CN201590479U - Non-contact antenna, antenna array and smart card - Google Patents
Non-contact antenna, antenna array and smart card Download PDFInfo
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- CN201590479U CN201590479U CN 200920278141 CN200920278141U CN201590479U CN 201590479 U CN201590479 U CN 201590479U CN 200920278141 CN200920278141 CN 200920278141 CN 200920278141 U CN200920278141 U CN 200920278141U CN 201590479 U CN201590479 U CN 201590479U
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Abstract
The utility model discloses a non-contact antenna, an antenna array and a smart card and relates to the technical field of communication and is designed in order to increase the communication distance and reduce the antenna dimension. The non-contact antenna comprises an inductance coil which consists of at least two layers of stacked coils, an insulating dielectric layer is arranged between every two adjacent layers of coils, which are in feed connection after passing through the insulating dielectric layer. The utility model also discloses a non-contact antenna array and a smart card. The utility model can be used in a radio frequency identification system.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of contactless antenna, antenna sets and smart card.
Background technology
Smart card claims IC-card again, generally has two kinds: Contact Type Ic Card and non-contact IC card.Wherein, Contact Type Ic Card obtains energy and carries out exchanges data by mechanical contact, and non-contact IC card is called radio-frequency card, obtains energy and carries out exchanges data by the aerial coil induction.And at present along with deepening continuously that intellective IC card is used, double-interface smart card has been subjected to paying close attention to widely.Double-interface smart card not only has traditional contact interface, can also carry out twireless radio-frequency communication by antenna as other non-contact IC cards.Double-interface smart card is owing to have two working interfaces, particularly its non-contact application mode is easy to use, quick, so use more extensive, particularly be applied to embedded device realization mobile payment, authentications etc. such as mobile phone, these application will offer convenience to people's life.
No matter in non-contact IC card still was double-interface smart card, on contactless working interface, antenna played the important function of obtaining energy and carrying out exchanges data as radio-frequency front-end, is the indispensable core tie that carries out information communication.
At present, contactless and double-interface smart card generally adopts single face FPC (flexible PCB) coil antenna, for example is applied to the plug-in type double-interface smart card of mobile phone.But the antenna size of single face FPC coil antenna is bigger, and communication distance is nearer.And along with the continuous expansion of the application of contactless and double-interface smart card, it is more and more stronger that the miniaturization of antenna requires, and present single face FPC coil antenna can not meet the demands.In general, reduced the size of antenna, communication distance also can reduce.Therefore, under the prerequisite that guarantees communication distance, reducing antenna size is the problem that needs solve.
The utility model content
Main purpose of the present utility model is, a kind of contactless antenna is provided, and has increased communication distance, has reduced the size of antenna.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of contactless antenna comprises inductance coil, and described inductance coil is the coil of two superimposed at least, is provided with insulating medium layer between the described coil of every adjacent layer, and the described coil of every adjacent layer passes the insulating medium layer feed and connects.
After adopting technique scheme, the utility model contactless antenna is owing to adopted the mode of lattice coil stack to increase the effective area in coil encirclement magnetic field, and then obtain bigger induced electromotive force, thereby reached the purpose that increases communication distance, reduces antenna size.
Another main purpose of the present utility model is, a kind of contactless antenna group is provided, and has increased communication distance, has reduced the size of antenna.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of contactless antenna group, comprise at least two antennas, described antenna comprises inductance coil, the described inductance coil of at least one antenna in described at least two antennas is for being the coil of two superimposed at least, be provided with insulating medium layer between the described coil of every adjacent layer, the described coil of every adjacent layer passes the insulating medium layer feed and connects.
After adopting technique scheme, the utility model contactless antenna group is owing to comprise the coil of multilayer stack, increase coil and surrounded the effective area in magnetic field, and then obtained bigger induced electromotive force, thereby reached the purpose that increases communication distance, reduces antenna size.
Another main purpose of the present utility model is, a kind of contact type intelligent card is provided, and has increased communication distance, has reduced the size of antenna.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of contact type intelligent card, comprise the smart card body, described smart card body is connected with antenna assembly, described antenna assembly comprises inductance coil, the described inductance coil of in the described antenna assembly at least one is the coil of two superimposed at least, be provided with insulating medium layer between the described coil of every adjacent layer, the described coil of every adjacent layer passes the insulating medium layer feed and connects.
After adopting technique scheme, the antenna of the utility model smart card is owing to comprise the coil of multilayer stack, increase coil and surrounded the effective area in magnetic field, and then obtained bigger induced electromotive force, thereby reached the purpose that improves communication distance, reduces antenna size.
Description of drawings
Fig. 1 is the utility model contactless antenna embodiment cross-sectional schematic;
Fig. 2 is the cross-sectional schematic of the utility model embodiment one;
Fig. 3 is the another schematic diagram of the utility model embodiment one;
Fig. 4 is the cross-sectional schematic of the terminal reception antenna of the utility model embodiment two;
Fig. 5 accepts the another schematic diagram of antenna for terminal shown in Figure 4;
Fig. 6 is the outside reception antenna schematic diagram of the utility model embodiment two;
Fig. 7 is the application schematic diagram of the utility model embodiment two.
Embodiment
Below in conjunction with accompanying drawing execution mode of the present utility model is described in further details.
In order to increase communication distance, to reduce antenna size, the utility model embodiment provides a kind of contactless antenna, antenna sets and smart card.
Based on the radio-frequency recognition system communication of inductance coupling high and the coupling intermediary of power transfer is space magnetic field, and coupled magnetic field constitutes the closed-loop path between aerial coil, coil to total magnetic flux contribution as shown in the formula:
In the formula, B is a magnetic density, and A is the area that coil surrounded, and N is a coil turn.
General type by induction law:
In the formula, u is an induced electromotive force, and t is the time.
By last two formulas as can be seen, constant and do not increase under the situation of antenna number of turn N at magnetic density B, in order to obtain high induced electromotive force, can increase the effective area A that coil surrounds.Based on this, the basic thought of the technical scheme of a kind of contactless antenna, antenna sets and smart card that the utility model provides is, by increasing the effective area A of aerial coil, make induced flux ψ increase, obtain bigger induced electromotive force u, thereby reach the purpose that reduces antenna size, increases communication distance.
A kind of contactless antenna that the utility model embodiment provides, comprise inductance coil 1, as shown in Figure 1, described inductance coil 1 is the coil of two superimposed at least, be provided with insulating medium layer 3 between the coil 1 of every adjacent layer, the coil 1 of every adjacent layer passes the insulating medium layer feed and connects.
During application, inductance coil 1 places magnetic field, under the situation that magnetic flux density B equates, because inductance coil 1 is the mode of multilayer stack, increased the effective area A in coil encirclement magnetic field, made induced flux ψ increase, thereby obtain bigger induced electromotive force u, for terminal equipment provides power supply and information interaction, make that the reading/writing distance (being communication distance) of antenna increases, corresponding antenna size reduces.
Wherein, the coil 1 of every adjacent layer passes the concrete implementation of insulating medium layer feed connection and can be: the coil 1 that modes such as insulating medium layer 3 coilings or etching form lower floor is passed in a tap that is positioned at the coil 1 on upper strata, realizes that feed connects; Also can by via hole respectively two taps of the coil 1 of the levels that forms of coiling or etching couple together and realize that feed connects.Coil 1 a remaining tap of the superiors and the 1 remaining tap of undermost coil are drawn the contact with using terminal to link to each other as the pin of inductance coil 1.These two taps can be positioned at the superiors and the orlop of antenna, but can connect by via hole according to using needs, make two taps be positioned at same one deck of antenna.
Wherein, every layer coil 1 coiling mode is continuous coiling, and current trend is consistent, and the current direction of promptly every layer line circle 1 is clockwise or is counterclockwise; The coil 1 relative cloth line position of adjacent layer can be vertical corresponding consistent wiring the up and down, also can be the wiring of staggering up and down; The coiling number of turn of the coil 1 of each layer can also can be difference for identical, decides on concrete operating position; The shape of every layer line circle 1 can be rectangle, circle or other shapes, and the shape of every layer line circle can be consistent, also can be inconsistent, decide on concrete operating position.
Wherein, the contactless antenna that the utility model embodiment provides can be PCB (printed circuit board (PCB)) coil antenna, also can be the FCP coil antenna; The contactless antenna that the utility model embodiment provides can directly link to each other with using terminal, also can be by linking to each other with using terminal after secondary or the multistage coupling again.
Wherein, insulating medium layer 3 can be made by different manufacture crafts and material.
Further, the contactless antenna that the utility model embodiment provides also comprises electric capacity 2, and electric capacity 2 is in parallel with inductance coil.Tuning by electric capacity 2 can make the utility model contactless antenna reach best resonance frequency, obtains best quality factor, makes coupling efficiency reach maximum.
Preferably, electric capacity 2 is printed the size that parallel plate capacitor can not increase antenna for printing parallel plate capacitor.
Further, the contactless antenna that the utility model embodiment provides has the face of sticking usually, in application process, according to actual conditions and connection request, is attached on other equipment by the face of sticking, and the described face of sticking is provided with the absorbing material layer.When the utility model contactless antenna sticked on electromagnetism on the noisy object, the absorbing material layer had reduced the electromagnetic interference of outer bound pair antenna, had improved the communication distance and the communication quality of antenna.
It is pointed out that the thick and levels inductance coil parameters such as distance apart of live width, line-spacing, the line of coil 1 can regulate according to actual operating position, to satisfy instructions for use.Modes such as geometric parameter that can be by revising the utility model antenna and capacitance are regulated the inductance value of aerial coil and the capacitance coupling with the best of needing obtaining.
In order to make those skilled in the art better understand the technical solution of the utility model, also be described in detail in conjunction with the accompanying drawings below by specific embodiment.
Embodiment one
Referring to Fig. 2 and Fig. 3, the contactless antenna that present embodiment provides is the FCP coil antenna, comprises inductance coil, inductance coil is the 3 stacked coils that add 1, comprise upper coil 17, intermediate layer coil 18 and inner coil 19, and comprise insulating medium layer 3 between every layer line circle 1, be i.e. the FCP layer; A tap of coil 17 is passed insulating medium layer 3 and is connected with coil 18 feeds, and a tap of coil 18 is passed insulating medium layer 3 and is connected with coil 19 feeds.Three layer line circles can effectively increase effective area A, make under the equal situation, obtain bigger induced electromotive force u, have increased communication distance.
Wherein, as shown in Figure 3,, draw contact 15, as contactless antenna and the chip circuit of radio-frequency recognition system or the connecting terminal of terminal of present embodiment as the tap of sky wire pin from being positioned at upper coil 17 and inner coil 19.The contactless antenna of present embodiment links to each other with chip circuit or terminal by connecting terminal 15 through connection handle 16, for chip circuit or terminal provide energy or signal.
In addition, three layers coil 1 is rectangle, vertical corresponding wiring, number of turn unanimity, and rich continuously system, inductive current direction unanimity.
And present embodiment also comprises the printing parallel plate capacitor 2 that is made of top plate 21 and lower plywood 22 in parallel with inductance coil.Wherein, the tap of top plate 21 upper layer coils 17 is electrically connected, and lower plywood 22 is electrically connected with the tap of inner coil 19.Tuning by parallel plate capacitor 2 makes the resonance frequency of antenna reach required frequency, is operated in optimum state to guarantee antenna.
Correspondingly, the utility model embodiment also provides a kind of contactless antenna group, comprise at least two antennas, described antenna comprises inductance coil 1, the described inductance coil 1 of at least one antenna in described at least two antennas is the coil of two superimposed at least, be provided with insulating medium layer 3 between the coil 1 of every adjacent layer, the coil 1 of every adjacent layer passes insulating medium layer 3 feeds and connects.
The utility model contactless antenna group has increased aerial coil and has surrounded the effective area in magnetic field, and then obtained bigger induced electromotive force, thereby reached the purpose that increases communication distance, reduces antenna size owing to comprise the coil of multilayer stack.
Wherein, the contactless antenna that at least one antenna in described at least two antennas can adopt above-mentioned the utility model embodiment to provide, the front has been described in detail, and repeats no more here.
Further, the direct feed that is connected between two antennas that are connected in described at least two antennas connects or is of coupled connections.
Further, the described inductance coil of at least one antenna in described at least two antennas is parallel with electric capacity, and tuning by electric capacity can make the utility model contactless antenna group reach best resonance frequency, obtain best quality factor, make coupling efficiency reach maximum.
Preferably, described electric capacity is printed the size that parallel plate capacitor can not increase antenna for printing parallel plate capacitor.
Further, at least one antenna in described at least two antennas has the face of sticking usually, in application process, according to actual conditions and connection request, is attached on other equipment by the face of sticking, and the described face of sticking is provided with the absorbing material layer.When antenna sticked on electromagnetism on the noisy object, the absorbing material layer had reduced the electromagnetic interference of outer bound pair antenna, had improved the communication distance and the communication quality of antenna.
Also in conjunction with the accompanying drawings the utility model antenna sets is described in detail below by specific embodiment.
Embodiment two
Referring to Fig. 4 to Fig. 7, the present embodiment antenna sets is two grade coupled antenna sets, comprises antenna 11, antenna 12,13 3 antennas of antenna, and three antennas are the contactless antenna that the utility model embodiment provides, be the FCP coil antenna, adopt the inductance coil of double-deck stack.Because adopted the coil of multilayer stack in the antenna sets of present embodiment, the effective area A that makes coil surround magnetic field increases to some extent, under equal conditions, make the induced electromotive force that produces increase, and then improved the reading/writing distance of antenna sets.
Fig. 4 and Fig. 5 are the schematic diagram of antenna 11, as shown in the figure, the inductance coil of antenna 11 is the coil of double-deck stack, comprise upper strata inductance coil 113 and lower floor's inductance coil 114, coil 113 is positioned at the upper strata of FCP plate, coil 114 is positioned at the lower floor of FCP plate, is the FCP layer between coil 113 and the coil 114, and a tap of coil 113 is passed the FCP layer and is connected with coil 114 feeds.Wherein, every layer coil 1 is a rectangle, adopts levels dislocation wiring.
Fig. 6 is the schematic diagram of antenna 12 and antenna 13, and as shown in the figure, the inductance coil of antenna 12 and antenna 13 is the coil of double-deck stack, is the FCP layer between every layer line circle 1, and wherein every layer coil 1 is a rectangle, adopts levels dislocation wiring.The structure of antenna 12 and antenna 13 and antenna 11 are basic identical, can be referring to Fig. 4 and structure shown in Figure 5.Wherein the inductance coil of antenna 12 comprises upper coil 121 and inductance coil 122, is the FCP layer between coil 121 and the coil 122, and coil 121 passes the FCP layer and is connected with coil 122 feeds.Antenna 13 comprises upper coil 131 and inner coil 132, is the FCP layer between coil 131 and the coil 132, and coil 131 passes the FCP layer and is connected with coil 132 feeds.Antenna 12 is connected by connection handle 14 direct feeds with antenna 13.In addition, antenna 13 is also in parallel is used for the tuning printing parallel plate capacitor 2 that is made of top plate 21 and lower plywood 22 in parallel with inductance coil.
Fig. 7 is the application schematic diagram of present embodiment, and in the present embodiment, the applied environment of present embodiment antenna sets is a mobile phone terminal equipment 4.Referring to Fig. 7, wherein, 13 direct feeds are connected antenna 12 with antenna, as outside reception antenna.Antenna 11 is accepted antenna as terminal, is of coupled connections with antenna 12.
During application, the reception antenna 13 of outside reception antenna places the external magnetic field, produces induced electromotive force u1 by the magnetic field that changes on inductance coil.Antenna 13 by the direct feed mode, directly powers to the transmitting antenna 12 of outside reception antenna the induced electromotive force u1 that obtains.Because the induced electromotive force that antenna 13 produces, make the magnetic field that the inductance coil of antenna 12 changes.
Here be noted that as shown in Figure 7 the practical environment of the antenna sets of present embodiment is a mobile phone terminal equipment 4, battery 5 and terminal equipment body 43 all produce interference to the magnetic field of antenna.For the contactless antenna group that makes present embodiment can better be worked,, sticked absorbing material at the attaching face of terminal reception antenna 11 with terminal equipment body 43; Externally the reception antenna 13 of reception antenna and the attaching face of battery 5 have sticked absorbing material; Externally the transmitting antenna 12 of reception antenna and the attaching face of battery 5 have sticked absorbing material, have well avoided the magnetic interference of battery 5 and 43 pairs of antenna sets of terminal equipment body.
In addition, the utility model embodiment also provides a kind of contact type intelligent card, comprise the smart card body, described smart card body is connected with antenna assembly, described antenna assembly comprises inductance coil, and wherein, the described inductance coil of at least one in the described antenna assembly is the coil of two superimposed at least, be provided with insulating medium layer 3 between the coil 1 of every adjacent layer, the coil 1 of every adjacent layer passes insulating medium layer 3 feeds and connects.
The antenna of the utility model smart card has increased coil and has surrounded the effective area in magnetic field, and then obtained bigger induced electromotive force, thereby reached the purpose that improves communication distance, reduces antenna size owing to comprise the coil of multilayer stack.
Wherein, described antenna assembly can be individual antenna or antenna sets.
Contactless antenna and antenna sets that the antenna of the utility model smart card can adopt the utility model embodiment to provide, the front has been described in detail, and repeats no more here.Be understandable that the utility model contact type intelligent card is meant the smart card with contactless interface.
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.
Claims (11)
1. a contactless antenna comprises inductance coil, it is characterized in that:
Described inductance coil is the coil of two superimposed at least, is provided with insulating medium layer between the described coil of every adjacent layer, and the described coil of every adjacent layer passes the insulating medium layer feed and connects.
2. contactless antenna according to claim 1 is characterized in that:
Also comprise electric capacity, described electric capacity is in parallel with described inductance coil.
3. contactless antenna according to claim 2 is characterized in that:
Described electric capacity is for printing parallel plate capacitor.
4. contactless antenna according to claim 1 is characterized in that: described contactless antenna has the face of sticking, and the described face of sticking is provided with the absorbing material layer.
5. a contactless antenna group comprises at least two antennas, and described antenna comprises inductance coil, it is characterized in that:
The described inductance coil of at least one antenna in described at least two antennas is the coil of two superimposed at least, is provided with insulating medium layer between the described coil of every adjacent layer, and the described coil of every adjacent layer passes the insulating medium layer feed and connects.
6. contactless antenna group according to claim 5 is characterized in that:
The direct feed that is connected between two antennas that are connected in described at least two antennas connects or is of coupled connections.
7. contactless antenna group according to claim 5 is characterized in that:
The described inductance coil of at least one antenna in described at least two antennas is parallel with electric capacity.
8. contactless antenna group according to claim 7 is characterized in that:
Described electric capacity is for printing parallel plate capacitor.
9. contactless antenna group according to claim 5 is characterized in that:
At least one antenna in described at least two antennas has the face of sticking, and the described face of sticking is provided with the absorbing material layer.
10. a contact type intelligent card comprises the smart card body, and described smart card body is connected with antenna assembly, and described antenna assembly comprises inductance coil, it is characterized in that:
The described inductance coil of in the described antenna assembly at least one is the coil of two superimposed at least, is provided with insulating medium layer between the described coil of every adjacent layer, and the described coil of every adjacent layer passes the insulating medium layer feed and connects.
11. contact type intelligent card according to claim 10 is characterized in that: described antenna assembly is individual antenna or antenna sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920278141 CN201590479U (en) | 2009-12-15 | 2009-12-15 | Non-contact antenna, antenna array and smart card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920278141 CN201590479U (en) | 2009-12-15 | 2009-12-15 | Non-contact antenna, antenna array and smart card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201590479U true CN201590479U (en) | 2010-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920278141 Expired - Lifetime CN201590479U (en) | 2009-12-15 | 2009-12-15 | Non-contact antenna, antenna array and smart card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201590479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111723895A (en) * | 2019-03-22 | 2020-09-29 | 欧姆龙株式会社 | Radio frequency tag |
-
2009
- 2009-12-15 CN CN 200920278141 patent/CN201590479U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111723895A (en) * | 2019-03-22 | 2020-09-29 | 欧姆龙株式会社 | Radio frequency tag |
| CN111723895B (en) * | 2019-03-22 | 2024-04-02 | 欧姆龙株式会社 | Radio frequency tag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100015 Beijing city Chaoyang District Dongzhimen West eight Street No. 2 room Wanhong Yan Dong Business Garden Patentee after: Beijing Watchdata Limited by Share Ltd Address before: 100015 Beijing city Chaoyang District Dongzhimen West eight Street No. 2 room Wanhong Yan Dong Business Garden Patentee before: Beijing Woqi Data System Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100922 |