JP2007150863A - Device with radio communication function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device with a radio communication function, which electrically and excellently connects a high frequency circuit for radio communication provided in a main body, and the radiation electrode of an antenna structure freely detachably attached to the main body, while suppressing conductor loss by simple constitution. <P>SOLUTION: In the device 1 with the radio communication function, having a detachable antenna structure 3 to be freely detachably attached to the main body 2 having the high frequency circuit 4 for the radio communication, the main body 2 is provided with the radiation electrode 5 of an antenna electrically connected to the high frequency circuit 4 for the radio communication to perform an antenna operation and perform radio communication. The detachable antenna structure 3 is provided with the radiation electrode 7 for performing the antenna operation. The radiation electrode 7 of the detachable antenna structure 3 is electrically connected with the radiation electrode 5 of the antenna of the main body 2 by electromagnetic coupling in a state of noncontact with the radiation electrode 5 of the antenna of the main body 2, and performs the antenna operation together with the radiation electrode 5 of the antenna of the main body 2, and the radio communication by the high frequency circuit 4 for the radio communication of the main body 2 is performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a device with a wireless communication function including a detachable antenna structure.

  FIG. 4A is a schematic perspective view showing a configuration example of a card radio 40 that is one of the devices with a wireless communication function (see, for example, Patent Document 1). The card radio 40 includes a main body 42 that includes a high-frequency circuit 41 for wireless communication, and a connecting antenna 43 that is detachably attached to the side of the main body 42.

  The coupled antenna 43 includes a radiation electrode (not shown) that performs an antenna operation, and a case 44 that houses the radiation electrode. The case 44 is formed with a plurality of protruding pieces 45 for attaching the connecting antenna 43 to the main body 42. Further, the case 44 is formed with a coaxial connector 46 that is electrically connected to the built-in radiation electrode.

  FIG. 4B schematically shows the main body 42 as viewed from the right side of FIG. A plurality of protruding piece receiving portions 47 and a coaxial connector 48 are formed on the main body 42. The opening of each protruding piece receiving portion 47 is formed on the end face of the main body 42 on the side to which the connecting antenna 43 is connected, according to the arrangement position of the corresponding protruding piece 45 of the connecting antenna 43. Each of the protruding piece receiving portions 47 has an internal configuration for detachably fixing the protruding piece 45 inserted from the opening. The coaxial connector 48 is a receiving-side connector that fits with the coaxial connector 46 of the coupling antenna 43. The coaxial connector 48 is electrically connected to the radio communication high frequency circuit 41 of the main body 42.

  In the configuration of the card radio 40, the projecting pieces 45 of the coupling antenna 43 are inserted into the projecting piece receiving portions 47 through the openings of the corresponding projecting piece receiving portions 47 of the main body 42. The arrangement position of the coupling antenna 43 with respect to 42 is positioned, the coaxial connector 46 of the coupling antenna 43 is automatically fitted into the coaxial connector 48 of the main body 42, and the coaxial connectors 46 and 48 are connected. By connecting the coaxial connectors 46 and 48, the radiation electrode of the coupling antenna 43 is electrically connected to the high-frequency circuit 41 for wireless communication of the main body 42 via the coaxial connectors 46 and 48, and the antenna operation can be performed. .

Special Table 2000-514962 Publication JP 2004-128982 A

  By the way, the coaxial connector 46 of the connection antenna 43 has a conductor portion that is electrically connected to the radiation electrode built in the connection antenna 43. The coaxial connector 48 of the main body 42 has a conductor portion that is electrically connected to the high-frequency circuit 41 for wireless communication. When the coaxial connectors 46 and 48 are fitted to each other and the conductor portion of the coaxial connector 46 and the conductor portion of the coaxial connector 48 are in direct contact, the conductor portions of the coaxial connectors 46 and 48 are connected via the direct contact portion. The radiation electrode built in the antenna 43 and the high-frequency circuit 41 for wireless communication of the main body 42 are electrically connected.

  In the card radio 40 shown in FIG. 4A, the electrical connection between the radiation electrode of the coupling antenna 43 and the high-frequency circuit 41 for wireless communication of the main body 42 is established by connecting the coaxial connectors 46 and 48 as described above. A connection is made. For this reason, the following problems arise. That is, a high-frequency current is passed through a current conduction path that electrically connects the high-frequency circuit 41 for wireless communication and the radiation electrode of the coupling antenna 43. For this reason, if the direct contact between the conductor portions of the coaxial connectors 46 and 48 is not made with high accuracy and almost as designed, the conduction loss of the high-frequency current at the direct contact portion between the conductor portions of the coaxial connectors 46 and 48 is reduced. There is a problem that the electrical connection between the radiation electrode of the coupling antenna 43 and the high frequency circuit 41 for wireless communication of the main body 42 is not realized.

  In order to solve such a problem, it is conceivable to have a configuration for performing electrical connection between the main body 42 and the coupling antenna 43 with high accuracy as designed, but having such a configuration. This causes a problem that the structure of the card radio 40 is complicated.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a high-frequency circuit for wireless communication provided in a main body and a radiation electrode of an antenna structure that is detachably attached to the main body. An object of the present invention is to provide an apparatus with a wireless communication function that can be electrically connected with good structure while suppressing conductor loss.

In order to achieve the above object, the present invention has the following configuration as means for solving the above problems. That is, the present invention relates to a device with a wireless communication function including a detachable antenna structure that is detachably attached to a main body having a high-frequency circuit for wireless communication.
The main body is provided with a radiation electrode of an antenna that is electrically connected to a high-frequency circuit for wireless communication and performs antenna communication to perform wireless communication.
The detachable antenna structure includes a radiating electrode that performs antenna operation. The radiating electrode of the detachable antenna structure is electrically connected to the radiating electrode of the main body antenna by electromagnetic coupling in a non-contact state with the radiating electrode of the main body antenna. Connected to each other, and performs antenna operation together with the radiation electrode of the antenna of the main body to perform wireless communication using a high-frequency circuit for wireless communication of the main body.

  According to this invention, the detachable antenna structure that is detachably attached to the main body is provided, and the radiation electrode of the detachable antenna structure is coupled to the main body by electromagnetic coupling in a non-contact state with the radiation electrode of the antenna of the main body. It is electrically connected to the radiation electrode of the antenna. With this connection, the radiation electrode of the detachable antenna structure is configured to perform an antenna operation together with the radiation electrode of the antenna of the main body. In the configuration of the present invention, since the electrical connection between the radiation electrode of the antenna of the main body and the radiation electrode of the detachable antenna structure is performed by electromagnetic coupling in a non-contact state, the antenna structure is attached to the main body. Even without high positional accuracy, the radiation electrode of the detachable antenna structure can be electrically connected well to the radiation electrode of the antenna of the main body. For this reason, the structure for attaching the detachable antenna structure to the main body can be simplified.

  In the present invention, the radiation electrode of the detachable antenna structure performs an antenna operation together with the radiation electrode of the antenna of the main body. For this reason, for example, when the detachable antenna structure is not attached to the main body and the radiating electrode of the main body antenna is operating alone, the resonance frequency band of the radiating electrode of the main body antenna is the same frequency band. Accordingly, when the radiation electrode of the detachable antenna structure operates as an antenna, the radiation electrode of the detachable antenna structure is electromagnetically coupled to the radiation electrode of the antenna of the main body, and the antenna operates together with the radiation electrode of the antenna of the main body. As a result, the power of radio waves to be transmitted wirelessly can be increased, and the reception sensitivity of wireless communication can be increased. The size of the radiation electrode of the antenna of the main body is often restricted due to restrictions such as the size of the main body, and it is not easy to improve the power of radio waves for radio transmission and the reception sensitivity of radio communications. On the other hand, in many cases, since the size restriction on the detachable antenna structure is loose, the radiation electrode of the detachable antenna structure can be made larger than the radiation electrode of the antenna of the main body. For this reason, the radiation electrode of the detachable antenna structure can easily increase the power of radio transmission radio waves or increase the reception sensitivity of wireless communication than the radiation electrode of the antenna of the main body. By electromagnetically coupling the radiating electrode of such a detachable antenna structure to the radiating electrode of the main body antenna and operating both of them, the radio wave of radio transmission can be compared with the radio communication of the radiating electrode of the main body antenna alone. Power and reception sensitivity of wireless communication can be dramatically improved. As a result, a device with a wireless communication function (for example, a card-type device such as a PC card or a CF card having a wireless communication function, a personal computer with a wireless communication function, or an information terminal device such as a PDA (Personal-Digital-Assistance) Etc.) can be provided with a configuration unique to the present invention, thereby improving the reliability of wireless communication. Note that CF (compact flash) is a registered trademark.

  Further, since the radiation electrode of the detachable antenna structure performs an antenna operation together with the radiation electrode of the antenna of the main body, for example, by electromagnetically coupling the radiation electrode of the removable antenna structure to the radiation electrode of the main body antenna, As shown in FIG. 4, the frequency band of wireless communication can be switched. In other words, when the detachable antenna structure is not attached to the main body and the radiating electrode of the main body antenna is operating alone, the frequency band based on the electrical length of only the radiating electrode of the main body antenna is used. Wireless communication. On the other hand, when the detachable antenna structure is attached to the main body and the radiating electrode of the detachable antenna structure is electromagnetically coupled to the radiating electrode of the main body antenna, the electrical length of the radiating electrode of the main body antenna In the frequency band based on the electrical length of the detachable antenna structure plus the radiation length of the detachable antenna structure (that is, the frequency band lower than the frequency band by wireless communication of the radiation electrode of the main unit alone) It can be configured to communicate. By providing this configuration, for example, when performing wireless communication in a predetermined higher frequency band, wireless communication is performed only with the radiation electrode of the antenna of the main body, and when performing wireless communication in the lower frequency band, the main body The radio communication frequency band can be switched, such as performing radio communication by electromagnetically coupling the radiation electrode of the detachable antenna structure to the radiation electrode of the antenna. Thereby, it is possible to provide a device with a wireless communication function that can support wireless communication in a plurality of frequency bands.

  Further, the radiation electrode of the detachable antenna structure is electrically connected to the radiation electrode of the antenna of the main body by non-contact electromagnetic coupling, and is connected to the radio frequency circuit for radio communication of the main body via the radiation electrode of the antenna of the main body. Since it is electrically connected, impedance matching can be achieved without providing a matching circuit for matching impedance between the radiation electrode side of the detachable antenna structure and the high-frequency circuit side for radio communication of the main body. . Thereby, the matching circuit can be omitted, and the circuit configuration can be simplified.

  The many excellent effects as described above can be obtained in the same manner regardless of whether the radiation electrode of the detachable antenna structure forms a balanced antenna or a structure that forms an unbalanced antenna. it can.

  By providing a configuration in which the radiation electrode of the antenna of the main body is attached to the main body in the form of a surface mount type component, the main body of the device with a wireless communication function can be reduced in size. In other words, since a surface-mounting type antenna having a radiation electrode can be easily reduced in size, it is possible to reduce the size of the main body of a device with a wireless communication function by providing a small surface-mounting type antenna in the main body. Can be achieved. Further, the size of the radiation electrode can be reduced, so that the component arrangement space in the main body of the device with the wireless communication function can be expanded.

  Since the radiation electrode of the antenna of the main body is formed by a coil in a form in which a conductive wire is wound around the core, the electromagnetic field of the radiation electrode of the antenna of the main body becomes strong, The electromagnetic coupling between the radiation electrode of the antenna of the main body and the radiation electrode of the detachable antenna structure can be strengthened. Thereby, the stability of the electrical connection by the electromagnetic coupling with the radiation electrode of the antenna of a main body and the radiation electrode of a detachable antenna structure can be improved.

  Further, a magnet for attaching the detachable antenna structure is provided on one side of the main body and the detachable antenna structure, and attaching a magnetic body that is magnetically attracted to the magnet for attaching the detachable antenna structure on the other side. By providing the configuration in which the unit is provided, the detachable antenna structure can be attached to the main body with a simple configuration, and the structure of the device with a wireless communication function can be prevented from becoming complicated. In addition, since the detachable antenna structure can be easily attached to and detached from the main body, the usability of the device with a wireless communication function can be improved.

  The detachable antenna structure is provided with a magnet for attaching the detachable antenna structure, and the coil core that is the radiation electrode of the antenna of the main body is magnetically attracted to the magnet for attaching the detachable antenna structure. With this configuration, the coil core, which is the radiation electrode of the antenna of the main body, also functions as the mounting portion, so that there is no need to provide a dedicated part for the mounting portion in the main body.

  When the detachable antenna structure is attached to the main body, the casing portion located between the radiating electrode of the detachable antenna structure and the radiating electrode of the antenna of the main body is made of a magnetic material. By providing, the magnetic body of the housing portion can enhance electromagnetic coupling between the radiation electrode of the detachable antenna structure and the radiation electrode of the antenna of the main body.

  Embodiments according to the present invention will be described below with reference to the drawings.

  FIG. 1 shows a simplified perspective view of a card-type device which is a first embodiment of a device with a wireless communication function according to the present invention. The card-type device 1 includes a main body 2 and a detachable antenna structure 3 that is detachably attached to the main body 2. The main body 2 has a configuration in which a radio communication high-frequency circuit 4 and a radiation electrode 5 are housed in a housing 6. The radiation electrode 5 is electrically connected to the radio frequency circuit 4 for wireless communication and functions as an antenna. In the first embodiment, the radiation electrode 5 is constituted by a coil formed by winding a conductive wire. The card-type device 1 is used by being inserted into a slot for accommodating a card provided in an information terminal device such as a personal computer, for example, with an insertion direction indicated by an arrow A in FIG. In the first embodiment, the radiation electrode 5 is disposed on the insertion rear end side of the main body 2.

  The detachable antenna structure 3 has a radiation electrode 7 that functions as a dipole antenna, which is a kind of balanced antenna. In the first embodiment, the radiation electrode 7 that functions as a dipole antenna has a rod-shaped conductor portion 8 (8a, 8b) and a conductor portion 9 that is a power feeding portion. The power feeding section 9 is formed as a coil formed by winding a conducting wire, and rod-shaped conductor portions 8 are connected to both ends of the power feeding section 9 respectively. The power feeding unit 9 is housed inside the case 10, and the rod-shaped conductor portions 8 a and 8 b connected to both ends of the power feeding unit 9 are disposed so as to protrude through the case 10 to the outside. .

  In the first embodiment, the case 10 of the detachable antenna structure 3 can be detachably attached to the end face on the rear end side of the housing 6 of the main body 2. The attachment position of the case 10 on the end face on the rear end side of the housing 6 of the main body 2 is a position where the feeding portion 9 of the radiation electrode 7 of the detachable antenna structure 3 and the radiation electrode 5 of the main body 2 can be electromagnetically coupled. Here, the position of the end face on the rear end side of the housing 6 where the distance between the feeding portion 9 of the radiation electrode 7 of the detachable antenna structure 3 and the radiation electrode 5 of the main body 2 is the shortest is This is the mounting position of the case 10 of the detachable antenna structure 3. The case 10 of the detachable antenna structure 3 is detachably attached to the housing 6 of the main body 2 and the case 10 of the detachable antenna structure 3 at the setting position of the case 10 in the housing 6. Is provided. Various configurations are conceivable for the attachment, and any of the configurations may be adopted.

  For example, the magnet 12 for attaching the antenna structure is provided on the side surface of the case 10 of the detachable antenna structure 3 on the main body 2 side. In addition, an attachment portion made of a magnetic material is provided on the end face on the rear end side of the housing 6 at a position corresponding to the arrangement position of the magnet 12 for attaching the antenna structure. Alternatively, the end surface on the rear end side of the housing 6 is made of a magnetic material having a size substantially the same as that of the entire region in the region (antenna structure mounting region) facing the case 10 of the detachable antenna structure 3. A mounting part is provided. Alternatively, at least the housing part itself serving as the antenna structure mounting region on the end surface on the rear end side of the housing 6 may be formed of a magnetic material to serve as the mounting portion. The attachment portion provided on the housing 6 of the main body 2 is magnetically attracted to the magnet 12 for attaching the antenna structure of the case 10 of the detachable antenna structure 3 so that the detachable antenna structure 3 is attached to the housing of the main body 2. It is detachably attached to the body 6. In order to attach the detachable antenna structure 3 to the setting attachment position of the housing 6 of the main body 2, for example, the side surface of the case 10 of the detachable antenna structure 3 on the main body 2 side is connected to the main body 2 side. A protrusion projecting toward the end is provided, and the protrusion of the detachable antenna structure 3 has almost no gap on the end face (end face on the antenna structure mounting side) of the housing 6 of the main body 2 after insertion. You may provide the structure which provides the recessed part to fit. You may provide the structure for controlling the attachment position of the detachable antenna structure 3 with respect to the main body 2 like this.

  In the first embodiment, the detachable antenna structure 3 is attached to the main body 2 so that the radiating electrode 5 of the main body 2 and the feeding portion 9 of the radiating electrode 7 of the detachable antenna structure 3 are in a non-contact state. Electromagnetic coupling with As a result, the radiation electrode 7 functioning as a dipole antenna is electrically connected to the high-frequency circuit 4 for wireless communication of the main body 2 and can operate as an antenna to perform wireless communication. In the first embodiment, the radiation electrode 7 is configured to operate as an antenna with the same resonance frequency band as that when the radiation electrode 5 of the main body 2 performs wireless communication alone. Therefore, for example, the detachable antenna structure 3 is attached to the main body 2 when the power of the radio transmission radio wave is weak only with the radiation electrode 5 of the main body 2 or when the radio wave reception sensitivity is poor. By operating the radiation electrode 7 of the body 3 as an antenna together with the radiation electrode 5 of the main body 2, the power of radio transmission radio waves can be increased and the radio wave reception sensitivity can be increased by adding the radiation electrode 7.

  The second embodiment will be described below. In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and duplicate descriptions of common portions are omitted.

  In the second embodiment, a core made of a magnetic material is inserted into the coil constituting the radiation electrode 5 of the main body 2 at the center of the coil. Other configurations are the same as those in the first embodiment. In the second embodiment, since the core is disposed at the center of the coil that is the radiation electrode 5, for example, the case 12 of the detachable antenna structure 3 is provided with the magnet 12 for attaching the antenna structure. In this case, the core of the radiation electrode 5 can be made to function as an attachment portion that is magnetically attracted to the magnet 12 for attaching the antenna structure. In other words, the magnet 12 for attaching the antenna structure is magnetically attracted to the core of the radiation electrode 5 of the main body 2 so that the detachable antenna structure 3 can be attached to the main body 2. In the case of adopting this configuration, it is not necessary to provide a mounting portion made of a magnetic material as described in the first embodiment on the end face on the rear end side of the housing 6 of the main body 2.

  The third embodiment will be described below. In the description of the third embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals, and a duplicate description of the common portions is omitted.

  In the third embodiment, the high-frequency circuit 4 for wireless communication includes a high-frequency circuit portion corresponding to wireless communication in a predetermined lower frequency band and a high-frequency circuit corresponding to wireless communication in a higher frequency band. And a circuit portion. The radiating electrode 5 of the main body 2 is designed so as to have an electrical length for resonating in the high frequency band and performing antenna operation. The radiating electrode 7 of the detachable antenna structure 3 is designed to be electromagnetically coupled to the radiating electrode 5 of the main body 2 so as to resonate with the radiating electrode 5 in the lower frequency band and perform antenna operation. Yes.

  The other configuration of the third embodiment is the same as that of the first or second embodiment. In the configuration of the third embodiment, when performing wireless communication in the lower frequency band, the detachable antenna structure 3 is attached to the main body 2 to perform requested wireless communication. When performing wireless communication in the higher frequency band, wireless communication is performed by the main body 2 alone. By providing the configuration of the third embodiment, it is possible to provide a card-type device 1 with a multiband compatible wireless communication function.

  In addition, this invention is not limited to the form of each 1st-3rd embodiment, Various embodiments can be taken. For example, in each of the first to third embodiments, the radiation electrode 7 provided on the detachable antenna structure 3 constitutes a dipole antenna that is a balanced antenna. The radiation electrode 7 provided on the structure 3 may be a radiation electrode that constitutes a balanced antenna other than the dipole antenna. The radiation electrode 7 of the detachable antenna structure 3 may be a radiation electrode that constitutes an unbalanced antenna such as a monopole antenna.

  Further, in each of the first to third embodiments, the radiation electrode 5 of the main body 2 and the feeding portion 9 of the radiation electrode 7 of the detachable antenna structure 3 are configured by coils. The shape of the radiation electrode 7 is not particularly limited as long as it can be electromagnetically coupled to the power supply unit 9 of the radiation electrode 7 in a non-contact state. For example, the radiation electrode 5 and the power supply unit 9 of the radiation electrode 7 are shown in FIG. It may be in the form of a flat plate that is elongated like a meander. Further, the radiation electrode 5 of the main body 2 and the feeding portion 9 of the radiation electrode 7 of the detachable antenna structure 3 are configured by coils formed by winding a conductive wire. The feeding portion 9 of the radiating electrode 7 of the detachable antenna structure 3 may be in the form of a surface mount type component in which a conductor pattern as a radiating electrode is formed on a magnetic or dielectric base, for example. .

  Further, in each of the first to third embodiments, the radiation electrode 7 of the detachable antenna structure 3 has a configuration in which the feeding portion 9 is electromagnetically coupled to the radiation electrode 5 of the main body 2. The entire radiation electrode 7 of the body 3 may be electromagnetically coupled to the radiation electrode 5 of the main body.

  Furthermore, in each of the first to third embodiments, the configuration example in which the detachable antenna structure 3 is attached to the main body 2 using magnetic force adsorption has been shown. For example, the detachable antenna structure 3 is attached to the detachable antenna structure 3. A projecting portion is provided, and the housing 6 of the main body 2 is mechanically provided with a detachable antenna such that a recess for fitting and attaching the detachable antenna structure 3 to the detachable antenna structure 3 is provided. The structure 3 may be attached to the main body 2. As described above, the detachable antenna structure 3 may be attached to the main body 2 by a method other than the magnetic force adsorption. In the case where the detachable antenna structure 3 is attached to the main body 2 by a method other than the magnetic force adsorption, the detachable antenna structure 3 of the detachable antenna structure 3 is attached when the detachable antenna structure 3 is attached to the main body 2. It is good also as a structure by which the part of the housing | casing 6 located between the electric power feeding part 9 of the radiation electrode 7 and the radiation electrode 5 of the main body 2 is formed with the magnetic body. By providing such a configuration, the electromagnetic coupling between the radiation electrode 5 of the main body 2 and the feeding portion 9 of the radiation electrode 7 of the detachable antenna structure 3 can be strengthened.

  Furthermore, in each of the first to third embodiments, the card type device 1 has been described as an example. However, for example, as shown in FIG. 3, the present invention has a wireless communication function other than the card type device. The present invention can also be applied to information terminal devices such as personal computers. In the example illustrated in FIG. 3, a notebook personal computer that is a device with a wireless communication function includes a main body 13 and a detachable antenna structure 14 that is detachably attached to the main body 13. The main body 13 includes a housing 16 in which a high-frequency circuit 15 for wireless communication is accommodated and a housing 18 in which a liquid crystal screen 17 is incorporated. Inside the housing 18, there is provided a radiation electrode 19 that is electrically connected to the radio communication high-frequency circuit 15 in the housing 16 and performs antenna communication to perform radio communication. The detachable antenna structure 14 has a radiation electrode 20. The radiation electrode 20 functions as a monopole antenna, and includes a rod-shaped conductor portion 20a and a conductor portion 20b that is connected in series to one end side of the conductor portion 20b and is a power feeding portion of the radiation electrode 20. Yes. The conductor part 20b which is a power feeding part is accommodated in the casing 21, and the rod-shaped conductor part 20a passes through a wall part constituting the casing 21 and is connected to the conductor part 20b inside the casing. The casing 18 of the main body 13 and the casing 21 of the detachable antenna structure 14 are each provided with a configuration for attaching the detachable antenna structure 14 to the main body 13.

  When the detachable antenna structure 14 is attached to the main body 13, the radiation electrode 19 of the main body 13 and the feeding portion 20b of the radiation electrode 20 of the detachable antenna structure 14 are electromagnetically coupled in a non-contact state. The radiation electrode 20 of the detachable antenna structure 14 can perform an antenna operation together with the radiation electrode 19 of the main body 13 to perform wireless communication by the high-frequency circuit 15 for wireless communication.

  As described above, the present invention can be applied to any device having a wireless communication function, and can obtain the excellent effects as described above.

It is a model figure for demonstrating the example of a structure of the apparatus with a wireless communication function of 1st Embodiment. It is a model figure showing the other example of the form of the radiation electrode. It is a model figure for demonstrating other example embodiments. It is a figure for demonstrating one prior art example of the apparatus with a radio | wireless communication function which has a detachable antenna structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Card type device 2,13 Main body 3,14 Detachable antenna structure 4,15 High frequency circuit for wireless communication 5,7,19,20 Radiation electrode 6,16,18 Case

Claims (9)

In a device with a wireless communication function including a detachable antenna structure that is detachably attached to a main body having a high-frequency circuit for wireless communication
The main body is provided with a radiation electrode of an antenna that is electrically connected to a high-frequency circuit for wireless communication to operate the antenna and perform wireless communication,
The detachable antenna structure includes a radiating electrode that performs antenna operation. The radiating electrode of the detachable antenna structure is electrically connected to the radiating electrode of the main body antenna by electromagnetic coupling in a non-contact state with the radiating electrode of the main body antenna. And wireless communication using a high-frequency circuit for wireless communication of the main body by performing an antenna operation together with the radiation electrode of the antenna of the main body.   The apparatus with a wireless communication function according to claim 1, wherein the radiation electrode of the detachable antenna structure constitutes a balanced antenna.   The apparatus with a wireless communication function according to claim 1, wherein the radiation electrode of the detachable antenna structure constitutes an unbalanced antenna.   4. The radiating electrode of the antenna of the main body is provided on the main body in the form of a surface-mount type component in which the radiating electrode is provided on the base. With wireless communication function.   4. The radio according to claim 1, wherein the radiation electrode of the antenna of the main body is constituted by a coil having a form in which a conductive wire is wound around a magnetic core. Equipment with communication function.   A magnet for attaching the detachable antenna structure is provided on one side of the main body and the detachable antenna structure, and an attachment portion made of a magnetic material is provided on the other side, and the detachable antenna structure is provided. The wireless communication function according to any one of claims 1 to 5, wherein the attachment portion is magnetically attracted to an attachment magnet, and the detachable antenna structure is detachably attached to the main body. apparatus. The removable antenna structure is provided with a magnet for attaching the removable antenna structure.
The radiation electrode of the antenna of the main body has a configuration formed by a coil of a mode in which a conductive wire is wound around a magnetic core,
The apparatus with a wireless communication function according to claim 6, wherein the core constituting the radiation electrode of the antenna of the main body functions as an attachment portion that is magnetically attracted to a magnet for attaching the detachable antenna structure. The radio frequency circuit for radio communication of the main body and the radiation electrode of the antenna of the main body are housed in the housing,
When the detachable antenna structure is attached to the main body, the housing portion located between the radiating electrode of the detachable antenna structure and the radiating electrode of the antenna of the main body is made of a magnetic material. The device with a wireless communication function according to claim 1, wherein the device has a wireless communication function. The high frequency circuit for wireless communication has a high frequency circuit portion corresponding to wireless communication in a predetermined low frequency band, and a high frequency circuit portion corresponding to wireless communication in a high frequency band,
The radiation electrode of the antenna of the main body is configured to perform radio communication in the high frequency band alone,
9. The radiating electrode of the detachable antenna structure is configured to perform radio communication in a lower frequency band by operating an antenna together with the radiating electrode of the antenna of the main body. The apparatus with a wireless communication function according to any one of the above.

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