CN205389009U - SMD NFC antenna of zigzag and antenna system - Google Patents
SMD NFC antenna of zigzag and antenna system Download PDFInfo
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- CN205389009U CN205389009U CN201620110671.8U CN201620110671U CN205389009U CN 205389009 U CN205389009 U CN 205389009U CN 201620110671 U CN201620110671 U CN 201620110671U CN 205389009 U CN205389009 U CN 205389009U
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Abstract
The utility model discloses a SMD NFC antenna of zigzag and antenna system, the SMD NFC antenna of zigzag includes the ferrite core body and NFC antenna coil, and NFC antenna coil is the zigzag to be encircleed on the surface of the ferrite core body, ferrite core personally experiences sth. Part of the body and is the rectangle strip body along the extension of X axle orientation, includes to be on a parallel with the left surface and the right flank of Z axle orientation, and is on a parallel with the upward side and the downside of Y axle orientation, NFC antenna coil includes left side portion, right side portion, goes up lateral part and lower lateral part, NFC antenna coil's last lateral part, downside part do not with the X axle is perpendicular, NFC antenna coil's left side portion, right side part do not with the X axle is certain slope contained angle theta. The utility model discloses the SMD NFC antenna of zigzag itself has different magnetic field distribution, and ferrite core body upper surface (the position of the coil that does not detour) will form the magnetic field component of perpendicular to upper surface, and this magnetic field component will carry out the stack of syntropy with the magnetic field that the vortex on the metal sheet produced, and then reinforcing antenna system's performance, reach high -performance effect.
Description
Technical field
This utility model relates to SMD NFC antenna, particularly relates to the SMD NFC antenna of zigzag and includes the antenna system of the SMD NFC antenna of this zigzag.
Background technology
Operating frequency is at the near-field communication (NearFieldCommunication of 13.56MHz, NFC) being a kind of wireless communication technique utilizing magnetic field induction transceiving electromagnetic ripple to realize carrying out between electronic equipment short-range communication, it is a kind of contactless identification and interconnection technique that this technology is alternatively called.This technology can provide the information of simple, intuitive to exchange for consumer, access to content and service.Due to this particularity of NFC technique, recent NFC obtains and increasingly payes attention to widely, and this technology is applied in the equipment such as mobile equipment, PC and smart control.
In the application of traditional NFC handheld device, it is typically chosen and NFC antenna radiant body is placed on above battery, simultaneously in order to reduce the negative effect to NFC antenna of battery (or other metal materials) the upper eddy current contrary with the sense of current of antenna own produced, it is necessary to place one layer of ferrite aerial coil and battery can kept apart in the middle of NFC antenna coil and battery.Although ferrite can reduce the intensity of negative eddy current on battery or metallic plate, but can not changing the flow direction of this eddy current, this eddy current can not be become twin aerial itself in other words have effective eddy current of potentiation.Therefore, in order to ensure the performance of NFC antenna, the NFC antenna of use must is fulfilled for certain dimensional requirement.Owing to the antenna size of this tradition NFC antenna scheme is relatively big, so the demand of handheld device miniaturization can not be met.
In order to reach to reduce the purpose of NFC antenna size, Murata Manufacturing Co. Ltd. of Amada Co., Ltd. (Murata) proposes a kind of small-sized SMD NFC antenna solution in the recent period in the open CN103620869A of Chinese invention patent, and illustrates the program concrete application in practical communication equipment in Chinese invention patent CN102959800B.Compared with tradition NFC antenna scheme, the maximum of the program is a difference in that traditional larger-size NFC antenna coil (such as typical coil dimension is 30mmx40mm) around the home around small-sized ferrite core body (size of ferrite core body may diminish to identical with the size of general chip), by effectively being coupled with between metallic plate (or pcb board) by the aerial coil on undersized ferrite lower surface around the home, and then strengthen the performance of whole antenna system (namely including SMD NFC antenna and metallic plate).The largest benefit of this scheme is to inspire the eddy current that antenna monomer itself has positive effect on a metal plate.In addition, although compared with traditional large scale NFC antenna scheme, the SMD NFC antenna scheme that field, village proposes has had huge improvement in antenna size, but this paster antenna is just like next shortcoming: when being placed on when this antenna on PCB or metallic plate, due to aerial coil on the ferrite special in line mode so that antenna itself produces the magnetic field of effective eddy current generation that the Main way in magnetic field excites on a metal plate with it and is mutually perpendicular to orthogonal.This on magnetic direction be mutually perpendicular to orthogonal make whole antenna system can not reach the best state.Therefore, it is necessary to SMD NFC antenna recited above is improved, develop and a kind of not only there is small size but also have simultaneously and can reach the best SMD NFC antenna of high-performance mated with the magnetic field that the eddy current that excites on a metal plate produces.
Additionally, disclose a kind of inclined antenna winding mode based on multi-layered magnetic insulant in Chinese patent CN204809410U in the recent period.Aerial coil is divided into the first, the second, the third and fourth four part, and wherein Part I is in the superiors of multilayer material, and Part II is in the lowermost layer of multilayer material, and the third and fourth part is respectively used on limit, left and right, the first and second parts are attached.Especially, the third and fourth part must be distributed across on multi-layered magnetic material on different layers, and connects with through hole between different layers, to be finally reached the purpose being attached partially to first and second together.Obviously, this antenna processing mode based on multilayer material or technique are complex and loaded down with trivial details, are not appropriate for the NFC antenna with monolayer ferrite core being previously mentioned in this case.
In sum, small size cannot be combined by SMD NFC antenna with high-performance, and result of use is not good.
Utility model content
The purpose of this utility model is in that to provide the SMD NFC antenna of zigzag, it is intended to the problem solving cannot small size be combined with high-performance due to existing NFC antenna in prior art.
This utility model is achieved in that
The SMD NFC antenna of zigzag, including ferrite core body and NFC antenna coil, described NFC antenna coil is that zigzag is on the outer surface of described ferrite core body, described ferrite core body is along X-axis (length, L) the rectangular strip body that direction extends, including along the left surface in Y-axis (width, W) direction and right flank, and along the upper side in Z axis (highly, H) direction and downside；Described NFC antenna coil includes laying respectively at the left side of described left surface, right flank, upper side and downside, right side, upper lateral part and following side；The upper lateral part of described NFC antenna coil, following side are vertical with described X-axis respectively；The left side of described NFC antenna coil, right side are certain slanted angle θ respectively with described X-axis, are zigzag to constitute the projection in the Y-axis direction of described NFC antenna coil.
Further, the left side of described NFC antenna coil, right side are the slanted angle of arctan (H/L)≤θ≤arctan (H/ (L/2)) respectively with described X-axis, and wherein H and L is height and the length of ferrite core body.
Further, the lower end of described ferrite core body is connected to antenna dielectric layer, and the downside of described antenna dielectric layer is connected to outer electrode, and described outer electrode is connected with described NFC antenna coil.
Further, described antenna dielectric layer is provided with two pore electrodes excessively for connecting described NFC antenna coil and described outer electrode, described pore electrode of crossing is connected with described NFC antenna coil, and two described pore electrode correspondences respectively of crossing are arranged on described first outer electrode and described second outer electrode.
Further, the pore electrode of crossing being positioned on described first outer electrode is located at the right-hand member of described first outer electrode, and the pore electrode of crossing being positioned on described second outer electrode is located at the left end of described second outer electrode.
Further, the left side of described NFC antenna coil, left side, upper lateral part all include several parallel wire bodies with following side, the wire body of described left surface, right flank, upper side and downside is sequentially connected with, and the rotor shaft direction of formation NFC antenna coil and the X-direction along ferrite core body have the winding of angle (90+ θ).
Further, the described left surface of described ferrite core body, right flank, upper side are provided with several the parallel wire casings for housing described wire body with downside, the wire casing of each side is sequentially connected with, form the spiral wire cell body that rotor shaft direction has the axle of (90+ θ) angle to be wound around with the X-direction along ferrite core body, with accommodating NFC antenna coil.
This utility model additionally provides antenna system, and including the SMD NFC antenna of aforesaid zigzag, substrate and metallic plate, described metallic plate is placed on the substrate, and the SMD NFC antenna of described zigzag is positioned on described metallic plate.
Further, described antenna wire system includes multiple SMD NFC antenna of the zigzag being serially connected, and multiple SMD NFC antenna of described zigzag being serially connected are individually positioned on described metallic plate.
Further, alongst, the inner of the SMD NFC antenna of described zigzag is located at the surface of described metallic plate, and the outer end of the SMD NFC antenna of described zigzag is located at the outside of described metallic plate.
Further, described metallic plate is rectangle, and described antenna system includes four SMD NFC antenna of the zigzag being serially connected, and the SMD NFC antenna of described zigzag that four are serially connected is individually positioned in four sides on described metallic plate.
Compared with prior art, the SMD NFC antenna of zigzag that this utility model provides, described ferrite core body is the rectangular strip body extended along X-direction；NFC antenna coil includes laying respectively at the left side of described left surface, right flank, upper side and downside, left side, upper lateral part and following side；The upper lateral part of NFC antenna coil, following side are vertical with described X-axis respectively；The left side of NFC antenna coil, right side respectively with the slanted angle of described X-axis θ at an angle, constitute the projection in the Y-axis direction of NFC antenna coil be zigzag.So that the SMD NFC antenna of zigzag itself has Distribution of Magnetic Field unlike the prior art, the do not detour position of coil of special ferrite core body upper surface will be formed and be perpendicular to the magnetic-field component of upper surface, this magnetic-field component, by strengthening the performance of antenna system, reaches high performance effect；It addition, NFC antenna coil encircling is at the outer surface of ferrite core body, make full use of the space of ferrite core body so that the SMD NFC antenna of whole zigzag is smaller.
Accompanying drawing explanation
Fig. 1 is the perspective view of the SMD NFC antenna of zigzag that this utility model embodiment provides；
Fig. 2 is the detonation configuration schematic diagram of the SMD NFC antenna of zigzag that this utility model embodiment provides；
Fig. 3 is field, village of the prior art NFC paster antenna monomer fundamental diagram；Wherein A is magnetic direction；
Fig. 4 is the fundamental diagram of the SMD NFC antenna of zigzag that this utility model embodiment provides；Wherein A and B is two component directions in magnetic field；
Fig. 5 is field, village of the prior art NFC patch antenna system fundamental diagram；
Fig. 6 is the antenna system fundamental diagram of the SMD NFC antenna of zigzag that this utility model embodiment provides；
Fig. 7 is field, village of the prior art NFC patch antenna system schematic diagram；
Fig. 8 village of the prior art field NFC patch antenna system two-dimensional magnetic field scattergram on Y=0 cross section；
Fig. 9 be this utility model embodiment provide there is a SMD NFC antenna system schematic of zigzag；
Figure 10 is the zigzag NFC patch antenna system of this utility model embodiment offer two-dimensional magnetic field scattergram on Y=0 cross section；
Figure 11 is the schematic diagram of the antenna system with four SMD NFC antenna of zigzag that this utility model embodiment provides；
Figure 12 is the magnetic field Hz component profile with this case single Z-type NFC antenna system Z=25mm place of side on a metal plate that this utility model embodiment provides；
Figure 13 is the magnetic field Hz component profile with four this case Z-type NFC antenna systems Z=25mm place of side on a metal plate that this utility model embodiment provides.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model.
Below in conjunction with specific embodiment, realization of the present utility model is described in detail.
The corresponding same or analogous parts of same or analogous label in the accompanying drawing of the present embodiment；In description of the present utility model, it will be appreciated that, if have term " on ", D score, " left side ", orientation or the position relationship of the instruction such as " right side " are based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore term the being merely cited for property explanation of position relationship described in accompanying drawing, it is not intended that the restriction to this patent, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
With reference to Fig. 1～13, understand specific embodiment of the utility model.
The SMD NFC antenna of zigzag that the present embodiment provides, it is possible to be used in antenna system, it is achieved provide the undersized SMD NFC antenna of high-performance for mobile device client.
The SMD NFC antenna of zigzag, including ferrite core body 11 and NFC antenna coil 10, wherein, NFC antenna coil 10 surrounds on the outer surface of ferrite core body 11 in zigzag, ferrite core body 11 is the rectangular strip body extended along X-direction, including the left surface 113 and the right flank 111 that are perpendicular to Y direction, and it is perpendicular to upper side 112 and the downside 114 of Z-direction；NFC antenna coil 10 includes laying respectively at the left side 10c of described left surface, right flank, upper side and downside, right side 10a, upper lateral part 10b and following side 10d；The upper lateral part 10b of described NFC antenna coil, following side 10d are vertical with Z axis respectively；The left side 10c of NFC antenna coil, right side 10a are certain slanted angle θ respectively with X-axis, are zigzag to constitute the projection in the Y-axis direction of described NFC antenna coil.
To be the NFC antenna coil 10 detoured at the upper surface of the antenna area that can only occupy at most whole upper surface (or lower surface) half for projecting another statement misaligned；The NFC antenna coil 10 that ferrite core body 11 upper surface does not detour in the-x direction in other words.As described below, ferrite core body 11 upper surface being formed of NFC antenna coil 10 that do not detour is perpendicular to the magnetic-field component of this upper surface, and this magnetic-field component will strengthen the performance of antenna system.Meanwhile, this special aerial coil projection in the Y direction is made to be zigzag around line mode.
The formation magnetic field, magnetic field that eddy current loop that the magnetic-field component that zigzag NFC paster antenna is vertical with long axis direction can be coupled out on metallic plate 60 with aerial coil just effectively produces being overlapped mutually in the same direction, thus strengthening the performance of integrated antenna system.
The SMD NFC antenna of above-mentioned zigzag, by the upper side 112 at ferrite core body 11, downside 114, around NFC antenna coil 10 on left surface 113 and right flank 111, and the NFC antenna coil 10 that is positioned at upper side 112 and downside 114 is respectively corresponding parallel with upper side 112 and downside, NFC antenna coil 10 correspondence respectively being positioned at left surface 113 and right flank 111 tilts at an angle with left surface 113 and right flank 111, so that the SMD NFC antenna of zigzag itself has different Distribution of Magnetic Field, ferrite core body 11 upper surface being formed of coil that do not detour is perpendicular to the magnetic-field component of upper surface, this magnetic-field component will strengthen the performance of antenna system, reach high performance effect；It addition, NFC antenna coil 10 is looped around the outer surface of ferrite core body 11, make full use of the space of ferrite core body 11 so that the SMD NFC antenna of whole zigzag is smaller.
The lower end of above-mentioned ferrite core body 11 is connected to antenna dielectric layer 20, and the downside of antenna dielectric layer 20 is connected to outer electrode, and outer electrode is connected with NFC antenna coil 10.Outer electrode has two effects, and an effect is that another one effect is for welding between NFC antenna coil 10 and PCB at wiring board (PCB) upper two distributing points connecting NFC antenna coil 10 excitaton source.
Concrete, above-mentioned outer electrode includes the first outer electrode 401 and the second outer electrode 402, wherein, first outer electrode 401 and the second outer electrode 402 interval are arranged on the downside of antenna dielectric layer 20, first outer electrode 401 is positioned at the outer end of the downside of antenna dielectric layer 20, and the second outer electrode 402 is positioned at the middle part of the downside of antenna dielectric layer 20.
Concrete, for the ease of the connection of outer electrode Yu NFC antenna coil 10, antenna dielectric layer 20 is provided with two for the pore electrode 30 excessively connecting NFC antenna coil 10 and outer electrode, crosses pore electrode 30 and is connected with NFC antenna coil 10.
Cross pore electrode 31 and 32 correspondence respectively for two and be arranged on the first outer electrode 401 and the second outer electrode 402, wherein, the pore electrode 31 of crossing being located on the first outer electrode 401 is located at the right-hand member of the first outer electrode 401, the pore electrode 32 of crossing being located on the second outer electrode 402 is located at the left end of the second outer electrode 402, such that pore electrode 31 and 32 can be crossed by two to connect outer electrode and NFC antenna coil 10 respectively.
NFC antenna coil 10 includes NFC antenna, lower NFC antenna, left NFC antenna and right NFC antenna, upper NFC antenna, lower NFC antenna, left NFC antenna and right NFC antenna are connected respectively on the upper side 112 of ferrite core body 11, downside, left surface 113 and right flank 111, and the pore electrode 31 of crossing being positioned on the first outer electrode 401 is connected with one end of left NFC antenna coil；The pore electrode 32 of crossing being positioned on the second outer electrode 402 is connected with the other end of NFC antenna coil.
In the present embodiment, ferrite core body 11 is made by having the low-loss magnetic material that pcrmeability is μ > 100.The ferrite core body 11 of this material can reduce the loss of magnetic, farthest improves the intensity in the magnetic field being looped around between the NFC antenna coil 10 on this ferrite core body 11 and this ferrite core body 11 to produce.
Field homogeneity in order to ensure NFC antenna coil is distributed, the left side of NFC antenna coil, left side, upper lateral part and following side all include the wire body that several are parallel, the wire body of left surface, right flank, upper side and downside is sequentially connected with, and formation NFC antenna coil becomes (90+ θ) to spend the winding at angle along the X-direction of ferrite core body.
Fixing for the ease of wire body, several the parallel wire casings for housing described wire body it are provided with in the left surface of ferrite core body, right flank, upper side and downside, the wire casing of each side is sequentially connected with, form the spiral wire cell body becoming (90+ θ) angle wound along the X-direction of ferrite core body, by the wire body (namely such line trough body structure can be entwined in the way of convenient antenna coil employing wire) of accommodating NFC antenna coil.
The processing method of this utility model NFC antenna coil is: is coated with some parallel metal pulp material strips in the left surface of ferrite core body, right flank, upper side and downside with screen printing mode, forms through high temperature sintering.Wherein, the end face of left surface, right flank, upper side and downside is sequentially connected, and forms spiral helicine aerial coil.
In other embodiments, the above-mentioned method with screen printing mode coating metal pulp material strip can combine with the structure of spiral wire cell body, so that during screen printing mode coating metal pulp material strip, not easily flash, the spacing between parallel wire body can be allowed less, and then make NFC antenna coil overall dimensions less.
In other embodiments, during for screen printing mode, metal pulp material strip adjacent between left surface, right flank, upper side and downside can form good electric connection, can the metal pulp material strip adjacent between left surface, right flank, upper side and downside to cut with wide be the triangular groove of 0.5-1mm for the 0.2-0.8mm length of side, so that during silk screen printing, there is the contact area of abundance the end of two adjacent metal pulp material strips, to ensure good electric connection.
The zigzag NFC antenna that the present embodiment provides and the maximum difference of the SMD NFC of proposition in the open CN103620869A of Chinese invention patent are NFC antenna coil 10 winding mode different on ferrite core body 11.This different coiling form will cause that antenna monomer itself has different Distribution of Magnetic Field.
With reference to Fig. 3 and Fig. 4, the magnetic field A of field, village NFC antenna monomer is distributed around direction of principal axis (namely X-direction) primarily along aerial coil, and the magnetic field of the NFC antenna coil 10 of the present embodiment also has along being perpendicular to around axial component B along except the component A that direction of principal axis is distributed except having.
It is used to describe the operation principle of the antenna system of the SMD NFC antenna in field, village with reference to Fig. 5, this figure.When this SMD NFC antenna is closely placed on the top of the substrate 50 (substrate) with metallic plate 60 (metalplate), if the sense of current of antenna monomer is a, so announce in CN105024169A setting forth such as Chinese invention patent, owing to near-field coupling principle coil on ferrite lower surface 114 will will produce around the eddy current loop b that +Z direction detours on metallic plate 60.The electric current of NFC antenna coil 10 will produce along the magnetic-field component A around direction of principal axis (-X direction), eddy current loop b on metallic plate 60 will produce the magnetic-field component B along +Z direction, because when this SMD NFC antenna and the external world carry out information mutual time, reference NFC antenna for accepting or launch generally will be placed on above metallic plate 60 and be parallel to the position (such as Z=25mm place) of metallic plate 60, therefore this along the magnetic-field component B of +Z direction by increasing this antenna system through the magnetic flux of reference antenna, thus strengthening the performance of antenna.Therefore, for antenna itself, now metallic plate 60 plays the effect of antenna amplifier antennafire, and this is also this size of SMD NFC antenna own can be done little one of the main reasons.
The Fig. 6 antenna system for providing according to the zigzag embodiment of this case, including the above-mentioned SMD NFC antenna of zigzag, substrate 50 and metallic plate 60, the SMD NFC antenna of above-mentioned zigzag is positioned on metallic plate 60；The SMD NFC antenna of zigzag can be completely placed in the top of metallic plate 60.Antenna system couples with metallic plate 60, also will produce eddy current loop b on metallic plate 60, and this eddy current also will produce the magnetic-field component B along +Z direction1, zigzag NFC antenna coil 10 itself except producing except the magnetic-field component A of-X direction, also will produce vertical with magnetic-field component A but with magnetic-field component B1Magnetic-field component B in the same direction2.Obviously, magnetic-field component B in the same direction1With magnetic-field component B2Superposition will strengthen antenna system performance.
In the present embodiment, alongst (i.e. X-direction), the inner of the SMD NFC antenna of zigzag is located at directly over metallic plate 60, and it is outside that the outer end of the SMD NFC antenna of zigzag is located at metallic plate 60；Now under NFC antenna coil 10 coiling on ferrite downside 114, the projection of NFC antenna will entirely fall within metallic plate 60, thus reaching there be coupling of the best with metallic plate 60.Due to the near-field coupling of NFC antenna and metallic plate 60 under coil, if therefore the sense of current of antenna monomer itself is a, then also will produce eddy current loop b on metallic plate 60；This eddy current also will produce the magnetic-field component B along +Z direction1.But with field, village scheme the difference is that, owing to this case uses the winding mode of zigzag, so NFC antenna monomer itself is except producing along except the magnetic-field component A of-X direction, also will produce vertical with magnetic-field component A but with magnetic-field component B1Magnetic-field component B in the same direction2.Obviously, magnetic-field component B in the same direction1With magnetic-field component B2Superposition will strengthen antenna system performance.
For the difference of the magnetic field intensity that the scheme and this programme antenna system that prove field, village produce in +Z direction, we will to based on (single) field, village monomer NFC patch antenna system with compare based on this case (single) zigzag NFC patch antenna system.Fig. 7 is the schematic diagram based on field, village NFC antenna system, and Fig. 8 is this antenna system actual two-dimensional magnetic field scattergram on Y=0 cross section, and wherein magnetic-field component marks along the distribution dotted rectangle of +Z direction.Fig. 9 is the schematic diagram based on this case zigzag NFC antenna system, and Figure 10 is this antenna system actual two-dimensional magnetic field scattergram on Y=0 cross section, and magnetic field marks by dotted rectangle too along the distribution of +Z direction.In the calculation, the ferrite magnetic conductance of antenna is μ=150, and ferrite is sized to 6mmx3mmx0.5mm, metallic plate be sized to 30mmx30mm.By magnetic field in Fig. 8 and Figure 10 is compared it can be seen that the magnetic field intensity based on this case NFC antenna system is far longer than the magnetic field intensity based on field, village NFC antenna system along the distribution of +Z direction.Therefore, also will there is better antenna performance based on the antenna system of this case NFC.
In other embodiments, as shown in figure 11, antenna system can also be based upon the situation based on multiple SMD NFC antenna of the zigzag being serially connected, several SMD NFC antenna of zigzag being serially connected are individually positioned on metallic plate 60, by this connected mode being serially connected, can ensure that the direction in the eddy current loop produced on metallic plate 60 by the SMD NFC antenna of each zigzag is consistent, the increase along with the series connection SMD NFC antenna monomer number of zigzag is increased by the intensity in the eddy current loop therefore produced on metallic plate 60.The size of the eddy current loop b produced on metallic plate 60 due to the SMD NFC antenna of zigzag with produce at metallic plate 60 along +Z direction magnetic-field component B1Size be directly proportional, therefore the number of SMD for the zigzag being serially connected comprised along with antenna NFC antenna unit is strengthened by the performance of antenna system.
Figure 12 gives the magnetic field Hz component profile at the Z=25mm place of side on a metal plate of the antenna system (namely as shown in Figure 9) based on an antenna element；Figure 13 gives the magnetic field Hz component profile at the Z=25mm place of side on a metal plate of the antenna system (as shown in figure 11) based on four antenna elements being serially connected.Comparison with reference to Figure 12 and Figure 13, can be seen that the size of the Hz component of the antenna system based on four antenna elements is significantly greater than the size of the Hz component of the antenna system based on an antenna element, therefore we can say that the increase of the number along with consecutive antenna unit is strengthened by the performance of antenna system.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included within protection domain of the present utility model.
Claims (10)
- The SMD NFC antenna of 1.Z font, it is characterized in that, including ferrite core body and NFC antenna coil, described NFC antenna coil is that zigzag is on the outer surface of described ferrite core body, described ferrite core body is the rectangular strip body extended along X-direction, including the left surface and the right flank that are parallel to Z-direction, and it is parallel to upper side and the downside of Y direction；Described NFC antenna coil includes laying respectively at the left side of described left surface, right flank, upper side and downside, right side, upper lateral part and following side；The upper lateral part of described NFC antenna coil, following side are vertical with described X-axis respectively；The left side of described NFC antenna coil, right side are certain slanted angle θ respectively with described X-axis, are zigzag to constitute the projection in the Y-axis direction of described NFC antenna coil.
- 2. the SMD NFC antenna of zigzag as claimed in claim 1, it is characterized in that, the left side of described NFC antenna coil, right side are the slanted angle of arctan (H/L)≤θ≤arctan (H/ (L/2)) respectively with described X-axis, and wherein H and L is height and the length of ferrite core body.
- 3. the SMD NFC antenna of zigzag as claimed in claim 1 or 2, it is characterized in that, the lower end of described ferrite core body is connected to antenna dielectric layer, and the downside of described antenna dielectric layer is connected to outer electrode, and described outer electrode is connected with described NFC antenna coil.
- 4. the SMD NFC antenna of zigzag as claimed in claim 3, it is characterized in that, described antenna dielectric layer is provided with two pore electrodes excessively for connecting described NFC antenna coil and described outer electrode, and described outer electrode includes the first outer electrode and the second outer electrode；Described pore electrode of crossing is connected with described NFC antenna coil, and two described pore electrode correspondences respectively of crossing are arranged on described first outer electrode and described second outer electrode.
- 5. the SMD NFC antenna of zigzag as claimed in claim 1 or 2, it is characterized in that, the left side of described NFC antenna coil, left side, upper lateral part all include several parallel wire bodies with following side, the wire body of described left surface, right flank, upper side and downside is sequentially connected with, and forming rotor shaft direction has the axle of (90+ θ) angle to be wound around with the X-direction along ferrite core body.
- 6. the SMD NFC antenna of zigzag as claimed in claim 5, it is characterized in that, the described left surface of described ferrite core body, right flank, upper side are provided with several the parallel wire casings for housing described wire body with downside, the wire casing of each side is sequentially connected with, form the spiral wire cell body having the axle of (90+ θ) angle to be wound around along the X-direction of ferrite core body, with accommodating NFC antenna coil.
- 7. antenna system, it is characterised in that include the SMD NFC antenna of the zigzag described in any one of claim 1 to 6, substrate and metallic plate, described metallic plate is placed on the substrate, and the SMD NFC antenna of described zigzag is positioned on described metallic plate.
- 8. antenna system as claimed in claim 7, it is characterised in that described antenna system includes multiple SMD NFC antenna of the zigzag being serially connected, and multiple SMD NFC antenna of described zigzag being serially connected are individually positioned on described metallic plate.
- 9. antenna system as claimed in claim 7 or 8, it is characterised in that alongst, the inner of the SMD NFC antenna of described zigzag is located at the surface of described metallic plate, and the outer end of the SMD NFC antenna of described zigzag is located at the outside of described metallic plate.
- 10. the antenna system as described in claim 7 or 9, it is characterized in that, described metallic plate is rectangle, and described antenna system includes four SMD NFC antenna of the zigzag being serially connected, and the SMD NFC antenna of described zigzag that four are serially connected is individually positioned in four sides on described metallic plate.
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| CN201620110671.8U CN205389009U (en) | 2016-02-03 | 2016-02-03 | SMD NFC antenna of zigzag and antenna system |
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| CN201620110671.8U CN205389009U (en) | 2016-02-03 | 2016-02-03 | SMD NFC antenna of zigzag and antenna system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552562A (en) * | 2016-02-03 | 2016-05-04 | 深圳市信维通信股份有限公司 | Z-shaped patch NFC antenna and antenna system |
| TWI635655B (en) * | 2016-11-21 | 2018-09-11 | 佳邦科技股份有限公司 | Portable electronic device and antenna module thereof |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552562A (en) * | 2016-02-03 | 2016-05-04 | 深圳市信维通信股份有限公司 | Z-shaped patch NFC antenna and antenna system |
| TWI635655B (en) * | 2016-11-21 | 2018-09-11 | 佳邦科技股份有限公司 | Portable electronic device and antenna module thereof |
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