CN104701638A - Highly shield SIM side-inserted cellphone all-card scheme antenna - Google Patents

Abstract

The invention discloses a highly shield SIM side-inserted cellphone all-card scheme antenna. The antenna comprises a card support antenna used for enhancing a passive signal and applied to a radio-frequency identification system, and a cellphone closely-coupled patch antenna; the cellphone closely-coupled patch antenna is composed of a small antenna and a large antenna, the two of which are connected in series by use of a third tuned capacitor; the small antenna is closely coupled with the card support antenna. The highly shield SIM side-inserted cellphone all-card scheme antenna enables a reader to receive signals sent by an SIM card; the coupling coefficient of the SIM card and the reader is further increased; as a result, good communication between the side-inserted cellphone SIM card and the reader can be realized.

Description

Shield strong SIM side and take part in machine full card scheme antenna

Technical field

The present invention relates to REID, particularly a kind ofly shield strong SIM side and take part in machine full card scheme antenna.

Background technology

By impact that is Japanese and Korea S's mobile-phone payment, small amount payment is the field that operator expects to enter always.Due to can very well in real time pay and on-site payment solution is provided, contactless close distance radio frequency identification has very wide application prospect, and the mobile payment industry for current slower development is brought unprecedented opportunities.And will be the new developing direction in Future Ten year in conjunction with a tractor serves several purposes of mobile terminal and RFID technique or one card for multiple uses.Particularly in the 3G epoch, the ubiquitous rfid interrogator with wireless connecting function and the RFID of contactless application will be the most important things developed.Current industry mainly contains the solution of two covers based on non-contact technology: Combi SIM card scheme and near-field communication (NFC) scheme.

Combi SIM card scheme, also known as double-interface SIM card scheme, refers to replace interior of mobile phone SIM card by Combi SIM card, the SIM card function basis retaining former contact interface increases contactless IC card application interface.More typical way has two kinds: one, the noncontact antenna printing of contactless IC card on a plastic film, then be labelled to SIM card surface; Two, contactless IC card noncontact antenna as one independently parts be attached in mobile phone, antenna is guided to front or the reverse side of mobile phone, antenna is connected on still untapped C4 and C8 of SIM card two interfaces.But the shortcoming of this two schemes is: antenna is attached to SIM card surface or is drawn out to mobile phone front or reverse side, be easy to cause a day thread breakage, damage in installation process, and cause user to use inconvenience, simultaneously due to the shielding action of battery of mobile phone and circuit board, signal and the reflection of the reader that double-interface SIM card can receive are all very faint to the signal of reader.Therefore, the non-constant of the quality communicated between double-interface SIM card and reader, reader almost can not receive the response that double-interface SIM card returns.

And NFC scheme in recent years proposes a kind of new scheme about radio-frequency (RF) identification by companies such as Nokia, Philips, basic way is the RFID module added in newly-designed mobile phone for paying, and intercoms mutually between RFID module and mobile phone by special communication protocol.This method can solve the problem utilizing mobile phone to carry out radio-frequency (RF) identification better, but shortcoming is user must go to transform existing mobile phone, the mobile phone that even purchase one is brand-new, this method that can receive present stage not all user, and be also the very large wasting of resources for entire society.

Due to the shielding action of battery of mobile phone and circuit board, be applied in mobile phone environment if double-interface IC card replaces existing common SIM cards, double-interface IC card reliably cannot receive the command signal that reader sends, the signal that double-interface IC card sends simultaneously will significantly be decayed after mobile phone environment, and so little answer signal cannot be received by reader and distinguish.

Owing to being generally all live line work in mobile phone use procedure, be exactly that open state is transacted business, therefore at SIM card design transmission circuit and antenna, after receiving the transmission instruction of reader, initiatively launch a corresponding signal to reader, make reader can receive the signal of similar passive load modulation easily, and then most of SIM cards of mobile phones can be realized directly communicate with reader, user only needs to change mobile phone SIM, without the need to changing mobile phone.

But the program is for slotting ring border, SIM card side, as Fig. 1, wherein draw-in groove 11 top 21 is metal structures, and SIM12 is placed in Kato 13, then inserts draw-in groove 11..The motherboard circuit plate 16 of mobile phone is generally arranged at the bottom of draw-in groove 11, and place vacant on circuit board all can not be limited to ground, the metallic shield that equivalence is powerful.And mobile phone frame 14 is in order to good-looking, a lot of mobile phone is all designed to metal edge frame, and the Kato 13 Kato side rising portion 15 of mobile phone is also all metal.Cell phone back cover 17 has plenty of metal.Fig. 3 is the structural representation of SIM card antenna, and antenna 32 is spiral coils, by port 31 connecting circuit.The bottom of SIM card also has the hard contact 33 of larger area.The magnetic field of antenna 32 sends the plane of perpendicular antenna, and the magnetic line of force is once out encountering large-area metal, and the electromagnetic field of alternation can produce eddy current, and the magnetic direction of eddy current is contrary with the direction of original electromagnetic field.SIM card periphery has constructed the strong shielding construction that a metal surrounds, and electromagnetic field is difficult to transport out.The signal that SIM card is sent can be very little, and the sensitivity of the reader that existing cloth is good is not very high, and reader receives difficulty.

Summary of the invention

The present invention solve prior art active transmitting SIM card entirely block in SIM card side insert the inoperable problem of shielding rival machine.Found by handset structure analysis, the position shielding of SIM card is the strongest, the locus shielding that the SIM card side of Kato is left and taken in order to mechanical structure that Kato ejects is more weak, the present invention by devising the antenna with SIM card antenna-coupled on Kato, or adopts the method for gold gold contact signal to be transferred to the side of Kato.

The present invention devises one and the closely-coupled antenna of SIM card line that day in one aspect between mobile phone Kato and SIM card, is referred to as Kato antenna afterwards.Kato antenna is made up of two parts, antenna and Kato SIM card side antenna two parts composition under Kato SIM card.The size of the helical antenna coil under Kato SIM card on the size of antenna and SIM is suitable, and the vertical range of two antennas is close to, and now both coupling coefficients are maximum.The electromagnetic field that just SIM card can be allowed to launch to be transferred directly under Kato SIM card on antenna.

The frame taking part in machine due to a lot of SIM card side is metal edge frame, and the PCB layout in mobile phone all can cloth Shangdi in the place not having components and parts, and the signal that therefore SIM cards of mobile phones side antenna is enough to SIM card is sent receives by reader.

The present invention also devises the antenna be coupled with Kato antenna secondary outside mobile phone, mobile phone sticker antenna.This antenna also has two kinds of forms, and one is close from Kato side insertion Kato and the antenna close coupling of Kato SIM card side, and another form is the form of closing with Kato SIM card side antenna loose coupling outside the mobile phone of Kato side.

Therefore, through being repeatedly coupled, can transfer to outside mobile phone by transmitting of SIM card, such SIM card just can carry out good communication with reader.

Concrete technical solution scheme of the present invention is as follows:

A kind ofly shield strong SIM side and take part in machine full card scheme antenna, its feature is, comprise the Kato antenna for the enhancing passive signal of radio-frequency recognition system and mobile phone close coupling conjunction subsides antenna, described mobile phone close coupling is closed subsides antenna and is made up of miniature antenna and large antenna, described miniature antenna and large antenna are connected through the 3rd tuning capacitance, and miniature antenna and described Kato antenna close coupling are closed;

Described Kato antenna, comprising: antenna, Kato SIM card side antenna and the first tuning capacitance under Kato SIM card, and under described Kato SIM card, antenna and Kato SIM card side antenna are connected through tuning capacitance; Antenna close coupling under described Kato SIM card in antenna and SIM card is closed, or SIM card contact directly contacts with Kato antenna contacts, the SIM card of SIM card position strong for shielding being transmitted transfers on Kato line, this line is directly connected with SIM card side antenna, and magnetic field is shielding weak SIM card side by radiation.

For a Kato antenna for the enhancing passive signal of radio-frequency recognition system, comprising: antenna, Kato SIM card side antenna and the first tuning capacitance under Kato SIM card, under described Kato SIM card, antenna and Kato SIM card side antenna are connected through tuning capacitance; Antenna close coupling under described Kato SIM card in antenna and SIM card is closed, or SIM card contact directly contacts with Kato antenna contacts, the SIM card of SIM card position strong for shielding being transmitted transfers on Kato line, this line is directly connected with SIM card side antenna, and magnetic field is shielding weak SIM card side by radiation.

Antenna close coupling under described Kato SIM card in antenna and SIM card is closed, and under Kato SIM card, the magnetic line of force direction of the magnetic line of force direction of antenna and the antenna of SIM card is all perpendicular to the plane of antenna.

The magnetic field exit direction of described Kato SIM card side antenna comprises: the vertical direction of mobile phone screen, the lateral vertical direction along mobile phone minor face; And along the direction on the long limit of mobile phone.

Compared with prior art, above-mentioned signal enhancing antenna combination has the following advantages:

Kato is separated with SIM card, is not the form of Kato SIM card integration, causes SIM card general, can use at other mobile phones, and no special designs; Because SIM card is active transmitting, can and the reader antenna of various sizes between carry out good communication, meet the reception requirement of the reader of different receiving sensitivity.

By Kato antenna, the circuit of SIM card being received and dispatched port adopts the gold of antenna-coupled form or directly connection gold contact form to transfer to the antenna of Kato SIM card outside from shielding in strong draw-in groove by signal, namely outside draw-in groove, its shielding reduces greatly, and then makes reader can receive the signal of SIM card transmission.By again designing secondary coupling, the coupling coefficient of SIM card and reader can also be strengthened further, side is inserted between SIM cards of mobile phones and reader and realizes good communication.Such design SIM card be still one independently individual, non-tailor-make product is the universal product, and the mobile phone that still can be placed on other types uses.

Accompanying drawing explanation

Fig. 1 is the structural representation that prior art SIM card side is inserted;

Fig. 2 is prior art draw-in groove schematic diagram;

Fig. 3 is prior art SIM card antenna schematic diagram;

Fig. 4 is the basic structure schematic diagram of metal Kato;

Fig. 5 is the SIM card Kato processed;

Fig. 6 is the structural representation of the Kato side processed;

Fig. 7 is the Kato antenna structure view cushioned under SIM card on Kato, and wherein the Kato antenna main field direction of (a) SIM card side is at Z axis; (b): the Kato antenna main field direction of SIM card side is in x-axis; C the Kato antenna main field direction of () SIM card side is in y-axis;

Fig. 8 is the schematic diagram that Kato put into by Kato antenna;

Fig. 9 is the subsides antenna closed with the close coupling of Kato antenna;

Figure 10 is the subsides antenna closed with Kato antenna loose coupling;

Figure 11 is the structural representation of subsides antenna and the mobile phone closed with the close coupling of Kato antenna;

Figure 12 is the structural representation of subsides antenna and the mobile phone closed with Kato antenna loose coupling;

Figure 13 contact SIM card contact design schematic diagram;

Figure 14 contact Kato antenna schematic diagram.

11: draw-in groove; 12:SIM card; 13: Kato; 14: mobile phone frame; 15: Kato side rising portion; 16: cell phone mainboard; 17: cell phone back cover; 21: the metallic shield at draw-in groove top; 22: the spring salient point bottom draw-in groove; 31: antenna port; 32 aerial coils; 33:SIM card contact; 41: Kato ring; 42: the SIM card of Kato holds up step; 43) SIM card ejects salient point; 44) Kato side; 45: the activity space retained in order to Kato ejecting mechanism causes solid metallic region; 46: Kato eject hole; The triangle that 51:SIM fastens; 52: the SIM card of Kato holds up step and extends to Kato side; 53: Kato ejects salient point; 54: Kato lateral opening hole or slotting position; 61: mobile phone frame; 62: Kato; 63: Kato perforate; 64: Kato is slotted; The Kato antenna of 71:SIM card below; The contact of 72:SIM card; 73: through hole; 74: salient point; 75: Kato orientation triangle gap; 76: main field direction is at the Kato antenna of the SIM card side of Z axis; 77: tuning capacitance; 78: main field direction is at the Kato antenna of the SIM card side of x-axis; 79: main field direction is at the Kato antenna of the SIM card side of y-axis; 91: the antenna going deep into mobile phone Kato side in subsides; The part at the mobile phone back side is folded in 92 subsides; 93: tuning capacitance; 94: anti-metal magnetic film; 101: antenna is pasted at the mobile phone back side; 102: antenna is pasted in mobile phone side; 103: anti-metal magnetic film; 104: tuning capacity plate antenna; 111: draw-in groove; 112:SIM card; 113: Kato; 114: Kato antenna; 115: subsides antenna gos deep into the antenna in Kato; 116: the part of Kato groove at side surface or borehole; 117: be the circuit board of mobile phone below Kato; 118: the mobile phone back side; 119: anti-metal magnetic film; 120: the antenna at the mobile phone back side in subsides; 121: draw-in groove; 122:SIM card; 123: Kato; 124: Kato antenna; 125: the part of Kato groove at side surface or borehole; 126: pasting in antenna is the miniature antenna that Kato is coupled; 127: be the circuit board of mobile phone below Kato; 128: the mobile phone back side; 129: anti-metal magnetic film; 130: the antenna at the mobile phone back side in subsides; Two input/output ports of 131:SIM card internal circuit; 141: the antenna port of contact contact; 142: the salient point on contact contact; 143: through hole; 144: the antenna of SIM card side on Kato.

Embodiment

The signal sent owing to covering strong SIM cards of mobile phones at SIM card side table plague will significantly be decayed after mobile phone environment, and reader just cannot receive the answer signal that SIM card returns, and also just cannot realize the proper communication of SIM card and reader.

In view of this, propose to design signal converting antenna outward at SIM card Kato and mobile phone, SIM card signal is forwarded to the antenna combination at SIM cards of mobile phones side or the mobile phone back side.

First the structure of metal Kato is observed, Fig. 4.Kato presents annular 41 substantially, and wherein the inside of annular has the SIM card of Kato to hold up step 42, and SIM card is placed in this position; Kato side 44 is generally all greater than the width of Kato.Kato holds thimble by operator, and eject hole at mobile phone and stare at a lever below mobile phone Kato, the SIM card that this lever can head on mobile phone ejects salient point 43, and SIM is ejected mobile phone.Ejecting structure is a lever construction, is in the bottom of SIM card, needs the space of a motion, and also just there is a space 45 the Kato side of therefore corresponding SIM card.The structure of mobile phone is immotile, but can start the Kato of machine.Since the mobile phone shielding of SIM card position is stronger, but the activity space in order to the reservation of Kato ejecting mechanism of Kato causes top, solid metallic region not have metal draw-in groove, if sent out in this place in the magnetic field of antenna, mean that shielding will reduce greatly.Therefore first we processed the form of draw-in groove as Fig. 5.Remain the triangle 51 in order to locate, the SIM card of Kato be held up step and extends to Kato side 52, Kato ejects salient point 53 and SIM card, and to hold up step 52 equally dark, while at the groove at side surface of Kato or borehole 54.Fig. 6 is the structural representation of the Kato side processed.Mobile phone Kato 62 and mobile phone frame 61 are concordant outside, do not have projection.Wherein the part of the corresponding SIM card of Kato does fluting 64 or 63 process of windowing.

Object Kato being done the process of Fig. 6 can have living space to put an antenna.Fig. 7 is the Kato antenna structure view cushioned under SIM card on Kato.This antenna adopts enough thin base material to design and can be placed in below SIM card, the inner side of Kato.In Kato antenna, mobile phone contact 72 adopts top and bottom two layers metal designs, is connected by through hole 73, and devise the salient point 74 that pressure is got up in the centre position of contact 72, the projection direction of salient point 74 is towards SIM card.The bottom of salient point is just the metal spring salient point 22 of draw-in groove.The contact 33 of playing self is connected with mobile phone by the switching of Kato antenna by such SIM card.Kato antenna remains corresponding recessed gap 75 part for location in the orientation triangle position 51 of Kato.Kato antenna is divided into the antenna 76 of the Kato side of antenna 71 immediately below SIM card and series connection with it, 78 and 79, both are by a tuning capacitance, near wave frequency resonance frequency being adjusted to work, form resonance, therefore play inner electric current comparatively large, antenna serves the amplification of electric current, and the multiple of amplification is the quality factor times of the series loop of Kato antenna.

Antenna immediately below SIM card 71 is close coupled structure with the upper antenna 32 of SIM, therefore rises and the transmission electromagnetic wave major part of SIM card can be coupled under Kato on antenna 71.Under Kato, the magnetic line of force direction of antenna 71 is the same with the magnetic line of force direction of the antenna of SIM card, is all plane that is vertical and antenna.The antenna of Kato side can be the different design in main field direction, and 76 antennas of a in such as Fig. 7 are the Z-direction of magnetic field at the vertical paper of YZ plane, namely the direction of vertical mobile phone screen; Fig. 8 is that in Fig. 7, the schematic diagram of Kato put into by the antenna that drags of a; 78 antennas of the b in Fig. 7 are the Z-direction of magnetic field in XZ plane, namely along the lateral vertical outgoing of mobile phone minor face; 79 antennas of the c in Fig. 7 are the Y direction of magnetic field in XY plane; Magnetic field is closed, and therefore the magnetic line of force is bending having in all directions, and because the shielding intensity of different directions is different, cause mobile phone can be the strongest at the signal of screen cover outgoing, take second place in side, the back side is minimum.That is there is Kato antenna just the signal of SIM card can be transferred to the side spaciousness of Kato, shield little position, and then the signal that SIM card sends just directly can have been received by reader.

Because the signal at the effect mobile phone back side of shielding is still minimum, common customer brush mobile phone is all that the screen of custom mobile phone faces toward oneself, and namely the back side of mobile phone is facing to read write line.Therefore the transfer antenna of stage antenna sense can again be designed, mobile phone sticker antenna.The subsides antenna that Fig. 9 and the close coupling of Kato antenna are closed.Antenna is made up of two consecutive antenna, the undersized antenna 91 wherein going deep into mobile phone Kato side is also the rectangular antenna that spiral winding obtains, the solid metallic region 45 that the activity space that size and Kato ejecting mechanism retain is formed is suitable, insert inside mobile phone from the side 63 or 64 of Kato, form close coupling with the antenna 76 of Kato side and close.The large-size antennae 92 folding into the part at the mobile phone back side in subsides folds into the back side of mobile phone, and this antenna is also the rectangle antenna of spiral winding, and its size is generally with not block machine logo and word, and antenna for mobile phone region is determined.Two antennas by tuning capacitance be tuned to work wave frequency near, to form resonance.Owing to being that close coupling is closed, therefore the transmission efficiency of signal is very high, and mobile phone back side large-size antennae 92 also can not add anti-metal magnetic film 94 with middle can the interpolation in the mobile phone back side.

If dislike and avoid the antenna of subsides to insert mobile phone operation trouble, the subsides antenna that can also close in the design of mobile phone and Kato antenna loose coupling, as Figure 10. wherein large-size antennae 101 is folded in the back side of mobile phone, and small sized antenna 102 is in the mobile phone lateral location of the SIM card Kato of mobile phone.Now 102 and 76 is that loose coupling closes form, and therefore generally speaking pasting antenna needs anti-metal magnetic film 103.Large antenna 101 and miniature antenna 102 are connected with an electric capacity 104 equally, and resonance is near electromagnetic operating frequency.Figure 11 and Figure 12 is the structural representation of subsides antenna and the mobile phone closed with the close loose coupling of Kato antenna respectively.Operator puts into mobile phone after only needing that subsides are placed in the correspondence position of mobile phone protecting case.

No matter be the antenna closed with the close coupling conjunction of Kato antenna or loose coupling, the even antenna 76 much larger than Kato side of antenna 92 or 102 at the mobile phone back side, therefore the coupling coefficient of the antenna of itself and reader can much larger than the coupling coefficient of Kato side antenna 76 with reader antenna, and then the communication capacity of SIM card and reader is greatly enhanced.

Above-mentioned scheme be adopt SIM card antenna and Kato antenna to adopt the mode be coupled to realize by the SIM card side of the transition zone Kato of signal.Because draw-in groove major part is metal, therefore the reduction of eddy current to antenna performance is not allowed to ignore.The mode adopting direct contact to connect can increase the intensity of signal transmission, cuts and reduces eddy current and then improving performance.But the contact of SIM card is all have clear and definite purposes, can not do compatibility.Therefore Figure 13 is in the both sides, long limit of SIM card, and namely the corresponding part of the SIM card picking-up step 42 of Kato devises contact 131.Also the contact 141 of strip is devised at the corresponding part of Kato antenna.Simple gold gold contact meeting loose contact in default of pressure support, therefore row's salient point 142 is devised in the contact 141 of Kato, be coated with the contact 131 of some salient point 142 facing to SIM card, golden contact can be realized connect as long as have the contact of individual salient point and the contact of SIM card connect.The contact 141 of Kato length of antenna bar shaped adopts double layer of metal to design, and use through hole 143 to connect, then connect the antenna 144 of Kato SIM card side respectively, its form is also just like three kinds of forms of Fig. 7.

On the Kato being adopted by the circuit of SIM card transmitting-receiving port antenna-coupled form or the gold gold contact form that directly connects to be transferred to by signal outside SIM card by Kato antenna like this, the mobile phone shielding of this position is weak, and then solves the full cartoon letters problem that machine is taken part in SIM card side.

Disclose as above with preferred embodiment although the present invention is own, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.

Claims (4)

1. the SIM side intervention machine full card scheme antenna that a shielding is strong, it is characterized in that, comprise the Kato antenna for the enhancing passive signal of radio-frequency recognition system and mobile phone close coupling conjunction subsides antenna, described mobile phone close coupling is closed subsides antenna and is made up of miniature antenna (102) and large antenna (101), described miniature antenna (102) and large antenna (101) are connected through the 3rd tuning capacitance (104), and miniature antenna (102) and described Kato antenna (76) close coupling are closed;

Described Kato antenna, comprise: antenna (71), Kato SIM card side antenna and the first tuning capacitance (77) under Kato SIM card, under described Kato SIM card, antenna (71) and Kato SIM card side antenna are connected through tuning capacitance (77); Under described Kato SIM card, antenna (71) closes with the antenna close coupling in SIM card, or SIM card contact directly contacts with Kato antenna contacts, the SIM card of SIM card position strong for shielding being transmitted transfers on Kato line, this line is directly connected with SIM card side antenna, and magnetic field is shielding weak SIM card side by radiation.

2. the Kato antenna for the enhancing passive signal of radio-frequency recognition system, it is characterized in that, comprise: antenna (71), Kato SIM card side antenna and the first tuning capacitance (77) under Kato SIM card, under described Kato SIM card, antenna (71) and Kato SIM card side antenna are connected through tuning capacitance (77); Under described Kato SIM card, antenna (71) closes with the antenna close coupling in SIM card, or SIM card contact directly contacts with Kato antenna contacts, the SIM card of SIM card position strong for shielding being transmitted transfers on Kato line, this line is directly connected with SIM card side antenna, and magnetic field is shielding weak SIM card side by radiation.

3. Kato antenna according to claim 1, it is characterized in that, under described Kato SIM card, antenna (71) closes with the antenna close coupling in SIM card, and under Kato SIM card, the magnetic line of force direction of the magnetic line of force direction of antenna (71) and the antenna of SIM card is all perpendicular to the plane of antenna.

4. Kato antenna according to claim 1, is characterized in that, the magnetic field exit direction of described Kato SIM card side antenna comprises: the vertical direction of mobile phone screen, the lateral vertical direction along mobile phone minor face; And along the direction on the long limit of mobile phone.