JP3834033B2 - Wireless card - Google Patents

Description

  The present invention, for example, performs wireless transmission / reception between a portable battery-free wireless card having a wireless communication function and a wireless card reader / writer (communication device), so that the wireless card reader / writer can communicate with the wireless card. The present invention relates to a battery-less wireless card used in a wireless communication system that transmits power and transmits and receives data to and from a wireless card and transmits and receives data to and from a wireless card reader / writer.

  Recently, a wireless card composed of an IC card in the shape of a rectangular card with a size similar to that of a business card has been developed. By holding the wireless card in front of the wireless card reader / writer, the wireless card reader / writer can be contacted without contact. There is a wireless communication system that transmits and receives data and the like by performing transmission and reception. This wireless card is equipped with a control means (CPU) including a storage element such as a semiconductor memory. By storing appropriate data in the storage element, an ID card (personal identification card), a commuter pass, etc. Can be used.

  Some conventional wireless cards are equipped with a battery that serves as an operating power supply for the circuit elements to be mounted. However, the battery life, the cost for battery replacement, and the like have been problems.

  Therefore, a technology has been proposed in which a radio card receives radio waves transmitted from a radio card reader / writer without mounting a battery on the radio card, and rectifies the received radio waves to obtain DC power for operating power. Yes. One method is to modulate a power wave for power transmission with a data signal from a wireless card reader / writer and transmit power and data to the wireless card with one frequency signal, respectively. Another method is to transmit power and data from the wireless card reader / writer to the wireless card using two frequency signals, a power wave for power transmission and a data wave for data transmission at a different frequency. To be sent.

  In the method using one frequency signal obtained by modulating a power wave with a data signal, the demodulation of the data signal on the wireless card side is relatively simple. However, when a plurality of wireless communication systems using the same frequency are provided close to each other, for example, when a wireless card is used as a commuter pass and a plurality of ticket gate devices for performing ticket gates are provided in parallel, There is a problem that it is easily affected by power waves from other ticket gates in the vicinity and measures such as shielding are required.

  Further, in the method of transmitting the power wave and the data wave at different frequencies, the power wave is much larger than the data wave (for example, power of 10 7 times), and the data wave is transmitted on the wireless card side. The antenna that receives the signal receives a signal in which a weak power data wave is superimposed on a high power power wave.

  However, there is no practical technique for extracting data waves from power waves. In order to extract the data wave, one using a coil element can be easily considered. However, the coil element has a large shape and is not suitable as an element mounted on a wireless card.

  Also, a coil element is not suitable for making a circuit mounted on a wireless card into a one-chip IC (integrated circuit). Furthermore, conventionally, as a response wave from a wireless card to a wireless card reader / writer, it is common to use a high frequency obtained by multiplying the first frequency of the power wave, and a countermeasure against unwanted radiation by a multiplier circuit is required. I was trying.

  Also, in the method of transmitting power waves and data waves at different frequencies from the wireless card reader / writer, the wireless card has sufficient space for arranging antennas for receiving the power waves and data waves respectively. There was a problem that it could not be obtained.

  The power wave is transmitted from the wireless card reader / writer with an extremely large power compared to the data wave. However, in order to secure a sufficient operating power capacity with the wireless card, the power wave must be received efficiently. Not only that, the outer diameter of the power wave antenna required for the wireless card becomes large, and its arrangement is difficult.

  Therefore, the present invention reduces the possibility that the power wave antenna and the data wave antenna are covered with fingers of the hand holding the card when the card is held over the communication device. An object of the present invention is to provide a wireless card that is in a similar reception state and enables reliable transmission and reception.

The wireless card of the present invention includes a first coil that forms a power wave antenna that receives a power wave of a first frequency transmitted from an external communication device, and a second frequency different from the first frequency. A wireless card comprising a second coil for forming a data wave antenna for transmitting and receiving a data wave , wherein the plane of a rectangular card-like substrate formed of a member that transmits radio waves is shortened. It is arranged along the outer periphery of the section obtained by removing at least one of the long side sections when it is divided into three strips on the side, and the second coil is the first coil. It is characterized by being arranged substantially concentrically so as to be doubled inside the enclosed area .

  According to the wireless card of the present invention, the first coil that forms the power wave antenna that receives the power wave and the second coil that forms the data wave antenna that receives the data wave are formed in the center of the card. Is arranged in a double ring so that the first coil and the second coil are less likely to be covered with a finger or the like holding the card when the card is held over the communication device. The first coil and the second coil have substantially the same reception status, and the reception status of both coils is not significantly different.

  Further, according to the wireless card of the present invention, the first coil and the second coil are formed into flat rectangles and arranged in the central section divided into three at the short side of the card, thereby There is no possibility that the first coil and the second coil are covered with a finger or the like to be held.

  In addition, according to the wireless card of the present invention, by arranging the second coil on the inner side surrounded by the first coil on the same plane of the substrate, the power wave can be received more efficiently. The capacity of the operating power supply can be increased, and the operation can be performed reliably.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration of a wireless communication system to which a wireless card according to the present embodiment is applied. The wireless communication system includes a wireless card reader / writer 10 and a wireless card 20 as communication devices that perform contactless communication. From the wireless card reader / writer 10, the power wave f 1 of the first frequency with a large electric power which is not modulated continuously, and the second frequency lower than the first frequency with a weak power ASK-modulated by the data signal. Are transmitted to the radio card 20 via the power wave antenna 11 and the data wave antenna 12, respectively.

  Here, the first frequency of the power wave f1 is, for example, 13.56 MHz, and the second frequency of the data wave f2 is, for example, 3.39 MHz obtained by dividing the first frequency by 1/4. The power wave f1 is transmitted with a power of 10 7 times that of the data wave f2, for example.

  The radio card 20 includes a power wave antenna 21 including a parallel circuit of a first coil L1 and a first capacitor C1, a power generation rectifier circuit 22, a frequency divider circuit 23, a second coil L2, and a second coil L2. It is constituted by a data wave antenna 24, a transmission / reception changeover switch 25, a demodulation circuit 26, a modulation circuit 27, and a CPU (Central Processing Unit) 28 as control means, which are composed of a parallel circuit with a capacitor C2.

  That is, in the wireless card 20, the power wave f1 received by the power wave antenna 21 is rectified by the rectifier circuit 22 to become a DC voltage, which is used as the operating power supply + B. Further, a part of the power wave f1 received by the power wave antenna 21 is sent to the frequency dividing circuit 23, where, for example, a second frequency is generated as a frequency-divided signal divided by 1/4. And sent to the modulation circuit 27.

  A response signal for the wireless card reader / writer 10 is input from the CPU 28 to the modulation circuit 27, and the second frequency ASK modulated by this response signal is sent to the transmission / reception changeover switch 25 as a response wave f3 as shown in FIG. . Further, an input signal including a data wave received by the data wave antenna 24 is sent to the demodulation circuit 26 via the transmission / reception selector switch 25, and the data wave is appropriately extracted, and the waveform is shaped and demodulated as a data signal. And sent to the CPU 28.

  The data wave antenna 24 is an LC resonance circuit. By setting the resonance frequency to the second frequency of the data wave f2, the reception of the power wave f1 is suppressed compared to the reception of the data wave f2. However, since the Q characteristic of the antenna is not steep, it is not sufficient to extract only the data wave f2.

  The transmission / reception changeover switch 25 receives the transmission / reception changeover signal from the CPU 28, thereby transmitting the input from the data wave antenna 24 to the demodulation circuit 26 or the modulated response wave from the modulation circuit 27. In order to transmit f3 to the wireless card reader / writer 10 from the data wave antenna 24, switching is appropriately controlled.

  The demodulation circuit 26 includes, for example, an extraction circuit 26a that extracts a received data wave, and a shaping circuit 26b that shapes the extracted data wave signal and demodulates and outputs the data signal.

  The circuit member of the wireless card 20 is a one-chip IC 29 except for the first coil L1 that forms the power wave antenna 21 and the second coil L2 that forms the data wave antenna 24. .

  FIG. 2 shows the configuration of the extraction circuit 26a in the demodulation circuit 26 in detail. That is, the data wave signal from the data wave antenna 24 is input to the input end 31. The input terminal 31 is connected to the base of the NPN transistor T1 of the first amplifier circuit 32 via a DC blocking capacitor C3. The collector of the transistor T1 is connected to the operating power supply + B through a parallel circuit of a collector resistor R1 and a collector capacitor C4. The emitter of the transistor T1 is grounded via a parallel circuit of an emitter resistor R2 and an emitter capacitor C5. The collector and base of the transistor T1 are connected via the bias resistor R3, and the collector of the transistor T1 is connected to the base of the NPN transistor T2 of the second amplifier circuit 33 via the DC blocking capacitor C6. .

  The collector of the transistor T2 is connected to the operating power supply + B through a parallel circuit of a collector resistor R4 and a collector capacitor C7, and the emitter of the transistor T2 is grounded. The collector and base of the transistor T2 are connected via a bias resistor R5, and the base of the transistor T2 is grounded via a bias resistor R6. The collector of the transistor T2 is connected to the base of the NPN transistor T3 of the third amplifier circuit 34 via the DC blocking capacitor C8.

  The collector of the transistor T3 is connected to the operating power supply + B through a parallel circuit of a collector resistor R7 and a collector capacitor C9, and the emitter of the transistor T3 is grounded. The base of the transistor T3 is connected to the operating power supply + B via the bias resistor R8 and grounded via the bias resistor R9. The collector of the transistor T3 is connected to the base of the NPN transistor T4 of the fourth amplifier circuit 35 via the DC blocking capacitor C10.

  The collector of the transistor T4 is connected to the operating power supply + B through a parallel circuit of a collector resistor R10 and a collector capacitor C11, and the emitter of the transistor T4 is grounded. The collector and base of the transistor T4 are connected via the bias resistor R11, and the collector of the transistor T4 is connected to the output terminal 36 via the resistor R12.

  In the extraction circuit 29 having such a configuration, the first to fourth amplifier circuits 32, 33, 34, and 35 are biased so as to operate as a class B or a class C. Therefore, the input signal given to the input terminal 31 is as shown in FIG. 3A in which the weak power wave d1 data wave f2 is superimposed on the large power wave b1 power wave f1, but the first amplification is performed. By the class B or class C amplification operation of the circuit 32, the data wave f2 is amplified with a high gain, and the power wave f1 is amplified with a smaller gain.

  As a result, as the amplified output of the first amplifier circuit 32, as shown in FIG. 3B, the power of the data wave f2 is amplified to D1, and the relative ratio of the power to the power wave f1 is improved. Therefore, the second, third, and fourth amplifier circuits 33, 34, and 35 amplify in the same manner, whereby the power of the data wave f2 can be further amplified and the relative ratio with the power wave f1 can be greatly improved. .

  In the first and fourth amplifier circuits 32 and 35, the bases of the transistors T1 and T4 may be grounded via a bias resistor. In the second, third, and fourth amplifier circuits 33, 34, and 35, the emitters of the transistors T2, T3, and T4 are grounded through an emitter resistor, and the bias voltage is set to be more class C operation. May be.

  Further, any of the first to fourth amplifier circuits 32, 33, 34, and 35 constituting the extraction circuit 26a may be omitted, or any of the circuits may overlap. . In short, the number of stages of the amplifier circuit may be appropriately set according to the relative ratio of the power of the input power wave f1 and the data wave f2 superimposed thereon. Therefore, the extraction circuit 26a may be configured by a single stage amplifier circuit.

  In addition, collector capacitors C4, C7, C9, and C11 are provided at the collectors of the transistors T1, T2, T3, and T4 of the first to fourth amplifier circuits 32, 33, 34, and 35. As shown in FIG. 4, the gain of the circuit characteristics decreases as the frequency increases with respect to a frequency signal of a predetermined frequency or higher. Therefore, by setting the second frequency of the data wave f2 in the vicinity where the gain is reduced with respect to the frequency, the gain of the high frequency power wave f1 is reduced to suppress amplification, and the low frequency data wave f2 is suppressed. Can be amplified with high gain. Also from such amplifier circuit characteristics, the data wave f2 can be extracted from the power wave f1.

  By the way, in the first amplifier circuit 32, an emitter resistor R2 is provided. When the transistor T1 is turned on, the emitter potential rises and voltage negative feedback acts. In addition, since the bias resistor R3 connects the base and collector of the transistor T1, when the transistor T1 becomes conductive, the collector potential decreases, and the base potential also decreases accordingly. Therefore, current negative feedback acts. Therefore, in the first amplifier circuit 32, both voltage and current negative feedback act, and saturation of the transistor T1 is avoided. In the second and fourth amplifier circuits 33 and 35, negative current feedback acts by the bias resistors R5 and R11, and saturation of the transistors T2 and T4 is avoided. As a result, the data wave f2 is not distorted or cannot be detected due to saturation.

  As described above, due to the amplification operations of the first to fourth amplifier circuits 32, 33, 34, and 35, the extraction circuit 26a receives the input signal as shown in FIG. A signal as shown in FIG. That is, the input that was the power d1 of the data wave f2 to the power b1 of the power wave f1 becomes the power D4 of the data wave f2 to the power B4 of the power wave f1, and the relative ratio of the power of the data wave f2 is large. It will be a thing. Therefore, the data signal as shown in FIG. 5C can be easily demodulated by appropriately shaping the output of the extraction circuit 26a as shown in FIG. 5B by the shaping circuit 26b.

  In the above description, NPN transistors T1, T2, T3, and T4 are used as the amplifying elements of the first to fourth amplifying circuits 32, 33, 34, and 35, but field effect transistors are used as the amplifying elements. May be. By using the field effect transistor, power consumption by the amplifier circuit itself can be suppressed, a sufficient margin can be given to the capacity of the operating power supply, and it is also suitable for a one-chip IC.

  Next, the structure of the wireless card 20 will be described in detail with reference to FIG. As shown in FIG. 7, the wireless card 20 is assembled on a business card-sized rectangular substrate 41 made of a member that transmits radio waves, for example, a dielectric. That is, the first coil L1 and the second coil L2 are arranged in the central section P2 in which the surface of the substrate 41 is divided into three strips on the short side. Both the first and second coils L1 and L2 are formed in a flat rectangular shape, and the second coil L2 is formed in a double ring on the same plane inside the first coil L1. Arranged concentrically.

  On the surface of the substrate 41, a ground foil 42 is provided on one long side section P3, and a one-chip IC 29 is provided on the ground foil 42. The one-chip IC 29 and the first and second coils L1 and L2 are through-holes for electrically connecting the connection lines 43, 43,... Provided on the front surface and the back surface of the substrate 41 and the front surface and the back surface of the substrate 41. (Not shown).

  The first and second coils L1, L2, the ground foil 42, and the connection lines 43, 43,... Are formed by, for example, etching of conductive foil or vapor deposition of conductive metal.

  Further, as shown in FIGS. 8 (a) and 8 (b), insulating layers 44 and 45 are laminated on the front and back surfaces of the substrate 41, respectively, and a circuit member including the first and second coils L1 and L2. Are all sealed. Further, the magnetic recording layer 46 is disposed on the surface of one insulating layer 44 or 45 facing the section P1 on the other long side different from the long side on which the ground foil 42 is provided. In this way, the wireless card 20 is formed into a rectangular card shape having a business card size as a whole.

  In such a configuration, since the substrate 41 and the insulating layers 44 and 45 transmit electromagnetic waves, the wireless card 20 is held in the hand 30 and the front or back surface of the wireless card 20 is placed on the wireless card reader as shown in FIG. By holding the writer 10 over the writer 10, the power wave f1 from the wireless card reader / writer 10 is received by the power wave antenna 21 including the first coil L1 at the center, and the data wave f2 is received by the second coil L2. Is received by the data wave antenna 24 and the radio card 20 functions.

  Here, when the wireless card 20 is held over the wireless card reader / writer 10, it is held by the hand 30 with the long side as shown in FIG. There are many cases. As a result, the first and second coils L1 and L2 arranged in the central section P2 divided into three on the short side are less likely to be covered with the fingers of the hand 30 and the power wave f1 and The data wave f2 can be reliably received.

  Further, since the first coil L1 has a large shape, the power wave f1 can be received efficiently, the capacity of the operating power of the wireless card 20 can be increased, and the operation of the wireless card 20 is ensured. The

  The first coil L1 and the second coil L2 are arranged next to each other by arranging the other coil on the inner side surrounded by one coil so as to form a double ring on the same plane. In this case, one coil is covered with a finger or the like, and only the other coil cannot receive the power wave f1 or the data wave f2, and the reception conditions of the first and second coils L1 and L21 are almost the same. It becomes the same.

  Furthermore, since the insulating layers 44 and 45 are laminated so that the circuit member of the wireless card 20 is sealed, electrical accidents such as coil disconnection and circuit short circuit are unlikely to occur, and the durability is high. In addition, if the first and second coils L1, L2, etc. are formed by etching or vapor deposition, it is suitable for mass production at low cost.

  If the wireless card 20 is used as a commuter pass, for example, a service period and a service section are appropriately printed on the surface of one of the insulating layers 44 or 45, and the service period and service are used on the magnetic recording layer 46. Data such as the section is appropriately recorded, and similarly, the data such as the regular period and the regular section are appropriately stored in the storage element of the CPU 28.

  Then, if the wireless card reader / writer 10 is installed in an automatic ticket gate at the station, the ticket checking operation is performed in a non-contact manner, and the magnetic reader or the like is installed without the wireless card reader / writer 10 being installed. If it is installed, the ticket checking action is executed using the data recorded in the magnetic recording layer 46, and if the automatic ticket checker is not installed, the ticket checking action can be performed using the character data printed on the surface. it can.

  In the above description, the first coil L1 and the second coil L2 are arranged in the central section as flat rectangular shapes. However, if the magnetic recording layer 46 is not provided, the place where the one-chip IC 29 is mounted. The first and second coils L <b> 1 and L <b> 2 may be disposed so as to surround the central portion of the entire surface of the substrate 41 other than the above.

  Further, the first coil L1 and the second coil L2 do not necessarily have to be provided in the central section equally divided into three on the short side of the substrate 41, and may be provided in the central portion. Further, the first coil L1 and the second coil L2 may be provided on the front surface and the back surface of the substrate 41, respectively.

  As described above, according to the wireless communication system of the above-described embodiment, the response wave from the wireless card uses the low second frequency obtained by dividing the first frequency of the power wave. Unnecessary radiation is less than that using a multiplier circuit or the like, and a member for preventing unnecessary radiation is not required. In addition, since the data wave and the response wave both use the second frequency obtained by dividing the first frequency of the power wave, the data wave and the response wave can be transmitted and received by one antenna. Therefore, it is particularly suitable for a wireless card that is required to be downsized.

  Further, according to the wireless communication system of the above embodiment, since the data wave superimposed on the power wave is extracted using the amplifier circuit whose gain decreases as the frequency increases, the high-frequency power wave is suppressed, A low-frequency data wave is amplified with a high gain, and by appropriately providing the number of stages of amplifier circuits, the relative ratio of the data wave to the power wave can be improved to an appropriate size. Demodulation is easy.

  Further, according to the wireless communication system of the above embodiment, since the data wave superimposed on the power wave is extracted using the amplification circuit operating in the class B or class C, the power wave with large power is suppressed, The weak data wave superimposed on the power wave envelope is amplified with a high gain, and by appropriately providing the number of stages of amplifier circuits, the relative ratio of the data wave to the power wave can be improved to an appropriate size, and shaping The data signal can be easily demodulated from the data wave by the circuit.

  Furthermore, according to the wireless communication system of the above embodiment, since ASK modulation is used for both data waves and response waves transmitted and received between the wireless card reader / writer and the wireless card, the signal is demodulated. This circuit is very simple. Further, since the amplification circuit as the extraction circuit is formed without including the coil element, the circuit can be miniaturized without requiring a coil element having a large size. In addition, it is easy to make an IC.

  Further, according to the wireless card of the above embodiment, the first coil that forms the power wave antenna that receives the power wave and the data wave antenna that receives the data wave are formed at the center of the card. Since the second coil is arranged so as to form a double ring, the first coil and the second coil may be covered with a finger or the like holding the card when the card is held over the wireless card reader / writer. In addition, the first coil and the second coil have substantially the same reception status, and the reception status of both coils does not differ greatly. Further, since the first coil and the second coil are provided on the substrate through which electromagnetic waves are transmitted, communication can be performed by holding any surface over the wireless card reader / writer.

  In addition, according to the wireless card of the above embodiment, the first coil and the second coil are formed in a flat rectangular shape and arranged in a central section divided into three on the short side of a business card size rectangular substrate. Therefore, there is no possibility that the first coil and the second coil are covered with a finger or the like holding the card.

  Further, according to the wireless card of the above embodiment, since the second coil is disposed on the inner side surrounded by the first coil on the same plane of the substrate, the power wave can be received more efficiently. The capacity of the operating power supply can be increased, and the operation can be performed reliably.

  Furthermore, according to the wireless card of the above embodiment, since the circuit member including the first coil and the second coil is sealed by the insulating layer, an electrical accident such as disconnection of the coil or short-circuiting of the coil hardly occurs. Moreover, it is rich in durability. And by recording the same contents as the data stored in the memory element of the CPU on the magnetic recording layer provided on the surface of the insulating layer, not only as a wireless card of a wireless communication system but also with a magnetic reader It can also be used as a magnetic card for reading data between them.

  Further, according to the extraction circuit of the demodulation circuit in the wireless card of the above embodiment, since the amplifier circuit operates as class B or class C, the data wave superimposed on the power wave is amplified with a gain higher than that of the power wave. The relative ratio of the power of the data wave to the power wave is improved, and the data wave can be easily extracted. In addition, the coil element is not included as a circuit component, so that the circuit can be configured in a smaller size and is suitable for making the circuit into an IC. Therefore, it is optimal as an extraction circuit that constitutes a circuit that has dimensional restrictions and a one-chip IC is desired, such as a circuit mounted on a wireless card.

  Further, according to the extraction circuit of the above embodiment, since the gain of the amplifier circuit decreases as the frequency increases, the power wave of high frequency has a low gain, and the data wave of lower frequency has a high gain. Become. As a result, in the amplified output, the relative ratio of the power of the data wave to the power wave is improved, and the data wave can be easily extracted.

  Furthermore, according to the extraction circuit of the above embodiment, since a plurality of amplifier circuits that increase the relative ratio of the power of the data wave to the power wave are connected, the relative power of the first input power wave and the power of the data wave By appropriately setting the number of stages in accordance with the ratio, a relative ratio that allows easy extraction of data waves can be achieved.

The block diagram which shows the structure of the radio | wireless communications system which concerns on embodiment of this invention. The circuit diagram which shows the specific structural example of the extraction circuit in a demodulation circuit. The wave form diagram which shows an example of the amplification operation | movement by an extraction circuit. FIG. 6 is a characteristic diagram of frequency vs. gain included in the amplification circuit of the extraction circuit. The wave form diagram for demonstrating operation | movement of an extraction circuit. The wave form diagram which shows an example of the response wave transmitted from a radio card. It is a figure for demonstrating the structure of a radio | wireless card, (a) is a front view, (b) is a back view. It is a figure explaining laminating | stacking an insulating layer on both surfaces of the board | substrate which comprises a radio card, (a) is a vertical side view after lamination | stacking, (b) is a disassembled perspective view. The perspective view which shows an example of the use condition of a wireless card.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Wireless card reader / writer (communication device), 11 ... Power wave antenna, 12 ... Data wave antenna, 20 ... Wireless card, 21 ... Power wave antenna, 22 ... Rectifier circuit, 23 ... Frequency divider circuit, 24 Data antenna, 25 Transmission / reception changeover switch, 26 Demodulation circuit, 26a Extraction circuit, 26b Shaping circuit, 27 Modulation circuit, 28 CPU (control means), 29 1-chip IC, 32-35 Amplifier circuit, L1 ... first coil, L2 ... second coil, 41 ... substrate, 43 ... connection line, 44,45 ... insulating layer, 46 ... magnetic recording layer, f1 ... power wave, f2: Data wave, f3: Response wave.

Claims (3)

A first coil that forms a power wave antenna that receives a power wave of a first frequency transmitted from an external communication device, and data that transmits and receives a data wave of a second frequency different from the first frequency A wireless card comprising a second coil forming a wave antenna ,
When the plane of the rectangular card-like substrate formed of a member that transmits radio waves is divided into three strips on the short side , the first coil is separated from at least one of the long sides. And arranged along the outer periphery of the section,
A wireless card, wherein the second coil is disposed substantially concentrically so as to be doubled inside the first coil .   The wireless card according to claim 1, wherein the second coil is disposed on an inner side surrounded by the first coil on the same plane of the substrate. A circuit member excluding the first coil and the second coil is disposed in one long side section divided into three of the substrate, and the first coil, the second coil, and the circuit member. An insulating layer is laminated on both surfaces of the substrate on which the magnetic recording layer is disposed, and a magnetic recording layer is disposed on the surface of the insulating layer on one side so as to face the other long side divided into three of the substrate. The wireless card according to claim 1 .

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