JP4229772B2 - Portable wireless communication device - Google Patents

Portable wireless communication device Download PDF

Info

Publication number
JP4229772B2
JP4229772B2 JP2003196646A JP2003196646A JP4229772B2 JP 4229772 B2 JP4229772 B2 JP 4229772B2 JP 2003196646 A JP2003196646 A JP 2003196646A JP 2003196646 A JP2003196646 A JP 2003196646A JP 4229772 B2 JP4229772 B2 JP 4229772B2
Authority
JP
Japan
Prior art keywords
short
wireless communication
substrate
portable wireless
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP2003196646A
Other languages
Japanese (ja)
Other versions
JP2005033551A (en
Inventor
晃一 佐藤
浩 渡邊
聡 溝口
隆 天野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP2003196646A priority Critical patent/JP4229772B2/en
Publication of JP2005033551A publication Critical patent/JP2005033551A/en
Application granted granted Critical
Publication of JP4229772B2 publication Critical patent/JP4229772B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Support Of Aerials (AREA)
  • Transceivers (AREA)
  • Details Of Aerials (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は携帯無線通信装置に係り、特に2筐体が連結部を介して開閉可能に連結されて構成された携帯無線通信装置に関する。
【0002】
【従来の技術】
携帯無線通信装置に多く用いられるホイップ型やヘリカル型のアンテナにおいては、放射パターンがアンテナの伸長方向に垂直な面内で無指向性であるために、使用者の方向にも放射電磁界が形成されて放射効率を低下させるという問題がある。この点を改善するため、アンテナ素子に無給電素子を近接させて配置するという発明がなされている(例えば、特許文献1参照。)。この特許文献1に開示された発明は、アンテナ素子よりも0.01λ(λは波長)乃至0.1λだけ長い無給電素子を、0.01λ乃至0.1λの距離を置いて配置することによって、アンテナ素子によリ形成される放射電磁界の指向性を改善し、使用者の方向に形成される放射電磁界を抑制するというものである。
【0003】
【特許文献1】
特開2002−223107号公報(第2、第3ページ、図1)
【0004】
【発明が解決しようとする課題】
アンテナ素子に無給電素子を近接させて配置することにより、アンテナ素子側の指向性利得を高く、無給電素子側の指向性利得を低くすることができる。したがって、例えば携帯無線通信装置のホイップ型アンテナに対して、使用者の方に近い側に無給電素子を近接させて配置すれば、使用者方向の指向性利得を下げることができる。このような形態は、特許文献1の発明の実施の形態として開示されているが、ホイップ型アンテナに無給電素子を組み合わせて実装する必要があるため、アンテナの構造が大きく、複雑になりがちであり、携帯無線通信装置の小型化、薄型化の要請に十分応えるものとはいいがたい。
【0005】
そこで、本発明は、アンテナの指向性を適切に制御して放射効率の低下を防ぐと共に、小型化、薄型化を図ることのできる携帯無線通信装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するために、本発明の携帯無線通信装置は、第1の基板を内蔵し1の面に受話器を取り付けた第1の筐体及び第2の基板を内蔵した第2の筐体が連結部を介して開閉可能に構成されてなる本体と、前記連結部を通して前記第1の基板及び前記第2の基板を接続する接続手段と、前記本体に配設され、前記連結部との間の最小距離が4分の1波長以下であるように前記第1の基板又は前記第2の基板に設けられた給電点から給電されて、駆動電流ベクトルが生じるアンテナ素子と、一端が第1の短絡点において前記第1の筐体又は前記第1の基板の接地パターンに接続されると共に、他端が第2の短絡点において前記第2の筐体又は前記第2の基板の接地パターンに接続され、かつ、前記第1の短絡点及び前記第2の短絡点と前記給電点との間の距離が4分の1波長以下であると共に、前記第1の筐体及び前記第2の筐体を開いたときに前記第1の筐体の前記受話器を取り付けた面の側から見て前記アンテナ素子より前面に位置するように、前記連結部を通して前記接続手段とは別個に設けられ、前記駆動電流ベクトルと逆相の電流ベクトルが誘導される少なくとも1の短絡素子とを備えたことを特徴とする。
【0007】
本発明によれば、2筐体が開閉可能に連結されたタイプの携帯無線通信装置の構造上の特徴を利用して、アンテナの構造を複雑にすることなく、指向性を適切に制御することができる。
【0008】
【発明の実施の形態】
(第1の実施の形態)
以下に、本発明の第1の実施の形態を、図1乃至図3を参照して説明する。図1(a)は、本発明の第1の実施の形態に係る携帯無線通信装置の外観図であり、図1(c)の下側で定義した座標軸において「左」の方向から見た側面図として表したものである。図中、1は上筐体、2は下筐体、3はアンテナ、4は連結部であリ、この図は上筐体1及び下筐体2を開いた状態の側面図である。
【0009】
図1(b)及び(c)は、同じ携帯無線通信装置の本発明に直接関連のある内部の構成及び動作原理を説明する図であり、同図(b)は同図(a)と同じ「左」の方向から、同図(c)は「後」の方向からそれぞれ見た場合を表したものである。これらの図中、5は上筐体1に内蔵された上基板、6は下筐体2に内蔵された下基板、7は連結部4を通って上基板5の接地パターンと下基板6の接地パターンとを接続する短絡素子である。また、8は連結部4を通って上基板5及び下基板6の信号、電源又は接地パターン間を接続するフレキシブル基板である。
【0010】
ここで、短絡素子7は上側短絡点71において上基板5の接地パターンに、下側短絡点72において下基板6の接地パターンに、それぞれ接続されている。また、アンテナ3は、下基板6に設けられた無線部(図示せず。)から給電点31を通して給電され、給電点31と下側短絡点72との間の距離は4分の1波長以下である。
【0011】
短絡素子7はストレート形状をなし、図1(d)に示すように絶縁材料により被覆された導体として形成することができるほか、図1(e)に示すようにフレキシブル基板のパターンとして形成することもできる。後者の場合は、短絡素子7用として独立のフレキシブル基板を設けてもよいが、他の信号線に用いられるフレキシブル基板8の接地パターンを短絡素子7として利用することもできる。
【0012】
図2は、上筐体1及び下筐体2を導電性材料を用いて形成した場合、又は非導電性材料の一部にメッキ処理等により導通部分を設けた場合に、上側短絡点71を上基板5の接地パターンではなく上筐体1の導通部分に、下側短絡点72を下基板6の接地パターンではなく下筐体2の導通部分に、それぞれ設けた形の構成を示す図である。同図(a)は「後」の方向から、同図(b)は「左」の方向から、それぞれ見て表したものである。その他の図中の符号は、すべて図1と共通であるからそれらの説明は省略する。
【0013】
このように構成することによって、短絡素子7には、アンテナ3に流れる駆動電流ベクトルとほぼ逆向きの誘導電流ベクトルが流れ、これらの相互作用によって、特許文献1においても述べられているのと同様の原理により、「前」方向への放射電磁界が抑制される。アンテナ3及び短絡素子7がほぼ「上」−「下」方向を向いて位置することから、主に垂直偏波成分に対してこの効果が得られ、図3はその様子を示したものである。なお、短絡素子7の数は1に限る必要はなく、2以上であってもよい。
【0014】
本発明の第1の実施の形態によれば、上下2筐体間の連結部4に短絡素子7を配設してアンテナ3との位置関係を適切に設定することにより、使用者の方へ向く放射電磁界を抑制して放射効率の低下を防ぐことができる。
【0015】
(第2の実施の形態)
以下に、本発明の第2の実施の形態を、図4を参照して説明する。図4(a)、(b)及び(c1)は、本発明の第2の実施の形態に係る携帯無線通信装置の内部の構成を、いずれも図1(c)と同じ方向から見て表した図である。なお、図2(c2)は、図2(c)の背面図に対応する側面図で、図1(b)と同じ方向から見たものである。
【0016】
これらの図における図1(c)との相違は、図2(a)においては短絡素子7がヘリカル状に、同図(b)においてはメアンダ状に形成されている点であり、また同図(c1)及び(c2)においては短絡素子7がクランク状に形成されると共に連結部4の内側でロール形状をなして配設されている点である。なお、これらの形状とした短絡素子7は、絶縁材料により被覆された導体又は他の信号線等と共用、若しくは別個のフレキシブル基板のパターンとして形成することができる。また、その他の構成はすべて図1(c)と同一である。
【0017】
短絡素子7がこれらの形状をとることにより、アンテナ3の放射電磁界制御に関しては本発明の第1の実施の形態と同様の効果が得られるのに加えて、上筐体5と下筐体6の開閉操作に伴う短絡素子7の屈曲性が向上する。
【0018】
本発明の第2の実施の形態によれば、上筐体5と下筐体6の開閉操作に伴う短絡素子7の接続の信頼性を高めることができる。
【0019】
(第3の実施の形態)
以下に、本発明の第3の実施の形態を、図5を参照して説明する。図5(a)は、本発明の第3の実施の形態に係る携帯無線通信装置の内部の構成を、図1(c)と同じ方向から見て表した図であリ、図中の符号はすべて図1(c)と共通である。
【0020】
この図における図1(c)との相違は、短絡素子7にインピーダンス調整素子9が接続された点であり、その他の構成はすべて図1(c)と同一である。なお、短絡素子7は第1の実施の形態におけるのと同様に、被覆導体若しくはフレキシブル基板のパターン又は連結部4内側の表面のメッキ部分を用いて形成することができる。また、第2の実施の形態におけるのと同様に、ヘリカル状、メアンダ状又は連結部4の内側でロール形状をなして配設されたクランク状としてもよい。
【0021】
図5(b)は、同図(a)におけるインピーダンス調整素子9としてキャパシタ9aを、図5(c)は同じくインピーダンス調整素子9としてインダクタ9bを、それぞれ用いた場合を示す図である。なお、キャパシタ及びインダクタを同時に用いることも可能である。
【0022】
インピーダンス調整素子9は、短絡素子7のどの位置に設けてもよい。インピーダンス調整素子9を設けることによって、アンテナ3に短絡素子7を組み合せた時の不整合損を低減させ、放射効率を高めることが可能となる。
【0023】
本発明の第3の実施の形態によれば、アンテナ3に短絡素子7を組み合せた時の全体的なインピーダンス整合を改善して、放射効率を高めることができる。
【0024】
(第4の実施の形態)
以下に、本発明の第4の実施の形態を、図6を参照して説明する。図6(a)及び(b)は、本発明の第4の実施の形態に係る携帯無線通信装置の構成を示す図であり、それぞれ図2(a)及び(b)と同じ方向から見て表したものである。
【0025】
これらの図における図2(a)、(b)との相違は、非導電性のプラスチック等で形成された連結部4の内側の表面に導電性のメッキを施した部分を、短絡素子7として用いている点である。短絡素子7の一端は上側短絡点71において上筐体1に、他端は下側短絡点72において下筐体2に、それぞれ接続されている。その他の図中の符号は、すべて図2と共通である。
【0026】
また、図2(c)及び(d)は、図2(a)及び(b)の場合と異なり、上側短絡点71が上基板5の接地パターンに、下側短絡点72が下基板6の接地パターンに、それぞれ設けられた場合の当該携帯無線通信装置の構成を示す図である。各短絡点と短絡素子7との間は、例えばリード線によって接続される。
【0027】
これらの図に示した構成によっても、短絡素子7にアンテナ7の駆動電流ベクトルとほぼ逆向きの電流ベクトルが誘導され、第1の実施の形態におけるのと同様の効果を得ることができる。
【0028】
本発明の第4の実施の形態によれば、短絡素子7用のケーブルに開閉時のたわみを考慮した余長を持たせる必要がないので、連結部4のスペース効率を高め、またケーブルのたわみに伴う信頼性の低下を防ぐことができる。
【0029】
(第5の実施の形態)
以下に、本発明の第5の実施の形態を、図7及び図8を参照して説明する。図7(a)は、本発明の第5の実施の形態に係る携帯無線通信装置を図1(a)と同じ方向から見て表した外観図であり、図7(b)は、その構成を図1(c)同じ方向から見て表した図である。説明の都合上、図7(a)において上筐体1の「前」側の面に受話器10が取り付けられていることを示しており、その他の構成は図1(a)と同じである。
【0030】
また、図7(b)における図1(c)との相違は、連結部4を通って上基板5のパターンと下基板6のパターンとを接続する短絡素子70が新たに設けられると共に、短絡素子7及び70は、「左」−「右」軸に平行(アンテナ3を流れる駆動電流ベクトルの向きに垂直)な部分(以下、水平部分という。)を含んで図中に示した対称軸の両側で線対称に構成された点であり、その他は図1(c)と同じである。
【0031】
この場合、短絡素子7及び70の水平部分の誘導電流ベクトルは、図中に示すように互いに逆向きとなるから、誘導電流ベクトルによって発生し「前」の方向に放射される水平偏波成分が相殺される。これは、第2の実施の形態において述べたのと同様にして、短絡素子7及び70がクランク状に形成されると共に連結部4の内側でロール形状をなして配設されたような場合に、「前」方向への放射電磁界の垂直偏波成分だけでなく、水平偏波成分をも抑制する上で効果がある。なお、短絡素子73の形成の方法及びインピーダンス調整素子の接続については、第1乃至第3の実施の形態と同様である。
【0032】
図8は、本発明の第5の実施の形態のバリエーションを示す図である。図8(a)においては、短絡素子70がフレキシブル基板8のパターンとして形成されている。同図(b)においては、さらに短絡素子7もフレキシブル基板8のパターンとして形成されている。また、同図(c)においては、短絡素子7及び70の組合せが2対以上設けられている。これらのバリエーションによっても、水平偏波成分の抑制効果が得られると共に、製造工程の効率化や放射効率のさらなる向上等の付加的効果を得ることができる。
【0033】
本発明の第5の実施の形態によれば、「前」方向への放射電磁界の垂直偏波成分だけでなく、水平偏波成分を効果的に抑制することができる。
【0034】
本発明の効果を確認するために行ったシミュレーションの結果の一例を、図9に示す。図9(a)は短絡素子を設けた場合、図6(b)は短絡素子を設けない場合の「上」−「下」軸及び「前」−「後」軸を含む面内のアンテナ放射パターンをそれぞれ示しており、(b)に比べて(a)のパターンでは、「前」方向の放射電磁界(この例では主に垂直偏波成分)が効果的に抑制されていることがわかる。
【0035】
【発明の効果】
本発明によれば、携帯無線通信装置の2筐体連結構造を生かして、本体及びアンテナの構造を複雑にすることなく、使用者の方向への電磁界放射を抑制して放射効率の低下を防ぐことができる。
【図面の簡単な説明】
【図1】 (a)は本発明の第1の実施の形態に係る携帯無線通信装置の側面図、(b)及び(c)はその内部の構成及び動作原理を示す図、(d)及び(e)は短絡素子7の実現方法を説明する図。
【図2】 本発明の第1の実施の形態(筐体間の短絡による。)に係る携帯無線通信装置の内部の構成を示す図。
【図3】 本発明の第1の実施の形態に係る携帯無線通信装置の前方への放射電磁界の抑制効果を説明する図。
【図4】 本発明の第2の実施の形態に係る携帯無線通信装置の内部の構成を示す図。
【図5】 本発明の第3の実施の形態に係る携帯無線通信装置の内部の構成を示す図。
【図6】 本発明の第4の実施の形態に係る携帯無線通信装置の内部の構成を示す図。
【図7】 (a)は本発明の第5の実施の形態に係る携帯無線通信装置の側面図、(b)はその内部の構成を示す図。
【図8】 本発明の第5の実施の形態のバリエーションを説明する図。
【図9】 本発明に係る携帯無線通信装置のアンテナ放射パターンのシミュレーション結果を示す図。
【符号の説明】
1 上筐体
2 下筐体
3 アンテナ
4 連結部
5 上基板
6 下基板
7、70 短絡素子
71、73 上側短絡点
72、74 下側短絡点
8 フレキシブル基板
9 インピーダンス調整素子
9a キャパシタ
9b インダクタ
10 受話器
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a portable wireless communication device, and more particularly to a portable wireless communication device configured such that two housings are connected to each other via a connecting portion so as to be opened and closed.
[0002]
[Prior art]
In whip type and helical type antennas often used in portable radio communication devices, the radiation pattern is omnidirectional in the plane perpendicular to the direction of antenna extension, so a radiated electromagnetic field is also formed in the direction of the user. There is a problem of reducing the radiation efficiency. In order to improve this point, an invention has been made in which a parasitic element is arranged close to an antenna element (see, for example, Patent Document 1). In the invention disclosed in Patent Document 1, parasitic elements that are 0.01λ (λ is a wavelength) to 0.1λ longer than an antenna element are arranged at a distance of 0.01λ to 0.1λ. The directivity of the radiated electromagnetic field formed by the antenna element is improved, and the radiated electromagnetic field formed in the direction of the user is suppressed.
[0003]
[Patent Document 1]
JP 2002-223107 A (second and third pages, FIG. 1)
[0004]
[Problems to be solved by the invention]
By arranging the parasitic element close to the antenna element, the directivity gain on the antenna element side can be increased and the directivity gain on the parasitic element side can be decreased. Therefore, for example, if a parasitic element is arranged close to the whip-type antenna of the portable wireless communication device on the side closer to the user, the directivity gain in the user direction can be reduced. Although such a form is disclosed as an embodiment of the invention of Patent Document 1, since it is necessary to mount a parasitic element in combination with a whip type antenna, the structure of the antenna tends to be large and complicated. Yes, it cannot be said that the mobile radio communication device sufficiently satisfies the demand for miniaturization and thinning.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a portable radio communication device that can appropriately control the directivity of an antenna to prevent a decrease in radiation efficiency and can be reduced in size and thickness.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a portable wireless communication device according to the present invention includes a first housing having a first substrate and a receiver mounted on one surface, and a second housing having a second substrate. A main body configured to be openable and closable via a connecting portion, connecting means for connecting the first substrate and the second substrate through the connecting portion, and disposed on the main body, An antenna element that is fed from a feeding point provided on the first substrate or the second substrate so that a minimum distance between them is equal to or less than a quarter wavelength and generates a driving current vector, and one end of the antenna element is the first. Is connected to the ground pattern of the first casing or the first substrate at the short-circuit point, and the other end is connected to the ground pattern of the second casing or the second substrate at the second short-circuit point. And connected to the first short circuit point and the second short circuit point With the distance between the feed point of one wavelength less than a quarter, of the first housing and the first of the attached handset face of the casing when opening the second housing At least one short-circuit element that is provided separately from the connection means through the connecting portion so as to be positioned in front of the antenna element when viewed from the side and that induces a current vector having a phase opposite to that of the drive current vector. It is characterized by having.
[0007]
According to the present invention, directivity can be appropriately controlled without complicating the structure of an antenna by utilizing the structural features of a portable wireless communication device of a type in which two housings are connected in an openable / closable manner. Can do.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
In the following, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1A is an external view of the portable wireless communication apparatus according to the first embodiment of the present invention, and is a side view seen from the “left” direction on the coordinate axis defined on the lower side of FIG. It is shown as a diagram. In the figure, 1 is an upper housing, 2 is a lower housing, 3 is an antenna, 4 is a connecting portion, and this figure is a side view of the state in which the upper housing 1 and the lower housing 2 are opened.
[0009]
FIGS. 1B and 1C are diagrams for explaining the internal configuration and operation principle of the same portable wireless communication apparatus that are directly related to the present invention, and FIG. 1B is the same as FIG. From the “left” direction, FIG. 10C shows the case viewed from the “rear” direction. In these drawings, reference numeral 5 denotes an upper substrate built in the upper housing 1, 6 denotes a lower substrate built into the lower housing 2, and 7 denotes a ground pattern of the upper substrate 5 and the lower substrate 6 through the connecting portion 4. This is a short-circuit element that connects the ground pattern. Reference numeral 8 denotes a flexible substrate that connects signals, power sources, or ground patterns of the upper substrate 5 and the lower substrate 6 through the connecting portion 4.
[0010]
The short-circuit element 7 is connected to the ground pattern of the upper substrate 5 at the upper short-circuit point 71 and to the ground pattern of the lower substrate 6 at the lower short-circuit point 72. The antenna 3 is fed from a wireless unit (not shown) provided on the lower substrate 6 through a feeding point 31, and the distance between the feeding point 31 and the lower short-circuit point 72 is a quarter wavelength or less. It is.
[0011]
The short-circuit element 7 has a straight shape and can be formed as a conductor covered with an insulating material as shown in FIG. 1 (d), or as a pattern of a flexible substrate as shown in FIG. 1 (e). You can also. In the latter case, an independent flexible substrate may be provided for the short-circuit element 7, but the ground pattern of the flexible substrate 8 used for other signal lines can also be used as the short-circuit element 7.
[0012]
FIG. 2 shows the upper short-circuit point 71 when the upper housing 1 and the lower housing 2 are formed using a conductive material, or when a conductive portion is provided on a part of the non-conductive material by plating or the like. FIG. 6 is a diagram showing a configuration in which the upper substrate 5 is not provided with a grounding pattern in a conductive portion of the upper housing 1 and a lower short-circuit point 72 is provided in a conductive portion of the lower housing 2 instead of a grounding pattern of the lower substrate 6. is there. FIG. 4A is a view from the “rear” direction, and FIG. 4B is a view from the “left” direction. Since the reference numerals in the other figures are the same as those in FIG. 1, their description is omitted.
[0013]
With this configuration, the short-circuit element 7 is supplied with an induced current vector in a direction almost opposite to the drive current vector flowing through the antenna 3, and the interaction thereof is the same as described in Patent Document 1 as well. By this principle, the radiated electromagnetic field in the “front” direction is suppressed. Since the antenna 3 and the short-circuit element 7 are positioned substantially in the “up”-“down” direction, this effect can be obtained mainly with respect to the vertical polarization component, and FIG. 3 shows this state. . Note that the number of the short-circuit elements 7 is not limited to 1, and may be 2 or more.
[0014]
According to the first embodiment of the present invention, the short-circuit element 7 is disposed in the connecting portion 4 between the upper and lower two casings, and the positional relationship with the antenna 3 is appropriately set, thereby providing the user. It is possible to prevent the radiation efficiency from decreasing by suppressing the radiated electromagnetic field.
[0015]
(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to FIG. 4 (a), (b) and (c1) show the internal configuration of the portable wireless communication apparatus according to the second embodiment of the present invention as seen from the same direction as FIG. 1 (c). FIG. 2 (c2) is a side view corresponding to the rear view of FIG. 2 (c) and is viewed from the same direction as FIG. 1 (b).
[0016]
1 (c) is different from FIG. 1 (c) in that the short-circuit element 7 is formed in a helical shape in FIG. 2 (a) and in a meander shape in FIG. 2 (b). In (c1) and (c2), the short-circuit element 7 is formed in a crank shape and disposed in a roll shape inside the connecting portion 4. Note that the short-circuit element 7 having these shapes can be shared with a conductor covered with an insulating material, another signal line, or the like, or can be formed as a pattern on a separate flexible substrate. All other configurations are the same as those in FIG.
[0017]
Since the short-circuit element 7 takes these shapes, the effect similar to that of the first embodiment of the present invention can be obtained with respect to the radiated electromagnetic field control of the antenna 3, and the upper casing 5 and the lower casing can be obtained. The flexibility of the short-circuit element 7 accompanying the opening / closing operation 6 is improved.
[0018]
According to the second embodiment of the present invention, the reliability of the connection of the short-circuit element 7 accompanying the opening / closing operation of the upper housing 5 and the lower housing 6 can be enhanced.
[0019]
(Third embodiment)
Below, the 3rd Embodiment of this invention is described with reference to FIG. FIG. 5A is a diagram showing the internal configuration of the portable wireless communication apparatus according to the third embodiment of the present invention as viewed from the same direction as FIG. Are all the same as in FIG.
[0020]
1 is different from FIG. 1C in that an impedance adjusting element 9 is connected to the short-circuit element 7, and all other configurations are the same as those in FIG. 1C. In addition, the short circuit element 7 can be formed using the pattern of a covered conductor or a flexible substrate, or the plating part of the inner surface of the connection part 4 similarly to 1st Embodiment. Further, as in the second embodiment, a helical shape, a meander shape, or a crank shape arranged in a roll shape inside the connecting portion 4 may be used.
[0021]
5B is a diagram showing a case where a capacitor 9a is used as the impedance adjustment element 9 in FIG. 5A, and FIG. It is possible to use a capacitor and an inductor at the same time.
[0022]
The impedance adjustment element 9 may be provided at any position on the short-circuit element 7. By providing the impedance adjusting element 9, it is possible to reduce mismatch loss when the short-circuit element 7 is combined with the antenna 3 and to increase the radiation efficiency.
[0023]
According to the third embodiment of the present invention, the overall impedance matching when the short-circuit element 7 is combined with the antenna 3 can be improved, and the radiation efficiency can be increased.
[0024]
(Fourth embodiment)
Below, the 4th Embodiment of this invention is described with reference to FIG. 6 (a) and 6 (b) are diagrams showing the configuration of the portable wireless communication apparatus according to the fourth embodiment of the present invention, and are viewed from the same direction as FIGS. 2 (a) and 2 (b), respectively. It is a representation.
[0025]
2 (a) and 2 (b) is different from FIGS. 2 (a) and 2 (b) in that a portion obtained by conducting conductive plating on the inner surface of the connecting portion 4 formed of non-conductive plastic or the like is used as a short-circuit element 7. It is a point to use. One end of the short-circuit element 7 is connected to the upper housing 1 at the upper short-circuit point 71, and the other end is connected to the lower housing 2 at the lower short-circuit point 72. Reference numerals in other figures are the same as those in FIG.
[0026]
2 (c) and 2 (d) are different from FIGS. 2 (a) and 2 (b) in that the upper short circuit point 71 is the ground pattern of the upper substrate 5 and the lower short circuit point 72 is the lower substrate 6. It is a figure which shows the structure of the said portable radio | wireless communication apparatus when each is provided in a grounding pattern. Each short-circuit point and the short-circuit element 7 are connected by, for example, a lead wire.
[0027]
Also with the configurations shown in these drawings, a current vector in a direction almost opposite to the drive current vector of the antenna 7 is induced in the short-circuit element 7, and the same effect as in the first embodiment can be obtained.
[0028]
According to the fourth embodiment of the present invention, the cable for the short-circuit element 7 does not need to have a surplus length considering the deflection at the time of opening and closing, so that the space efficiency of the connecting portion 4 is improved and the cable is bent. It is possible to prevent a decrease in reliability associated with.
[0029]
(Fifth embodiment)
Below, the 5th Embodiment of this invention is described with reference to FIG.7 and FIG.8. FIG. 7A is an external view of a portable wireless communication apparatus according to the fifth embodiment of the present invention viewed from the same direction as FIG. 1A, and FIG. FIG. 1C is a diagram showing the same as seen from the same direction. For convenience of explanation, FIG. 7A shows that the handset 10 is attached to the “front” side surface of the upper housing 1, and the other configuration is the same as FIG. 1A.
[0030]
7 (b) is different from FIG. 1 (c) in that a short-circuit element 70 is newly provided to connect the pattern of the upper substrate 5 and the pattern of the lower substrate 6 through the connecting portion 4, and the short circuit. The elements 7 and 70 include a portion (hereinafter, referred to as a horizontal portion) that is parallel to the “left”-“right” axis (perpendicular to the direction of the drive current vector that flows through the antenna 3) (hereinafter, referred to as a horizontal portion). This is a point that is symmetrical with respect to both sides, and the other points are the same as in FIG.
[0031]
In this case, since the induced current vectors of the horizontal portions of the short-circuit elements 7 and 70 are opposite to each other as shown in the figure, the horizontal polarization component generated by the induced current vector and radiated in the “front” direction is Offset. This is the same as described in the second embodiment when the short-circuit elements 7 and 70 are formed in a crank shape and arranged in a roll shape inside the connecting portion 4. This is effective in suppressing not only the vertical polarization component of the electromagnetic field radiated in the “front” direction but also the horizontal polarization component. The method for forming the short-circuit element 73 and the connection of the impedance adjustment element are the same as those in the first to third embodiments.
[0032]
FIG. 8 is a diagram showing a variation of the fifth embodiment of the present invention. In FIG. 8A, the short-circuit element 70 is formed as a pattern of the flexible substrate 8. In FIG. 2B, the short-circuit element 7 is also formed as a pattern of the flexible substrate 8. Moreover, in the figure (c), two or more combinations of the short circuit elements 7 and 70 are provided. Even with these variations, the effect of suppressing the horizontal polarization component can be obtained, and additional effects such as an increase in efficiency of the manufacturing process and further improvement of the radiation efficiency can be obtained.
[0033]
According to the fifth embodiment of the present invention, not only the vertical polarization component of the radiated electromagnetic field in the “front” direction but also the horizontal polarization component can be effectively suppressed.
[0034]
An example of the result of the simulation performed to confirm the effect of the present invention is shown in FIG. FIG. 9A shows the antenna radiation in the plane including the “upper”-“lower” axis and the “front”-“rear” axis when the short-circuit element is provided, and FIG. 6B shows the case where the short-circuit element is not provided. Each pattern is shown, and in the pattern (a) compared to (b), it can be seen that the radiation field in the “front” direction (mainly vertically polarized wave component in this example) is effectively suppressed. .
[0035]
【The invention's effect】
According to the present invention, by taking advantage of the two-case connection structure of the portable wireless communication device, the electromagnetic radiation in the direction of the user is suppressed and the radiation efficiency is reduced without complicating the structure of the main body and the antenna. Can be prevented.
[Brief description of the drawings]
1A is a side view of a portable wireless communication apparatus according to a first embodiment of the present invention, FIGS. 1B and 1C are diagrams showing an internal configuration and an operation principle thereof, FIG. (E) is a figure explaining the realization method of the short circuiting element 7. FIG.
FIG. 2 is a diagram showing an internal configuration of the portable wireless communication apparatus according to the first embodiment of the present invention (due to a short circuit between casings).
FIG. 3 is a diagram for explaining the effect of suppressing the radiated electromagnetic field forward of the portable wireless communication device according to the first embodiment of the present invention.
FIG. 4 is a diagram showing an internal configuration of a portable wireless communication apparatus according to a second embodiment of the present invention.
FIG. 5 is a diagram showing an internal configuration of a portable wireless communication apparatus according to a third embodiment of the present invention.
FIG. 6 is a diagram showing an internal configuration of a portable wireless communication apparatus according to a fourth embodiment of the present invention.
FIG. 7A is a side view of a portable wireless communication apparatus according to a fifth embodiment of the present invention, and FIG. 7B is a diagram showing an internal configuration thereof.
FIG. 8 is a diagram for explaining a variation of the fifth embodiment of the present invention.
FIG. 9 is a diagram showing a simulation result of an antenna radiation pattern of the portable wireless communication device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper housing | casing 2 Lower housing | casing 3 Antenna 4 Connection part 5 Upper substrate 6 Lower substrate 7, 70 Short-circuit element 71, 73 Upper short-circuit point 72, 74 Lower-side short-circuit point 8 Flexible substrate 9 Impedance adjustment element 9a Capacitor 9b Inductor 10 Handset

Claims (6)

第1の基板を内蔵し1の面に受話器を取り付けた第1の筐体及び第2の基板を内蔵した第2の筐体が連結部を介して開閉可能に構成されてなる本体と、
前記連結部を通して前記第1の基板及び前記第2の基板を接続する接続手段と、
前記本体に配設され、前記連結部との間の最小距離が4分の1波長以下であるように前記第1の基板又は前記第2の基板に設けられた給電点から給電されて、駆動電流ベクトルが生じるアンテナ素子と、
一端が第1の短絡点において前記第1の筐体又は前記第1の基板の接地パターンに接続されると共に、他端が第2の短絡点において前記第2の筐体又は前記第2の基板の接地パターンに接続され、かつ、前記第1の短絡点及び前記第2の短絡点と前記給電点との間の距離が4分の1波長以下であると共に、前記第1の筐体及び前記第2の筐体を開いたときに前記第1の筐体の前記受話器を取り付けた面の側から見て前記アンテナ素子より前面に位置するように、前記連結部を通して前記接続手段とは別個に設けられ、前記駆動電流ベクトルと逆相の電流ベクトルが誘導される少なくとも1の短絡素子とを
備えたことを特徴とする携帯無線通信装置。
A main body in which a first housing containing a first board and a receiver mounted on one surface and a second housing containing a second board are configured to be openable and closable via a connecting portion;
Connecting means for connecting the first substrate and the second substrate through the connecting portion;
Driven by feeding from a feeding point provided on the first substrate or the second substrate so that a minimum distance between the coupling portion and the main body is less than a quarter wavelength. An antenna element that produces a current vector;
One end is connected to the ground pattern of the first casing or the first substrate at a first short circuit point, and the other end is connected to the second casing or the second substrate at a second short circuit point. And the distance between the first short circuit point and the second short circuit point and the feed point is equal to or less than a quarter wavelength , and the first housing and the Separately from the connection means through the connecting portion so that when the second housing is opened, the first housing is positioned in front of the antenna element when viewed from the surface on which the receiver is attached. A portable wireless communication device comprising: at least one short-circuit element that is provided and induces a current vector having a phase opposite to that of the drive current vector.
前記短絡素子は、前記連結部の導電性メッキが施された部分から形成されたことを特徴とする請求項1に記載の携帯無線通信装置。  The portable wireless communication device according to claim 1, wherein the short-circuit element is formed from a portion of the connecting portion that has been subjected to conductive plating. 前記短絡素子にインピーダンス調整手段が接続されていることを特徴とする請求項1又は請求項2に記載の携帯無線通信装置。  The portable wireless communication apparatus according to claim 1, wherein an impedance adjusting unit is connected to the short-circuit element. 前記短絡素子を2以上備えたことを特徴とする請求項1に記載の携帯無線通信装置。The portable wireless communication device according to claim 1, comprising two or more short-circuit elements. 前記短絡素子を2以上備え、かつ、前記短絡素子の1対はそれぞれ前記駆動電流ベクトルの向きに垂直に配設された部分を含むと共に前記第1の筐体の受話器を取り付けた面に垂直な方向から見た時に互いに線対称をなして構成されたことを特徴とする請求項1に記載の携帯無線通信装置。 Two or more short-circuit elements are provided, and each pair of the short-circuit elements includes a portion disposed perpendicular to the direction of the drive current vector, and is perpendicular to the surface of the first housing on which the receiver is attached. 2. The portable radio communication apparatus according to claim 1, wherein the portable radio communication apparatus is configured to be symmetrical with each other when viewed from a direction . 前記短絡素子を2対以上備えたことを特徴とする請求項4又は請求項5に記載の携帯無線通信装置。The portable wireless communication device according to claim 4, wherein two or more pairs of the short-circuit elements are provided.
JP2003196646A 2003-07-14 2003-07-14 Portable wireless communication device Expired - Fee Related JP4229772B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003196646A JP4229772B2 (en) 2003-07-14 2003-07-14 Portable wireless communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003196646A JP4229772B2 (en) 2003-07-14 2003-07-14 Portable wireless communication device

Publications (2)

Publication Number Publication Date
JP2005033551A JP2005033551A (en) 2005-02-03
JP4229772B2 true JP4229772B2 (en) 2009-02-25

Family

ID=34207070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003196646A Expired - Fee Related JP4229772B2 (en) 2003-07-14 2003-07-14 Portable wireless communication device

Country Status (1)

Country Link
JP (1) JP4229772B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008227560A (en) * 2007-03-08 2008-09-25 Nec Corp Portable wireless apparatus
JP2009071513A (en) 2007-09-12 2009-04-02 Toshiba Corp Portable terminal
US8749443B2 (en) 2008-12-25 2014-06-10 Kyocera Corporation Wireless terminal device
JP4644299B2 (en) * 2009-11-24 2011-03-02 シャープ株式会社 Wireless communication device

Also Published As

Publication number Publication date
JP2005033551A (en) 2005-02-03

Similar Documents

Publication Publication Date Title
JP4358084B2 (en) Foldable portable radio
JP3613525B2 (en) Portable radio
JP4146478B2 (en) Wireless module and portable terminal
JP3789424B2 (en) Mobile device
US7791546B2 (en) Antenna device and electronic apparatus
US8619001B2 (en) Multi-antenna apparatus and mobile device
JP4422767B2 (en) Antenna device for portable terminal and portable terminal
JP4227141B2 (en) Antenna device
JP4197734B2 (en) Wireless module
US7081853B2 (en) Mobile communication terminal
JP2007142895A (en) Wireless apparatus and electronic apparatus
JP2002151923A (en) Mobile terminal
CN114122712B (en) Antenna structure and electronic equipment
JP2005252406A (en) Antenna structure and television receiver
JP4952835B2 (en) Modified folded dipole antenna, impedance adjustment method thereof, and antenna device
JPH11163756A (en) Portable radio equipment
JP2001244715A (en) Antenna system
JP3925420B2 (en) Portable radio
JP4229772B2 (en) Portable wireless communication device
JP2002152353A (en) Portable terminal
JP2008227560A (en) Portable wireless apparatus
JP5789777B2 (en) Mobile terminal device
JP3824579B2 (en) Antenna device, portable wireless communication device, and connection member
CN114389005B (en) Electronic equipment
WO2016186092A1 (en) Antenna device and electronic apparatus

Legal Events

Date Code Title Description
RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20050415

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20050606

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060714

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080728

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080819

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20081020

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20081128

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20081202

R151 Written notification of patent or utility model registration

Ref document number: 4229772

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111212

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121212

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121212

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131212

Year of fee payment: 5

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313117

Free format text: JAPANESE INTERMEDIATE CODE: R313121

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees