CN102760970B - Multi-antenna component - Google Patents
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- CN102760970B CN102760970B CN201210226283.2A CN201210226283A CN102760970B CN 102760970 B CN102760970 B CN 102760970B CN 201210226283 A CN201210226283 A CN 201210226283A CN 102760970 B CN102760970 B CN 102760970B
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Abstract
The invention provides a kind of multi-antenna component, this multi-antenna component comprises: for reflecting the electromagnetic reflecting medium surface that multi-antenna component uses; Be arranged at least two antenna element groups at least comprising two antenna elements on reflecting medium surface, the antenna element of antenna element group is angularly arranged at reflecting medium on the surface each other.The multi-antenna component that existing MIMO communication system of comparing adopts, described multi-antenna component comprises a public reflecting surface and arranges the some antenna elements of described public reflecting surface, make the type height number transfer rate performances such as described multi-antenna component is multiplexing based on applied wireless data transceiving control mode implementation space, space diversity, wave beam forming, can simultaneously at least two kinds of different electromagnetic wave resonance, thus provide a kind of based on IEEE? 802.11n the wireless high-speed mobile internet device of the agreement such as e, system and subsystem antenna module.
Description
Technical field
The present invention relates to wireless telecommunications system field, more particularly, relate to a kind of multi-antenna component and application thereof, as applied WIFI ceiling mount antenna, radio reception device, MIMO communication apparatus and the wireless routing device etc. that comprise in the interconnected communication system of wireless mobile.
Background technology
In wireless telecommunication system, user continues to improve to wireless telecommunication system data throughout, the QoS service quality of high request and the strong requirement of antijamming capability.As, in the communication systems such as IEEE802.11a/g/n, WAP (wireless access point) (AP) carrys out mutual data transmission between one or more wireless user equipment by wireless link.This wireless user equipment easily may be subject to change or interference etc. in other access point, other wireless communication apparatus, wireless link environment between this access point and this long-range acceptance point.This interference may make the transmission data capability of wireless link greatly reduce or the error rate greatly improves and QoS service is second-rate and cause user to stand.
Radio-based electronic devices such as portable computer and hand-hold electronic equipments become more and more popular.Such as these equipment has wireless communication ability usually.Such as, some electronic equipments can use long distance wireless communication circuit such as cell phone circuit, communicate to utilize the cellular telephone band of 850MHz, 900MHz, 1800MHz and 1900MHz (such as, main global system for mobile communications or the cellular frequency band of GSM).Also long distance wireless communication processing of circuit 2100MHZ frequency band and other frequency band can be used.Electronic equipment can use short-range wireless communication link to process the communication with neighbouring equipment.Such as, wireless telecommunications electronic equipment can use Bluetooth (bluetooth) frequency bands for communication of the Wi-Fi of 2.4GHz and 5GHz (IEEE802.11) frequency band (being sometimes called wireless local area network bands) and 2.4GHz.
Present especially based on IEEE802.11n the Wireless Mobile Internet high speed development of the agreement such as e, Wireless Mobile Internet equipment, system and subsystem propose the higher technical parameter requirement such as (yield value, standing wave and multiple antennas isolation parameter) to antenna module, and antenna also becomes restriction Wireless Mobile Internet equipment, system and the unified important technology bottleneck of subsystem.Therefore need the antenna of the improvement being provided for radio-based electronic devices, antenna module and application thereof, such as, its application comprises the application such as radio reception device, MIMO communication apparatus and wireless routing device.
Summary of the invention
The technical problem to be solved in the present invention is, improves the technical parameter requirement such as (yield value, standing wave and multiple antennas isolation parameter) of antenna module; And its application, as radio reception device, MIMO communication apparatus and wireless routing device overall performance (data uplink, downstream rate and throughput etc.).Therefore, the invention provides a kind of multi-antenna component that can be applied in MIMO communication device or indoor ceiling MIMO communication device.
A kind of multi-antenna component, comprising: for reflecting the electromagnetic reflecting medium surface that described multi-antenna component uses; Be arranged at least two antenna element groups at least comprising two antenna elements on described reflecting medium surface, the described antenna element of described antenna element group is angularly arranged at described reflecting medium on the surface each other.
Further, described reflecting medium surface comprises metal material obtains or adopts metallic netted structural or offers in metal surface porose obtained.
Further, described reflecting medium surface is covered Copper Foil medium substrate by single or double and is obtained.
Further, described medium substrate, at 1GHz operation at frequencies, has≤electrical loss tangent the amount of 0.0002.
Further, described reflecting medium arrange on the surface with the first antenna element group of first frequency electromagnetic wave resonance and with first frequency electromagnetic wave resonance second antenna element group.
Further, described first antenna element group comprises at least two the first identical antenna elements, and described second antenna element group comprises at least two the second identical antenna elements; Described first antenna element is similar to described second antenna element.
Further, described first antenna element adopts double loop antenna unit, described double loop antenna unit comprises a pair support column, the first annulus and the second annulus, described first annulus and the second annulus are arranged at same level and tangentially welding forms " ∞ " shape, described first annulus and the second annulus tangentially weld offer an opening, formation one feed end at the described opening two ends that distribute and a grounding parts.
Further, described in described first annulus girth, described second annulus, feed end is equal with the electromagnetic wavelength of described first frequency to the annulus length sum of described grounding parts.
Further, described first antenna element comprises the first regular polygon and second regular polygon of mutual welding, described first regular polygon ring and described second regular polygon weld offer an opening, described opening two ends form a feed end and a grounding parts, and the regular polygon length sum from described feed end to described grounding parts in described first regular polygon, described second regular polygon is equal with the electromagnetic wavelength of described first frequency.
Further, the size of described first regular polygon and the second regular polygon is identical and be rhombus.
The multi-antenna component that existing MIMO communication system of comparing adopts, described multi-antenna component comprises a public reflecting surface and arranges the some antenna elements of described public reflecting surface, make the type height number transfer rate performances such as described multi-antenna component is multiplexing based on applied wireless data transceiving control mode implementation space, space diversity, wave beam forming, simultaneously can at least two kinds of different electromagnetic wave resonance, thus provide a kind of based on IEEE802.11n the wireless high-speed mobile internet device of the agreement such as e, system and subsystem antenna module.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the schematic diagram of wireless mobile InterWorking Equipment application multi-antenna component of the present invention;
Fig. 2 is the illustraton of model of the execution mode of multi-antenna component one shown in Fig. 1;
Fig. 3 is the stereogram of a circular antenna unit in multi-antenna component shown in Fig. 2;
Fig. 4 is the illustraton of model of another execution mode of multi-antenna component shown in Fig. 1;
Fig. 5 is the stereogram of a rhombic aerial unit in multi-antenna component shown in Fig. 4.
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.
In order to meet the demand of user to the wireless device of the form factor of product, design dealer, providing enhancing functional while, is constantly devoted to the size of the parts reducing to use in such devices and ornamental industrial design profile.Especially providing ornamental industrial design profile product, in compact wireless device, meet required antenna performance standard is a kind of challenge.
Further, the built-in antenna of wireless mobile InterWorking Equipment changes into as a kind of market trend, is also to bring challenges in mechanism design, industrial design and Antenna Design various aspects to integration of equipments design dealer.As an example, arrange in the housing of the equipment such as wireless device such as indoor WIFI ceiling mount antenna, wireless routing device and WAP (wireless access point) (AP) and be applicable to antenna, built-in antenna layout designs also affects the layout such as mechanism assembly, pcb board and whole equipment industrial design Selection and Design in equipment.These wireless mobile InterWorking Equipments of existing market adopt externally positioned type antenna mostly, in the more fastidious situation of present consumer, especially industrial design affects very greatly consumer's purchase decision, therefore built-inization Antenna Design becomes market inner principles, is therefore considering that above-mentioned wireless mobile InterWorking Equipment is a factor considered emphatically.
Wireless mobile InterWorking Equipment built-in antenna seems especially have meaning, is described as an example in the present note, and the inner space of wireless mobile InterWorking Equipment is valuable and quite compact.The present invention is in conjunction with industrial design, mechanism design and Antenna Design various aspects wisdom, describe some compact enclosure interior layouts in detail to be conducive to built-in aerial and to play its optimum performance, to meet the requirement based on the Wireless Mobile Internet high speed interconnect communication of the home control network communication protocols such as IEEE802.11n/e.
Referring to Fig. 1, is the perspective diagram of wireless mobile InterWorking Equipment of the present invention.Radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14, power circuit 15 and multi-antenna component (comprising antenna element 20,30) that wireless mobile InterWorking Equipment comprises a housing 103 and is arranged in housing 103.Housing 103 inner space of wireless mobile InterWorking Equipment comprises the first inner space 100 and the second inner space 101 setting up and down, can with reflecting medium surface 10 for interface.Described radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14 and power circuit 15 to be incorporated on a pcb board and to arrange in the second inner space 101 of described housing 103, described multi-antenna component is arranged at the first inner space 100 of described housing 103, and is connected to radio circuit 11 respectively by coaxial line 105.Like this by the setting by mutual certain space distance of circuit part (comprising radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14 and power circuit 15) and multi-antenna component, to prevent multi-antenna component by circuit part electromagnetic interference, multi-antenna component built-inization and external antenna is made to reach same performance effect.
Wireless mobile InterWorking Equipment comprises radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14 and power circuit 15.Memory access 14 can comprise one or more dissimilar memory devices, such as hard disk drive storage devices, nonvolatile storage are (such as, flash memory or other EPROM), volatile memory (such as, static or dynamic random access memory) etc.The operation of wireless mobile InterWorking Equipment is can be used at baseband signal processing unit 12.Baseband signal processing unit 12 can based on such as microprocessor and other integrated circuit be applicable to.Adopt a kind of applicable layout, the software that memory access 14 stores can be used to the software on wireless mobile InterWorking Equipment, such as GPRS agreement etc., for controlling the controlling functions etc. of radio-frequency power amplifier and other radio-frequency transceiver circuitry.
Radio circuit 11 can comprise radio frequency (RF) transceiver circuit, power amplifier circuit, low noise input amplifier, passive RF assembly, one or more antenna and other circuit for the treatment of RF wireless signal of being formed by one or more integrated circuit.Can also make to use up and send wireless signal (such as, using infrared communication).
In other embodiments, described radio circuit 11 also can comprise the transceiver circuit processing 2.4GHz and 5GHz frequency band and the 2.4GHz Bluetooth communication frequency band communicated for WiFi (IEEE802.11).Radio circuit 11 can also comprise cell phone transceiving radio frequency circuit, for the treatment of the radio communication of cellular telephone band, and the GSM frequency band of such as 850MHz, 900MHz, 1800MHz and 1900MHz and the frequency ranges of data (as an example) of 2100MHz.If needed, described radio circuit 11 can comprise the circuit for other short distance and long distance wireless link.Such as radio circuit 11 can comprise global positioning system (GPS) receiver device, radio-circuit, call circuit etc. for received RF and TV signal.In WiFi and Bluetooth link and other short range links, general use wireless signal tens or hundreds of foot scope in transmit data.In cellular phone link or other long-distance link, the general wireless signal that uses transmits data in the scope of several thousand feet or several miles.
Referring to Fig. 2, is the illustraton of model of multi-antenna component one execution mode of the present invention, described multi-antenna component comprises a reflecting medium surface 10, to be fixed on described reflecting medium surface 10 first, second antenna element group, described first, second antenna element group correspondence comprises three the first antenna elements 20, second antenna element 30, first antenna element 20, second antenna element 30 is angularly arranged on described reflecting medium surface 10 each other, first antenna element 20, second antenna element 30 all adopts double loop antenna unit, first antenna element 20 is similar with the second antenna element 30, namely the first antenna element 20 is identical with the shape of the second antenna element 30, just distinct dimensionally, make the first antenna element 20, second antenna element 30 respectively can with first frequency electromagnetic wave and second frequency electromagnetic wave resonance.The double loop antenna unit of the first antenna element 20 comprises a pair support column 23, first annulus 21 and the second annulus 22, described first annulus 21 and the second annulus 22 is arranged at same level and tangentially welding forms " ∞ " shape.The double loop antenna unit of the second antenna element 30 comprises a pair support column 33, first annulus 31 and the second annulus 32, described first annulus 31 and the second annulus 32 is arranged at same level and tangentially welding forms " ∞ " shape.
The electromagnetic wave that described reflecting medium surface 10 uses for reflecting described multi-antenna component.The electromagnetic wave that the electromagnetic wave wherein used refers to the electromagnetic wave that each antenna element comprising described multi-thread assembly produces or receives at each antenna element.
In certain embodiments, described reflecting medium surface 10 arranges and is layed on the surface of flat panel substrates, and namely described reflecting medium surface 10 is plane and adopts copper or other electric conducting material to make.In other execution modes, described reflecting medium surface 10 can a nonplanar surface.Be understandably, reflecting medium surface 10 can have discrete point, be processed into network structure as reflecting medium surface 10 or offer the dielectric surface that the mode such as porose realizes reflection wave function, wherein the size in network structure or hole is less than 1/10th of the electromagnetic wavelength that described multi-antenna component uses.In the present embodiment, reflecting medium surface 10 is made up of metal material, and the substrate surface that namely conductive metallic material is obtained becomes described reflecting medium surface 10.
In other embodiments, described reflecting medium surface 10 can be selected single or double to cover Copper Foil medium substrate to be processed to form, described single or double covers Copper Foil medium substrate at 1GHz operation at frequencies, has≤nominal dielectric constant of 4.0 and the electrical loss tangent amount of≤0.0002.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.
Referring to Fig. 3, is the stereogram of one second antenna element 30 double loop antenna unit in multi-antenna component.In the present embodiment, described antenna element 30 comprises a pair support column 33, first annulus 31 and the second annulus 32.Described first annulus 31 and the second annulus 32 is arranged at same level and tangentially welding forms " ∞ " shape.Described first annulus 31 and the second annulus 32 tangentially weld offer an opening 330, formation one feed end 310 at described opening 330 two ends that distribute and a grounding parts 320.Described support column 33 is welded in the two ends of described " ∞ " shape respectively.Described first annulus 31, second annulus 32 is equal with second frequency electromagnetic wavelength to the length sum of grounding parts 320 annulus from the feed end 310 of opening 330.
In the present embodiment, the size of described first annulus 31 and the second annulus 32 is identical and be toroidal.In other embodiments, the size of described first annulus 31 and the second annulus 32 is not identical; Or described first annulus 31 is toroidal, the second annulus 32 is elliptical shape; Or described first annulus 31 and the second annulus 32 are elliptical shape.
Referring to Fig. 4 and Fig. 5, is the illustraton of model of another execution mode of multi-antenna component of the present invention, described multi-antenna component comprises a reflecting medium surface 10, to be fixed on described reflecting medium surface 10 first, second antenna element group, described first, second antenna element group correspondence comprises three the first antenna elements 40, second antenna element 50, first antenna element 40, second antenna element 50 is angularly arranged on described reflecting medium surface 10 each other, first antenna element 40, second antenna element 50 all adopts double rhombic antenna unit, first antenna element 40 is similar with the second antenna element 50, namely the first antenna element 40 is identical with the shape of the second antenna element 50, just distinct dimensionally, make the first antenna element group, second antenna element group respectively with first frequency electromagnetic wave and second frequency electromagnetic wave resonance.First antenna element 40 comprises a pair support column 43, first regular polygon 41 and the second regular polygon 42, described first regular polygon 41 and the second regular polygon 42 is arranged at same level and tangentially welding is formed
shape.Second antenna element 50 comprises a pair support column 53, first regular polygon 51 and the second regular polygon 52.Described first regular polygon 51 and the second regular polygon 52 are arranged at same level and welding mutually.An opening 530 is offered, formation one feed end 510 at described opening 530 two ends that distribute and a grounding parts 520 at described first regular polygon 51 and the mutual weld of the second regular polygon 52.Described first regular polygon 51, second regular polygon 52 is equal with second frequency electromagnetic wavelength to the length sum of grounding parts 520 regular polygon from the feed end 510 of opening 530.
In the present embodiment, the rhombus that the size of described first regular polygon 51 and the second regular polygon 52 is identical, the mutual welding of described two rhombuses is formed
shape.Described in described support column 53 is welded in respectively
the two ends of shape.In other embodiments, described first regular polygon 51 and the second regular polygon 52 can also adopt the regular polygon at least comprising three limits, as polygons such as triangle, quadrangle, pentagons.
Described multi-antenna component comprises a public reflecting surface and arranges the some antenna elements of described public reflecting surface, is then mutually isolated by some antenna elements.Make the type height number transfer rate performances such as described multi-antenna component is multiplexing based on applied wireless data transceiving control mode implementation space, space diversity, wave beam forming.Thus provide a kind of based on IEEE802.11n the wireless high-speed mobile internet device of the agreement such as e, system and subsystem antenna module.
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 (10)
1. a multi-antenna component, it is characterized in that, comprise: for reflecting the electromagnetic reflecting medium surface that described multi-antenna component uses, the electromagnetic wave of described use is the electromagnetic wave that each antenna element comprising described multi-antenna component produces or the electromagnetic wave received at each antenna element, be arranged at and described reflecting medium surface at least comprises the identical and at least two antenna element groups of two antenna elements that size is different of shape, the described antenna element of described antenna element group is angularly arranged at described reflecting medium on the surface each other, described reflecting medium surface is covered Copper Foil medium substrate by single or double and is obtained, described medium substrate comprises glass-fiber-fabric, epoxy resin, with the compound of described epoxy resin generation cross-linking reaction, wherein, described medium substrate has adsorbed the first component and second component in infiltration solution at glass-fiber-fabric, after baking, prepreg or cured sheets is cross-linked to form to make the first component and the mutual chemical combination of second component.
2. multi-antenna component according to claim 1, is characterized in that, the first component in described infiltration solution comprises epoxy resin, and the second component in described infiltration solution comprises the compound with described epoxy resin generation cross-linking reaction.
3. multi-antenna component according to claim 1, is characterized in that, described reflecting medium surface comprises metal material is obtained or adopt metallic netted structural or offer in metal surface porose obtained.
4. multi-antenna component according to claim 1, is characterized in that, described medium substrate, at 1GHz operation at frequencies, has≤electrical loss tangent the amount of 0.0002.
5. the multi-antenna component according to claim 3 or 4, is characterized in that, described reflecting medium arrange on the surface with the first antenna element group of first frequency electromagnetic wave resonance and with second frequency electromagnetic wave resonance second antenna element group.
6. multi-antenna component according to claim 5, is characterized in that, described first antenna element group comprises at least two the first identical antenna elements, and described second antenna element group comprises at least two the second identical antenna elements; Described first antenna element is similar to described second antenna element.
7. multi-antenna component according to claim 6, it is characterized in that, described first antenna element adopts double loop antenna unit, described double loop antenna unit comprises a pair support column, the first annulus and the second annulus, described first annulus and the second annulus are arranged at same level and tangentially welding forms " ∞ " shape, described first annulus and the second annulus tangentially weld offer an opening, formation one feed end at the described opening two ends that distribute and a grounding parts.
8. multi-antenna component according to claim 7, is characterized in that, described in described first annulus girth, described second annulus, feed end is equal with the electromagnetic wavelength of described first frequency to the annulus length sum of described grounding parts.
9. multi-antenna component according to claim 6, it is characterized in that, described first antenna element comprises the first regular polygon and second regular polygon of mutual welding, described first regular polygon ring and described second regular polygon weld offer an opening, described opening two ends form a feed end and a grounding parts, and the regular polygon length sum from described feed end to described grounding parts in described first regular polygon, described second regular polygon is equal with the electromagnetic wavelength of described first frequency.
10. multi-antenna component according to claim 9, is characterized in that, the size of described first regular polygon and the second regular polygon is identical and be rhombus.
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| CN110690545B (en) * | 2019-09-19 | 2020-11-27 | 湖州达立智能设备制造有限公司 | Indoor MIMO ceiling antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201359732Y (en) * | 2009-03-02 | 2009-12-09 | 广东纺织职业技术学院 | Code reader for identity card based on RFID technology |
| CN101895017A (en) * | 2009-05-20 | 2010-11-24 | 旭丽电子(广州)有限公司 | Built-in multi-antenna module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8059041B2 (en) * | 2009-06-04 | 2011-11-15 | San Wen (H.K.) International Co., Ltd. | Diamond-shaped antenna receiving device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201359732Y (en) * | 2009-03-02 | 2009-12-09 | 广东纺织职业技术学院 | Code reader for identity card based on RFID technology |
| CN101895017A (en) * | 2009-05-20 | 2010-11-24 | 旭丽电子(广州)有限公司 | Built-in multi-antenna module |
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Effective date of registration: 20210811 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. |