WO2012075851A1

WO2012075851A1 - Sensing antenna and device with sensing antenna

Info

Publication number: WO2012075851A1
Application number: PCT/CN2011/080547
Authority: WO
Inventors: 刘建江
Original assignee: 北京握奇数据系统有限公司
Priority date: 2010-12-07
Filing date: 2011-10-08
Publication date: 2012-06-14
Also published as: CN102104186A

Abstract

Disclosed are a sensing antenna and a device with a sensing antenna, wherein a sensing antenna of a new structure is adopted, so as to improve a use range and commonality of the sensing antenna. The sensing antenna comprises an input terminal pair and a spiral coil. Two ends of the spiral coil are connected to a first terminal and a second terminal of the input terminal pair respectively. In the sensing antenna of a new structure provided by the present invention, as the spiral coil is adopted, the sensing antenna can be used in a complex environment comprising a lot of metal components, thereby improving the applicable range of the sensing antenna and the commonality of the sensing antenna.

Description

SENSE ANTENNA AND DEVICE WITH SENSE ANTENNA This application claims priority to Chinese application filed on Dec. 7, 2010, application No. 201010576891.7, entitled "Inductive Antenna and Device with Inductive Antenna" The entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of communications, and in particular, to an inductive antenna and a device with the same. Background technique

The RFID (Radio Frequency Identification) system includes an electronic tag and an electronic tag reader for contactless communication; wherein the electronic tag stores a certain format of electronic data, and the electronic data serves as unique identification information for identifying the electronic tag. If the electronic label can be pasted on the item to be identified as an electronic mark of the item to be identified.

The electronic tag reader and the electronic tag can perform contactless communication according to the agreed communication protocol. The specific communication process can be as follows: The electronic tag reader sends a data read command to the electronic tag; the electronic tag reads the command according to the received data, and reads The electronic data stored in the electronic tag is taken and sent to the electronic tag reader.

At present, the way of contactless communication between electronic tag readers and electronic tags is mainly realized by spatial coupling of alternating magnetic field or magnetic field, radio frequency signal modulation and demodulation technology; electronic tag readers and electronic tags are provided with corresponding Inductive antenna, the structure of the inductive antenna is a planar coil; although the planar coil can realize magnetic field induction, in some application scenarios (such as in a complex environment containing a large number of metal parts), it has certain limitations, such as electronic tags. When the reader is a mobile phone, since the planar antenna is parallel to the battery panel of the mobile phone, according to the principle of generating a magnetic field by the energized coil, the generated magnetic field is perpendicular to the battery panel of the mobile phone, and if the back cover of the mobile phone is made of metal, the plane can be shielded. The magnetic field generated by the coil causes the mobile phone and the electronic tag to be in non-contact communication; therefore, the existing induction antenna has a narrow application range and low versatility due to the use of the planar coil. Summary of the invention

The present invention provides an inductive antenna and a device with an inductive antenna, which can realize the functions that can be realized by the existing inductive antenna, and can also be applied to include, for example, the present invention. In the complex environment of a large number of metal parts, the range and versatility of the sensing antenna are improved.

An inductive antenna includes an input terminal pair and a spiral coil, and both ends of the spiral coil are respectively connected to a first terminal and a second terminal of the input terminal pair.

A device with an inductive antenna includes a main body and an inductive antenna, the inductive antenna includes an input terminal pair; the inductive antenna further includes a spiral coil, and two ends of the spiral coil are respectively connected to the first terminal of the input terminal pair And a second terminal; the first terminal and the second terminal are correspondingly connected to a connection point of the main body for connecting the sensing antenna.

The sensing antenna provided by the embodiment of the present invention includes an input terminal pair and a spiral coil, and two ends of the spiral coil are respectively connected to the first terminal and the second terminal of the input terminal pair. Since the induction coil is arranged as a spiral coil, not only can the function realized by the planar coil be realized, but also the magnetic field generated by the spiral coil is mainly concentrated on the two ends of the spiral coil of the induction antenna, and the magnetic field on both sides of the spiral coil is weak, so该With this kind of inductive antenna, even if a metal object appears in a close range on both sides of the spiral coil, the magnetic field generated by the spiral coil is less affected by the metal object, and can be adapted to a complicated environment containing a large number of metal parts, and therefore, Compared with the sensing antenna provided by the prior art, the sensing antenna provided by the embodiment of the invention has a wider application scenario and is more versatile. DRAWINGS

1A is a schematic structural diagram of an inductive antenna according to an embodiment of the present invention;

FIG. 1B is a second schematic structural diagram of an inductive antenna according to an embodiment of the present invention; FIG.

1C is a third schematic structural diagram of an inductive antenna according to an embodiment of the present invention;

1D is a fourth structural schematic diagram of an inductive antenna according to an embodiment of the present invention;

1E is a schematic structural diagram of an apparatus with an inductive antenna according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of an inductive antenna according to an embodiment of the present invention; 3 is a schematic structural view of a metal track strip line disposed on a flexible medium substrate according to an embodiment of the present invention;

4 is a schematic structural diagram of a sensing antenna disposed on a mobile phone battery board according to an embodiment of the present invention;

Schematic diagram of the structure on the SIM card;

6 is a schematic structural view showing a magnetic field generated in a spiral coil of a mobile phone battery panel according to an embodiment of the present invention;

FIG. 7 is a second schematic view showing the structure of a magnetic coil disposed on a spiral coil of a mobile phone battery board according to an embodiment of the present invention; FIG.

8 is a schematic structural view showing a structure in which a mobile phone battery panel provided with a spiral coil is installed in a mobile phone according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of magnetic field sensing of a mobile phone and an electronic tag provided with a spiral coil according to an embodiment of the present invention. detailed description

In view of the above technical problems existing in the prior art, an embodiment of the present invention provides an inductive antenna and a device with an inductive antenna, which can realize the functions that the existing inductive antenna can achieve, and can also be applied to a large number of In the complex environment of metal parts, the range and versatility of the sensing antenna are improved. The inductive antenna includes an input terminal pair and a spiral coil, and the two ends of the spiral coil are respectively connected to the first terminal and the second terminal of the input terminal pair. The induction antenna with the novel structure provided by the present invention can not only realize the function that the planar coil can realize, but also the magnetic field generated by the spiral coil mainly concentrates on the spiral coil of the induction antenna because the induction coil is arranged as a spiral coil. At both ends, the magnetic field on both sides of the spiral coil is weak. Therefore, even if a metal object appears in a close range on both sides of the spiral coil, the magnetic field generated by the spiral coil is less affected by the metal object. The complex environment of metal parts is also adapted, so the application scenario of this application is more versatile.

1A is a schematic structural diagram of an inductive antenna according to an embodiment of the present invention. The line includes an induction coil 11 , and both ends of the induction coil 11 are respectively connected to the first terminal 121 and the second terminal 122 of the input terminal pair of the induction antenna.

Preferably, the sensing antenna 11 further includes a spiral coil fixing layer on which the spiral coil is fixed. The sensing antenna pinned layer may be an outer surface of a solid geometry or an outer surface of a hollow geometry formed of a film material.

Preferably, the inductive antenna 11 further comprises a magnetic material layer, which may be in the same layer as the spiral coil fixing layer, for example, an outer surface of the hollow geometry that may be formed by the solid geometry or by a film material. A layer of magnetic material is attached, and the spiral coil is fixed on the layer of magnetic material. The magnetic material layer may also be located inside the spiral coil pinned layer, for example, a layer of magnetic material may be attached to the inner surface of the hollow geometry formed of the film material.

According to the above description, preferably, the spiral coil 11 may be: a coil formed by winding a wire around a soft magnetic film column, wherein the soft magnetic film column is a cylinder surrounded by a soft magnetic film; Alternatively, the metal track is line etched or printed on the soft magnetic film column; or the metal track is line etched or printed on the flexible dielectric substrate, and the flexible dielectric substrate is wrapped on the soft magnetic film column. Coil.

Preferably, the flexible dielectric substrate is bonded to the soft magnetic film column by an adhesive.

1B is a schematic structural diagram of a sensing antenna according to an embodiment of the present invention. The sensing antenna 1000 includes a spiral coil 1101 and a spiral coil fixing layer 1100. The spiral coil fixing layer 1100 extends a connecting handle 1200 and a connecting portion. 1300, the spiral coil fixing layer 1100 and the connecting portion 1300 are connected by the connecting handle 1200; the connecting handle 1200 is provided with two wires 1201; the first terminal 1202 and the second terminal 1203 extend through the two wires 1201 to the connecting portion 1300, and Two contacts 1301 are formed on the connecting portion 1300, and the sensing antenna 1000 is connected through the contact 1301 and the antenna connecting device. The antenna connection device may be an electronic tag chip; or may be a C4 and C8 contact of the dual interface telecommunication smart card, and the contact 1301 is connected by a conductive adhesive, soldering, etc.; the antenna connection device may also be an electronic tag reader chip or NFC (Near Field Communication) chip.

1C is a third schematic structural diagram of an inductive antenna according to an embodiment of the present invention, and an inductive antenna 1000 includes a spiral coil 1101 and a spiral coil fixing layer 1100. The spiral coil fixing layer 1100 extends out of a connecting handle 1200 and a connecting portion 1300. The spiral coil fixing layer 1100 and the connecting portion 1300 are connected by a connecting handle 1200; Two wires 1201 are provided; the connecting portion 1300 is provided with an antenna connecting device 1310;

The first terminal 1202 and the second terminal 1203 are connected to the antenna connecting device 1310 via two wires 1201. The antenna connection device 1310 may be a printed circuit board and has two via holes 1302 and 1303 disposed thereon and forming a pad; two wires 1201 are respectively connected to the two via holes 1302 and 1303, and may pass through the via holes on the printed circuit board. The soldering chip or other electronic component is soldered to connect the sensing antenna 1000 to the corresponding antenna connecting device 1310. It is also possible to provide more vias on the printed circuit board so that the chips and contacts of the telecommunications smart card can be placed thereon, ultimately forming a dual interface telecommunications smart card with the inductive antenna.

1D is a fourth schematic structural diagram of an inductive antenna according to an embodiment of the present invention. The inductive antenna 1000 includes a spiral coil 1101 and an input terminal pair. The two ends of the spiral coil 1101 are respectively connected to the first terminal 1202 of the input terminal pair. And the second terminal 1203; the spiral coil fixing layer 1100 is a surface of a geometry (the shape of the geometry is not limited to the columnar body in FIG. 1D), and the first terminal 1202 and the second terminal 1203 form two on the surface of the geometry Contact 1301; The sensing antenna 1000 is connected by the two contacts 1301 and the antenna connecting device.

Preferably, the number of turns of the coil of the spiral coil 151, the cross-sectional area of the coil, and the pitch of the adjacent two coil turns are determined according to the quality factor; preferably, the quality factor ranges from 30 to 40.

The sensing antenna in the embodiment of the present invention may be disposed in a mobile device such as a mobile phone, and connected to an NFC chip disposed on the mobile phone, or connected to an NFC chip disposed on the telecommunication smart card, and the NFC chip may be disposed on the sensing antenna. on.

1E is a schematic structural diagram of an apparatus with an inductive antenna according to an embodiment of the present invention. The apparatus includes a main body 14 and an inductive antenna 13, wherein the inductive antenna 13 includes an input terminal pair and a spiral coil 131, and the spiral Two ends of the coil 131 are respectively connected to the first terminal 132 and the second terminal 133 of the input terminal pair; the first terminal 132 and the second terminal 133 are respectively connected to two connection points of the main body 14 for connecting the antenna, The two connection points are the first connection point 141 and the second Connect to point 142.

Preferably, the inductive antenna 13 may further include a spiral coil fixing layer, the spiral coil being fixed on the spiral coil fixing layer.

Preferably, the inductive antenna 13 further includes a magnetic material layer, the magnetic material layer is the spiral coil fixing layer; or the magnetic material layer is located inside the fixed layer of the spiral coil 131.

Preferably, the fixed layer of the spiral coil 131 extends out of a connecting handle and a connecting portion, the connecting handle connects the fixed layer of the spiral coil and the connecting portion, and the connecting handle is provided with two wires, a terminal and a second terminal extend to the connecting portion through the wire, and two contacts are formed on the connecting portion; the sensing antenna 13 passes through the contact and the body 14 for connection sensing The connection points of the antennas 13 are connected.

Preferably, the fixed layer of the spiral coil 131 is a geometric surface, and the first terminal 132 and the second terminal 133 form two contacts on the surface of the geometric body, and the sensing antenna 15 passes through the contact. It is connected to a connection point of the main body 14 for connecting the sensing antenna 13.

Preferably, the geometry is a battery or an iron or plastic column of the device.

Preferably, the main body 14 includes an antenna interface unit, the spiral coil fixing layer extends a connecting handle and a connecting portion, and the connecting handle connects the spiral coil fixing layer and the connecting portion, and the connecting handle Two wires are disposed on the antenna, and the antenna interface unit is disposed on the connecting portion; the first terminal and the second terminal are connected to the antenna interface unit through the wires.

Preferably, the spiral coil 131 is: a coil formed by winding a wire around a soft magnetic film column; or

The metal track is line etched or printed on the soft magnetic film column; or the metal track is line etched or printed on the flexible dielectric substrate, and the flexible dielectric substrate is wrapped around the soft magnetic film column .

The shape of the induction coil in the embodiment of the present invention may be a cylinder, a prism, or the like, and may be flexibly set according to actual needs, and will not be enumerated here.

The above device may be an electronic tag reader, a contactless card reader, used to brush a city card The Pos (Point Of Sale) machine, supermarket or bookstore is used to brush the product number of the Pos machine, electronic label, ATM (Automated Teller Machine), subway gates and other equipment.

In the embodiment of the present invention, when the device shown in FIG. 1E is an electronic tag reader, it may be a conventional electronic tag reader or an electronic tag reader based on a telecommunication smart card; when reading an electronic tag based on a telecommunication smart card At the time of the device, the two connection points in the main body 14 for connecting the sensing antennas are two connection points on the telecommunication smart card for connecting the antenna, such as the C4 contact and the C8 contact in the telecommunication smart card. Telecom smart cards include SIM cards, UIM cards or USIM cards.

Preferably, the first terminal 132 and the second terminal 133 are respectively connected to the C4 contact and the C8 contact of the telecommunication smart card by means of contacts, shrapnel, soldering or conductive glue bonding.

Preferably, the soft magnetic film column is a soft magnetic film disposed on a mounting surface of the panel of the electronic tag reader and enclosing a cylinder formed by the battery panel; the magnetic field generated by the spiral coil is parallel to the The surface of the battery board; or the soft magnetic film column is a column formed by providing a magnetic plating layer on each mounting surface of the battery board and connecting the magnetic plating layers on the mounting surfaces to each other.

Preferably, the soft magnetic film cylinder and the battery board are bonded by an adhesive.

The following describes an electronic tag as an example. The main body of the electronic tag includes the chip of the electronic tag, and the two connection points for connecting the antenna in the main body are two connection points in the chip for connecting the antenna. The electronic tag includes a chip 15 and a sensing antenna 16, wherein: the sensing antenna 16 includes an input terminal pair and a spiral coil 161, and two ends of the spiral coil 161 are respectively connected to the first terminal 162 and the second terminal 163 of the input terminal pair The first terminal 162 and the second terminal 163 are respectively connected to two connection points in the chip 15 for connecting the sensing antenna 16, and the two connection points are a first connection point 151 and a second connection point 152, respectively.

In the embodiment of the present invention, the device shown in FIG. 1F may be a conventional electronic tag or an electronic tag based on a telecommunication smart card; when it is an electronic tag based on a telecommunication smart card, the electronic tag and the telecommunication smart card share a chip. The telecom smart card includes a SIM card, a UIM card or a USIM card. Wait.

When the electronic tag is an electronic tag based on a telecommunications smart card, the first connection point 151 and the second connection point 152 on the chip 15 for connecting the sensing antenna 16 are the C4 contact and the C8 contact on the telecommunication smart card, respectively.

Preferably, the first terminal 162 and the second terminal 163 are respectively connected to the C4 contact and the C8 contact of the telecommunication smart card by means of contacts, shrapnel, soldering or conductive glue bonding.

For a more detailed and clear description of the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and taking an electronic tag reader as a mobile phone as an example. In this embodiment, the electronic tag reader is a mobile phone, the spiral coil is a metal track strip line etched or printed on the flexible medium substrate, and the flexible medium substrate is wrapped around the soft magnetic film column to form a coil.

Referring to FIG. 2, which is a schematic structural view of a spiral coil disposed on a battery panel of a mobile phone according to an embodiment of the present invention, the spiral coil can be obtained by the following steps:

Step 1. Using the process of manufacturing a printed circuit board, the metal track strips 3 are etched or printed on the flexible dielectric substrate 6. As shown in FIG. 3, the metal track strips respectively form corresponding pairs on the flexible dielectric substrate 6. The joints, such as the docking points in FIG. 3, include: docking points N1, N2, N3, ..., Nn and docking points Ν, Ν2, Ν3, ..., Νη,.

Step 2. The flexible dielectric substrate 6 etched or printed with the metal track strip 3 is uniformly bonded to the magnetic soft magnetic film 7 by a binder.

Step 3, the soft magnetic film 7 is followed by the four mounting faces of the battery panel 8 of the mobile phone (the four mounting faces refer to the four sides except the side where the battery positive and negative contacts are disposed and their opposite sides) The panel 8 is evenly wrapped as shown in FIG.

Step 4, after the soft magnetic film 7 wraps the battery, the metal track strip at the butt joint of the soft magnetic film 7 is welded by a precision welding device (such as an ultrasonic welding machine) to obtain a spiral coil, which will be as shown in FIG. The mating points N1, N2, N3, ..., Nn at the first butt joint of the medium soft magnetic film 7 are respectively welded to the mating points ΝΓ, N2', N3' ..., Nn' at the second butt joint.

Step 5, as shown in FIG. 2, one end of the spiral coil formed by the metal track strip is connected to the second terminal 52 of the input terminal pair of the inductive antenna 10 through a metallized hole (ie, a via) and a metal bridge 4. The other end of the spiral coil is connected to the first terminal 51 of the pair of input terminals.

Step 6. Connect the first terminal 51 and the second terminal 52 of the input terminal pair to the corresponding channels of the telecommunication smart card (such as the dual interface SIM card) of the mobile phone through the contact and the spring piece respectively; for example, the first terminal 51 can be And the second terminal 52 is respectively connected to the C4 contact and the C8 contact of the dual interface SIM card, as shown in FIG.

In the embodiment of the present invention, the first terminal 51 and the second terminal 52 of the input terminal pair are connected to the C4 contact and the C8 contact of the dual interface SIM card in a plurality of ways, such as welding, conductive glue bonding or patch card. The method is connected to the corresponding channel of the dual interface SIM card of the mobile phone; by soldering, the method may include: directly soldering the first terminal 51 and the second terminal 52 to the C4 contact and the C8 contact of the dual interface SIM card; Or, two antenna pads are formed at the pins of the sensing antenna, and corresponding via holes are formed at the two antenna pads; the first terminal 51 and the second terminal 52 are respectively soldered to the dual interface SIM card through the via holes. C4 contacts and C8 contacts.

Referring to FIG. 6 and FIG. 7, respectively, FIG. 6 is a schematic diagram showing the distribution of magnetic lines of a magnetic field generated when the spiral coil provided by the embodiment of the present invention is in close contact with the metal conductor plate. In FIGS. 6 and 7, the direction of the arrow indicates that the magnetic field is The direction of the corresponding position, the thickness of the arrow indicates the strength of the magnetic field at the corresponding position (such as the thickness of the arrow is proportional to the strength of the magnetic field, the thicker the arrow, the greater the strength of the magnetic field, and vice versa, the thinner the arrow, the smaller the strength of the magnetic field) .

8 is a schematic structural view of a battery board 8 of a mobile phone provided with a spiral coil installed in a main body 27 of the mobile phone according to an embodiment of the present invention, and a first terminal 51 of the input terminal pair of the sensing antenna 10 (not shown in FIG. 8) And the second terminal 52 (not shown in FIG. 8) can be respectively connected to the corresponding channel of the dual interface SIM card by means of contacts or shrapnel; the back cover 26 of the battery panel 8 of the mobile phone can be made of metal as well It can be non-metallic.

9 is a schematic structural diagram of magnetic field sensing of a mobile phone and an electronic tag provided with a spiral coil according to an embodiment of the present invention. The sensing antenna 10 is disposed inside the mobile phone and is connected with the electronic tag 30 (the electronic tag 30 includes the medium carrier 31, and the sensing The antenna 32 and the chip 33 and the like perform non-contact communication; the arrow in FIG. 9 indicates the magnetic field generated by the sensing antenna 10 of the mobile phone, and the magnetic field passes through the sensing antenna 32 of the electronic tag 30, thereby realizing the non-contact between the mobile phone and the electronic tag. Contact communication. In the embodiment of the present invention, when the material of the battery board 8 of the mobile phone is metal, since the spiral coil is disposed on the soft magnetic film, the magnetic lines of force generated by the spiral coil pass through the soft magnetic film 7 to form a loop without passing through the metal. The material of the panel 8 is such that the magnetic field generated by the spiral coil does not damage the physical and chemical properties of the panel. Moreover, since the two terminals of the input terminal pair of the induction coil are connected to the corresponding channels of the dual interface SIM card by means of contacts or shrapnel, the insertion and removal of the SIM card is not affected.

The sensing antenna provided by the embodiment of the present invention includes an input terminal pair and a spiral coil, and two ends of the spiral coil are respectively connected to the first terminal and the second terminal of the input terminal pair. Since the induction coil is arranged as a spiral coil, not only can the function realized by the planar coil be realized, but also the magnetic field generated by the spiral coil is mainly concentrated on the two ends of the spiral coil of the induction antenna, and the magnetic field on both sides of the spiral coil is weak, so该Using this kind of inductive antenna, even if a metal object appears in a close range on both sides of the spiral coil, the magnetic field generated by the spiral coil is less affected by the metal object, and is adapted to a complex environment including a large number of metal parts, and therefore, Compared with the sensing antenna provided by the prior art, the sensing antenna provided by the embodiment of the invention has a wider application scenario and is more versatile. Moreover, when the electronic tag reader is a mobile phone e-reader, on the one hand, a soft magnetic film column is arranged on the battery board of the mobile phone, and a spiral coil is arranged on the soft magnetic film column, so that the magnetic field generated by the spiral coil passes through the soft magnetic field. The film column is closed, has no effect on the physical and chemical properties of the metal battery, and does not affect the normal use of the battery; on the other hand, the access terminal of the spiral coil is connected to the SIM of the mobile phone through the contact or shrapnel. The corresponding contacts of the card, thereby facilitating the insertion and removal of the SIM card, does not affect the normal use and detachability of the SIM card. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Claim

An inductive antenna comprising an input terminal pair, further comprising: a spiral coil, the two ends of the spiral coil being respectively connected to the first terminal and the second terminal of the pair of input terminals.

The inductive antenna according to claim 1, wherein the inductive antenna further comprises a spiral coil fixing layer, and the spiral coil is fixed on the spiral coil fixing layer.

The inductive antenna according to claim 2, wherein the inductive antenna further comprises a magnetic material layer, and the magnetic material layer is the spiral coil fixed layer; or

The magnetic material layer is located inside the spiral coil fixed layer.

The inductive antenna according to claim 2 or 3, wherein the spiral coil fixing layer extends a connecting handle and a connecting portion, and the connecting handle connects the spiral coil fixing layer and the connecting portion The connecting handle is provided with two wires, and the first terminal and the second terminal extend through the wire to the connecting portion, and two contacts are formed on the connecting portion.

The inductive antenna according to claim 2 or 3, wherein the spiral coil fixing layer is a surface of a geometry, and the first terminal and the second terminal form two touches on a surface of the geometric body. point.

The inductive antenna according to claim 2 or 3, wherein the spiral coil fixing layer extends a connecting handle and a connecting portion, and the connecting handle connects the spiral coil fixing layer and the connecting portion Two wires are disposed on the connecting handle, and the connecting portion is provided with an antenna connecting device, and the first terminal and the second terminal are connected to the antenna connecting device through the wire.

The inductive antenna according to any one of claims 1 to 3, wherein the number of turns of the coil of the spiral coil, the cross-sectional area of the coil, and the pitch of the adjacent two coil turns are determined according to a quality factor.

The inductive antenna according to claim 7, wherein the quality factor ranges from 30 to 40.

A device with an inductive antenna, comprising a main body and an inductive antenna, the inductive antenna comprising an input terminal pair, wherein the inductive antenna further comprises a spiral coil, and the two ends of the spiral coil are divided The first terminal and the second terminal of the input terminal pair are not connected; the first terminal and the second terminal are correspondingly connected to the main body.

10. The apparatus according to claim 9, wherein the sensing antenna further comprises a spiral coil fixing layer, and the spiral coil is fixed on the spiral coil fixing layer.

The device according to claim 10, wherein the sensing antenna further comprises a magnetic material layer, and the magnetic material layer is the spiral coil fixed layer; or

The magnetic material layer is located inside the spiral coil fixed layer.

The device according to claim 10 or 11, wherein the spiral coil fixing layer extends a connecting handle and a connecting portion, and the connecting handle connects the spiral coil fixing layer and the connecting portion, Two wires are disposed on the connecting handle, and the first terminal and the second terminal extend to the connecting portion through the wire, and two contacts are formed on the connecting portion, and the sensing antenna passes through the The contacts are connected to the body.

The device according to claim 10 or 11, wherein the spiral coil fixing layer is a surface of a geometry, and the first terminal and the second terminal form two contacts on a surface of the geometric body, The inductive antenna is coupled to the body by the contact.

The apparatus according to claim 10 or 11, wherein the main body comprises an antenna interface unit, wherein the spiral coil fixing layer extends a connecting handle and a connecting portion, and the connecting handle connects the spiral coil a fixing layer and the connecting portion, the connecting handle is provided with two wires, the antenna interface unit is disposed on the connecting portion, and the first terminal and the second terminal are connected to the antenna through the wire Unit connection.

15. Apparatus according to claim 13 wherein said geometry is a battery or an iron or plastic column of said apparatus.

The apparatus according to any one of claims 9-11, wherein the number of turns of the coil, the cross-sectional area of the coil, and the pitch of the adjacent two coil turns are determined according to a quality factor.

17. The apparatus according to claim 16, wherein said quality factor has a value range of 30-40 „

The device according to any one of claims 9-11, wherein the device comprises: an electronic tag, an electronic tag reader, an automatic rejector ATM, a sales terminal POS, a subway gate.