WO2004109852A1 - アンテナモジュール及びこれを備えた携帯型通信端末 - Google Patents
アンテナモジュール及びこれを備えた携帯型通信端末 Download PDFInfo
- Publication number
- WO2004109852A1 WO2004109852A1 PCT/JP2004/008172 JP2004008172W WO2004109852A1 WO 2004109852 A1 WO2004109852 A1 WO 2004109852A1 JP 2004008172 W JP2004008172 W JP 2004008172W WO 2004109852 A1 WO2004109852 A1 WO 2004109852A1
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- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- antenna coil
- antenna module
- substrate
- communication
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
Definitions
- the present invention relates to an antenna module and a portable communication terminal having the same.
- the present invention relates to a radio frequency identification (RFID): Radio Frequency
- an antenna coil is built in an identification IC tag such as an IC card, and the antenna coil is inductively coupled with radio waves transmitted from a transmission / reception antenna of a reader / writer. Data communication.
- a portable communication terminal such as a mobile phone or a PDA (Personal Digital Assistant) with a tag function and a reader / writer function.
- a tag function By adding a tag function to mobile phones, for example, it becomes possible to pay train fares by holding the mobile phone over a ticket gate.
- a mobile phone if a mobile phone is provided with a reader / writer function, the mobile phone will have a function of replacing a ticket vending machine in a station yard. For example, information such as the balance of another IC tag (IC card) can be obtained. Can be confirmed, and a siper charge is also possible.
- IC tag IC card
- a mobile phone or the like can have a tag function and a reader / writer function, it is necessary to individually install dedicated antenna modules for the tag function and reader / writer function on the terminal itself. Occurs. In other words, when used as a tag, an antenna module used for communication with an external reader / writer is required, and when used as a reader / writer, an antenna module used for communication with an external IC tag (IC card) is required. is there.
- the communication distance is as long as possible, and the reader / writer and the In such a case, there is a demand for a flat and wide communication area.
- the communication distance is important for the IC tag, and the communication range is more important for the reader / writer than the communication distance.
- the communication characteristics of the antenna module required for the tag function and the communication characteristics of the antenna module required for the reader / writer function are different, and each requires a different antenna shape. Is almost impossible to satisfy.
- Patent Document 1 Japanese Unexamined Patent Application Publication No. Hei 8-1947585 discloses an IC car. A technique for improving the antenna coil of a reader / writer for increasing the communication distance between the reader / writer and the reader / writer is disclosed. Further, Patent Document 2 (Japanese Patent Application Laid-Open No. 11-166260) describes a configuration of an IC card having an antenna coil for improving information transmission efficiency. Patent Document 3 (Patent Document 2) Japanese Patent Application Publication No. 0 02—1 528 88) describes a configuration of a reader / writer capable of performing multiple communications with a plurality of different transponders (IC tags). Further, Patent Document 4 (Japanese Patent Application Laid-Open No. 2002-325013) discloses a configuration of an antenna module for avoiding deterioration of communication characteristics due to mutual interference with an object to be mounted. .
- the present invention has been made in view of the above-described problems, and has an antenna module having both of two functions, that is, a long communication distance as a tag and a wide communication area as a reader / writer, while realizing space saving. It is an object to provide a portable communication terminal. Disclosure of the invention In solving the above problems, the antenna module of the present invention includes a first antenna coil for communication with a reader / writer and a second antenna coil for communication with an IC tag on the same substrate. Thus, a space-saving antenna module having both a long communication distance required for the tag function and a wide communication area required for the reader / writer function can be configured.
- the first antenna coil and the second antenna coil are each formed by an air-core coil (loop coil) wound spirally in the plane of the substrate.
- This configuration is advantageous in that one antenna coil is arranged on the inner peripheral side of the other antenna coil.
- the antenna module can be configured.
- another antenna module of the present invention includes a first antenna coil for communication with a reader / writer, a second antenna coil for communication with an IC tag, and the first and second antenna coils on the same substrate. And a signal processing circuit including an IC storage medium storing information communicated through the IC card.
- the first antenna coil and the second antenna coil are each configured by an air-core coil spirally wound in the plane of the substrate, and one of the antenna coils is used. It is advantageous that the signal processing circuit is disposed on the inner peripheral side of the other antenna coil and the signal processing circuit is disposed on the inner peripheral side of the other antenna coil.
- the portable communication terminal of the present invention is a portable communication terminal having an information communication function via a communication network, and has a reader reader on the same substrate.
- An antenna module in which a first antenna coil for communication with an IC tag and a second antenna coil for communication with an IC tag are arranged; and an IC storage for storing information communicated via the first and second antenna coils. And a medium.
- a portable communication terminal having both a tag function and a reader / writer function can be configured.
- a train fare can be paid using the tag function of the terminal,
- the reader writer function can be used to check information such as the balance of the IC tag.
- one antenna module for communication with the reader / writer and the second antenna coil for communication between the first antenna coil and the IC tag can save space and increase the size of the terminal body Can be prevented.
- FIG. 1 is a plan view of an antenna module 1 according to a first embodiment of the present invention.
- FIG. 2 is a sectional view taken along the line [2]-[2] in FIG.
- FIG. 3A and FIG. 3B are enlarged cross-sectional views of a main part for explaining an arrangement mode of the first antenna coil 11 and the second antenna coil 12 of the antenna module 1.
- FIGS. 4A and 4B are enlarged cross-sectional views of a main part illustrating an arrangement of the first antenna coil 11 and the second antenna coil 12 of the antenna module 1.
- FIG. 4A and 4B are enlarged cross-sectional views of a main part illustrating an arrangement of the first antenna coil 11 and the second antenna coil 12 of the antenna module 1.
- FIGS. 5A to 5C are enlarged cross-sectional views of a main part illustrating an arrangement mode of the first antenna coil 11 and the second antenna coil 12 of the antenna module 1. is there.
- FIG. 6 is a side sectional view showing a state in which the magnetic sheet 18 and the metal plate 19 are attached to the antenna module 1 to form a unit.
- FIG. 7 is a schematic diagram illustrating a configuration of a portable communication terminal 20 having an antenna module 1 therein and an operation thereof.
- FIG. 8 is a schematic diagram illustrating the configuration of a portable communication terminal 20 having the antenna module 1 therein and an operation thereof.
- FIG. 9 is a plan view showing a modification of the shape of the second antenna coil 12A of the antenna module 1.
- FIG. 10 is a plan view of an antenna module 2 according to the second embodiment of the present invention.
- FIG. 11 is a sectional view taken along the line [11]-[11] in FIG. 10.
- FIGS. 12A and 12B are side sectional views showing an example of attaching the magnetic sheet 18 to the antenna module 2.
- FIGS. 13A and 13B are side cross-sectional views showing an example of attaching the magnetic sheet 18 and the metal plate 19 to the antenna module 2.
- FIG. 14 is a side sectional view illustrating a modification of the configuration of FIG. 13B.
- FIG. 15 is a plan view illustrating a modified example of the configuration of the base substrate 10 of the antenna module 2.
- FIG. 16 is a side sectional view illustrating another modification of the configuration of FIG. 13B.
- FIG. 17 is a side sectional view illustrating still another modification of the configuration of FIG. 13B.
- FIG. 18 is a side sectional view illustrating still another modification of the configuration in FIG. 13B.
- FIG. 1 and 2 show a configuration of an antenna module 1 according to a first embodiment of the present invention.
- FIG. 1 is a plan view of the antenna module 1
- FIG. 2 is a sectional view taken along the line [2]-[2] in FIG.
- a first antenna coil 11 for communication with a reader / writer and a second antenna coil 12 for communication with an IC tag are arranged and formed on a common base substrate 10. Have been.
- the base substrate 10 is made of an insulating material.
- the base substrate 10 may be made of a rigid (self-supporting) material such as a glass epoxy substrate, or may be made of a flexible material such as polyimide PET or PEN. You may.
- the base substrate 10 includes a large-area coil forming portion 10 a on which the first antenna coil 11 and the second antenna coil 12 are formed, and ends of the first and second antenna coils 11 and 12. And a small-area connecting portion 10b in which an external terminal connecting portion 15 electrically connected to the connecting portion 10b is formed.
- the external terminal connection part 15 is connected to a terminal of an IC chip (not shown) or a terminal on a printed wiring board on which the IC chip is mounted.
- reference numeral 16 denotes a through hole for electrically connecting the front and back of the base substrate 10, and through these, the first and second antenna coils 11 1 and 12 are connected to external terminals. It is connected to the predetermined position of part 15. Further, overcoat materials 14 made of an insulating material are provided on the front and back surfaces of the base substrate 10, respectively.
- the first antenna coil 11 and the second antenna coil 12 are made of a conductive material. It can be composed of a thin metal film such as aluminum, or a printed material of conductive paste. The formation width, formation length, film thickness, or coating thickness of each antenna coil can be appropriately set according to the required communication performance.
- the first and second antenna coils 11 and 12 are formed of air-core coils (loop coils) wound in the plane of the base substrate 10. Although the arrangement relationship between the first antenna coil 11 and the second antenna coil 12 is not particularly limited, in the present embodiment, the second antenna coil 12 is arranged on the inner peripheral side of the first antenna coil 11. are doing.
- the antenna module 1 can be downsized compared to the case where the first and second antenna coils 11 and 12 are juxtaposed.
- the first antenna coil 11 is arranged on the outer peripheral side of the second antenna coil 12 (see FIG. 3A). However, if the required communication performance is different, the second antenna coil 11 Can be arranged on the outer peripheral side of the first antenna coil 11 (see FIG. 4B).
- the antenna shapes of the first antenna coil 11 and the second antenna coil 12 can be appropriately set according to the required communication characteristics, and are not limited to the rectangular shape shown in the figure, but may be other shapes such as a circular shape.
- each of the antenna coils 11 and 12 consists of two turns, but the number of turns is an item that can be set appropriately according to the specifications.
- FIG. 9 shows a modification of the shape of the second antenna coil 12. It is assumed that the second antenna coil 12 A indicated by a broken line in the figure is formed on the back side of the base substrate 10 (the back side of the paper).
- the illustrated second antenna coil 12A has an asymmetric shape in which the spacing and the line width between the windings facing each other across the center thereof are different in one direction. That is, in the second antenna coil 12, in one direction (the horizontal direction in FIG. 9), the interval between the windings and the line width thereof become narrower. And a left portion 12b having a wider line width.
- the magnetic field distribution by the second antenna coil 12 A is different from the symmetrical magnetic field distribution by the first antenna coil 11 in which the line width between the windings is symmetric, and the magnetic field distribution of the second antenna coil 12 A is different.
- the spacing between the windings and the line width are increased.
- the left side 1 2b is asymmetrical with emphasis.
- the second antenna coil 12A in the shape shown in the figure, it is possible to expand the communication area with the IC tag (IC card) and shift the communicable position in one direction. Becomes possible.
- the size of the second antenna coil 12 A can be made smaller than that of the antenna coil on the IC tag side, deterioration of the communication performance can be prevented even if the second antenna coil 12 A is provided on the inner peripheral side of the first antenna coil 11. It does not cause it.
- the first antenna coil 11 is disposed on the communication surface CS side of the antenna module 1 (the front surface side of the base substrate 10), and the second antenna coil 12 is disposed on the side opposite to the communication surface CS of the antenna module 1. (The back side of the base substrate 10) (Figs. 2 and 3A). With this configuration, it is possible to improve the tag function that requires a communication distance.
- the second antenna coil 12 may be placed on the communication surface CS side of the antenna module 1 (Fig. 3B, Fig. 4A, Fig. 4B). ).
- the first antenna coil 11 is placed on the surface of the antenna module 1 opposite to the communication surface CS (Fig. 3B). (Fig. 4A, Fig. 4B).
- the arrangement relationship of the antenna coils 11 and 12 is arbitrary as described above, and it is required to determine which is disposed on the outer peripheral side or the inner peripheral side. It is selected according to the communication performance.
- first antenna coil 11 and the second antenna coil 12 arranged on each surface of the base substrate 10 are arranged so as not to overlap each other in order to avoid magnetic coupling.
- first antenna coil 11 and Z or the second antenna coil 12 formed on the base substrate 10 are not limited to one type each. In other words, it is possible to arrange a plurality of types of first and second antenna coils 11 and 12 so that the same antenna module 1 can communicate with a plurality of types of IC tags or reader / writers having different communication specifications. is there.
- FIG. 5A shows an example in which two types of first antenna coils 11 are arranged on the front side of the base substrate 10 at the outer peripheral portion and the inner peripheral portion, and one type of second antenna coil 12 is disposed therebetween. Is shown.
- FIG.5B shows an example in which two types of first antenna coils 11 are arranged on the front side of base substrate 10 and one type of second antenna coil 12 is arranged on the back side of base substrate 10. I have.
- FIG. 5C two types of second antenna coils 12 are arranged on the front side of the base substrate 10 on the outer peripheral portion and the inner peripheral portion, and one type of the first antenna coil 11 is disposed therebetween. The example of arrangement is shown.
- a first antenna coil 11 for communication with a reader / writer and a second antenna coil 12 for communication with an IC tag are provided on a common base
- the reader / writer function can be configured with one antenna module 1.
- FIGS. 7 and 8 are schematic cross-sectional views of a portable communication terminal 20 equipped with the antenna module 1.
- FIG. The figure shows an example in which the antenna module 1 is mounted on the upper back side of the terminal body 21 of the portable communication terminal 20.
- the terminal main body 21 includes an electronic circuit board 22 and a battery 25 on which a CPU and other electronic components for controlling various functions of the portable communication terminal 20 having an information communication function via a communication network are mounted. Is built in, and a part of its surface is constituted by a display part 23 such as a liquid crystal display.
- communication means including a transmission / reception antenna required for transmitting / receiving information via a communication network, an operation input unit, a microphone and a speed necessary for telephone functions, and the like are provided.
- a magnetic sheet 18 and a metal plate 19 are interposed between the antenna module 1 and the mounting portion of the terminal body 21 from the antenna module 1 side.
- the antenna module 1 by attaching a non-conductive magnetic sheet 18 and a metal plate 19 to the main surface of the antenna module 1 opposite to the communication surface CS, the antenna The module 1, the magnetic sheet 18 and the metal plate 19 are united.
- the magnetic sheet 18 for example, a sheet obtained by mixing a sendust (Fe—Al—Si) powder in a synthetic resin material and processing the sheet into a sheet shape is used.
- a sendust Fe—Al—Si
- F e—Ni sendust
- F Soft magnetic materials such as e_Si—Al—B system, ferrite (Ni—Zn ferrite, Mn—Zn ferrite, etc.), and sintered ferrite are applicable. Can be used depending on the communication performance and application to be used.
- the magnetic sheet 18 is interposed between the antenna module 1 and the metal plate 19, it is possible to avoid deterioration of communication performance due to electromagnetic interference between the antenna module 1 and the metal plate 19, and at the same time, There is an advantage that the gap between the antenna module 1 and the metal plate 19 can be set small.
- the metal plate 19 functions as a shield plate, and is provided to isolate the communication operation of the portable communication terminal 20 from the communication operation of the antenna module 1. As a result, it is possible to prevent the portable communication terminal 20 from malfunctioning or malfunctioning during the communication operation of the antenna module 1, for example.
- the constituent material of the metal plate 19 is not particularly limited as long as it is conductive, and a stainless steel plate, a copper plate, an aluminum plate, or the like is preferable.
- the thickness of the magnetic sheet 18 and the metal plate 19 be finished to such an extent that the whole thickness does not become too large when the magnetic sheet 18 and the metal plate 19 are attached to the antenna module 1.
- the antenna module 1 has a thickness of 300 m
- the magnetic sheet 18 has a thickness of about 500 m
- the metal plate 19 has a thickness of about 300 ⁇ m
- the entire module has a thickness of just over 1 mm. Can be suppressed.
- the antenna module ⁇ 1 can be incorporated into a limited space inside the terminal body 21 without deteriorating the space-saving property of the antenna module ⁇ 1.
- the antenna module 1 is installed in the terminal body 21 with its communication surface CS facing outward. At this time, the external terminal connection part 15 of the antenna module 1 is connected to, for example, an IC chip 24 prepared for the antenna module 1.
- An external reader is connected to the IC chip 24 via the first antenna coil 11
- the ID and other various information that are read when communicating with the writer 5 are stored.
- the IC chip 24 reads or writes information stored in the external IC tag 6. Necessary access procedures (programs) and key information are stored as needed.
- the portable communication terminal 20 of the present embodiment configured as described above, as shown in FIG. 7, when communicating with the external reader / writer 5, the first antenna coil 11 of the antenna module 1 is used.
- the predetermined information stored in the IC chip 24 is transmitted via the. This makes it possible to pay, for example, a train fare using the tag function of the portable communication terminal 20.
- the battery 25 of the portable communication terminal 20 can be used as a power source for using the reader / writer function.
- optimization of the design of the first and second antenna coils can contribute to lower power consumption of the portable communication terminal 20.
- FIGS. 10 and 11 show the configuration of the antenna module 2 according to the second embodiment of the present invention.
- the same reference numerals are given to portions corresponding to the above-described first embodiment, and detailed description thereof will be omitted.
- FIG. 10 is a plan view of the antenna module 2
- FIG. 11 is a cross-sectional view taken along the line [11]-[11] in FIG.
- the antenna module 2 of the present embodiment includes a first antenna coil 11 for communication with a reader / writer, a second antenna coil 12 for communication with an IC tag, And an RFID circuit section 30 including an IC chip 24 storing information communicated via the second antenna coil.
- the RFID circuit section 30 corresponds to the “signal processing circuit” of the present invention, and generates and transmits and receives transmission / reception signals required for communication operations via the first and second antenna coils other than the IC chip 24. It is composed of a set of electronic components to be used for such purposes. The illustration of the wiring pattern for electrically connecting the components is omitted.
- the R FID circuit section 30 is arranged on the inner peripheral side of the second antenna coil 12 in the example of the figure. With this configuration, the inner peripheral portion (air core portion) of the second antenna coil 12 can be effectively used, and the antenna module 2 can be reduced in size.
- the RFID circuit section 30 is disposed on the communication side CS of the antenna module 2 (the front side of the base substrate 10).
- the present invention is not limited to this. May be arranged on the side main surface. If the RFID circuit portion cannot be formed in the inner peripheral area of the second antenna coil 12, the RF antenna is formed on the surface opposite to the surface on which the second antenna coil 12 is formed. It is also possible to form an ID circuit part.
- the RFID circuit unit 30 necessary for communication with the reader / writer or the IC tag is provided on the same base substrate 10 together with the first and second antenna coils 11 and 12. Since it is configured as a board unit arranged above, there is no need to separately prepare a wiring board on which an RFID circuit is formed, and the antenna module can be very excellent in space saving.
- the antenna module 2 of the present embodiment is installed in a portable communication terminal having an information communication function via a communication network, as in the first embodiment.
- the RFID circuit section 30 is unitized as the antenna module 2, this can be implemented without requiring a large spatial space in the terminal body.
- the RFID circuit unit 30 is unitized as the antenna module 2, it is easy to incorporate, add, or delete the RFID function to the portable communication terminal, thereby improving the maintainability and the convenience of after-sales service and the like. Can be.
- the antenna module 2 (1 chip 24) in which personal information such as usage history is stored can be used as is even in a new model terminal.
- security is ensured.
- the base substrate 10 is formed as a coupling structure between the formation area of the antenna coils 11 and 12 and the mounting area of the RFID circuit section 30 so that different types of antenna coils 11 1 , 12 can be connected.
- the base substrate 10 is composed of an annular antenna mounting substrate 10 A on which the first and second antenna coils 11 and 12 are mounted, and an RFI. It is composed of a combination with a circuit mounting board 10 B on which the D circuit section 30 is mounted.
- the electrical connection between the antenna mounting board 1 OA and the circuit mounting board 10 B is made, for example, by using a conductive bonding material such as solder between a plurality of pairs of connection lands 10 AL and 10 BL that are aligned at the time of coupling. Techniques such as bonding and wire bonding between lands can be adopted.
- the same circuit board 10B can be used regardless of the shape of the antenna, and the shape and the like of the circuit board 10B are preferably unified between the modules.
- the desired antenna module can be configured simply by incorporating the common circuit mounting board 10 so that inventory management and production This will also improve the performance.
- the antenna module 2 shown in FIG. 10 when the antenna module 2 shown in FIG. 10 is installed in the terminal main body, as in the first embodiment described above, the main surface of the antenna module 2 opposite to the communication surface CS and the terminal are connected to the terminal. It is preferable that a nonconductive magnetic sheet and a metal plate are interposed between the main body and the mounting portion. The effect obtained by interposing the magnetic sheet and the metal plate is the same as that of the above-described first embodiment, and the description is omitted here.
- FIGS. 12A and 12B are configuration examples in which a magnetic sheet 18 is adhered to the main surface of the antenna module 2 opposite to the communication surface CS.
- FIG. 12A is an example of sticking the magnetic sheet 18 when the RF ID circuit section 30 is arranged on the communication surface CS side of the antenna module 2.
- Fig. 12B shows an example of sticking the magnetic sheet 18 when the RF ID circuit 30 is placed on the main surface of the antenna module 2 opposite to the communication surface CS.
- an opening 18a large enough to accommodate the RF ID circuit section 30 is formed in the center of the magnetic sheet 18. This is because even if the opening 18a is formed in the central region of the module where the antenna coil is not formed, the effect of suppressing the electromagnetic interference by the magnetic sheet 18 can be sufficiently achieved.
- the RFID circuit section 30 can be accommodated in the opening 18a, the total thickness of the module can be reduced as compared with the configuration example of FIG.
- FIGS. 13A and 13B show examples of attaching the metal plate 19.
- FIG. 13A shows an example of attaching a metal plate 19 when the RFID circuit section 30 is arranged on the communication surface CS side of the antenna module 2.
- the metal plate 19 is attached to the antenna module 2 via the magnetic sheet 18.
- FIG. 13B shows an example of attaching the metal plate 19 when the RF ID circuit section 30 is arranged on the main surface of the antenna module 2 opposite to the communication surface CS.
- a metal plate 19 is adhered to the antenna module 2 via a magnetic sheet 18 having an opening 18a large enough to accommodate the RFID circuit section 30 in the center.
- the RF ID circuit section 30 can be accommodated in the opening 18a of the magnetic sheet 18, the total thickness of the module can be reduced as compared with the configuration example of FIG. Can contribute to As shown in FIG. 14, it is also possible to form an opening 19a facing the RFID circuit section 30 in the center of the metal plate 19 as well. In this case, the degree of freedom in the mounting space for the components constituting the RFID circuit unit 30 is increased, and thus components having a relatively large mounting height can be mounted.
- a radio wave absorber is installed on the base substrate 10 of the antenna module 2 so as to cover the RFID circuit 30.
- the base substrate 10 of the antenna module 2 Preferably.
- FIG. 16 shows an example in which the entire R FID circuit section 30 is covered with a flexible sheet-shaped radio wave absorber 31.
- the soft magnetic material forming the radio wave absorber 31 is selected according to the frequency band of the noise radio wave radiated from the RFID circuit section 30.
- a similar radio wave absorber 32 may be attached to the upper surface (non-circuit mounting surface) side of the base substrate 10 to suppress unnecessary radiation to the upper surface of the base substrate. . If a metal layer is additionally provided on the outer surface side of the radio wave absorbers 31 and 32, the noise prevention effect can be further enhanced.
- FIG. 17 shows an example in which the RFID circuit section 30 is sandwiched between a pair of metal plates 35 and 36 from both sides of the base substrate 10 via radio wave absorbers 33 and 34.
- the electromagnetic wave absorbers 33 and 34 can be in the form of a compound, and can be configured by being integrally formed with the base substrate 10 so as to cover the RFID circuit section 30.
- a paste-like thing can be used as the radio wave absorbers 33, 34, and after being applied so as to cover the RFID circuit section 30, a curing process is performed.
- the metal plates 35 and 36 enhance the noise prevention effect, and at the same time, function as a strong plate for protecting the RFID circuit section 30 from external stress.
- FIG. 18 shows another configuration example that can simultaneously protect against unnecessary stress from the RFID circuit section 30 and protect the RFID circuit section 30 from external stress.
- the RFID circuit section 30 is covered with a substantially box-shaped metal cover 37 having a predetermined strength, and a sheet-like radio wave absorber 38 is attached to the inner surface of the force pad 37.
- a radio wave absorber 38 is attached to the inner surface of the force pad 37.
- the internal space of the force par 37 may be filled with a radio wave absorber.
- a radio wave absorber 39 may be provided on the upper surface side of the base substrate 10 corresponding to the area where the RFID circuit section 30 is formed.
- a metal layer may be formed thereon. This metal layer is sufficient in the form of a foil when applied as a noise countermeasure, but a certain thickness is required for the purpose of increasing the strength.
- the meaning of “the radio wave absorber is provided so as to cover the signal processing circuit” in the claims means that the circuit formation area on the circuit mounting surface side of the base substrate 10 and the circuit formation area on the opposite side This means that the electric wave absorber is provided in both or any one of the circuit formation regions.
- the above measures against unnecessary radiation of the RFID circuit section 30 are not limited to being applied only to the antenna module 2 to which the metal plate 19 is adhered. It is also applicable to the configuration example shown in 2B.
- the antenna module 2 has a configuration in which only the magnetic sheet 18 is adhered, but in such a configuration, a metal plate 19 or a member equivalent thereto is provided in advance on the mounting portion side of the terminal body. Can be adopted when Therefore, when the terminal body side is not provided with measures to prevent electromagnetic interference with the RFID circuit section 30, the above-described radio wave absorber can be used to cope with the problem.
- the above-described radio wave absorber covering the RFID circuit section 30 is configured for a purpose different from that of the magnetic sheet 18 attached directly below the first and second antenna coils 11 and 12 of the antenna module 2. Is what is done. That is, the radio wave absorber is provided for the purpose of absorbing the noise component radiated from the RFID circuit section 30, and is formed by selecting a magnetic powder capable of efficiently absorbing the noise band.
- the magnetic sheet 18 is provided mainly for the purpose of giving the antenna module 2 a predetermined communication performance, and the optimum communication performance with respect to the inductance of the antenna coil divided by the communication frequency (for example, (Magnetic permeability etc.) is selected and constituted.
- the base substrate 10 is used as the antenna mounting substrate. Although it was configured as a coupling substrate (see Fig. 15) of 10A and the circuit mounting substrate 10B, it is not limited to this, and when the base substrate 10 is configured as an integrated substrate as shown in Fig. Is similarly applicable.
- the antenna module according to the present invention was applied to a portable communication terminal such as a mobile phone or a PDA.
- a portable communication terminal such as a mobile phone or a PDA.
- the application example is not limited to the above-described portable communication terminal.
- the present invention is applicable to a game machine, a dedicated portable RFID communication device, and the like.
- the IC tag from which information is read out by the second antenna coil of the antenna module according to the present invention is not limited to the above-described IC card, but may be another type of IC tag such as a coin shape and a stick shape. The present invention is applicable.
- first and second antenna coils of the antenna module described in each of the above embodiments have been described as being arranged and formed on a single common base substrate.
- the base substrate according to the present invention can be formed by laminating the first film substrate on which one antenna coil is formed and the second film substrate on which the second antenna coil is formed.
- the first antenna coil for communication with the reader / writer and the second antenna coil for communication with the IC tag are provided on the same substrate. It is possible to construct a space-saving antenna module that has both a long communication distance required for the tag function and a wide communication area required for the reader / writer function ⁇ Further, according to the portable communication terminal of the present invention, a portable communication terminal having both a tag function and a reader / writer function can be configured without increasing the size of the terminal body.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/559,325 US7712672B2 (en) | 2003-06-06 | 2004-06-04 | Antenna module and portable communication terminal equipped with the antenna module |
EP04736114A EP1633017A1 (en) | 2003-06-06 | 2004-06-04 | Antenna module and mobile communication terminal having the same |
AU2004246180A AU2004246180A1 (en) | 2003-06-06 | 2004-06-04 | Antenna module and mobile communication terminal having the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-163055 | 2003-06-06 | ||
JP2003163055A JP2004364199A (ja) | 2003-06-06 | 2003-06-06 | アンテナモジュール及びこれを備えた携帯型通信端末 |
Publications (2)
Publication Number | Publication Date |
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WO2004109852A1 true WO2004109852A1 (ja) | 2004-12-16 |
WO2004109852B1 WO2004109852B1 (ja) | 2005-03-17 |
Family
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Family Applications (1)
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PCT/JP2004/008172 WO2004109852A1 (ja) | 2003-06-06 | 2004-06-04 | アンテナモジュール及びこれを備えた携帯型通信端末 |
Country Status (8)
Country | Link |
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US (1) | US7712672B2 (ja) |
EP (1) | EP1633017A1 (ja) |
JP (1) | JP2004364199A (ja) |
KR (1) | KR20060008332A (ja) |
CN (1) | CN1816945A (ja) |
AU (1) | AU2004246180A1 (ja) |
TW (1) | TWI248699B (ja) |
WO (1) | WO2004109852A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
CN1816945A (zh) | 2006-08-09 |
EP1633017A1 (en) | 2006-03-08 |
US7712672B2 (en) | 2010-05-11 |
JP2004364199A (ja) | 2004-12-24 |
TWI248699B (en) | 2006-02-01 |
KR20060008332A (ko) | 2006-01-26 |
AU2004246180A1 (en) | 2004-12-16 |
US20070095913A1 (en) | 2007-05-03 |
WO2004109852B1 (ja) | 2005-03-17 |
TW200516802A (en) | 2005-05-16 |
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