CN102664304B - Portable electronic device with internally-arranged Bluetooth antenna - Google Patents
Portable electronic device with internally-arranged Bluetooth antenna Download PDFInfo
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- CN102664304B CN102664304B CN201210127781.1A CN201210127781A CN102664304B CN 102664304 B CN102664304 B CN 102664304B CN 201210127781 A CN201210127781 A CN 201210127781A CN 102664304 B CN102664304 B CN 102664304B
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Abstract
The invention provides a portable electronic device with an internally-arranged Bluetooth antenna. The portable electronic device comprises a printed circuit board, a low-loss medium substrate and an antenna conductor, wherein the low-loss medium substrate is adhered to the surface of the printed circuit board; the antenna conductor is paved from the surface of the printed circuit board to the surface of the low-loss medium substrate; the antenna conductor comprises a feed part, a signal transmission unit, a feed matching unit arranged at a middle position in the signal transmission unit, and a monopole antenna vibrator extending from the signal transmission unit. The Bluetooth antenna conductor is designed to comprise the bent monopole antenna vibrator and is combined with the low-loss medium substrate through combining a limited space in a shell of the portable electronic device, so that the radiation efficiency, the matching property and the gain of the internally-arranged Bluetooth antenna are greatly improved.
Description
Technical field
The present invention relates to a kind of portable electron device, particularly relate to a kind of portable electron device with internally-arranged type Bluetooth antenna.
Background technology
In recent years, mobile communication equipment requires the execution of miniaturized, lightening and multiple application function.Tackle this requirement, its trend be embody several functions possess blue-tooth device, as the game device of various interaction.
Bluetooth by the computer of distance (as, IPAD panel computer) carry out wireless interconnected with mobile device, game station, can real time bidirectional communication, the specification of devices interconnect and function are met the requirements, this also give user extremely strong game interactive experience sense is provided, greatly excavated the interest in game play of user.
And above-mentioned bluetooth is applicable to mobile communication terminal, when can utilize the automatic vending machine of mobile communication terminal or carry out taking subway automatic defrayment wireless payment method etc. ecommerce.
In addition, undertaken wireless interconnected by above-mentioned mobile communication terminal and notebook computer, panel computer, can send or receive data, and can be connected with peripheral devices such as loud speakers.
But, above-mentioned portable electron device installs bluetooth module and Bluetooth antenna, thus need exceptional space, therefore require while portable electron device mechanism design substantially remaining unchanged, being arranged at by Bluetooth antenna among described housing is a technical problem urgently to be resolved hurrily.
Summary of the invention
For solving the problems of the technologies described above, space that can be limited in combined type portable electronic device housing, improve a kind of radiation efficiency high, match and internally-arranged type Bluetooth antenna that gain is high, therefore the invention provides a kind of portable electron device with internally-arranged type Bluetooth antenna.
Meanwhile, the present invention also provide a kind of radiation efficiency high, match and internally-arranged type Bluetooth antenna that gain is high.
There is a portable electron device for internally-arranged type Bluetooth antenna, comprising:
One printed circuit board (PCB);
One low loss dielectric substrate, is attached to described printed circuit board surface;
One antenna conductor, described antenna conductor is laid to low loss dielectric substrate surface from printed circuit board surface; Comprise a current feed department, a signal transmission unit, a feed matching unit be set on described signal transmission unit centre position and the described signal transmission unit that continues extends a monopole antenna element.Described low loss dielectric substrate comprises a sidewall and the curved wall adjacent with described sidewall, described signal transmission unit extends to the monopole antenna element of low loss dielectric substrate surface along described sidewall, and described monopole antenna element comprises a bending monopole antenna element and lays along described curved wall edge.The bending angle of described bending monopole antenna element is acute angle.
Further, described feed matching unit is an electric capacity.
Further, described low loss dielectric substrate, at 1GHz operation at frequencies, has≤electrical loss tangent the amount of 0.008.
Further, the thickness of described low loss dielectric substrate is 0.4mm-1mm.
Further, described current feed department, signal transmission unit and feed matching unit are arranged in printed circuit board surface.
Further, described monopole antenna element continue described signal transmission unit extend be laid on low loss dielectric substrate surface.
A kind of internally-arranged type Bluetooth antenna, comprises
One low loss dielectric substrate, at 1GHz operation at frequencies, has≤electrical loss tangent the amount of 0.008;
One antenna conductor, comprise a current feed department, a signal transmission unit, on described signal transmission unit centre position, arrange a feed matching unit and the described signal transmission unit that continues extends a monopole antenna element, wherein said monopole antenna element is arranged at described low loss dielectric substrate surface.Described low loss dielectric substrate comprises a sidewall and the curved wall adjacent with described sidewall, described signal transmission unit extends to the monopole antenna element of low loss dielectric substrate surface along described sidewall, and described monopole antenna element comprises a bending monopole antenna element and lays along described curved wall edge.The bending angle of described bending monopole antenna element is acute angle.
Relative to the existing portable electron device with internally-arranged type Bluetooth antenna, by space limited in combined type portable electronic device housing, Bluetooth antenna conductor design comprised a bending monopole antenna element and in conjunction with low loss dielectric substrate, the radiation efficiency greatly improving internally-arranged type Bluetooth antenna is high, match and gain high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the Bluetooth antenna one embodiment perspective view in kind of portable electron device of the present invention;
Fig. 2 is the enlarged drawing of Bluetooth antenna shown in Fig. 1;
Fig. 3 is based on the analogous diagram of the Bluetooth antenna of the built-in environment of portable electron device in 2.4GHz ~ 2.5GHz frequency range shown in Fig. 2;
Fig. 4 is the Smith chart of Bluetooth antenna shown in Fig. 2.
Embodiment
Now in detail with reference to the embodiment described in accompanying drawing.In order to complete understanding the present invention, refer to numerous detail in the following detailed description.But it should be appreciated by those skilled in the art that the present invention can realize without the need to these details.In other embodiments, known method is not described in detail.Process, assembly and circuit, in order to avoid unnecessarily make embodiment fuzzy.
Refer to Fig. 1, the perspective view in kind of Bluetooth antenna one embodiment for portable electron device of the present invention.It is that antenna model selection and the antenna after determining type selecting depend on medium that the Bluetooth antenna major parameter performance of portable electron device is correlated with, i.e. the parameter such as medium dielectric loss.
Portable electron device of the present invention comprises printed circuit board (PCB) 19, low loss dielectric substrate 20 and lays to the antenna conductor 12 low loss dielectric substrate 20 surface from printed circuit board (PCB) 19 surface.The part surface of described printed circuit board (PCB) 19 is provided with some electronic components, as resistance, electric capacity and chip etc.Do not arrange electronic component printed circuit board (PCB) 19 surface stack described in low loss dielectric substrate 20.In the present embodiment, described antenna conductor 12 resonance frequency be 2.4GHz ~ 2.5GHz frequency band; The thickness of described low loss dielectric substrate 20 substrate is 0.4mm-1mm and is arranged on described printed circuit board (PCB) 19 lateral edges.
In the present embodiment, described antenna conductor 12 is a Bluetooth antenna conductor, and the Selection and Design of its Bluetooth antenna conductor is as follows:
Refer to Fig. 2, the enlarged drawing of shown Bluetooth antenna.Described antenna conductor 12 comprise be arranged at printed circuit board (PCB) 19 surface a current feed department 7, extend a signal transmission unit 8 by described current feed department 7 on the surface at printed circuit board (PCB) 19, the monopole antenna element 10 that a feed matching unit 9 and the described signal transmission unit 8 that continues extend to low loss dielectric substrate 20 surface be set on described signal transmission unit 8 centre position.
In the present embodiment, described monopole antenna element 10 is one comprise bending monopole antenna element and lay along described low loss dielectric substrate 20 lateral edges.Described low loss dielectric substrate 20 comprises a sidewall 22 and the curved wall 21 adjacent with described sidewall.Described signal transmission unit 8 extends to the monopole antenna element 10 on low loss dielectric substrate 20 surface along described sidewall 22.Described monopole antenna element 10 is laid along described curved wall 21 edge.
In the present embodiment, the bending angle of described bending monopole antenna element 10 is acute angle.Feed matching unit 9 is an electric capacity.Be in mode at other, described feed matching unit 9 is an inductance.
The design of low loss dielectric substrate:
In order to reduce the energy loss of antenna element, improving the performance of whole antenna, adopting low dielectric constant and low loss medium substrate, requiring that antenna medium substrates is at 1GHz operation at frequencies, have≤nominal dielectric constant of 4.0 and the electrical loss tangent amount of≤0.008.Described medium substrate comprises glass-fiber-fabric, epoxy resin and comprises the compound with described epoxy resin generation cross-linking reaction.Described medium substrate first kind execution mode is as follows:
Described medium substrate manufacture craft is as follows: first, provides an infiltration solution to comprise: the first component, includes epoxy resin; Second component, comprises the compound with described epoxy resin generation cross-linking reaction; And one or more solvents.Wherein the first component and the second component configure mixing according to a certain percentage.
Described infiltration solution after stirring, a described glass-fiber-fabric are infiltrated in described infiltration solution the first component and the second component are adsorbed in glass-fiber-fabric or on the surface; Then baking is copied described glass-fiber-fabric and is made one or more solvent evaporates described, and makes the first component and the mutual chemical combination of the second component be cross-linked to form prepreg or cured sheets.Prepreg refers to be copied in the relatively low environment of temperature by the glass-fiber-fabric of absorption first component and the second component in baking, and the first component comprises the soft mixture of epoxy resin and the second component inclusion compound part generation chemical combination cross-linking reaction.Solidfied material refers to be copied in the relatively high environment of temperature by the glass-fiber-fabric of absorption first component and the second component in baking, and the first component comprises the relatively hard mixture of epoxy resin and the second component inclusion compound part generation chemical combination cross-linking reaction.
In the present embodiment, the described glass-fiber-fabric infiltrated forms semi-solid preparation thing (in the form of sheets) by low-temperature bake, then described semi-solid preparation thing is cut into and cuts out sheet, needs described multi-disc to cut out sheet superimposed and carry out the multilayer dielectric substrate (i.e. multilayer laminate or sheet) that is hot pressed into described in this enforcement according to thickness.
In the particular embodiment, the compound of described second component can select the copolymer comprised by polarity macromolecule and non-polar high polymer chemical combination, as styrene maleic anhydride copolymer.Be understandable that, can all can be used for the Formulation Ingredients of present embodiment with the copolymer of epoxy resin generation chemical combination cross-linking reaction.The wherein styrene maleic anhydride copolymer of present embodiment, its molecular formula is as follows:
4 styrene are comprised in above-mentioned styrene maleic anhydride copolymer molecular formula.In other embodiments, corresponding molecular weight can be selected, as comprised 6,8 styrene or any number in styrene maleic anhydride copolymer molecular formula.Epoxy resin is the organic high molecular compound containing two or more epoxide groups in general reference molecule.
In other examples, the compound of the described second component mixture that can also select cyanate performed polymer or select styrene maleic anhydride copolymer to mix according to arbitrary proportion with cyanate performed polymer.
In the particular embodiment, described epoxy resin and styrene maleic anhydride copolymer are prepared according to the ratio of sense value, then add a certain amount of solvent solution-forming.Described epoxy resin and styrene maleic anhydride copolymer hybrid technique adopt conventional equipment to process, as normal agitation bucket and reactor make epoxy resin and styrene maleic anhydride copolymer Homogeneous phase mixing, thus make the epoxy resin in described solution and styrene maleic anhydride copolymer Homogeneous phase mixing.
In the particular embodiment, impelling gel in above-mentioned infiltration solution 200-400 time second (selecting gel ambient temperature 171 DEG C) by adding certain promoter, wherein promoting that about 260 seconds above-mentioned infiltration solution gelatinizing time (as 258-260 second or 250-270 second etc.) effect is better.Described promoter can be selected and be included but not limited to tertiary amines, any class in imidazoles and Boron Trifluoride Ethylamine or mixture between them.
One or more solvents described can select the mixed solvent including but not limited in acetone, butanone, DMF, EGME, toluene be mixed to form between any one or above-mentioned two or more solvent.
In another embodiment, described infiltration solution comprises: the first component, comprises epoxy resin; Second component, comprises the compound with described epoxy resin generation cross-linking reaction; And one or more solvents.The mixture that the compound of described second component selects styrene maleic anhydride copolymer to mix according to arbitrary proportion with cyanate performed polymer.Wherein said cyanate performed polymer concentration 75%.Promoter selects methylimidazole; Butanone selected by described solvent.This execution mode infiltrates solution and specifically fills a prescription as following table:
In above-mentioned formula, add styrene maleic anhydride copolymer and cyanate performed polymer, all can there is chemical combination cross-linking reaction with epoxy resin in both simultaneously.
Equations of The Second Kind execution mode is as follows:
In Equations of The Second Kind execution mode of the present invention, the medium substrate manufacture process of described low dielectric constant and low loss also comprises following technique: first, second component is comprised compound that crosslinked reaction occurs with described epoxy resin and described epoxy resin is prepared according to the ratio of sense value, then add a certain amount of solvent solution-forming.In the particular embodiment, described compound comprises the copolymer of polarity macromolecule and non-polar high polymer chemical combination, and the copolymer of wherein preferred embodiment can select styrene maleic anhydride copolymer.Described epoxy resin and styrene maleic anhydride copolymer hybrid technique adopt conventional equipment to process, as normal agitation bucket and reactor make epoxy resin and styrene maleic anhydride copolymer Homogeneous phase mixing.The wherein styrene maleic anhydride copolymer of present embodiment, its molecular formula is as follows:
4 styrene are comprised in above-mentioned styrene maleic anhydride copolymer molecular formula.In other embodiments, corresponding molecular weight can be selected, as comprised 6 or 8 styrene in styrene maleic anhydride copolymer molecular formula.Epoxy resin is the organic high molecular compound containing two or more epoxide groups in general reference molecule.
In other examples, the compound of the described second component mixture that can also select cyanate performed polymer or select styrene maleic anhydride copolymer to mix according to arbitrary proportion with cyanate performed polymer.
In the particular embodiment, make the epoxy resin in described solution and styrene maleic anhydride copolymer can carry out chemical combination cross-linking reaction under certain condition, depend on described glass-fiber-fabric after there is chemical combination cross-linking reaction, thus form medium substrate of the present invention.
One or more solvents described can select to include but not limited in acetone, butanone, DMF, EGME, toluene any one or above-mentioned between mixed solvent.
The various component ratio of described solution one specific embodiment is as following table:
Above-mentioned solution formula comprises epoxy resin, styrene maleic anhydride copolymer, cyanate performed polymer, promoter methylimidazole and a kind of solvent butanone.In above-mentioned formula, add styrene maleic anhydride copolymer and cyanate performed polymer, both are all cross-linked with epoxy resin energy chemical combination simultaneously.
Then, from above-mentioned solution, extracting described a small amount of test sample book, the solution gelatinizing time described in a certain specified temp environmental testing, regulating described solution at this fixed temperature environment gel time by adding promoter.The gel within 200-400 time second of above-mentioned solution can be impelled by adding one or more promoter, wherein said a certain specified temp environment is a single temperature value or a selected specific range of temperatures, in present embodiment, carrying out gel time by being set in 171 degrees Celsius of environment, making above-mentioned solution better in gel time about 260 seconds (as 258-260 second or 250-270 second etc.) effect.Described promoter can be selected and be included but not limited to select tertiary amines, any class in imidazoles and Boron Trifluoride Ethylamine or mixture between them.
3rd step, when above-mentioned test sample book during gel, takes out oven dry after being infiltrated by glass-fiber-fabric in described solution in 200-400 time range second, forms composition.In these concrete steps, glass-fiber-fabric to be immersed in solution fully to infiltrate and ensure that described epoxy resin and styrene maleic anhydride copolymer to be adsorbed in glass-fiber-fabric or on the surface, then the glass cloth of solution is immersed by hanging on air dry oven 180 DEG C of bakings about 5 minutes, solvent butanone fully volatilizees by object exactly, and make described epoxy resin and styrene maleic anhydride copolymer chemical combination cross-linking reaction, the product of glass cloth and described chemical combination cross-linking reaction obtains semi-solid preparation composition.Be understandable that, extend baking time and or improve baking temperature, can hardening composition be formed.General a large amount of industrial production adopts in vertical gluing machine and completes in impregnation subsystem and baking oven subsystem.
Finally, the change composition of oven dry and conductive foil are carried out pressing.In these concrete steps, by change composition (prepreg or prepreg) and conductive foil pressing in vacuum hotpressing machine of drying.Described conductive foil is selected and is comprised the obtained electric conducting material such as copper, silver, gold, aluminium or above-mentioned material alloy material.Because the price of copper product is relatively low, the conductive foil be made of copper therefore is selected to be suitable for industrialization.
See also Fig. 3 and Fig. 4, be to the present invention be based on the built-in environment of portable electron device Bluetooth antenna the analogous diagram of 2.4GHz ~ 2.5GHz frequency range and Smith chart the simulation results as follows:
Described Bluetooth antenna, in the resonance electricity standing-wave ratio 1.2 of 2.4GHz ~ 2.5GHz frequency range, embodies and joins bark effect very well.Design parameter is as figure below:
Find out from the test result of entirety, reduced dielectric constant and the dielectric loss of medium base substrate by the form introducing polarity and non-polar high polymer copolymer, thus make the loss of double frequency GPRS antenna device less, energy conversion rate improves; Further increase the combination properties such as the gain of double frequency GPRS antenna device by antenna model selection, the design of optimization antenna model selection simultaneously.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (7)
1. there is a portable electron device for internally-arranged type Bluetooth antenna, it is characterized in that, comprising:
One printed circuit board (PCB);
One low loss dielectric substrate, is attached to described printed circuit board surface; And
One antenna conductor, described antenna conductor is laid to low loss dielectric substrate surface from printed circuit board surface,
Described antenna conductor comprises a current feed department, a signal transmission unit, on described signal transmission unit centre position, arrange a feed matching unit and the described signal transmission unit that continues extends a monopole antenna element,
Wherein, described low loss dielectric substrate comprises a sidewall and the curved wall adjacent with described sidewall, described signal transmission unit extends to the monopole antenna element of low loss dielectric substrate surface along described sidewall, described monopole antenna element comprises a bending monopole antenna element and lays along described curved wall edge, and the bending angle of described bending monopole antenna element is acute angle.
2. portable electron device according to claim 1, is characterized in that, described feed matching unit is an electric capacity.
3. portable electron device according to claim 2, is characterized in that, described low loss dielectric substrate, at 1GHz operation at frequencies, has≤electrical loss tangent the amount of 0.008.
4. portable electron device according to claim 3, is characterized in that, the thickness of described low loss dielectric substrate is 0.4mm-1mm.
5. portable electron device according to claim 4, is characterized in that, described current feed department, signal transmission unit and feed matching unit are arranged in printed circuit board surface.
6. portable electron device according to claim 5, is characterized in that, described monopole antenna element continue described signal transmission unit extend be laid on low loss dielectric substrate surface.
7. an internally-arranged type Bluetooth antenna, is characterized in that, described Bluetooth antenna comprises
One low loss dielectric substrate, at 1GHz operation at frequencies, has≤electrical loss tangent the amount of 0.008;
One antenna conductor, comprise a current feed department, a signal transmission unit, a feed matching unit be set on described signal transmission unit centre position and the described signal transmission unit that continues extends a monopole antenna element, wherein said monopole antenna element is arranged at described low loss dielectric substrate surface
Wherein, described low loss dielectric substrate comprises a sidewall and the curved wall adjacent with described sidewall, described signal transmission unit extends to the monopole antenna element of low loss dielectric substrate surface along described sidewall, described monopole antenna element comprises a bending monopole antenna element and lays along described curved wall edge, and the bending angle of described bending monopole antenna element is acute angle.
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| CN201210127781.1A CN102664304B (en) | 2012-04-27 | 2012-04-27 | Portable electronic device with internally-arranged Bluetooth antenna |
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| CN201210127781.1A CN102664304B (en) | 2012-04-27 | 2012-04-27 | Portable electronic device with internally-arranged Bluetooth antenna |
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| CN101740854A (en) * | 2008-11-10 | 2010-06-16 | 英业达股份有限公司 | dual-frequency antenna |
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| KR100285950B1 (en) * | 1997-12-26 | 2001-04-16 | 윤종용 | Method for emboding antenna circuit of mobile phone for reducing an influence of human body |
| JP4432254B2 (en) * | 2000-11-20 | 2010-03-17 | 株式会社村田製作所 | Surface mount antenna structure and communication device including the same |
| US7512413B2 (en) * | 2003-06-03 | 2009-03-31 | Nokia Corporation | Systems and methods that employ multiple antennas with a device for mobile communication |
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| CN101740854A (en) * | 2008-11-10 | 2010-06-16 | 英业达股份有限公司 | dual-frequency antenna |
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Effective date of registration: 20210512 Address after: 2 / F, software building, No.9, Gaoxin Zhongyi Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: KUANG-CHI INSTITUTE OF ADVANCED TECHNOLOGY Address before: 18B, building a, CIC international business center, 1061 Xiangmei Road, Futian District, Shenzhen, Guangdong 518034 Patentee before: KUANG-CHI INNOVATIVE TECHNOLOGY Ltd. |
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