JP2003069326A - Antenna system - Google Patents
Antenna systemInfo
- Publication number
- JP2003069326A JP2003069326A JP2001258154A JP2001258154A JP2003069326A JP 2003069326 A JP2003069326 A JP 2003069326A JP 2001258154 A JP2001258154 A JP 2001258154A JP 2001258154 A JP2001258154 A JP 2001258154A JP 2003069326 A JP2003069326 A JP 2003069326A
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- Japan
- Prior art keywords
- conductor
- flat
- distance
- conductors
- antenna device
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、無線通信に必要
不可欠なアンテナ装置に関し、特に携帯電話、ＰＨＳ、
Ｂｌｕｅｔｏｏｔｈなど、各種無線システムおよびサー
ビスの移動端末機に設置される小型アンテナに関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device indispensable for wireless communication, and particularly to a mobile phone, PHS,
The present invention relates to a small antenna installed in a mobile terminal of various wireless systems and services such as Bluetooth.
【０００２】[0002]
【従来の技術】現在広く用いられている携帯無線端末用
のアンテナは、引き出しや収納が可能な“ホイップアン
テナ”である。ホイップアンテナは、無線機の筐体に内
蔵された回路基板と、四分の一波長から半波長程度の電
気長を有する線状導体との間に給電する構成となってい
る。即ち、回路基板をアンテナ導体として利用してい
る。このため、回路基板にも多くの電流が流れる。その
結果、人体頭部と人体手部とがともに筐体に近接する通
話時において、人体の電力吸収作用により、アンテナか
ら遠方に放射される電力の割合が大きく低下してしまう
ことが知られている。2. Description of the Related Art An antenna for a portable wireless terminal which is widely used at present is a "whipped antenna" which can be pulled out and stored. The whip antenna is configured to feed power between a circuit board built in the housing of the wireless device and a linear conductor having an electrical length of about a quarter wavelength to a half wavelength. That is, the circuit board is used as an antenna conductor. Therefore, a large amount of current also flows in the circuit board. As a result, it is known that, during a call in which both the human head and the human hand are in proximity to the housing, the ratio of the power radiated far from the antenna is greatly reduced due to the power absorption effect of the human body. There is.
【０００３】この問題を克服するための一方法として、
例えば、スリーブアンテナを携帯無線機端末に取り付け
る構成が考案されている（特開平４−１２０９０２号公
報を参照）。As one method for overcoming this problem,
For example, a configuration has been devised in which a sleeve antenna is attached to a mobile radio terminal (see Japanese Patent Laid-Open No. 4-120902).
【０００４】一般に、給電線路の地導体を外側に折り返
した導体と、給電線路の芯線に接続された導体とで構成
されるアンテナをスリーブアンテナと呼び、その地導体
を外側に折り返した導体のことをスリーブと呼ぶ。スリ
ーブは、アンテナ導体の一部として動作するとともに、
スリーブ長が四分の一波長程度である場合には、スリー
ブ下端からアンテナ側を見たインピーダンスが非常に大
きくなるので、その給電線路の地導体の外壁に漏洩する
電流を阻止する作用も有する。In general, an antenna composed of a conductor obtained by folding the ground conductor of the feed line outward and a conductor connected to the core of the feed line is called a sleeve antenna, and a conductor obtained by folding the ground conductor outward. Is called a sleeve. The sleeve acts as part of the antenna conductor,
When the sleeve length is about a quarter wavelength, the impedance seen from the lower end of the sleeve to the antenna side becomes very large, so that it also has a function of blocking current leaking to the outer wall of the ground conductor of the feed line.
【０００５】特開平４−１２０９０２号公報に開示され
ている発明は、このスリーブの電流阻止作用を利用して
無線機の筐体に内蔵された回路基板に電流を流さない構
成とすることにより、通話状態におけるアンテナの高効
率化を意図したものである。The invention disclosed in Japanese Unexamined Patent Publication No. 4-120902 utilizes the current blocking action of the sleeve to prevent current from flowing through the circuit board built in the housing of the radio device. It is intended to improve the efficiency of the antenna in a call state.
【０００６】[0006]
【発明が解決しようとする課題】従来のアンテナ装置は
以上のように構成されているので、物理長が少なくとも
約四分の一波長以上になる。したがって、使用する周波
数と筐体によっては、携帯無線機の筐体内にアンテナを
収納することができない課題があった。Since the conventional antenna device is constructed as described above, the physical length is at least about a quarter wavelength or longer. Therefore, there is a problem that the antenna cannot be housed in the housing of the portable wireless device depending on the frequency used and the housing.
【０００７】この発明は上記のような課題を解決するた
めになされたもので、使用周波数に拘わらず、無線機の
筐体内に収納することが可能な小型のアンテナ装置を得
ることを目的とする。The present invention has been made to solve the above problems, and an object thereof is to obtain a small antenna device which can be housed in the housing of a radio regardless of the frequency used. .
【０００８】[0008]
【課題を解決するための手段】この発明に係るアンテナ
装置は、第１の円筒状導体が第２の円筒状導体より無線
機の筐体側に設置されている場合、同軸線路に対する第
１の円筒状導体の間隔を、同軸線路に対する第２の円筒
状導体の間隔より小さくするようにしたものである。In the antenna device according to the present invention, when the first cylindrical conductor is installed closer to the casing of the radio device than the second cylindrical conductor is, the first cylindrical conductor with respect to the coaxial line is provided. The distance between the conductors is smaller than the distance between the second cylindrical conductor and the coaxial line.
【０００９】この発明に係るアンテナ装置は、第１の円
筒状導体と同軸線路の間に誘電体を充填するようにした
ものである。The antenna device according to the present invention is such that a dielectric is filled between the first cylindrical conductor and the coaxial line.
【００１０】この発明に係るアンテナ装置は、第１の平
板状導体が第２の平板状導体より無線機の筐体側に設置
されている場合、給電線路に対する第１の平板状導体の
間隔を、給電線路に対する第２の平板状導体の間隔より
小さくするようにしたものである。In the antenna device according to the present invention, when the first flat plate-shaped conductor is installed closer to the casing of the radio device than the second flat plate-shaped conductor, the distance between the first flat plate-shaped conductor and the feed line is The distance is smaller than the distance between the second flat conductor and the power supply line.
【００１１】この発明に係るアンテナ装置は、第１の平
板状導体と給電線路の間に誘電体を充填するようにした
ものである。In the antenna device according to the present invention, a dielectric is filled between the first flat conductor and the feed line.
【００１２】この発明に係るアンテナ装置は、第１及び
第２の平板状導体の外側に所定の間隔をもって、第１及
び第２の平板状導体と長さが異なる第３及び第４の平板
状導体を設置するようにしたものである。In the antenna device according to the present invention, the third and fourth flat plate-shaped conductors having different lengths from the first and second flat plate-shaped conductors are provided outside the first and second flat plate-shaped conductors at a predetermined interval. A conductor is installed.
【００１３】この発明に係るアンテナ装置は、第３の平
板状導体が第４の平板状導体より無線機の筐体側に設置
されている場合、第１及び第２の平板状導体に対する第
３の平板状導体の間隔を、第１及び第２の平板状導体に
対する第４の平板状導体の間隔より小さくするようにし
たものである。In the antenna device according to the present invention, when the third plate-shaped conductor is installed closer to the casing of the radio device than the fourth plate-shaped conductor, the third plate-shaped conductor is provided with respect to the third plate-shaped conductor. The distance between the flat conductors is smaller than the distance between the fourth flat conductors with respect to the first and second flat conductors.
【００１４】この発明に係るアンテナ装置は、給電線路
の左側に設置する第１及び第２の平板状導体の長さと、
給電線路の右側に設置する第１及び第２の平板状導体の
長さを変えるようにしたものである。In the antenna device according to the present invention, the lengths of the first and second flat conductors installed on the left side of the feed line,
The lengths of the first and second plate-shaped conductors installed on the right side of the power feeding line are changed.
【００１５】この発明に係るアンテナ装置は、同軸線路
の外壁と円筒状導体の内壁との間隔を連続的又は段階的
に変化させるようにしたものである。In the antenna device according to the present invention, the distance between the outer wall of the coaxial line and the inner wall of the cylindrical conductor is continuously or stepwise changed.
【００１６】この発明に係るアンテナ装置は、円筒状導
体の筐体側の端部における同軸線路の外壁と円筒状導体
の内壁との間隔を、円筒状導体の筐体側と反対の端部に
おける同軸線路の外壁と円筒状導体の内壁との間隔より
小さくするようにしたものである。In the antenna device according to the present invention, the distance between the outer wall of the coaxial conductor and the inner wall of the cylindrical conductor at the end of the cylindrical conductor on the side of the housing is the same as that of the end of the cylindrical conductor on the side opposite to the side of the housing. The distance between the outer wall and the inner wall of the cylindrical conductor is smaller.
【００１７】この発明に係るアンテナ装置は、給電線路
と平板状導体との間隔を連続的又は段階的に変化させる
ようにしたものである。In the antenna device according to the present invention, the distance between the feed line and the flat conductor is continuously or stepwise changed.
【００１８】この発明に係るアンテナ装置は、給電線路
の筐体側の端部における給電線路と平板状導体との間隔
を、給電線路の筐体側と反対の端部における給電線路と
平板状導体との間隔より小さくするようにしたものであ
る。In the antenna device according to the present invention, the distance between the feed line and the plate-shaped conductor at the end of the feed line on the side of the housing is equal to that of the feed line and the plate-shaped conductor at the end of the feed line opposite to the side of the case. It is designed to be smaller than the interval.
【００１９】[0019]
【発明の実施の形態】以下、この発明の実施の一形態を
説明する。
実施の形態１．図１はこの発明の実施の形態１によるア
ンテナ装置を示す斜視図であり、図において、１は携帯
無線端末機（無線機）の筐体、２は一端が携帯無線端末
機の筐体１に取り付けられた同軸線路、３はアンテナで
ある。図２（ａ）はアンテナ３を示す拡大立体図であ
り、図２（ｂ）はアンテナ３を示す拡大断面図である。
図において、４は同軸線路２の内導体、５は同軸線路２
の外導体、６は同軸線路２の外導体５と間隔Ｄ1 を保ち
ながら、同軸線路２を取り囲むように設置されたスリー
ブ導体（第１の円筒状導体）、７は同軸線路２の外導体
５と間隔Ｄ2 を保ちながら、同軸線路２を取り囲むよう
に設置されたスリーブ導体（第２の円筒状導体）であ
る。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below. Embodiment 1. 1 is a perspective view showing an antenna device according to a first embodiment of the present invention, in which 1 is a housing of a portable wireless terminal (radio device), and 2 is a housing 1 of a portable wireless terminal at one end. The attached coaxial line 3 is an antenna. 2A is an enlarged three-dimensional view showing the antenna 3, and FIG. 2B is an enlarged sectional view showing the antenna 3.
In the figure, 4 is an inner conductor of the coaxial line 2, and 5 is the coaxial line 2.
Outer conductor, 6 is a sleeve conductor (first cylindrical conductor) installed so as to surround the coaxial line 2 while maintaining a distance D 1 from the outer conductor 5 of the coaxial line 2, and 7 is an outer conductor of the coaxial line 2. 5 is a sleeve conductor (second cylindrical conductor) that is installed so as to surround the coaxial line 2 while maintaining a distance D 2 from the same.
【００２０】８はスリーブ導体６の上端とスリーブ導体
７の下端とを物理的に隙間なく接続する環状導体板、９
は同軸線路２の外導体５の上端とスリーブ導体７の上端
とを物理的に隙間なく接続する環状導体板、１０は給電
点、１１はアンテナ素子、１２はスリーブ導体６と同軸
線路２の外導体５間に充填された誘電体である。Reference numeral 8 denotes an annular conductor plate for connecting the upper end of the sleeve conductor 6 and the lower end of the sleeve conductor 7 without any physical gap, and 9
Is an annular conductor plate that physically connects the upper end of the outer conductor 5 of the coaxial line 2 and the upper end of the sleeve conductor 7 without a gap, 10 is a feeding point, 11 is an antenna element, and 12 is the outside of the sleeve conductor 6 and the coaxial line 2. It is a dielectric filled between the conductors 5.
【００２１】次に動作について説明する。送信信号は、
携帯無線端末機の筐体１に内蔵されている無線回路か
ら、同軸線路２を介して、アンテナ３に伝送される。ア
ンテナ３は、同軸線路２の外導体５の外壁から径方向に
概略一定の間隙を隔てて配置されたスリーブ導体６と、
そのスリーブ導体６と異なる直径を有し、外導体５の外
壁から径方向に概略一定の間隙を隔てて配置されたスリ
ーブ導体７と、スリーブ導体６の上端とスリーブ導体７
の下端とを物理的に隙間なく接続する環状導体板８と、
同軸線路２の外導体５の上端とスリーブ導体７の上端と
を物理的に隙間なく接続する環状導体板９と、同軸線路
２の内導体４に接続されたアンテナ素子１１とで構成さ
れる。Next, the operation will be described. The transmitted signal is
The signal is transmitted from the wireless circuit built in the casing 1 of the portable wireless terminal to the antenna 3 via the coaxial line 2. The antenna 3 includes a sleeve conductor 6 arranged at an approximately constant gap in a radial direction from an outer wall of the outer conductor 5 of the coaxial line 2.
A sleeve conductor 7 having a diameter different from that of the sleeve conductor 6 and arranged at an approximately constant gap in the radial direction from the outer wall of the outer conductor 5, and an upper end of the sleeve conductor 6 and the sleeve conductor 7.
An annular conductor plate 8 that physically connects the lower end of the
An annular conductor plate 9 that physically connects the upper end of the outer conductor 5 of the coaxial line 2 and the upper end of the sleeve conductor 7 without a gap, and an antenna element 11 connected to the inner conductor 4 of the coaxial line 2.
【００２２】ここで、携帯無線端末機の筐体１側に電流
を流さないための条件、即ち、スリーブ導体６の下端か
らアンテナ３側を見たインピーダンスが無限大となる条
件を課すと、スリーブ導体６の長さＬ1 、スリーブ導体
７の長さＬ2 、スリーブ導体６の内壁と同軸線路２の外
導体５の外壁とで構成される伝送線路の特性インピーダ
ンスＺ1 、スリーブ導体７の内壁と同軸線路２の外導体
５の外壁とで構成される線路の特性インピーダンスＺ2
の間に以下の関係式が得られる。
ｔａｎ（２πＬ＾1 ）ｔａｎ（２πＬ＾2 ）＝Ｚ1 ／Ｚ2 （１）
ただし、Ｌ＾1 、Ｌ＾2 は、波長で規格化されたスリー
ブ導体６，７の長さである。Here, if a condition that current is not applied to the casing 1 side of the portable wireless terminal, that is, a condition that the impedance when the antenna 3 side is viewed from the lower end of the sleeve conductor 6 is infinite, is imposed, the sleeve is the length L 1 of the conductor 6, the length L 2 of the sleeve conductor 7, the characteristic impedance Z 1 of the transmission line constituted by the outer wall of the outer conductor 5 of the inner wall and the coaxial line 2 of the sleeve conductor 6, the inner wall of the sleeve conductor 7 And the characteristic impedance Z 2 of the line formed by the outer wall of the outer conductor 5 of the coaxial line 2
The following relational expression is obtained during. tan (2πL ^ 1 ) tan (2πL ^ 2 ) = Z 1 / Z 2 (1) where L ^ 1 and L ^ 2 are the lengths of the sleeve conductors 6 and 7 normalized by the wavelength.
【００２３】図３はスリーブ導体７の長さＬ2 をパラメ
ータとして、インピーダンス比Ｚ2／Ｚ1 を横軸、スリ
ーブ導体の全長（スリーブ導体６の長さＬ1 とスリーブ
導体７の長さＬ2 の和）を縦軸にとったグラフ図であ
る。図３から特性インピーダンスＺ2 を特性インピーダ
ンスＺ1 より大きくすることによって、スリーブ導体の
全長を四分の一波長より短くできることが分かる。ま
た、特性インピーダンスＺ1 に対する特性インピーダン
スＺ2 の比を大きくする程、スリーブ導体の全長（スリ
ーブ導体６の長さＬ1 とスリーブ導体７の長さＬ2 の
和）が短くなることが分かる。また、インピーダンス比
Ｚ2 ／Ｚ1 が決定されたとき、スリーブ導体の全長を最
小にする長さＬ1 と長さＬ2 の比が存在することも確認
できる。In FIG. 3, with the length L 2 of the sleeve conductor 7 as a parameter, the impedance ratio Z 2 / Z 1 is plotted along the abscissa, and the total length of the sleeve conductor (the length L 1 of the sleeve conductor 6 and the length L of the sleeve conductor 7 is L. It is the graph figure which took the sum of 2 ) as the vertical axis. It can be seen from FIG. 3 that the total length of the sleeve conductor can be made shorter than a quarter wavelength by making the characteristic impedance Z 2 larger than the characteristic impedance Z 1 . Also, the larger the ratio of the characteristic impedance Z 2 for the characteristic impedance Z 1, the overall length of the sleeve conductor (the sum of the lengths L 2 of the length L 1 and the sleeve conductor 7 of the sleeve conductor 6) is can be seen that short. It can also be seen that when the impedance ratio Z 2 / Z 1 is determined, there is a ratio of length L 1 to length L 2 that minimizes the overall length of the sleeve conductor.
【００２４】一般に、２つの導体から成る伝送線路の特
性インピーダンスは、両導体の間隔と、両導体間の空間
の誘電率に依存することが知られている。即ち、間隔を
大きくするとインピーダンスが大きくなり、間隔を小さ
くするとインピーダンスが小さくなる。また、誘電率を
大きくするとインピーダンスが小さくなり、誘電率を小
さくするとインピーダンスが大きくなる。It is generally known that the characteristic impedance of a transmission line composed of two conductors depends on the distance between the two conductors and the permittivity of the space between the two conductors. That is, increasing the interval increases the impedance, and decreasing the interval decreases the impedance. Also, increasing the permittivity decreases the impedance, and decreasing the permittivity increases the impedance.
【００２５】したがって、スリーブ導体６の内壁と同軸
線路２の外導体５の外壁との間隔Ｄ 1 を、スリーブ導体
７の内壁と同軸線路２の外導体５の外壁との間隔Ｄ2 に
比して小さくすれば、スリーブ導体の全長を四分の一波
長より短くすることが可能である。また、スリーブ導体
６と同軸線路２の外導体５との間に誘電体１２を充填す
ることにより、更なるスリーブ長の短縮が可能となる。Therefore, it is coaxial with the inner wall of the sleeve conductor 6.
Distance D from outer wall of outer conductor 5 of line 2 1The sleeve conductor
Distance D between inner wall of 7 and outer wall of outer conductor 5 of coaxial line 22To
If it is made smaller than the
It can be shorter than the length. Also sleeve conductor
6 is filled with the dielectric 12 between the outer conductor 5 of the coaxial line 2
As a result, the sleeve length can be further shortened.
【００２６】なお、図１の例では、アンテナ素子１１は
直線状導体となっているが、同素子は動作原理の観点か
ら、この形状に限定されるものではなく任意の形状でよ
い。また、整合回路等を用いて所望の周波数帯域内で整
合が達せられる範囲内であれば、アンテナ素子１１の電
気長は任意でよい。In the example of FIG. 1, the antenna element 11 is a linear conductor, but the element is not limited to this shape from the viewpoint of operating principle, and may have any shape. Further, the electric length of the antenna element 11 may be arbitrary as long as the matching can be achieved within a desired frequency band using a matching circuit or the like.
【００２７】また、図１の例では、同軸線路２の外導体
５と間隔Ｄ1 を保ちながらスリーブ導体６を設置し、同
軸線路２の外導体５と間隔Ｄ2 を保ちながらスリーブ導
体７を設置するものについて示したが、即ち、同軸線路
２の外導体５とスリーブ導体６，７の内壁との間隔を段
階的に変化させるものについて示したが、同軸線路２の
外導体５とスリーブ導体６，７の内壁との間隔を連続的
に変化させるようにしてもよい。ただし、この場合にお
いても、同軸線路２の外導体５とスリーブ導体６の内壁
との間隔を、同軸線路２の外導体５とスリーブ導体７の
内壁との間隔より小さくする必要がある。Further, in the example of FIG. 1, the sleeve conductor 6 is installed while keeping a distance D 1 from the outer conductor 5 of the coaxial line 2, and the sleeve conductor 7 is provided while keeping a distance D 2 from the outer conductor 5 of the coaxial line 2. Although the installed one is shown, that is, the one in which the distance between the outer conductor 5 of the coaxial line 2 and the inner walls of the sleeve conductors 6 and 7 is changed stepwise, the outer conductor 5 of the coaxial line 2 and the sleeve conductor are shown. You may make it change the space | interval with the inner wall of 6 and 7 continuously. However, also in this case, the distance between the outer conductor 5 of the coaxial line 2 and the inner wall of the sleeve conductor 6 needs to be smaller than the distance between the outer conductor 5 of the coaxial line 2 and the inner wall of the sleeve conductor 7.
【００２８】実施の形態２．図４はこの発明の実施の形
態２におけるアンテナ３を示す概略構成図であり、図に
おいて、図２と同一符号は同一または相当部分を示すの
で説明を省略する。１３は一端が携帯無線端末機の筐体
１に取り付けられているマイクロストリップ線路（平面
構造の給電線路）を構成するストリップ導体（芯線）、
１４はストリップ導体１３を含む平面に平行な異なる平
面内に配置され、そのマイクロストリップ線路を構成す
る平板状地導体（地導体）、１５はマイクロストリップ
線路の両側に所定の間隔Ｄ3 をもって設置された平板状
スリーブ導体（第１の平板状導体）、１６はマイクロス
トリップ線路の両側に所定の間隔Ｄ4 をもって設置され
た平板状スリーブ導体（第２の平板状導体）、１７は平
板状スリーブ導体１６の上端と平板状地導体１４の上端
とを電気的に接続する平板状導体である。Embodiment 2. FIG. 4 is a schematic configuration diagram showing an antenna 3 according to a second embodiment of the present invention. In the figure, the same reference numerals as those in FIG. Reference numeral 13 denotes a strip conductor (core wire) that constitutes a microstrip line (feed line having a planar structure), one end of which is attached to the housing 1 of the portable wireless terminal,
14 are arranged in different planes parallel to the plane including the strip conductor 13, and the plate-shaped ground conductors (ground conductors) constituting the microstrip line, and 15 are installed on both sides of the microstrip line with a predetermined distance D 3. Flat plate-shaped sleeve conductor (first flat plate-shaped conductor), 16 is a flat plate-shaped sleeve conductor (second flat plate-shaped conductor) installed on both sides of the microstrip line with a predetermined distance D 4 , and 17 is a flat plate-shaped sleeve conductor. It is a plate-shaped conductor that electrically connects the upper end of 16 and the upper end of the plate-shaped ground conductor 14.
【００２９】次に動作について説明する。上記実施の形
態１では、アンテナ装置が立体構造を有するものについ
て示したが、アンテナ装置が平面構造を有していてもよ
い。この実施の形態２では、給電線路として、上記実施
の形態１における同軸線路２の替わりに、ストリップ導
体１３と平板状地導体１４から成るマイクロストリップ
線路を用いている。Next, the operation will be described. Although the antenna device having the three-dimensional structure has been described in the first embodiment, the antenna device may have a planar structure. In the second embodiment, a microstrip line composed of a strip conductor 13 and a flat ground conductor 14 is used as the power supply line instead of the coaxial line 2 in the first embodiment.
【００３０】平板状地導体１４と概略同一平面内の両側
に、概略方形の平板状スリーブ導体１５，１６をそれぞ
れ１つずつ設置し、平板状スリーブ導体１５の上端と、
平板状スリーブ導体１６の下端を電気的に接続する。こ
のとき、平板状スリーブ導体１５の地導体側縁端と平板
状地導体１４との間隔Ｄ3 が、平板状スリーブ導体１６
の地導体側縁端と平板状地導体１４との間隔Ｄ4 よりも
小さくなるように設置する。また、平板状スリーブ導体
１６の上端と平板状地導体１４の上端とを細い平板状導
体１７によって電気的に接続し、平板状スリーブ導体１
５，１６、平板状導体１７及び平板状地導体１４を概略
同一平面内に配置する。また、平面状のアンテナ素子１
１とストリップ導体１３を概略同一平面内に配置する。
但し、導体１４〜１７が配置される平面と、アンテナ素
子１１および導体１３が配置される平面と異なる。On the both sides in the same plane as the plate-shaped ground conductor 14, one plate-shaped sleeve conductors 15 and 16 each having a substantially rectangular shape are installed, and the upper end of the plate-shaped sleeve conductor 15 is
The lower end of the flat plate sleeve conductor 16 is electrically connected. At this time, the distance D 3 between the ground conductor side edge of the flat plate sleeve conductor 15 and the flat plate ground conductor 14 is such that
It is installed so as to be smaller than the distance D 4 between the edge of the ground conductor on the ground conductor side and the flat ground conductor 14. Further, the upper end of the flat plate-shaped sleeve conductor 16 and the upper end of the flat plate-shaped ground conductor 14 are electrically connected by a thin flat plate-shaped conductor 17, and the flat plate-shaped sleeve conductor 1
5, 16, the flat conductor 17, and the flat ground conductor 14 are arranged in substantially the same plane. In addition, the planar antenna element 1
1 and the strip conductor 13 are arranged in substantially the same plane.
However, the plane on which the conductors 14 to 17 are arranged is different from the plane on which the antenna element 11 and the conductor 13 are arranged.
【００３１】このように、給電線路、アンテナ素子及び
スリーブ導体を平面構造とすることによって、薄い平板
状誘電体の表裏両面に薄い導体膜を有する誘電体基板に
エッチング加工を施すだけで、容易にアンテナを製作で
きるようになるとともに、アンテナ構造の薄型化を図る
ことが可能となる。また、上記実施の形態１と同様に、
平板状スリーブ導体１５と平板状地導体１４との間隙付
近を誘電体で取り巻くことにより、更なるスリーブ長の
短縮が可能となる。但し、導体１４〜１７が配置される
平面と、アンテナ素子１１および導体１３が配置される
平面と異なる。By thus forming the feed line, the antenna element, and the sleeve conductor in a planar structure, it is possible to easily perform etching processing on the dielectric substrate having thin conductor films on both front and back surfaces of the thin flat plate-shaped dielectric material. The antenna can be manufactured, and the antenna structure can be thinned. Further, as in the first embodiment,
By surrounding the gap between the flat-plate sleeve conductor 15 and the flat-plate ground conductor 14 with a dielectric, the sleeve length can be further shortened. However, the plane on which the conductors 14 to 17 are arranged is different from the plane on which the antenna element 11 and the conductor 13 are arranged.
【００３２】アンテナ素子１１もまた、整合回路等を用
いて所望の周波数で整合が達せられる範囲内であれば、
その形状、電気長は任意でよい。また、給電線路は必ず
しもマイクロストリップ線路である必要はなく、平行２
線、トリプレート線路、コプレーナ線路など、平面的な
構造を有するものであれば任意の伝送線路でよい。If the antenna element 11 is also within a range where matching can be achieved at a desired frequency using a matching circuit or the like,
The shape and electrical length may be arbitrary. Further, the power feeding line does not necessarily have to be a microstrip line, and the parallel 2
Any transmission line may be used as long as it has a planar structure such as a wire, a triplate line, and a coplanar line.
【００３３】また、図４の例では、マイクロストリップ
線路の両側に所定の間隔Ｄ3 をもって平板状スリーブ導
体１５を設置し、マイクロストリップ線路の両側に所定
の間隔Ｄ4 をもって平板状スリーブ導体１６を設置する
ものについて示したが、即ち、マイクロストリップ線路
と平板状スリーブ導体１５，１６との間隔を段階的に変
化させるものについて示したが、マイクロストリップ線
路と平板状スリーブ導体１５，１６との間隔を連続的に
変化させるようにしてもよい。ただし、この場合におい
ても、マイクロストリップ線路と平板状スリーブ導体１
５との間隔を、マイクロストリップ線路と平板状スリー
ブ導体１６との間隔より小さくする必要がある。Further, in the example of FIG. 4, the plate-like sleeve conductor 15 is placed at a predetermined distance D 3 to both sides of the microstrip line, the tabular sleeve conductor 16 with a predetermined gap D 4 on both sides of the microstrip line Although the installation is shown, that is, the space between the microstrip line and the flat sleeve conductors 15 and 16 is changed stepwise, the space between the microstrip line and the flat sleeve conductors 15 and 16 is shown. May be changed continuously. However, even in this case, the microstrip line and the flat sleeve conductor 1
It is necessary to make the space between the microstrip line 5 and the plate-shaped sleeve conductor 16 smaller than the space between the microstrip line and the flat sleeve conductor 16.
【００３４】実施の形態３．図５はこの発明の実施の形
態３におけるアンテナ３を示す概略構成図であり、図に
おいて、図４と同一符号は同一または相当部分を示すの
で説明を省略する。１８は平板状スリーブ導体１５，１
６の外側に所定の間隔Ｄ5 をもって設置された平板状ス
リーブ導体（第３の平板状導体）、１９は平板状スリー
ブ導体１５，１６の外側に所定の間隔Ｄ6 をもって設置
された平板状スリーブ導体（第４の平板状導体）、２０
は平板状スリーブ導体１９の上端と平板状スリーブ導体
１６の上端とを電気的に接続する平板状導体である。Embodiment 3. 5 is a schematic configuration diagram showing an antenna 3 according to a third embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 18 is a flat plate sleeve conductor 15, 1
6 outside placed at a predetermined distance D 5 tabular sleeve conductor (third plate-like conductor), 19 tabular sleeve placed at a predetermined distance D 6 on the outside of the plate-like sleeve conductor 15, 16 Conductor (fourth flat conductor), 20
Is a plate-shaped conductor that electrically connects the upper end of the plate-shaped sleeve conductor 19 and the upper end of the plate-shaped sleeve conductor 16.
【００３５】次に動作について説明する。上記実施の形
態２では、マイクロストリップ線路の両側に平板状スリ
ーブ導体１５，１６を設置するものについて示したが、
さらに、平板状スリーブ導体１５，１６の外側に、平板
状スリーブ導体１８，１９を設置するようにしてもよ
い。Next, the operation will be described. In the second embodiment, the flat sleeve conductors 15 and 16 are installed on both sides of the microstrip line, but
Further, the flat plate sleeve conductors 18 and 19 may be installed outside the flat plate sleeve conductors 15 and 16.
【００３６】即ち、第一の周波数に作用する平板状スリ
ーブ導体１５，１６の外側に、それらと概略同一平面
上、かつ、それらと長さが異なり、第二の周波数に作用
する平板状スリーブ導体１８，１９を設置する。また、
平板状スリーブ導体１８の上端と平板状スリーブ導体１
９の下端とを電気的に接続し、平板状スリーブ導体１９
の上端と平板状スリーブ導体１６の上端とを細い平板状
導体２０によって電気的に接続する。That is, on the outside of the flat plate sleeve conductors 15 and 16 which act on the first frequency, the flat plate sleeve conductors which are substantially on the same plane as them but different in length from them and which act on the second frequency. 18 and 19 are installed. Also,
The upper end of the flat plate sleeve conductor 18 and the flat plate sleeve conductor 1
9 is electrically connected to the lower end of the flat plate sleeve conductor 19
And the upper end of the flat plate-shaped sleeve conductor 16 are electrically connected by a thin flat plate-shaped conductor 20.
【００３７】平板状スリーブ導体１５，１６の外側縁端
と平板状スリーブ導体１８の内側縁端との間隔Ｄ5 は、
必ずしも平板状スリーブ導体１５，１６の外側縁端と平
板状スリーブ導体１９の内側縁端との間隔Ｄ6 より小さ
くする必要はなく、平板状スリーブ導体１８の下端から
平板状スリーブ導体１９の上端までの距離が、平板状ス
リーブ導体１５の下端から平板状スリーブ導体１６の上
端までの距離よりも小さい範囲で、第二の周波数に対す
る電流阻止効果が得られれば、間隔Ｄ5 と間隔Ｄ6 は同
一であってもよい。それ以外の場合には、間隔Ｄ5 が間
隔Ｄ6 よりも小さくなるように設置する。上記のような
構成にすることによって、異なる２つの周波数に対して
動作させることが可能となる。The distance D 5 between the outer edge of the flat plate sleeve conductors 15 and 16 and the inner edge of the flat plate sleeve conductor 18 is
It is not always necessary to make it smaller than the distance D 6 between the outer edges of the flat plate sleeve conductors 15 and 16 and the inner edge of the flat plate sleeve conductor 19, and from the lower end of the flat plate sleeve conductor 18 to the upper end of the flat plate sleeve conductor 19. Is smaller than the distance from the lower end of the flat plate sleeve conductor 15 to the upper end of the flat plate sleeve conductor 16 and the current blocking effect for the second frequency is obtained, the distance D 5 and the distance D 6 are the same. May be In other cases, the distance D 5 is set smaller than the distance D 6 . With the above configuration, it is possible to operate for two different frequencies.
【００３８】実施の形態４．上記実施の形態３では、平
板状スリーブ導体１５，１６の外側に、平板状スリーブ
導体１８，１９を設置するものについて示したが、図６
に示すように、給電線路の左側には平板状スリーブ導体
１５，１６を設置して、給電線路の右側には平板状スリ
ーブ導体１８，１９（この場合、平板状スリーブ導体１
８，１９は第１及び第２の平板状導体を構成する）を設
置するようにしてもよい。このようにすることによっ
て、スリーブアンテナの幅を狭くすることが可能とな
る。Fourth Embodiment Although the flat sleeve conductors 18 and 19 are provided outside the flat sleeve conductors 15 and 16 in the third embodiment, FIG.
As shown in FIG. 5, flat plate sleeve conductors 15 and 16 are installed on the left side of the feed line, and flat plate sleeve conductors 18 and 19 (in this case, the flat plate sleeve conductor 1 are provided on the right side of the feed line.
8 and 19 constitute the first and second flat plate-shaped conductors). By doing so, the width of the sleeve antenna can be narrowed.
【００３９】[0039]
【発明の効果】以上のように、この発明によれば、第１
の円筒状導体が第２の円筒状導体より無線機の筐体側に
設置されている場合、同軸線路に対する第１の円筒状導
体の間隔を、同軸線路に対する第２の円筒状導体の間隔
より小さくするように構成したので、使用周波数に拘わ
らず、無線機の筐体内に収納することが可能な小型のア
ンテナ装置を得ることができる効果がある。As described above, according to the present invention, the first
When the cylindrical conductor of 1 is installed closer to the casing of the radio device than the second cylindrical conductor, the distance between the first cylindrical conductor and the coaxial line is smaller than the distance between the second cylindrical conductor and the coaxial line. With this configuration, there is an effect that it is possible to obtain a small antenna device that can be housed in the housing of the wireless device regardless of the used frequency.
【００４０】この発明によれば、第１の円筒状導体と同
軸線路の間に誘電体を充填するように構成したので、更
なるスリーブ長の短縮が可能となる効果がある。According to the present invention, since the dielectric is filled between the first cylindrical conductor and the coaxial line, there is an effect that the sleeve length can be further shortened.
【００４１】この発明によれば、第１の平板状導体が第
２の平板状導体より無線機の筐体側に設置されている場
合、給電線路に対する第１の平板状導体の間隔を、給電
線路に対する第２の平板状導体の間隔より小さくするよ
うに構成したので、使用周波数に拘わらず、無線機の筐
体内に収納することが可能な小型のアンテナ装置を得る
ことができる効果がある。According to the present invention, when the first flat plate-shaped conductor is installed closer to the casing of the radio device than the second flat plate-shaped conductor, the distance between the first flat plate-shaped conductor and the feed line is set to the feed line. Since the distance between the second flat conductor and the second flat conductor is smaller than that of the second flat conductor, it is possible to obtain a small antenna device that can be housed in the housing of the radio regardless of the used frequency.
【００４２】この発明によれば、第１の平板状導体と給
電線路の間に誘電体を充填するように構成したので、更
なるスリーブ長の短縮が可能となる効果がある。According to the present invention, since the dielectric is filled between the first flat conductor and the feed line, there is an effect that the sleeve length can be further shortened.
【００４３】この発明によれば、第１及び第２の平板状
導体の外側に所定の間隔をもって、第１及び第２の平板
状導体と長さが異なる第３及び第４の平板状導体を設置
するように構成したので、異なる２つの周波数に対して
動作させることができる効果がある。According to the present invention, the third and fourth flat plate conductors having different lengths from the first and second flat plate conductors are provided outside the first and second flat plate conductors at a predetermined interval. Since it is configured to be installed, there is an effect that it can be operated for two different frequencies.
【００４４】この発明によれば、第３の平板状導体が第
４の平板状導体より無線機の筐体側に設置されている場
合、第１及び第２の平板状導体に対する第３の平板状導
体の間隔を、第１及び第２の平板状導体に対する第４の
平板状導体の間隔より小さくするように構成したので、
更なるスリーブ長の短縮が可能となる効果がある。According to the present invention, when the third plate-shaped conductor is installed closer to the casing of the radio device than the fourth plate-shaped conductor, the third plate-shaped conductor with respect to the first and second plate-shaped conductors is used. Since the distance between the conductors is configured to be smaller than the distance between the fourth flat conductor and the first and second flat conductors,
There is an effect that the sleeve length can be further shortened.
【００４５】この発明によれば、給電線路の左側に設置
する第１及び第２の平板状導体の長さと、給電線路の右
側に設置する第１及び第２の平板状導体の長さを変える
ように構成したので、スリーブアンテナの幅を狭くする
ことができる効果がある。According to the present invention, the lengths of the first and second plate-shaped conductors installed on the left side of the feed line and the lengths of the first and second plate-shaped conductors installed on the right side of the feed line are changed. With this structure, the width of the sleeve antenna can be reduced.
【００４６】この発明によれば、同軸線路の外壁と円筒
状導体の内壁との間隔を連続的又は段階的に変化させる
ように構成したので、使用周波数に拘わらず、無線機の
筐体内に収納することが可能な小型のアンテナ装置を得
ることができる効果がある。According to the present invention, since the distance between the outer wall of the coaxial line and the inner wall of the cylindrical conductor is changed continuously or stepwise, it is accommodated in the housing of the radio regardless of the frequency used. There is an effect that it is possible to obtain a small-sized antenna device that can be used.
【００４７】この発明によれば、円筒状導体の筐体側の
端部における同軸線路の外壁と円筒状導体の内壁との間
隔を、円筒状導体の筐体側と反対の端部における同軸線
路の外壁と円筒状導体の内壁との間隔より小さくするよ
うに構成したので、使用周波数に拘わらず、無線機の筐
体内に収納することが可能な小型のアンテナ装置を得る
ことができる効果がある。According to the present invention, the interval between the outer wall of the coaxial conductor and the inner wall of the cylindrical conductor at the end of the cylindrical conductor on the side of the housing is set to the outer wall of the coaxial line at the end opposite to the side of the cylindrical conductor on the side of the housing. Since it is configured to be smaller than the interval between the inner wall of the cylindrical conductor and the inner wall of the cylindrical conductor, it is possible to obtain a small antenna device that can be housed in the housing of the radio regardless of the frequency used.
【００４８】この発明によれば、給電線路と平板状導体
との間隔を連続的又は段階的に変化させるように構成し
たので、使用周波数に拘わらず、無線機の筐体内に収納
することが可能な小型のアンテナ装置を得ることができ
る効果がある。According to the present invention, since the distance between the feed line and the flat conductor is changed continuously or stepwise, it can be housed in the housing of the radio regardless of the frequency used. There is an effect that a compact small antenna device can be obtained.
【００４９】この発明によれば、給電線路の筐体側の端
部における給電線路と平板状導体との間隔を、給電線路
の筐体側と反対の端部における給電線路と平板状導体と
の間隔より小さくするように構成したので、使用周波数
に拘わらず、無線機の筐体内に収納することが可能な小
型のアンテナ装置を得ることができる効果がある。According to the present invention, the distance between the feed line and the plate-shaped conductor at the end of the feed line on the side of the housing is set to be smaller than the distance between the feed line and the plate-shaped conductor at the end of the feed line opposite to the side of the case. Since it is configured to be small, there is an effect that it is possible to obtain a small antenna device that can be housed in the housing of the radio regardless of the used frequency.
【図１】 この発明の実施の形態１によるアンテナ装置
を示す斜視図である。FIG. 1 is a perspective view showing an antenna device according to a first embodiment of the present invention.
【図２】 （ａ）はアンテナを示す拡大立体図、（ｂ）
はアンテナを示す拡大断面図である。FIG. 2A is an enlarged three-dimensional view showing an antenna, and FIG.
FIG. 4 is an enlarged cross-sectional view showing an antenna.
【図３】 スリーブ導体の長さＬ2 をパラメータとし
て、インピーダンス比Ｚ2 ／Ｚ1 を横軸、スリーブ導体
の全長を縦軸にとったグラフ図である。FIG. 3 is a graph showing the impedance ratio Z 2 / Z 1 as the horizontal axis and the total length of the sleeve conductor as the vertical axis with the length L 2 of the sleeve conductor as a parameter.
【図４】 この発明の実施の形態２におけるアンテナを
示す概略構成図である。FIG. 4 is a schematic configuration diagram showing an antenna according to a second embodiment of the present invention.
【図５】 この発明の実施の形態３におけるアンテナを
示す概略構成図である。FIG. 5 is a schematic configuration diagram showing an antenna according to a third embodiment of the present invention.
【図６】 この発明の実施の形態４におけるアンテナを
示す概略構成図である。FIG. 6 is a schematic configuration diagram showing an antenna according to a fourth embodiment of the present invention.
１ 携帯無線端末機（無線機）の筐体、２ 同軸線路、
３ アンテナ、４ 同軸線路２の内導体、５ 同軸線路
２の外導体、６ スリーブ導体（第１の円筒状導体）、
７ スリーブ導体（第２の円筒状導体）、８ 環状導体
板、９ 環状導体板、１０ 給電点、１１ アンテナ素
子、１２ 誘電体、１３ ストリップ導体（芯線）、１
４ 平板状地導体（地導体）、１５ 平板状スリーブ導
体（第１の平板状導体）、１６ 平板状スリーブ導体
（第２の平板状導体）、１７ 平板状導体、１８ 平板
状スリーブ導体（第３の平板状導体）、１９ 平板状ス
リーブ導体（第４の平板状導体）、２０ 平板状導体。1 mobile wireless terminal (radio) housing, 2 coaxial line,
3 antenna, 4 inner conductor of coaxial line 2, 5 outer conductor of coaxial line 2, 6 sleeve conductor (first cylindrical conductor),
7 sleeve conductor (second cylindrical conductor), 8 annular conductor plate, 9 annular conductor plate, 10 feeding point, 11 antenna element, 12 dielectric, 13 strip conductor (core wire), 1
4 flat-plate ground conductor (ground conductor), 15 flat-plate sleeve conductor (first flat-plate conductor), 16 flat-plate sleeve conductor (second flat-plate conductor), 17 flat-plate conductor, 18 flat-plate sleeve conductor (first) 3 plate-shaped conductor), 19 plate-shaped sleeve conductors (4th plate-shaped conductor), 20 plate-shaped conductors.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 牧野 滋 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 砂原 米彦 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 今西 康人 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 Ｆターム(参考） 5J046 AA01 AA07 AA13 AB06 DA03 5J047 AA01 AA07 AA13 AB06 FA10 FD01 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Shigeru Makino 2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo Inside Ryo Electric Co., Ltd. (72) Inventor Yonehiko Sunahara 2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo Inside Ryo Electric Co., Ltd. (72) Inventor Yasuto Imanishi 2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo Inside Ryo Electric Co., Ltd. F term (reference) 5J046 AA01 AA07 AA13 AB06 DA03 5J047 AA01 AA07 AA13 AB06 FA10 FD01
Claims (11)
軸線路と、上記同軸線路と所定の間隔を保ちながら、上
記同軸線路を取り囲むように設置された第１及び第２の
円筒状導体とを備えたアンテナ装置において、上記第１
の円筒状導体が上記第２の円筒状導体より上記無線機の
筐体側に設置されている場合、上記同軸線路に対する上
記第１の円筒状導体の間隔を、上記同軸線路に対する上
記第２の円筒状導体の間隔より小さくすることを特徴と
するアンテナ装置。1. A coaxial line having one end attached to a casing of a radio device, and first and second cylindrical conductors installed so as to surround the coaxial line while keeping a predetermined distance from the coaxial line. And an antenna device including:
When the cylindrical conductor of (1) is installed closer to the housing side of the radio device than the second cylindrical conductor, the distance between the first cylindrical conductor and the coaxial line is set to the second cylinder with respect to the coaxial line. An antenna device characterized in that it is smaller than the interval between the conductors.
体を充填することを特徴とする請求項１記載のアンテナ
装置。2. The antenna device according to claim 1, wherein a dielectric is filled between the first cylindrical conductor and the coaxial line.
つ以上の平面導体から成る平面構造の給電線路と、上記
給電線路の両側に所定の間隔をもって設置された第１及
び第２の平板状導体とを備えたアンテナ装置において、
上記第１の平板状導体が上記第２の平板状導体より上記
無線機の筐体側に設置されている場合、上記給電線路に
対する上記第１の平板状導体の間隔を、上記給電線路に
対する上記第２の平板状導体の間隔より小さくすること
を特徴とするアンテナ装置。3. One end is attached to the housing of the radio, and 2
An antenna device comprising: a feed line having a planar structure composed of one or more plane conductors; and first and second flat plate-like conductors provided on both sides of the feed line at a predetermined interval,
When the first flat plate-shaped conductor is installed closer to the casing of the radio device than the second flat plate-shaped conductor, the distance between the first flat plate-shaped conductor and the feed line is the same as the first flat plate conductor. An antenna device characterized in that the distance is smaller than the distance between the two flat conductors.
体を充填することを特徴とする請求項３記載のアンテナ
装置。4. The antenna device according to claim 3, wherein a dielectric is filled between the first flat conductor and the feed line.
の間隔をもって、上記第１及び第２の平板状導体と長さ
が異なる第３及び第４の平板状導体を設置することを特
徴とする請求項３記載のアンテナ装置。5. The third and fourth flat plate conductors having different lengths from the first and second flat plate conductors are provided outside the first and second flat plate conductors at a predetermined interval. The antenna device according to claim 3, wherein:
り無線機の筐体側に設置されている場合、第１及び第２
の平板状導体に対する上記第３の平板状導体の間隔を、
上記第１及び第２の平板状導体に対する上記第４の平板
状導体の間隔より小さくすることを特徴とする請求項５
記載のアンテナ装置。6. When the third flat conductor is installed closer to the casing of the radio device than the fourth flat conductor, the first and second flat conductors are provided.
The distance between the third flat plate conductor and the flat plate conductor of
6. The distance between the first flat conductor and the second flat conductor is smaller than the distance between the fourth flat conductor and the fourth flat conductor.
The antenna device described.
の平板状導体の長さと、上記給電線路の右側に設置する
第１及び第２の平板状導体の長さを変えることを特徴と
する請求項３記載のアンテナ装置。7. A first and a second installed on the left side of the power supply line.
4. The antenna device according to claim 3, wherein the length of the flat conductor and the length of the first and second flat conductors installed on the right side of the feed line are changed.
軸線路と、上記同軸線路と所定の間隔を保ちながら、上
記同軸線路を取り囲むように設置された円筒状導体とを
備えたアンテナ装置において、上記同軸線路の外壁と上
記円筒状導体の内壁との間隔を連続的又は段階的に変化
させたことを特徴とするアンテナ装置。8. An antenna device comprising: a coaxial line whose one end is attached to a housing of a radio device; and a cylindrical conductor installed so as to surround the coaxial line while keeping a predetermined distance from the coaxial line. In the antenna device, the distance between the outer wall of the coaxial line and the inner wall of the cylindrical conductor is continuously or stepwise changed.
線路の外壁と上記円筒状導体の内壁との間隔を、上記円
筒状導体の筐体側と反対の端部における上記同軸線路の
外壁と上記円筒状導体の内壁との間隔より小さくするこ
とを特徴とする請求項８記載のアンテナ装置。9. The outer wall of the coaxial conductor at the end of the cylindrical conductor on the housing side and the inner wall of the cylindrical conductor are spaced from the outer wall of the coaxial line at the end opposite to the housing of the cylindrical conductor. 9. The antenna device according to claim 8, wherein the distance is smaller than the distance from the inner wall of the cylindrical conductor.
２つ以上の平面導体から成る平面構造の給電線路と、上
記給電線路の両側に所定の間隔をもって設置された平板
状導体とを備えたアンテナ装置において、上記給電線路
と上記平板状導体との間隔を連続的又は段階的に変化さ
せたことを特徴とするアンテナ装置。10. One end is attached to a radio housing,
In an antenna device provided with a feed line having a planar structure composed of two or more plane conductors and a plate-like conductor installed on both sides of the feed line at a predetermined interval, the gap between the feed line and the plate-like conductor An antenna device, characterized in that it is changed continuously or stepwise.
給電線路と平板状導体との間隔を、上記給電線路の筐体
側と反対の端部における上記給電線路と上記平板状導体
との間隔より小さくすることを特徴とする請求項１０記
載のアンテナ装置。11. The distance between the feed line and the plate-shaped conductor at the end of the feed line on the side of the housing is calculated from the distance between the feed line and the plate-shaped conductor at the end of the feed line opposite to the side of the case. The antenna device according to claim 10, wherein the antenna device is reduced in size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001258154A JP2003069326A (en) | 2001-08-28 | 2001-08-28 | Antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001258154A JP2003069326A (en) | 2001-08-28 | 2001-08-28 | Antenna system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003069326A true JP2003069326A (en) | 2003-03-07 |
Family
ID=19085725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001258154A Pending JP2003069326A (en) | 2001-08-28 | 2001-08-28 | Antenna system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003069326A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007049213A (en) * | 2004-12-03 | 2007-02-22 | Mitsubishi Electric Corp | Antenna system |
-
2001
- 2001-08-28 JP JP2001258154A patent/JP2003069326A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007049213A (en) * | 2004-12-03 | 2007-02-22 | Mitsubishi Electric Corp | Antenna system |
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