CN102760970A - Multi-antenna assembly - Google Patents
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- CN102760970A CN102760970A CN2012102262832A CN201210226283A CN102760970A CN 102760970 A CN102760970 A CN 102760970A CN 2012102262832 A CN2012102262832 A CN 2012102262832A CN 201210226283 A CN201210226283 A CN 201210226283A CN 102760970 A CN102760970 A CN 102760970A
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Abstract
The invention provides a multi-antenna assembly. The multi-antenna assembly comprises a reflection medium surface for reflecting electromagnetic waves for the multi-antenna assembly, and at least two antenna unit groups which are arranged on the reflection medium surface and at least comprise two antenna units, wherein the antenna units of each antenna unit group are arranged on the reflection medium surface in an equal angle manner. Compared with the multi-antenna assembly adopted by the existing MIMO (Multiple Input Multiple Output) communication system, the multi-antenna assembly comprises a public reflection surface and a plurality of antenna units arranged on the public reflection surface, so that the multi-antenna assembly realizes high data transmissibility performances including space multiplex, space diversity, wave beam forming and the like based on an applied wireless data receiving-transmitting control manner; and meanwhile, the multi-antenna assembly performs resonance on at least two different electromagnetic waves, thus providing wireless high-speed mobile internet equipment and system as well as a subsystem antenna assembly, which are based on protocols including IEEE (Institute of Electrical and Electronic Engineers) 802.11n\e and the like.
Description
Technical field
The present invention relates to the wireless telecommunications system field, more particularly, relate to a kind of many antenna modules and application thereof, comprise wireless WIFI ceiling mount antenna, radio reception device, MIMO communication apparatus and the wireless routing device etc. that move in the interconnected communication system like application.
Background technology
In the wireless telecommunication system, the user continues the QoS service quality and the strong requirement of antijamming capability of raising, high request to the wireless telecommunication system data throughout.As, in communication systems such as IEEE802.11a/g/n, WAP (AP) comes and a perhaps mutual data transmission between more wireless user equipments through Radio Link.This wireless user equipment possibly receive variation or interference in other access point, other wireless communication apparatus, the wireless link environment between this access point and this long-range acceptance point etc. easily.This interference possibly make the transmission data capability of Radio Link reduce greatly or the error rate greatly improves and QoS service quality is relatively poor and cause the user to stand.
Radio-based electronic devices for example portable computer and hand-hold electronic equipments becomes more and more popular.Equipment such as these has wireless communication ability usually.For example; Some electronic equipments can use for example cell phone circuit of long distance wireless communication circuit; With the cellular telephone band of utilizing 850MHz, 900MHz, 1800MHz and 1900MHz (for example, main global system for mobile communications or the cellular frequency band of GSM) communication.Also can use long distance wireless communication processing of circuit 2100MHZ frequency band and other frequency band.Electronic equipment can use short-range wireless communication link to handle and near equipment communicate by letter.For example, the wireless telecommunications electronic equipment can use Wi-Fi (IEEE 802.11) frequency band (being called the WLAN frequency band sometimes) of 2.4GHz and 5GHz and Bluetooth (bluetooth) frequency band of 2.4GHz to communicate.
Especially now based on IEEE e etc. the wireless mobile Internet high speed development of agreement; Wireless mobile internet device, system and subsystem propose higher technical parameter (parameters such as yield value, standing wave and many isolation between antennas) requirement to antenna module, and antenna also becomes the unified important technology bottleneck of the wireless mobile internet device of restriction, system and subsystem.Therefore need be provided for improved antenna, antenna module and the application thereof of radio-based electronic devices, for example, its application comprises application such as radio reception device, MIMO communication apparatus and wireless routing device.
Summary of the invention
The technical problem that the present invention will solve is, improves technical parameter (parameters such as yield value, standing wave and the many isolation between antennas) requirement of antenna module; With and use, like radio reception device, MIMO communication apparatus and wireless routing device overall performance (data uplink, downstream rate and throughput etc.).Therefore, the present invention provides a kind of many antenna modules that can be applied in MIMO communication device or the indoor suction top MIMO communication device.
A kind of many antenna modules comprise: be used to reflect the electromagnetic reflecting medium surface that said many antenna modules use; Be arranged at the lip-deep at least two antenna element groups that comprise two antenna elements at least of said reflecting medium, the said antenna element of said antenna element group equal angles each other is arranged on the said reflecting medium surface.
Further, said reflecting medium surface is made, or is adopted metal net shaped structure, or offers porose making in the metal surface by metal material.
Further, said reflecting medium surface is covered the Copper Foil medium substrate by single or double and is made.
Further, said medium substrate is worked under the 1GHz frequency, has≤0.0002 electrical loss tangent amount.
Further, be provided with on the said reflecting medium surface with the first antenna element group of first frequency electromagnetic wave resonance and with the first frequency electromagnetic wave resonance second antenna element group.
Further, the said first antenna element group comprises at least two identical first antenna elements, and the said second antenna element group comprises at least two identical second antenna elements; Said first antenna element is similar with said second antenna element.
Further; Said first antenna element adopts the double loop antenna unit; Said double loop antenna unit comprises a pair of support column, first annulus and second annulus; Said first annulus and second annulus are arranged at same horizontal plane and the welding of tangent ground forms " ∞ " shape, offers an opening at said first annulus and second tangent ground of the annulus weld, formation one feed end and a grounding parts at the said opening two ends that distribute.
Further, feed end described in the said first annulus girth, said second annulus equates with the electromagnetic wavelength of said first frequency to the annulus length sum of said grounding parts.
Further; Said first antenna element comprises first regular polygon and second regular polygon of mutual welding; Said first regular polygon ring and the said second regular polygon weld are offered an opening; Said opening two ends form a feed end and a grounding parts, and the regular polygon length sum from said feed end to said grounding parts in said first regular polygon, said second regular polygon equates with the electromagnetic wavelength of said first frequency.
Further, said first regular polygon and second regular polygon big or small identical and be rhombus.
Many antenna modules that the existing MIMO communication system of comparing adopts; Said many antenna modules comprise a public reflecting surface and the some antenna elements of said public reflecting surface are set; Make the high number transfer rate of type performances such as said many antenna modules are multiplexing based on applied wireless data transceiving control mode implementation space, space diversity, wave beam forming; Simultaneously can be at least two kinds of different electromagnetic wave resonance, thus provide a kind of based on IEEE e etc. wireless high-speed mobile internet device, system and the subsystem antenna module of agreement.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below:
Fig. 1 uses the sketch map of many antenna modules for the wireless mobile InterWorking Equipment of the present invention;
Fig. 2 is the illustraton of model of many antenna modules one execution mode shown in Figure 1;
Fig. 3 is the stereogram of a circular antenna unit in many antenna modules shown in Figure 2;
Fig. 4 is the illustraton of model of many another execution modes of antenna module shown in Figure 1;
Fig. 5 is the stereogram of a rhombic aerial unit in many antenna modules shown in Figure 4.
Embodiment
Now in detail with reference to the embodiment that describes in the accompanying drawing.For complete understanding the present invention, numerous details in following detailed description, have been mentioned.But it should be appreciated by those skilled in the art that the present invention can need not these details and realize.In other embodiments, be not described in detail known method.Process, assembly and circuit are in order to avoid unnecessarily make embodiment fuzzy.
In order to satisfy the demand of user to the wireless device of the form factor of product, the dealer is in functional while that enhancing is provided in design, constantly is devoted to reduce the size and the ornamental industrial design profile of the parts that in these equipment, use.Especially ornamental industrial design profile product is being provided, in the wireless device of compactness, satisfying required antenna performance standard is a kind of challenge.
Further, built-in the changing into of the antenna of wireless mobile InterWorking Equipment is a kind of market trend, also is to bring challenges in mechanism design, industrial design and Antenna Design various aspects to the integrated design dealer of equipment.As an example; Arrange in the housing of the for example indoor WIFI ceiling mount antenna of wireless device, wireless routing device and WAP equipment such as (AP) to be fit to antenna, the built-in layout designs of antenna also affects layout and entire equipment industrial design Selection and Design such as mechanism assembly, pcb board in the equipment.These wireless mobile InterWorking Equipments of existing market adopt the externally positioned type antenna mostly; In the present more fastidious situation of consumer; Especially industrial design affects consumer's purchase decision very greatly; Therefore built-inization Antenna Design becomes the inherent actuating force in market, is therefore considering that above-mentioned wireless mobile InterWorking Equipment is a factor of considering emphatically.
Wireless mobile built-inization of InterWorking Equipment antenna seems especially have meaning, in this explanation, is described as an example, and the inner space of wireless mobile InterWorking Equipment is valuable and quite compact.The present invention combines industrial design, mechanism design and Antenna Design various aspects wisdom; Specify some compact enclosure interior layouts and help its optimum performance of built-in aerial performance, to satisfy requirement based on the interconnected communication of wireless mobile Internet high speed of home control network communication protocols such as IEEE 802.11n/e.
See also Fig. 1, be the perspective diagram of the wireless mobile InterWorking Equipment of the present invention.Wireless mobile InterWorking Equipment comprises a housing 103 and radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14, power circuit 15 and the many antenna modules (comprising antenna element 20,30) that are arranged in the housing 103.Housing 103 inner spaces of wireless mobile InterWorking Equipment comprise first inner space 100 and second inner space 101 that is provided with up and down, can be interface with reflecting medium surface 10.Said radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14 and power circuit 15 are incorporated on the pcb board and are provided with in second inner space 101 of said housing 103; Said many antenna modules are arranged at first inner space 100 of said housing 103, and are connected to radio circuit 11 through coaxial line 105 respectively.Like this with the setting of circuit part (comprising radio circuit 11, baseband signal processing unit 12, control unit 13, memory access 14 and power circuit 15) and many antenna modules through mutual certain space distance; To prevent many antenna modules, make many built-inization of antenna module and external antenna reach the same performance effect by the circuit part electromagnetic interference.
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 the memory device that one or more are dissimilar; Such as hard disk drive storage devices, nonvolatile storage (for example; Flash memory or other EPROM), volatile memory (for example, static state or dynamic random access memory) etc.Can be used for the operation of wireless mobile InterWorking Equipment at baseband signal processing unit 12.Baseband signal processing unit 12 can be based on the integrated circuit that is fit to such as microprocessor and other.Adopt a kind of suitable layout, the software that memory access 14 stores can be used to the software on the wireless mobile InterWorking Equipment, such as the GPRS agreement etc., is used to control radio-frequency power amplifier and other RF transceiver circuit control function etc.
Radio circuit 11 can comprise radio frequency (RF) transceiver circuit, power amplifier circuit, low noise input amplifier, passive RF assembly, the one or more antenna that is formed by one or more integrated circuits and other circuit that is used for the processing RF wireless signal.Can also make to use up and send wireless signal (for example, using infrared communication).
In other embodiments, said radio circuit 11 can comprise that also processing is used for the 2.4GHz of WiFi (IEEE 802.11) communication and the transceiver circuit of 5GHz frequency band and 2.4GHz Bluetooth communication frequency band.Radio circuit 11 can also comprise cell phone transmitting-receiving radio circuit, is used to handle the radio communication of cellular telephone band, for example the frequency ranges of data (as an example) of the GSM frequency band of 850MHz, 900MHz, 1800MHz and 1900MHz and 2100MHz.If desired, said radio circuit 11 can comprise and is used for other short distance and long circuit apart from Radio Link.For example radio circuit 11 can comprise global positioning system (GPS) receiver device, the radio-circuit that is used for received RF and TV signal, call circuit etc.In WiFi and Bluetooth link and other short range links, generally use wireless signal tens or the scope of hundreds of foot in transmit data.In cellular phone link or other long-distance link, generally use wireless signal in the scope of several thousand feet or several miles, to transmit data.
Seeing also Fig. 2, is the illustraton of model of many antenna modules one execution mode of the present invention; Said many antenna modules comprise reflecting medium surface 10, are fixed in first, second antenna element group on the said reflecting medium surface 10; Said first, second antenna element group correspondence comprises three first antenna elements 20, second antenna element 30; First antenna element 20, second antenna element 30 equal angles each other are arranged on the said reflecting medium surface 10; First antenna element 20, second antenna element 30 all adopt the double loop antenna unit; First antenna element 20 is similar with second antenna element 30; Just first antenna element 20 is identical with the shape of second antenna element 30, and is just distinct dimensionally, make win 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 first antenna element 20 comprises a pair of support column 23, first annulus 21 and second annulus 22, and said first annulus 21 and second annulus 22 are arranged at same horizontal plane and the welding of tangent ground forms " ∞ " shape.The double loop antenna unit of second antenna element 30 comprises a pair of support column 33, first annulus 31 and second annulus 32, and said first annulus 31 and second annulus 32 are arranged at same horizontal plane and the welding of tangent ground forms " ∞ " shape.
Said reflecting medium surface 10 is used to reflect the electromagnetic wave that said many antenna modules use.Use therein electromagnetic wave is meant the electromagnetic wave of each antenna element generation that comprises said multi-thread assembly or the electromagnetic wave that receives at each antenna element.
In certain embodiments, said reflecting medium surface 10 is provided with and is layed on the surface of flat panel substrates, and promptly said reflecting medium surface 10 is plane and adopts copper or other electric conducting material to process.In other execution modes, said reflecting medium surface 10 can a nonplanar surface.Be with being appreciated that; Reflecting medium surface 10 can have discrete point; Be processed into network structure or offer the dielectric surface that mode such as porose realizes the reflection wave function like reflecting medium surface 10, wherein 1/10th of the electromagnetic wavelength that uses less than said many antenna modules of the size in network structure or hole.In the present embodiment, reflecting medium surface 10 is processed by metal material, and promptly the substrate surface that makes of conductive metallic material becomes said reflecting medium surface 10.
In other embodiments; Said reflecting medium surface 10 can be selected single or double to cover the Copper Foil medium substrate to be processed to form; Said single or double covers the Copper Foil medium substrate works under the 1GHz frequency, has≤4.0 nominal dielectric constant and≤0.0002 electrical loss tangent amount.Said medium substrate comprises glass cloth, epoxy resin and comprises the compound with said epoxy resin generation cross-linking reaction.Said medium substrate first kind execution mode is following:
Said medium substrate manufacture craft is following: at first, provide an infiltration solution to comprise: first component includes epoxy resin; Second component comprises the compound with said epoxy resin generation cross-linking reaction; And one or more solvents.Wherein first component and second component dispose mixing according to a certain percentage.
Said infiltration solution is through stirring the back, will a said glass cloth soaking into first component and second component are adsorbed in the glass cloth perhaps on the surface; Baking is copied said glass cloth and is made said one or more solvent evaporates then, and makes first component and the mutual chemical combination of second component be cross-linked to form prepreg or cured sheets.Prepreg is meant to be copied the glass cloth of absorption first component and second component in the relatively low environment of temperature in baking, and first component comprises the soft mixture that the chemical combination cross-linking reaction partly takes place for epoxy resin and the second component inclusion compound.Solidfied material be meant with the glass cloth of absorption first component and second component baking copy temperature relatively than high ambient in, first component comprises the relative harder mixture that the chemical combination cross-linking reaction partly takes place for epoxy resin and the second component inclusion compound.
In this execution mode; The glass cloth of said infiltration forms semi-solid preparation thing (in the form of sheets) through low-temperature bake; Said then semi-solid preparation thing is cut into cuts out sheet, and it is superimposed and be hot pressed into this and implement described multilayer dielectricity substrate (being multilayer layer pressing plate or sheet) according to the thickness needs said multi-disc to be cut out sheet.
In concrete embodiment, the compound of said second component can be selected the copolymer that comprises by polarity macromolecule and non-polar high polymer chemical combination for use, like styrene maleic anhydride copolymer.It is understandable that, can all can be used for the prescription composition of this execution mode with the copolymer of epoxy resin generation chemical combination cross-linking reaction.The styrene maleic anhydride copolymer of this execution mode wherein, its molecular formula is following:
In above-mentioned styrene maleic anhydride copolymer molecular formula, comprise 4 styrene.In other embodiments, can select corresponding molecular weight, as comprising 6,8 styrene or any number in the styrene maleic anhydride copolymer molecular formula.Epoxy resin is the organic high molecular compound that contains two or more epoxide groups in the general reference molecule.
In other embodiment, the mixture that the compound of said second component can also be selected the cyanate performed polymer for use or select for use styrene maleic anhydride copolymer and cyanate performed polymer to mix according to arbitrary proportion.
In concrete embodiment, said epoxy resin and styrene maleic anhydride copolymer are prepared according to the ratio of sense value, add the certain amount of solvent wiring solution-forming then.Said epoxy resin and styrene maleic anhydride copolymer hybrid technique adopt conventional equipment to process; Like common agitator and agitated reactor epoxy resin is evenly mixed with styrene maleic anhydride copolymer, thereby the epoxy resin in the said solution is evenly mixed with styrene maleic anhydride copolymer.
In concrete embodiment; Impel gel in above-mentioned infiltration solution 200-400 time second (selecting 171 ℃ of gel ambient temperatures for use) through adding certain promoter, promote wherein about the above-mentioned 260 seconds infiltration solution gelatinizing time that (like 258-260 second or 250-270 second etc.) effect is better.Said promoter can be selected for use and included but not limited to tertiary amines, any one type or mixture between them in imidazoles and the boron trifluoride mono aminoethane.
Said one or more solvents can be selected for use and include but not limited to acetone, butanone, N, mix the mixed solvent that forms in dinethylformamide, EGME, the toluene between any one or the above-mentioned two or more solvent.
See also Fig. 3, be the stereogram of one second antenna element, 30 double loop antenna unit in many antenna modules.In this execution mode, said antenna element 30 comprises a pair of support column 33, first annulus 31 and second annulus 32.Said first annulus 31 and second annulus 32 are arranged at same horizontal plane and the welding of tangent ground forms " ∞ " shape.Offer an opening 330 at said first annulus 31 and second annulus, 32 tangent ground welds, formation one feed end 310 and a grounding parts 320 at said opening 330 two ends that distribute.Said support column 33 is welded in the two ends of said " ∞ " shape respectively.Said first annulus 31, the second annulus 32 length sum from the feed end 310 of opening 330 to grounding parts 320 annulus equates with the second frequency electromagnetic wavelength.
In this execution mode, said first annulus 31 and second annulus 32 big or small identical and be toroidal.In other embodiments, said first annulus 31 and second annulus 32 is big or small inequality; Or said first annulus 31 is toroidal, and second annulus 32 is an elliptical shape; Or said first annulus 31 and second annulus 32 are elliptical shape.
Seeing also Fig. 4 and Fig. 5, is the illustraton of model of many another execution modes of antenna module of the present invention; Said many antenna modules comprise reflecting medium surface 10, are fixed in first, second antenna element group on the said reflecting medium surface 10; Said first, second antenna element group correspondence comprises three first antenna elements 40, second antenna element 50; First antenna element 40, second antenna element 50 equal angles each other are arranged on the said reflecting medium surface 10; First antenna element 40, second antenna element 50 all adopt the double rhombic antenna unit; First antenna element 40 is similar with second antenna element 50; Just first antenna element 40 is identical with the shape of second antenna element 50, and is just distinct dimensionally, make the antenna element group of winning, the second antenna element group respectively with first frequency electromagnetic wave and second frequency electromagnetic wave resonance.First antenna element 40 comprises a pair of support column 43, first regular polygon 41 and second regular polygon 42, and said first regular polygon 41 and second regular polygon 42 are arranged at same horizontal plane and the welding of tangent ground forms
shape.Second antenna element 50 comprises a pair of support column 53, first regular polygon 51 and second regular polygon 52.Said first regular polygon 51 and second regular polygon 52 are arranged at same horizontal plane and welding each other.Offer an opening 530, formation one feed end 510 and a grounding parts 520 at said opening 530 two ends that distribute at said first regular polygon 51 and second regular polygon, 52 mutual welds.Said first regular polygon 51, the second regular polygon 52 length sum from the feed end 510 of opening 530 to grounding parts 520 regular polygons equates with the second frequency electromagnetic wavelength.
In this execution mode; The big or small identical rhombus of said first regular polygon 51 and second regular polygon 52, the mutual welding of said two rhombuses forms
shape.The two ends of said support column 53 is welded in respectively said
shape.In other embodiments, said first regular polygon 51 and second regular polygon 52 can also adopt the regular polygon that comprises three limits at least, like polygons such as triangle, quadrangle, pentagons.
Said many antenna modules comprise a public reflecting surface and the some antenna elements of said public reflecting surface are set, then some antenna elements isolated each other.Make the high number transfer rate of type performances such as said many antenna modules are multiplexing based on applied wireless data transceiving control mode implementation space, space diversity, wave beam forming.Thereby provide a kind of based on IEEE e etc. wireless high-speed mobile internet device, system and the subsystem antenna module of agreement.
Combine accompanying drawing that embodiments of the invention are described above; But the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. antenna module more than a kind is characterized in that, comprising:
Be used to reflect the electromagnetic reflecting medium surface that said many antenna modules use;
Be arranged at the lip-deep at least two antenna element groups that comprise two antenna elements at least of said reflecting medium, the said antenna element of said antenna element group equal angles each other is arranged on the said reflecting medium surface.
2. many antenna modules according to claim 1 is characterized in that, said reflecting medium surface is made, or adopted metal net shaped structure, or offers porose making in the metal surface by metal material.
3. many antenna modules according to claim 1 is characterized in that, said reflecting medium surface is covered the Copper Foil medium substrate by single or double and made.
4. many antenna modules according to claim 3 is characterized in that said medium substrate is worked under the 1GHz frequency, have≤0.0002 electrical loss tangent amount.
5. according to claim 2 or 4 described many antenna modules, it is characterized in that, be provided with on the said reflecting medium surface with the first antenna element group of first frequency electromagnetic wave resonance and with the first frequency electromagnetic wave resonance second antenna element group.
6. many antenna modules according to claim 5 is characterized in that, the said first antenna element group comprises at least two identical first antenna elements, and the said second antenna element group comprises at least two identical second antenna elements; Said first antenna element is similar with said second antenna element.
7. many antenna modules according to claim 6; It is characterized in that; Said first antenna element adopts the double loop antenna unit, and said double loop antenna unit comprises a pair of support column, first annulus and second annulus, and said first annulus and second annulus are arranged at same horizontal plane and the welding of tangent ground forms " ∞ " shape; Offer an opening at said first annulus and second tangent ground of the annulus weld, formation one feed end and a grounding parts at the said opening two ends that distribute.
8. many antenna modules according to claim 7 is characterized in that, feed end described in the said first annulus girth, said second annulus equates with the electromagnetic wavelength of said first frequency to the annulus length sum of said grounding parts.
9. many antenna modules according to claim 6; It is characterized in that; Said first antenna element comprises first regular polygon and second regular polygon of mutual welding; Said first regular polygon ring and the said second regular polygon weld are offered an opening, and said opening two ends form a feed end and a grounding parts, and the regular polygon length sum from said feed end to said grounding parts in said first regular polygon, said second regular polygon equates with the electromagnetic wavelength of said first frequency.
10. many antenna modules according to claim 9 is characterized in that, said first regular polygon and second regular polygon big or small identical and be rhombus.
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| CN201210226283.2A CN102760970B (en) | 2012-07-03 | 2012-07-03 | Multi-antenna component |
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| CN201210226283.2A CN102760970B (en) | 2012-07-03 | 2012-07-03 | Multi-antenna component |
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| CN102760970A true CN102760970A (en) | 2012-10-31 |
| CN102760970B CN102760970B (en) | 2016-01-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690545A (en) * | 2019-09-19 | 2020-01-14 | 惠安耐亚节能科技有限公司 | Indoor MIMO ceiling antenna |
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| CN101895017A (en) * | 2009-05-20 | 2010-11-24 | 旭丽电子(广州)有限公司 | Built-in multi-antenna module |
| US20100309062A1 (en) * | 2009-06-04 | 2010-12-09 | Ming Wen Chang | Diamond-shaped antenna receiving device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| US20100309062A1 (en) * | 2009-06-04 | 2010-12-09 | Ming Wen Chang | Diamond-shaped antenna receiving device |
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| CN110690545A (en) * | 2019-09-19 | 2020-01-14 | 惠安耐亚节能科技有限公司 | Indoor MIMO ceiling antenna |
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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. |