CN102723595A - Double-frequency communication line stick antenna - Google Patents
Double-frequency communication line stick antenna Download PDFInfo
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- CN102723595A CN102723595A CN2012101969437A CN201210196943A CN102723595A CN 102723595 A CN102723595 A CN 102723595A CN 2012101969437 A CN2012101969437 A CN 2012101969437A CN 201210196943 A CN201210196943 A CN 201210196943A CN 102723595 A CN102723595 A CN 102723595A
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Abstract
The invention discloses a qualitative subscriber identity module (QSIM) double-frequency communication line stick antenna for a mobile phone having mobile payment service. An antenna sticker comprises a 13.56MHz antenna and a 6.78MHz antenna which are axially symmetrical; wherein, the 13.56MHz antenna is a rectangular coil formed by spiral winding; the 6.78MHz antenna is a splay-shaped antenna which is formed by spirally and serially winding a left mirror image coil and a right mirror image coil; two antennas are respectively positioned on two sides of a magnetic film; the surface where the 6.78MHz antenna is located is adhered to the outer side of a back cover of the mobile phone; and the 13.56MHz antenna and the 6.78 antenna are packaged in a backoff mode through a backoff bonding pad and a chip. The QSIM double-frequency communication line stick antenna has the advantages that the mutual influence between the 13.56MHz antenna and the 6.78MHz antenna is small, the 6.78MHz antenna is a high-performance antenna of which the receiving antenna is subjected to small blocking of an adjacent channel large signal, and has low cost; and moreover, signals sent by a subscriber identity module (SIM) are ensured to be received by the line sticker can be ensured.
Description
Technical field
The present invention relates to antenna for mobile phone, particularly a kind of QSIM double frequency order wire that is used for the mobile payment service mobile phone pastes antenna.
Background technology
Mobile payment service (Mobile money) will become one of most important development trend coming years, will bring new benefit for the user of global range, and industries such as telecommunications industry, scientific and technological industry and financial service are brought profound influence.At present, the existing scheme of mobile payment technology: double-interface SIM card scheme (DI-SIM), near-field communication (Near Field Communication, NFC) the RFSIM scheme of scheme, 2.45GHz.
The NFC scheme:
NFC unites proposition by manufacturers such as Philip, Nokia, Sonys.It combines radio-frequency card reader, noncontact card and point-to-point function on one chip, be a kind of short-distance wireless communication technology.NFC adopts 13.56MHz as the communication frequency standard, radio frequency standard such as compatible ISO14443, ISO15693, and about 10 centimetres of operating distances, data transmission bauds can be selected 106Kb/s, 212Kb/s or 424Kb/s.The NFC chip is contained on the mobile phone, and mobile phone just can realize paying by mails and reading the information of other NFC equipment or label.The NFC chip is connected by the SWP agreement with the SIM chip.Realize full duplex communication based on voltage and load-modulate principle on holding wire of SWP (C6); Can realize SIM ISO7816 interface definition support simultaneously down 7816 with two interfaces of SWP, and reserved the pin (C4, C8) of expanding the 3rd high speed (USB) interface.SWP has systematically defined the multi-layer protocol from physical layer, link layer to application layer, and has become etsi standard.
The NFC mobile phone has three kinds of mode of operations:
The contactless card simulation model: the NFC mobile phone can be modeled to a contactless card by read/write, and it is passive response in the radiofrequency field that other equipment send only.
Ad hoc mode: the NFC mobile phone all initiatively sends radiofrequency field with other equipment both sides and sets up point-to-point communication.
Reader/writer mode: the NFC mobile phone initiatively sends the radiofrequency field of oneself and removes identification and other NFC equipment of read/write as a read write line.
The DI-SIM scheme:
Double-interface SIM card is in traditional SIM, to add the noncontact radio frequency interface; The antenna that energy coupling and transfer of data are provided is integrated on mobile phone or the flexible PCB; Through contact interface processing tradition GSM order, adopt contactless interface that value-added services such as E-Payment are provided.
Present main flow double-interface SIM card mobile payment solution can realize that various noncontacts move application, such as noncontact mobile payment, stored value card, PBOC debit/credit and other various non-telecommunication applications.It is divided into from the product form formation:
One) all be integrated in SIM antenna and circuit on the SIM;
Two) circuit is integrated in the SIM, antenna is drawn and is placed on the mobile phone or the battery of mobile phone back side;
Three) circuit and antenna are all outside SIM, such as the I-SIM scheme of Motorola.
The QSIM scheme:
Pos machine, and public transport equifrequent majority at present is 13.56MHz, so our payment scheme is wanted compatible present reader.Payment scheme adopts the form of 13.56MHz transmitting-receiving.But be placed on the interior SIM of mobile phone or the shielding action of SD card, and the receiving sensitivity of present reader is enough high, makes to be difficult to singly deposit and use 13.56MHz directly to carry out two-way communicating by letter with reader.Therefore, we have adopted the SIM13.56MHz reception, and send the passive mobile phone line subsides of the frequency of 6.78MHz to high receiving sensitivity, and line is attached to the mobile phone back of the body and covers.Line pastes the load-modulated that the signal of 6.78MHz is changed into conventional passive card, and information is passed to reader, accomplishes the communication of whole link.Such design only need be used the SIM of QSIM, pastes a line on the mobile phone and pastes and get final product, need not start machine and reader just can with reader compatibility uses such as the pos machine of existing various 13.56MHz and mass transit card.The line of the QSIM scheme of pasting has been got rid of NFC simultaneously and need have been changed mobile phone, and double-interface card has a SIM external antenna use inconvenience that is connected with SIM and the matters of often damaging.
It is very faint to shield strong mobile phone sending signal; And the field intensity of the antenna transmission of reader is big field intensity; This just means that the antenna of the line subsides 6.78MHz of conventional spiral shape can receive the reader transmission signal of very big 13.56MHz equally, and this signal can block the receive channel of chip.This typically faces strong signal blocking also needs antenna to solve.
Under above-mentioned metal environmental condition and limited area, how to design two high performance antennas that influence is little, to be faced the little antenna of strong signal blocking be the key issue that needs solve to reception antenna simultaneously.
Summary of the invention
The technical problem that the present invention will solve provides a kind of QSIM double frequency order wire that is used for the mobile payment service mobile phone and pastes antenna; It is the double frequency communication antenna under metal environmental condition and limited area that this line pastes antenna; That antenna and 6.78MHz antenna with 13.56MHz influences each other is less, 6.78MHz antenna reception antenna is faced little high performance antenna of strong signal blocking and the low characteristics of cost, can guarantee that line pastes the reception of SIM being sent signal.
Technical solution of the present invention is following:
A kind of QSIM double frequency order wire that is used for the mobile payment service mobile phone pastes antenna; Its characteristics are; This line pastes the antenna that comprises axisymmetric 13.56MHz antenna and axisymmetric 6.78MHz; Described 13.56MHz antenna is the rectangular coil that spiral twines; Two 8 font antennas that the series connection of mirror image coil constitutes about described 6.78MHz antenna spiral twines; The antenna of described 13.56MHz antenna and 6.78MHz is distributed in the two sides of a thin magnetic film; The antenna of described 13.56MHz antenna and resonant capacitance and 6.78MHz and resonant capacitance thereof are that the printed circuit of the double layer of metal plate on polyester film or polyimides flexible parent metal constitutes, and in the inner space of the aerial coil of described 13.56MHz antenna and 6.78MHz antenna, couple together the resonant capacitance of the antenna that constitutes described 13.56MHz antenna resonance electric capacity and 6.78MHz respectively by investing many metal fine bars on the described base material; The sticking back of the body that is posted on mobile phone of the place face of the antenna of described 6.78MHz covers, and the antenna of described 13.56MHz antenna and 6.78MHz carries out through a back-off pad and chip that back-off encapsulates.
The scope of the antenna of described 13.56MHz and the resonance frequency of resonant capacitance thereof is 13MHz～14.5MHz.
The antenna of described 13.56MHz and the optimum resonant frequency of resonant capacitance thereof are 13.56MHz.
The scope of the antenna of described 6.78MHz and the resonance frequency of resonant capacitance thereof is 4.5MHz～9MHz.
The antenna of described 6.78MHz and the optimum resonant frequency of resonant capacitance thereof are 6.78MHz.
Above-mentioned QSIM double frequency order wire pastes the preparation method of antenna; The inner space of the aerial coil of described 13.56MHz antenna and 6.78MHz antenna; Couple together the resonant capacitance of the antenna that constitutes described 13.56MHz antenna resonance electric capacity and 6.78MHz respectively by investing many metal fine bars on the described base material; Be after adopting same flexible PCB to adopt the integrated circuit technique preparation; At a certain edge contraction of antenna, and sticking card forms to the two sides of described magnetic film, and the place face of the antenna of described 6.78MHz glues and is posted on the shell near mobile phone.
Technique effect of the present invention is following:
1, a kind of QSIM double frequency order wire that is used for the mobile payment service mobile phone pastes antenna; Paste as passive line; The antenna of the 13.56MHz that this line pastes receives the alternating magnetic field of reader antenna, and converts thereof into alternating current, and the AC/DC change-over circuit of chip will produce the required voltage of self work; In load-modulate, use low-resistance switch short circuit antenna, make the equivalent load of antenna of reader change, and then produce the fluctuation of voltage that the signal in line is pasted passes to reader.This part is identical with the working method of the standard card chip of the 13.56MHz of routine, has normal function.
2, the present invention is the helical antenna of the print circuit plates making on polyester film or polyimides flexible parent metal.13.56MHz with the antenna of 6.78MHz all be the induction reactance form, chip is the capacitive reactance form.13.56MHz antenna and circuit resonance near 13MHz～14.5MHz, resonance frequency is as far as possible near 13.56MHz, to receive energy as much as possible.6.78MHz antenna and circuit resonance near 6.78MHz, to receive the signal that abundant SIM sends.Because the intensity of signal is directly proportional with the quality factor of antenna and circuit-formed series circuit, if resonance frequency near the frequency of sending, the induced potential that the induced potential of circuit port equals antenna ends multiply by the quality factor of series circuit; General resonance frequency is lower than the 6.78MHz frequency, and this antenna and circuit-formed resonance peak can play the filter action certain to the signal of 13.56MHz like this, and the signal of the 13.56MHz that the antenna of reduction 6.78MHz receives disturbs.Therefore, the resonance frequency operated by rotary motion of this part is between 4.5MHz～9MHz.
But the quality factor q of 6.78MHz antenna can not be too high, and too high meeting causes the signal ring, and the demodulation meeting is gone wrong.Therefore the antenna of 6.78MHz can not mainly rely on the quality factor of antenna and circuit to the strong signal suppressing of the reader of 13.56MHz.Adopt filtering mode, must need a large amount of inductance and electric capacity, can cause that integral thickness is blocked up, solder joint must cause that too much reliability reduces, and components and parts are too much, will inevitably reduce a series of problems such as receiving signal strength signal intensity.The antenna of the antenna of 6.78MHz and 13.56MHz is in same space simultaneously; All overlapping or overlap; This must cause that two antennas have bigger coupling coefficient, means that the resonance adjustment of antenna will be very difficult, and two antennas interfere with each other generation simultaneously.How to reduce the coupling coefficient of two antennas, and then reduce both disturbing mutually.The present invention adopts is the reception antenna that 8 word antennas of the reverse winding of series connection are 6.78MHz; 6.78MHz antenna be that the antenna that two spirals of being connected in series twine is a left and right sides mirror image, one of them spins upside down the form that is connected in series after 180 degree; Online subsides and reader antenna symmetric position, 8 word antennas of reverse symmetry can be offset the field intensity of most of reader antenna, in case get into asymmetrical position and in-plant the time, the signal of 13.56MHz still just can block the passage of 6.78MHz.Therefore the antenna of this antenna and 13.56MHz should be arranged along the long limit that 13.56MHz rectangle line pastes respectively on the two sides of magnetic film, and the antenna place face of 6.78MHz is sticking to be posted on outside the mobile phone back of the body lid.The antenna of the 6.78MHz of the line subsides antenna of spiral-shaped 13.56MHz and spiral-shaped 8 word shapes that oppositely link to each other of two series connection is an axial symmery shape; The coupling coefficient of two antennas approaches 0; Both disturb mutually can be reduced to minimum; And two antenna area can try one's best big, to increase receiving ability separately.Magnetic film has the effect of high magnetic permeability, and the reader signal of 13.56MHz is most can be walked along magnetic film, and no longer gets into the antenna of 6.78MHz.Because the back of the body of mobile phone lid has certain thickness, its battery apart from mobile phone has several mm, thus battery of mobile phone down still the signal of the signal that sends of the outer SIM of the battery of mobile phone 6.78MHz that still can be pasted by line receive.Such design can be broken away from the symmetric position restriction of mobile phone and reader antenna, has enlarged the area of using, and has made things convenient for client's use.
The reception antenna of the 6.78MHz of 8 fonts also can be offset the signal strength that SIM sends.Because the asymmetric position of SIM in mobile phone; Generally speaking, the position of SIM is in the position of battery near the mobile phone top in the outside of battery; And in below battery; Certain side of the bottom of general inclined to one side battery, such SIM distributes and makes magnetic field get into the signal strength signal intensity difference of two rings of 8 fonts of line subsides, and the antenna of the 6.78MHz of such 8 fonts just can be offset; When offsetting the high reject signal of reader of most of 13.56MHz, receive the signal of the 6.78MHz that SIM sends.
4, the present invention adopts and to invest many metal fine bars of double layer of metal plate on the base material and couple together the resonant capacitance of the antenna that constitutes described 13.56MHz antenna resonance electric capacity and 6.78MHz respectively.
Because the inside capacitive reactance of chip is not enough, adopt the double layer of metal on thin base material two sides to make capacity plate antenna here.This method also is one of capacitive way of the making antenna used always, but antenna is the magnetic field model that is operated in the near field, and large-area capacity plate antenna metal can produce eddy current; The magnetic line of force of the magnetic direction of eddy current and the electromagnetic field of incident is in the opposite direction; Can offset the magnetic field of incident, just can reduce the received field strength of 13.56MHz, also can reduce the signal strength signal intensity of 6.78MHz; Therefore our plate aerial adopts the parallel lines form of small size; On one side each lines are connected at certain, this just is together in parallel the capacity plate antenna of small size equivalently, increases the numerical value of capacity plate antenna.Such design becomes the eddy current of large-area metal into the metal eddy current of small size, and the electric current of the eddy current of small size, for large-area metal eddy current, can be very little, and then the little linear capacity plate antenna of parallel connection can reduce the negative effect of eddy current.
5, adopt the back-off packing forms between chip of the present invention and the antenna, except the chip of back-off, do not have extra components and parts, feasible whole very thin thickness, reliability might as well.
If use chip to produce enough electric capacity, can cause two problems like this: one) antenna is for resonance, and very difficult design is inductance accurately; Two) electric capacity can occupy area of chip in the chip, can increase the cost of chip; Antenna produces capacity plate antenna can bring two benefits: 1) adjustment of the resonance frequency of antenna can be adjusted through the area size of shearing capacity plate antenna, than being easier to; 2) capacity plate antenna of antenna double layer of metal generation, not extra increase cost of manufacture.If adopt chip external welding resonant capacitance can increase cost, reduce reliability.Chip adopts the back-off packing forms, and chip is very thin, generally is the thickness about 100um; And the thickness of magnetic film; Generally be 100um～200um, that is to say magnetic film hollow out, both can realize that smooth and firm line pastes chip position; Can put into the space between mobile phone back of the body lid and the battery again, thick then put to enter.In a word, use the antenna panel electric capacity and the back-off encapsulation of lines shape, in chip position magnetic film small size hollow out, can realize that cost is low, the thin line that reliability is high pastes.
In a word; It is the double frequency communication antenna under metal environmental condition and limited area that antenna line of the present invention pastes; That antenna and 6.78MHz antenna with 13.56MHz influences each other is less, 13.56MHz antenna reception antenna is faced little high performance antenna of strong signal blocking and the low characteristics of cost, can guarantee that line pastes the reception of SIM being sent signal.
Description of drawings
Fig. 1 is the systematic schematic diagram that QSIM line of the present invention pastes payment scheme;
Fig. 2 is that existing QSIM double frequency communication handset is pasted the structure chart of putting;
Fig. 3 is that existing overlapping reduced the antenna sketch map of coupling coefficient;
Fig. 4 is the antenna sketch map that existing two antennas arranged side by side reduce coupling coefficient;
Fig. 5 is that structural representation is put in double frequency communication handset antenna line subsides of the present invention;
Fig. 6 is that QSIM double frequency order wire of the present invention pastes the antenna sketch map that antenna launches tiling;
Fig. 7 is the syndeton sketch map of the 8 font antennas of 6.78MHz among the present invention;
Among the figure:
The SIM chip main modular block diagram of 10-QSIM; The 11-SIM microcontroller; The digital baseband of the SIM chip of 12-QSIM; The 13.56MHz receiving element of the SIM chip of 13-QSIM; The 6.78MHz transmitter unit of the SIM chip of 14-QSIM; The transceiver toggle switch of the SIM chip of 15-QSIM; The near field dual-mode antenna of the SIM chip of 16-QSIM; The line of 17-QSIM pastes chip main modular block diagram; The line of 18-QSIM pastes the chip base band; The line of 19-QSIM pastes the 6.78MHz received RF unit of core; The line of 110-QSIM pastes the 13.56MHz energy receiving element of core; The line of 111-QSIM pastes the 6.78MHz near field antenna of core; The line of 112-QSIM pastes the 13.56MHz load-modulate unit of core; The line of 113-QSIM pastes the 13.56MHz near field antenna of core; 114-13.56MHz reader read head; 115-13.56MHz reader antenna;
The 20-magnetic film; 21-top-level metallic coil antenna; 22 underlying metal coil antennas; 23 back-off pads;
The 30-magnetic film; 31-13.56MHz helical antenna; 32-6.78MHz helical antenna; 33-back-off pad;
The 40-magnetic film; 41-13.56MHz antenna; 42-6.78MHz antenna; 43-13.56MHz resonant capacitance; The parallelly connected line part of 44-resonant capacitance lines; 45-6.78MHz resonant capacitance; The back-off pad of 46-chip;
50-mobile phone main body; 51 SIM cards of mobile phones; The 52-battery of mobile phone; 53 mobile phones back of the body lid; The 54-line pastes the antenna of 6.78MHz; The 55-line pastes magnetic film; The 56-line pastes 13.56MHz antenna and chip;
The 60-line pastes the 13.56MHz antenna; The 61-magnetic film; 62-13.56MHz the capacity plate antenna of chip port parallel connection; The back-off pad of 63-chip; The 64th, the folding position is the line metal connection incessanly; 65-cutting edge; 66-6.78MHz antenna; 67-6.78MHz the capacity plate antenna of chip port parallel connection
70-6.78MHz the left-half of 8 font antennas; 71-6.78MHz the right half part of 8 font antennas; The part that two series connection antennas of 72-connect.
Embodiment
For making the object of the invention, technical scheme and advantage clearer; Below in conjunction with embodiment and accompanying drawing, technical scheme of the present invention is carried out clear, intactly description, obviously; Described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
See also Fig. 1 earlier, Fig. 1 is that the theory diagram of QSIM line subsides scheme of the present invention is seen figure.Paste its operation principle of schematic diagram 1 simple the present invention of description of scheme below with the QSIM line:
QSIM chip 10 is integrated in the SIM of mobile phone with transmitting-receiving near field antenna 16, and SIM chip 10 is communicated by letter with the microcontroller 11 that SIM carries, and microcontroller 11 and mobile communication realize that the QSIM chip among the SIM is connected with the signal of mobile phone.QSIM chip 10 parts mainly are made up of the transmitter unit 13 of digital baseband 12,6.78MHz, receiving element 14 and the antenna change-over switch unit 15 of 13.56MHz.The antenna 16 of SIM is near field antenna, realizes receiving the 13.56MHz signal and the function that sends to line subsides 6.78MHz signal of reader.The major function that the line of passive work pastes chip 17 is to use the antenna 110 of 13.56MHz to receive the electromagnetic wave that reader antennas 114 send, and converting the electric energy that exchanges to direct current by the energy receiving element 110 of 13.56MHz provides chip 17 work.6.78MHz near field antenna 111 receive the electromagnetic wave of the near field 6.78MHz that the antenna 16 of QSIM sends; Convert thereof into AC signal and pass to the receiving element 19 that line pastes the 6.78MHz of chip 17; After receiving element 19 demodulation signal is passed to the baseband portion 18 that line pastes chip 17; The signal of 18 pairs of receptions of baseband portion is decoded; Convert the load modulation signal of 13.56MHz after the processing to, pass to the load-modulate unit 112 that line pastes the 13.56MHz of chip 17, the antenna 113 of the 13.56MHz that load-modulate unit 112 modulation lines are pasted.This load-modulate information can be received by the antenna 115 of reader 114, and 114 with its demodulating and decoding.This line-transect pastes just have been realized that SIM 6.78MHz transmits and has converted the load modulation signal of the 13.56MHz that conventional 13.56MHz standard card that reader can receive processing realizes to.
The size of carrying on the back lid owing to mobile phone is limited, and it is passive work that line pastes, and its energy is the metal environment from the electromagnetic wave that reader sends simultaneously, so the antenna area of the 13.56MHz of line subsides is big, to guarantee that obtaining enough big energy provides chip operation.And different mobile is different to the shielding action of SIM, and what have is big, and what have is little.The power consumption of SIM is that clear and definite restriction is arranged simultaneously, can not be too big, mean that the sensitivity of the chip that receives 6.78MHz wants high, and high sensitivity often means big power consumption.Therefore the antenna of 6.78MHz also will have the reception that bigger area could guarantee SIM is sent signal.
6.78MHz the antenna 113 of antenna 111 and 13.56MHz in same space; All overlapping or overlap; This must cause that two antennas have bigger coupling coefficient, means that the resonance adjustment of antenna will be very difficult, and two antennas interfere with each other generation simultaneously.How to reduce the coupling coefficient of two antennas, and then reduce both disturbing mutually.Existing general method is that two helix coil antennas are overlapped, and sees Fig. 2.Magnetic film 20 pads among Fig. 2 are in the antenna bottom; Top-level metallic coil antenna 21 is overlapped to reduce both coupling coefficients with underlying metal coil antenna 32; Chip and antenna adopt the back-off form to be encapsulated in back-off pad 33 positions.Because the inside and outside magnetic direction of coil is opposite, can carefully adjust overlapping and nonoverlapping area, it is lower that the coupling coefficient of two antennas can be done.But can reduce the area of antenna separately like this, entire area with regard to limited prerequisite under, it is poor that performance separately all can become.
The method of two antenna coupling coefficients of a kind of in addition reduction is exactly that two antennas discharge side by side, does not overlap, and sees Fig. 3.Magnetic film 30 pads are in the bottom of antenna among Fig. 3, and 13.56MHz helical antenna 31 has occupied big area; 6.78MHz helical antenna 32 occupies a small size; Chip and antenna adopt back-off to be encapsulated in the position of back-off pad 43.Because two sky line parallels are to the just reduction of utilization in space; The chip that isochrone pastes is passive work, and energy is the most basic, therefore generally is that the antenna of 13.56MHz is big, and the antenna of 6.78MHz is little, and this itself will reduce the receiving ability of 6.78MHz antenna.
The antenna of alternative 13.56MHz and the antenna of 6.78MHz are put form such as Fig. 4.6.78MHz antenna inner at the antenna of 13.56MHz, be designed to axial symmery shape; 6.78MHz antenna adopt the 8 font antennas that connect in the middle of reverse the winding; It is minimum with the antenna coupling coefficient of 13.56MHz like this; It is in the time of the position of reader antenna symmetry simultaneously, and the coil of two 8 fonts is opposite owing to its winding direction, thereby can offset the channel block of the strong signal of 13.56MHz reader to 6.78MHz; But in asymmetrical position, the channel that the strong signal of reader can block 6.78MHz equally receives.Therefore its operable zone is narrow relatively.
As shown in Figure 5, line of the present invention pastes puts structure chart.Mobile phone main body 50 comprises cell phone mainboard, display screen, and structures such as antenna, about the about 33mm * 51mm of battery 52 stock sizes of mobile phone, SIM 51 is sometimes below battery of mobile phone 52, sometimes in battery of mobile phone 52 outsides.The antenna that line pastes adopts folding form, and wherein the antenna 56 of the antenna 54 of 6.78MHz and 13.56MHz is respectively on 55 two sides of magnetic film, and the antenna of 6.78MHz is near the back of the body lid 53 of mobile phone.Because two antennas are axially symmetric structures, and the antenna of antenna 54 employings 8 fonts of 6.78MHz, so the mutual coupling of two antennas of line subsides is very little, can ignore.Because magnetic film 55 is high-permeability materials, the magnetic line of force majority of the 13.56MHz that reader sends is walked in magnetic film simultaneously, does not pass the antenna that magnetic film gets into 6.78MHz, so the receiving port of 6.78MHz does not just receive reader to send the obstruction of signal; While magnetic film 55 has been isolated the metal of mobile phone, reduces the metal eddy current performance that line pastes 13.56MHz56 is reduced infringement, guarantees it and takes the magnetic field of enough readers, guarantees that the line subsides can passive work.6.78MHz antenna 54 and battery of mobile phone 52 between have the mobile phone back of the body cover 53 to isolate, so it can receive the 6.78MHz signal of SIM transmission.This structure uses magnetic film to isolate the interference blocking of reader, and the antenna overall diameter size of 6.78MHz is the same big with the antenna of 13.56MHz simultaneously, and the present invention compares 6.78MHz with the design of Fig. 4 area strengthens performance boost.
Fig. 6 is that QSIM double frequency order wire of the present invention pastes the antenna plane unfolding assumption diagram; Visible by figure; QSIM double frequency order wire of the present invention pastes antenna, comprises the antenna 66 of axisymmetric 13.56MHz antenna 60 and 6.78MHz, and described 13.56MHz antenna 60 is rectangular coils that spiral twines; At these 13.56MHz antenna 60 long limit extending directions are antennas 66 of described 6.78MHz; Two 8 font antennas that the series connection of mirror image coil constitutes about the antenna 66 of this 6.78MHz is twined by spiral, the antenna 66 of described 13.56MHz antenna 60 and 6.78MHz carries out the back-off encapsulation through a back-off pad 63 and chip, and the bottom surface that this antenna line pastes has magnetic film 61.The antenna 66 of described 13.56MHz antenna 60 and 6.78MHz and the printed circuit that resonant capacitance is double layer of metal plate on polyester film or polyimides flexible parent metal thereof constitute; In the inner space of described aerial coil, invest many metal fine bars on the base material and couple together the resonant capacitance 67 of the antenna that constitutes described 13.56MHz antenna resonance electric capacity 62 and 6.78MHz respectively.
6.78MHz antenna 66 be connected with the encapsulation welding tray 63 of chip through thick relatively metal connecting line 64.Regional cutting edge 65 folding caves inward, and is slightly larger than 2mm approximately apart from metal connecting line 64, and the folding of flexible PCB is convenient in such design.
Fig. 7 is the sketch map of the 8 font antennas of 6.78MHz among the present invention; 6.78MHz the right half part 71 of left-half 70 and the 8 font antennas of 6.78MHz of 8 font antennas are two coils of mirror image up and down; The part 72 of two series connection antenna connections is in the centre of adjacent windings.Antenna has just constituted the structure of 8 fonts like this.In the uniform magnetic field of symmetry, to cancel out each other be 0 to the induced potential of two of antenna ports in theory.
Antenna centre position among Fig. 6 adopts the double layer of metal of flexible PCB to make the antenna resonance electric capacity 67 of 13.56MHzz antenna resonance electric capacity 62 and 6.78MHz, not extra like this increase cost; Antenna adopts numerous long and narrow lines electric capacity; The parallel-connection structure that uses lines to connect in a certain side; Avoided large-area metal like this in the ring of antenna, large-area metal can produce the performance that big eddy current reduces antenna, and the shunt capacitance structure of long and narrow lines; Eddy current reduces greatly, and then greatly reduces the negative effect of eddy current.The antenna resonance of actual 13.56MHz is good more the closer to 13.56MHz, and the antenna resonance of 6.78MHz is near 6.78MHz.So both realize low cost, guaranteed high-performance again.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (6)
1. a QSIM double frequency order wire that is used for the mobile payment service mobile phone pastes antenna; It is characterized in that; This line pastes the antenna (66) that comprises axisymmetric 13.56MHz antenna (60) and axisymmetric 6.78MHz; Described 13.56MHz antenna (60) is the rectangular coil that spiral twines; Two 8 font antennas that the series connection of mirror image coil constitutes about described 6.78MHz antenna (66) spiral twines; The antenna (66) of described 13.56MHz antenna (60) and 6.78MHz is distributed in the two sides of a thin magnetic film (61); The antenna (66) of described 13.56MHz antenna (60) and resonant capacitance (62) and 6.78MHz and resonant capacitance (67) thereof are that the printed circuit of the double layer of metal plate on polyester film or polyimides flexible parent metal constitutes; Inner space at antenna (66) aerial coil of described 13.56MHz antenna (60) and 6.78MHz; Couple together the resonant capacitance (67) of the antenna that constitutes described 13.56MHz antenna resonance electric capacity (62) and 6.78MHz respectively by investing many metal fine bars on the described base material, the sticking back of the body that is posted on mobile phone of the place face of the antenna of described 6.78MHz (66) covers, and the antenna (66) of described 13.56MHz antenna (60) and 6.78MHz carries out through a back-off pad (63) and chip that back-off encapsulates.
2. QSIM double frequency order wire according to claim 1 pastes antenna, it is characterized in that the scope of the antenna of described 13.56MHz and the resonance frequency of resonant capacitance thereof is 13MHz～14.5MHz.
3. QSIM double frequency order wire according to claim 1 pastes antenna, it is characterized in that the antenna of described 13.56MHz and the optimum resonant frequency of resonant capacitance thereof are 13.56MHz.
4. QSIM double frequency order wire according to claim 1 pastes antenna, it is characterized in that the scope of the antenna of described 6.78MHz and the resonance frequency of resonant capacitance thereof is 4.5MHz～9MHz.
5. QSIM double frequency order wire according to claim 1 pastes antenna, it is characterized in that the antenna of described 6.78MHz and the optimum resonant frequency of resonant capacitance thereof are 6.78MHz.
6. QSIM double frequency order wire according to claim 1 pastes the preparation method of antenna; It is characterized in that; 6.78MHz antenna (66) that described antenna line pastes and the antenna (60) of 13.56MHz are after adopting same flexible PCB to adopt the integrated circuit technique preparation; At a certain edge contraction of antenna, and sticking card forms to the two sides of described magnetic film (61), and the place face of the antenna of described 6.78MHz (66) glues and is posted on the shell near mobile phone.
Priority Applications (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113972468A (en) * | 2021-10-26 | 2022-01-25 | 维沃移动通信有限公司 | Antenna and electronic device |
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