CN102938495A - Built-in multiband antenna - Google Patents
Built-in multiband antenna Download PDFInfo
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- CN102938495A CN102938495A CN2011102345686A CN201110234568A CN102938495A CN 102938495 A CN102938495 A CN 102938495A CN 2011102345686 A CN2011102345686 A CN 2011102345686A CN 201110234568 A CN201110234568 A CN 201110234568A CN 102938495 A CN102938495 A CN 102938495A
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Abstract
The invention discloses a built-in multiband antenna. The built-in multiband antenna comprises a grounding portion which is arranged on one side, a radiation portion which is arranged on the other side, a connection portion which is arranged between the grounding portion and the radiation portion and a capacitance resonant piece which can be resonated with the radiation portion, wherein the radiation portion is in a bent unclosed rectangular shape. The capacitance resonant piece is arranged on the grounding portion, the bandwidth of the antenna can be expanded effectively, the antenna can meet working bandwidth requirements from 2.5th generation Global System for Mobile Communication (GSM) to fourth generation mobile communication long-term evolution (LTE), the radiation efficiency of the antenna is improved, the occupying area of the antenna can be effectively reduced through the bent rectangular radiation portion and the antenna is suitable to requirements of mobile communication device miniaturization trend.
Description
Technical field
The present invention relates to field of wireless communication, relate in particular to a kind of multifrequency antenna that is built in wireless telecommunications system.
Background technology
Antenna is used for launching or receives radio wave to transmit or the exchange radio signal, and it plays vital effect concerning wireless telecommunications system.Along with the development of wireless communication technique, mobile communication equipment present trend toward miniaturization because that built-in aerial has is not fragile, to advantages such as human body radiation are little and attractive in appearance, generally adopted by the Antenna Design person at present.
In the prior art, disclose US 2004/0066334A1 number such as U.S.'s patent of invention and disclose a kind of built-in planar inverted-F antenna (Planar Inverted-F Antenna, be called for short PIFA), this planar inverted-F antenna comprises a coupling assembling, a planar radiation assembly and a plane grounding assembly, the shape of coupling assembling is similar to " ㄣ ", end points is coupled to a feed-in line on it, in order to signal is fed into the planar radiation assembly.Described planar radiation assembly has the short different radiation arm of two segment lengths, is used for respectively high and low frequency.Yet, those of ordinary skills all know, the radiant body path of antenna needs greater than or approximates 1/4th of the defeated or wavelength of radio wave that receives of tendency to develop, in the case, described planar radiation assembly can take the area of plane of certain size, cause the shared area of multifrequency antenna of conventional planar formula effectively to reduce, be difficult to adapt to the requirement of miniaturization of taking up room.
For addressing the above problem, prior art has disclosed again a kind of built-in three-dimensional dual-band antenna, and it includes a feed-in assembly; One first opening shape radiant body; Be coupled to this feed-in assembly, this first opening shape radiant body forms first opening towards this feed-in assembly; One second opening shape radiant body is coupled to this feed-in assembly, and this second opening shape radiant body forms second opening towards this first opening; One grounding assembly is coupled to a ground end; And a coupling assembling, be coupled between this feed-in assembly and this grounding assembly.This stereoscopic antenna has effectively dwindled taking up room of antenna by the back-shaped structure of bending of described the first opening shape radiant body and the second opening shape radiant body.Yet three-dimensional dual-band antenna of the prior art only can work in 2.4GHz and two frequency ranges of 5GHz, can not satisfy the wide band requirement of mobile communication equipment.
In view of the defective of above prior art, therefore, necessary antenna of the prior art is improved, to remedy the deficiencies in the prior art or defective.
Summary of the invention
The purpose of this invention is to provide a kind of built-in multifrequency antenna, it is by improved antenna structure, increase by a relatively large margin the radiation bandwidth of antenna, and then having improved the radiation efficiency of antenna, the frequency band of antenna can cover from GSM to LTE, has effectively enlarged the range of application of antenna, meet the trend of industry development, and whole antenna size is little, occupies little space, and adapts to the trend of Wireless Telecom Equipment miniaturization.
For reaching above-mentioned purpose, the invention provides a kind of built-in multifrequency antenna, it comprises at the grounding parts of a side, at Department of Radiation and the connecting portion between described grounding parts and Department of Radiation of opposite side, described Department of Radiation is the not closed rectangular of bending, described built-in multifrequency antenna also comprise can with the capacitor resonance sheet of described Department of Radiation resonance.
Further, described capacitor resonance sheet comprises from the convergence part that described grounding parts extends and the capacitor resonance main body that extends to form from the convergence part one, and the area of described convergence part is far smaller than the area of capacitor resonance main body.
Further, the convergence part of described capacitor resonance sheet is provided with antenna feed point.
Further, be formed with the gap between the formed public bottom surface of described capacitor resonance sheet and described Department of Radiation and connecting portion.
Further, described Department of Radiation comprises two radiation arms that all substantially are respectively " recessed " type through twice bending, and " recessed " type opening of described two radiation arms is relative.
Further, two radiation arms of described Department of Radiation comprise respectively at least three radiation arm sections, and each radiation arm section has different width.
Optionally, described built-in multifrequency antenna also comprises the supporter that is supported between described Department of Radiation and the grounding parts, and the part of the part of described Department of Radiation, connecting portion, capacitor resonance sheet and grounding parts is on the same sidewall of described supporter.
Compared with prior art, the present invention has the following advantages:
The built-in multifrequency antenna of the present invention has effectively been expanded the frequency bandwidth of antenna by the capacitor resonance sheet being set on grounding parts, and whole antenna can satisfy from the working band requirement of GSM to the four third-generation mobile communication LTE in 2 five generations; And improved the radiation efficiency of antenna, in addition, the general rectangular Department of Radiation of bending can effectively reduce taking up room of antenna, adapts to the requirement of mobile communication equipment trend toward miniaturization.
Description of drawings
Fig. 1 is the front schematic perspective view of built-in multifrequency antenna of the present invention.
Fig. 2 is that built-in multifrequency antenna of the present invention removes supporter and gets the front schematic perspective view among Fig. 1.
Fig. 3 is another angle schematic diagram of Fig. 2.
Fig. 4 is the return loss plot of the built-in multifrequency antenna of the present invention.
Fig. 5 is the efficiency test figure of the built-in multifrequency antenna of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can more be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Set forth detail in the following description so that fully understand the present invention.But the present invention can be different from alternate manner described here and implements with multiple, and those skilled in the art can be in the situation that do similar popularization without prejudice to intension of the present invention.Therefore the present invention is not subjected to the restriction of following public embodiment, include supporter such as describing built-in multifrequency antenna of the present invention among the embodiment hereinafter, yet should be clear and definite, supporter and nonessential among the embodiment, whether those skilled in the art can determine according to the intensity of selected antenna material needs.In addition, embodiments of the present invention are defined as built-in, and certainly when being necessary, those skilled in the art do not need creative work just built-in multifrequency antenna of the present invention can be applied to the outside of Wireless Telecom Equipment.
As shown in Figure 1 to Figure 3, it is the schematic perspective view of the built-in multifrequency antenna 100 of the present invention, and this built-in multifrequency antenna 100 can be applicable to mobile phone, notebook computer or desktop computer, set-top box (Set Top Box), e-book, multimedia player and other needs the portable terminal of wireless transmission high-speed data.Described built-in multifrequency antenna 100 comprises grounding parts 1 in a side, in the aerial radiation section 2 of opposite side, between described grounding parts 1 and the Department of Radiation 2 and the capacitor resonance sheet 4 that extends to Department of Radiation 2 with the connecting portion 3 of the two electric connection, from described grounding parts 1 and be supported in supporter 5 between described Department of Radiation 2 and the grounding parts 1.Described grounding parts 1, Department of Radiation 2, connecting portion 3 and capacitor resonance sheet 4 form by the sheet metal cutting, its common body that consists of described built-in multifrequency antenna 100, described supporter 5 is supported in the body of described built-in multifrequency antenna 100, this supporter 5 substantially rectangular bulk prevents the antenna bulk deformation to strengthen the intensity of antenna body.Certainly, when antenna body has sufficient intensity, also can not adopt supporter 5 to support.
See also Fig. 2 and Fig. 3, described Department of Radiation 2 is overlooked and substantially is not closed rectangular structure, and namely Department of Radiation 2 is formed with opening 20 in outermost long limit, and these opening 20 length are 5mm.Described Department of Radiation 2 comprises the first radiation arm 21 and the second radiation arm 22, described the first radiation arm 21 and the second radiation arm 22 are all distinguished substantially " recessed " type by twice bending, and " recessed " type opening of described two radiation arms is relative, leaves the gap between the free terminal of described the first radiation arm 21 and the second radiation arm 22 and forms described opening 20.Described the first radiation arm 21 entire length are 47mm, and it comprises the M1 section, vertically bends the M2 section of extension and three the arm sections of M3 section that vertically bend extension and parallel extension with described M1 section from the M2 section from M1 section one end.Described the second radiation arm 22 entire length are 66mm, the M6 section that it comprises the M4 section of extending from the other end of the M1 section of the first radiation arm 21, vertically bends the M5 section of extension and vertically bend extension from described M5 section from described M4 section.The equal in length of described M5 section and M2 section, and the length of the two all is far smaller than other sections and as the broadside of whole rectangular radiation section 2.Can obviously be found out by Fig. 2, each radiant section of two radiation arms of described Department of Radiation 2 all has different width, especially the M4 of the second radiation arm 22 and its width of M5 radiant section are more much smaller than the width of other radiant sections of Department of Radiation 2, and so setting can be played the input impedance of the whole built-in multifrequency antenna 100 of fine setting and the effect of frequency.
As shown in Figures 2 and 3, described grounding parts 1 is L-shaped, and it comprises vertical extended surface 11 and horizontal-extending face 12, and its vertical extended surface 11 parallels with each radiation arm of described Department of Radiation 2.
Described connecting portion 3 is inverted L shape substantially, it comprises horizontal-extending arm 31 and the vertical adjutage 32 that extends to form from described horizontal-extending arm 31 bendings, described vertical adjutage 32 1 ends are connected in the vertical extended surface 11 of described grounding parts 1, one end of described horizontal-extending arm 31 then is connected in wider excessive section (the not label) that the M4 section joining place of the M1 section of the first radiation arm 21 of described Department of Radiation 2 and the second radiation arm 22 forms, described connecting portion 3 parallels with Department of Radiation 2, and in conjunction with Fig. 1 and Fig. 2 as seen, described connecting portion 3 all is positioned on the same sidewall of described supporter 5 with the M1 section of described Department of Radiation 2 and the vertical extended surface 11 of M4 section and capacitor resonance sheet 4 and grounding parts 1.The M3 section of Department of Radiation 2 and M6 section then are positioned on another sidewall of supporter 5.
Described capacitor resonance sheet 4 is formed at the vertical extended surface 11 of grounding parts 1.It comprises that the convergence part 42 that is formed at the vertical extended surface 11 of described grounding parts reaches from the convergence part the 42 capacitor resonance main bodys 41 that extend to form.Whole capacitor resonance sheet 4 is flag-like, and namely the area of described convergence part 42 is far smaller than the area of capacitor resonance main body 41.So setting can improve the efficient of resonance.High-visible such as Fig. 2, forming width between the changeover portion of the M1 section of described capacitor resonance sheet 4 and described Department of Radiation 2 and the horizontal-extending arm of the connecting portion 3 31 formed public bottom surfaces is the gap S of 0.5mm.The size in this gap has determined the work quality of whole built-in multifrequency antenna 100 to a great extent.Described convergence part 42 is provided with antenna feed point Q, is used for the welding of external signal line (not shown).The effect of described capacitor resonance sheet 4 is, when signal feed antenna feedback point Q, consist of electric capacity because forming gap S between the capacitor resonance sheet 4 of described metal material and the described Department of Radiation 2, thereby provide the electric capacity feed of whole aerial radiation section 2, and this capacitor resonance sheet 4 can be according to the frequency characteristic of input signal, utilize twice of antenna in addition repeatedly resonant mode make antenna contain higher operating frequency, when low frequency, increase the bandwidth of whole antenna, and when high frequency, himself then can produce resonance, thereby the working band of whole antenna is expanded to 650MHz to 2170MHz scope, the frequency band of whole antenna can cover from GSM to LTE, effectively enlarge the range of application of antenna, met the trend of industry development.Need to prove, the antenna feed point Q of built-in multifrequency antenna 100 of the present invention be arranged on the capacitor resonance sheet 4 rather than the connecting portion 3 of traditional antenna on, exactly in order to realize above-described spread spectrum resonance and to improve the function of impedance matching.
As shown in Figure 4, it is for the return loss plot of the built-in multifrequency antenna 100 of the present invention, the return loss value that generally adopts according to industry is-6 decibels of standards, really across about 650MHz to 2300MHz, the visible built-in multifrequency antenna 100 of the present invention has effectively increased the bandwidth of antenna to the frequency bandwidth of multifrequency antenna 100 of the present invention; And whole antenna size is 55*10*4mm, occupies little space, and can satisfy Wireless Telecom Equipment miniaturization demand.
As shown in Figure 5, it is for the efficiency test figure of the built-in multifrequency antenna 100 of the present invention, the transverse axis of this figure is frequency parameter, the longitudinal axis is the operating efficiency parameter of antenna, as seen from the figure, built-in multifrequency antenna 100 of the present invention reaches more than 50% in the low-frequency range operating efficiency of 650MHz to 1600MHz, and at the high band of 1600MHz to 2300MHz, operating efficiency reaches more than 60%, is higher than the operating efficiency of existing antenna average 40% far away.
In sum, the built-in multifrequency antenna 100 of the present invention has effectively been expanded the frequency bandwidth of antenna by capacitor resonance sheet 4 being set on grounding parts 1, and whole antenna can satisfy from the working band requirement of GSM to the four third-generation mobile communication LTE in 2 five generations; And improved the radiation efficiency of antenna, in addition, the general rectangular Department of Radiation 2 of bending can effectively reduce taking up room of antenna, adapts to the requirement of mobile communication equipment trend toward miniaturization.Other advantage of multifrequency antenna 100 of the present invention repeats no more again, specifically joins beneficial effect or the effect of specification leading portion.
Although the present invention with preferred embodiment openly as above; but it is not to limit the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made possible change and modification; therefore; every content that does not break away from technical solution of the present invention; to any simple modification, equivalent variations and modification that above embodiment does, all belong to the protection range of technical solution of the present invention according to technical spirit of the present invention.
Claims (10)
1. built-in multifrequency antenna, it comprises at the grounding parts of a side, at Department of Radiation and the connecting portion between described grounding parts and Department of Radiation of opposite side, described Department of Radiation is the not closed rectangular of bending, it is characterized in that, described built-in multifrequency antenna also comprise can with the capacitor resonance sheet of described Department of Radiation resonance.
2. built-in multifrequency antenna according to claim 1, it is characterized in that, described capacitor resonance sheet comprises from the convergence part that described grounding parts extends and the capacitor resonance main body that extends to form from the convergence part one, and the area of described convergence part is far smaller than the area of capacitor resonance main body.
3. built-in multifrequency antenna according to claim 2 is characterized in that, the convergence part of described capacitor resonance sheet is provided with antenna feed point.
4. built-in multifrequency antenna according to claim 3 is characterized in that, described capacitor resonance sheet and described Department of Radiation and connecting portion are formed with the gap between the formed public bottom surface.
5. built-in multifrequency antenna according to claim 4 is characterized in that, described Department of Radiation comprises two radiation arms that all substantially are respectively " recessed " type through twice bending, and " recessed " type opening of described two radiation arms is relative.
6. built-in multifrequency antenna according to claim 5 is characterized in that, two radiation arms of described Department of Radiation comprise respectively at least three radiation arm sections, and each radiation arm section has different width.
7. each described built-in multifrequency antenna in 6 according to claim 1, it is characterized in that, described built-in multifrequency antenna also comprises the supporter that is supported between described Department of Radiation and the grounding parts, and the part of the part of described Department of Radiation, connecting portion, capacitor resonance sheet and grounding parts is on the same sidewall of described supporter.
8. built-in multifrequency antenna, it comprises at the grounding parts of a side, at Department of Radiation and the connecting portion between described grounding parts and Department of Radiation of opposite side, described connecting portion and Department of Radiation connection form excessive section, described changeover portion and connecting portion share a public bottom surface, it is characterized in that, described built-in multifrequency antenna comprises is separated by gapped with described public bottom surface and then cooperates a capacitor resonance sheet that forms capacitance structure with described Department of Radiation.
9. built-in multifrequency antenna according to claim 8, it is characterized in that, described capacitor resonance sheet comprises from the convergence part that described grounding parts extends and the capacitor resonance main body that extends to form from the convergence part one, and the area of described convergence part is far smaller than the area of capacitor resonance main body and is flag-like.
10. built-in multifrequency antenna according to claim 8, it is characterized in that, described Department of Radiation comprises two radiation arms that all substantially are respectively " recessed " type through twice bending, and " recessed " type opening of described two radiation arms is relative, and each radiation arm has different width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102345686A CN102938495A (en) | 2011-08-16 | 2011-08-16 | Built-in multiband antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102345686A CN102938495A (en) | 2011-08-16 | 2011-08-16 | Built-in multiband antenna |
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| CN102938495A true CN102938495A (en) | 2013-02-20 |
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| CN2011102345686A Pending CN102938495A (en) | 2011-08-16 | 2011-08-16 | Built-in multiband antenna |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241818A (en) * | 2013-06-24 | 2014-12-24 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device applying same |
| CN105470633A (en) * | 2014-09-11 | 2016-04-06 | 深圳市六二九科技有限公司 | 2G, 3G and 4G integrated multi-frequency antennae and wireless communication terminal |
| CN109584443A (en) * | 2018-11-23 | 2019-04-05 | 北京易植科技有限公司 | Fresh flower vending machine and its control method based on RFID static state Stocktaking mode |
| CN113964501A (en) * | 2021-11-22 | 2022-01-21 | 江西创新科技有限公司 | Novel 5G communication antenna |
| CN116315630A (en) * | 2023-03-01 | 2023-06-23 | 东莞市猎声电子科技有限公司 | U-shaped antenna |
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| GB2366916A (en) * | 2000-07-19 | 2002-03-20 | Matsushita Electric Ind Co Ltd | Folded loop antenna for portable radio device |
| TW563274B (en) * | 2002-10-08 | 2003-11-21 | Wistron Neweb Corp | Dual-band antenna |
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| CN101582534A (en) * | 2008-05-12 | 2009-11-18 | 宏碁股份有限公司 | Capacitance coupling multi-frequency annular antenna |
| CN102075205A (en) * | 2009-11-24 | 2011-05-25 | 财团法人工业技术研究院 | Mobile communication device |
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2011
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Patent Citations (5)
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| GB2366916A (en) * | 2000-07-19 | 2002-03-20 | Matsushita Electric Ind Co Ltd | Folded loop antenna for portable radio device |
| TW563274B (en) * | 2002-10-08 | 2003-11-21 | Wistron Neweb Corp | Dual-band antenna |
| CN101017926A (en) * | 2006-02-10 | 2007-08-15 | 株式会社卡西欧日立移动通信 | Antenna apparatus |
| CN101582534A (en) * | 2008-05-12 | 2009-11-18 | 宏碁股份有限公司 | Capacitance coupling multi-frequency annular antenna |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241818A (en) * | 2013-06-24 | 2014-12-24 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device applying same |
| CN104241818B (en) * | 2013-06-24 | 2019-07-12 | 深圳富泰宏精密工业有限公司 | The wireless communication device of antenna structure and the application antenna structure |
| CN105470633A (en) * | 2014-09-11 | 2016-04-06 | 深圳市六二九科技有限公司 | 2G, 3G and 4G integrated multi-frequency antennae and wireless communication terminal |
| CN105470633B (en) * | 2014-09-11 | 2019-04-05 | 深圳市六二九科技有限公司 | 2G, 3G, 4G integrate multifrequency antenna and wireless communication terminal |
| CN109584443A (en) * | 2018-11-23 | 2019-04-05 | 北京易植科技有限公司 | Fresh flower vending machine and its control method based on RFID static state Stocktaking mode |
| CN113964501A (en) * | 2021-11-22 | 2022-01-21 | 江西创新科技有限公司 | Novel 5G communication antenna |
| CN116315630A (en) * | 2023-03-01 | 2023-06-23 | 东莞市猎声电子科技有限公司 | U-shaped antenna |
| CN116315630B (en) * | 2023-03-01 | 2024-03-19 | 东莞市猎声电子科技有限公司 | U-shaped antenna |
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Application publication date: 20130220 |