CN102790267A - Broadband wireless data card antenna - Google Patents
Broadband wireless data card antenna Download PDFInfo
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- CN102790267A CN102790267A CN2012102578356A CN201210257835A CN102790267A CN 102790267 A CN102790267 A CN 102790267A CN 2012102578356 A CN2012102578356 A CN 2012102578356A CN 201210257835 A CN201210257835 A CN 201210257835A CN 102790267 A CN102790267 A CN 102790267A
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Abstract
The invention relates to a broadband wireless data card antenna, which is characterized in that antenna cabling and a metal floor collectively form an antenna radiation system, the antenna cabling is directly printed or welded on one surface of a wireless data card main board, and the metal floor is printed on the other surface of the wireless data card main board. The metal corresponding to the orthographic projection area of the antenna cabling on the metal floor is completely hollowed, so that a semi-closed metal-free area is formed on the metal floor, and since a patch of the antenna cabling and the metal floor are respectively arranged on two surfaces of the wireless data card main board, a coupling clearance is conveniently formed between the patch and the metal floor. The clearance coupling between the antenna cabling and the metal floor can play a role of distributive capacitance; and meanwhile, a narrow band in the antenna cabling can play a role of distributive inductance, and the input impedance of the antenna can be effectively adjusted, so that the antenna produces resonance within a needed frequency band to form a wider bandwidth.
Description
Technical field
The invention belongs to a kind of antenna of wireless mobile apparatus technical field, relate in particular to the data card antenna technology.
Background technology
Along with the continuous development of global 3G communication network, wireless telecommunications and transfer of data have become the important way that people use new science and technology.The wireless data card that is loaded with antenna has advantages such as transmission speed is fast, easy to use and online whenever and wherever possible as a kind of wireless Internet access mode, therefore, in the market in future, the wireless device configuration wireless data card trend that is inevitable.Antenna directly influences the transmitting-receiving performance of wireless device as the important component part of wireless data card.At present, realize that the challenge of wireless data card antenna is, need in less space, realize the antenna in the multiband/broadband of low SAR (Specific Absorption Rate, specific absorption rate) value radiation.
In general, the frequency range of wireless mobile communications is formed (the low-frequency range scope is 698-960MHz, and high band range is 1710-2690MHz) by low frequency and two communications bands of high frequency.Wherein the input impedance of antenna can be expressed as: Zin=R+jwL-1/jwC, and wherein, R representes resistance, and jwL representes induction reactance, and 1/jwC is capacitive reactance.The equivalent contrary sign of induction reactance in input impedance and capacitive reactance, when promptly the input impedance of antenna was pure resistive, antenna had just reached resonance condition.Antenna produces resonance and explains that promptly antenna can form good coupling in this frequency range in a certain frequency range, electromagnetic field energy just can not be stored like this, but forms effective eradiation.
Now; On the data card antenna design form, extensively adopt monopole (Monopole), inverse-F antenna (Inverted-FAntenna, IFA) and planar inverted-F antenna (Planar Inverted-F Antenna; Built-in antenna such as PIFA); The antenna operated by rotary motion of these forms is at the end of data card, by the data card mainboard as antenna " ", antenna with " " form radiator jointly.Yet the antenna bandwidth of operation of above-mentioned design is all narrower, is difficult to satisfy growing bandwidth demand.
The electromagnetic radiation that produces during wireless data card work also gets more and more people's extensive concerning to user's influence.This requires wireless data card will in less space, realize the antenna of low SAR value radiation.In the existing low SAR antenna technology scheme, often adopt novel high-permeability material to make antenna, to improve the proportion of magnetic field energy in the data card antenna near field as far as possible; Reduce the proportion of electric field energy in the near field; Thereby realize the purpose of the low SAR value of antenna, yet, because the characteristics of the polytropy of the complexity of wireless data card antenna structure and environment for use; Often cause such scheme to lose efficacy, and cost is higher.Also some antenna only reaches the purpose of controlling the SAR value through reducing radiant power simply when design, the transmission characteristic and the communication performance of this way meeting appreciable impact antenna.
Summary of the invention
Technical problem to be solved by this invention is, a kind of built-in wireless data card antenna is provided, and can on the small size of wireless data card, obtain the bandwidth of operation of broad and lower SAR value.
The present invention solves the problems of the technologies described above the technological means that is adopted to be; A kind of broadband wireless data card antenna; Comprise antenna cabling, metal ground and microstrip feed line; Said antenna cabling and microstrip feed line are arranged on the one side of said data card mainboard, are arranged on the another side of said data card mainboard said metal; In said metal ground, be provided with a semi-enclosed no metallic region, no metallic region comprises the corresponding region on the plane, place, antenna cabling orthographic projection to metal ground;
Said antenna cabling comprises connecting band, paster, fillet band, lumped capacity; Fillet band one end is connected through metal ground one side of the metallization via hole on the data card mainboard with the interface of contiguous wireless data card, in the other end connection paster away from one side of the interface of wireless data card; Said connecting band one end connects microstrip feed line, and the orthographic projection of microstrip feed line is in the metal ground side away from the interface of wireless data card, in the other end connection paster of connecting band away from one side of the interface of wireless data card;
Said lumped capacity is arranged in the fillet band;
Said microstrip feed line has encouraged high-frequency current to antenna cabling feed on said antenna cabling; Spatially there are the coupling slit in said paster and said metal ground, and play metal high-frequency current formation resonance on the ground through coupling excitation; The capacitive reactance that induction reactance that said fillet band produces on low-frequency range and the lumped capacity in the fillet band produce on low-frequency range offsets, and on low-frequency range, forms resonance.
Because antenna is a complete radiating system, each part wherein all has certain influence to the generation and the bandwidth covering of low-frequency range and high band resonances point.Among the present invention, the antenna cabling becomes the aerial radiation system with metal ground mutual group, and the antenna cabling is directly printed or is welded on the one side of wireless data card mainboard, is printed on the another side of wireless data card mainboard metal.The metal in metal respective antenna cabling orthographic projection on the ground zone is all hollowed out; Then form a semi-enclosed no metallic region on the ground at metal; Owing to be separately positioned on two faces of wireless data card mainboard the paster of antenna cabling and metal, between paster and metal ground, just formed the coupling slit like this.The effect that slit coupling energy between antenna cabling and the metal ground presents distributed capacitor; Simultaneously; Fillet band in the antenna cabling can present the effect of distributed inductance, can effectively regulate the input impedance of antenna, thereby makes antenna in required frequency range, produce the bandwidth that resonance forms broad.
Among the present invention, the high band resonances of antenna is mainly produced by the coupling between paster and paster and the metal ground, and the low band resonance of antenna is mainly produced by the fillet band that loads lumped capacity.The antenna cabling carries out feed through microstrip feed line; The capacitive coupling in coupling slit can encourage metal high-frequency current on the ground; And thereby the input impedance of adjustable antenna makes antenna form a plurality of resonance points at high band, and then on high band, forms the resonant bandwidth of broad.Fillet band one end is connected with metal ground through the metallization via hole on the data card mainboard; The other end connects paster; The fillet band presents the effect of distributed inductance; And the capacitive character lamped element that in the fillet band, is provided with can make antenna on low-frequency range, form good coupling and produce resonance, thereby on low-frequency range, forms the resonant bandwidth of broad.Position and the shape of fillet band on the data card mainboard is adjustable; Through changing the fillet band with respect to the position on paster and metal ground and the shape of fillet band; Can change the distribution of antenna cabling and metal high-frequency current on the ground; Thereby can change the distribution of electromagnetic energy in the antenna, reach the effect of regulating the impedance matching adjustment beamwidth of antenna.In addition, the parameter value of lumped capacity and loading position also can be regulated the impedance of antenna in the fillet band.
The present invention uses the slit coupled mode, can let electromagnetic field energy be scattered in the long slit, and this more helps to reduce the concentrated distribution of energy of electromagnetic field, reduces the electric field power that tissue absorbed, and reduces the SAR value.And; Because the effect that the fillet band in the antenna cabling presents distributed inductance is compared and used the lumped inductance element, the fillet band has the advantage that size is big, internal current density is little and ohmic loss is little; Therefore more help electromagnetic field to external radiation, thereby can improve the bandwidth and the efficient of antenna.
Further,, make in required frequency range internal impedance coupling better, between said microstrip feed line and said connecting band, also be provided with matching network for the bandwidth of further optimization antenna.Concrete; Said matching network is lumped inductance, lumped capacity or lumped inductance and lumped capacity string and/or combination also; Matching network is used to make antenna in using frequency range, to produce good impedance matching, thereby makes antenna in required frequency range, produce resonance.
Further; The antenna cabling is arranged at the interface near wireless data card; The interface of wireless data card can be USB interface or other electronic equipment interfaces; Wireless data card is to be inserted on the wireless device in use, can the electric field energy of antenna be distributed to like this on the wireless device at wireless data card place.
The invention has the beneficial effects as follows, on the little space of wireless data card mainboard, obtain wideer bandwidth of operation, improve antenna efficiency, reduce the SAR value.
Description of drawings
Fig. 1 is embodiment 1 a wireless data card perspective view;
Fig. 2 a is the subsurface sketch map of embodiment 1 wireless data card;
Fig. 2 b is the perspective elevation of embodiment 1 wireless data card;
Fig. 2 c is the last aspect sketch map of embodiment 1 wireless data card;
Fig. 3 is embodiment 2 wireless data card perspective views;
Fig. 4 a is the subsurface sketch map of embodiment 2 wireless data cards;
Fig. 4 b is the perspective elevation of embodiment 2 wireless data cards;
Fig. 4 c is the last aspect sketch map of embodiment 2 wireless data cards;
Embodiment
As shown in Figure 1, wireless data card comprises data card mainboard 1, usb 10.Usb 10 is used for being connected of wireless data card and wireless device.Shown in Fig. 2 a, 2c; Aerial radiation system on the data card mainboard 1 is distributed on two faces of data card mainboard 1 and (goes up aspect, subsurface); The antenna cabling is arranged on the last aspect of data card mainboard 1; The antenna cabling comprises paster 3, fillet band 4 and the connecting band 5 that links together, and metal ground 2 is arranged on the subsurface of data card mainboard 1, and being provided with of two faces is as shown in Figure 2.Shown in Fig. 2 c, also be loaded with lumped capacity 6 on the fillet band 4 of last aspect, connecting band 5 connects 50 ohm microstrip feeder lines 7.Shown in Fig. 2 b, no metallic region 8 comprises the orthographic projection zone of antenna cabling on subsurface of aspect.Shown in Fig. 2 a, many limits of no metallic region 8 are surrounded by metal ground 2 and form a semiclosed zone.
By shown in Figure 1, antenna cabling zone is positioned on the data card mainboard 1 end near usb 10 or other electronic equipment interfaces.The shape of antenna cabling zone and no metallic region 8 can be any regular or irregular shapes such as rectangle, rhombus, trapezoidal, triangle, polygon, is not limited to the shape shown in the embodiment.The shape of antenna cabling zone and no metallic region 8 does not need identical yet, only need guarantee that the orthographic projection in antenna cabling zone is comprised in no metallic region 8 interior getting final product.
Being shaped as of paster 3 in the antenna cabling of present embodiment and fillet band 4 is L shaped; Connecting band 5 is the straight line band; But; The shape of paster 3, fillet band 4 and connecting band 5 also can be for except other planar structure shapes the shape shown in the embodiment, and are width bonding jumper even or heterogeneous or band, and its concrete shape will correspondingly be adjusted according to the result of reality debugging.
Connecting band 5 one ends connect microstrip feed line 7, and the orthographic projection of microstrip feed line 7 is in metal ground 2 one sides away from the interface of wireless data card, in the other end connection paster 3 of connecting band 5 away from one side of the interface of wireless data card.The 50 ohm microstrip feeder lines 7 that connect radiofrequency signal have encouraged high-frequency current to antenna cabling feed on the antenna cabling.
Because paster 3 is separately positioned on two faces of wireless data card mainboard 1 with metal ground 2, between paster 3 and metal ground 2, has just formed coupling of the present invention slit 9 like this.The coupling slit 9 the capacitive coupling can encourage the high-frequency current on the metal ground 2, thereby and the input impedance of adjustable antenna make antenna on high band, form a plurality of resonance points.
Shown in Fig. 2 b, the fillet band 4 in the antenna cabling is arranged on the last aspect between paster 3 and no metallic region 8 edges.Fillet band 4 also can be arranged on other correct position on the data card mainboard.Because the fillet band needs certain length; Therefore; The correct position of fillet band 4 need satisfy: fillet band one end is connected through metal ground 2 one sides of the metallization via hole on the data card mainboard with the interface of contiguous wireless data card, in other end connection and the paster 3 away from one side of the interface of wireless data card; One end of fillet band 4 connects paster 3, and the other end is connected with metal ground 2 through the metallization via hole on the data card mainboard 1.Lumped capacity 6 can be arranged at an end of fillet band 4 ground connection.The loading position of lumped capacity 6 can be adjusted according to the correct position of debug results on fillet band 4 of reality.Fillet band 4 presents the effect of distributed inductance, can make antenna on low-frequency range, reach coupling effectively and load lumped capacity 6, thereby forms the resonant bandwidth of broad.
Because antenna is a complete radiating system, each part wherein all has certain influence to the generation and the bandwidth covering of low frequency and high-frequency resonant point.In the present embodiment, the high-frequency resonant of antenna is mainly produced by the coupling between paster 3 and paster 3 and the metal ground 2, and the low-frequency resonant of antenna is mainly produced by the fillet band that loads lumped capacity 64.
During realization; Through optimizing shape, size and the relative position of fillet band 3, paster 4 and connecting band 5 in the antenna cabling; Optimize the size in the coupling slit 9 between metal ground 2 and the antenna cabling; And parameter value and loading position through adjustment lumped capacity 6, the resonance characteristic that can regulate antenna, and finally reach complete coverage goal bandwidth, reduce the Antenna Design requirement of SAR value.
It is the another kind of antenna form with embodiment 1 same principle.
As shown in Figure 3, wireless data card comprises data card mainboard 1, usb 10.Usb 10 is used for being connected of wireless data card and wireless device.Shown in Fig. 4 a, 4c; Aerial radiation system on the data card mainboard 1 is distributed on two faces of data card mainboard 1 and (goes up aspect, subsurface); The antenna cabling is arranged on the last aspect of data card mainboard 1; The antenna cabling comprises paster 3, fillet band 4 and the connecting band 5 that links together, and metal ground 2 is arranged on the subsurface of data card mainboard 1, and being provided with of two faces is as shown in Figure 4.Shown in Fig. 4 c, also be loaded with lumped capacity 6 on the fillet band 4 of last aspect, connecting band 5 connects 50 ohm microstrip feeder lines 7.Shown in Fig. 4 b, no metallic region 8 comprises the orthographic projection zone of antenna cabling on subsurface of aspect.Shown in Fig. 4 a, many limits of no metallic region 8 are surrounded by metal ground 2 and form a semiclosed zone.
Shown in Fig. 4 b, the fillet band 4 in the antenna cabling is arranged on no metallic region 8 not by on the last aspect of metal ground 2 sealings one side.Fillet band 4 also can be arranged on other orthographic projection and be comprised on the last aspect in the no metallic region 8.Paster 3, fillet band 4 and connecting band 5 are width bonding jumper even or heterogeneous or band, and shape also can be for thinking other planar structure shapes except shape shown in the embodiment, and its concrete shape will correspondingly be adjusted according to the result of reality debugging.
Between 50 ohm microstrip feeder lines 7 and connecting band 5, also be provided with matching network 11, be used for regulating the input impedance on the antenna whole frequency band, make antenna in required frequency range, produce resonance.Matching network 11 can be made up of in inductance and/or the electric capacity, perhaps, and the inductance of several number, the string of electric capacity and/or combination also.
The above person; Be merely preferred embodiment of the present invention; When not limiting the scope that the present invention implements with this, the simple equivalent of promptly being done according to claim of the present invention and description of the invention content generally changes and modifies, and all should still belong in the scope that patent of the present invention contains.
Claims (6)
1. a broadband wireless data card antenna comprises antenna cabling, metal ground and microstrip feed line, and said antenna cabling and microstrip feed line are arranged on the one side of said data card mainboard, is arranged on the another side of said data card mainboard said metal; In said metal ground, be provided with a semi-enclosed no metallic region, no metallic region comprises the corresponding region on the plane, place, antenna cabling orthographic projection to metal ground;
It is characterized in that,
Said antenna cabling comprises connecting band, paster, fillet band, lumped capacity; Fillet band one end is connected through metal ground one side of the metallization via hole on the data card mainboard with the interface of contiguous wireless data card, in the other end connection paster away from one side of the interface of wireless data card; Said connecting band one end connects microstrip feed line, and the orthographic projection of microstrip feed line is in the metal ground side away from the interface of wireless data card, in the other end connection paster of connecting band away from one side of the interface of wireless data card;
Said lumped capacity is arranged in the fillet band;
Said microstrip feed line has encouraged high-frequency current to antenna cabling feed on said antenna cabling; Spatially there are the coupling slit in said paster and said metal ground, and play metal high-frequency current formation resonance on the ground through coupling excitation; The capacitive reactance that induction reactance that said fillet band produces on low-frequency range and the lumped capacity in the fillet band produce on low-frequency range offsets, and on low-frequency range, forms resonance.
2. a kind of according to claim 1 broadband wireless data card antenna is characterized in that, said fillet band is width bonding jumper even or heterogeneous or sheet.
3. a kind of according to claim 1 broadband wireless data card antenna is characterized in that, between said microstrip feed line and said connecting band, also is provided with matching network.
4. like the said a kind of broadband wireless data card antenna of claim 3; It is characterized in that; Said matching network is lumped inductance, lumped capacity or lumped inductance and lumped capacity string and/or combination also, and capacitive reactance and induction reactance that matching network is used to make antenna in using frequency range, produce offset.
5. a kind of according to claim 1 broadband wireless data card antenna is characterized in that said antenna cabling is arranged at the interface near wireless data card.
6. a kind of according to claim 1 broadband wireless data card antenna is characterized in that said antenna cabling directly prints or is welded on the one side of wireless data card printed circuit board (PCB).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102578356A CN102790267A (en) | 2012-07-25 | 2012-07-25 | Broadband wireless data card antenna |
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| CN2012102578356A CN102790267A (en) | 2012-07-25 | 2012-07-25 | Broadband wireless data card antenna |
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| CN102790267A true CN102790267A (en) | 2012-11-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015085567A1 (en) * | 2013-12-13 | 2015-06-18 | 华为终端有限公司 | Slot-coupling printed antenna |
| CN105958190A (en) * | 2016-04-25 | 2016-09-21 | 上海安费诺永亿通讯电子有限公司 | Balanced differential feeder antenna and wireless communication device thereof |
| WO2019223727A1 (en) * | 2018-05-23 | 2019-11-28 | 中兴通讯股份有限公司 | Terminal device antenna apparatus and implementation method |
| CN115458897A (en) * | 2022-09-30 | 2022-12-09 | 杭州泛利科技有限公司 | Small high-performance omnidirectional antenna applied to SIP radio frequency module |
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| CN101540433A (en) * | 2009-05-08 | 2009-09-23 | 深圳华为通信技术有限公司 | Antenna design method and data card veneer of wireless terminal |
| CN102354807A (en) * | 2011-06-24 | 2012-02-15 | 电子科技大学 | Broadband universal serial bus (USB) dongle antenna |
| CN101540432B (en) * | 2009-05-08 | 2012-07-04 | 华为终端有限公司 | Antenna design method and data card veneer of wireless terminal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101540433A (en) * | 2009-05-08 | 2009-09-23 | 深圳华为通信技术有限公司 | Antenna design method and data card veneer of wireless terminal |
| CN101540432B (en) * | 2009-05-08 | 2012-07-04 | 华为终端有限公司 | Antenna design method and data card veneer of wireless terminal |
| CN102354807A (en) * | 2011-06-24 | 2012-02-15 | 电子科技大学 | Broadband universal serial bus (USB) dongle antenna |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015085567A1 (en) * | 2013-12-13 | 2015-06-18 | 华为终端有限公司 | Slot-coupling printed antenna |
| CN105958190A (en) * | 2016-04-25 | 2016-09-21 | 上海安费诺永亿通讯电子有限公司 | Balanced differential feeder antenna and wireless communication device thereof |
| CN105958190B (en) * | 2016-04-25 | 2019-05-14 | 上海安费诺永亿通讯电子有限公司 | Balanced differential feed antennas and its wireless telecom equipment |
| WO2019223727A1 (en) * | 2018-05-23 | 2019-11-28 | 中兴通讯股份有限公司 | Terminal device antenna apparatus and implementation method |
| CN110534874A (en) * | 2018-05-23 | 2019-12-03 | 中兴通讯股份有限公司 | A kind of terminal device antenna assembly and implementation method |
| CN115458897A (en) * | 2022-09-30 | 2022-12-09 | 杭州泛利科技有限公司 | Small high-performance omnidirectional antenna applied to SIP radio frequency module |
| CN115458897B (en) * | 2022-09-30 | 2024-05-07 | 杭州泛利科技有限公司 | Be applied to small-size high performance omnidirectional antenna of SIP radio frequency module |
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Application publication date: 20121121 |