WO2005088771A1 - Antenna and electronic equipment using the same - Google Patents

Antenna and electronic equipment using the same Download PDF

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Publication number
WO2005088771A1
WO2005088771A1 PCT/JP2004/003280 JP2004003280W WO2005088771A1 WO 2005088771 A1 WO2005088771 A1 WO 2005088771A1 JP 2004003280 W JP2004003280 W JP 2004003280W WO 2005088771 A1 WO2005088771 A1 WO 2005088771A1
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WO
WIPO (PCT)
Prior art keywords
antenna
antenna element
linear
tubular portion
power supply
Prior art date
Application number
PCT/JP2004/003280
Other languages
French (fr)
Japanese (ja)
Inventor
Misako Sakae
Tzortzakakis Michail
Original Assignee
Matsushita Electric Industrial Co., Ltd.
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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to DE112004000520T priority Critical patent/DE112004000520T5/en
Priority to PCT/JP2004/003280 priority patent/WO2005088771A1/en
Publication of WO2005088771A1 publication Critical patent/WO2005088771A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • 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
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole

Definitions

  • the present invention relates to a built-in antenna and an electronic device using the same.
  • the conventional built-in antenna that is often used has an inverted F type as shown in Fig.5.
  • the inverted-F antenna includes a ground plane 104, a short-circuit section 102 that short-circuits the ground plane 104 and the radiation element 101, and a feed section 103 that supplies power to the antenna. It is configured.
  • Such an antenna is disclosed, for example, in Japanese Patent Application Laid-Open No. H08-228303.
  • the inverted-F antenna has a narrow frequency band and can be used only at a single frequency.
  • the band is to be widened, it is necessary to increase the distance between the radiating element 101 and the ground plane 104, or to increase the size of the radiating element 101 itself. Therefore, it is extremely difficult to achieve both miniaturization and broadband. Disclosure of the invention
  • the antenna according to the present invention has a first antenna element, a second antenna element, and a linear element.
  • the first antenna element has a cylindrical portion.
  • the first end of the second antenna element is open.
  • the linear element is insulated along the cylindrical portion of the first antenna element and is connected to the end of the first antenna element.
  • the second end of the second antenna element is connected to the linear element.
  • the first antenna element and the second antenna element enable an antenna operation in multiband.
  • the linear element the size and bandwidth can be increased.
  • Such antennas can be used in small electronic devices. It is suitable to be built in. Brief Description of Drawings
  • FIG. 1 is a block diagram of a mobile phone as an electronic device according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view showing the arrangement of the antenna and the electronic device according to the embodiment of the present invention.
  • FIG. 3 is an exploded perspective view of the antenna according to the embodiment of the present invention.
  • FIG. 4 is an exploded perspective view of another antenna according to the embodiment of the present invention.
  • FIG. 5 is a perspective view of a conventional antenna. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 shows an electric circuit of a mobile phone as an example of an electronic device according to an embodiment of the present invention.
  • Antenna 1 is connected to transmission line 3 and reception line 4 via antenna duplexer 2.
  • Antenna duplexer 2 includes a transmission filter 5 and a reception filter 6.
  • the radio signal received by antenna 1 is transmitted to reception line 4 via antenna duplexer 2.
  • Transmission signals such as voice are transmitted from the antenna 1 via the transmission line 3 and the antenna duplexer 2.
  • the receiving line 4 is connected to a speaker 12 via an amplifier 7, an interstage filter 8, a mixer 9, an IF filter 10 and a demodulator 11.
  • the transmission line 3 is provided with a modulator 14, a mixer 15, an interstage filter 16, an amplifier 17, and an isolator 18 in that order from the microphone 13, and the isolator 18 is connected to the antenna duplexer 2. It is connected.
  • a voltage-controlled oscillator (VC ⁇ ) 19 is connected to mixers 9 and 15 via filters 20 and 21, respectively.
  • FIG. 2 specifically shows this electric circuit as a configuration diagram.
  • the components of the transmission line 3 and the reception line 4 from the antenna duplexer 2 to the demodulator 11 or the modulator 14 shown in Fig. 1 are printed circuit board 2 2 on the transmission / reception circuit section 23.
  • a signal line 24 is provided from the transmission / reception circuit section 23, and a power supply terminal 25 is connected to the signal line 24.
  • the power supply terminal 25 is provided between the antenna 1 and the antenna duplexer 2 in FIG.
  • the power supply lead 32 of the antenna 1 is electrically connected to the power supply terminal 25 on the printed circuit board 22 and is arranged at a fixed distance from the printed circuit board 22.
  • FIG. 3 shows a configuration of the antenna 1 according to the present embodiment.
  • the antenna 1 is composed of a first antenna element (hereinafter, element) 30, an antenna core (hereinafter, core) 31, a power supply lead 32, a linear element (hereinafter, element) 33, and a second element.
  • the element 30 has a shape in which one side surface of a square tubular portion 30A formed of a copper plate is cut out.
  • the core 31 is made of an insulator, and the element 30 is provided on the outer peripheral portion of the rectangular parallelepiped.
  • the power supply lead 32 is electrically connected to the end of the element 30.
  • a spring material or the like may be provided instead of the power supply lead 32, a surface that stands upright from the substrate 22 may be provided on the power supply terminal 25, and the element 30 and the power supply terminal 25 may be connected by a panel material.
  • the feed end, which is the side end of the element 30, and the element 33 are electrically and mechanically connected.
  • the spiral element 34 has a first end open and a second end electrically and mechanically connected to the element 33.
  • the core 31 is made of, for example, a resin such as ABS, phenol, and polycarbonate.
  • Elements 33 and 34 are made of copper wire or copper foil.
  • the element 30 and the element 34 basically function as antennas.
  • the element 30 adjusts the length and thickness of the copper plate and the width of the slit
  • the element 34 adjusts the width and length of the copper wire and the helical spacing, for example, in the 900 MHz band and 1.0 MHz band, respectively. Resonates with 9 GHz band.
  • the element 30 has a square cylindrical portion 30 B that is closed so as to surround the outer periphery of the core 31, and the element 33 is formed by an insulator 35. Insulated.
  • the insulator 35 reliably insulates the tubular portion 30B from the element 33.
  • the element 33 connected to the second end of the element 34 is connected to the end of the element 30 while being insulated from the element 30.
  • the element 30 and the element 34 are supplied with power, respectively, and can resonate at a plurality of frequencies.
  • the element 30 and the element 34 are independent elements, it is easy to adjust the respective vibration frequencies.
  • the element 33 and the element 34 are electrically and mechanically connected, the element 33 and the element 34 are equivalent to the same element. Therefore, the element 34 can be shortened, and the helical interval between the elements 34 can be widened. As a result, the antenna 1 shown in FIG. 3 has a small size and a wide band.
  • the core 31 supports the elements 30, 33, and 34. As a result, the shapes of the elements 30 and 34 are maintained, and the elements function stably as antennas.
  • the core 31 is made of an insulator. Further, the core 31 may be made of a dielectric material or a magnetic material. By using a dielectric or magnetic material, the wavelength of the antenna is shortened, and the antenna becomes more compact.
  • the core 31 is formed in a rectangular parallelepiped shape, but is not limited thereto, and may be a cylindrical shape or another polygonal column shape. However, in order to be mounted on an electronic device, it is preferable to have at least a flat surface.
  • the antenna according to the present invention has a first antenna element, a second antenna element, and a linear element.
  • the first antenna element has a cylindrical portion.
  • the first end of the second antenna element is open.
  • the linear element is arranged along the tubular portion of the first antenna element while being insulated, and is connected to the end of the first antenna element.
  • the second end of the second antenna element is connected to the linear element.
  • the first antenna element and the second antenna element enable an antenna function in multiband. Also, by providing the linear element, the size and the bandwidth can be reduced. By using this antenna, a small electronic device can be provided.

Abstract

An antenna, comprising a first antenna element, a second antenna element, and a linear element. The first antenna element further comprises a tubular part. The second antenna element is opened at the first end thereof. The linear element is disposed, in an insulated state, along the tubular part of the first antenna element, and connected to the end part of the first antenna element. The second end of the second antenna element is connected to the linear element. The antenna can perform multiple band antenna action, can be reduced in size, and can be used for wider bands. The antenna can be suitably incorporated in small electronic equipment.

Description

明細書  Specification
アンテナとそれを用いた電子機器 技術分野  Antennas and electronic devices using them
本発明は内蔵型のアンテナとそれを用いた電子機器に関する。 背景技術  The present invention relates to a built-in antenna and an electronic device using the same. Background art
よく用いられている従来の内蔵アンテナは図 5 に示すような逆 F 型をしている。 逆 F型アンテナは、 地板 1 0 4 と、 地板 1 0 4 と放 射エレメント 1 0 1 との間を短絡する短絡部 1 0 2 と、 アンテナに 電力を供給するための給電部 1 0 3から構成されている。 このよう なアンテナは、 例えば、 特開平 1 一 2 2 8 3 0 3号公報に開示され ている。  The conventional built-in antenna that is often used has an inverted F type as shown in Fig.5. The inverted-F antenna includes a ground plane 104, a short-circuit section 102 that short-circuits the ground plane 104 and the radiation element 101, and a feed section 103 that supplies power to the antenna. It is configured. Such an antenna is disclosed, for example, in Japanese Patent Application Laid-Open No. H08-228303.
しかしながら、 逆 F型アンテナは周波数帯域が狭く、 かつ単独の 周波数でのみしか使用できない。 また、 帯域を広く しょう とすると 放射エレメント 1 0 1 と地板 1 0 4 との間の距離を長く したり、 放 射エレメント 1 0 1そのものの形状を大型にする必要がある。 その ため小型化と広帯域化の両立は極めて難しい。 発明の開示  However, the inverted-F antenna has a narrow frequency band and can be used only at a single frequency. In addition, if the band is to be widened, it is necessary to increase the distance between the radiating element 101 and the ground plane 104, or to increase the size of the radiating element 101 itself. Therefore, it is extremely difficult to achieve both miniaturization and broadband. Disclosure of the invention
本発明のアンテナは、 第 1 のアンテナエレメントと、 第 2のアン テナエレメントと、 線状エレメントとを有する。 第 1 のアンテナェ レメントは、 筒状部を有する。 第 2のアンテナエレメントは第 1端 が開放されている。 線状エレメントは第 1 のアンテナエレメントの 筒状部に沿って、 絶縁されつつ配置され、 第 1 のアンテナエレメン トの端部に接続している。 第 2のアンテナエレメントの第 2端は線 状エレメントに接続している。 このアンテナでは、 第 1 のアンテナ エレメン トと、 第 2のアンテナエレメントとによりマルチバン ドで のアンテナ作用が可能である。 また、 線状エレメントを設けること で小型 ' 広帯域化される。 このようなアンテナは小型な電子機器に 内蔵して好適である。 図面の簡単な説明 The antenna according to the present invention has a first antenna element, a second antenna element, and a linear element. The first antenna element has a cylindrical portion. The first end of the second antenna element is open. The linear element is insulated along the cylindrical portion of the first antenna element and is connected to the end of the first antenna element. The second end of the second antenna element is connected to the linear element. In this antenna, the first antenna element and the second antenna element enable an antenna operation in multiband. In addition, by providing the linear element, the size and bandwidth can be increased. Such antennas can be used in small electronic devices. It is suitable to be built in. Brief Description of Drawings
図 1 は本発明の実施の形態に よる電子機器である携帯電話のプロ ック図である。  FIG. 1 is a block diagram of a mobile phone as an electronic device according to an embodiment of the present invention.
図 2は本発明の実施の形態に よるアンテナと電子機器との配置を 示す分解斜視図である  FIG. 2 is an exploded perspective view showing the arrangement of the antenna and the electronic device according to the embodiment of the present invention.
図 3は本発明の実施の形態に よるアンテナの分解斜視図である。 図 4は本発明の実施の形態に よる他のアンテナの分解斜視図であ る。  FIG. 3 is an exploded perspective view of the antenna according to the embodiment of the present invention. FIG. 4 is an exploded perspective view of another antenna according to the embodiment of the present invention.
図 5は従来のアンテナの斜視図である。 発明を実施するための最良の形態  FIG. 5 is a perspective view of a conventional antenna. BEST MODE FOR CARRYING OUT THE INVENTION
図 1 は本発明の実施の形態による電子機器の一例として、 携帯電 話の電気回路を示している。 アンテナ 1 はアンテナ共用器 2 を介し て送信ライン 3 と受信ライン 4 とに接続されている。 アンテナ共用 器 2は、 送信フィルタ 5 と受信フィルタ 6 とを含んでいる。. アンテ ナ 1で受信された電波の信号は、 アンテナ共用器 2 を介して受信ラ イン 4に伝達される。 また音声などの送信信号は送信ライン 3、 ァ ンテナ共用器 2 を介してアンテナ 1から送信される。  FIG. 1 shows an electric circuit of a mobile phone as an example of an electronic device according to an embodiment of the present invention. Antenna 1 is connected to transmission line 3 and reception line 4 via antenna duplexer 2. Antenna duplexer 2 includes a transmission filter 5 and a reception filter 6. The radio signal received by antenna 1 is transmitted to reception line 4 via antenna duplexer 2. Transmission signals such as voice are transmitted from the antenna 1 via the transmission line 3 and the antenna duplexer 2.
受信ライン 4には増幅器 7、 段間フィル夕 8、 ミキサ 9 、 I Fフ ィル夕 1 0、 復調器 1 1 を介してスピーカ 1 2が接続されている。 また、 送信ライン 3 には、 マイク 1 3から順に変調器 1 4、 ミキサ 1 5、 段間フィルタ 1 6、 増幅器 1 7、 アイソレータ 1 8が設けら れ、 アイソレー夕 1 8はアンテナ共用器 2 に接続されている。 また ミキサ 9， 1 5 には電圧制御発振器 （ V C〇） 1 9が、 それぞれフ ィル夕 2 0 , 2 1 を介して接続されている。  The receiving line 4 is connected to a speaker 12 via an amplifier 7, an interstage filter 8, a mixer 9, an IF filter 10 and a demodulator 11. The transmission line 3 is provided with a modulator 14, a mixer 15, an interstage filter 16, an amplifier 17, and an isolator 18 in that order from the microphone 13, and the isolator 18 is connected to the antenna duplexer 2. It is connected. A voltage-controlled oscillator (VC〇) 19 is connected to mixers 9 and 15 via filters 20 and 21, respectively.
図 2はこの電気回路を具体的に構成図として示している。 図 1 に 示すアンテナ共用器 2から復調器 1 1、 あるいは変調器 1 4までの 送信ライン 3、 受信ライン 4のそれぞれの部品は、 プリント基板 2 2上の送受信回路部 2 3 に構成されている。 送受信回路部 2 3から 信号ライン 2 4が設けられ、 信号ライン 2 4には給電端子 2 5が接 続されている。 給電端子 2 5は図 1 においてアンテナ 1 とアンテナ 共用器 2 との間に設けられている。 アンテナ 1 の給電リ一ド 3 2が プリ ント基板 2 2上の給電端子 2 5 に電気的に接続され、 プリント 基板 2 2から一定距離をおいて配置されている。 FIG. 2 specifically shows this electric circuit as a configuration diagram. The components of the transmission line 3 and the reception line 4 from the antenna duplexer 2 to the demodulator 11 or the modulator 14 shown in Fig. 1 are printed circuit board 2 2 on the transmission / reception circuit section 23. A signal line 24 is provided from the transmission / reception circuit section 23, and a power supply terminal 25 is connected to the signal line 24. The power supply terminal 25 is provided between the antenna 1 and the antenna duplexer 2 in FIG. The power supply lead 32 of the antenna 1 is electrically connected to the power supply terminal 25 on the printed circuit board 22 and is arranged at a fixed distance from the printed circuit board 22.
図 3は、 本実施の形態によるアンテナ 1 の構成を示す。 アンテナ 1は、 第 1 のアンテナェレメン ト (以下、 エレメント） 3 0 とアン テナコア部（以下コア） 3 1 と給電リード 3 2 と線状エレメント （以 下、 エレメント） 3 3 と第 2のアンテナエレメント （以下、 エレメ ント） 3 4とを有する。 エレメント 3 0は銅板で形成された四角い 筒状部 3 0 Aの一側面を切り欠いた形状である。 コア 3 1 は絶縁体 からなり、 エレメント 3 0が直方体の外周部分に設けられている。 給電リード 3 2はエレメント 3 0の端部に電気的に接続されている。 なお、 給電リード 3 2の代わりにバネ材などを設け、 給電端子 2 5 に基板 2 2から直立する面を設けて、 パネ材によりエレメント 3 0 と給電端子 2 5 とを接続してもよい。 エレメント 3 0の側端部であ る給電端とエレメント 3 3 とは、 電気的機械的に接続されている。 螺旋状のエレメント 3 4は第 1端が開放されるとともに第 2端がェ レメント 3 3に電気的機械的に接続されている。  FIG. 3 shows a configuration of the antenna 1 according to the present embodiment. The antenna 1 is composed of a first antenna element (hereinafter, element) 30, an antenna core (hereinafter, core) 31, a power supply lead 32, a linear element (hereinafter, element) 33, and a second element. Antenna element (hereinafter, element) 34. The element 30 has a shape in which one side surface of a square tubular portion 30A formed of a copper plate is cut out. The core 31 is made of an insulator, and the element 30 is provided on the outer peripheral portion of the rectangular parallelepiped. The power supply lead 32 is electrically connected to the end of the element 30. Note that a spring material or the like may be provided instead of the power supply lead 32, a surface that stands upright from the substrate 22 may be provided on the power supply terminal 25, and the element 30 and the power supply terminal 25 may be connected by a panel material. The feed end, which is the side end of the element 30, and the element 33 are electrically and mechanically connected. The spiral element 34 has a first end open and a second end electrically and mechanically connected to the element 33.
コア 3 1 は例えば A B S、 フエノール、 ポリカーボネート等の樹 脂などで形成されている。 エレメント 3 3、 3 4は銅線もしくは銅 箔等で形成されている。  The core 31 is made of, for example, a resin such as ABS, phenol, and polycarbonate. Elements 33 and 34 are made of copper wire or copper foil.
上記構成において、 エレメント 3 0 とエレメント 3 4は基本的に アンテナとしての働きをしている。 エレメント 3 0は銅板の長さや 厚み、 スリ ッ トの幅を調整し、 エレメント 3 4は銅線の幅や長さ、 螺旋間隔などを調整することでそれぞれ例えば 9 0 0 M H z帯と 1 . 9 G H z帯とに共振する。  In the above configuration, the element 30 and the element 34 basically function as antennas. The element 30 adjusts the length and thickness of the copper plate and the width of the slit, and the element 34 adjusts the width and length of the copper wire and the helical spacing, for example, in the 900 MHz band and 1.0 MHz band, respectively. Resonates with 9 GHz band.
図 4では、 エレメント 3 0がコア 3 1 の外周を囲むように閉じた 四角い筒状部 3 0 Bを有し、 エレメント 3 3 とは絶縁体 3 5 によつ て絶縁されている。 絶縁体 3 5は筒状部 3 0 B とエレメント 3 3 と を確実に絶縁する。 またこのようにエレメント 3 0 を環状にするこ とで、 エレメン ト 3 0 の長さが等価的に長くなり、 結果としてエレ メント 3 0の長手方向の長さを短くすることが可能となる。 これに よりエレメント 3 4の占有スペースが大きくなり螺旋状のエレメン ト間隔を広げることができるため、 より小型で広帯域なアンテナが 得られる。 In FIG. 4, the element 30 has a square cylindrical portion 30 B that is closed so as to surround the outer periphery of the core 31, and the element 33 is formed by an insulator 35. Insulated. The insulator 35 reliably insulates the tubular portion 30B from the element 33. Further, by making the element 30 annular like this, the length of the element 30 is equivalently increased, and as a result, the length of the element 30 in the longitudinal direction can be reduced. As a result, the space occupied by the elements 34 is increased, and the interval between the spiral elements can be increased, so that a smaller and wider-band antenna can be obtained.
本実施の形態では、 エレメント 3 4の第 2端に接続されたエレメ ント 3 3が、 エレメン ト 3 0 とは絶縁された状態でエレメント 3 0 の端部に接続されている。 この構成によって、 エレメント 3 0 とェ レメント 3 4とは、 それぞれ給電され、 複数の周波数での共振を可 能となる。 またエレメント 3 0 とエレメント 3 4 とは独立したエレ メントであるので、 それぞれの振周波数を調整しやすい。 またエレ メント 3 3 とエレメント 3 4 とが電気的機械的に接続されることに より、 エレメン ト 3 3 とエレメント 3 4とは同一のエレメントと等 価となる。 そのためエレメント 3 4を短くすることが可能となり、 エレメント 3 4の螺旋間隔を広くすることができ、 結果的に図 3 に 示すアンテナ 1 は小型 · 広帯域になる。  In the present embodiment, the element 33 connected to the second end of the element 34 is connected to the end of the element 30 while being insulated from the element 30. With this configuration, the element 30 and the element 34 are supplied with power, respectively, and can resonate at a plurality of frequencies. Further, since the element 30 and the element 34 are independent elements, it is easy to adjust the respective vibration frequencies. Further, since the element 33 and the element 34 are electrically and mechanically connected, the element 33 and the element 34 are equivalent to the same element. Therefore, the element 34 can be shortened, and the helical interval between the elements 34 can be widened. As a result, the antenna 1 shown in FIG. 3 has a small size and a wide band.
なお、 本実施の形態において、 コア 3 1はエレメン ト 3 0 , 3 3 , 3 4を支持している。 これによりエレメン ト 3 0 , 3 4の形状が保 たれ、 安定してアンテナとして作用する。 またコア 3 1 は絶縁体で 構成されている。 さ らに、 コア 3 1 を誘電体もしく は磁性体で構成 してもよい。 誘電体や磁性体を用いることによってアンテナとして 波長が短縮され、 一層アンテナが小型になる。 またコア 3 1 は直方 体形状に構成しているが、 これに限定されず、 円柱形でも他の多角 柱形状でもよい。 しかし電子機器に搭載するためには、 少なく とも 平面を有することが好ましい。  In the present embodiment, the core 31 supports the elements 30, 33, and 34. As a result, the shapes of the elements 30 and 34 are maintained, and the elements function stably as antennas. The core 31 is made of an insulator. Further, the core 31 may be made of a dielectric material or a magnetic material. By using a dielectric or magnetic material, the wavelength of the antenna is shortened, and the antenna becomes more compact. The core 31 is formed in a rectangular parallelepiped shape, but is not limited thereto, and may be a cylindrical shape or another polygonal column shape. However, in order to be mounted on an electronic device, it is preferable to have at least a flat surface.
以上のような構成により、 図 1 に示す携帯電話を一例とした電子 機器が小型化される。 産業上の利用可能性 With the above-described configuration, the size of an electronic device such as the mobile phone illustrated in FIG. Industrial applicability
本発明のアンテナは、 第 1 のアンテナエレメントと、 第 2のアン テナエレメントと、 線状エレメントとを有する。 第 1 のアンテナェ レメントは、 筒状部を有する。 第 2のアンテナエレメントは第 1端 が開放されている。 線状エレメントは第 1 のアンテナエレメントの 筒状部に沿って、 絶縁されつつ配置され、 第 1 のアンテナエレメン トの端部に接続している。 第 2のアンテナエレメントの第 2端は線 状エレメントに接続している。 このアンテナでは、 第 1 のアンテナ エレメントと、 第 2のアンテナエレメントとによりマルチバンドで のアンテナ作用が可能である。 また、 線状エレメントを設けること で小型 ， 広帯域化される。 このアンテナを用いることで小型な電子 機器を提供することができる。  The antenna according to the present invention has a first antenna element, a second antenna element, and a linear element. The first antenna element has a cylindrical portion. The first end of the second antenna element is open. The linear element is arranged along the tubular portion of the first antenna element while being insulated, and is connected to the end of the first antenna element. The second end of the second antenna element is connected to the linear element. In this antenna, the first antenna element and the second antenna element enable an antenna function in multiband. Also, by providing the linear element, the size and the bandwidth can be reduced. By using this antenna, a small electronic device can be provided.

Claims

請求の範囲 The scope of the claims
1 . 筒状部を有する第 1 のアンテナエレメン トと、 1. a first antenna element having a tubular portion;
第 1端が開放された第 2のアンテナエレメントと、  A second antenna element having a first end open;
前記第 1 のアンテナエレメントの前記筒状部に沿って配置さ れ、 前記第 1 のアンテナエレメントの前記筒状部と絶縁され、 前記 第 1 のアンテナエレメントの端部に接続されるとともに前記第 2の アンテナエレメントの第 2端と接続された線状エレメントと、 を備 えた、  The first antenna element is disposed along the tubular portion of the first antenna element, is insulated from the tubular portion of the first antenna element, is connected to an end of the first antenna element, and is connected to the second antenna element. A linear element connected to the second end of the antenna element of
アンテナ。  antenna.
2 . 前記第 1 のアンテナエレメントと前記第 2 のアンテナエレメン トとが外周部分に設けられたアンテナコア部と、 をさらに備えた、 請求項 1記載のアンテナ。 2. The antenna according to claim 1, further comprising: an antenna core portion provided with an outer peripheral portion of the first antenna element and the second antenna element.
3 . 前記アンテナコア部が、 誘電体と磁性体とのいずれかで構成 された、 3. The antenna core is made of one of a dielectric material and a magnetic material,
請求項 2記載のアンテナ。  The antenna according to claim 2.
4 . 前記第 1 のアンテナエレメン トの給電端に接続された給電リ —ドと、 をさらに備えた、 4. A power supply lead connected to a power supply end of the first antenna element, further comprising:
請求項 1記載のアンテナ。  The antenna according to claim 1.
5 . 前記第 1 のアンテナエレメントの前記筒状部の一部が切り欠 かれ、 前記線状エレメントが前記第 1 のアンテナエレメントの切り 欠かれた部分に配置された、 5. A part of the tubular portion of the first antenna element is cut out, and the linear element is disposed in the cut out part of the first antenna element.
請求項 1記載のアンテナ。  The antenna according to claim 1.
6 . 前記第 1 のアンテナエレメン トの前記筒状部と前記線状エレ メントとを絶縁する絶縁体をさ らに備えた、 請求項 1記載のアンテナ。 前記第 1 のアンテナエレメントの前記筒状部が環状に閉じた、 請求項 6記載のアンテナ 6. The insulator further insulates the cylindrical portion of the first antenna element from the linear element, The antenna according to claim 1. The antenna according to claim 6, wherein the tubular portion of the first antenna element is closed in an annular shape.
■: ■:
8 記第 2のアンテナエレメントが螺旋状である、  8 The second antenna element is spiral,
求項 1記載のアンテナ。  The antenna of claim 1.
9 筒状部を有する第 1 のアンテナエレメントと. 、 9 with a first antenna element having a tubular part,
第 1端が開放された第 2のアンテナエレメン と. 、 前記第 1 のアンテナエレメン トに沿って配置され 、 前 記第 1のアンテナエレメントの前記筒状部と絶縁され 、 刖記 第 1 のアンテナエレメントの端部に接続されるととちに前記 第 2のアンテナエレメントの第 2端と接続された線状 Xレメ ントと、 を有するアンテナと、  A second antenna element having a first end opened; and a second antenna element disposed along the first antenna element and insulated from the tubular portion of the first antenna element. An antenna having a linear X-element connected to an end of the element and connected to a second end of the second antenna element; and
記アンテナと接続された送信ラインと受信ラインとの少な The transmission line and reception line connected to the antenna
< と ¾ 一方と、 を備えた、 With <and ¾
電子機器。  Electronics.
PCT/JP2004/003280 2004-03-12 2004-03-12 Antenna and electronic equipment using the same WO2005088771A1 (en)

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