human body.
Description
Technical field
The utility model relates to the communications field, particularly a kind of antenna structure.
Background technology
SAR and specific absorption rate.Under the effect of external electromagnetic field, in human body, induction field will be produced.Because the various organ of human body is lossy dielectric, therefore in body, electromagnetic field will generation current, causes absorbing and dissipative electromagnetic energy.In biological dosimetry, conventional SAR characterizes this physical process.SAR is defined as the electromagnetic power that tissue absorbed or consumed of unit mass, and unit is W/kg.
Along with wireless communication technology develop rapidly, wireless terminal (mobile phone, data card, MiFi/Hotspot) product has been widely applied in life.Meanwhile, the public is also more and more concerned about that the electromagnetic radiation that brings of wireless terminal product is on the impact of health.Therefore the current SAR of much market to mobile terminal product proposes requirement, many products all must meet FCC/CE SAR requirement.This just has higher requirement to mobile terminal antenna design.Current falls SAR technology, many employings reduces cable power, absorbing material etc., these aspects or be the total radiant power TRP sacrificing antenna, have impact on signal of communication, just be the increase in cost and complex procedures degree, from basic Antenna Design, do not solve the problem of SAR veritably.
Now low-profile, frivolous mobile terminal to leave the headroom of antenna for smaller, highly also lower, when the frequency range needing to cover is more, Antenna Design can adopt substantially is exactly multi-arm one pole, one pole adds parasitism and adds the forms such as parasitic with IFA, and although the high frequency (1700-2700MHz) that this several cabling form is come out of is general active test OTA better performances, but SAR value generally all can be higher, even cause SAR value to exceed standard, become one of difficult problem of mobile terminal antenna design.
As shown in Figure 1, be common monopole two-arm antenna, in this kind of antenna structure, mainboard 1 is connected with one pole two-arm antenna by distributing point and impedance matching network, carries out feed to one pole two-arm antenna.
Fig. 2 is the detailed structure view of Fig. 1 common monopole two-arm antenna, and common monopole two-arm antenna is made up of two-arm, i.e. low frequency long-armed 51 and high-frequency short arm 52; Its medium and low frequency long-armed 51 is mainly used in realizing low-frequency resonant, and comparatively ideal situation also can regulate its length and impedance matching network, utilize its two frequency multiplication to realize the resonance of high band, but now high frequency bandwidth is narrower, and resonance location is restricted; High-frequency short arm 52 is for realizing the resonance of high frequency, its design is comparatively flexible, length freely can control according to the frequency range of required realization, comparatively ideal situation, adjustable two arm lengths and impedance matching network, the resonance that two times of resonance of low frequency long-armed 51 and high-frequency short arm 52 are produced is staggered to be merged, can the bandwidth of broadening antenna.But the major defect of this common monopole two-arm antenna is, the SAR value of the high band realized by high-frequency short arm 52 is general all higher.
Utility model content
The purpose of this utility model is to provide a kind of antenna structure, effectively reduces the specific absorption rate SAR of two-arm antenna.
In order to achieve the above object, the utility model provides a kind of antenna structure, comprising:
Two-arm antenna;
Be connected with described two-arm antenna and described two-arm antenna carried out to the mainboard of feed;
Further, described two-arm antenna comprises: for realize low-frequency resonant the first arm, for realize high-frequency resonant the second arm and coupling minor matters.
Further, the first end of described first arm and the first end of described second arm are connected to described mainboard respectively;
Further, described coupling minor matters are parallel to described second arm, comprise: the first minor matters part and the second minor matters part, the Part I of wherein said first minor matters part and described second arm is arranged side by side, the part that the second end that the Part I of described second arm is formed as described second arm extends towards first end; Described second minor matters part extends relative to the direction of described first minor matters part to the first end away from described second arm; Described second minor matters part is connected with described first arm.
Further, the length of described first minor matters part is less than 10mm.
Further, described second minor matters part away from the distance of one end of described first minor matters part and the second end of described first arm between 10mm to 15mm.
Further, the first end of described first arm is connected with described mainboard with impedance matching by distributing point.
Further, the first end of described second arm is connected with the first end of described first arm.
Further, the first end of described second arm is connected with described mainboard by earth point.
Further, the distance between described earth point and described distributing point is less than a preset value, and described preset value is 5mm.
Further, when described two-arm antenna is reversed F-typed two-arm antenna, the first end of described first arm is also connected with described mainboard by described earth point.
Further, the first end of described second arm is connected with the first end of described first arm.
Further, the first end of described second arm is connected with described mainboard by described earth point.
The beneficial effect of technique scheme of the present utility model is as follows:
In such scheme, antenna structure includes mainboard, two-arm antenna, and mainboard carries out feed by distributing point and impedance matching to two-arm antenna; The first arm in two-arm antenna is connected with mainboard by impedance matching and distributing point, and the second arm is drawn by the top of the first arm or drawn by earth point; In addition, coupling minor matters have also been drawn by the end of the first arm, interlock parallel with the second arm end of coupling minor matters is coupled, the CURRENT DISTRIBUTION on second is changed by coupling, dispersion electric field, thus improve situation higher by the high band SAR value of the second arm realization in common monopole two-arm antenna, reduce the SAR value of antenna.
Accompanying drawing explanation
Fig. 1 represents the structural representation of common monopole two-arm antenna now;
Fig. 2 represents the detailed structure view of common monopole two-arm antenna in Fig. 1;
Fig. 3 represents a kind of antenna structure view in the utility model embodiment;
Fig. 4 represents the antenna detailed structure view of the utility model embodiment in Fig. 3;
Fig. 5 represents another the antenna detailed structure view in the utility model embodiment;
Fig. 6 represents a kind of IFA two-arm antenna detailed structure view in the utility model embodiment;
Fig. 7 represents another the IFA two-arm antenna detailed structure view in the utility model embodiment.
Description of reference numerals:
1-mainboard; 2-distributing point; 3-impedance matching; 4-earth point; 5-two-arm antenna; 51-low frequency is long-armed; 52-high-frequency short arm; The Part I of 521-high-frequency short arm; 53-is coupled minor matters; 531-first minor matters part; 532-second minor matters part.
Embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The utility model, for the higher problem of current terminal SAR value, provides a kind of antenna structure.
As shown in Fig. 3 to Fig. 7, the utility model embodiment provides a kind of antenna structure, reduces terminal high frequency SAR value, comprising:
Two-arm antenna 5;
Be connected with described two-arm antenna 5 and described two-arm antenna 5 carried out to the mainboard 1 of feed;
Particularly, described two-arm antenna 5 comprises: for realize low-frequency resonant the first arm, for realize high-frequency resonant the second arm and coupling minor matters 53, in the present embodiment for realize low-frequency resonant the first arm corresponding diagram 3 shown in low frequency long-armed 51, for realize high-frequency resonant the second arm corresponding diagram 3 shown in high-frequency short arm 52.
The first end of described low frequency long-armed 51 and the first end of described high-frequency short arm 52 are connected to described mainboard respectively;
Described coupling minor matters are parallel to described high-frequency short arm 52, comprise: the first minor matters part 531 and the second minor matters part 532, wherein said first minor matters part 531 is arranged side by side with the Part I 521 of described high-frequency short arm, the part that the second end that the Part I 521 of described high-frequency short arm is formed as described high-frequency short arm 52 extends towards first end; Described second minor matters part 532 extends relative to the direction of described first minor matters part 531 to the first end away from described high-frequency short arm 52; Described second minor matters part 532 is connected with described low frequency long-armed 51.
Particularly, the length of described first minor matters part 531 is less than 10mm; Described second minor matters part 532 away from the distance of one end of described first minor matters part 531 and the second end of described low frequency long-armed 51 between 10mm to 15mm.
The first end of described low frequency long-armed 51 is connected with described mainboard 1 with impedance matching 3 by distributing point 2, and the first end of described high-frequency short arm 52 is connected with the first end of described low frequency long-armed 51.Further, the first end of described high-frequency short arm 52 directly can also be connected with described mainboard 1 by earth point 4.
Further, the distance between described earth point 4 and described distributing point 2 is less than a preset value, and described preset value is 5mm.
Again particularly, when described two-arm antenna is reversed F-typed two-arm antenna, the first end of described low frequency long-armed 51 is also connected with described mainboard 1 by described earth point 4, and the first end of described high-frequency short arm 52 is connected with the first end of described low frequency long-armed 51.Further, the first end of described high-frequency short arm 52 can also be connected with described mainboard 1 by earth point 4.
In such scheme, mainboard carries out feed by distributing point and impedance matching to two-arm antenna; Two-arm antenna is long-armed by low frequency, high-frequency short arm and coupling minor matters form; Low frequency is long-armed to be connected with mainboard by impedance matching and distributing point; High frequency is long-armed is drawn by low frequency galianconism top or is drawn by earth point; Distance between distributing point and earth point is generally less than 5mm; Coupling minor matters are drawn by the long-armed end 10-15mm of distance low frequency, and high-frequency short arm end is parallel staggered, and staggered distance is less than 10mm.Interlock parallel with high-frequency short arm end of coupling minor matters is coupled, the CURRENT DISTRIBUTION on high-frequency short arm is changed by coupling, dispersion electric field, thus improve the higher situation of the high band SAR value that realized by high-frequency short arm in common monopole two-arm antenna, reduce the SAR value of antenna.
As shown in Figure 3, the antenna in the utility model embodiment comprises master equally and comprises mainboard 1, distributing point 2, earth point 3, impedance matching 4 and one pole two-arm antenna 5.
As shown in Figure 4, different from common monopole two-arm antenna, the one pole two-arm antenna in the present embodiment, except comprising low frequency long-armed 51 and high-frequency short arm 52, also comprises coupling minor matters 53.The operation principle of this two-arm antenna and the operation principle of common monopole antenna similar, low band resonance is realized by the local oscillator resonance of low frequency long-armed 51, and high band resonances is realized jointly by two frequencys multiplication of low frequency long-armed 51 and high-frequency short arm 52.Because the SAR value of the high band realized by high-frequency short arm 52 in common monopole two-arm antenna is higher, the present embodiment introduces coupling minor matters 53 on Antenna Design, namely from the cabling that the long-armed 51 end 10-15mm extraction one of distance low frequency is shorter, it is made to move towards along high-frequency short arm 52 direction, and parallel with high-frequency short arm 52 end and there is the part of arranged in parallel, staggered distance is less than 10mm.Due to shorter by the coupling minor matters 53 that low frequency long-armed 51 is drawn, also less on low-frequency resonant impact, low-frequency resonant performance remains unchanged substantially; And the minor matters 53 that are coupled are interlocked with high-frequency short arm 52 equality, change the CURRENT DISTRIBUTION on former high-frequency short arm 52 by coupling, thus change peripheral electromagnetic field, disperseed, thus reach the object reducing high frequency SAR value.
As shown in Figure 5, another way of realization of SAR one pole two-arm antenna is reduced in the present embodiment.In this kind of way of realization, high-frequency short arm 52, as parasitic minor matters, is directly connected with earth point 4, but not draws from long-armed 51 tops of low frequency, and it carries out feed by the coupling between low frequency long-armed 51, can realize high band resonances.By the coupling of high-frequency short arm 52 with the minor matters 53 that are coupled, the SAR value of the high-frequency resonant produced by high-frequency short arm 52 can be reduced equally.
As shown in Figure 6, reduce another way of realization of SAR two-arm antenna in the present embodiment, this kind of two-arm antenna is realized by the form of IFA antenna+parasitic minor matters.Mainboard 1 is connected with the low frequency of two-arm antenna 5 long-armed 51 by distributing point 2 and impedance matching 3, and meanwhile, low frequency long-armed 51 is also connected with mainboard 1 by earth point 4, realizes the resonance of low-frequency range with IFA antenna, and realizes HFS resonance with its two frequency multiplication.High-frequency short arm 52 is drawn by long-armed 51 tops of low frequency, realizes high-frequency resonant; By regulating its length and impedance matching, the resonance that the resonance making it produce and long-armed 51 2 frequencys multiplication of low frequency produce is staggered to be merged, can broadening high frequency bandwidth.Coupling minor matters 53 are drawn by the long-armed 51 end 10-15mm of distance low frequency, along high-frequency short arm direction cabling, and it is parallel with high-frequency short arm end and there is the part of arranged in parallel, staggered distance is less than 10mm, also be change the electric current on high-frequency short arm by the coupling of itself and high-frequency short arm thus magnetic distribution near disperseing, reduce high frequency SAR value.
As shown in Figure 7, another way of realization of SAR two-arm antenna is reduced in the present embodiment.The low frequency long-armed 51 of this kind of two-arm antenna is the same with the antenna in Fig. 6, realizes with IFA antenna.Difference is that its high-frequency short arm 52 is drawn by earth point 4 but not the extraction of the top of low frequency long-armed 51.High-frequency short arm 52 in this way of realization carries out feed by the coupling of itself and low frequency long-armed 51, realizes high-frequency resonant.Equally, the SAR value of high frequency is reduced by high-frequency short arm 52 and the coupling be coupled between minor matters 53.
Table 1
Table 2
For this embodiment, the performance that effectively can reduce the one pole two-arm antenna (see Fig. 3) of mobile terminal SAR value in the common monopole two-arm antenna in such as Fig. 1 and the present embodiment is compared.See table 1 and table 2.Wherein table 1 is common monopole two-arm antenna performance table, and table 2 is for falling SAR one pole two-arm antenna performance table.Wherein WCDMA850, WCDMA1700 and WCDMA1900 represent three frequency ranges, and SAR represents the SAR value of the antenna of a certain channel of corresponding a certain frequency range, and the SAR data in form tests gained under the Dasy5SAR test macro of Speag company.
As can be seen from Table 1 and Table 2, compared with common monopole two-arm antenna, SAR one pole two-arm antenna falls in employing, the WCDMA1700 realized by parasitic high-frequency short arm, when TRP remains unchanged substantially, the SAR of three channels (8762,8846,8912) declines all to some extent, what SAR reduction amplitude was minimum is intermediate channels 8846, substantially the same (the common monopole two-arm antenna 19.4 of TRP, SAR one pole two-arm antenna 19.7 is fallen), largest face SAR value is respectively: common monopole two-arm antenna 1.86, falls SAR one pole two-arm antenna 1.07.As can be seen here, when TRP is suitable, adopts and fall SAR one pole two-arm antenna, substantially remained unchanged by the low frequency of the long-armed realization of low frequency and high-frequency band SAR value, the SAR of the high band realized by parasitic high-frequency short arm can decline about 0.8W/Kg.
So, the present embodiment passes through on the low frequency of two-arm antenna is long-armed, draw coupling minor matters, and along high-frequency short arm direction cabling, make it parallel with high-frequency short arm end staggered, produce coupling, thus change the CURRENT DISTRIBUTION on high-frequency short arm, dispersion magnetic distribution, reduces the SAR value of high frequency.
In addition, the relative position between two-arm antenna and mainboard can be arbitrary, gives reserved antenna headroom depending on designed product.For having certain thickness product, Antenna Design spatial altitude is guaranteed, and can realize with bracket antenna or LDS antenna (by laser direct forming), now two-arm antenna can be positioned at upper area or the lower zone of mainboard; For ultrathin products, Antenna Design spatial altitude is limited, one pole two-arm antenna then can direct etching on mainboard, with PCB antenna (wireless receiving and launch printed wiring board on part) realize.
The antenna structure of above-mentioned utility model embodiment, from the long-armed middle extraction coupling minor matters of the low frequency of two-arm antenna, because coupling minor matters are drawn by the long-armed end of low frequency, and length is shorter, therefore little on the impact of antenna low frequency performance; Interlock parallel with high-frequency short arm end of coupling minor matters is coupled, the CURRENT DISTRIBUTION on high-frequency short arm is changed by coupling, dispersion electric field, thus improve the higher situation of the high band SAR value that realized by high-frequency short arm in common monopole two-arm antenna, reduce the SAR value of antenna, reduce product to the injury of human body.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. an antenna structure, comprising: two-arm antenna; Be connected with described two-arm antenna and described two-arm antenna carried out to the mainboard of feed, it is characterized in that,
Described two-arm antenna comprises: for realize low-frequency resonant the first arm, for realize high-frequency resonant the second arm and coupling minor matters;
Wherein, the first end of described first arm and the first end of described second arm are connected to described mainboard respectively;
Wherein, described coupling minor matters are parallel to described second arm, comprise: the first minor matters part and the second minor matters part, the Part I of wherein said first minor matters part and described second arm is arranged side by side, the part that the second end that the Part I of described second arm is formed as described second arm extends towards first end; Described second minor matters part extends relative to the direction of described first minor matters part to the first end away from described second arm; Described second minor matters part is connected with described first arm.
2. antenna structure according to claim 1, is characterized in that, the length of described first minor matters part is less than 10mm.
3. antenna structure according to claim 1, is characterized in that, described second minor matters part away from the distance of one end of described first minor matters part and the second end of described first arm between 10mm to 15mm.
4. antenna structure according to claim 1, is characterized in that, the first end of described first arm is connected with described mainboard with impedance matching by distributing point.
5. antenna structure according to claim 4, is characterized in that, the first end of described second arm is connected with the first end of described first arm.
6. antenna structure according to claim 4, is characterized in that, the first end of described second arm is connected with described mainboard by earth point.
7. antenna structure according to claim 6, is characterized in that, the distance between described earth point and described distributing point is less than a preset value, and described preset value is 5mm.
8. antenna structure according to claim 4, is characterized in that, when described two-arm antenna is reversed F-typed two-arm antenna, the first end of described first arm is also connected with described mainboard by described earth point.
9. antenna structure according to claim 8, is characterized in that, the first end of described second arm is connected with the first end of described first arm.
10. antenna structure according to claim 8, is characterized in that, the first end of described second arm is connected with described mainboard by described earth point.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610391.4U CN204243174U (en) | 2014-10-21 | 2014-10-21 | A kind of antenna structure |
| PCT/CN2015/074777 WO2016061997A1 (en) | 2014-10-21 | 2015-03-20 | Antenna structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420610391.4U CN204243174U (en) | 2014-10-21 | 2014-10-21 | A kind of antenna structure |
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| CN204243174U true CN204243174U (en) | 2015-04-01 |
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| WO (1) | WO2016061997A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105529525A (en) * | 2014-10-21 | 2016-04-27 | 中兴通讯股份有限公司 | Antenna structure |
| CN107171057A (en) * | 2016-03-04 | 2017-09-15 | 神讯电脑(昆山)有限公司 | Multiband aerial |
| CN109075429A (en) * | 2016-05-06 | 2018-12-21 | 华为技术有限公司 | Antenna assembly and between each antenna element provide continuous insulation method |
| CN112257247A (en) * | 2020-10-16 | 2021-01-22 | 昆山睿翔讯通通信技术有限公司 | Antenna assembly and design method thereof |
| CN112332084A (en) * | 2020-10-19 | 2021-02-05 | 深圳市中诺通讯有限公司 | Antenna structure for improving hemispherical efficiency of GPS antenna of mobile phone |
| CN113540790A (en) * | 2021-04-26 | 2021-10-22 | 深圳市宏电技术股份有限公司 | MIMO antenna and electronic equipment |
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| CN107681272B (en) * | 2017-11-06 | 2023-10-17 | 深圳市信维通信股份有限公司 | Dual-coupling antenna under extremely small headroom |
| CN109509962B (en) * | 2018-11-19 | 2023-10-20 | 惠州硕贝德无线科技股份有限公司 | Dual-frequency MIMO antenna structure for 5G mobile phone terminal |
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| JP3986820B2 (en) | 2001-12-25 | 2007-10-03 | 森永乳業株式会社 | Electrolyzed water production equipment |
| KR100814432B1 (en) * | 2006-08-29 | 2008-03-18 | 삼성전자주식회사 | Dual band inverted f antenna reduced sar |
| US7710332B2 (en) * | 2007-08-17 | 2010-05-04 | Htc Corporation | Mobile communications device with a compact-sized three-dimensional antenna |
| CN102780072B (en) * | 2011-05-13 | 2015-04-22 | 宏碁股份有限公司 | Antenna assembly capable of reducing specific absorption rate of electromagnetic wave |
| CN202333125U (en) * | 2011-11-08 | 2012-07-11 | 上海安费诺永亿通讯电子有限公司 | Built-in antenna structure capable of reducing SAR (specific absorption rate) value of mobile terminal effectively |
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| GB2510318A (en) * | 2012-10-24 | 2014-08-06 | Microsoft Corp | Antenna device with reduced specific absorption rate (SAR) characteristics |
| US20140197997A1 (en) * | 2013-01-14 | 2014-07-17 | Auden Techno.Corp. | Antenna structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105529525A (en) * | 2014-10-21 | 2016-04-27 | 中兴通讯股份有限公司 | Antenna structure |
| CN107171057A (en) * | 2016-03-04 | 2017-09-15 | 神讯电脑(昆山)有限公司 | Multiband aerial |
| CN109075429A (en) * | 2016-05-06 | 2018-12-21 | 华为技术有限公司 | Antenna assembly and between each antenna element provide continuous insulation method |
| CN109075429B (en) * | 2016-05-06 | 2020-04-03 | 华为技术有限公司 | Antenna device and method for forming antenna of wireless communication device |
| US10665925B2 (en) | 2016-05-06 | 2020-05-26 | Futurewei Technologies, Inc. | Antenna apparatus and method with dielectric for providing continuous insulation between antenna portions |
| CN112257247A (en) * | 2020-10-16 | 2021-01-22 | 昆山睿翔讯通通信技术有限公司 | Antenna assembly and design method thereof |
| CN112257247B (en) * | 2020-10-16 | 2024-01-09 | 昆山睿翔讯通通信技术有限公司 | Antenna assembly and design method thereof |
| CN112332084A (en) * | 2020-10-19 | 2021-02-05 | 深圳市中诺通讯有限公司 | Antenna structure for improving hemispherical efficiency of GPS antenna of mobile phone |
| CN113540790A (en) * | 2021-04-26 | 2021-10-22 | 深圳市宏电技术股份有限公司 | MIMO antenna and electronic equipment |
| CN113540790B (en) * | 2021-04-26 | 2023-12-29 | 深圳市宏电技术股份有限公司 | MIMO antenna and electronic equipment |
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| WO2016061997A1 (en) | 2016-04-28 |
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