JPH06224618A - Self-impedance variable active antenna - Google Patents
Self-impedance variable active antennaInfo
- Publication number
- JPH06224618A JPH06224618A JP5012272A JP1227293A JPH06224618A JP H06224618 A JPH06224618 A JP H06224618A JP 5012272 A JP5012272 A JP 5012272A JP 1227293 A JP1227293 A JP 1227293A JP H06224618 A JPH06224618 A JP H06224618A
- Authority
- JP
- Japan
- Prior art keywords
- self
- antenna
- switch
- active antenna
- coupled
- 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
(57)【要約】
【構成】筐体，反射板等の仮想地盤５上に形成された、
線状或いは板状導体１で構成されるアンテナを、仮想地
盤５を接地電位に持つ給電点３で励振し、仮想地盤５上
に一つ或いは複数の容量を形成し、容量の非接地電極と
スイッチ４の一端を結合し、スイッチ４の他端を、一つ
の或いは複数の点で板状導体１に電気的に結合する。
【効果】アクティブアンテナの自己インピーダンスを可
変にすることで端末の使用環境が変化しても高周波部と
の良好なインピーダンス整合条件を維持できる。
(57) [Summary] [Structure] Formed on the virtual ground 5 such as a housing and a reflector,
The antenna composed of the linear or plate-shaped conductor 1 is excited at the feeding point 3 having the virtual ground 5 at the ground potential to form one or a plurality of capacitors on the virtual ground 5, and the non-grounded electrode of the capacitor is formed. One end of the switch 4 is coupled, and the other end of the switch 4 is electrically coupled to the plate conductor 1 at one or a plurality of points. [Effect] By making the self-impedance of the active antenna variable, a good impedance matching condition with the high frequency unit can be maintained even if the usage environment of the terminal changes.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、使用波長に比べて筐体
寸法が同程度以下の携帯移動端末等の、使用状態により
アンテナ近傍の電磁界環境が変化する小型携帯端末に適
用されるアンテナに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an antenna applied to a small mobile terminal in which the electromagnetic field environment near the antenna changes depending on the usage condition, such as a mobile mobile terminal having a housing size equal to or smaller than the wavelength used. Regarding
【０００２】[0002]
【従来の技術】使用波長に比べて筐体寸法が同程度以下
の携帯移動端末では、筐体が不完全な接地板として動作
するため、端末使用者の姿勢，端末の持ち方等の使用環
境に依存してアンテナの入力インピーダンスは相当量変
化する。従って、端末内の高周波部とアンテナとの整合
状態が大きく変化し、通信に必要な電磁波エネルギの端
末からの効率よい放射が阻害され、通信感度劣化，端末
消費電力の低下の問題が生じる。この問題点を解決する
ため、アンテナの自己インピーダンスを可変とすべく、
従来、アンテナの一部にアクティブ回路を挿入する方法
（特開昭63−294107号）、またそのアクティブ回路とし
てスイッチを用いた場合の具体構造（特開平1−318416
号）の提案がなされている。2. Description of the Related Art In a portable mobile terminal having a housing size equal to or smaller than the used wavelength, the housing operates as an incomplete grounding plate, so that the usage environment such as the attitude of the terminal user and the way of holding the terminal. Depending on, the input impedance of the antenna changes considerably. Therefore, the matching state between the high frequency part in the terminal and the antenna changes greatly, the efficient radiation of electromagnetic wave energy required for communication from the terminal is disturbed, and there arise problems of deterioration of communication sensitivity and reduction of terminal power consumption. In order to solve this problem, in order to make the self-impedance of the antenna variable,
Conventionally, a method of inserting an active circuit into a part of an antenna (Japanese Patent Laid-Open No. 63-294107) and a specific structure using a switch as the active circuit (Japanese Patent Laid-Open No. 1-318416)
No.) has been proposed.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術では、通
信中にスイッチ等のアクティブ回路が常時動作するた
め、アクティブ回路を含むアクティブアンテナ全体の良
好な線形性が要求され、特に、ディジタル回路等で頻繁
に採用される振幅変調方式では、この要求は厳しくな
る。この要求に対して、アクティブ回路の線形性の保証
を一般に容易に実現する手段はなく、新たな回路の別設
置などコスト高，寸法増加が生じる問題があった。In the above-mentioned prior art, since active circuits such as switches always operate during communication, good linearity of the entire active antenna including the active circuits is required, and particularly in digital circuits and the like. With the frequently adopted amplitude modulation schemes, this requirement becomes more stringent. In response to this demand, there is generally no means for easily realizing the linearity guarantee of the active circuit, and there is a problem in that the cost is increased and the size is increased due to a separate installation of a new circuit.
【０００４】[0004]
【課題を解決するための手段】本発明は筐体，反射板等
の仮想地盤上に形成された、線状或いは板状導体で構成
されるアンテナにおいて、前記仮想地盤を接地電位に持
つ給電点と、前記仮想地盤上に形成された一つ或いは複
数の容量と、前記容量の非接地電極と一端を結合された
スイッチの他の一端と結合する一つの或いは複数の点を
有する構造を用いて、要量の値を端末使用状況の変化に
応じて変化させる。DISCLOSURE OF THE INVENTION The present invention relates to an antenna composed of a linear or plate-shaped conductor formed on a virtual ground such as a casing or a reflector, and a feeding point having the virtual ground at a ground potential. And a structure having one or a plurality of capacitors formed on the virtual ground and one or a plurality of points connecting one end of the capacitor and the other end of the switch having one end connected to the non-ground electrode. , The value of the required amount is changed according to the change in the terminal usage situation.
【０００５】[0005]
【作用】仮想地盤上に形成された導体と、地盤との間に
容量が挿入されると、その部分に電界のエネルギが局所
的に蓄積される。給電部からアンテナに印加された電磁
エネルギは導体に沿って伝搬しながら外部空間に放射さ
れる。したがって、電磁エネルギが導体上の一部分に蓄
積されるということは、その部分での電磁エネルギの伝
搬時間の遅延が生じることになり、等価的に電磁エネル
ギが伝搬する行路が伸びたことになる。When a capacitance is inserted between the conductor formed on the virtual ground and the ground, the electric field energy is locally accumulated at that portion. Electromagnetic energy applied to the antenna from the power feeding unit is radiated to the external space while propagating along the conductor. Therefore, the fact that the electromagnetic energy is accumulated in a part on the conductor means that the propagation time of the electromagnetic energy in the part is delayed, and the path through which the electromagnetic energy propagates is equivalently extended.
【０００６】仮想地盤上に形成された導体からなるアン
テナはその長さにより自己インピーダンスが変化するか
ら、地盤との間に挿入される容量の値を変えて、導体の
一部に蓄積されるエネルギの割合を変えることにより、
等価的に導体の電気長が変化することになり給電点から
見た自己インピーダンスを変えることができる。このイ
ンピーダンス可変の手続きは、一回のスイッチの切り替
えによりなされるので、通信に要する時間に占める非線
形動作時間の割合は極めて小さい。また、一旦、インピ
ーダンスの可変が行われると、その後は、導体からなる
線形受動素子と考えられるアンテナと元々受動素子であ
る容量とでアクティブアンテナが構成されるので、動作
の線形性はおのずから保証される。Since the self-impedance of an antenna made of a conductor formed on the virtual ground changes depending on its length, the value of the capacitance inserted between the antenna and the ground is changed, and the energy stored in a part of the conductor is changed. By changing the ratio of
Equivalently, the electrical length of the conductor changes, and the self impedance seen from the feeding point can be changed. Since this impedance changing procedure is performed by switching the switch once, the ratio of the non-linear operation time to the time required for communication is extremely small. Further, once the impedance is changed, thereafter, the active antenna is composed of the antenna, which is considered to be a linear passive element made of a conductor, and the capacitance which is originally a passive element, and therefore the linearity of the operation is naturally guaranteed. It
【０００７】更に、本アクティブアンテナの放射導体以
外の構成部品は、制御部を除けば、容量とスイッチであ
り、構造も簡単で低コストで実現できる。また、これら
の部品は半導体プロセスの適用が容易に可能で、小型化
・量産効果によるコストダウンが果たせ、小型で安価な
携帯端末に適用できるアンテナを実現できる。Further, the components other than the radiation conductor of the active antenna are the capacitance and the switch except for the control unit, and the structure is simple and can be realized at low cost. Moreover, semiconductor components can be easily applied to these components, cost reduction can be achieved due to miniaturization and mass production effects, and an antenna that can be applied to a small and inexpensive mobile terminal can be realized.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図１により説明す
る。図１は本発明による自己インピーダンス可変アクテ
ィブアンテナの一実施例の斜視図であり、筐体等の仮想
地盤５の上方に板状導体で構成されるアンテナ１が配置
され、アンテナは仮想地盤に接地電位を有する励振源６
と給電点３で結合し、仮想地盤との間にスイッチ４と結
合した容量２を複数異なる点で結合する構造をなす。複
数のスイッチ４のオン−オフの組合せにより、板状導体
１を伝搬する電磁エネルギが一部蓄積される場所及び量
が異なるので、給電点から伝搬を始める電磁エネルギ進
行の航路差が異なり、等価的に給電点からみた板状導体
の電気長が変化し、アンテナの自己インピーダンスを変
化させることができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a perspective view of an embodiment of a variable self-impedance active antenna according to the present invention, in which an antenna 1 made of a plate-shaped conductor is arranged above a virtual ground 5 such as a housing, and the antenna is grounded to the virtual ground. Excitation source 6 with potential
Is connected at the feeding point 3 and the capacity 2 connected to the switch 4 is connected to the virtual ground at a plurality of different points. Depending on the combination of ON / OFF of the plurality of switches 4, the place and the amount of the electromagnetic energy propagating through the plate-shaped conductor 1 are partly different, so that the difference in the route of the electromagnetic energy starting to propagate from the feeding point is different and the equivalent. The electric length of the plate-shaped conductor as viewed from the feeding point is changed, and the self-impedance of the antenna can be changed.
【０００９】図２は本発明による自己インピーダンス可
変アクティブアンテナの他の実施例の斜視図であり、図
１と異なる点は、スイッチ４と結合した複数の容量が、
板状導体の同一の点で結合されているところである。本
実施例によれば、容量の値がスイッチを介して結合さて
いる点で、スイッチのオン−オフの組合せにより変化す
るため、この点で板状導体上を伝搬している電磁エネル
ギの蓄積量が異なり、これにより電磁エネルギ進行の航
路差が変わり、自己インピーダンスを変化することがで
きる。本実施例では、板状導体とスイッチとの結合点を
減少させることができるので、構造の強度を増すことが
できる。FIG. 2 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention. The difference from FIG. 1 is that a plurality of capacitors coupled to the switch 4 are
It is where the plate conductors are connected at the same point. According to this embodiment, since the capacitance value changes depending on the combination of ON and OFF of the switch at the point where the capacitance is coupled through the switch, the accumulated amount of electromagnetic energy propagating on the plate conductor at this point. Are different from each other, which changes the route difference in the progress of electromagnetic energy, and can change the self-impedance. In this embodiment, the number of connecting points between the plate conductor and the switch can be reduced, so that the strength of the structure can be increased.
【００１０】図３は本発明による自己インピーダンス可
変アクティブアンテナの他の実施例の斜視図であり、図
１と異なるのは、板状導体に結合するスイッチと容量の
組が一つである点である。本実施例では、自己インピー
ダンスの値は二つの値しか取らず可変幅が小さい。しか
し、本アクティブアンテナを適用する端末が使用される
システム周波数帯域に比べて、板状導体５からなるアン
テナが比較的広い帯域を持つ場合、自己インピーダンス
の変化幅は少なくてすむ。この場合、本実施例を採用す
ることにより部品点数の削減が可能で生産コストを下げ
る効果がある。FIG. 3 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention, which is different from FIG. 1 in that there is one set of switch and capacitor coupled to the plate conductor. is there. In this embodiment, the value of self-impedance takes only two values and the variable width is small. However, when the antenna formed of the plate-shaped conductor 5 has a relatively wide band as compared with the system frequency band in which the terminal to which the present active antenna is applied is used, the change width of the self impedance can be small. In this case, the number of parts can be reduced and the production cost can be reduced by adopting this embodiment.
【００１１】図４は本発明による自己インピーダンス可
変アクティブアンテナの他の実施例の斜視図であり、図
１と異なるのは、アンテナが板状導体ではなく、線状導
体７で構成される点である。本実施例によれば、板状導
体を採用する場合に比べてアンテナ自身の周波数帯域は
狭くなるものの、アンテナ形状をより自由に選べるた
め、本アクティブアンテナを適用する端末が使用される
システム中心周波数にアンテナの中心周波数を容易に一
致させることができ、システムの周波数帯域が比較的狭
い場合、設計工数の低減による製品開発機関短縮の効果
がある。FIG. 4 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention, which is different from FIG. 1 in that the antenna is not a plate-shaped conductor but a linear conductor 7. is there. According to the present embodiment, although the frequency band of the antenna itself is narrower than that in the case of adopting the plate conductor, the antenna shape can be selected more freely, and therefore the system center frequency in which the terminal to which the active antenna is applied is used. Since the center frequencies of the antennas can be easily matched with each other and the frequency band of the system is relatively narrow, there is an effect of shortening the product development organization by reducing the design man-hours.
【００１２】図５は本発明による自己インピーダンス可
変アクティブアンテナの他の実施例の斜視図であり、図
２と異なるのは容量の仮想地盤接地されていない電極と
板状導体で構成されるアンテナとを結合するスイッチが
２枝分岐スイッチの階層構造による多段結合で構成され
ている点である。本実施例によれば、２枝分岐スイッチ
の階層構造による多段結合を採用しない場合に比べてス
イッチの組合せにより、より多くの種類の容量値を実現
することができるので、自己インピーダンスの可変幅を
増大させる。FIG. 5 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention. The difference from FIG. 2 is that the antenna is composed of an electrode which is not grounded to the virtual ground and a plate-shaped conductor. This is that the switch connecting the two is configured by a multi-stage connection having a hierarchical structure of two-branch branch switches. According to the present embodiment, more kinds of capacitance values can be realized by combining the switches as compared with the case where the multi-stage coupling by the hierarchical structure of the two-branch branch switch is not adopted, so that the variable width of the self impedance can be reduced. Increase.
【００１３】図６は本発明による自己インピーダンス可
変アクティブアンテナの他の実施例の斜視図であり、図
５と異なるのは２枝分岐スイッチの階層構造による多段
結合で構成されるスイッチの最下層枝につながる容量の
各々の値が、２の冪乗系列をなす点である。本実施例に
よれば、２枝分岐スイッチの階層構造による多段結合の
スイッチの組合せにより、最も少ない全容量値の和で等
間隔最大種の容量値を実現することができる。このた
め、一度スイッチと容量の結合構成を決めておけば、本
アクティブアンテナを適用する端末が使用される種々の
システムに対して、スイッチの組合せのみを変化するこ
とにより、本アクティブアンテナの自己インピーダンス
可変域を設定することが可能となり、同一品目量産効果
によるコスト減と、他システム対応製品の開発期間短縮
に効果がある。FIG. 6 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention, which is different from FIG. 5 in that the lowest layer branch of the switch constituted by the multi-stage coupling by the hierarchical structure of the two-branch branch switch. Each value of the capacity connected to is a power of 2 point. According to the present embodiment, by combining the switches of the multi-stage coupling with the hierarchical structure of the two-branch branch switch, it is possible to realize the maximum equidistant-type capacitance value with the smallest sum of all capacitance values. Therefore, once the switch-capacitance coupling configuration is determined, the self-impedance of the active antenna can be changed by changing only the switch combination for various systems in which the terminal to which the active antenna is applied is used. The variable range can be set, which is effective in reducing costs due to mass production of the same item and shortening the development period of products compatible with other systems.
【００１４】図７は本発明による自己インピーダンス可
変アクティブアンテナの他の実施例の斜視図であり、図
１と異なるのは容量９が半導体基板８の上に構成され、
概容量の接地電極を接地用ボンディングパッド１２を介
し、仮想地盤１に電気的に接地用ボンディングワイヤ１
３により接続し、非接地電極を非接地用ボンディングパ
ッド１０を介し、接地用ボンディングワイヤ１１により
接続スイッチ４に電気的に接続する点である。本実施例
によれば複数の容量を半導体プロセスを用いて形成する
ことができ、アクティブアンテナの小型化，量産効果に
よるコスト低減の効果がある。FIG. 7 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention, which is different from FIG. 1 in that the capacitor 9 is formed on the semiconductor substrate 8.
The grounding electrode of the approximate capacity is electrically grounded to the virtual ground 1 through the bonding pad 12 for grounding.
3 and the non-grounding electrode is electrically connected to the connection switch 4 through the non-grounding bonding pad 10 and the grounding bonding wire 11. According to this embodiment, a plurality of capacitors can be formed by using a semiconductor process, and there is an effect of downsizing the active antenna and cost reduction due to mass production effect.
【００１５】図８は本発明による自己インピーダンス可
変アクティブアンテナの他の実施例の斜視図であり、図
１と異なるのは容量９とスイッチ１４が半導体基板８の
上に構成され、概容量の接地電極を接地用ボンディング
パッド１２を介し、仮想地盤１に電気的に接地用ボンデ
ィングワイヤ１３により接続し、非接地電極と一端を半
導体基板上で結合されたスイッチを非接地用ボンディン
グパッド１０を介し、接地用ボンディングワイヤ１１に
より板状導体１に電気的に接続する点である。本実施例
によれば複数の容量とスイッチを半導体プロセスを用い
て形成することができ、アクティブアンテナの小型化，
量産効果によるコスト低減の効果がある。特に半導体プ
ロセスの特徴により、アクティブ素子であるスイッチを
極めて小さく実現できるので、半導体基板上のスイッチ
の大きさは容量と比べてほとんど半導体全体の中では問
題にならないため、複雑なスイッチ構成を小さな体積で
実現できる効果が大きい。FIG. 8 is a perspective view of another embodiment of the variable self-impedance active antenna according to the present invention, which is different from FIG. 1 in that the capacitor 9 and the switch 14 are formed on the semiconductor substrate 8 and the approximate capacitance is grounded. The electrode is electrically connected to the virtual ground 1 by the grounding bonding wire 13 through the grounding bonding pad 12, and the switch whose one end is coupled to the non-grounding electrode on the semiconductor substrate is connected through the non-grounding bonding pad 10. This is a point where the bonding wire 11 for grounding is electrically connected to the plate-shaped conductor 1. According to this embodiment, a plurality of capacitors and switches can be formed by using a semiconductor process, and the size of the active antenna can be reduced.
There is an effect of cost reduction due to mass production. In particular, due to the characteristics of the semiconductor process, it is possible to realize a switch that is an active element in an extremely small size. Therefore, the size of the switch on the semiconductor substrate is not a problem in almost the entire semiconductor compared to the capacitance. The effect that can be realized with is great.
【００１６】図９は本発明による自己インピーダンス可
変アクティブアンテナの他の実施例の斜視図であり、図
１と異なるのはスイッチ４のオン−オフを信号線１６に
よって計算機１７と結合した制御回路１５によって行う
点である。本実施例によればあらかじめ設定されたアル
ゴリズムに従って、アクティブアンテナの自己インピー
ダンスを変えることができるので、本アクティブアンテ
ナが採用される端末の使用環境に応じてアクティブアン
テナの自己インピーダンスを調整し、端末の高周波部か
ら供給される電磁エネルギの効率良い外部空間への放射
によって達成される、端末消費電力低減の効果がある。FIG. 9 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention, which is different from FIG. 1 in that the on / off state of the switch 4 is connected to the computer 17 by the signal line 16. This is the point to do. According to this embodiment, the self-impedance of the active antenna can be changed according to the preset algorithm. Therefore, the self-impedance of the active antenna is adjusted according to the usage environment of the terminal in which this active antenna is adopted, There is an effect of reducing the terminal power consumption, which is achieved by efficiently radiating the electromagnetic energy supplied from the high frequency section to the external space.
【００１７】図１０は本発明による自己インピーダンス
可変アクティブアンテナの他の実施例の斜視図であり、
図９と異なるのは給電点３に於いて板状導体で構成され
るアンテナから反射して本アクティブアンテナが適用さ
れている端末高周波部へ戻る電磁エネルギを検出器１８
により検出し、その値を信号に変換する信号変換機１９
に入力し、信号変換機の出力を計算機１７に伝達し、信
号値によってスイッチ４のオン−オフを行う点である。
本実施例によれば、本アクティブアンテナが採用される
端末の使用環境の変化に応じたアクティブアンテナと端
末高周波部とのインピーダンス整合のずれによる、端末
の高周波部から供給される電磁エネルギの空間放射効率
低下を抑制でき、端末の感度向上・消費電力低減の効果
がある。FIG. 10 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention,
9 is different from FIG. 9 in that a detector 18 detects electromagnetic energy that is reflected from an antenna composed of a plate-shaped conductor at a feeding point 3 and returns to a high frequency part of a terminal to which this active antenna is applied.
Signal converter 19 that detects the
Is input to the computer 17, the output of the signal converter is transmitted to the computer 17, and the switch 4 is turned on / off according to the signal value.
According to the present embodiment, the spatial radiation of the electromagnetic energy supplied from the high frequency part of the terminal due to the impedance matching shift between the active antenna and the high frequency part of the terminal according to the change of the usage environment of the terminal in which the present active antenna is adopted. It is possible to suppress a decrease in efficiency, and to improve the sensitivity of the terminal and reduce power consumption.
【００１８】図１１は本発明による自己インピーダンス
可変アクティブアンテナの他の実施例の斜視図であり、
図１０と異なるのは計算機１７に記憶装置２０が結合さ
れている点である。本実施例によれば、記憶部にあらか
じめ、本アクティブアンテナが採用される端末の使用環
境の変化に応じたアクティブアンテナと端末高周波部と
のインピーダンス整合のずれによる、アクティブアンテ
ナから端末の高周波部へと反射される電磁エネルギの量
と、これを低減すべくインピーダンス整合のずれを補正
するためのスイッチのオン−オフ状態を複数記憶させて
おき、現実に生じている本アクティブアンテナが採用さ
れる端末の使用環境の変化を、信号変換機１９からの信
号と記憶内容により計算機１７が予測し、その予測値に
従ってスイッチのオン−オフをすることにより、高速に
アクティブアンテナの自己インピーダンスを変化させる
ことができる。FIG. 11 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention.
The difference from FIG. 10 is that the storage device 20 is connected to the computer 17. According to the present embodiment, the active antenna is changed from the active antenna to the high-frequency part of the terminal due to the impedance matching shift between the active antenna and the high-frequency part of the terminal according to the change of the usage environment of the terminal in which the active antenna is adopted in advance in the storage part. And the amount of electromagnetic energy reflected and a plurality of on / off states of switches for compensating for the deviation of impedance matching to reduce the amount of electromagnetic energy are stored, and a terminal in which the present active antenna actually occurs is adopted. The computer 17 predicts a change in the usage environment of the device from the signal from the signal converter 19 and the stored contents, and by turning the switch on and off according to the predicted value, the self impedance of the active antenna can be changed at high speed. it can.
【００１９】このアクティブアンテナの自己インピーダ
ンス可変速度高速化は、特に、TDMA等の時間方向に情報
を多重化するディジタル通信方式を、本アクティブアン
テナを適用する端末が使用されるシステムが採用してい
る場合重要で、情報伝達の遅延防止，情報の再送確率低
減による通信効率向上の効果がある。In order to increase the self-impedance variable speed of the active antenna, a digital communication system for multiplexing information in the time direction such as TDMA is adopted by a system in which a terminal to which the active antenna is applied is used. This is important in the case, and has the effect of improving communication efficiency by preventing delay in information transmission and reducing the probability of information retransmission.
【００２０】図１２は本発明による自己インピーダンス
可変アクティブアンテナの他の実施例の斜視図であり、
図１１と異なるのは図８の場合と同様、半導体基板８上
に、容量９，スイッチ１４，制御回路２３，計算機２
２，記憶装置２１，信号変換機２４を形成し、接地用ボ
ンディングパッド８を介して仮想地盤５に接地用ボンデ
ィングワイヤ１３で接地、検出器１８の値を検出器用ボ
ンディングパッド２５に非接地用ボンディングワイヤ１
１が結合されている点である。本実施例によれば図８の
場合と同様、複数の容量，スイッチ，計算機，記憶装
置，制御回路，信号変換機を半導体プロセスを用いて形
成することができ、アクティブアンテナの小型化，量産
効果によるコスト低減の効果がある。特に半導体プロセ
スの特徴により、アクティブ素子を小型，高集積化する
効果が大きいので、複雑なスイッチ切り替えアルゴリズ
ムを含む高速自己インピーダンス切り替えを実現する場
合に効果が大きい。FIG. 12 is a perspective view of another embodiment of the self-impedance variable active antenna according to the present invention.
The difference from FIG. 11 is that, as in the case of FIG. 8, the capacitor 9, the switch 14, the control circuit 23, and the computer 2 are provided on the semiconductor substrate 8.
2. Forming the memory device 21 and the signal converter 24, grounding to the virtual ground 5 with the grounding bonding wire 13 through the grounding bonding pad 8, and bonding the value of the detector 18 to the detector bonding pad 25 for non-grounding. Wire 1
This is the point where 1 is connected. According to this embodiment, as in the case of FIG. 8, a plurality of capacitors, switches, calculators, storage devices, control circuits, and signal converters can be formed using a semiconductor process, and the active antenna can be miniaturized and mass-produced. Has the effect of cost reduction. In particular, because of the characteristics of the semiconductor process, the effect of miniaturizing and highly integrating the active element is great, so that the effect is great when realizing high-speed self-impedance switching including a complicated switch switching algorithm.
【００２１】[0021]
【発明の効果】本発明によれば、アクティブアンテナの
自己インピーダンスを可変にすることができるので、携
帯移動端末等の、端末使用者の姿勢，端末の持ち方等の
使用環境に依存してアクティブアンテナの入力インピー
ダンスが相当量変化し、端末内の高周波部とアンテナと
の整合状態が悪化し、通信に必要な電磁波エネルギの端
末からの効率よい放射が阻害されるために引き起こされ
る、通信感度劣化，端末消費電力の低下の問題を、アク
ティブアンテナと高周波部との整合を補償することによ
って解決する。According to the present invention, since the self-impedance of the active antenna can be made variable, the active antenna can be made active depending on the usage environment such as the attitude of the terminal user of the portable mobile terminal and the way of holding the terminal. Deterioration of communication sensitivity caused by a significant change in the input impedance of the antenna, deterioration of the matching condition between the high-frequency part in the terminal and the antenna, and interference with efficient radiation of the electromagnetic wave energy required for communication from the terminal. , The problem of lowering the power consumption of the terminal is solved by compensating the matching between the active antenna and the high frequency part.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例の自己インピーダンス可変ア
クティブアンテナの斜視図。FIG. 1 is a perspective view of a self-impedance variable active antenna according to an embodiment of the present invention.
【図２】本発明の第二の実施例の他の自己インピーダン
ス可変アクティブアンテナの斜視図。FIG. 2 is a perspective view of another self-impedance variable active antenna according to the second embodiment of the present invention.
【図３】本発明の第三の自己インピーダンス可変アクテ
ィブアンテナの斜視図。FIG. 3 is a perspective view of a third self-impedance variable active antenna according to the present invention.
【図４】本発明の第四の自己インピーダンス可変アクテ
ィブアンテナの斜視図。FIG. 4 is a perspective view of a fourth self-impedance variable active antenna according to the present invention.
【図５】本発明の第五の自己インピーダンス可変アクテ
ィブアンテナの斜視図。FIG. 5 is a perspective view of a fifth self-impedance variable active antenna according to the present invention.
【図６】本発明の第六の自己インピーダンス可変アクテ
ィブアンテナの斜視図。FIG. 6 is a perspective view of a sixth self-impedance variable active antenna according to the present invention.
【図７】本発明の第七の自己インピーダンス可変アクテ
ィブアンテナの斜視図。FIG. 7 is a perspective view of a seventh self-impedance variable active antenna according to the present invention.
【図８】本発明の第八の自己インピーダンス可変アクテ
ィブアンテナの斜視図。FIG. 8 is a perspective view of an eighth self-impedance variable active antenna according to the present invention.
【図９】本発明の第九の自己インピーダンス可変アクテ
ィブアンテナの斜視図。FIG. 9 is a perspective view of a ninth self-impedance variable active antenna according to the present invention.
【図１０】本発明の第十の自己インピーダンス可変アク
ティブアンテナの斜視図。FIG. 10 is a perspective view of a tenth self-impedance variable active antenna according to the present invention.
【図１１】本発明の第十一の自己インピーダンス可変ア
クティブアンテナの斜視図。FIG. 11 is a perspective view of an eleventh variable self-impedance active antenna according to the present invention.
【図１２】本発明の第十二の自己インピーダンス可変ア
クティブアンテナの斜視図。FIG. 12 is a perspective view of a twelfth self-impedance variable active antenna of the present invention.
１…板状導体、２…容量、３…給電点、４…スイッチ、
５…仮想地盤、６…励振源。1 ... Plate conductor, 2 ... Capacitance, 3 ... Feed point, 4 ... Switch,
5 ... Virtual ground, 6 ... Excitation source.
Claims (10)
た、線状或いは板状導体で構成されるアンテナにおい
て、前記仮想地盤を接地電位に持つ給電点と、仮想地盤
上に形成された一つ或いは複数の容量と、前記容量の非
接地電極と一端を結合されたスイッチの他の一端と結合
する一つの或いは複数の点を有する構造からなることを
特徴とする自己インピーダンス可変アクティブアンテ
ナ。1. An antenna composed of a linear or plate-shaped conductor formed on virtual ground such as a casing and a reflector, and a feed point having the virtual ground at a ground potential, and an antenna formed on the virtual ground. Self-impedance variable active, characterized in that it comprises a structure having one or a plurality of connected capacitors and one or a plurality of points connecting one end of the capacitor to the other end of the switch which is connected to the non-grounded electrode. antenna.
イッチが結合しており、前記容量と結合していない前記
スイッチの一端が、それぞれ前記アンテナの異なる点で
結合されている自己インピーダンス可変アクティブアン
テナ。2. The self-impedance variable according to claim 1, wherein one switch is coupled to one capacitor, and one end of the switch which is not coupled to the capacitor is coupled to different points of the antenna. Active antenna.
いずれか一つ或いは、任意の複数の組を選択する入出力
関係が一対多のスイッチマトリックスがスイッチとして
用いられ、複数の入力点の一つ一つに、前記容量の前記
非接地電極が結合され、一つの入力点が前記アンテナの
一点と結合する自己インピーダンス可変アクティブアン
テナ。3. The switch matrix according to claim 1, wherein a switch matrix having a one-to-many relationship between input and output for selecting any one of the plurality of capacitors or an arbitrary plurality of sets is used as a switch. A self-impedance variable active antenna in which the non-grounded electrodes of the capacitor are coupled to each other and one input point is coupled to one point of the antenna.
クスの構成が２枝分岐スイッチの階層構造による多段結
合をなす自己インピーダンス可変アクティブアンテナ。4. The self-impedance variable active antenna according to claim 3, wherein the switch matrix has a multi-stage coupling structure having a hierarchical structure of two-branch branch switches.
の比が２の冪乗値である自己インピーダンス可変アクテ
ィブアンテナ。5. The self-impedance variable active antenna according to claim 2, wherein the ratio of the plurality of capacitance values is a power of 2.
一つあるいは複数の容量が半導体基板の上に形成され、
前記基板の接地面が仮想地盤に電気的に結合され、非接
地面が電気的に前記スイッチに結合される、自己インピ
ーダンス可変アクティブアンテナ。6. The method according to claim 1, 2, 3, 4 or 5.
One or more capacitors are formed on the semiconductor substrate,
A self-impedance variable active antenna, wherein a ground plane of the substrate is electrically coupled to a virtual ground and a non-ground plane is electrically coupled to the switch.
一つあるいは複数の容量とスイッチが半導体基板の上に
形成され、前記スイッチの容量と結合していない点が前
記導体に電気的に結合され、前記基板の接地面が前記仮
想地盤に電気的に結合される自己インピーダンス可変ア
クティブアンテナ。7. The method according to claim 1, 2, 3, 4 or 5,
One or more capacitors and a switch are formed on the semiconductor substrate, a point not coupled to the capacitor of the switch is electrically coupled to the conductor, and a ground plane of the substrate is electrically coupled to the virtual ground. Self-impedance variable active antenna combined.
おいて、複数の容量を切り替える前記スイッチの各々に
制御回路が結合され、前記制御回路をこれにつながる信
号線を介して電気的に統制する計算機を具備する自己イ
ンピーダンス可変アクティブアンテナ。8. A control circuit according to claim 1, 2, 3, 4, 5, 6 or 7, wherein a control circuit is coupled to each of the switches for switching a plurality of capacitors, and the control circuit is connected via a signal line connected to the control circuit. A self-impedance variable active antenna equipped with an electronically controlled computer.
無線機高周波部から前記アンテナへ供給される電力にた
いして、前記アンテナから反射して戻ってくる電力を検
出する検出器を具備し、前記検出器で検出される電力を
信号に変換し、前記計算機に信号を伝達する信号伝送機
を具備する自己インピーダンス可変アクティブアンテ
ナ。9. The power feeding portion of the antenna according to claim 8,
A detector for detecting the electric power reflected and returned from the antenna with respect to the electric power supplied from the radio frequency unit to the antenna is provided, and the electric power detected by the detector is converted into a signal, which is stored in the computer. A self-impedance variable active antenna having a signal transmitter for transmitting a signal.
結合され、検出器から信号伝送機を介してもたらされる
信号を、前記記憶装置に予め記憶されている計算式に従
い計算し、前記記憶装置に予め記憶されたデータを比較
・参照した結果に基づき、各スイッチの開閉を決定し、
前記制御回路によってスイッチの結合を行う自己インピ
ーダンス可変アクティブアンテナ。10. The storage device according to claim 9, wherein a storage device is coupled to the computer, and a signal provided from the detector through the signal transmitter is calculated according to a calculation formula stored in advance in the storage device. Based on the result of comparing and referring to the data stored in advance, the opening and closing of each switch is determined,
A self-impedance variable active antenna in which switches are coupled by the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5012272A JPH06224618A (en) | 1993-01-28 | 1993-01-28 | Self-impedance variable active antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5012272A JPH06224618A (en) | 1993-01-28 | 1993-01-28 | Self-impedance variable active antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06224618A true JPH06224618A (en) | 1994-08-12 |
Family
ID=11800736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5012272A Pending JPH06224618A (en) | 1993-01-28 | 1993-01-28 | Self-impedance variable active antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06224618A (en) |
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| JP2004520746A (en) * | 2001-02-13 | 2004-07-08 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Device including wireless communication function |
| WO2006033199A1 (en) * | 2004-09-22 | 2006-03-30 | Matsushita Electric Industrial Co., Ltd. | Plane antenna |
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| JP2007504643A (en) * | 2003-09-02 | 2007-03-01 | コミツサリア タ レネルジー アトミーク | High impedance substrate |
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| KR20070114540A (en) * | 2006-05-29 | 2007-12-04 | 엘지전자 주식회사 | Antenna and mobile communication terminal including the same |
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| US7043269B2 (en) | 2001-02-26 | 2006-05-09 | Matsushita Electric Industrial Co., Ltd. | Communication card and communication device |
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| WO2007084094A3 (en) * | 2004-06-25 | 2007-09-20 | Intel Corp | Mems based tunable antenna for wireless reception and transmission |
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| WO2011055003A1 (en) * | 2009-11-03 | 2011-05-12 | Pulse Finland Oy | Adjustable antenna |
| JP2015084604A (en) * | 2009-11-13 | 2015-04-30 | 日立金属株式会社 | Circuit for frequency adjustment means and circuit board using the same |
| WO2012169186A1 (en) * | 2011-06-08 | 2012-12-13 | パナソニック株式会社 | Antenna device |
| EP3011640A1 (en) * | 2013-06-20 | 2016-04-27 | Sony Corporation | Antenna arrangement and device |
| CN104347928A (en) * | 2013-07-29 | 2015-02-11 | 联想(北京)有限公司 | Antenna device, electron equipment and method for controlling antenna device |
| CN104347928B (en) * | 2013-07-29 | 2018-07-06 | 联想(北京)有限公司 | Antenna assembly, electronic equipment and the method for controlling antenna assembly |
| CN104425872A (en) * | 2013-08-26 | 2015-03-18 | 联想(北京)有限公司 | Antenna and electronic equipment |
| JP2019029705A (en) * | 2017-07-25 | 2019-02-21 | 富士通コネクテッドテクノロジーズ株式会社 | Reception sensitivity control apparatus, reception sensitivity control method, and reception sensitivity control program |
| JP2021521761A (en) * | 2018-04-12 | 2021-08-26 | ニュースペラ メディカル インク | Midfield power supply for wireless implanted devices |
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