JPH0374901A - Irreversible circuit element - Google Patents

Irreversible circuit element

Info

Publication number
JPH0374901A
JPH0374901A JP21102089A JP21102089A JPH0374901A JP H0374901 A JPH0374901 A JP H0374901A JP 21102089 A JP21102089 A JP 21102089A JP 21102089 A JP21102089 A JP 21102089A JP H0374901 A JPH0374901 A JP H0374901A
Authority
JP
Japan
Prior art keywords
dielectric substrate
board
lead
flat plate
ferrite
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.)
Pending
Application number
JP21102089A
Other languages
Japanese (ja)
Inventor
Masanori Tsuji
政則 辻
Masayuki Yoneda
米田 正幸
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing 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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP21102089A priority Critical patent/JPH0374901A/en
Publication of JPH0374901A publication Critical patent/JPH0374901A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/18Printed circuits structurally associated with non-printed electric components

Landscapes

  • Non-Reversible Transmitting Devices (AREA)

Abstract

PURPOSE:To reduce the mount space and to make the element small by forming a dielectric board to be a flat plate and leading out each impedance matching electrode on the board to one side ridge of the dielectric board. CONSTITUTION:With a circulator 1 mounted on a printed circuit board, an input output terminal 15 is soldered to a pattern of the printed circuit board while a case main body 2 is stood upright and a fixed piece 14 of the case main body 2 is inserted and fixed thereto. Moreover, the dielectric board 6 is formed to be a flat plate to expand the surface area of the board 6 and 1st and 2nd capacitor electrodes 12a, 12b are easily led to one side ridge 6a with a leadout line 13 without making the board large. Thus, the input output terminal 15 is led out in the same direction from the case main body 2 and the mount space is reduced to nearly a half.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、VHF、Ul(F及びマイクロ波帯の高周波
部品に採用される非可逆回路素子、例えば集中定数型の
サーキュレータに関し、特にプリント基板への実装スペ
ースを縮小できるようにした構造に関する。
Detailed Description of the Invention [Field of Industrial Application] The present invention relates to non-reciprocal circuit elements, such as lumped constant circulators, used in high frequency components in VHF, Ul(F and microwave bands), and in particular to printed circuit boards. Concerning a structure that allows for a reduction in the installation space.

〔従来の技術〕[Conventional technology]

従来、マイクロ波機器等に採用される集中定数型のサー
キュレータとして、第8図に示す構造のものがある。こ
のサーキュレータ30は、底板31aと蓋部31bとか
らなる磁性体製金属ケース31内にアース板32を介し
て誘電体基板33を配設し、該基板33の中央孔33a
内に、中心導体37とフェライト342との組立て体3
4を挿入配置するとともに、上記ケース31の蓋部31
b内に永久磁石35を接着して上記フェライト組立て体
34に直流磁界を印加するよう構成されている。また、
上記誘電体基板33の上面には容量値となる3つのコン
デンサ電極36が形成されており、この各コンデンサ電
極36は入出力端子40によってケース31の開口から
外方に導出されている。上記サーキュレータ30をプリ
ント基板上に実装する場合は、該基板にケース31の底
板31aを伏せた状態で載置し、各端子40を回路配線
に半田付けする。
2. Description of the Related Art Conventionally, there is a lumped constant type circulator employed in microwave equipment and the like having a structure shown in FIG. This circulator 30 has a dielectric substrate 33 disposed through a ground plate 32 in a magnetic metal case 31 consisting of a bottom plate 31a and a lid part 31b, and a center hole 33a of the substrate 33.
Inside, the assembly 3 of the center conductor 37 and ferrite 342
4 is inserted and arranged, and the lid part 31 of the case 31 is inserted.
A permanent magnet 35 is bonded inside the ferrite assembly 34 to apply a DC magnetic field to the ferrite assembly 34. Also,
Three capacitor electrodes 36 having a capacitance value are formed on the upper surface of the dielectric substrate 33, and each capacitor electrode 36 is led out from the opening of the case 31 by an input/output terminal 40. When the circulator 30 is mounted on a printed circuit board, the bottom plate 31a of the case 31 is placed face down on the printed circuit board, and each terminal 40 is soldered to the circuit wiring.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

ところで、近年の電子機器においては小型化が要請され
ており、この要請に応えるためには電子部品の実装スペ
ースをできる限り縮小するのが有効である。しかしなが
ら、上記従来のサーキュレータ30は、第8図(′b)
及び第9図に示すように、ケース31を伏せた状態で実
装し、かつ各端子40がケース31の各側面からそれぞ
れ異なる方向に突出した構造であるから、この各入出力
端子40の突出骨だけ実装面積が拡大し、上述の小型化
に貢献できないという問題点がある。
Incidentally, there has been a demand for miniaturization of electronic devices in recent years, and in order to meet this demand, it is effective to reduce the mounting space for electronic components as much as possible. However, the conventional circulator 30 shown in FIG. 8('b)
As shown in FIG. 9, since the case 31 is mounted face down and each terminal 40 is structured to protrude from each side of the case 31 in different directions, the protruding bones of each input/output terminal 40 are However, there is a problem in that the mounting area is increased and it is not possible to contribute to the above-mentioned miniaturization.

ここで、実装スペースを縮小するために、上記各コンデ
ンサ電極を導出ラインを介して誘電体基板の一側縁に導
出し、各端子をケースの一側面から同一方向に突出させ
ることが考えられる。このようにした場合は、ケースを
立てた状態で実装できるとともに、端子の突出による接
続面積をなくすことができる。しかし、上記従来のサー
キュレータ30は、誘電体基板33に中央孔33aを形
成し、これに上記フェライト34aを挿入する構造であ
り、誘電体基板33上に上記導出ラインを付加すること
ができない、なお、上記導出ラインを付加できる程度に
誘電体基板の面積を大きくすることも考えられるが、こ
れでは部品が大型化し、上述の要請に応えることはでき
ない。
Here, in order to reduce the mounting space, it is conceivable to lead out each of the capacitor electrodes to one side edge of the dielectric substrate via a lead-out line, and make each terminal protrude from one side of the case in the same direction. In this case, the case can be mounted in an upright state, and the connection area due to protruding terminals can be eliminated. However, the conventional circulator 30 has a structure in which a center hole 33a is formed in the dielectric substrate 33 and the ferrite 34a is inserted into the center hole 33a, and the lead-out line cannot be added on the dielectric substrate 33. Although it is conceivable to increase the area of the dielectric substrate to the extent that the above-mentioned lead-out line can be added, this would increase the size of the components and would not be able to meet the above-mentioned requirements.

本発明は上記従来の問題点を解決するためになされたも
ので、誘電体基板の大きさを変えることなく導出ライン
を付加でき、ひいてはプリント基板への実装スペースを
縮小できる非可逆回路素子を提供することを目的として
いる。
The present invention has been made in order to solve the above-mentioned conventional problems, and provides a non-reciprocal circuit element that can add lead-out lines without changing the size of a dielectric substrate, and can further reduce the mounting space on a printed circuit board. It is intended to.

C問題点を解決するための手段〕 本発明は、複数の中心導体とフェライトとの組立て体と
、該基中心導体に接続されるインピーダンス整合電極が
形成された誘電体基板とをケース内に収容してなる非可
逆回路素子において、上記誘電体基板を平板状に形成す
るとともに上記組立体の一主面側に配置し、該基板の主
面に上記インピーダンス整合!極を形成し、該各整合電
極を導出ラインにより上記誘電体基板の一側縁に導出し
たことを特徴としている。
Means for Solving Problem C] The present invention houses in a case an assembly of a plurality of center conductors and ferrite, and a dielectric substrate on which an impedance matching electrode connected to the base center conductor is formed. In the non-reciprocal circuit element, the dielectric substrate is formed into a flat plate shape and placed on one main surface side of the assembly, and the impedance is matched to the main surface of the substrate! The device is characterized in that a pole is formed, and each of the matching electrodes is led out to one side edge of the dielectric substrate by a lead-out line.

ここで上記導出ラインの導出端には、入出力端子を接続
し、又は入出力電極を形成することとなる。
Here, an input/output terminal is connected to the lead-out end of the lead-out line, or an input/output electrode is formed.

〔作用〕[Effect]

本発明に係る非可逆回路素子によれば、誘電体基板を平
板状に形成したので、従来のように基板に中央孔を形成
する構造に比べて表面積を拡大でき、上記誘電体基板の
各インピーダンス整合電極に導出ラインを付加してit
基板の一側縁に導出することができる。この導出端に入
出力端子又は入出力電極を接続することにより、入出力
端子等を同一方向に導出することができるから、ケース
を立てた状態で実装する立型を実現できる。従って入出
力端子を接続した場合も実装面積が拡大することがなく
、その結果プリント基板への実装スペースを縮小でき、
上述の電子機器の小型化に貢献できる。
According to the non-reciprocal circuit element of the present invention, since the dielectric substrate is formed into a flat plate, the surface area can be expanded compared to the conventional structure in which a central hole is formed in the substrate, and each impedance of the dielectric substrate can be increased. Add a lead line to the matching electrode
It can be led out to one side edge of the substrate. By connecting input/output terminals or input/output electrodes to this lead-out end, the input/output terminals, etc. can be led out in the same direction, so it is possible to realize a vertical type in which the case is mounted in an upright state. Therefore, even when input/output terminals are connected, the mounting area does not increase, and as a result, the mounting space on the printed circuit board can be reduced.
It can contribute to miniaturization of the above-mentioned electronic devices.

〔実施例〕〔Example〕

以下、本発明の実施例を図について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

第1図ないし第4図は本発明の一実施例による集中定数
型のサーキユレータである。このサーキユレータ1は、
開口を有する磁性体製の金属ケース本体2の底壁2a上
に永久磁石3を接着し、該永久磁石3の上部に板金型の
アース板4を配置し、該アース板4の中央孔4a内にフ
ェライト組立て体5を挿入するとともに、該組立て体5
の上部に19’を体基板6.及び端子ブロンクツを配設
し、さらに上記ケース本体2の上部に蓋部8を装着して
構成されている。
1 to 4 show a lumped constant type circulator according to an embodiment of the present invention. This circulator 1 is
A permanent magnet 3 is glued onto the bottom wall 2a of a metal case body 2 made of a magnetic material having an opening, and a plate-shaped grounding plate 4 is placed on top of the permanent magnet 3. Insert the ferrite assembly 5 into the
19' on the top of the body substrate 6. and terminal brackets are disposed therein, and a lid part 8 is attached to the upper part of the case body 2.

上記フェライト組立て体5は、銅板からなる中心導体9
のシールド部9a上に円板状の下部フェライト10aを
載置し、該フェライト34aの上面に上記3本の中心導
体9をそれぞれ図示しない絶縁シートを介して120度
ごとに交叉させて折り曲げ配置し、これの上面に上部フ
ェライト10bを載置するとともに、上記各中心導体9
の外部導出部9bをケース本体2の開口側に屈曲させて
構成されている。なお、上記フェライト組立て体5は、
下部フェライト34aあるいは上部フェライ)10bの
いずれか1枚だけで構成される場合もある。
The ferrite assembly 5 has a central conductor 9 made of a copper plate.
A disk-shaped lower ferrite 10a is placed on the shield portion 9a of the ferrite 34a, and the three central conductors 9 are bent and placed on the upper surface of the ferrite 34a so as to intersect each other at 120 degrees with an insulating sheet (not shown) interposed therebetween. , an upper ferrite 10b is placed on the upper surface of this, and each of the above-mentioned center conductors 9
The external lead-out portion 9b is bent toward the opening side of the case body 2. Note that the ferrite assembly 5 is
In some cases, it is composed of only one of the lower ferrite 34a and the upper ferrite 10b.

また、上記端子ブロック7は、上記蓋部8の内周縁に沿
う矩形枠状に形成された合成樹脂からなる保持部材7の
一例部に、3本の入出力端子15の一端部15aを固定
して構成されており、該−端部15aは保持部材7aの
下面に露出している。
Further, the terminal block 7 has one end portion 15a of the three input/output terminals 15 fixed to an example part of the holding member 7 made of synthetic resin and formed into a rectangular frame shape along the inner peripheral edge of the lid portion 8. The lower end 15a is exposed on the lower surface of the holding member 7a.

さらに、上記誘電体基板6は矩形平板状に形成されてお
り、これの下面全面にはアース電極11が形成されてお
り、該アース電極11は上部フェライ)lObに当接し
ている。また、上記誘電体基板6の上面には、これの実
装時上部となる部分の左、右にそれぞれ第1.第2コン
デンサ電極12a、12bが、下部の中央に第3コンデ
ンサ電極12Cが形成されている。この各コンデンサ電
極122〜12Cには上記各中心導体9の外部導出部9
bが上記アース電極11と非接触状態で基板6を貫通し
て接続されている。上記誘電体基板6を挟んで対向する
コンデンサ電極12a−12Cとアース電極11とで、
また上記中心導体9の外部導出部9bとで並列共振回路
が構成されていそして、上記第1.第2コンデンサ電極
12a。
Further, the dielectric substrate 6 is formed into a rectangular flat plate shape, and a ground electrode 11 is formed on the entire lower surface of the dielectric substrate 6, and the ground electrode 11 is in contact with the upper ferrite lOb. Further, on the upper surface of the dielectric substrate 6, there are first holes on the left and right sides of the upper portion when this is mounted. A third capacitor electrode 12C is formed at the center of the lower part of the second capacitor electrodes 12a, 12b. Each of the capacitor electrodes 122 to 12C has an external lead-out portion 9 of each of the central conductors 9.
b is connected to the ground electrode 11 through the substrate 6 in a non-contact state. The capacitor electrodes 12a to 12C and the ground electrode 11 face each other with the dielectric substrate 6 in between,
Further, a parallel resonant circuit is constituted by the external lead-out portion 9b of the central conductor 9, and the first. Second capacitor electrode 12a.

12bには導出ラインエ3の一端が接続されており、他
端は誘電体基[6の一側縁6aに導出されている。さら
に、上記両導出ライン13及び第3コンデンサ電極13
c上には上記各入出力端子15の一端部15aが接続さ
れており、他端部15bは上記ケース本体2の一側壁に
切り欠き形成された開口部2bから外方に突出している
。これにより、上記各端子15はケース本体2から同一
方向に突出している。
One end of the lead-out line 3 is connected to 12b, and the other end is led out to one side edge 6a of the dielectric base [6]. Furthermore, both the lead-out lines 13 and the third capacitor electrode 13
One end 15a of each of the input/output terminals 15 is connected to the terminal c, and the other end 15b projects outward from an opening 2b cut out in one side wall of the case body 2. As a result, each of the terminals 15 protrudes from the case body 2 in the same direction.

次に本実施例の作用効果について説明する。Next, the effects of this embodiment will be explained.

本実施例のサーキュレータ1は、信号の逆流を防止する
機能を有しており、マイクロ波通信機器、例えば自動車
電話、携帯電話等の移動通信装置に必要不可欠な部品で
ある。そして、本実施例のサーキュレータ1をプリント
基板上に実装する場合は、ケース本体2を立てた状態で
上記プリント基板のパターンに入出力端子15を半田付
は接続するとともに、上記ケース本体2の固定片14を
差し込んで固定する。
The circulator 1 of this embodiment has a function of preventing backflow of signals, and is an essential part of microwave communication equipment, for example, mobile communication devices such as car phones and mobile phones. When the circulator 1 of this embodiment is mounted on a printed circuit board, the input/output terminals 15 are connected by soldering to the pattern of the printed circuit board with the case body 2 upright, and the case body 2 is fixed. Insert and secure the piece 14.

このように本実施例によれば、誘電体基板6を平板状に
形成したので、従来の誘電体基板に中央孔を形成する場
合に比べて該基Fi6の表面積を拡大できるから、基板
を大型化することなく第1゜第2コンデンサ11i12
 a、  12 bを導出ライン13により誘電体基板
6の一側縁6aに容易に導出することができ、ケース本
体2から人、出力端子15を同一方向に突出することが
できる。その結果、従来構造では困難であった立型タイ
プが実現でき、実装スペースを約1/2に縮小でき、近
年の電子機器の小型化の要請に対応できる。ここで、本
実施例では上部フェライト1obを誘電体基板6のアー
ス電極11に、下部フェライト10bをシールド部9a
を介してアース板4に接続したので、電気的アースを確
実にとれる。
According to this embodiment, since the dielectric substrate 6 is formed into a flat plate shape, the surface area of the base Fi6 can be expanded compared to the case where a central hole is formed in a conventional dielectric substrate, so that the substrate can be made large. The first and second capacitors 11i12
a, 12b can be easily led out to one side edge 6a of the dielectric substrate 6 by the lead-out line 13, and the output terminals 15 can be projected from the case body 2 in the same direction. As a result, a vertical type, which was difficult to achieve with conventional structures, can be realized, and the mounting space can be reduced to approximately 1/2, thus meeting the recent demand for miniaturization of electronic devices. Here, in this embodiment, the upper ferrite 1ob is connected to the ground electrode 11 of the dielectric substrate 6, and the lower ferrite 10b is connected to the shield part 9a.
Since it is connected to the ground plate 4 via the ground plate 4, electrical grounding can be ensured.

なお、上記実施例では、3対の中心導体9を120度ご
とに折り曲げた場合を例にとって説明したが、本発明は
4対の中心導体を90度ごとに折り曲げてなるサーキュ
レータにも勿論適用でき、この場合も誘電体基板を平板
状に形成することにより各コンデンサ電極に導出ライン
を付加することができ、この場合も上記実施例と同様の
効果が得られる。
In the above embodiment, the case where three pairs of center conductors 9 are bent every 120 degrees was explained as an example, but the present invention can of course be applied to a circulator formed by bending four pairs of center conductors 9 every 90 degrees. Also in this case, by forming the dielectric substrate into a flat plate shape, a lead-out line can be added to each capacitor electrode, and in this case as well, the same effect as in the above embodiment can be obtained.

第5図ないし第7図は上記実施例における端子構造の他
の例を示し、図中、第1図ないし第4図と同一符号は同
−又は相当部分を示す。
5 to 7 show other examples of the terminal structure in the above embodiment, and in the figures, the same reference numerals as in FIGS. 1 to 4 indicate the same or corresponding parts.

第5図は、ビン形状の入出力端子2oを用いて、該端子
20をプリント基板に差し込んで実装する例である。ま
た、第6図は、各コンデンサ電極に接続された導出ライ
ン13を誘電体基板6の側面6aに延長して露出させ、
この露出部分を入出力電極として表面実装するようにし
た例である。さらに、第7図は、筒状のケース本体3o
の底壁30aから、ピン形状の人、出力端子31を突出
させた例である。このようにいずれの変形例においても
、誘電体基板を平板状に形成することにより実現でき、
上記実施例と同様の効果が得られる。
FIG. 5 shows an example in which a bottle-shaped input/output terminal 2o is used and the terminal 20 is inserted and mounted on a printed circuit board. Further, in FIG. 6, the lead-out lines 13 connected to each capacitor electrode are extended and exposed on the side surface 6a of the dielectric substrate 6,
This is an example in which the exposed portions are surface mounted as input/output electrodes. Furthermore, FIG. 7 shows a cylindrical case body 3o.
This is an example in which a pin-shaped output terminal 31 is made to protrude from the bottom wall 30a. In this way, any of the modified examples can be realized by forming the dielectric substrate into a flat plate shape.
The same effects as in the above embodiment can be obtained.

〔発明の効果〕〔Effect of the invention〕

以上のように本発明に係る非可逆回路素子にょねば、誘
電体基板を平板状に形威し、該基板上の各インピーダン
ス整合1i極を導出ラインにより上記誘電体基板の一例
縁に導出したので、該基板を大型化させることな(導出
ラインを付加することができ、ひいては実装スペースを
縮小でき、装置の小型化に対応できる効果がある。
As described above, in the non-reciprocal circuit element according to the present invention, the dielectric substrate is shaped into a flat plate, and each impedance matching pole 1i on the substrate is led out to one edge of the dielectric substrate by a lead-out line. , it is possible to add a lead-out line without increasing the size of the board, and as a result, the mounting space can be reduced, which has the effect of being able to respond to miniaturization of the device.

【図面の簡単な説明】[Brief explanation of drawings]

第1図ないし第4図は本発明の一実施例によるサーキュ
レータを説明するための図であり、第1図はその誘電体
基板に端子ブロック、)鳳ライト組立て体を接続する状
態を示す分解斜視図、第2図はそのサーキュレータの斜
視図、第3図はその断面図、第4図はその分解斜視図、
第5図ないし第7図はそれぞれ上記実施例の他の例を示
す斜視図、第8図fa)及び山)はそれぞれ従来のサー
キュレータを示す分解斜視図、平面図、第9図はその平
面図である。 図において、1はサーキュレータ(非可逆回路素子)、
2.30はケース本体、5はフェライト組立て体、6は
誘電体基板、6aは誘電体基板の一例縁、9は中心導体
、10a、10bはフェライト、12a〜12Cはコン
デンサ電極(インピーダンス整合電極)5.13は導出
ライン、15゜20.31は人、出力端子、15aは端
子の一端部、15bは他端部である。
1 to 4 are diagrams for explaining a circulator according to an embodiment of the present invention, and FIG. 1 is an exploded perspective view showing a state in which a terminal block and a) Otori light assembly are connected to the dielectric substrate. Figure 2 is a perspective view of the circulator, Figure 3 is a sectional view thereof, Figure 4 is an exploded perspective view thereof,
5 to 7 are perspective views showing other examples of the above embodiment, FIG. 8 fa) and crest) are exploded perspective views and plan views showing conventional circulators, respectively, and FIG. 9 is a plan view thereof. It is. In the figure, 1 is a circulator (irreciprocal circuit element),
2.30 is the case body, 5 is the ferrite assembly, 6 is the dielectric substrate, 6a is an example of the dielectric substrate, 9 is the center conductor, 10a, 10b are the ferrites, 12a to 12C are capacitor electrodes (impedance matching electrodes) 5.13 is a lead-out line, 15°20.31 is a person, an output terminal, 15a is one end of the terminal, and 15b is the other end.

Claims (1)

【特許請求の範囲】[Claims] (1)電気的絶縁状態で交叉状に配置された複数の中心
導体とフェライトとの組立て体と、該各中心導体に接続
されるインピーダンス整合電極が形成された誘電体基板
とをケース内に収容してなる非可逆回路素子において、
上記誘電体基板を平板状に形成するとともに上記組立体
の一主面側に配置し、該基板の主面に上記インピーダン
ス整合電極を形成し、該各整合電極を導出ラインにより
上記誘電体基板の一側縁に導出したことを特徴とする非
可逆回路素子。
(1) A case houses an assembly of a plurality of center conductors and ferrite arranged in a crosswise manner in an electrically insulated state, and a dielectric substrate on which impedance matching electrodes connected to each center conductor are formed. In a non-reciprocal circuit element made of
The dielectric substrate is formed into a flat plate shape and placed on one main surface of the assembly, the impedance matching electrode is formed on the main surface of the substrate, and each matching electrode is connected to the dielectric substrate by a lead-out line. A non-reciprocal circuit element characterized by being led out on one side edge.
JP21102089A 1989-08-16 1989-08-16 Irreversible circuit element Pending JPH0374901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21102089A JPH0374901A (en) 1989-08-16 1989-08-16 Irreversible circuit element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21102089A JPH0374901A (en) 1989-08-16 1989-08-16 Irreversible circuit element

Publications (1)

Publication Number Publication Date
JPH0374901A true JPH0374901A (en) 1991-03-29

Family

ID=16599022

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21102089A Pending JPH0374901A (en) 1989-08-16 1989-08-16 Irreversible circuit element

Country Status (1)

Country Link
JP (1) JPH0374901A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6559732B2 (en) * 2000-06-14 2003-05-06 Murata Manufacturing Co., Ltd. Nonreciprocal circuit device with main surfaces of the ferrite and magnet perpendicular to the mounting substrate

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01198802A (en) * 1987-10-07 1989-08-10 Murata Mfg Co Ltd Irreversible circuit element

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01198802A (en) * 1987-10-07 1989-08-10 Murata Mfg Co Ltd Irreversible circuit element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6559732B2 (en) * 2000-06-14 2003-05-06 Murata Manufacturing Co., Ltd. Nonreciprocal circuit device with main surfaces of the ferrite and magnet perpendicular to the mounting substrate

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