CN102694243A - A miniature antenna applicable to mobile communication devices - Google Patents
A miniature antenna applicable to mobile communication devices Download PDFInfo
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- CN102694243A CN102694243A CN201110070379XA CN201110070379A CN102694243A CN 102694243 A CN102694243 A CN 102694243A CN 201110070379X A CN201110070379X A CN 201110070379XA CN 201110070379 A CN201110070379 A CN 201110070379A CN 102694243 A CN102694243 A CN 102694243A
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Abstract
The invention discloses a miniature antenna which is applicable to mobile communication devices and which comprises a substrate, a ground plane disposed on the second surface of the substrate, a radiation arm, a parasitic member, and a short circuit branch. The radiation arm includes a first part, a second part and a third part which are respectively disposed on the first surface, the first plane and the second plane of the substrate. Therein the first plane is perpendicular to the second plane, the first surface and the second surface of the substrate. Moreover the second plane is parallel with the first surface of the substrate and has given distance to the first surface. The parasitic member is connected with the ground plane and extends to the second surface, the first plane and the second plane of the substrate. The short circuit branch, which is disposed on the second plane, is connected with the ground plane and partially overlaps the third part of the radiation arm.
Description
Technical field
The present invention relates to a kind of miniature antenna, particularly relate to the miniature antenna that is applicable to device for mobile communication.
Background technology
The communication system that present device for mobile communication the most often uses is 2G and 3G system; For in response to this demand; Antenna in the device for mobile communication will need in limited space, to contain 5 and be with again and again, and above-mentioned 5 frequent bands comprise: 824MHz-894MHz, 880MHz-960MHz, 1710MHz-1880MHz, 1850MHz-1990MHz, 1920MHz-2170MHz.Formerly in the technology, singly will contain 5 with the unipole antenna (Monopole antenna) of two radiation branch roads and be with again and again, but be directed to the strict sky line standard of various countries telecommunication system dealer, the low-and high-frequency frequency range is still not enough.Use parasitic object to improve the not enough invention of high frequency frequency range though have thereafter, almost can't solve the not enough problem of low frequency bandwidth at present.
Summary of the invention
For addressing the above problem, the present invention provides a kind of miniature antenna, is applicable to a device for mobile communication, comprising: a substrate has a first surface and with respect to a second surface of above-mentioned first surface; One ground plane is arranged at above-mentioned second surface; One radiation arm; Comprise a first, a second portion and a third part; Be arranged at above-mentioned first surface, one first plane respectively, and one second plane, wherein: the above-mentioned second portion of above-mentioned radiation arm connects above-mentioned first and above-mentioned third part; The above-mentioned third part of above-mentioned radiation arm comprises one first radiation branch road; Above-mentioned first plane is perpendicular to above-mentioned second plane, above-mentioned first surface and above-mentioned second surface; And above-mentioned second plane parallel is in above-mentioned first surface, and with the distance of above-mentioned first surface be a both set a distance; One parasitic part connects above-mentioned ground plane, and extends to above-mentioned second surface, above-mentioned first plane and above-mentioned second plane; And a short circuit branch, be arranged at above-mentioned second surface, connect above-mentioned ground plane, and partially overlap the above-mentioned third part of above-mentioned radiation arm.
In addition, the present invention provides a kind of miniature antenna, is applicable to a device for mobile communication, comprising: a substrate has a first surface and with respect to a second surface of above-mentioned first surface; One ground plane is arranged at above-mentioned second surface; One radiation arm; Comprise a first, a second portion and a third part; Be arranged at above-mentioned first surface, one first plane respectively, and one second plane, wherein: the above-mentioned second portion of above-mentioned radiation arm connects above-mentioned first and above-mentioned third part; The above-mentioned third part of above-mentioned radiation arm comprises one first radiation branch road; Above-mentioned first plane is perpendicular to above-mentioned second plane, above-mentioned first surface and above-mentioned second surface; And above-mentioned second plane parallel is in above-mentioned first surface, and with the distance of above-mentioned first surface be a both set a distance; And a short circuit branch, be arranged at above-mentioned second surface, connect above-mentioned ground plane, and partially overlap the above-mentioned third part of above-mentioned radiation arm.
Description of drawings
Figure 1A is the stereogram of the described miniature antenna of one embodiment of the invention;
Figure 1B is the perspective view of the described miniature antenna of one embodiment of the invention;
Fig. 2 is the plane graph of the third part of the described radiation arm of one embodiment of the invention.
Fig. 3 is the plane graph of the described short circuit branch of one embodiment of the invention;
Fig. 4 is the described loss figure that turns back of one embodiment of the invention;
Fig. 5 A is the stereogram of the described miniature antenna of one embodiment of the invention;
Fig. 5 B is the perspective view of the described miniature antenna of one embodiment of the invention;
Fig. 6 A is the stereogram of the described miniature antenna of one embodiment of the invention;
Fig. 6 B is the perspective view of the described miniature antenna of one embodiment of the invention.
The main element symbol description
10,50,60～miniature antenna;
12～substrate;
The first surface of 12a～substrate;
The second surface of 12b～substrate;
14～ground plane;
16,56～radiation arm;
The first of 161～radiation arm;
The second portion of 162～radiation arm;
163, the third part of 563～radiation arm;
The radiation branch road of the third part of 163a, 163b～radiation arm;
17～parasitic part;
18～short circuit branch;
The inverted L shape part of 18a, 18b～short circuit branch;
19～signal feed-in point;
40～loss figure turns back;
41,42～operational frequency bands;
411,412,423,424～Frequency point;
D1, d2, d3～length;
E1～first plane;
E2～second plane.
Embodiment
Figure 1A is the stereogram that shows according to the described miniature antenna 10 of one embodiment of the invention.Figure 1B is the perspective view that shows according to the described miniature antenna 10 of one embodiment of the invention.Shown in Figure 1A, Figure 1B, miniature antenna 10 can comprise: substrate 12, ground plane 14, radiation arm 16, parasitic part 17 and short circuit branch 18.Wherein, substrate 12 can be a glass mat.Ground plane 14, radiation arm 16, parasitic part 17 and short circuit branch 18 can be made of metal, for example: copper.Substrate 12 has first surface 12a and second surface 12b, and ground plane 14 is arranged at second surface 12b.In another embodiment of the present invention, the first surface 12a of substrate 12 also is furnished with another ground plane, and is electrically connected to ground plane 14.
Because miniature antenna 10 is a stereochemical structure, describes with the first plane E1, the second plane E2 at this.Shown in Figure 1A, Figure 1B, the first surface 12a of the first plane E1 and the second plane E2, substrate 12 is all vertical with second surface 12b, and the second plane E2 is parallel to the first surface 12a of substrate 12, and is both set a distances with the distance of first surface 12a, and promptly length d 1.Radiation arm 16 comprises first 161, second portion 162 and third part 163, is arranged at first surface 12a, the first plane E1 and the second plane E2 of substrate 12 respectively.The second portion 162 of radiation arm 16 connects first 161 and third part 163.One end of the first 161 of radiation arm 16 is signal feed-in point 19, in order to energy or signal feed-in.Parasitic part 17 is connected to ground plane 14, and extends to second surface 12b, the first plane E1 and the second plane E2 of substrate 12.Short circuit branch 18 is arranged at the second surface 12b of substrate 12, and is connected to ground plane 14, and partially overlaps the third part 163 of radiation arm 16.。In addition, the distance of radiation arm 16 and parasitic part 17 must be less than length d 2, and the distance of short circuit branch 18 and parasitic part 17 must be greater than length d 3.In some embodiments of the invention, length d 2 is 1.5mm, and length d 3 is 10mm.In another embodiment of the present invention, if be 1.9GHz in frequency of operation, dielectric coefficient is that length d 3 is about 0.1 times of wavelength under 4 the situation; And if be 2.1GHz in frequency of operation, dielectric coefficient is under 2.5 the situation, and length d 2 is about 0.005-0.033 times of wavelength.Disclose above component size though must be noted that the embodiment of the invention, and not exclusive way, know visual centre frequency of present technique field personage and dielectric coefficient and change.
Fig. 2 is the plane graph that shows according to the third part 163 of the described radiation arm 16 of one embodiment of the invention.As shown in Figure 2, the third part 163 of radiation arm 16 comprises radiation branch road 163a, 163b.Wherein, the length of the radiation branch road 163a of corresponding low frequency is longer than the length of the radiation branch road 163b of corresponding high frequency.
Fig. 3 is the plane graph that shows according to the described short circuit branch 18 of one embodiment of the invention.As shown in Figure 3, short circuit branch 18 comprises inverted L shape part 18a, 18b, is connected to each other.Short circuit branch 18 is corresponding to radiation branch road 163a, 163b.
Fig. 4 shows according to the described loss Figure 40 that turns back of one embodiment of the invention.When signal or energy are described by signal feed-in point 19 feed-ins of miniature antenna 10, the loss of turning back that measures (unit: dB) to frequency (unit: MHz) sketch map.As shown in Figure 4, when being standard with 6dB, miniature antenna 10 has operational frequency bands 41,42.In an embodiment of the present invention, the scope of operational frequency bands 41 can be between 824MHz between the 960MHz, and covering scope comprises the GSM850/900 frequency range; And operational frequency bands 42 scopes can be between 1710MHz between the 2170MHz, and covering scope comprises the GSM1800/1900/UMTS frequency range.Therefore, miniature antenna 10 can satisfy 5 bandwidth requirements of 2G and 3G communication system.
Aspect Principle of Antenna, short circuit branch 18 can resonate and produce the Frequency point 411 that is positioned at operational frequency bands 41.The radiation branch road 163a of the first 161 of radiation arm 16, second portion 162 and third part 163 can resonate and produce the Frequency point 412 that is positioned at operational frequency bands 41.The radiation branch road 163b of the first 161 of radiation arm 16, second portion 162 and third part 163 can resonate and produce the Frequency point 423 that is positioned at operational frequency bands 42.Parasitic part 17 can resonate and produce the Frequency point 424 that is positioned at operational frequency bands 42.If above Frequency point is low to high ordering according to frequency, be in regular turn: Frequency point 411, Frequency point 412, Frequency point 423, Frequency point 424.
In some embodiments of the invention, each component size of miniature antenna 10 is following: the length of substrate 12 is about 110mm, and width is about 55mm, and thickness is about 1mm; The length of ground plane 14 is about 102mm, and width is about 55mm; The total length that the first 161 and the second portion 162 of radiation arm 16 link together is about 14mm, and width is about 1mm; The length of the radiation branch road 163a of the third part 163 of radiation arm 16 is about 70mm, and its free-ended width is about 2mm, and the width of other parts is about 1mm; The length of the radiation branch road 163b of the third part 163 of radiation arm 16 is about 33mm, and its free-ended width is about 6mm, and the width of other parts is about 1.5mm; The length of parasitic part 17 is about 28mm, and width is about 1mm; The length of short circuit branch 18 is about 89mm, and width is about 1mm.Disclose above component size though must be noted that the embodiment of the invention, and not exclusive way, know visual centre frequency of present technique field personage and dielectric coefficient and change.
Fig. 5 A, Fig. 5 B are stereogram, the perspective views that shows respectively according to the described miniature antenna 50 of one embodiment of the invention.Miniature antenna 50 is similar with miniature antenna 10, and difference is following: the third part 563 of radiation arm 56 only comprises radiation branch road 163a.
Fig. 6 A, Fig. 6 B are stereogram, the perspective views that shows respectively according to the described miniature antenna 60 of one embodiment of the invention.Miniature antenna 60 is similar with miniature antenna 10, and difference is following: the third part 563 of (1) radiation arm 56 only comprises radiation branch road 163a; (2) miniature antenna 60 does not comprise parasitic part 17.
Though the present invention discloses as above with preferred embodiment; Yet it is not in order to limiting scope of the present invention, anyly is familiar with this operator, is not breaking away from the spirit and scope of the present invention; Can do a little change and retouching, thus protection scope of the present invention should with enclose claim was defined is as the criterion.
Claims (11)
1. a miniature antenna is applicable to a device for mobile communication, comprising:
Substrate has first surface and with respect to the second surface of above-mentioned first surface;
Ground plane is arranged at above-mentioned second surface;
Radiation arm comprises first, second portion and third part, is arranged at above-mentioned first surface, first plane respectively, and second plane, wherein:
The above-mentioned second portion of above-mentioned radiation arm connects above-mentioned first and above-mentioned third part;
The above-mentioned third part of above-mentioned radiation arm comprises the first radiation branch road;
Above-mentioned first plane is perpendicular to above-mentioned second plane, above-mentioned first surface and above-mentioned second surface; And above-mentioned second plane parallel is in above-mentioned first surface, and with the distance of above-mentioned first surface be a both set a distance;
Parasitic part connects above-mentioned ground plane, and extends to above-mentioned second surface, above-mentioned first plane and above-mentioned second plane; And
Short circuit branch is arranged at above-mentioned second surface, connects above-mentioned ground plane, and partially overlaps the above-mentioned third part of above-mentioned radiation arm.
2. miniature antenna as claimed in claim 1, wherein:
Above-mentioned short circuit branch resonance produces the first frequency point that is positioned at one first operational frequency bands; And
The above-mentioned first radiation branch road of the above-mentioned first of above-mentioned radiation arm, above-mentioned second portion and above-mentioned third part, resonance produces the second frequency point in above-mentioned first operational frequency bands.
3. miniature antenna as claimed in claim 1, the above-mentioned third part of above-mentioned radiation arm wherein also comprises:
The above-mentioned first of the second radiation branch road and above-mentioned radiation arm and the resonance of above-mentioned second portion produce one the 3rd Frequency point in one second operational frequency bands.
4. miniature antenna as claimed in claim 3, wherein above-mentioned parasitic part resonance produces one the 4th Frequency point in above-mentioned second operational frequency bands.
5. miniature antenna as claimed in claim 1, the distance of wherein above-mentioned radiation arm and above-mentioned parasitic part is less than 1.5mm.
6. miniature antenna as claimed in claim 1, the distance of wherein above-mentioned short circuit branch and above-mentioned parasitic part is greater than 10mm.
7. miniature antenna as claimed in claim 1, wherein above-mentioned short circuit branch comprise interconnected one first inverted L shape part and one second inverted L shape part.
8. a miniature antenna is applicable to a device for mobile communication, comprising:
Substrate has first surface and with respect to the second surface of above-mentioned first surface;
Ground plane is arranged at above-mentioned second surface;
Radiation arm comprises first, second portion and third part, is arranged at above-mentioned first surface, first plane respectively, and second plane, wherein:
The above-mentioned second portion of above-mentioned radiation arm connects above-mentioned first and above-mentioned third part;
The above-mentioned third part of above-mentioned radiation arm comprises the first radiation branch road;
Above-mentioned first plane is perpendicular to above-mentioned second plane, above-mentioned first surface and above-mentioned second surface; And
Above-mentioned second plane parallel is in above-mentioned first surface, and with the distance of above-mentioned first surface be a both set a distance; And
Short circuit branch is arranged at above-mentioned second surface, connects above-mentioned ground plane, and partially overlaps the above-mentioned third part of above-mentioned radiation arm.
9. miniature antenna as claimed in claim 8, wherein:
Above-mentioned short circuit branch resonance produces the first frequency point that is positioned at one first operational frequency bands; And
The above-mentioned first radiation branch road of the above-mentioned first of above-mentioned radiation arm, above-mentioned second portion and above-mentioned third part, resonance produces the second frequency point in above-mentioned first operational frequency bands.
10. miniature antenna as claimed in claim 8, the above-mentioned third part of above-mentioned radiation arm wherein also comprises:
The above-mentioned first of the second radiation branch road and above-mentioned radiation arm and the resonance of above-mentioned second portion produce one the 3rd Frequency point in one second operational frequency bands.
11. miniature antenna as claimed in claim 8, wherein above-mentioned short circuit branch comprise interconnected one first inverted L shape part and one second inverted L shape part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110070379XA CN102694243A (en) | 2011-03-23 | 2011-03-23 | A miniature antenna applicable to mobile communication devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110070379XA CN102694243A (en) | 2011-03-23 | 2011-03-23 | A miniature antenna applicable to mobile communication devices |
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| CN102694243A true CN102694243A (en) | 2012-09-26 |
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| CN201110070379XA Pending CN102694243A (en) | 2011-03-23 | 2011-03-23 | A miniature antenna applicable to mobile communication devices |
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Cited By (5)
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| CN103794866A (en) * | 2012-11-05 | 2014-05-14 | 宏碁股份有限公司 | Mobile communication device |
| CN105226387A (en) * | 2014-06-30 | 2016-01-06 | 泰科电子(上海)有限公司 | Antenna assembly |
| CN106207400A (en) * | 2014-12-04 | 2016-12-07 | 纬创资通股份有限公司 | Wideband monopole type antenna, electronic installation and Anneta module |
| CN106856256A (en) * | 2015-12-08 | 2017-06-16 | 广达电脑股份有限公司 | Mobile device |
| WO2018022100A1 (en) * | 2016-07-29 | 2018-02-01 | Hewlett-Packard Development Company, L.P. | An antenna for a communication device |
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| US20030174092A1 (en) * | 2002-03-15 | 2003-09-18 | Sullivan Jonathan Lee | Planar inverted-F antenna including a matching network having transmission line stubs and capacitor/inductor tank circuits |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103794866A (en) * | 2012-11-05 | 2014-05-14 | 宏碁股份有限公司 | Mobile communication device |
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| CN105226387A (en) * | 2014-06-30 | 2016-01-06 | 泰科电子(上海)有限公司 | Antenna assembly |
| CN106207400A (en) * | 2014-12-04 | 2016-12-07 | 纬创资通股份有限公司 | Wideband monopole type antenna, electronic installation and Anneta module |
| CN106207400B (en) * | 2014-12-04 | 2020-03-10 | 纬创资通股份有限公司 | Broadband monopole antenna, electronic device, and antenna module |
| CN106856256A (en) * | 2015-12-08 | 2017-06-16 | 广达电脑股份有限公司 | Mobile device |
| WO2018022100A1 (en) * | 2016-07-29 | 2018-02-01 | Hewlett-Packard Development Company, L.P. | An antenna for a communication device |
| TWI679800B (en) * | 2016-07-29 | 2019-12-11 | 惠普發展公司有限責任合夥企業 | An antenna for a communication device |
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Application publication date: 20120926 |