CN102299407A - Induction antenna, electronic tag and electronic tag reader-writer - Google Patents
Induction antenna, electronic tag and electronic tag reader-writer Download PDFInfo
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Abstract
The invention discloses an induction antenna, an electronic tag and an electronic tag reader-writer in order to raise non-contact performance of the electronic tag and/or the electronic tag reader-writer, so that a success rate and validity of employing the electronic tag to carry out mobile payment are improved. The electronic tag comprises a chip, and is characterized by also comprising an induction antenna provided with a work coil and a relay coil, wherein the work coil comprises an input terminal pair and a first coil, and the input terminal pair connects with the chip; the relay coil comprises at least one second coil which is in end to end connection to form a closed coil; the relay coil and the induction coil have a preset distance in space, and are in inductive electromagnetic coupling. By employing the electronic tag and the electronic tag reader-writer provided in the invention, non-contact performance of the electronic tag, the electronic tag reader-writer and the induction antenna can be improved.
Description
Technical Field
The invention relates to the field of communication, in particular to an induction antenna, an electronic tag and an electronic tag reader-writer.
Background
At present, in 13.56MHz RFID (Radio Frequency Identification), on-site real-time mobile payment is mainly realized through a mobile phone payment card; the mobile payment card is a multifunctional telecommunication intelligent card, and comprises the following components according to different communication systems: SIM (Subscriber Identity Module) card, UIM (User Identity Module) card, USIM (Universal Subscriber Identity Module), UICC (Universal Integrated circuit card), etc. have two communication interfaces of contact and non-contact, wherein the contact communication interface is mainly used for implementing telecommunication application and completing normal function of mobile phone card, and the non-contact interface can support non-telecommunication application of non-contact mobile payment.
The mobile phone payment card obtains energy and performs data interaction through the induction of an antenna coil of the mobile phone payment card, as shown in figure 1; in fig. 1, when performing communication between the electronic tag reader and the mobile payment card, the electronic tag reader includes a state 1 and a state 2, where the state 1: the electronic tag reader-writer sends data to the mobile phone payment card, and the mobile phone payment card receives the data sent by the electronic tag reader-writer; state 2: the mobile phone payment card sends data to the electronic tag reader-writer, and the electronic tag reader-writer receives the data sent by the mobile phone payment card. The IS0/IEC14443 protocol specifies that the area of the standard ID-1 type non-contact smart card IS 85.6mm multiplied by 53.98mm, the non-contact smart card can normally work under the field intensity of 1.5A/M-7.5A/M, and the subcarrier modulation depth of the non-contact smart card IS more than 22/H0.5(ii) a The receiving sensitivity of the electronic tag reader-writer is less than 18/H0.5. Because the area of the mobile payment card is smaller than the size of the standard ID-1 type non-contact intelligent card and the mobile payment card is influenced by the mobile phone battery, the areas of the batteries adopted by different types of mobile phones are possibly different, and the influence on the reading and writing effect of the mobile payment card is different; aiming at various mobile phones with larger structural difference at present, an effective and universal mode is not provided for reducing the influence of a battery on a mobile phone payment card, so that the problem of poor non-contact performance exists in the mobile payment by adopting the mobile phone payment card at present, namely the problem of low transaction success rate or short transaction distance and the like.
Disclosure of Invention
In view of the above technical problems in the prior art, embodiments of the present invention provide an inductive antenna, an electronic tag, and an electronic tag reader/writer, so as to improve the non-contact performance of the electronic tag and/or the electronic tag reader/writer, thereby improving the success rate and effectiveness of mobile payment using the electronic tag.
An inductive antenna comprising an inductive coil and a relay coil, wherein:
the induction coil comprises a pair of input terminals and a first coil;
the relay coil comprises at least one second coil, and the second coils are connected end to form a closed coil;
the relay coil is spaced apart from the induction coil by a preset distance and is electromagnetically inductively coupled with the induction coil.
The induction antenna provided by the embodiment of the invention is provided with the induction coil and the relay coil, and the relay coil is in electromagnetic induction coupling with the induction coil, so that the relay coil can generate a corresponding magnetic field in the magnetic field generated by the induction coil and is superposed with the magnetic field generated by the induction coil, and the magnetic field generated by the induction coil can be enhanced to a certain extent; therefore, the signals received by the induction coil are signals subjected to enhancement processing by the relay coil, so that the signals received by the induction antenna are ensured to have larger energy, and the interference is reduced; and when the induction coil needs to send signals, the signals to be sent are sent after being enhanced through the relay coil, so that the energy of the signals sent by the induction antenna is improved, and the interference is reduced. Therefore, the induction antenna provided by the embodiment of the invention can improve the quality of signal receiving or signal sending.
An electronic tag comprising a chip, an inductive antenna provided with a work coil and a relay coil, wherein:
the working coil includes a pair of input terminals connected to the chip and a first coil;
the relay coil comprises at least one second coil, and the second coils are connected end to form a closed coil;
the relay coil is spaced apart from the working coil by a preset distance and is electromagnetically inductively coupled with the working coil.
The induction antenna of the electronic tag in the embodiment of the invention is provided with the working coil and the relay coil, and the relay coil is in electromagnetic induction coupling with the working coil, so that the relay coil can generate a corresponding magnetic field in the magnetic field generated by the working coil and is superposed with the magnetic field generated by the working coil, and the magnetic field generated by the working coil can be enhanced to a certain extent; therefore, when the electronic tag receives the signal sent by the electronic tag reader-writer, the relay coil of the electronic tag performs enhancement processing on the signal sent to the electronic tag and then sends the signal to the working coil of the electronic tag, so that the quality of the signal received by the working coil of the electronic tag is improved; in addition, when the electronic tag sends a signal to the electronic tag reader-writer, the signal to be sent is enhanced through the relay coil of the electronic tag and then sent, so that the quality of the signal sent to the electronic tag reader-writer is improved; therefore, the minimum working field intensity required by the normal work of the electronic tag is reduced through the relay coil, the subcarrier modulation depth of the electronic tag is increased, the communication distance between the electronic tag and the electronic tag reader-writer is further increased, and the non-contact performance of the electronic tag is improved.
An electronic tags read write line, includes the body, is provided with work coil and relay coil's induction antenna, wherein:
the work coil includes a pair of input terminals connected to the body and a first coil;
the relay coil comprises at least one second coil, and the second coils are connected end to form a closed coil;
the relay coil is spaced apart from the working coil by a preset distance and is electromagnetically inductively coupled with the working coil.
The induction antenna of the electronic tag reader-writer in the embodiment of the invention is provided with the working coil and the relay coil, and the relay coil is electromagnetically and inductively coupled with the working coil, so that the relay coil can generate a corresponding magnetic field in the magnetic field generated by the working coil and is superposed with the magnetic field generated by the working coil, and the magnetic field generated by the working coil can be enhanced to a certain extent; therefore, when the electronic tag reader-writer receives the signal sent by the electronic tag, the relay coil of the electronic tag reader-writer performs enhancement processing on the received signal and then sends the signal to the working coil of the electronic tag reader-writer, so that the quality of the signal received by the working coil of the electronic tag reader-writer is improved; in addition, when the electronic tag reader-writer sends a signal to the electronic tag, the signal to be sent is enhanced through a relay coil of the electronic tag reader-writer and then sent, so that the quality of the signal sent to the electronic tag is improved; therefore, the relay coil can enhance the signal intensity of the signal received by the working coil of the electronic tag reader-writer, improve the receiving sensitivity of the system, and simultaneously increase the signal intensity sent by the electronic tag reader-writer to the electronic tag, thereby increasing the communication distance between the electronic tag and the electronic tag reader-writer and improving the non-contact performance of the electronic tag reader-writer.
Drawings
FIG. 1 is a schematic diagram of data interaction between an electronic tag and an electronic tag reader/writer in the prior art;
fig. 2 is a schematic structural diagram of an induction antenna according to an embodiment of the present invention;
fig. 3A is a schematic structural diagram of a relay coil using a wound capacitor according to a first embodiment of the present invention;
fig. 3B is a schematic diagram illustrating a positional relationship between the induction coil and the relay coil according to an embodiment of the invention;
fig. 4A is a schematic structural diagram of an electronic tag according to a second embodiment of the present invention;
fig. 4B is a schematic diagram illustrating a positional relationship between the work coil and the relay coil according to the second embodiment of the present invention;
fig. 4C, 4D and 4E are schematic diagrams illustrating a positional relationship among a plurality of second coils according to a second embodiment of the present invention;
fig. 5A, fig. 5B, fig. 5C, fig. 5D, fig. 5E and fig. 5F are schematic structural diagrams of a relay coil disposed on an electronic tag according to a second embodiment of the present invention;
fig. 6 is another schematic structural diagram of the electronic tag according to the second embodiment of the present invention;
fig. 7A is a schematic structural diagram of an electronic tag reader/writer according to a third embodiment of the present invention;
fig. 7B and 7C are schematic diagrams illustrating a positional relationship between the work coil and the relay coil in the third embodiment of the present invention, respectively;
fig. 8 is another schematic structural diagram of an electronic tag reader/writer according to a third embodiment of the present invention;
fig. 9A is a schematic diagram illustrating a state where an electronic tag interacts with an electronic tag reader/writer according to an embodiment of the present invention;
fig. 9B is an equivalent circuit structure diagram of data interaction between the electronic tag and the electronic tag reader/writer in the embodiment of the present invention;
fig. 9C is an equivalent circuit structure diagram of data interaction between an electronic tag and an electronic tag reader/writer in the prior art.
Detailed Description
In view of the above technical problems in the prior art, embodiments of the present invention provide an inductive antenna, an electronic tag, and an electronic tag reader/writer, which can increase a distance between the electronic tag and the electronic tag reader/writer for wireless communication, and improve the performance of the electronic tag and/or the electronic tag reader/writer, thereby improving the success rate and effectiveness of mobile payment through the electronic tag. An inductive antenna comprising an inductive coil and a relay coil, wherein: the induction coil comprises a pair of input terminals and a first coil; the relay coil comprises at least one second coil, and the second coils are connected end to form a closed coil; the relay coil is spaced apart from the induction coil by a preset distance and is electromagnetically inductively coupled with the induction coil. Electronic tags includes the chip, still including being provided with work coil and relay coil's induction antenna, wherein: the working coil includes a pair of input terminals connected to the chip and a first coil; the relay coil comprises at least one second coil, and the second coils are connected end to form a closed coil; the relay coil is spaced apart from the working coil by a preset distance and is electromagnetically inductively coupled with the working coil. Electronic tags read write line, including the body, be provided with work coil and relay coil's induction antenna, wherein: the work coil includes a pair of input terminals connected to the body and a first coil; the relay coil comprises at least one second coil, and the second coils are connected end to form a closed coil; the relay coil is spaced apart from the working coil by a preset distance and is electromagnetically inductively coupled with the working coil.
The technical scheme of the invention is described in detail in the following with reference to the attached drawings of the specification.
Example one
Referring to fig. 2, which is a schematic structural diagram of an induction antenna according to an embodiment of the present invention, the induction antenna may include an induction coil 21 and a relay coil 22, where:
the induction coil 21 includes a pair of input terminals 211 and a first coil 212;
the relay coil 22 comprises at least one second coil 221, and the second coils 221 are connected end to form a closed coil;
the relay coil 22 is spatially separated from the induction coil 21 by a predetermined distance, and is electromagnetically inductively coupled with the induction coil 21. The preset distance between the relay coil 22 and the induction coil 21 in space is specifically as follows: the minimum distance between the relay coil 22 and the induction coil 21 is only required to ensure that the relay coil 22 and the induction coil 21 are not in contact with each other, and the maximum distance between the relay coil 22 and the induction coil 21 is only required to ensure that the relay coil 22 is positioned in the magnetic field generated by the induction coil 21.
When the induction coil 21 is operated, the relay coil 22 is located in a first electromagnetic field generated by the induction coil 21, and the relay coil 22 generates a second electromagnetic field, wherein the first electromagnetic field and the second electromagnetic field are superposed together.
The induction coil 21 is used for receiving signals or sending signals through the relay coil 22; the relay coil 22 is used for outputting the signals to be received by the induction coil 21 to the induction coil 21 after pre-receiving, adjusting and enhancing the signals; and for copying, adjusting and enhancing the signal output by the induction coil 21.
Preferably, the induction coil 21 further includes a first capacitor 213, and the first capacitor 213 is connected in parallel to two ends of the input terminal pair 211; and/or the second coil 221 comprises a second capacitor 222, the second capacitor 222 and the second coil 221 are connected in series to form a closed loop, wherein a first terminal and a second terminal of the second coil 221 are connected to the second capacitor 222 to form an equivalent resonant circuit. The second coil 221 may be provided as a coil in the form of a printed circuit board or a coil in the form of a wire winding; the second capacitor 222 may be a parallel plate capacitor, a standard capacitor device, or a wire wound capacitor, as shown in fig. 3A, and the capacitor 222 is a wire wound capacitor.
An insulating isolation layer may be disposed between the induction coil 21 and the relay coil 22, as shown in fig. 3B; the induction coil 21 and the relay coil 22 may be provided on the front and back surfaces of the same base material.
The shape of the second coil 221 of the relay coil 22 may be rectangular, circular, elliptical or other geometric shapes, and may be flexibly set according to actual needs.
The induction antenna provided in the first embodiment Of the present invention may be applied to an electronic tag, such as a mobile payment card (including a SIM card, a User Identity Module (UIM) card or a Universal Subscriber Identity Module (USIM) card), and may also be applied to an electronic tag reader/writer, such as a bus-mounted device for swiping city one-card traffic, a Point Of Sale (Point Of Sale) machine for small amount Of consumption, a subway gate, and the like.
In the embodiment of the present invention, the induction coil 21 and the relay coil 22 may be disposed on the same plane, or may be disposed on different planes, for example, in practical application, if the induction coil 21 is disposed on an inner side panel of the mobile phone rear cover, the relay coil 22 may be disposed on the inner side panel of the mobile phone rear cover, or may be disposed on an outer side panel of the mobile phone rear cover corresponding to the inner side panel.
The induction antenna provided by the first embodiment of the invention is provided with the induction coil and the relay coil, and the relay coil is electromagnetically and inductively coupled with the induction coil, so that the relay coil can generate a corresponding magnetic field in a magnetic field generated by the induction coil and is superposed with the magnetic field generated by the induction coil, and the magnetic field generated by the induction coil can be enhanced to a certain extent; therefore, the signal received by the induction coil is the signal enhanced by the relay coil, so that the energy of the signal received by the induction antenna is ensured to be larger, and the interference is reduced; and when the induction coil needs to send signals, the signals to be sent are enhanced through the relay coil and then sent, so that the energy of the signals sent by the induction antenna is improved, and the interference is reduced. Therefore, the induction antenna provided by the embodiment of the invention can improve the quality of signal receiving or transmitting.
Example two
Referring to fig. 4A, which is a schematic structural diagram of an electronic tag according to a second embodiment of the present invention, the electronic tag includes a chip 40 and an induction antenna, where the induction antenna includes: a work coil 41 and a relay coil 42, wherein:
the operating coil 41 includes a pair of input terminals 411 and a first coil 412, the pair of input terminals 411 being connected to the chip 40;
the relay coil 42 comprises at least one second coil 421, and the second coils 421 are connected end to form a closed coil;
the relay coil 42 is spatially separated from the work coil 41 by a predetermined distance, and is electromagnetically inductively coupled to the work coil 41. In the second embodiment of the present invention, the distance between the relay coil 42 and the working coil 41 in space is specifically: the minimum distance between the relay coil 42 and the operating coil 41 is only required to ensure that the relay coil 42 and the operating coil 41 are not in contact with each other, and the maximum distance between the relay coil 42 and the operating coil 41 is only required to ensure that the relay coil 42 is positioned in the magnetic field generated by the operating coil 41.
The work coil 41 is used for receiving a signal sent by the electronic tag reader through the relay coil 42 and sending a signal to the electronic tag reader through the relay coil 42; the relay coil 42 is configured to perform pre-receiving, adjusting, and enhancing processing on a signal sent by the electronic tag reader to obtain a first signal, and send the first signal to the work coil 41; and the relay coil 42 is configured to copy, adjust, and enhance the signal output by the work coil 41 to obtain a second signal, and send the second signal to the electronic tag reader.
Preferably, in the second embodiment of the present invention, the structure of the sensing antenna may be the same as that of the sensing antenna in the first embodiment. If the working coil 41 further comprises a first capacitor 413, said first capacitor 413 is connected in parallel to both ends of said input terminal pair 411; and/or the second coil 421 comprises a second capacitor 422, and the second capacitor 422 and the second coil 421 are connected in series to form a closed loop.
Preferably, the electronic tag further comprises a substrate 43, wherein the substrate 43 comprises a first layer and a second layer, the chip 40 and the work coil 41 are disposed on the first layer, and the relay coil 42 is disposed on the second layer, as shown in fig. 4B; when the working coil 41 is in operation, the relay coil 42 is located in a first electromagnetic field generated by the working coil 41, and the relay coil 42 generates a second electromagnetic field, and the first electromagnetic field and the second electromagnetic field are superposed together. Specifically, when the electronic tag is located in the magnetic field generated by the electronic tag reader/writer, the relay coil 42 generates a magnetic field which is superposed with the magnetic field generated by the electronic tag reader/writer, so that the energy generated in the working coil 41 is increased, and the reading/writing distance is increased.
Preferably, when the relay coil 42 includes a plurality of second coils 421, the plurality of second coils 421 are disposed on the same plane, as shown in fig. 4C; alternatively, the plurality of second coils 421 are disposed on different planes, and two of the plurality of second coils 421 are spaced apart from each other by a predetermined distance, and two adjacent second coils 421 are separated by an insulating layer, as shown in fig. 4D; alternatively, part of the second coils 421 are arranged on the same plane, and the second coils 421 on different planes are spatially separated by a preset distance, as shown in fig. 4E.
Preferably, in the second embodiment of the present invention, the relay coil 42 is disposed on the second layer of the substrate 43 by means of pasting, as shown in fig. 5A, 5B, 5C, 5D, 5E and 5F, the relay coil 42 is pasted on the second layer of the substrate 43 in a positive transverse direction, a positive vertical direction, a downward bias, a positive transverse direction and a vertical bias, respectively.
In the second embodiment of the present invention, the schematic structural diagram of the antenna portion where the relay coil 42 and the work coil 41 are disposed on the electronic tag is not limited to fig. 4A, and may also be as shown in fig. 6.
In the second embodiment of the present invention, the material of the relay coil 42 may be the same as the material of the antenna of the electronic tag.
The shape of the relay coil 42 may be rectangular, circular, oval or other common geometric shapes, and can be flexibly set according to actual needs.
Taking the electronic tag as a mobile payment card as an example for explanation, the mobile payment card is provided with a relay coil 42 and a working coil 41; the relay coil 42 and the working coil 41 in the mobile phone payment card can both comprise a coil and a capacitor, and two connection terminals 411 of the working coil 41 are respectively connected with a C4 contact and a C8 contact in the mobile phone payment card.
The electronic tag is provided with the relay coil, and the relay coil is in electromagnetic induction coupling with the working coil, so that the relay coil can generate a corresponding magnetic field in the magnetic field generated by the working coil and is superposed with the magnetic field generated by the working coil, and the magnetic field generated by the working coil can be enhanced to a certain extent; therefore, when the electronic tag receives the signal sent by the electronic tag reader-writer, the relay coil of the electronic tag strengthens the signal sent to the electronic tag and then sends the signal to the working coil of the electronic tag, so that the quality of the signal received by the working coil of the electronic tag is ensured; in addition, when the electronic tag sends a signal to the electronic tag reader-writer, the signal is enhanced by the relay coil of the electronic tag and then sent, so that the quality of the signal sent by the electronic tag to the electronic tag reader-writer is improved; therefore, through the relay coil, the minimum working field intensity required by the normal work of the electronic tag is reduced, the subcarrier modulation depth of the electronic tag is increased, the communication distance between the electronic tag and the electronic tag reader-writer is increased, and the non-contact performance of the electronic tag is improved.
EXAMPLE III
Referring to fig. 7A, which is a schematic structural diagram of an electronic tag reader in the third embodiment of the present invention, the electronic tag reader may include a body 70, and an induction antenna provided with a work coil 71 and a relay coil 72, where:
the working coil 71 includes a pair of input terminals 711 and a first coil 712, the pair of input terminals 711 being connected to the body 70;
the relay coil 72 includes at least one second coil 721, and the second coils 721 are connected end to form a closed coil.
The work coil 71 is used for receiving the signal sent by the electronic tag through the relay coil 72 and sending the signal to the electronic tag through the relay coil 72; the relay coil 72 is used for performing pre-receiving, adjusting and enhancing processing on the signal sent by the electronic tag to obtain a first signal, and sending the first signal to the working coil; and the relay coil 72 is configured to copy, adjust, and enhance the signal output by the working coil to obtain a second signal, and send the second signal to the electronic tag.
Preferably, the working coil 71 further includes a first capacitor 713, and the first capacitor 713 is connected in parallel to two ends of the input terminal pair 711; and/or the second coil 721 comprises a second capacitor 722, the second capacitor 722 and the second coil 721 are connected in series to form a closed loop. A first terminal and a second terminal of the second coil 721 are connected to the second capacitor 722 to form a resonant circuit.
The relay coil 72 is disposed in front of the working coil 71 (the front is as shown in fig. 7B, the relay coil 72 is disposed on an inner side surface of a housing induction area 73 of the electronic tag reader/writer, or the front is as shown in fig. 7C, the relay coil 72 is disposed on an outer side surface of the housing induction area 73 of the electronic tag reader/writer, wherein the housing induction area 73 is an area for inducing an electronic tag in a housing of the electronic tag reader/writer), and the relay coil 72 is spatially separated from the working coil 71 by a predetermined distance and electromagnetically inductively coupled with the working coil 71.
When the working coil 71 is in operation, the relay coil 72 is located in a first electromagnetic field generated by the working coil 71, and the relay coil 72 generates a second electromagnetic field, wherein the first electromagnetic field and the second electromagnetic field are superposed together. Specifically, when the electronic tag is located in the magnetic field generated by the electronic tag reader/writer, the relay coil 72 generates a magnetic field which is superposed with the magnetic field generated by the electronic tag, so that the energy generated in the working coil 71 is increased, and the reading/writing distance is increased.
Preferably, when the relay coil 72 includes a plurality of second coils 721, the plurality of second coils 721 are disposed on the same plane; or, the plurality of second coils 721 are disposed on different planes, and a preset distance is spatially between every two second coils 721; alternatively, some of the second coils 721 are arranged on the same plane, and the second coils 721 on different planes are spatially separated by a predetermined distance, as shown in fig. 4C and 4D and 4E, respectively.
The second coil 721 is disposed on the case sensing area 73 of the electronic tag reader in the form of a printed circuit board, or the second coil 721 is disposed on the case sensing area 73 of the electronic tag reader in the form of a winding; and/or the second capacitor 722 is a parallel plate capacitor, a capacitor device, or a wound capacitor.
The relay coil 72 may be attached to the housing sensing area 73 of the electronic tag reader as shown in fig. 5A, 5B, 5C, 5D, 5E, and 5F, which is not described herein again. The structure in which the relay coil 72 and the operating coil 71 are provided in the electronic tag reader/writer is not limited to fig. 7A, and may be provided as shown in fig. 8.
In the third embodiment of the present invention, the coil 721 of the relay coil 72 may be rectangular, circular, elliptical or other common geometric shapes, and can be flexibly configured according to actual needs.
In the embodiment of the invention, the relay coil can be arranged in the electronic tag only, or in the electronic tag reader-writer only, or in both the electronic tag and the electronic tag reader-writer. To describe the principle of the present invention in detail, an example in which only the electronic tag is provided with the relay coil will be described. As shown in fig. 9A, the schematic structural diagram of data interaction between an electronic tag and an electronic tag reader-writer is shown, where the electronic tag reader-writer and the electronic tag include four states in a communication process, which are a state 91, a state 92, a state 93, and a state 94, where the state 91 is: the electronic tag reader-writer sends a first signal to a relay coil of the electronic tag; state 92: the relay coil performs pre-receiving, adjusting and enhancing processing on the first signal to obtain a second signal, and sends the second signal to a working coil of the electronic tag; state 93: when a working coil of the electronic tag needs to send a signal to an electronic tag reader-writer, sending a third signal to a relay coil of the electronic tag; state 94: and the relay coil of the electronic tag copies, adjusts and enhances the third signal to obtain a fourth signal, and sends the fourth signal to the electronic tag reader-writer. The equivalent circuit of the relay coil of the electronic tag in fig. 9A for processing signals can be seen in fig. 9B; now, taking fig. 9B as an example that the relay coil processes the first signal sent by the electronic tag reader/writer to obtain a second signal, and sends the second signal to the work coil of the electronic tag, the energy obtained by the work coil of the electronic tag may be as shown in the following formula (1):
formula (1);
the voltage of the working coil can be obtained according to the formula (1) as shown in the formula (2):
in the formula (1), the reaction mixture is,
energy obtained for the working coil of the electronic tag, M23Is the mutual inductance coefficient between the relay coil and the working coil of the electronic tag, M21Is the mutual inductance coefficient between the working coil of the electronic tag and the working coil of the electronic tag reader-writer, M31Is the mutual inductance coefficient between the work coil of the electronic tag reader-writer and the relay coil of the electronic tag i3Induced current of relay coil for electronic tag, i1The current of a working coil of the electronic tag reader-writer is obtained; in the formula (2), U2Is the induced voltage of the working coil of the electronic label.
Taking the above example as an example, in the prior art, because the electronic tag is not provided with the relay coil, as shown in fig. 9C, in the data interaction process between the electronic tag and the electronic tag reader/writer, energy obtained by the working coil of the electronic tag may be as shown in formula (3):
The voltage of the working coil of the electronic tag can be obtained according to the formula (3) as shown in the formula (4):
In the formula (3), the reaction mixture is,
energy taken for the working coil of the electronic tag, M21Is the mutual inductance coefficient between the working coil of the electronic tag and the working coil of the electronic tag reader-writer, i1The current of a working coil of the electronic tag reader-writer is obtained; in formula (4), U'2Is the induced voltage of the working coil of the electronic label.
As is clear from comparison of the above formulae (1) and (3), the compounds
In the case that the size of the working coil of the electronic tag is fixedUnder the condition, the size of the relay coil of the electronic tag and the relative position of the relay coil of the electronic tag and the working coil of the electronic tag reader-writer can be adjusted, and other parameters can be adjusted, so that M is enabled to be in a stable state23＞M31I.e. by
Therefore, the relay coil used in the electronic tag can increase the intensity of the induced voltage of the working coil in the electronic tag, and further reduce the minimum working field intensity required by the normal work of the electronic tag; similarly, the strength of the signal sent by the electronic tag can be increased (namely, the subcarrier modulation depth is increased); in addition, the electronic tag relay coil can be adjusted to have a high quality factor (Q value), and when the Q value is high, i in the formula (1)3The magnetic field strength of the electronic tag is enhanced, and the strength of signals received by the electronic tag working coil is further improved. Similarly, when the relay coil is arranged in the electronic tag reader, the relay coil can enhance the strength of the signal transmitted by the electronic tag reader and the receiving sensitivity of the electronic tag reader.
In the embodiment of the present invention, the working coil 71 and the relay coil 72 may be disposed on the same plane, or may be disposed on different planes, for example, in practical application, the working coil 71 and the relay coil 72 are respectively disposed on two opposite surfaces of the main body of the electronic tag reader/writer.
In the third embodiment of the present invention, the distance between the relay coil 72 and the working coil 71 in space is specifically: the minimum distance between the relay coil 72 and the operating coil 71 is only required to ensure that the relay coil 72 and the operating coil 71 are not in contact with each other, and the maximum distance between the relay coil 72 and the operating coil 71 is only required to ensure that the relay coil 72 is positioned in the magnetic field generated by the operating coil 71.
The electronic tag reader-writer provided by the embodiment of the invention is provided with the relay coil, and the relay coil is in electromagnetic induction coupling with the working coil, so that the relay coil can generate a corresponding magnetic field in the magnetic field generated by the working coil and is superposed with the magnetic field generated by the working coil, and the magnetic field generated by the working coil can be enhanced to a certain extent; in addition, when the electronic tag reader-writer sends a signal to the electronic tag, the signal to be sent is enhanced through a relay coil of the electronic tag reader-writer and then sent, so that the quality of the signal sent to the electronic tag is ensured; therefore, the distance for communication between the electronic tag and the electronic tag reader-writer is increased through the relay coil, and the minimum working field intensity required by the normal work of the working coil of the electronic tag reader-writer is reduced, so that the non-contact performance of the electronic tag reader-writer is improved.
In the embodiment of the present invention, the working coils in the electronic tag and the electronic tag reader/writer are substantially similar to or the same as the induction coil in the induction antenna in the first embodiment.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. An inductive antenna, comprising an inductive coil and a relay coil, wherein:
the induction coil comprises a pair of input terminals and a first coil;
the relay coil comprises at least one second coil, and the second coils are connected end to form a closed coil;
the relay coil is spaced apart from the induction coil by a preset distance and is electromagnetically inductively coupled with the induction coil.
2. The inductive antenna of claim 1,
the induction coil further comprises a first capacitor, and the first capacitor is connected in parallel to two ends of the input terminal pair; and/or
The second coil comprises a second capacitor, and the second capacitor and the second coil are connected in series to form a closed loop.
3. The inductive antenna of claim 1, wherein said repeater coil is positioned in a first electromagnetic field generated by said inductive coil when said inductive coil is in operation, said repeater coil generating a second electromagnetic field, said first electromagnetic field and said second electromagnetic field being superimposed.
4. The induction antenna as claimed in claim 1, wherein when said relay coil includes a plurality of second coils, said plurality of second coils are disposed on the same plane; or,
the plurality of second coils are arranged on different planes, and a preset distance is formed between every two second coils in space; or,
and part of the second coils are arranged on the same plane, and the second coils on different planes are spaced apart from each other by a preset distance.
5. The utility model provides an electronic tags, includes the chip, its characterized in that still includes the induction antenna who is provided with work coil and relay coil, wherein:
the working coil includes a pair of input terminals connected to the chip and a first coil;
the relay coil comprises at least one second coil, and the second coils are connected end to form a closed coil;
the relay coil is spaced apart from the working coil by a preset distance and is electromagnetically inductively coupled with the working coil.
6. The electronic tag according to claim 5, wherein said operating coil further comprises a first capacitor connected in parallel across said pair of input terminals; and/or
The second coil comprises a second capacitor, and the second capacitor and the second coil are connected in series to form a closed loop.
7. The electronic tag according to claim 5, wherein the electronic tag further comprises a substrate comprising a first layer and a second layer, the chip and the work coil being disposed in the first layer, and the relay coil being disposed in the second layer.
8. The electronic tag according to claim 7, wherein when the relay coil includes a plurality of second coils, the plurality of second coils are disposed on the same plane; or,
the plurality of second coils are arranged on different planes, and a preset distance is formed between every two second coils in space; or,
and part of the second coils are arranged on the same plane, and the second coils on different planes are spaced apart from each other by a preset distance.
9. The utility model provides an electronic tags read write line, includes the body, its characterized in that still includes the induction antenna who is provided with work coil and relay coil, wherein:
the work coil includes a pair of input terminals connected to the body and a first coil;
the relay coil comprises at least one second coil, and the second coils are connected end to form a closed coil;
the relay coil is spaced apart from the working coil by a preset distance and is electromagnetically inductively coupled with the working coil.
10. The electronic tag reader-writer according to claim 9, wherein said operating coil further comprises a first capacitor connected in parallel across said pair of input terminals; and/or
The second coil comprises a second capacitor, and the second capacitor and the second coil are connected in series to form a closed loop.
11. The electronic tag reader-writer according to claim 9, wherein when said operating coil is operated, said relay coil is positioned in a first electromagnetic field generated by said operating coil, said relay coil generates a second electromagnetic field, and said first electromagnetic field and said second electromagnetic field are superimposed.
12. The electronic tag reader/writer according to claim 11, wherein when the relay coil includes a plurality of second coils, the plurality of second coils are arranged on the same plane; or,
the plurality of second coils are arranged on different planes, and a preset distance is formed between every two second coils in space; or,
and part of the second coils are arranged on the same plane, and the second coils on different planes are spaced apart from each other by a preset distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101643739A CN102299407A (en) | 2011-06-17 | 2011-06-17 | Induction antenna, electronic tag and electronic tag reader-writer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101643739A CN102299407A (en) | 2011-06-17 | 2011-06-17 | Induction antenna, electronic tag and electronic tag reader-writer |
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| CN102299407A true CN102299407A (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101643739A Pending CN102299407A (en) | 2011-06-17 | 2011-06-17 | Induction antenna, electronic tag and electronic tag reader-writer |
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| CN (1) | CN102299407A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103679931A (en) * | 2012-09-07 | 2014-03-26 | 中国移动通信集团贵州有限公司 | A radio frequency signal transmission circuit, contactless payment terminal and payment method |
| CN105225106A (en) * | 2015-09-18 | 2016-01-06 | 萨摩亚商·繁星科技有限公司 | Electronic transaction payment system and induction payment mechanism, networking transaction system |
| WO2016049847A1 (en) * | 2014-09-30 | 2016-04-07 | Hong Kong R&D Centre for Logistics and Supply Chain Management Enabling Technologies Limited | Near field communication (nfc) tag |
| CN111541038A (en) * | 2020-04-29 | 2020-08-14 | 维沃移动通信有限公司 | Circuit structure, electronic device and method for enhancing magnetic field strength of NFC antenna |
| WO2023179364A1 (en) * | 2022-03-22 | 2023-09-28 | 汉朔科技股份有限公司 | Electronic price tag |
| WO2023207905A1 (en) * | 2022-04-28 | 2023-11-02 | 维沃移动通信有限公司 | Antenna, electronic device, and communication method |
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| CN101335377A (en) * | 2008-08-06 | 2008-12-31 | 厦门大学 | Inductance Adjustable Planar Antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101335377A (en) * | 2008-08-06 | 2008-12-31 | 厦门大学 | Inductance Adjustable Planar Antenna |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103679931A (en) * | 2012-09-07 | 2014-03-26 | 中国移动通信集团贵州有限公司 | A radio frequency signal transmission circuit, contactless payment terminal and payment method |
| WO2016049847A1 (en) * | 2014-09-30 | 2016-04-07 | Hong Kong R&D Centre for Logistics and Supply Chain Management Enabling Technologies Limited | Near field communication (nfc) tag |
| CN107408762A (en) * | 2014-09-30 | 2017-11-28 | 香港物流及供应链管理应用技术研发中心 | Near field communication (NFC) tag |
| US10847886B2 (en) | 2014-09-30 | 2020-11-24 | Hong Kong R&D Centre For Logistics And Supply Chai | Near field communication (NFC) tag |
| CN105225106A (en) * | 2015-09-18 | 2016-01-06 | 萨摩亚商·繁星科技有限公司 | Electronic transaction payment system and induction payment mechanism, networking transaction system |
| CN111541038A (en) * | 2020-04-29 | 2020-08-14 | 维沃移动通信有限公司 | Circuit structure, electronic device and method for enhancing magnetic field strength of NFC antenna |
| WO2023179364A1 (en) * | 2022-03-22 | 2023-09-28 | 汉朔科技股份有限公司 | Electronic price tag |
| WO2023207905A1 (en) * | 2022-04-28 | 2023-11-02 | 维沃移动通信有限公司 | Antenna, electronic device, and communication method |
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Application publication date: 20111228 |