JP2005244585A - Isolator - Google Patents

Isolator Download PDF

Info

Publication number
JP2005244585A
JP2005244585A JP2004051481A JP2004051481A JP2005244585A JP 2005244585 A JP2005244585 A JP 2005244585A JP 2004051481 A JP2004051481 A JP 2004051481A JP 2004051481 A JP2004051481 A JP 2004051481A JP 2005244585 A JP2005244585 A JP 2005244585A
Authority
JP
Japan
Prior art keywords
conductor
center
conductors
central
ferrite member
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.)
Withdrawn
Application number
JP2004051481A
Other languages
Japanese (ja)
Inventor
Takashi Noguchi
剛史 野口
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Priority to JP2004051481A priority Critical patent/JP2005244585A/en
Publication of JP2005244585A publication Critical patent/JP2005244585A/en
Withdrawn legal-status Critical Current

Links

Images

Landscapes

  • Non-Reversible Transmitting Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an isolator sufficient in the transmission efficiency of a signal by uniformizing a characteristic impedance of an input side and that of an output side, thereby reducing an insertion loss. <P>SOLUTION: In the isolator, a crossing conductor part 5b of a first center conductor 5 is arranged in a position nearer to a ferrite member 4 rather than a crossing conductor part 6b of a second center conductor 6. On a ground part 7d-side of a third center conductor 7, an interval D1 between a first conductor 7b of the third center conductor 7 and a port part 5d of the first center conductor 5 is smaller than an interval D2 between a second conductor 7c of the third center conductor 7 and a port part 6d of the second center conductor 6. Thus, characteristics impedance of a port part 5d-side of the first center conductor 5 becomes small, and characteristics impedance of the port part 5d-(input side) of the first center conductor 5 and that of a port part 6d (output side) of the second center conductor 6 are made uniform. Insertion loss is reduced and the isolator of sufficient transmission efficiency of the signal is obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は携帯電話機等の移動体通信機の送信部等に適用されるアイソレータに関する。   The present invention relates to an isolator applied to a transmission unit of a mobile communication device such as a mobile phone.

従来のアイソレータの図面を説明すると、図６は従来のアイソレータの分解斜視図、図７は従来のアイソレータの要部の平面図、図８は従来のアイソレータに係る中心導体の展開図である。   FIG. 6 is an exploded perspective view of a conventional isolator, FIG. 7 is a plan view of a main part of the conventional isolator, and FIG. 8 is a developed view of a central conductor according to the conventional isolator.

次に、従来のアイソレータの構成を図６〜図８に基づいて説明すると、従来のアイソレータは、箱形の第１のヨーク５１と、この第１のヨーク５１内に配置された円板状の磁石５２と、この磁石５２の下部に配置された平板状のフェライト部材５３と、１２０度の間隔でフェライト部材５３に取り付けられ、一部が互いに交叉した状態となった金属板からなる三つの第１，第２，第３の中心導体５４、５５，５６と、フェライト部材５３を保持する箱形の樹脂ケース５７と、樹脂ケース５７の下部に配置されたコ字状の第２のヨーク５８を有する。   Next, the configuration of the conventional isolator will be described with reference to FIGS. 6 to 8. The conventional isolator includes a box-shaped first yoke 51 and a disk-shaped disk disposed in the first yoke 51. A magnet 52, a flat ferrite member 53 disposed below the magnet 52, and three third plates made of metal plates attached to the ferrite member 53 at intervals of 120 degrees and partially crossing each other. A box-shaped resin case 57 that holds the first, second, and third center conductors 54, 55, and 56, the ferrite member 53, and a U-shaped second yoke 58 disposed below the resin case 57. Have.

そして、フェライト部材５３は、２辺が互いに対向する長辺５３ａと、２辺が互いに対向する短辺５３ｂとを有した長方形状で構成されている。   And the ferrite member 53 is comprised by the rectangular shape which has the long side 53a in which two sides oppose each other, and the short side 53b in which two sides oppose each other.

また、第１，第２，第３の中心導体５４，５５，５６は、図８に示すように、金属板が打ち抜きされて形成され、中央に位置した四角形状のアース部７０から外方に延びて形成されている。   Further, as shown in FIG. 8, the first, second, and third center conductors 54, 55, and 56 are formed by punching a metal plate, and outward from the square ground portion 70 located at the center. It is formed to extend.

そして、第１，第２，第３の中心導体５４，５５，５６のそれぞれは、長手方向にスリット５４ａ、５５ａ、５６ａが設けられて２分割され、互いに平行で同じ幅を有した二条の導体５４ｂ、５５ｂ、５６ｂと、この導体５４ｂ、５５ｂ、５６ｂの一端部側に位置する第１，第２，第３のアース部５４ｃ、５５ｃ、５６ｃと、導体５４ｂ、５５ｂ、５６ｂの他端部側に位置する第１，第２，第３の第１，第２，第３のポート部５４ｄ、５５ｄ、５６ｄとを有する。   Each of the first, second, and third center conductors 54, 55, and 56 is provided with slits 54a, 55a, and 56a in the longitudinal direction, and is divided into two, which are parallel to each other and have the same width. 54b, 55b, 56b, the first, second, and third ground portions 54c, 55c, 56c located on one end side of the conductors 54b, 55b, 56b, and the other end side of the conductors 54b, 55b, 56b 1st, 2nd, 3rd 1st, 2nd, 3rd port part 54d, 55d, and 56d.

また、これ等の第１，第２，第３の中心導体５４，５５，５６は、先ず、アース部７０がフェライト部材５３の下面に配置され、この状態で、順次、第１，第２，第３の中心導体５４，５５，５６がフェライト部材５３の側面と上面に沿って折り曲げられて配置されている。   The first, second, and third center conductors 54, 55, and 56 are first arranged with the ground portion 70 on the lower surface of the ferrite member 53. In this state, the first, second, and third center conductors are sequentially arranged. The third central conductors 54, 55, 56 are arranged by being bent along the side surface and the upper surface of the ferrite member 53.

その結果、第１の中心導体５４の交叉する導体５４ｂは、第２の中心導体５５の交叉する導体５５ｂよりもフェライト部材５３に近い位置に、また、第２の中心導体５５の交叉する導体５５ｂは、第３の中心導体５６の交叉する導体５６ｂよりもフェライト部材５３に近い位置に配置される。   As a result, the intersecting conductor 54b of the first center conductor 54 is closer to the ferrite member 53 than the intersecting conductor 55b of the second center conductor 55, and the intersecting conductor 55b of the second center conductor 55 is. Is disposed at a position closer to the ferrite member 53 than the intersecting conductor 56 b of the third central conductor 56.

更に、第３の中心導体５６の第３のアース部５６ｃは、第１，第２の中心導体５４，５５の第１，第２のポート部５４ｄ、５５ｄ間に位置すると共に、第３の中心導体５６の第３のポート部５６ｄは、第１，第２の中心導体５４，５５の第１，第２のアース部５４ｃ、５５ｃ間に位置して配置されている。   Further, the third ground portion 56c of the third center conductor 56 is located between the first and second port portions 54d and 55d of the first and second center conductors 54 and 55, and the third center portion 56c. The third port portion 56d of the conductor 56 is disposed between the first and second ground portions 54c and 55c of the first and second center conductors 54 and 55.

そして、第３の中心導体５６の第３のポート部５６ｄから延びる二条の導体５６ｂは、９０度の角度で互いに平行に延び、図７に示すように第３のアース部５６ｃ側において、導体５６ｂと第１の中心導体５４のポート部５４ｄとの間隔Ｓ１と、導体５６ｂと第２の中心導体５５のポート部５５ｄとの間隔Ｓ２は同じ寸法となっている。   The two conductors 56b extending from the third port portion 56d of the third central conductor 56 extend in parallel with each other at an angle of 90 degrees, and the conductor 56b on the third grounding portion 56c side as shown in FIG. The distance S1 between the first central conductor 54 and the port portion 54d of the first center conductor 54 and the distance S2 between the conductor 56b and the port portion 55d of the second central conductor 55 have the same dimensions.

また、ここでは図示しないが、フェライト部材５３の上面に位置する第１，第２，第３の中心導体５４，５５，５６のそれぞれは、誘電体を介して絶縁された状態で上下方向に配置されている。   Although not shown here, each of the first, second, and third center conductors 54, 55, 56 located on the upper surface of the ferrite member 53 is arranged in the vertical direction in a state of being insulated via a dielectric. Has been.

また、樹脂ケース５７には、孔５７ａを有する底壁５７ｂが設けられると共に、この底壁５７ｂには、一部が底壁５７ｂ面と樹脂ケース５７の外部に露出した状態で、入出力端子５９、６０とアース端子６１が埋設されている。
そして、第１，第２，第３の中心導体５４，５５，５６を取り付けたフェライト部材５３は、孔５７内に配置されて、第１，第２，第３の中心導体５４，５５，５６の一端側であるアース部７０が第２のヨーク５８に接続されている。 The resin case 57 is provided with a bottom wall 57b having a hole 57a. The input / output terminal 59 is partially exposed to the bottom wall 57b and the outside of the resin case 57. , 60 and a ground terminal 61 are embedded.
The ferrite member 53 to which the first, second, and third center conductors 54, 55, and 56 are attached is disposed in the hole 57, and the first, second, and third center conductors 54, 55, and 56 are disposed. Is connected to the second yoke 58.

チップ型のコンデンサ６２，６３，６４とチップ型の抵抗器６５は、孔５７ａの周囲に配置され、コンデンサ６２，６３，６４の下面電極と抵抗器６５の一端側の電極６５ａは、それぞれアース端子６１に接続されている。
そして、第１、第２の中心導体５４、５５のポート部５４ｄ、５５ｄのそれぞれは、コンデンサ６２，６３の上面電極に半田付けされると共に、第３の中心導体５６のポート部５６ｄは、コンデンサ６４の上面電極と抵抗器６５の他端側の電極６５ｂの上面に半田付して接続されている。 The chip type capacitors 62, 63, 64 and the chip type resistor 65 are arranged around the hole 57a, and the lower surface electrode of the capacitors 62, 63, 64 and the electrode 65a on one end side of the resistor 65 are respectively ground terminals. 61 is connected.
The port portions 54d and 55d of the first and second center conductors 54 and 55 are soldered to the upper surface electrodes of the capacitors 62 and 63, and the port portion 56d of the third center conductor 56 is The upper surface electrode 64 and the upper surface of the electrode 65b on the other end side of the resistor 65 are connected by soldering.

そして、第１，第２のヨーク５１，５８で磁石５２，フェライト部材５３、及び樹脂ケース５７を挟持した状態で、第１，第２のヨーク５１，５８を結合して、第１，第２のヨーク５１，５８とで磁気閉回路が形成され、アイソレータが構成されている。（例えば、特許文献１参照）   Then, with the magnet 52, the ferrite member 53, and the resin case 57 sandwiched between the first and second yokes 51 and 58, the first and second yokes 51 and 58 are coupled to each other. The yokes 51 and 58 form a magnetic closed circuit to form an isolator. (For example, see Patent Document 1)

しかし、従来のアイソレータは、第１の中心導体５４の交叉する導体５４ｂが第２の中心導体の交叉する導体５５ｂよりもフェライト部材５３に近い位置に配置されると共に、第３の中心導体５６は、アース部５６ｃ側において、導体５６ｂと第１の中心導体５４のポート部５４ｄとの間隔Ｓ１と、導体５６ｂと第２の中心導体５５のポート部５５ｄとの間隔Ｓ２は同じ寸法となっているため、第１，第２の中心導体５４，５５における特性インピーダンスを一致させることができず、挿入損失が大きくなって、信号の伝達効率が悪くなる。   However, in the conventional isolator, the intersecting conductor 54b of the first center conductor 54 is disposed at a position closer to the ferrite member 53 than the intersecting conductor 55b of the second center conductor, and the third center conductor 56 is On the ground part 56c side, the distance S1 between the conductor 56b and the port part 54d of the first central conductor 54 and the distance S2 between the conductor 56b and the port part 55d of the second central conductor 55 have the same dimensions. For this reason, the characteristic impedances of the first and second center conductors 54 and 55 cannot be matched, the insertion loss increases, and the signal transmission efficiency deteriorates.

特開２００１−９４３１１号公報JP 2001-94311 A

従来のアイソレータは、第１の中心導体５４の交叉する導体５４ｂが第２の中心導体の交叉する導体５５ｂよりもフェライト部材５３に近い位置に配置されると共に、第３の中心導体５６は、アース部５６ｃ側において、導体５６ｂと第１の中心導体５４のポート部５４ｄとの間隔Ｓ１と、導体５６ｂと第２の中心導体５５のポート部５５ｄとの間隔Ｓ２は同じ寸法となっているため、第１，第２の中心導体５４，５５における特性インピーダンスを一致させることができず、挿入損失が大きくなって、信号の伝達効率が悪くなるという問題がある。   In the conventional isolator, the intersecting conductor 54b of the first center conductor 54 is disposed closer to the ferrite member 53 than the intersecting conductor 55b of the second center conductor, and the third center conductor 56 is connected to the ground. On the side of the portion 56c, the interval S1 between the conductor 56b and the port portion 54d of the first center conductor 54 and the interval S2 between the conductor 56b and the port portion 55d of the second center conductor 55 have the same dimensions. There is a problem that the characteristic impedances of the first and second center conductors 54 and 55 cannot be matched, the insertion loss increases, and the signal transmission efficiency deteriorates.

そこで、本発明は入力側と出力側の特性インピーダンスを均一にし、挿入損失を低減して、信号の伝達効率の良好なアイソレータを提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide an isolator having uniform signal impedance on the input side and output side, reducing insertion loss, and good signal transmission efficiency.

上記課題を解決するための第１の解決手段として、平板状のフェライト部材と、このフェライト部材上に位置し、誘電体を挟んで上下方向の異なる面に設けられて、上下方向に一部が交叉する第１，第２，第３の中心導体と、この中心導体上に配置された磁石と、この磁石を覆うように配置された第１のヨークと、前記フェライト部材の下面側に配置され、前記第１のヨークとで磁気閉回路を構成する第２のヨークとを備え、前記第１，第２の中心導体は、前記フェライト部材上に位置する導体部と、この導体部に一端側に位置するアース部と、前記導体部の他端側に位置する入出力端側であるポート部を有し、前記第３の中心導体は、前記フェライト部材上に位置する二条の第１，第２の導体と、この導体に一端側に位置するアース部と、前記導体の他端側に位置するポート部を有し、前記フェライト部材上には、順次、前記第１，第２，第３の中心導体が配置されて、前記第１の中心導体の交叉する前記導体部が前記第２の中心導体の交叉する前記導体部よりも前記フェライト部材に近い位置に、また、前記第２の中心導体の交叉する前記導体部が前記第３の中心導体の交叉する前記導体よりも前記フェライト部材に近い位置に配置されると共に、前記第１，第２の中心導体の前記ポート部間に位置する前記第３の中心導体の前記アース部側において、前記第１の導体が前記第１の中心導体の前記ポート部側に、また、前記第２の導体が前記第２の中心導体の前記ポート部側に配置され、前記第３の中心導体の前記アース部側の前記第１の導体と前記第１の中心導体の前記ポート部との間の間隔は、前記第３の中心導体の前記アース部側の前記第２の導体と前記第２の中心導体の前記ポート部との間の間隔よりも小さくした構成とした。   As a first means for solving the above problems, a flat ferrite member and a ferrite member positioned on the ferrite member, provided on different surfaces in the vertical direction across the dielectric, and partially in the vertical direction The first, second, and third center conductors that cross each other, a magnet that is disposed on the center conductor, a first yoke that is disposed so as to cover the magnet, and a lower surface side of the ferrite member. A second yoke that forms a magnetic closed circuit with the first yoke, and the first and second central conductors are a conductor portion located on the ferrite member, and one end side of the conductor portion. And a port portion on the input / output end side located on the other end side of the conductor portion, and the third central conductor is formed by two first and first strips located on the ferrite member. Two conductors and a grounding portion located on one end side of the conductors; A port portion located on the other end side of the conductor, and the first, second, and third center conductors are sequentially disposed on the ferrite member, and the first center conductors cross each other. The conductor portion is closer to the ferrite member than the conductor portion where the second center conductor intersects, and the conductor portion where the second center conductor intersects intersects the third center conductor. The first conductor is disposed at a position closer to the ferrite member than the conductor, and on the ground portion side of the third central conductor located between the port portions of the first and second central conductors. A conductor is disposed on the port portion side of the first central conductor, and the second conductor is disposed on the port portion side of the second central conductor, and on the ground portion side of the third central conductor. The por of the first conductor and the first central conductor Spacing between the parts was a structure in which smaller than the distance between the port portion of said third central conductor the grounding portion side of the second conductor and the second central conductor.

また、第２の解決手段として、前記第３の中心導体の前記ポート部は、前記第１，第２の中心導体の前記アース部間に位置し、前記第１，第２の導体は、前記第３の中心導体の前記ポート部から互いに異なる角度を持って形成されると共に、前記第１の導体は、前記ポート部から前記第２の導体よりも大きく傾けて形成され、前記第３の中心導体の前記アース部側の前記第１の導体と前記第１の中心導体の前記ポート部との間の間隔が前記第３の中心導体の前記アース部側の前記第２の導体と前記第２の中心導体の前記ポート部との間の間隔よりも小さい構成とした。   As a second solution, the port portion of the third central conductor is located between the ground portions of the first and second central conductors, and the first and second conductors are The third conductor is formed at different angles from the port portion of the third central conductor, and the first conductor is formed to be inclined more greatly than the second conductor from the port portion, and the third center The distance between the first conductor on the grounding portion side of the conductor and the port portion of the first central conductor is such that the second conductor on the grounding portion side of the third central conductor and the second conductor It was set as the structure smaller than the space | interval between the said center conductors and the said port parts.

また、第３の解決手段として、前記フェライト部材は多角形で形成され、前記第３の中心導体の前記第１，第２の導体が前記フェライト部材の互いに対向する２辺を横切る方向に延びて配置された構成とした。
また、第４の解決手段として、前記第１，第２の導体が同じ幅寸法で形成された構成とした。 As a third solution, the ferrite member is formed in a polygonal shape, and the first and second conductors of the third central conductor extend in a direction crossing two opposite sides of the ferrite member. Arranged configuration.
As a fourth solution, the first and second conductors are formed with the same width.

本発明のアイソレータは、平板状のフェライト部材と、このフェライト部材上に位置し、誘電体を挟んで上下方向の異なる面に設けられて、上下方向に一部が交叉する第１，第２，第３の中心導体と、この中心導体上に配置された磁石と、この磁石を覆うように配置された第１のヨークと、フェライト部材の下面側に配置され、第１のヨークとで磁気閉回路を構成する第２のヨークとを備え、第１，第２の中心導体は、フェライト部材上に位置する導体部と、この導体部に一端側に位置するアース部と、導体部の他端側に位置する入出力端側であるポート部を有し、第３の中心導体は、フェライト部材上に位置する二条の第１，第２の導体と、この導体に一端側に位置するアース部と、導体の他端側に位置するポート部を有し、フェライト部材上には、順次、第１，第２，第３の中心導体が配置されて、第１の中心導体の交叉する導体部が第２の中心導体の交叉する導体部よりもフェライト部材に近い位置に、また、第２の中心導体の交叉する導体部が第３の中心導体の交叉する導体よりもフェライト部材に近い位置に配置されると共に、第１，第２の中心導体のポート部間に位置する第３の中心導体のアース部側において、第１の導体が第１の中心導体のポート部側に、また、第２の導体が第２の中心導体のポート部側に配置され、第３の中心導体のアース部側の第１の導体と第１の中心導体のポート部との間の間隔は、第３の中心導体のアース部側の第２の導体と第２の中心導体のポート部との間の間隔よりも小さくした構成とした。
即ち、第１の中心導体の交叉する導体部が第２の中心導体の交叉する導体部よりもフェライト部材に近い位置に配置されると共に、第１，第２の中心導体のポート部間に位置する第３の中心導体のアース部側において、第１の導体が第１の中心導体のポート部側に、また、第２の導体が第２の中心導体のポート部側に配置され、第３の中心導体のアース部側の第１の導体と第１の中心導体のポート部との間の間隔は、第３の中心導体のアース部側の第２の導体と第２の中心導体のポート部との間の間隔よりも小さくしたため、第１の中心導体のポート部（入力側）の特性インピーダンスが小さくなって、第１の中心導体のポート部（入力側）と第２の中心導体のポート部（出力側）の特性インピーダンスを均一にでき、挿入損失を低減して、信号の伝達効率の良好なものが得られる。 The isolator according to the present invention includes a flat ferrite member, first, second and second portions located on the ferrite member, provided on different surfaces in the vertical direction across the dielectric, and partially intersecting in the vertical direction. A third central conductor, a magnet disposed on the central conductor, a first yoke disposed so as to cover the magnet, and a lower surface side of the ferrite member, and being magnetically closed by the first yoke. A second yoke constituting a circuit, wherein the first and second central conductors are a conductor part located on the ferrite member, a ground part located on one end side of the conductor part, and the other end of the conductor part And the third central conductor includes two first and second conductors located on the ferrite member, and a grounding part located on one end side of the conductor. And a port portion located on the other end side of the conductor, and a ferrite portion The first, second, and third center conductors are sequentially arranged on the top, and the conductor portion where the first center conductor intersects is closer to the ferrite member than the conductor portion where the second center conductor intersects In addition, the intersecting conductor portion of the second center conductor is disposed closer to the ferrite member than the intersecting conductor of the third center conductor, and between the port portions of the first and second center conductors. On the ground portion side of the third central conductor positioned, the first conductor is disposed on the port portion side of the first central conductor, and the second conductor is disposed on the port portion side of the second central conductor, The distance between the first conductor on the grounding portion side of the third central conductor and the port portion of the first central conductor is such that the second conductor and the second central conductor on the grounding portion side of the third central conductor are It was set as the structure made smaller than the space | interval between port parts.
That is, the intersecting conductor portion of the first center conductor is disposed closer to the ferrite member than the intersecting conductor portion of the second center conductor, and is positioned between the port portions of the first and second center conductors. A first conductor is disposed on the port portion side of the first center conductor, and a second conductor is disposed on the port portion side of the second center conductor on the ground portion side of the third center conductor. The distance between the first conductor on the ground portion side of the center conductor and the port portion of the first center conductor is the second conductor on the ground portion side of the third center conductor and the port of the second center conductor. Therefore, the characteristic impedance of the port portion (input side) of the first center conductor is reduced, and the port portion (input side) of the first center conductor and the second center conductor are reduced. The characteristic impedance of the port part (output side) can be made uniform, reducing the insertion loss, Good thing No. transmission efficiency is obtained.

また、第３の中心導体のポート部は、第１，第２の中心導体のアース部間に位置し、第１，第２の導体は、第３の中心導体のポート部から互いに異なる角度を持って形成されると共に、第１の導体は、ポート部から第２の導体よりも大きく傾けて形成され、第３の中心導体のアース部側の第１の導体と第１の中心導体のポート部との間の間隔が第３の中心導体のアース部側の第２の導体と第２の中心導体のポート部との間の間隔よりも小さい構成としたため、第３の中心導体の第１，第２の導体は、第２の導体よりも第１の導体を大きく傾けた状態で形成すれば良く、その構成が簡単で、生産性の良好なものが得られる。   The port portion of the third central conductor is located between the ground portions of the first and second central conductors, and the first and second conductors are at different angles from the port portion of the third central conductor. The first conductor is formed to be inclined more greatly than the second conductor from the port portion, and the first conductor on the ground portion side of the third center conductor and the port of the first center conductor Since the distance between the first central conductor and the second central conductor is smaller than the distance between the second conductor on the ground portion side of the third central conductor and the port part of the second central conductor, the first central conductor first , The second conductor may be formed in a state in which the first conductor is greatly inclined with respect to the second conductor, and the structure is simple and the productivity is high.

また、フェライト部材は多角形で形成され、第３の中心導体の第１，第２の導体がフェライト部材の互いに対向する２辺を横切る方向に延びて配置されたため、フェライト部材に対する第１，第２の導体の位置が安定して、性能の良好なものが得られる。   Further, the ferrite member is formed in a polygonal shape, and the first and second conductors of the third central conductor are arranged to extend in a direction crossing two opposite sides of the ferrite member, so that the first and first conductors with respect to the ferrite member are arranged. The position of the second conductor is stable, and a good performance can be obtained.

また、第１，第２の導体が同じ幅寸法で形成されたため、第１，第２の導体の形成が容易であると共に、第１，第２の導体の幅寸法が精度良く形成できて、性能の良好なものが得られる。   In addition, since the first and second conductors are formed with the same width dimension, the first and second conductors can be easily formed, and the width dimensions of the first and second conductors can be accurately formed. Good performance can be obtained.

本発明のアイソレータの図面を説明すると、図１は本発明のアイソレータの第１実施例に係る分解斜視図、図２は本発明のアイソレータの第１実施例に係る要部の平面図、図３は本発明のアイソレータの第１実施例に係る中心導体の展開図、図４は本発明のアイソレータの第２実施例に係る要部の拡大平面図、図５は本発明のアイソレータの等価回路図である。   FIG. 1 is an exploded perspective view according to a first embodiment of the isolator of the present invention, FIG. 2 is a plan view of a main part according to the first embodiment of the isolator of the present invention, and FIG. Fig. 4 is a development view of the central conductor according to the first embodiment of the isolator of the present invention, Fig. 4 is an enlarged plan view of the main part according to the second embodiment of the isolator of the present invention, and Fig. 5 is an equivalent circuit diagram of the isolator of the present invention. It is.

次に、本発明のアイソレータの第１実施例の構成を図１〜図３に基づいて説明すると、箱形の磁性板（鉄板等）からなる第１のヨーク１は、正方形の上板１ａと、この上板１ａの４辺から下方に折り曲げられた側板１ｂとを有する。
円板状の磁石２は、その上面が上板１ａの内面にに接触した状態で、第１のヨーク１に適宜手段によって取り付けられている。 Next, the configuration of the first embodiment of the isolator according to the present invention will be described with reference to FIGS. 1 to 3. The first yoke 1 made of a box-shaped magnetic plate (iron plate or the like) includes a square upper plate 1a and The side plate 1b is bent downward from the four sides of the upper plate 1a.
The disc-shaped magnet 2 is attached to the first yoke 1 by appropriate means with its upper surface in contact with the inner surface of the upper plate 1a.

コ字状の磁性板（鉄板等）からなる第２のヨーク３は、四角形の底板３ａと、この底板３ａの対向する辺から上方に折り曲げられた対向する一対の側板３ｂとを有する。
そして、この第２のヨーク３は、底板３ａが上板１ａと対向して配置された状態で、その一対の側板３ｂが第１のヨーク１の一対の側板１ｂと結合されて、磁気閉回路が形成される。 The second yoke 3 made of a U-shaped magnetic plate (iron plate or the like) has a rectangular bottom plate 3a and a pair of opposing side plates 3b bent upward from opposing sides of the bottom plate 3a.
The second yoke 3 has a pair of side plates 3b coupled to a pair of side plates 1b of the first yoke 1 in a state where the bottom plate 3a is disposed to face the upper plate 1a, thereby forming a magnetic closed circuit. Is formed.

ＹＩＧ（Ｙｔｔｒｉｕｍ ｉｒｏｎ ｇａｒｎｅｔ）等からなる平板状のフェライト部材４は、２辺が互いに対向する長辺４ａと、２辺が互いに対向する短辺４ｂとを有した長方形状で構成されている。   The flat ferrite member 4 made of YIG (Yttrium iron garnet) or the like is formed in a rectangular shape having a long side 4a with two sides facing each other and a short side 4b with two sides facing each other.

銅等の薄い導電板からなる第１、第２，第３の中心導体５、６，７は、図３に示すように、金属板が打ち抜きされて形成され、中央に位置した四角形状のアース部８から外方に延びて形成されている。   As shown in FIG. 3, the first, second, and third center conductors 5, 6, and 7 made of a thin conductive plate such as copper are formed by punching a metal plate and have a square ground located at the center. It is formed to extend outward from the portion 8.

そして、第１，第２の中心導体５，６のそれぞれは、長手方向にスリット５ａ、６ａが設けられて２分割され、互いに平行で同じ幅を有した二条の導体部５ｂ、６ｂと、この導体部５ｂ、６ｂの一端側に位置する第１，第２のアース部５ｃ、６ｃと、導体部５ｂ、６ｂの他端側に位置する入出力端側である第１，第２のポート部５ｄ、６ｄとを有する。   Each of the first and second center conductors 5 and 6 is provided with slits 5a and 6a in the longitudinal direction and divided into two, and the two conductor portions 5b and 6b are parallel to each other and have the same width. First and second ground portions 5c and 6c located on one end side of the conductor portions 5b and 6b, and first and second port portions on the input / output end side located on the other end side of the conductor portions 5b and 6b 5d and 6d.

また、第３の中心導体７は、長手方向に略Ｖ字状のスリット７ａを設けて２分割され、互いに非平行状態で同じ幅寸法の二条の第１，第２の導体７ｂ、７ｃと、この第１，第２の導体７ｂ、７ｃの一端側に位置する第３のアース部７ｄと、第１，第２の導体７ｂ、７ｃの他端側に位置する第３のポート部７ｅとを有する。   Further, the third central conductor 7 is divided into two by providing a substantially V-shaped slit 7a in the longitudinal direction, and two first and second conductors 7b, 7c having the same width in a non-parallel state, A third ground portion 7d located on one end side of the first and second conductors 7b and 7c, and a third port portion 7e located on the other end side of the first and second conductors 7b and 7c. Have.

そして、第１，第２の導体７ｂ、７ｃは、図２，図３に示すように、第３ポート部７ｅから互いに異なる角を持って形成されると共に、第１の導体７ｂは、第３のポート部７ｅから第２の導体７ｃよりも大きく傾けられた状態で形成されている。   The first and second conductors 7b and 7c are formed with different angles from the third port portion 7e as shown in FIGS. 2 and 3, and the first conductor 7b The port portion 7e is inclined more than the second conductor 7c.

また、これ等の第１，第２，第３の中心導体５，６，７は、先ず、アース部８がフェライト部材４の下面に配置され、この状態で、順次、第１，第２，第３の中心導体５，６，７がフェライト部材４の側面と上面に沿って折り曲げられて配置されて、第１，第２の導体７ｂ、７ｃは、フェライト部材４の互いに対向する長辺（２辺）４ａを横切る方向に延びて配置されている。   In addition, the first, second, and third center conductors 5, 6, and 7 are arranged such that the grounding portion 8 is first disposed on the lower surface of the ferrite member 4. In this state, the first, second, and second center conductors are sequentially arranged. The third central conductors 5, 6, and 7 are arranged to be bent along the side surface and the upper surface of the ferrite member 4, and the first and second conductors 7 b and 7 c are the long sides ( 2 sides) are arranged extending in a direction crossing 4a.

その結果、第１の中心導体５の交叉する導体部５ｂは、第２の中心導体６の交叉する導体部６ｂよりもフェライト部材５３に近い位置に、また、第２の中心導体６の交叉する導体部６ｂは、第３の中心導体７の交叉する導体７ｂ、７ｃよりもフェライト部材４に近い位置に配置される。   As a result, the intersecting conductor portion 5b of the first center conductor 5 is closer to the ferrite member 53 than the intersecting conductor portion 6b of the second center conductor 6 and the second center conductor 6 intersects. The conductor portion 6 b is disposed at a position closer to the ferrite member 4 than the conductors 7 b and 7 c intersecting with the third central conductor 7.

更に、第３の中心導体７の第３のアース部７ｄは、第１，第２の中心導体５，６の第１，第２のポート部５ｄ、６ｄ間に位置すると共に、第３の中心導体７の第３のポート部７ｅは、第１，第２の中心導体５、６の第１，第２のアース部５ｃ、６ｃ間に位置して配置されている。   Further, the third ground portion 7d of the third center conductor 7 is located between the first and second port portions 5d and 6d of the first and second center conductors 5 and 6, and the third center portion 7d. The third port portion 7 e of the conductor 7 is disposed between the first and second ground portions 5 c and 6 c of the first and second center conductors 5 and 6.

そして、第３の中心導体７の第３のアース部７ｄ側では、図２に示すように、第１の導体７ｂと第１の中心導体５の第１のポート部５ｄとの間隔Ｄ１が第２の導体７ｃと第２の中心導体６の第２のポート部６ｄとの間隔Ｄ２よりも小さくなっている。
これによって、フェライト部材４に近い位置にある第１の中心導体５の第１のポート部（入力側）５ｄの特性インピーダンスを小さくしている。 Then, on the third grounding portion 7d side of the third central conductor 7, as shown in FIG. 2, the distance D1 between the first conductor 7b and the first port portion 5d of the first central conductor 5 is the first The distance D2 between the second conductor 7c and the second port portion 6d of the second central conductor 6 is smaller.
As a result, the characteristic impedance of the first port portion (input side) 5d of the first central conductor 5 located near the ferrite member 4 is reduced.

なお、この実施例では、第２の中心導体６よりも第１の中心導体５をフェライト部材４に近くして、間隔Ｄ１＜間隔Ｄ２としたが、第１の中心導体５よりも第２の中心導体６をフェライト部材４に近くして、間隔Ｄ２＜間隔Ｄ１としたものでも良い。   In this embodiment, the first central conductor 5 is closer to the ferrite member 4 than the second central conductor 6 and the distance D1 <the distance D2 is set. However, the second central conductor 5 is more second than the first central conductor 5. The center conductor 6 may be close to the ferrite member 4 so that the distance D2 <the distance D1.

この時、第１，第２，第３の中心導体５，６，７は、誘電体（図示せず）を挟んで上下方向の異なる面に１２０度の間隔で設けられて、上下方向に一部が交叉して配置されている。   At this time, the first, second, and third central conductors 5, 6, and 7 are provided at intervals of 120 degrees on different surfaces in the vertical direction with a dielectric (not shown) interposed therebetween, and are arranged in the vertical direction. The parts are arranged crossing each other.

そして、第１，第２の中心導体５，６，７がフェライト部材４に取り付けられた際、第１，第２の中心導体５，６は、短辺４ｂ側に位置し、フェライト部材４の長面側を横切るように配置されると共に、第３の中心導体７は、長辺４ａ側に位置し、フェライト部材４の短面側を横切るように配置されている。   When the first and second center conductors 5, 6 and 7 are attached to the ferrite member 4, the first and second center conductors 5 and 6 are located on the short side 4b side, The third center conductor 7 is disposed on the long side 4 a side and is disposed so as to cross the short surface side of the ferrite member 4 while being disposed so as to cross the long surface side.

また、樹脂ケース９には、孔９ａを有する底壁９ｂが設けられると共に、この底壁９ｂには、一部が底壁９ｂ面と樹脂ケース９の外部に露出した状態で、入出力端子１０、１１とアース端子１２が埋設されている。
そして、第１，第２，第３の中心導体５，６，７を取り付けたフェライト部材４が孔９ａ内に配置された際、樹脂ケース９の下部に配置された第２のヨーク３の底壁３ｂには、第１，第２，第３の中心導体５，６，７の一端側であるアース部８が接続された状態となる。 Further, the resin case 9 is provided with a bottom wall 9b having a hole 9a. The input / output terminal 10 is partially exposed to the bottom wall 9b and the outside of the resin case 9 on the bottom wall 9b. 11 and the ground terminal 12 are embedded.
When the ferrite member 4 to which the first, second, and third center conductors 5, 6, and 7 are attached is disposed in the hole 9a, the bottom of the second yoke 3 that is disposed below the resin case 9 is disposed. The wall 3b is connected to the grounding portion 8 which is one end side of the first, second and third center conductors 5, 6 and 7.

チップ型の第１，第２，第３のコンデンサＣ１，Ｃ２，Ｃ３とチップ型の抵抗器Ｒは、孔９ａの周囲に配置され、第１，第２，第３のコンデンサＣ１，Ｃ２，Ｃ３の下面電極と抵抗器Ｒの一端側の電極１３ａは、それぞれアース端子１２に接続されている。
そして、第１、第２の中心導体５，６の第１，第２のポート部５ｄ、６ｄのそれぞれは、第１，第２のコンデンサＣ１，Ｃ２の上面電極に半田付けされると共に、第３の中心導体７の第３のポート部７ｅは、第３のコンデンサＣ３の上面電極と抵抗器Ｒの他端側の電極１３ｂの上面に半田付して接続されている。 The chip-type first, second, and third capacitors C1, C2, and C3 and the chip-type resistor R are disposed around the hole 9a, and the first, second, and third capacitors C1, C2, and C3. The lower surface electrode and the electrode 13a on one end side of the resistor R are connected to the ground terminal 12, respectively.
The first and second port portions 5d and 6d of the first and second center conductors 5 and 6 are soldered to the upper surface electrodes of the first and second capacitors C1 and C2, respectively. The third port portion 7e of the third central conductor 7 is soldered and connected to the upper surface electrode of the third capacitor C3 and the upper surface of the electrode 13b on the other end side of the resistor R.

そして、第１，第２のヨーク１，３で磁石２，フェライト部材４、及び樹脂ケース９を挟持した状態で、第１，第２のヨーク１，３を結合して、第１，第２のヨーク１，３とで磁気閉回路が形成され、本発明のアイソレータが構成されている。   The first and second yokes 1 and 3 are coupled with the first and second yokes 1 and 3 sandwiched between the magnet 2, the ferrite member 4, and the resin case 9. The yokes 1 and 3 form a magnetic closed circuit to constitute an isolator according to the present invention.

また、図５は、本発明のアイソレータの等価回路図を示し、第１，第２，第３の中心導体５，６，７の一端側は、アース部８によって第１，第２，第３のアース部５ｃ、６ｃ、７ｄが接地され、第１，第２の中心導体５，６の他端側には、接地された第１，第２のコンデンサＣ１，Ｃ２が接続され、入出力端子となる第１，第２のポート部５ｄ、６ｄが設けられると共に、第３の中心導体７の他端側には、接地された第３のコンデンサＣ３と抵抗器Ｒが接続された第３のポート部７ｅが設けられている。   FIG. 5 shows an equivalent circuit diagram of the isolator of the present invention. One end sides of the first, second and third center conductors 5, 6 and 7 are connected to the first, second and third by the grounding portion 8. Are connected to the other ends of the first and second center conductors 5 and 6, and grounded first and second capacitors C1 and C2 are connected to the input / output terminals. The first and second port portions 5d and 6d are provided, and a third capacitor C3 and a resistor R, which are grounded, are connected to the other end of the third central conductor 7. A port portion 7e is provided.

また、図４は本発明のアイソレータの第２実施例に係り、この第２実施例の構成を説明すると、長方形状のフェライト部材４の角部には、切り落とし部４ｃが設けられて八角形状となし、第１，第２の中心導体５，６は、切り落とし部４ｃに位置した状態で、斜向かいの切り落とし部４ｃ間を横切るように配置されると共に、第３の中心導体は７は、長辺４ａ側に位置して、短面側を横切るように配置されたものである。   FIG. 4 relates to a second embodiment of the isolator according to the present invention. The configuration of the second embodiment will be described below. The corner portion of the rectangular ferrite member 4 is provided with a cut-off portion 4c to form an octagonal shape. None, the first and second center conductors 5 and 6 are arranged so as to cross between the diagonally cut-off portions 4c in a state of being located in the cut-off portion 4c, and the third center conductor 7 is a long It is located on the side 4a side and arranged so as to cross the short surface side.

そして、第１，第２の中心導体５，６の導体部５ｂ、６ｂは、屈曲した形状をなすと共に、その端部に設けられた第１，第２のポート部５ｄ、６ｄは、一方の長辺４ａ側に配置され、また、第３の中心導体７の第１，第２の導体７ｂ、７ｃは、第１の導体７ｂと第１の中心導体５の第１のポート部５ｄとの間隔Ｄ１が第２の導体７ｃと第２の中心導体６の第２のポート部６ｄとの間隔Ｄ２よりも小さくなっている。   The conductor portions 5b and 6b of the first and second center conductors 5 and 6 have a bent shape, and the first and second port portions 5d and 6d provided at the ends thereof are The first and second conductors 7b and 7c of the third center conductor 7 are arranged on the long side 4a side, and the first conductor 7b and the first port portion 5d of the first center conductor 5 are connected to each other. The distance D1 is smaller than the distance D2 between the second conductor 7c and the second port portion 6d of the second center conductor 6.

その他の構成は、上記第１実施例と同様であるので、同一部品に同一番号を付し、ここではその説明を省略する。   Since other configurations are the same as those of the first embodiment, the same parts are denoted by the same reference numerals, and the description thereof is omitted here.

本発明のアイソレータの第１実施例に係る分解斜視図。The disassembled perspective view which concerns on 1st Example of the isolator of this invention. 本発明のアイソレータの第１実施例に係る要部の平面図。The top view of the principal part which concerns on 1st Example of the isolator of this invention. 本発明のアイソレータの第１実施例に係る中心導体の展開図。The expanded view of the center conductor which concerns on 1st Example of the isolator of this invention. 本発明のアイソレータの第２実施例に係る要部の拡大平面図。The enlarged plan view of the principal part which concerns on 2nd Example of the isolator of this invention. 本発明のアイソレータの等価回路図。The equivalent circuit diagram of the isolator of this invention. 従来のアイソレータの分解斜視図。The disassembled perspective view of the conventional isolator. 従来のアイソレータの要部の平面図。The top view of the principal part of the conventional isolator. 従来のアイソレータに係る中心導体の展開図。The development of the center conductor concerning the conventional isolator.

符号の説明Explanation of symbols

１：第１のヨーク
１ａ：上板
１ｂ：側板
２：磁石
３：第２のヨーク
３ａ：底板
３ｂ：側板
４：フェライト部材
４ａ：長辺
４ｂ：短辺
４ｃ：切り落とし部
５：第１の中心導体
５ａ：スリット
５ｂ：導体部
５ｃ：第１のアース部
５ｄ：第１のポート部
６：第２の中心導体
６ａ：スリット
６ｂ：導体部
６ｃ：第２のアース部
６ｄ：第２のポート部
７：第３の中心導体
７ａ：スリット
７ｂ：第１の導体
７ｃ：第２の導体
７ｄ：第３のアース部
７ｅ：第３のポート部
Ｄ１：間隔
Ｄ２：間隔
８：アース部
９：樹脂ケース
９ａ：孔
９ｂ：底壁
１０：入出力端子
１１：入出力端子
１２：アース端子
Ｃ１：第１のコンデンサ
Ｃ２：第２のコンデンサ
Ｃ３：第３のコンデンサ
Ｒ：抵抗器
１３ａ：電極
１３ｂ：電極
1: First yoke 1a: Top plate 1b: Side plate 2: Magnet 3: Second yoke 3a: Bottom plate 3b: Side plate 4: Ferrite member 4a: Long side 4b: Short side 4c: Cut-off portion 5: First center Conductor 5a: Slit 5b: Conductor portion 5c: First ground portion 5d: First port portion 6: Second center conductor 6a: Slit 6b: Conductor portion 6c: Second ground portion 6d: Second port portion 7: Third central conductor 7a: Slit 7b: First conductor 7c: Second conductor 7d: Third earth portion 7e: Third port portion D1: Interval D2: Interval 8: Ground portion 9: Resin case 9a: hole 9b: bottom wall 10: input / output terminal 11: input / output terminal 12: ground terminal C1: first capacitor C2: second capacitor C3: third capacitor R: resistor 13a: electrode 13b: electrode

Claims (4)

平板状のフェライト部材と、このフェライト部材上に位置し、誘電体を挟んで上下方向の異なる面に設けられて、上下方向に一部が交叉する第１，第２，第３の中心導体と、この中心導体上に配置された磁石と、この磁石を覆うように配置された第１のヨークと、前記フェライト部材の下面側に配置され、前記第１のヨークとで磁気閉回路を構成する第２のヨークとを備え、前記第１，第２の中心導体は、前記フェライト部材上に位置する導体部と、この導体部に一端側に位置するアース部と、前記導体部の他端側に位置する入出力端側であるポート部を有し、前記第３の中心導体は、前記フェライト部材上に位置する二条の第１，第２の導体と、この導体に一端側に位置するアース部と、前記導体の他端側に位置するポート部を有し、前記フェライト部材上には、順次、前記第１，第２，第３の中心導体が配置されて、前記第１の中心導体の交叉する前記導体部が前記第２の中心導体の交叉する前記導体部よりも前記フェライト部材に近い位置に、また、前記第２の中心導体の交叉する前記導体部が前記第３の中心導体の交叉する前記導体よりも前記フェライト部材に近い位置に配置されると共に、前記第１，第２の中心導体の前記ポート部間に位置する前記第３の中心導体の前記アース部側において、前記第１の導体が前記第１の中心導体の前記ポート部側に、また、前記第２の導体が前記第２の中心導体の前記ポート部側に配置され、前記第３の中心導体の前記アース部側の前記第１の導体と前記第１の中心導体の前記ポート部との間の間隔は、前記第３の中心導体の前記アース部側の前記第２の導体と前記第２の中心導体の前記ポート部との間の間隔よりも小さくしたことを特徴とするアイソレータ。 A flat ferrite member and first, second, and third central conductors that are located on the ferrite member and are provided on different surfaces in the vertical direction across the dielectric, and partially intersect in the vertical direction; The magnet disposed on the central conductor, the first yoke disposed so as to cover the magnet, and the lower surface side of the ferrite member constitute the magnetic closed circuit. A second yoke, wherein the first and second central conductors are a conductor part located on the ferrite member, a ground part located on one end side of the conductor part, and the other end side of the conductor part And the third central conductor includes two first and second conductors located on the ferrite member and a ground located on one end of the conductor. Part and a port part located on the other end side of the conductor, The first, second, and third center conductors are sequentially disposed on the ferrite member, and the conductor portion that intersects with the first center conductor intersects with the second center conductor. The conductor portion intersecting the second center conductor is disposed closer to the ferrite member than the conductor intersecting the third center conductor, In the ground portion side of the third central conductor located between the port portions of the first and second central conductors, the first conductor is on the port portion side of the first central conductor, and The second conductor is disposed on the port portion side of the second center conductor, and the first conductor on the ground portion side of the third center conductor and the port portion of the first center conductor. The distance between the first central conductor and the third central conductor is Isolator, characterized in that it has less than the distance between the second conductor of the scan side and said port portion of said second central conductor. 前記第３の中心導体の前記ポート部は、前記第１，第２の中心導体の前記アース部間に位置し、前記第１，第２の導体は、前記第３の中心導体の前記ポート部から互いに異なる角度を持って形成されると共に、前記第１の導体は、前記ポート部から前記第２の導体よりも大きく傾けて形成され、前記第３の中心導体の前記アース部側の前記第１の導体と前記第１の中心導体の前記ポート部との間の間隔が前記第３の中心導体の前記アース部側の前記第２の導体と前記第２の中心導体の前記ポート部との間の間隔よりも小さいことを特徴とする請求項１記載のアイソレータ。 The port portion of the third center conductor is located between the ground portions of the first and second center conductors, and the first and second conductors are the port portions of the third center conductor. The first conductor is formed to be inclined more greatly than the second conductor from the port portion, and the first conductor on the ground portion side of the third central conductor is formed. The distance between the first conductor and the port portion of the first central conductor is a gap between the second conductor on the ground portion side of the third central conductor and the port portion of the second central conductor. The isolator according to claim 1, wherein the isolator is smaller than the interval therebetween. 前記フェライト部材は多角形で形成され、前記第３の中心導体の前記第１，第２の導体が前記フェライト部材の互いに対向する２辺を横切る方向に延びて配置されたことを特徴とする請求項１、又は２記載のアイソレータ。 The ferrite member is formed in a polygonal shape, and the first and second conductors of the third central conductor extend in a direction crossing two opposite sides of the ferrite member. Item 3. The isolator according to item 1 or 2. 前記第１，第２の導体が同じ幅寸法で形成されたことを特徴とする請求項１から３の何れかに記載のアイソレータ。
The isolator according to any one of claims 1 to 3, wherein the first and second conductors are formed with the same width.
JP2004051481A 2004-02-26 2004-02-26 Isolator Withdrawn JP2005244585A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004051481A JP2005244585A (en) 2004-02-26 2004-02-26 Isolator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004051481A JP2005244585A (en) 2004-02-26 2004-02-26 Isolator

Publications (1)

Publication Number Publication Date
JP2005244585A true JP2005244585A (en) 2005-09-08

Family

ID=35025835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004051481A Withdrawn JP2005244585A (en) 2004-02-26 2004-02-26 Isolator

Country Status (1)

Country Link
JP (1) JP2005244585A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103650467A (en) * 2011-07-08 2014-03-19 株式会社Ntt都科摩 Mobile communication method and call session control server apparatus
US8942283B2 (en) 2005-03-31 2015-01-27 Euclid Discoveries, Llc Feature-based hybrid video codec comparing compression efficiency of encodings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8942283B2 (en) 2005-03-31 2015-01-27 Euclid Discoveries, Llc Feature-based hybrid video codec comparing compression efficiency of encodings
CN103650467A (en) * 2011-07-08 2014-03-19 株式会社Ntt都科摩 Mobile communication method and call session control server apparatus

Similar Documents

Publication Publication Date Title
JP3646532B2 (en) Non-reciprocal circuit element
JP2005244585A (en) Isolator
JP2004253930A (en) Isolator
JP2005236366A (en) Nonreciprocal circuit element
JP2004343273A (en) Nonreciprocal circuit element
US6670862B2 (en) Nonreciprocal circuit device and communication apparatus
JP2003133812A (en) Irreversible circuit element and isolator
JP3663396B2 (en) Non-reciprocal circuit element
JP3092228U (en) Non-reciprocal circuit device
JP4063816B2 (en) Non-reciprocal circuit element
JP3092227U (en) Non-reciprocal circuit device
JP3660316B2 (en) Non-reciprocal circuit element
JP3673512B2 (en) Non-reciprocal circuit element
JP2005223729A (en) Nonreciprocal circuit element and manufacturing method thereof
JP2007129314A (en) Non-reciprocating circuit element
JP2006197246A (en) Capacity adjustment method for capacitor in non-reciprocative circuit element
JP2006148218A (en) Non-reciprocal circuit element
JP2006303596A (en) Nonreciprocal circuit element
JP2005204164A (en) Non-reciprocal circuit element
JP2004222144A (en) Non-reciprocal circuit element
JP2005260498A (en) Non-reciprocal circuit element
JP2005244586A (en) Non-reciprocal circuit element
JP2004247920A (en) Irreversible circuit element
JP2006033690A (en) Irreversible circuit element
JP2006148217A (en) Non-reciprocal circuit element

Legal Events

Date Code Title Description
A621 Written request for application examination

Effective date: 20060901

Free format text: JAPANESE INTERMEDIATE CODE: A621

A761 Written withdrawal of application

Free format text: JAPANESE INTERMEDIATE CODE: A761

Effective date: 20070115