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WO2015182340A1 - Antenna device and communication terminal device - Google Patents

Antenna device and communication terminal device Download PDF

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Publication number
WO2015182340A1
WO2015182340A1 PCT/JP2015/063174 JP2015063174W WO2015182340A1 WO 2015182340 A1 WO2015182340 A1 WO 2015182340A1 JP 2015063174 W JP2015063174 W JP 2015063174W WO 2015182340 A1 WO2015182340 A1 WO 2015182340A1
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WO
WIPO (PCT)
Prior art keywords
antenna
coil element
circuit
coil
transformer
Prior art date
Application number
PCT/JP2015/063174
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French (fr)
Japanese (ja)
Inventor
金文浩
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to CN201590000546.5U priority Critical patent/CN206194969U/en
Priority to JP2016523398A priority patent/JP6323551B2/en
Publication of WO2015182340A1 publication Critical patent/WO2015182340A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them

Definitions

  • the present invention relates to an antenna device mounted on a small communication terminal device such as a mobile phone terminal and a communication terminal device including the antenna device.
  • IFA Inverted F Antenna
  • PIFA Planar Inverted-F Antenna
  • F antennas are often used.
  • the inverted F antenna has a wide band and a high gain as a built-in antenna, and, like other built-in small antennas, can excite a current in the housing and increase the effective size of the antenna.
  • Patent Document 1 discloses an antenna device that supports multiband by providing a variable frequency antenna circuit in IFA or PIFA.
  • IFA and PIFA have a power supply port to which the power supply circuit is connected and a short-circuit port connected to the ground electrode. Since IFA and PIFA have their short-circuited terminals grounded, their impedance is high for a small size, and it is easy to match the impedance of the feeder circuit. However, the structure in which the short-circuited end is grounded narrows the band where a predetermined gain can be obtained.
  • Patent Document 1 it is possible to design the antenna impedance to have a desired value by providing a frequency adjusting means on the open end side of the inverted F antenna, but there are many design elements and the completion. Long design time is required.
  • An object of the present invention is to provide an antenna device and a communication terminal device including the antenna device that have a reduced frequency characteristic (frequency dependency) compared to inverted F antennas such as IFA and PIFA, and that are simplified in design. There is to do.
  • the antenna device of the present invention An antenna element having a feeding portion and a short-circuit portion; a first coil element having a first end connected to the feeding portion of the antenna element; and a second coil element having a first end connected to the short-circuit portion of the antenna element.
  • a transformer circuit is constituted by the first coil element and the second coil element, a power feeding circuit is connected to the second end of the first coil element, and a ground is connected to the second end of the second coil element.
  • the frequency characteristics (frequency dependence) can be suppressed as compared with the inverted F antennas such as IFA and PIFA, and there are few design elements for adjusting the frequency characteristics, and the time required for the design is reduced. Can be shortened.
  • the first coil element and the second coil element are configured by a laminate of a plurality of base material layers including a base material layer on which a loop-shaped or spiral coil conductor pattern is formed. .
  • the transformer circuit portion can be reduced in size, and a small antenna device can be configured.
  • the coil conductor pattern of the first coil element and the second coil element is preferably a pattern in which the coil opening of the first coil element and the coil opening of the second coil element overlap in plan view.
  • a communication terminal device is an antenna device according to any one of (1) to (3) above, wherein the antenna device is a communication terminal device having a radio communication circuit connected to the antenna device. It is characterized by comprising an apparatus.
  • the antenna device of the present invention it is possible to suppress the frequency characteristic (frequency dependence) as compared with the inverted F antenna such as IFA or PIFA. Moreover, there are few design elements for adjusting the frequency characteristics, and the time required for the design can be shortened. According to the communication terminal device of the present invention, it is possible to perform communication with a high gain over a wide band even though it is a small antenna device.
  • FIG. 1 is a circuit diagram of an antenna device 101 according to the first embodiment.
  • FIG. 2 is an external perspective view of the transformer 2 provided in the antenna device 101.
  • FIG. 3 is a perspective view showing a conductor portion of the transformer 2.
  • FIG. 4 is a cross-sectional view of the transformer 2.
  • FIG. 5A is a diagram in which the inductance between the feeding portion 1F and the short-circuit portion 1S of the antenna element 1 is represented by a lumped constant circuit element L3.
  • FIG. 5B is a diagram illustrating an inverted F antenna including a radiating unit 1R, a power feeding unit 1F, and a short-circuit unit 1S.
  • FIG. 5C is a diagram in which the inductance of the power feeding unit 1F in FIG.
  • FIG. 5B is represented by LA and the inductance of the short circuit unit 1S is represented by LB.
  • 6A is a circuit diagram of the antenna device 101 of the present embodiment
  • FIG. 6B is an equivalent circuit diagram of the antenna device 101.
  • FIG. 6C is another equivalent circuit diagram of the antenna device 101.
  • FIG. 7 is a circuit diagram of the antenna device 102 according to the second embodiment.
  • FIG. 8A is a diagram showing the inductance between the feeding portion 1F and the short-circuit portion 1S of the antenna element 1 shown in FIG. 7 by lumped constant circuit elements L3 and L4.
  • FIG. 8B is a configuration diagram of an antenna device as a comparative example.
  • FIG. 9A and FIG. 9B are plan views showing conductor patterns formed on the printed wiring board 5 and chip components mounted on the printed wiring board 5.
  • FIG. 1 is a circuit diagram of the antenna device according to the first embodiment.
  • the antenna device 101 includes an antenna element 1 and a transformer 2.
  • the antenna element 1 is an antenna element used for cellular communication (UHF band) of a portable communication terminal such as a smartphone.
  • the antenna element 1 includes a short-circuit portion 1S that short-circuits the antenna element 1 at one end, and a power feeding portion 1F that feeds power to a predetermined position of the antenna element 1.
  • Transformer 2 has four ports P1 to P4.
  • the port P1 of the transformer 2 is connected to the power feeding portion 1F of the antenna element 1, and the port P2 is connected to the short-circuit portion 1S of the antenna element 1.
  • the power feeding circuit 3 is connected to the port P3 of the transformer 2, and the port P4 is grounded.
  • the transformer 2 includes a first coil element L1 and a second coil element L2.
  • the first coil element L1 and the second coil element L2 form a transformer circuit by magnetic field coupling.
  • the first coil element L1 and the second coil element L2 are wound and connected so as to strengthen magnetic fluxes.
  • FIG. 2 is an external perspective view of the transformer 2.
  • the transformer 2 is configured integrally with a laminate 20 in which the first coil element L1 and the second coil element L2 are formed by laminating a plurality of dielectric base layers.
  • Four terminals T1 to T4 are formed across the upper and lower surfaces via the side surface of the laminate 20. These terminals T1 to T4 correspond to the ports P1 to P4 shown in FIG.
  • This laminate is preferably a laminate obtained by laminating nonmagnetic base layers.
  • FIG. 3 is a perspective view showing a conductor portion of the transformer 2.
  • FIG. 4 is a cross-sectional view of the transformer 2.
  • FIG. 3 shows an expanded conductor interval (dielectric layer thickness) in the stacking direction in consideration of clarification of the drawing.
  • Conductor patterns 21A, 21B, 22A, 22B and interlayer connection conductors 21C, 22C are formed inside the multilayer body.
  • the conductor pattern 21A, 21B and the interlayer connection conductor 21C constitute a first coil element.
  • the conductor pattern 22A, 22B and the interlayer connection conductor 22C constitute a second coil element.
  • the end of the conductor pattern 21A is connected to the terminal T1, and the end of the conductor pattern 21B is connected to the terminal T3.
  • the end of the conductor pattern 22A is connected to the terminal T2, and the end of the conductor pattern 22B is connected to the terminal T4.
  • a coil (first coil element L1) constituted by the conductor patterns 21A and 21B and the interlayer connection conductor 21C and a coil (second coil element L2) constituted by the conductor patterns 22A and 22B and the interlayer connection conductor 22C are coil windings.
  • the rotation axis is coaxial, and the coils overlap in the thickness direction. That is, the coil conductor patterns of the first coil element and the second coil element are patterns in which the coil opening of the first coil element and the coil opening of the second coil element overlap in plan view.
  • the coil opening of the first coil element and the coil opening of the second coil element overlap with each other in plan view.
  • the state where at least a part overlaps is just to be in the state where at least a part overlaps.
  • FIG. 5A is a diagram in which the inductance between the power feeding portion 1F and the short-circuit portion 1S of the antenna element 1 is represented by a lumped constant circuit element L3.
  • FIG. 5B is a diagram illustrating an inverted F antenna including a radiating unit 1R, a power feeding unit 1F, and a short-circuit unit 1S.
  • FIG. 5C is a diagram in which the inductance of the power feeding unit 1F in FIG. 5B is represented by LA and the inductance of the short circuit unit 1S is represented by LB.
  • the Q value of the antenna is caused by the reactance component of the inductor component. Becomes higher, and the resonance frequency band of the antenna becomes narrower.
  • the first coil element L1 and the second coil element L2 of the transformer 2 are connected to the power feeding section 1F and the short-circuit section 1S of the antenna element 1, so It is possible to avoid the problem of the frequency dependency of the line of the feeding portion and the short-circuit portion of the F antenna. This makes it possible to make a wider band antenna.
  • FIG. 6A is a circuit diagram of the antenna device 101 of the present embodiment
  • FIG. 6B is an equivalent circuit diagram of the antenna device 101.
  • the transformer 2 including the first coil element L1 and the second coil element L2 illustrated in FIG. 6A includes an inductance L3 between the power feeding section 1F and the short-circuit section 1S as illustrated in FIG. 6B. It can be represented by one transformer circuit.
  • the transformer circuit equivalently has a structure as shown in FIG.
  • the antenna device 101 of this embodiment is equivalent to the antenna element 1 and the transformer 2.
  • a reverse F antenna is constructed. According to the present embodiment, since there is no frequency dependence due to the inductance components of the power feeding unit 1F and the short-circuit unit 1S, wideband antenna characteristics can be obtained.
  • FIG. 7 is a circuit diagram of the antenna device according to the second embodiment.
  • the antenna device 102 includes an antenna element 1 and a transformer 2.
  • the antenna element 1 includes a radiating portion 1R, a short-circuit portion (short-circuit line) 1S that short-circuits the radiating portion 1R at one end, and a power feeding portion (feeding line) 1F that feeds power to a predetermined position of the radiating portion 1R. .
  • the antenna element 1 constitutes a part of an inverted F antenna.
  • the configuration of the transformer 2 is basically the same as that of the transformer shown in the first embodiment.
  • FIG. 8A is a diagram showing the inductance between the feeding portion 1F and the short-circuit portion 1S of the antenna element 1 shown in FIG. 7 by lumped constant circuit elements L3 and L4.
  • FIG. 8B is a configuration diagram of an antenna device as a comparative example.
  • the antenna device of this comparative example is configured to feed power to an inverted L-type antenna via a transformer 4.
  • the transformer effect such as impedance conversion by the transformer circuit is obtained by the coupling of the first coil element L1 and the second coil element L2 of the transformer 4. It is difficult to design the coil element L1 and the second coil element L2 to have respective desired inductance values and to obtain a high degree of coupling.
  • the first coil element L1 and the second coil element L2 form an autotransformer circuit having three ports (three terminals), the degree of difficulty in pattern design in the case of being configured in a stacked body is high.
  • the transformer effect of the transformer 2 is that the inductance of the region A and the second coil element L2, and the feeding portion 1F and the first coil element L1. It is determined by the ratio with the inductance. Further, the first coil element L1 and the second coil element L2 constitute a transformer circuit having four ports (four terminals). Therefore, the degree of freedom in pattern design when configuring in the laminate is high, and it is possible to form a pattern that increases the degree of coupling accordingly. Further, when an autotransformer circuit is configured as shown in FIG. 8B, it is very difficult to design the inductances of the first coil element L1 and the second coil element L2 to different values.
  • the transformer ratio can be set with a high degree of freedom. Further, when an autotransformer circuit as shown in FIG. 8B is configured, it is necessary to consider a parallel parasitic inductance component. However, with a 4-port transformer circuit shown in FIG. Since a coil having a high degree of coupling can be formed, the difficulty in design and manufacturing is low.
  • the third embodiment shows an example of a communication terminal device.
  • the communication terminal device according to the present embodiment includes a printed wiring board and a housing that houses the printed wiring board together with other components.
  • FIG. 9A and 9B show the conductor pattern formed on the printed wiring board 5 and the chip components mounted on the printed wiring board 5.
  • FIG. 9A is an antenna device according to this embodiment
  • the antenna device shown in FIG. 9B is an antenna device according to a comparative example.
  • the printed wiring board 5 is formed with a radiation portion 1R, a power feeding portion 1F, and a short-circuit portion 1S.
  • the antenna element 1 is constituted by these conductor patterns.
  • a ground conductor GND and a power supply line FL are formed on the printed wiring board 5.
  • a ground conductor pattern is formed on the back surface or the inner layer of the printed wiring board 5, and the ground conductor pattern and the feed line FL constitute a microstrip line.
  • the power supply line FL is connected to a power supply circuit 3 that is a wireless communication circuit such as an RFIC.
  • An electrode E1 is formed at the end of the power supply unit 1F, and an electrode E2 is formed at the end of the short-circuit unit 1S.
  • An electrode E3 is formed at the end of the power supply line FL, and an electrode E4 is formed at a part of the ground conductor GND.
  • the transformer 2 shown in FIG. 9A is a transformer having terminals T1 to T4, and the basic configuration is as shown in FIGS. Terminals T1 to T4 of the transformer 2 are connected to the electrodes E1 to E4.
  • FIG. 9B which is a comparative example, the jumper component 6 is connected between the electrodes E1-E3 on the printed wiring board 5, and the jumper component 6 is connected between the electrodes E2-E4. Therefore, the antenna device of this comparative example constitutes an inverted F antenna.
  • both an antenna device that feeds power through a transformer as shown in FIG. 9A and an inverted F antenna as shown in FIG. 9B can be configured.
  • the antenna element 1 or the radiating portion 1R is illustrated as being linear in the drawing, but these may be flat.
  • the transformer 2 is configured by laminating a dielectric base material layer on which a looped or spiral coil conductor pattern is formed. It may be a magnetic material.
  • the antenna element is exemplified as an antenna element for cellular communication, it may be used as an antenna element for wireless LAN or Bluetooth (registered trademark).

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Abstract

An antenna device which is provided with: an antenna element (1) that has a feed part (1F) and a short-circuit part (1S); a first coil element (L1) that is connected between a feed circuit (3) and the feed part (1F) of the antenna element (1); and a second coil element (L2) that is connected between the short-circuit part (1S) of the antenna element (1) and the ground. A transformer (2) is configured of the first coil element (L1) and the second coil element (L2).

Description

アンテナ装置および通信端末装置Antenna device and communication terminal device
　本発明は、携帯電話端末などの小型の通信端末装置に搭載されるアンテナ装置およびそのアンテナ装置を備えた通信端末装置に関する。 The present invention relates to an antenna device mounted on a small communication terminal device such as a mobile phone terminal and a communication terminal device including the antenna device.
　最近の小型の通信端末装置のアンテナには、線状逆Ｆアンテナ（以下、IFA；Inverted F Antenna という。）や板状逆Ｆアンテナ（以下、PIFA；Planar Inverted-F Antenna という。）等の逆Ｆアンテナが良く用いられる。逆Ｆアンテナは、内蔵アンテナとしては広帯域で利得が高く、他の内蔵小型アンテナと同様に、筐体に電流を励振させ、アンテナの実効的な寸法を大きくできる。例えば特許文献１には、IFAまたはPIFAに周波数可変アンテナ回路を設けることで、マルチバンドに対応させたアンテナ装置が示されている。 As the antenna of a recent small communication terminal device, the reverse of a linear inverted F antenna (hereinafter referred to as IFA; Inverted F Antenna) or a plate-like inverted F antenna (hereinafter referred to as PIFA; Planar Inverted-F Antenna). F antennas are often used. The inverted F antenna has a wide band and a high gain as a built-in antenna, and, like other built-in small antennas, can excite a current in the housing and increase the effective size of the antenna. For example, Patent Document 1 discloses an antenna device that supports multiband by providing a variable frequency antenna circuit in IFA or PIFA.
国際公開第２０１１／０５９０８８号International Publication No. 2011/059088
　IFAやPIFAは、給電回路が接続される給電ポートと、グランド電極に接続される短絡ポートとを備えている。IFAやPIFAは、その短絡端が接地されていることにより、小型の割にはインピーダンスが高く、給電回路のインピーダンスと整合させやすい。しかし、短絡端を接地する構造により、所定利得が得られる帯域を狭くしてしまう。 IFA and PIFA have a power supply port to which the power supply circuit is connected and a short-circuit port connected to the ground electrode. Since IFA and PIFA have their short-circuited terminals grounded, their impedance is high for a small size, and it is easy to match the impedance of the feeder circuit. However, the structure in which the short-circuited end is grounded narrows the band where a predetermined gain can be obtained.
　また、特許文献１に示されているように、逆Ｆアンテナの開放端側に周波数調整手段を設けることで、アンテナのインピーダンスが所望の値となるように設計できるが、設計要素が多く、完成まで長い設計時間が必要になる。 Further, as shown in Patent Document 1, it is possible to design the antenna impedance to have a desired value by providing a frequency adjusting means on the open end side of the inverted F antenna, but there are many design elements and the completion. Long design time is required.
　本発明の目的は、IFAやPIFA等の逆Ｆアンテナに比べて周波数特性（周波数依存性）を小さくし、しかも設計上の簡素化を図った、アンテナ装置およびそれを備えた通信端末装置を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide an antenna device and a communication terminal device including the antenna device that have a reduced frequency characteristic (frequency dependency) compared to inverted F antennas such as IFA and PIFA, and that are simplified in design. There is to do.
（１）本発明のアンテナ装置は、
　給電部と短絡部を有するアンテナ素子と、アンテナ素子の給電部に第１端が接続された第１コイル素子と、アンテナ素子の短絡部に第１端が接続された第２コイル素子と、を備え、第１コイル素子と第２コイル素子とでトランス回路が構成され、第１コイル素子の第２端に給電回路が接続され、第２コイル素子の第２端にグランドが接続されることを特徴とする。 (1) The antenna device of the present invention
An antenna element having a feeding portion and a short-circuit portion; a first coil element having a first end connected to the feeding portion of the antenna element; and a second coil element having a first end connected to the short-circuit portion of the antenna element. A transformer circuit is constituted by the first coil element and the second coil element, a power feeding circuit is connected to the second end of the first coil element, and a ground is connected to the second end of the second coil element. Features.
　上記構成によれば、IFAやPIFA等の逆Ｆアンテナに比べて、周波数特性（周波数依存性）を抑えることができ、また、周波数特性を調整するための設計要素が少なく、設計に要する時間が短縮化できる。 According to the above configuration, the frequency characteristics (frequency dependence) can be suppressed as compared with the inverted F antennas such as IFA and PIFA, and there are few design elements for adjusting the frequency characteristics, and the time required for the design is reduced. Can be shortened.
（２）前記第１コイル素子および前記第２コイル素子は、ループ状またはスパイラル状のコイル導体パターンが形成された基材層を含む複数の基材層の積層体で構成されていることが好ましい。このことにより、トランス回路部分を小型化でき、小型のアンテナ装置が構成できる。 (2) It is preferable that the first coil element and the second coil element are configured by a laminate of a plurality of base material layers including a base material layer on which a loop-shaped or spiral coil conductor pattern is formed. . Thus, the transformer circuit portion can be reduced in size, and a small antenna device can be configured.
（３）前記第１コイル素子および前記第２コイル素子の前記コイル導体パターンは、第１コイル素子のコイル開口と第２コイル素子のコイル開口とが平面視で重なるようなパターンであることが好ましい。このことにより、小型でありながら、第１コイル素子と第２コイル素子との結合度の高いトランス回路が構成できる。 (3) The coil conductor pattern of the first coil element and the second coil element is preferably a pattern in which the coil opening of the first coil element and the coil opening of the second coil element overlap in plan view. . Thus, a transformer circuit having a high degree of coupling between the first coil element and the second coil element can be configured while being small.
（４）本発明の通信端末装置は、アンテナ装置、当該アンテナ装置に接続された無線通信回路を有する通信端末装置において、前記アンテナ装置を上記（１）～（３）のいずれかに記載のアンテナ装置で構成することを特徴とする。 (4) A communication terminal device according to the present invention is an antenna device according to any one of (1) to (3) above, wherein the antenna device is a communication terminal device having a radio communication circuit connected to the antenna device. It is characterized by comprising an apparatus.
　上記構成によれば、小型のアンテナ装置でありながら、広帯域に亘って高利得のもとでの通信が可能となる。 According to the above configuration, it is possible to perform communication with a high gain over a wide band while being a small antenna device.
　本発明のアンテナ装置によれば、IFAやPIFA等の逆Ｆアンテナに比べて、周波数特性（周波数依存性）を抑えることができる。また、周波数特性を調整するための設計要素が少なく、設計に要する時間が短縮化できる。本発明の通信端末装置によれば、小型のアンテナ装置でありながら、広帯域に亘って高利得のもとでの通信が可能となる。 According to the antenna device of the present invention, it is possible to suppress the frequency characteristic (frequency dependence) as compared with the inverted F antenna such as IFA or PIFA. Moreover, there are few design elements for adjusting the frequency characteristics, and the time required for the design can be shortened. According to the communication terminal device of the present invention, it is possible to perform communication with a high gain over a wide band even though it is a small antenna device.
図１は第１の実施形態に係るアンテナ装置１０１の回路図である。FIG. 1 is a circuit diagram of an antenna device 101 according to the first embodiment. 図２は、アンテナ装置１０１が備えているトランス２の外観斜視図である。FIG. 2 is an external perspective view of the transformer 2 provided in the antenna device 101. 図３はトランス２の導体部分を示す透視斜視図である。FIG. 3 is a perspective view showing a conductor portion of the transformer 2. 図４はトランス２の断面図である。FIG. 4 is a cross-sectional view of the transformer 2. 図５（Ａ）は、アンテナ素子１の給電部１Ｆと短絡部１Ｓとの間のインダクタンスを集中定数回路素子Ｌ３で表した図である。図５（Ｂ）は、放射部１Ｒ、給電部１Ｆおよび短絡部１Ｓで構成される逆Ｆアンテナを表す図である。図５（Ｃ）は、図５（Ｂ）における給電部１ＦのインダクタンスをＬＡ、短絡部１ＳのインダクタンスをＬＢ、で表した図である。FIG. 5A is a diagram in which the inductance between the feeding portion 1F and the short-circuit portion 1S of the antenna element 1 is represented by a lumped constant circuit element L3. FIG. 5B is a diagram illustrating an inverted F antenna including a radiating unit 1R, a power feeding unit 1F, and a short-circuit unit 1S. FIG. 5C is a diagram in which the inductance of the power feeding unit 1F in FIG. 5B is represented by LA and the inductance of the short circuit unit 1S is represented by LB. 図６（Ａ）は本実施形態のアンテナ装置１０１の回路図、図６（Ｂ）はアンテナ装置１０１の等価回路図である。図６（Ｃ）はアンテナ装置１０１の別の等価回路図である。6A is a circuit diagram of the antenna device 101 of the present embodiment, and FIG. 6B is an equivalent circuit diagram of the antenna device 101. FIG. 6C is another equivalent circuit diagram of the antenna device 101. 図７は第２の実施形態に係るアンテナ装置１０２の回路図である。FIG. 7 is a circuit diagram of the antenna device 102 according to the second embodiment. 図８（Ａ）は、図７に示した、アンテナ素子１の給電部１Ｆと短絡部１Ｓとの間のインダクタンスを集中定数回路素子Ｌ３，Ｌ４で表した図である。図８（Ｂ）は比較例としてのアンテナ装置の構成図である。FIG. 8A is a diagram showing the inductance between the feeding portion 1F and the short-circuit portion 1S of the antenna element 1 shown in FIG. 7 by lumped constant circuit elements L3 and L4. FIG. 8B is a configuration diagram of an antenna device as a comparative example. 図９（Ａ）および図９（Ｂ）は、プリント配線板５に形成された導体パターンと、そのプリント配線板５に実装されたチップ部品を示す平面図である。FIG. 9A and FIG. 9B are plan views showing conductor patterns formed on the printed wiring board 5 and chip components mounted on the printed wiring board 5.
《第１の実施形態》
　図１は第１の実施形態に係るアンテナ装置の回路図である。このアンテナ装置１０１はアンテナ素子１とトランス２とで構成されている。 << First Embodiment >>
FIG. 1 is a circuit diagram of the antenna device according to the first embodiment. The antenna device 101 includes an antenna element 1 and a transformer 2.
　アンテナ素子１は、たとえばスマートフォンのような携帯型の通信端末のセルラー通信（UHF帯）に利用されるアンテナ素子である。このアンテナ素子１は、このアンテナ素子１を一方の端部で短絡させる短絡部１Ｓと、アンテナ素子１の所定位置に給電する給電部１Ｆとを備える。 The antenna element 1 is an antenna element used for cellular communication (UHF band) of a portable communication terminal such as a smartphone. The antenna element 1 includes a short-circuit portion 1S that short-circuits the antenna element 1 at one end, and a power feeding portion 1F that feeds power to a predetermined position of the antenna element 1.
　トランス２は４つのポートＰ１～Ｐ４を備えている。このトランス２のポートＰ１はアンテナ素子１の給電部１Ｆに接続されていて、ポートＰ２はアンテナ素子１の短絡部１Ｓに接続されている。トランス２のポートＰ３には給電回路３が接続されていて、ポートＰ４は接地されている。 Transformer 2 has four ports P1 to P4. The port P1 of the transformer 2 is connected to the power feeding portion 1F of the antenna element 1, and the port P2 is connected to the short-circuit portion 1S of the antenna element 1. The power feeding circuit 3 is connected to the port P3 of the transformer 2, and the port P4 is grounded.
　トランス２は第１コイル素子Ｌ１と第２コイル素子Ｌ２を備えている。第１コイル素子Ｌ１と第２コイル素子Ｌ２は磁界結合することでトランス回路を構成している。第１コイル素子Ｌ１と第２コイル素子Ｌ２とは磁束を強め合うように巻回・接続されている。 The transformer 2 includes a first coil element L1 and a second coil element L2. The first coil element L1 and the second coil element L2 form a transformer circuit by magnetic field coupling. The first coil element L1 and the second coil element L2 are wound and connected so as to strengthen magnetic fluxes.
　図２は上記トランス２の外観斜視図である。トランス２は、上記第１コイル素子Ｌ１および第２コイル素子Ｌ２が複数の誘電体の基材層を積層してなる積層体２０に一体的に構成されている。積層体２０の側面を経由して上下面に亘って４つの端子Ｔ１～Ｔ４が形成されている。これら端子Ｔ１～Ｔ４は、図１に示したポートＰ１～Ｐ４に対応する。この積層体は、非磁性体の基材層を積層してなる積層体であることが好ましい。 FIG. 2 is an external perspective view of the transformer 2. The transformer 2 is configured integrally with a laminate 20 in which the first coil element L1 and the second coil element L2 are formed by laminating a plurality of dielectric base layers. Four terminals T1 to T4 are formed across the upper and lower surfaces via the side surface of the laminate 20. These terminals T1 to T4 correspond to the ports P1 to P4 shown in FIG. This laminate is preferably a laminate obtained by laminating nonmagnetic base layers.
　図３はトランス２の導体部分を示す透視斜視図である。図４はトランス２の断面図である。但し、図３は、図の明瞭化を考慮して、積層方向の導体間隔（誘電体層の厚み）を拡張して表している。積層体の内部には導体パターン２１Ａ，２１Ｂ，２２Ａ，２２Ｂおよび層間接続導体２１Ｃ，２２Ｃが形成されている。導体パターン２１Ａ，２１Ｂおよび層間接続導体２１Ｃによって第１コイル素子が構成されている。また、導体パターン２２Ａ，２２Ｂおよび層間接続導体２２Ｃによって第２コイル素子が構成されている。導体パターン２１Ａの端部は端子Ｔ１に接続されていて、導体パターン２１Ｂの端部は端子Ｔ３に接続されている。導体パターン２２Ａの端部は端子Ｔ２に接続されていて、導体パターン２２Ｂの端部は端子Ｔ４に接続されている。 FIG. 3 is a perspective view showing a conductor portion of the transformer 2. FIG. 4 is a cross-sectional view of the transformer 2. However, FIG. 3 shows an expanded conductor interval (dielectric layer thickness) in the stacking direction in consideration of clarification of the drawing. Conductor patterns 21A, 21B, 22A, 22B and interlayer connection conductors 21C, 22C are formed inside the multilayer body. The conductor pattern 21A, 21B and the interlayer connection conductor 21C constitute a first coil element. The conductor pattern 22A, 22B and the interlayer connection conductor 22C constitute a second coil element. The end of the conductor pattern 21A is connected to the terminal T1, and the end of the conductor pattern 21B is connected to the terminal T3. The end of the conductor pattern 22A is connected to the terminal T2, and the end of the conductor pattern 22B is connected to the terminal T4.
　導体パターン２１Ａ，２１Ｂおよび層間接続導体２１Ｃによって構成されるコイル（第１コイル素子Ｌ１）と導体パターン２２Ａ，２２Ｂおよび層間接続導体２２Ｃによって構成されるコイル（第２コイル素子Ｌ２）とは、コイル巻回軸が同軸であり、且つコイル同士が厚み方向に重なっている。すなわち、第１コイル素子および第２コイル素子のコイル導体パターンは、第１コイル素子のコイル開口と第２コイル素子のコイル開口とが平面視で重なるようなパターンである。この構造によって、第１コイル素子Ｌ１と第２コイル素子Ｌ２とは互いに強く磁界結合する。 A coil (first coil element L1) constituted by the conductor patterns 21A and 21B and the interlayer connection conductor 21C and a coil (second coil element L2) constituted by the conductor patterns 22A and 22B and the interlayer connection conductor 22C are coil windings. The rotation axis is coaxial, and the coils overlap in the thickness direction. That is, the coil conductor patterns of the first coil element and the second coil element are patterns in which the coil opening of the first coil element and the coil opening of the second coil element overlap in plan view. With this structure, the first coil element L1 and the second coil element L2 are strongly magnetically coupled to each other.
　なお、第１コイル素子Ｌ１と第２コイル素子Ｌ２との結合度の点では、第１コイル素子のコイル開口と第２コイル素子のコイル開口とが、平面視で全体に重なっていることが好ましいが、少なくとも一部が重なっている状態であればよい。 In terms of the degree of coupling between the first coil element L1 and the second coil element L2, it is preferable that the coil opening of the first coil element and the coil opening of the second coil element overlap with each other in plan view. However, what is necessary is just to be in the state where at least a part overlaps.
　以降、本実施形態のアンテナ装置１０１において、トランス２の作用について説明する。 Hereinafter, the operation of the transformer 2 in the antenna device 101 of the present embodiment will be described.
　図５（Ａ）は、アンテナ素子１の給電部１Ｆと短絡部１Ｓとの間のインダクタンスを集中定数回路素子Ｌ３で表した図である。一方、図５（Ｂ）は、放射部１Ｒ、給電部１Ｆおよび短絡部１Ｓで構成される逆Ｆアンテナを表す図である。 FIG. 5A is a diagram in which the inductance between the power feeding portion 1F and the short-circuit portion 1S of the antenna element 1 is represented by a lumped constant circuit element L3. On the other hand, FIG. 5B is a diagram illustrating an inverted F antenna including a radiating unit 1R, a power feeding unit 1F, and a short-circuit unit 1S.
　図５（Ｂ）に示すように、逆Ｆアンテナは、給電部１Ｆのライン、短絡部１Ｓのラインは等価回路上でインダクタンス成分として見なすことができる。図５（Ｃ）は、図５（Ｂ）における給電部１ＦのインダクタンスをＬＡ、短絡部１ＳのインダクタンスをＬＢ、で表した図である。しかし、この図５（Ｃ）に示すように、逆Ｆアンテナにおける給電部と短絡部のインダクタンス成分を集中定数回路のインダクタ部品で構成すると、インダクタ部品が持っているリアクタンス成分によって、アンテナのＱ値が高くなってしまい、アンテナの共振周波数帯域が狭くなる。 As shown in FIG. 5B, in the inverted F antenna, the line of the power feeding unit 1F and the line of the short circuit unit 1S can be regarded as inductance components on the equivalent circuit. FIG. 5C is a diagram in which the inductance of the power feeding unit 1F in FIG. 5B is represented by LA and the inductance of the short circuit unit 1S is represented by LB. However, as shown in FIG. 5C, when the inductance components of the power feeding portion and the short-circuit portion in the inverted-F antenna are configured by the inductor component of the lumped constant circuit, the Q value of the antenna is caused by the reactance component of the inductor component. Becomes higher, and the resonance frequency band of the antenna becomes narrower.
　本実施形態によれば、図５（Ａ）に示すとおり、アンテナ素子１の給電部１Ｆと短絡部１Ｓにトランス２の第１コイル素子Ｌ１および第２コイル素子Ｌ２を接続したので、従来の逆Ｆアンテナの給電部のラインや短絡部のラインが有する周波数依存性の問題を回避できる。そのことにより、より広帯域なアンテナを作ることが可能になる。 According to the present embodiment, as shown in FIG. 5A, the first coil element L1 and the second coil element L2 of the transformer 2 are connected to the power feeding section 1F and the short-circuit section 1S of the antenna element 1, so It is possible to avoid the problem of the frequency dependency of the line of the feeding portion and the short-circuit portion of the F antenna. This makes it possible to make a wider band antenna.
　図６（Ａ）は本実施形態のアンテナ装置１０１の回路図、図６（Ｂ）はアンテナ装置１０１の等価回路図である。図６（Ａ）に示す、第１コイル素子Ｌ１と第２コイル素子Ｌ２によるトランス２は、図６（Ｂ）に示すように、給電部１Ｆと短絡部１Ｓとの間のインダクタンスＬ３を含めて１つのトランス回路で表すことができる。このトランス回路の相互誘導インダクタンスをＭで表すと、上記トランス回路は、等価的には図６（Ｃ）に示すとおりの構造となる。 6A is a circuit diagram of the antenna device 101 of the present embodiment, and FIG. 6B is an equivalent circuit diagram of the antenna device 101. The transformer 2 including the first coil element L1 and the second coil element L2 illustrated in FIG. 6A includes an inductance L3 between the power feeding section 1F and the short-circuit section 1S as illustrated in FIG. 6B. It can be represented by one transformer circuit. When the mutual induction inductance of the transformer circuit is represented by M, the transformer circuit equivalently has a structure as shown in FIG.
　図６（Ｃ）に示した等価回路は図５（Ｂ）（Ｃ）に示した回路と基本的に同じあるので、本実施形態のアンテナ装置１０１は、アンテナ素子１とトランス２とで等価的な逆Ｆアンテナを構成する。本実施形態によれば、給電部１Ｆと短絡部１Ｓのインダクタンス成分による周波数依存性が無いので、広帯域なアンテナ特性が得られる。 Since the equivalent circuit shown in FIG. 6C is basically the same as the circuit shown in FIGS. 5B and 5C, the antenna device 101 of this embodiment is equivalent to the antenna element 1 and the transformer 2. A reverse F antenna is constructed. According to the present embodiment, since there is no frequency dependence due to the inductance components of the power feeding unit 1F and the short-circuit unit 1S, wideband antenna characteristics can be obtained.
《第２の実施形態》
　図７は第２の実施形態に係るアンテナ装置の回路図である。このアンテナ装置１０２はアンテナ素子１とトランス２とで構成されている。アンテナ素子１は、放射部１Ｒと、この放射部１Ｒを一方の端部で短絡させる短絡部（短絡線）１Ｓと、放射部１Ｒの所定位置に給電する給電部（給電線）１Ｆとを備える。アンテナ素子１は逆Ｆアンテナの一部を構成している。トランス２の構成は、第１の実施形態で示したトランスと基本的に同様である。 << Second Embodiment >>
FIG. 7 is a circuit diagram of the antenna device according to the second embodiment. The antenna device 102 includes an antenna element 1 and a transformer 2. The antenna element 1 includes a radiating portion 1R, a short-circuit portion (short-circuit line) 1S that short-circuits the radiating portion 1R at one end, and a power feeding portion (feeding line) 1F that feeds power to a predetermined position of the radiating portion 1R. . The antenna element 1 constitutes a part of an inverted F antenna. The configuration of the transformer 2 is basically the same as that of the transformer shown in the first embodiment.
　図８（Ａ）は、図７に示した、アンテナ素子１の給電部１Ｆと短絡部１Ｓとの間のインダクタンスを集中定数回路素子Ｌ３，Ｌ４で表した図である。一方、図８（Ｂ）は比較例としてのアンテナ装置の構成図である。この比較例のアンテナ装置は、逆Ｌ型アンテナにトランス４を介して給電するように構成されている。 FIG. 8A is a diagram showing the inductance between the feeding portion 1F and the short-circuit portion 1S of the antenna element 1 shown in FIG. 7 by lumped constant circuit elements L3 and L4. On the other hand, FIG. 8B is a configuration diagram of an antenna device as a comparative example. The antenna device of this comparative example is configured to feed power to an inverted L-type antenna via a transformer 4.
　図８（Ｂ）に示す比較例のアンテナ装置においては、トランス４の第１コイル素子Ｌ１と第２コイル素子Ｌ２との結合によって、トランス回路によるインピーダンス変換等のトランス効果が得られるが、第１コイル素子Ｌ１および第２コイル素子Ｌ２を、それぞれの所望のインダクタンス値にして且つ高い結合度を得るように設計することは難易度が高い。また、第１コイル素子Ｌ１と第２コイル素子Ｌ２とが３つのポート（３端子）のオートトランス回路を構成するので、積層体内に構成する場合のパターン設計の難易度が高い。 In the antenna device of the comparative example shown in FIG. 8B, the transformer effect such as impedance conversion by the transformer circuit is obtained by the coupling of the first coil element L1 and the second coil element L2 of the transformer 4. It is difficult to design the coil element L1 and the second coil element L2 to have respective desired inductance values and to obtain a high degree of coupling. In addition, since the first coil element L1 and the second coil element L2 form an autotransformer circuit having three ports (three terminals), the degree of difficulty in pattern design in the case of being configured in a stacked body is high.
　これに対し、図８（Ａ）に示す本実施形態のアンテナ装置１０２においては、トランス２のトランス効果は、領域Ａおよび第２コイル素子Ｌ２のインダクタンスと、給電部１Ｆおよび第１コイル素子Ｌ１のインダクタンスとの比率で決まる。また、第１コイル素子Ｌ１と第２コイル素子Ｌ２とが４つのポート（４端子）のトランス回路を構成する。そのため、積層体内に構成する場合のパターン設計の自由度が高く、その分、結合度を上げるパターンに形成することが可能になる。また、図８（Ｂ）に示すようにオートトランス回路を構成する場合、第１コイル素子Ｌ１と第２コイル素子Ｌ２のインダクタンスを異なる値に設計することは非常に難易度が高いが、図８（Ａ）のように、アンテナ素子１の一部である並列リアクタンス成分を利用することで、トランス比を高い自由度のもとで設定できるようになる。さらに、図８（Ｂ）に示すようなオートトランス回路を構成すると、並列寄生インダクタンス成分を考慮する必要があるが、図８（Ａ）に示す４ポートトランス回路であれば、より簡素な構造で、高い結合度を持ったコイルを形成することができるので、設計上および製造上の難易度が低い。 On the other hand, in the antenna device 102 according to the present embodiment shown in FIG. 8A, the transformer effect of the transformer 2 is that the inductance of the region A and the second coil element L2, and the feeding portion 1F and the first coil element L1. It is determined by the ratio with the inductance. Further, the first coil element L1 and the second coil element L2 constitute a transformer circuit having four ports (four terminals). Therefore, the degree of freedom in pattern design when configuring in the laminate is high, and it is possible to form a pattern that increases the degree of coupling accordingly. Further, when an autotransformer circuit is configured as shown in FIG. 8B, it is very difficult to design the inductances of the first coil element L1 and the second coil element L2 to different values. By using the parallel reactance component that is a part of the antenna element 1 as shown in (A), the transformer ratio can be set with a high degree of freedom. Further, when an autotransformer circuit as shown in FIG. 8B is configured, it is necessary to consider a parallel parasitic inductance component. However, with a 4-port transformer circuit shown in FIG. Since a coil having a high degree of coupling can be formed, the difficulty in design and manufacturing is low.
《第３の実施形態》
　第３の実施形態では通信端末装置の例を示す。本実施形態の通信端末装置は、プリント配線板と、このプリント配線板を他の部品とともに収納する筐体とを備えている。 << Third Embodiment >>
The third embodiment shows an example of a communication terminal device. The communication terminal device according to the present embodiment includes a printed wiring board and a housing that houses the printed wiring board together with other components.
　図９（Ａ）（Ｂ）は、プリント配線板５に形成された導体パターンと、そのプリント配線板５に実装されたチップ部品を示している。図９（Ａ）に示すアンテナ装置は本実施形態に係るアンテナ装置であり、図９（Ｂ）に示すアンテナ装置は比較例に係るアンテナ装置である。 9A and 9B show the conductor pattern formed on the printed wiring board 5 and the chip components mounted on the printed wiring board 5. FIG. The antenna device shown in FIG. 9A is an antenna device according to this embodiment, and the antenna device shown in FIG. 9B is an antenna device according to a comparative example.
　図９（Ａ）（Ｂ）に表れているように、プリント配線板５に、放射部１Ｒ、給電部１Ｆおよび短絡部１Ｓが形成されている。これらの導体パターンによってアンテナ素子１が構成されている。また、プリント配線板５にグランド導体ＧＮＤおよび給電ラインＦＬが形成されている。プリント配線板５の裏面または内層にはグランド導体パターンが形成されていて、このグランド導体パターンと給電ラインＦＬとでマイクロストリップラインが構成されている。給電ラインＦＬには、ＲＦＩＣ等による無線通信回路である給電回路３が接続されている。 As shown in FIGS. 9A and 9B, the printed wiring board 5 is formed with a radiation portion 1R, a power feeding portion 1F, and a short-circuit portion 1S. The antenna element 1 is constituted by these conductor patterns. A ground conductor GND and a power supply line FL are formed on the printed wiring board 5. A ground conductor pattern is formed on the back surface or the inner layer of the printed wiring board 5, and the ground conductor pattern and the feed line FL constitute a microstrip line. The power supply line FL is connected to a power supply circuit 3 that is a wireless communication circuit such as an RFIC.
　給電部１Ｆの端部には電極Ｅ１、短絡部１Ｓの端部には電極Ｅ２がそれぞれ形成されている。また、給電ラインＦＬの端部に電極Ｅ３、グランド導体ＧＮＤの一部に電極Ｅ４がそれぞれ形成されている。 An electrode E1 is formed at the end of the power supply unit 1F, and an electrode E2 is formed at the end of the short-circuit unit 1S. An electrode E3 is formed at the end of the power supply line FL, and an electrode E4 is formed at a part of the ground conductor GND.
　図９（Ａ）に示すトランス２は端子Ｔ１～Ｔ４を有するトランスであり、基本的な構成は図２～図４に示したとおりである。トランス２の端子Ｔ１～Ｔ４は上記電極Ｅ１～Ｅ４に接続されている。 The transformer 2 shown in FIG. 9A is a transformer having terminals T1 to T4, and the basic configuration is as shown in FIGS. Terminals T1 to T4 of the transformer 2 are connected to the electrodes E1 to E4.
　比較例である図９（Ｂ）においては、プリント配線板５上の電極Ｅ１－Ｅ３間にジャンパ部品６が接続されていて、電極Ｅ２－Ｅ４間にジャンパ部品６が接続されている。したがって、この比較例のアンテナ装置は逆Ｆアンテナを構成することになる。 In FIG. 9B, which is a comparative example, the jumper component 6 is connected between the electrodes E1-E3 on the printed wiring board 5, and the jumper component 6 is connected between the electrodes E2-E4. Therefore, the antenna device of this comparative example constitutes an inverted F antenna.
　このように、同じプリント配線板５を用いて、図９（Ａ）に示したようなトランスを介して給電するアンテナ装置と、図９（Ｂ）に示した逆Ｆアンテナのいずれも構成できる。 Thus, using the same printed wiring board 5, both an antenna device that feeds power through a transformer as shown in FIG. 9A and an inverted F antenna as shown in FIG. 9B can be configured.
　なお、以上に示した各実施形態では、アンテナ素子１または放射部１Ｒが図面上は線状である例を示したが、これらは平板状であってもよい。 In each of the embodiments described above, the antenna element 1 or the radiating portion 1R is illustrated as being linear in the drawing, but these may be flat.
　また、以上に示した各実施形態では、アンテナ素子１または放射部１Ｒの端部が開放されている例を示したが、アンテナ素子１または放射部１Ｒの端部とグランド導体とに間にキャパシタが接続（容量が装荷）されていてもよい。 In each of the embodiments described above, an example in which the end of the antenna element 1 or the radiating portion 1R is opened has been described. However, a capacitor is interposed between the end of the antenna element 1 or the radiating portion 1R and the ground conductor. May be connected (capacity loaded).
　また、以上に示した各実施形態では、ループ状またはスパイラル状のコイル導体パターンが形成された誘電体の基材層を積層してトランス２を構成したが、基材層は一部または全部が磁性体であってもよい。 Further, in each of the embodiments described above, the transformer 2 is configured by laminating a dielectric base material layer on which a looped or spiral coil conductor pattern is formed. It may be a magnetic material.
　また、アンテナ素子をセルラー通信用のアンテナ素子として例示したが、無線LANやBluetooth（登録商標)用のアンテナ素子として利用してもよい。 Further, although the antenna element is exemplified as an antenna element for cellular communication, it may be used as an antenna element for wireless LAN or Bluetooth (registered trademark).
Ａ…領域
Ｅ１～Ｅ４…電極
ＦＬ…給電ライン
ＧＮＤ…グランド導体
Ｌ１…第１コイル素子
Ｌ２…第２コイル素子
Ｌ３，Ｌ４…集中定数回路素子
Ｐ１～Ｐ４…ポート
Ｔ１～Ｔ４…端子
１…アンテナ素子
１Ｆ…給電部
１Ｒ…放射部
１Ｓ…短絡部
２…トランス
３…給電回路
４…トランス
５…プリント配線板
６…ジャンパ部品
２０…積層体
２１Ａ，２１Ｂ，２２Ａ，２２Ｂ…導体パターン
２１Ｃ，２２Ｃ…層間接続導体
１０１，１０２…アンテナ装置 A ... regions E1-E4 ... electrode FL ... feed line GND ... ground conductor L1 ... first coil element L2 ... second coil elements L3, L4 ... lumped constant circuit elements P1-P4 ... ports T1-T4 ... terminal 1 ... antenna element DESCRIPTION OF SYMBOLS 1F ... Feed part 1R ... Radiation part 1S ... Short-circuit part 2 ... Transformer 3 ... Feed circuit 4 ... Transformer 5 ... Printed wiring board 6 ... Jumper component 20 ... Laminate 21A, 21B, 22A, 22B ... Conductor pattern 21C, 22C ... Interlayer Connection conductors 101, 102 ... antenna device

Claims (4)

  1. 　給電部と短絡部を有するアンテナ素子と、
    　前記アンテナ素子の給電部に第１端が接続された第１コイル素子と、
    　前記アンテナ素子の短絡部に第１端が接続された第２コイル素子と、を備え、
    　前記第１コイル素子と前記第２コイル素子とでトランス回路が構成され、
    　前記第１コイル素子の第２端に給電回路が接続され、前記第２コイル素子の第２端にグランドが接続されるアンテナ装置。     An antenna element having a feeding portion and a short-circuit portion;
    A first coil element having a first end connected to a feeding portion of the antenna element;
    A second coil element having a first end connected to the short-circuit portion of the antenna element,
    A transformer circuit is configured by the first coil element and the second coil element,
    An antenna device in which a power feeding circuit is connected to a second end of the first coil element, and a ground is connected to a second end of the second coil element.
  2. 　前記第１コイル素子および前記第２コイル素子は、ループ状またはスパイラル状のコイル導体パターンが形成された基材層を含む複数の基材層の積層体で構成されている、請求項１に記載のアンテナ装置。 The said 1st coil element and the said 2nd coil element are comprised by the laminated body of the several base material layer containing the base material layer in which the loop-shaped or spiral coil conductor pattern was formed. Antenna device.
  3. 　前記第１コイル素子および前記第２コイル素子の前記コイル導体パターンは、前記第１コイル素子のコイル開口と前記第２コイル素子のコイル開口とが、平面視で重なるパターンである、請求項２に記載のアンテナ装置。 The coil conductor pattern of the first coil element and the second coil element is a pattern in which a coil opening of the first coil element and a coil opening of the second coil element overlap in a plan view. The antenna device described.
  4. 　アンテナ装置、当該アンテナ装置に接続された無線通信回路を有する通信端末装置において、
    　前記アンテナ装置は、請求項１～３のいずれかに記載のアンテナ装置である、通信端末装置。     In an antenna device, a communication terminal device having a wireless communication circuit connected to the antenna device,
    The communication terminal apparatus, wherein the antenna apparatus is the antenna apparatus according to any one of claims 1 to 3.
PCT/JP2015/063174 2014-05-28 2015-05-07 Antenna device and communication terminal device WO2015182340A1 (en)

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WO2018101285A1 (en) * 2016-11-29 2018-06-07 株式会社村田製作所 Magnetic field coupling element, antenna device, and electronic instrument
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JPWO2019208044A1 (en) * 2018-04-25 2020-10-01 株式会社村田製作所 Antenna device and communication terminal device
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