CN102683829A - Mobile communication device and antenna structure thereof - Google Patents
Mobile communication device and antenna structure thereof Download PDFInfo
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- CN102683829A CN102683829A CN2011100597273A CN201110059727A CN102683829A CN 102683829 A CN102683829 A CN 102683829A CN 2011100597273 A CN2011100597273 A CN 2011100597273A CN 201110059727 A CN201110059727 A CN 201110059727A CN 102683829 A CN102683829 A CN 102683829A
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Abstract
The invention discloses a mobile communication device, comprising an antenna structure, wherein the antenna structure is provided with a grounding element and an antenna element. The grounding element comprises a main grounding surface and a convex grounding surface; and the convex grounding surface is electrically connected onto an edge of the main grounding surface. The antenna element comprises a feeding part and a radiating part; the feeding part is provided with a feeding point, a first branch and a second branch; the first branch and the second branch are respectively connected to the feeding point; and the opened ends of the first branch and the second branch extend towards the opposite directions. The radiating part is provided with a short-circuit point, a first opened end and a second opened end; and the short-circuit point is electrically connected to the convex grounding surface by a short-circuit line. A first interval of the radiating part comprising the first opened end has a first coupling interval with the first branch; and a second interval of the radiating part comprising the second opened end has a second coupling distance with the second branch.
Description
Technical field
The present invention relates to a kind of mobile communications device and antenna structure thereof, particularly the The built-in multifrequency antenna can be done the mobile communications device and the antenna structure thereof of integration with the ground plane of a configurable external signal transfer element.
Background technology
In recent years because the progress of mobile communication technology; Make mobile communications device must design gently, thin, short, little and attractive in appearance more, the antenna that therefore is applied to mobile communications device just must possess that size is little, Multiband-operation and can do the characteristic of integration with peripheral element.Yet in mobile communications device; For antenna and peripheral element are done integration; Obtain the operation in broadband simultaneously, existing technology is interval with the no ground plane that antenna radiator directly is disposed at system circuit board in the mobile communications device, to reduce the coupling effect between antenna and the ground plane; Provide enough bandwidth of operation to contain the broadband operation of radio wide area network (WWAN, wireless wide area network).But, it is interval that this kind wireless wide area network antennas is disposed at a single no ground plane mostly, tends to reduce the design freedom of mobile communications device inner member.
In the prior art; For instance, like United States Patent (USP) the 7th, 768; 466B2 number " Multiband folded loop antenna " (being with folded coil antenna) promptly disclosed a kind of antenna for mobile phone that occupies three-dimensional space more; Its antenna is exactly to be disposed at the operation that the broadband is reached in a single no ground plane interval, however this kind antenna configurations mode make antenna element can't with the data transmission element in the mobile communications device, like USB (USB; Universal serial bus) joint component is done integration; And effective configuration can't be done in the inner space of causing mobile communications device, and its operational frequency bands fails to contain present Long Term Evolution (LTE, Long Term Evolution) and radio wide area network (WWAN; Wireless Wide Area Network) the eight frequency operation frequency ranges of required LTE700/GSM850/900/1800/1900/UMTS/LTE2300/2500 can't satisfy and contain the demand of all mobile bands at present.
Therefore; Be necessary to provide a kind of mobile communications device; It has two broadband operation frequency bands, contains about 704～960MHz and 1710～2690MHz frequency band at least, to satisfy eight operations frequently of LTE/WWAN; And can antenna and peripheral element be integrated, improve the existing problem of prior art.
Summary of the invention
The object of the present invention is to provide a kind of mobile communications device and antenna structure thereof, to solve the integration between The built-in antenna and data transmission element and to reach the target that contains multi-band operation.
For reaching above-mentioned purpose; A kind of mobile communications device of the present invention comprises an antenna structure, and this antenna structure has earth element and antenna element, and wherein earth element comprises a main ground plane and an outstanding ground plane; Should give prominence to the one edge that ground plane is electrically connected in this main ground plane; And this antenna element is positioned on the medium substrate and comprise a feeding portion and a Department of Radiation, and wherein this feeding portion has a load point, and this load point is electrically connected to a signal source that is positioned on this earth element; This feeding portion has one first branch road and one second branch road; This first branch road and this second branch road all are connected to this load point, and the openend of this first branch road and this second branch road extends towards rightabout, and this feeding portion is on this earth element plane, place and have a projection; This projection comprises the partial section of this outstanding ground plane; And this Department of Radiation has a short dot, and this short dot is electrically connected to this outstanding ground plane by a short-circuit line, and this Department of Radiation has one first openend and one second openend; Partial section and this first branch road that this Department of Radiation comprises this first openend have one first coupling spacing, and partial section and this second branch road that this Department of Radiation comprises this second openend have one second coupling spacing.
For reaching above-mentioned purpose; An antenna structure of the present invention has earth element and antenna element; Wherein earth element comprises a main ground plane and an outstanding ground plane, and this outstanding ground plane is electrically connected in the one edge of this main ground plane, and this antenna element is positioned on the medium substrate and comprise a feeding portion and a Department of Radiation; Wherein this feeding portion has a load point; This load point is electrically connected to a signal source that is positioned on this earth element, and this feeding portion has one first branch road and one second branch road, and this first branch road and this second branch road all are connected to this load point; The openend of this first branch road and this second branch road extends towards rightabout; And this Department of Radiation has a short dot, and this short dot is electrically connected to this outstanding ground plane by a short-circuit line, and this Department of Radiation has one first openend and one second openend; Partial section and this first branch road that this Department of Radiation comprises this first openend have one first coupling spacing, and partial section and this second branch road that this Department of Radiation comprises this second openend have one second coupling spacing.
The invention has the advantages that to utilize Department of Radiation to comprise to have one first coupling spacing between this first branch road of one first section and load point of first openend to go out near a quarter-wave resonance mode (for example the 750MHz), and go out near its high-order frequency multiplication mode (for example the 2700MHz) in high-frequency resonance at low-frequency resonance; Utilize this Department of Radiation to comprise again to have one second coupling spacing between one second section and this second branch road of this second openend and go out near a quarter-wave resonance mode (for example the 1000MHz) at low-frequency resonance; First operational frequency bands of utilizing these two low-frequency resonance mode to come synthetic wideband contains about 704～960MHz at least.In addition; Not isometric path by first branch road and second branch road of this feeding portion; Can respectively produce near near a quarter-wave resonance mode (for example the 1950MHz and the 2300MHz) at high frequency respectively; And with first branch road by near the first high-order frequency multiplication mode (for example the 2700MHz) that resonates out of coupling spacing, second operational frequency bands of synthetic wideband contains about 1710～2690MHz at least.
Description of drawings
Fig. 1 is the structure chart of first embodiment of a kind of mobile communications device of the present invention and antenna structure thereof.
Fig. 2 is the return loss measurement figure of first embodiment of a kind of mobile communications device of the present invention and antenna structure thereof.
Fig. 3 is the structure chart of second embodiment of a kind of mobile communications device of the present invention and antenna structure thereof.
Fig. 4 is the structure chart of the 3rd embodiment of a kind of mobile communications device of the present invention and antenna structure thereof.
Wherein, description of reference numerals is following:
Mobile communications device 1,3,4
Earth element 10
Department of Radiation 14,34
Short dot 141,341
Short-circuit line 142,342
First openend 15
Second openend 16
The first coupling spacing 17
The second coupling spacing 18
External signal transfer element 49
First operational frequency bands 21
Second operational frequency bands 22
Reference axis X, Y, Z
Embodiment
For let above and other objects of the present invention, feature and advantage can be more obviously understandable, the hereinafter spy enumerates specific embodiment of the present invention, and conjunction with figs., elaborates as follows.
In the middle of specification and claims, used some vocabulary to censure specific element.Having common knowledge the knowledgeable in the affiliated field should understand, and hardware manufacturer may be called same element with different nouns.This specification and claims are not used as distinguishing the mode of element with the difference of title, but the criterion that is used as distinguishing with the difference of element on function.Be an open term mentioned " comprising " in the middle of specification and the claim in the whole text, so should be construed to " comprise but be not limited to ".In addition, " couple " speech and comprise any indirect means that are electrically connected that directly reach at this.Therefore, be coupled to one second device, then represent this first device can directly be electrically connected in this second device, or be electrically connected to this second device through other device or the intersegmental ground connection of connection hand if describe one first device in the literary composition.
Fig. 1 is the structure chart of a kind of mobile communications device first embodiment of the present invention.In the present embodiment; Mobile communications device 1 comprises an antenna structure; And this antenna structure comprises an earth element 10 and an antenna element 11; Wherein this earth element 10 comprises a main ground plane 101 and an outstanding ground plane 102, and this outstanding ground plane 102 is electrically connected in the one edge of this main ground plane 101.
In addition, this antenna element 11 is positioned on the medium substrate 12, and comprises a feeding portion 13 and a Department of Radiation 14.This feeding portion 13 has a load point 131, one first branch road 134 and one second branch road 135; Wherein this load point 131 is electrically connected to a signal source 133 that is positioned on this earth element 10 by a metal wire 132; And this first branch road 134 and this second branch road 135 all are connected to this load point 131; The openend of this first branch road 134 and this second branch road 135 extends towards rightabout; Be noted that the length of the length of this first branch road 134 to load point 131 and/or this second branch road 135 to this load point 131 is at least 0.2 times of wavelength of this second operational frequency bands highest frequency.In addition, this feeding portion 13 is on this earth element plane, 10 place and have a projection, and this projection comprises the partial section of this outstanding ground plane 102.This Department of Radiation 14 then comprises a short dot 141, one first openend 15 and one second openend 16 is arranged; Wherein this short dot 141 is electrically connected to this outstanding ground plane 102 by a short-circuit line 142; And this Department of Radiation 14 comprises and has one first coupling spacing 17 between one first section 151 and this first branch road 134 of this first openend 15; This Department of Radiation 14 comprises between one second section 161 and this second branch road 135 of this second openend 16 and then has one second coupling spacing 18, and wherein this first coupling spacing 17 and this second coupling spacing 18 all are less than 2mm.
Please in the lump with reference to figure 2, Fig. 2 is the return loss measurement figure of a kind of mobile communications device first embodiment of the present invention.In the present embodiment; First branch road 134 of this feeding portion 13 excites the metal path that is short-circuited to outstanding ground plane 102 from first openend 15 via short-circuit line 142 by coupling spacing 17; Going out near a quarter-wave resonance mode (for example the 750MHz) at low-frequency resonance, and go out near its high-order frequency multiplication mode (for example the 2700MHz) in high-frequency resonance; Utilize second branch road 135 to excite the metal path that is short-circuited to outstanding ground plane 102 from second openend 16 via short-circuit line 142 by coupling spacing 18 again; To go out near a quarter-wave resonance mode (for example the 1000MHz) at low-frequency resonance; Utilize these two low-frequency resonance mode to come first operational frequency bands of synthetic wideband (first operational frequency bands 21 as shown in Figure 2), contain about 704～960MHz at least.In addition; Not isometric path by first branch road 134 and second branch road 135 of this feeding portion 13; Can respectively produce near near a quarter-wave resonance mode (for example the 1950MHz and the 2300MHz) at high frequency respectively; And excite near the high-order frequency multiplication mode (for example the 2700MHz) that is short-circuited to the resonance path of outstanding ground plane 102 by first openend 15 via short-circuit line 142 by the first coupling spacing 17 with first branch road 134; Second operational frequency bands of synthetic wideband (second operational frequency bands 22 as shown in Figure 2) contains about 1710～2690MHz at least.It should be noted that; First operational frequency bands can contain three operations frequently of LTE700/GSM850/900; And second operational frequency bands can contain five operations frequently of GSM1800/1900/UMTS/LTE2300/2500, reaches WWAN/LTE eight operation frequently of antenna, makes mobile communications device can contain the operational frequency bands of all mobile communication at present; Its simple in structure, easy making simultaneously meets practical application request very much.
Notice again that please in the present embodiment, this earth element 10 and this medium substrate 12 of this antenna structure are arranged on the different plane of solid space.For instance; The main ground plane 101 of this earth element 10 and this outstanding ground plane 102 be positioned at (XY plane as shown in Figure 1) on one first plane; This medium substrate 12 then has interval 121 and one second portion interval 122 of a first that is the L font; And this medium substrate 12 comprises on one second plane that this first interval 121 of this short-circuit line 142 is positioned at perpendicular to this first plane (XZ plane as shown in Figure 1), and interval 122 of this second portion that this medium substrate 12 comprises this antenna element 11 is positioned at (another XY plane as shown in Figure 1) on one the 3rd plane that is parallel to this first plane.
Fig. 2 is the return loss measurement figure of a kind of mobile communications device first embodiment of the present invention.First embodiment selects that main ground plane 101 length are about 105mm, width is about 55mm; And outstanding ground plane 102 length are about 10mm, width is about 10mm; The length of the second portion of medium substrate 12 parallel outstanding ground planes 102 interval 122 is about that 55mm, width are about 10mm, thickness is about 0.8mm, and 55mm, width are about 8mm, thickness is about 0.8mm and the length of the first interval 121 of medium substrate 12 vertical outstanding ground planes 102 are about.By experimental result; Under the definition of 6dB return loss (general mobile communications device Antenna Design standard); First operational frequency bands 21 can contain LTE700/GSM850/900 (about 704～960MHz) three operations frequently; (about 1710～2690MHz) five frequencies are operated, so this antenna can satisfy WWAN/LTE eight operational requirements frequently and second operational frequency bands 22 can contain GSM1800/1900/UMTS/LTE2300/2500.Size that it should be noted that outstanding ground plane 102 is enough to dispose a common serial bus joint element, reaches the integration between antenna and external signal transfer element.
Then please refer to Fig. 3, Fig. 3 is the structure chart of second embodiment of a kind of mobile communications device 3 of the present invention.The structure of the mobile communications device 3 of second embodiment is similar with the mobile communications device 1 of first embodiment basically; Both differences are that the Department of Radiation 34 of antenna structure of the mobile communications device 3 of Fig. 3 has a short dot 341; This short dot 341 is electrically connected to this outstanding ground plane 102 by the short-circuit line 342 that bends at least more than the secondary; The length of this short-circuit line 342 be at least this short dot 341 and should outstanding ground plane 102 between 1.5 times of distance; The length that can prolong short-circuit line 342 by bending can be in order to the resonance mode of adjustment antenna element 11, and reduces the whole size of antenna.The mobile communications device 3 of second embodiment and antenna structure thereof also can produce two the broadband operation frequency bands similar with first embodiment 1, contain eight operations frequently of LTE/WWAN.
Then please refer to Fig. 4, Fig. 4 is the structure chart of the 3rd embodiment of a kind of mobile communications device 4 of the present invention.The structure of the mobile communications device 4 of the 3rd embodiment is similar with the mobile communications device 1 of first embodiment basically; The mobile communications device 4 that both differences are Fig. 4 with respect to the configurable external signal transfer element 49 of the opposite side of antenna element 11, provides the signal transmission interface of this mobile communications device and an external equipment at this outstanding ground plane 102.Above-mentioned external signal transfer element 49 can joint component be realized by a USB (USB, universal serial bus), but this is not a restrictive condition of the present invention.The mobile communications device 4 of the 3rd embodiment and antenna structure thereof also can produce two the broadband operation frequency bands similar with the mobile communications device of first embodiment 1, and contain eight operations frequently of LTE/WWAN.
Without doubt, know this art and should understand, under spirit of the present invention, the various variations of mobile communications device that Fig. 1, Fig. 3 and Fig. 4 mentioned and antenna structure thereof all are feasible.In addition, the bending number of Department of Radiation and short-circuit line is not limited to, and the yet non-restrictive condition of the present invention of overbending direction, bending angle and bending shape of each bending.
Above-described embodiment only is used for technical characterictic of the present invention is described, is not to be used for limiting to category of the present invention.Comprehensively above-mentioned; A kind of mobile communications device of the present invention and antenna structure thereof; It has an antenna that can produce two broadband operation frequency bands; This antenna has simple in structure; But and have an outstanding ground plane of integrating exterior signal transmission component, simultaneously two operational frequency bands of antenna can contain respectively LTE700/GSM850/900 three operations frequently (about 704～960MHz) and five operations frequently of GSM1800/1900/UMTS/LTE2300/2500 (about 1710～2690MHz), contain all mobile bands at present.
The above is merely the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (17)
1. a mobile communications device comprises an antenna structure, and this antenna structure comprises:
One earth element, this earth element comprise a main ground plane and an outstanding ground plane, and this outstanding ground plane is electrically connected in the one edge of this main ground plane; And
One antenna element, this antenna element is positioned on the medium substrate, and comprises:
One feeding portion, this feeding portion comprises:
One load point, this load point are electrically connected to a signal source that is positioned on this earth element; And
One first branch road and one second branch road; This first branch road and this second branch road all are connected to this load point; The openend of this first branch road and this second branch road extends towards rightabout; Wherein this feeding portion belongs to plane and has a projection at this earth element, and this projection comprises the partial section of this outstanding ground plane; And
One Department of Radiation, this Department of Radiation comprises:
One short dot, this short dot is electrically connected to this outstanding ground plane by a short-circuit line; And
One first openend and one second openend;
Wherein, this Department of Radiation comprises between one first section and this first branch road of this first openend and has one first coupling spacing, has one second spacing that is coupled between one second section that this Department of Radiation comprises this second openend and this second branch road.
2. mobile communications device as claimed in claim 1 is characterized in that, this outstanding ground plane is used to put the element that transmits with this mobile communications device external signal.
3. mobile communications device as claimed in claim 1 is characterized in that, this short-circuit line has at least the secondary bending, and its length is at least this short dot and should gives prominence to 1.5 times of distance between the ground plane.
4. mobile communications device as claimed in claim 1 is characterized in that, this antenna element has one first operational frequency bands and one second operational frequency bands, and this first operational frequency bands contains about 704～960MHz, and this second operational frequency bands contains about 1710～2690MHz.
5. like claim 1 or 4 described mobile communications devices, it is characterized in that the length of this first branch road to this load point is at least 0.2 times of wavelength of this second operational frequency bands highest frequency.
6. like claim 1 or 4 described mobile communications devices, it is characterized in that the length of this second branch road to this load point is at least 0.2 times of wavelength of this second operational frequency bands highest frequency.
7. mobile communications device as claimed in claim 1 is characterized in that, the length of this first branch road and this second branch road is inequality.
8. mobile communications device as claimed in claim 1 is characterized in that, this first coupling spacing is less than 2mm, and this second coupling spacing is less than 2mm.
9. mobile communications device as claimed in claim 1; It is characterized in that; This main ground plane and this outstanding ground plane are positioned on one first plane; It is interval and a second portion interval that this medium substrate has a first that is the L font, and this first interval that this medium substrate comprises this short-circuit line is positioned on one second plane perpendicular to this first plane, and this second portion interval that this medium substrate comprises this antenna element is positioned on one the 3rd plane that is parallel to this first plane.
10. antenna structure comprises:
One earth element, this earth element comprise a main ground plane and an outstanding ground plane, and this outstanding ground plane is electrically connected in the one edge of this main ground plane; And
One antenna element, this antenna element is positioned on the medium substrate, and comprises:
One feeding portion, this feeding portion comprises:
One load point, this load point are electrically connected to a signal source that is positioned on this earth element; And
One first branch road and one second branch road, this first branch road and this second branch road all are connected to this load point, and the openend of this first branch road and this second branch road extends towards rightabout; And
One Department of Radiation, this Department of Radiation comprises:
One short dot, this short dot is electrically connected to this outstanding ground plane by a short-circuit line; And
One first openend and one second openend;
Wherein, this Department of Radiation comprises between one first section and this first branch road of this first openend and has one first coupling spacing, has one second spacing that is coupled between one second section that this Department of Radiation comprises this second openend and this second branch road.
11. antenna structure as claimed in claim 10 is characterized in that, this short-circuit line has at least the secondary bending, and its length is at least this short dot and should gives prominence to 1.5 times of distance between the ground plane.
12. antenna structure as claimed in claim 10 is characterized in that, this antenna element has one first operational frequency bands and one second operational frequency bands, and this first operational frequency bands contains about 704～960MHz, and this second operational frequency bands contains about 1710～2690MHz.
13., it is characterized in that the length of this first branch road to this load point is at least 0.2 times of wavelength of this second operational frequency bands highest frequency like claim 10 or 12 described antenna structures.
14., it is characterized in that the length of this second branch road to this load point is at least 0.2 times of wavelength of this second operational frequency bands highest frequency like claim 10 or 12 described antenna structures.
15. antenna structure as claimed in claim 10 is characterized in that, the length of this first branch road and this second branch road is inequality.
16. antenna structure as claimed in claim 10 is characterized in that, this first coupling spacing is less than 2mm, and this second coupling spacing is less than 2mm.
17. antenna structure as claimed in claim 10; It is characterized in that; This main ground plane and this outstanding ground plane are positioned on one first plane; It is interval and a second portion interval that this medium substrate has a first that is the L font, and this first interval that this medium substrate comprises this short-circuit line is positioned on one second plane perpendicular to this first plane, and this second portion interval that this medium substrate comprises this antenna element is positioned on one the 3rd plane that is parallel to this first plane.
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| CN201110059727.3A CN102683829B (en) | 2011-03-11 | 2011-03-11 | Mobile communication device and antenna structure thereof |
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| CN201110059727.3A CN102683829B (en) | 2011-03-11 | 2011-03-11 | Mobile communication device and antenna structure thereof |
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| CN102683829A true CN102683829A (en) | 2012-09-19 |
| CN102683829B CN102683829B (en) | 2015-02-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103715497A (en) * | 2013-12-13 | 2014-04-09 | 惠州硕贝德无线科技股份有限公司 | Miniaturized LTE / WWAN antenna |
| CN104425873A (en) * | 2013-08-30 | 2015-03-18 | 华硕电脑股份有限公司 | Electronic device |
| CN106549208A (en) * | 2015-09-23 | 2017-03-29 | 宏达国际电子股份有限公司 | Electronic installation |
| CN107293858A (en) * | 2016-03-31 | 2017-10-24 | 上海莫仕连接器有限公司 | Antenna assembly |
| CN109390679A (en) * | 2017-08-03 | 2019-02-26 | 广达电脑股份有限公司 | Dual-band antenna structure |
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| CN1518159A (en) * | 2003-01-15 | 2004-08-04 | �ƶ��������LK����˾ | Multi-band antenna |
| CN1897354A (en) * | 2005-07-11 | 2007-01-17 | 株式会社东芝 | Antenna device, mobile terminal and rfid tag |
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| CN1518159A (en) * | 2003-01-15 | 2004-08-04 | �ƶ��������LK����˾ | Multi-band antenna |
| CN1897354A (en) * | 2005-07-11 | 2007-01-17 | 株式会社东芝 | Antenna device, mobile terminal and rfid tag |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425873A (en) * | 2013-08-30 | 2015-03-18 | 华硕电脑股份有限公司 | Electronic device |
| CN104425873B (en) * | 2013-08-30 | 2018-08-31 | 华硕电脑股份有限公司 | Electronic device |
| CN103715497A (en) * | 2013-12-13 | 2014-04-09 | 惠州硕贝德无线科技股份有限公司 | Miniaturized LTE / WWAN antenna |
| CN103715497B (en) * | 2013-12-13 | 2016-08-17 | 惠州硕贝德无线科技股份有限公司 | A kind of miniaturization LTE/WWAN antenna |
| CN106549208A (en) * | 2015-09-23 | 2017-03-29 | 宏达国际电子股份有限公司 | Electronic installation |
| CN106549208B (en) * | 2015-09-23 | 2019-07-05 | 宏达国际电子股份有限公司 | Electronic device |
| CN107293858A (en) * | 2016-03-31 | 2017-10-24 | 上海莫仕连接器有限公司 | Antenna assembly |
| US10680336B2 (en) | 2016-03-31 | 2020-06-09 | Molex, Llc | Antenna device |
| CN109390679A (en) * | 2017-08-03 | 2019-02-26 | 广达电脑股份有限公司 | Dual-band antenna structure |
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| CN102683829B (en) | 2015-02-04 |
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