JP3533602B2 - High frequency noise filter - Google Patents
High frequency noise filterInfo
- Publication number
- JP3533602B2 JP3533602B2 JP2000090404A JP2000090404A JP3533602B2 JP 3533602 B2 JP3533602 B2 JP 3533602B2 JP 2000090404 A JP2000090404 A JP 2000090404A JP 2000090404 A JP2000090404 A JP 2000090404A JP 3533602 B2 JP3533602 B2 JP 3533602B2
- Authority
- JP
- Japan
- Prior art keywords
- noise filter
- frequency noise
- high frequency
- conductor
- line conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004020 conductor Substances 0.000 claims description 46
- 239000002131 composite material Substances 0.000 claims description 11
- 239000000696 magnetic material Substances 0.000 claims description 10
- 239000006247 magnetic powder Substances 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 239000011324 bead Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Coils Or Transformers For Communication (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【発明の属する技術分野】本発明は、高速信号伝送系を
有するデジタル回路などから放射される電磁妨害波を抑
制する高周波用ノイズフィルタに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency noise filter for suppressing electromagnetic interference waves radiated from a digital circuit having a high speed signal transmission system.
【０００２】[0002]
【従来の技術】近年、デジタル回路の伝送速度は高まる
傾向にあり、基本クロックはＧＨｚ領域に近づいてい
る。このため、デジタル回路から発生する電磁妨害波も
より高い周波数に拡大する傾向にある。このようなデジ
タル回路を有する電子機器から発生するクロックなどの
高調波成分からなる電磁妨害波の抑制する部品として、
ノイズフィルタなどが知られている。2. Description of the Related Art In recent years, the transmission speed of digital circuits has been increasing and the basic clock is approaching the GHz range. Therefore, the electromagnetic interference wave generated from the digital circuit also tends to expand to a higher frequency. As a component that suppresses electromagnetic interference waves composed of harmonic components such as clocks generated from electronic devices having such digital circuits,
Noise filters and the like are known.
【０００３】図５は従来のノイズフィルタの一例を示す
斜視図である。図５に示すように、プリント基板５１上
に線路導体５２が形成され、これらの導体線路５２によ
って基板に搭載されたＩＣ、コネクタ等の電子部品５３
が夫々接続されている。図５の右側の電子部品５３はコ
ネクタで、ケーブル５４が接続されている。プリント基
板５１の線路導体５２は、チップビーズ５５の搭載部分
において、その電極間距離に相当する距離だけ切り離さ
れて設けられており、この切り離された部分の上に夫々
のチップビーズ５５が、夫々の電極を、切り離された線
路導体端部に夫々接続するように搭載されている。これ
らのチップビーズ５５は、プリント基板５１の線路導体
５２に直列的に装着されるノイズフィルタの機能を有す
る素子である。これらの素子は、主に磁性体で構成さ
れ、内部に導体を有しており、電気的にはインダクタ要
素と、高周波領域で増大する磁気損失に基づく抵抗成分
とを有する。FIG. 5 is a perspective view showing an example of a conventional noise filter. As shown in FIG. 5, line conductors 52 are formed on a printed circuit board 51, and electronic components 53 such as ICs and connectors mounted on the circuit board by these conductor lines 52.
Are connected to each other. The electronic component 53 on the right side of FIG. 5 is a connector, to which a cable 54 is connected. The line conductor 52 of the printed circuit board 51 is provided so as to be separated by a distance corresponding to the distance between the electrodes in the mounting portion of the chip beads 55, and the chip beads 55 are respectively provided on the separated portions. The electrodes are mounted so as to be connected to the separated line conductor ends, respectively. These chip beads 55 are elements having a function of a noise filter that are mounted in series on the line conductor 52 of the printed board 51. These elements are mainly composed of a magnetic material, have a conductor inside, and electrically have an inductor element and a resistance component based on magnetic loss increasing in a high frequency region.
【０００４】近年、この種のチップビーズ５５は、面実
装化に適する構造で広く利用されている。しかし、利用
においては、予め装着に応じたプリント基板上の配置
と、線路導体上に装着のための電極を設置しておく必要
があり、電磁妨害波の元となる不要高調波電流の経路が
不明であることから、一般に多数個の素子がプリント基
板上に装着されている。In recent years, this type of chip bead 55 has been widely used in a structure suitable for surface mounting. However, in use, it is necessary to previously arrange on the printed circuit board according to the mounting and the electrodes for mounting on the line conductor, and the path of the unnecessary harmonic current that is the source of the electromagnetic interference wave Since it is unknown, many elements are generally mounted on the printed circuit board.
【０００５】[0005]
【発明が解決しようとする課題】前述したように、チッ
プビーズは、デジタル回路を有する電子機器から発生す
るクロックなどの高調波成分からなる電磁妨害波を抑制
する部品として機能を有する。しかしながら、これらの
チップビーズは、装着位置が適切に選択されれば効果を
発揮するが、一般に電磁妨害波の発生量はデジタル回路
基板を含む全体装置によって最終的に決まるため、プリ
ント基板の設計段階で適切なチップビーズの装着位置を
確定するのが困難な場合が多く、複数回のプリント基板
の試作、および評価で最終的な配置が決定されることが
多い。このため、チップビーズをノイズフィルタとして
用いたプリント基板では、費用および開発時間を多く費
やしコスト高となる傾向にあった。As described above, the chip beads have a function as a component for suppressing an electromagnetic interference wave composed of a harmonic component such as a clock generated from an electronic device having a digital circuit. However, these chip beads are effective if the mounting position is properly selected, but in general, the amount of electromagnetic interference is ultimately determined by the entire device including the digital circuit board, so the design stage of the printed circuit board In many cases, it is difficult to determine the appropriate mounting position of the chip beads, and the final placement is often determined by trial production and evaluation of the printed circuit board a plurality of times. For this reason, the printed circuit board using the chip beads as a noise filter tends to increase the cost due to much cost and development time.
【０００６】そこで、本発明の技術的課題は、プリント
基板等の電子回路の線路配置や設計を変更することなく
簡便な手段で、高調波成分からなる電磁妨害波の抑制を
可能にする高周波ノイズフィルタを提供することにあ
る。Therefore, the technical problem of the present invention is to provide a high-frequency noise that enables suppression of electromagnetic interference waves composed of harmonic components by a simple means without changing the line layout or design of an electronic circuit such as a printed circuit board. To provide a filter.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するた
め、本発明では、回路基板上の線路導体上に回路を切断
することなく装着でき、複数の導体上にまたがって１個
の素子にて電磁妨害波の抑制を可能とする高周波用ノイ
ズフィルタを提供するものである。In order to solve the above-mentioned problems, according to the present invention, a circuit can be mounted on a line conductor on a circuit board without cutting, and a single element can be formed over a plurality of conductors. It is intended to provide a high frequency noise filter capable of suppressing an electromagnetic interference wave.
【０００８】即ち、本発明によれば、高周波領域で複素
透磁率の磁気損失成分が大である磁性体を含む薄板状ま
たはシート状の構成体と前記構成体の一方の面に形成さ
れた少なくても２本の夫々互いに平行な導体電極とを備
えており、プリント基板の線路導体と前記導体電極が互
いに交差する様な方向に装着されていることを特徴とす
る高周波用ノイズフィルタが得られる。That is, according to the present invention, a thin plate-like or sheet-like structure containing a magnetic material having a large magnetic loss component of complex permeability in a high frequency region and a small amount formed on one surface of the structure. However, it has two conductor electrodes parallel to each other , and the line conductor of the printed circuit board and the conductor electrode are mutually parallel.
A high-frequency noise filter is obtained which is characterized in that it is mounted in a direction so as to intersect with each other .
【０００９】また、本発明によれば、前記高周波用ノイ
ズフィルタにおいて、前記構成体は、合成樹脂と、金属
磁性粉末との複合体から実質的になることを特徴とする
高周波用ノイズフィルタが得られる。Further, according to the present invention, in the high frequency noise filter, the high frequency noise filter is characterized in that the constituent body is substantially composed of a composite of synthetic resin and metallic magnetic powder. To be
【００１０】また、本発明によれば、前記高周波用ノイ
ズフィルタにおいて、前記構成体は矩形板形状を備えて
いることを特徴とする高周波用ノイズフィルタが得られ
る。Further, according to the present invention, in the high-frequency noise filter, the high-frequency noise filter is obtained in which the structure has a rectangular plate shape.
【００１１】また、本発明によれば、前記いずれかの高
周波用ノイズフィルタにおいて、前記高周波用ノイズフ
ィルタは、電子部品を互いに接続する信号線路導体及び
グランド線路導体の内の少なくとも一方の線路上に設け
られることを特徴とする高周波用ノイズフィルタが得ら
れる。According to the present invention, in any one of the high frequency noise filters, the high frequency noise filter is provided on at least one of a signal line conductor and a ground line conductor which connect electronic components to each other. A high frequency noise filter characterized by being provided is obtained.
【００１２】また、本発明によれば、前記高周波用ノイ
ズフィルタにおいて、プリント配線基板又はフラットケ
ーブルに設けられることを特徴とする高周波用ノイズフ
ィルタが得られる。Further, according to the present invention, in the high frequency noise filter, a high frequency noise filter is provided which is provided on a printed wiring board or a flat cable.
【００１３】さらに、本発明によれば、前記いずれかの
高周波用ノイズフィルタにおいて、前記高周波用ノイズ
フィルタは、プリント基板の線路導体上に、当該ノイズ
フィルタの互いに平行な導体電極が前記プリント基板の
線路導体と接しない反対面が向くように配置されている
ことを特徴とする高周波用ノイズフィルタが得られる。Further, according to the present invention, in any one of the high frequency noise filters, the high frequency noise filter has conductor electrodes parallel to each other on the line conductor of the printed circuit board of the printed circuit board. that are disposed such that the opposite face which is not in contact with the line conductor
High-frequency noise filter, wherein the call is obtained.
【００１４】要するに、本発明の高周波用ノイズフィル
タは、高周波領城で大なる磁気損失を有する磁性体から
なる薄板、または複合磁性シートの構成体と、この構成
体の片面には一定幅（Ｗ１）、長さ（Ｌ１）をもち、一
定間隔（Ｗ２）をもって複数個形成された導体電極とを
備えた高周波用ノイズフィルタである。In short, the high frequency noise filter of the present invention comprises a thin plate or composite magnetic sheet structure made of a magnetic material having a large magnetic loss in a high frequency region, and a constant width (W1) on one side of the structure. ), A high-frequency noise filter having a length (L1) and a plurality of conductor electrodes formed at regular intervals (W2).
【００１５】また、この高周波用ノイズフィルタを、当
該ノイズフィルタの互いに平行な導体電極がプリント基
板の線路導体と接しない反対面が向く配置になるように
装着し、かつ該平行導体電極は線路導体と交差、好まし
くは、直交するような方向に装着することにより簡便な
手段で、高調波成分からなる電磁妨害波の抑制を可能に
するものである。The high-frequency noise filter is mounted so that the conductor electrodes of the noise filter, which are parallel to each other, face opposite sides of the printed circuit board, which are not in contact with the line conductors, and the parallel conductor electrodes are line conductors. It is possible to suppress an electromagnetic interference wave composed of a harmonic component by a simple means by mounting it in a direction intersecting with, and preferably in a direction orthogonal to each other.
【００１６】[0016]
【発明の実施の形態】以下、本発明に係る高周波用ノイ
ズフィルタの実施の形態について、図面に従って説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a high frequency noise filter according to the present invention will be described below with reference to the drawings.
【００１７】図１は本発明の実施の形態による高周波用
ノイズフィルタの基本構成を示す斜視図である。FIG. 1 is a perspective view showing the basic structure of a high frequency noise filter according to an embodiment of the present invention.
【００１８】図１に示すように、高周波用ノイズフィル
タ１は、薄板または複合磁性シートからなる構成体を備
え、プリント基板５１に形成された線路導体５２に密着
するように装着されている。高周波用ノイズフィルタ１
は、高周波領域で伝送特性の減衰効果を示す素子を構成
するもので、高周波領域で磁気損失を有する磁性体から
なる薄板または磁性粉末を樹脂と混合した複合磁性シー
トからなる構成体を備えて構成されている。As shown in FIG. 1, the high frequency noise filter 1 comprises a thin plate or a composite magnetic sheet, and is mounted in close contact with a line conductor 52 formed on a printed circuit board 51. High frequency noise filter 1
Is a device that exhibits an attenuation effect of transmission characteristics in a high frequency region, and is configured by including a thin plate made of a magnetic material having magnetic loss in a high frequency region or a composite magnetic sheet in which magnetic powder is mixed with resin. Has been done.
【００１９】この構成体の減衰性能は、用いる磁性材
料、および形状によつて夫々異なる特性を示す。The damping performance of this structure shows different characteristics depending on the magnetic material used and the shape.
【００２０】図２は図１の構成体の伝送特性の一例を示
す図である。図２に示すように、減衰特性（Ｓ２１）及
び反射特性（Ｓ１１）が得られる。特に、金属磁性粉
末、例えば、センダスト（商品名）、鉄を含む磁性材料
（Ｆｅ−Ａｌ−Ｏ）等を樹脂に混入した複合磁性シート
（図２の複合磁性体シートＡ３２）は、高周波領域で大
きな減衰特性を示している。減衰特性は磁性材料のもつ
透磁率の複素成分による磁気損失に起因していると考え
られ、高周波領域でその効果が発揮される。この解析
は、本発明者等が報告した論文（電気情報通信学会、環
境電磁工学研究会報告：「複合磁性シートの線路装着に
よる伝導電磁雑音の低減効果」ＥＭＣＪ９９・１１、Ｐ
Ｐ３７−ＰＰ４２，１９９９）に詳細を述べられてい
る。この原理を利用することで、挿入に際し、線路導体
２を切断することなく簡便な電磁妨害波の抑制手段とな
るノイズフィルタを得ることができる。FIG. 2 is a diagram showing an example of transmission characteristics of the structure of FIG. As shown in FIG. 2, the attenuation characteristic (S21) and the reflection characteristic (S11) are obtained. In particular, a composite magnetic sheet (composite magnetic material sheet A32 of FIG. 2) obtained by mixing metal magnetic powder, for example, Sendust (trade name), a magnetic material containing iron (Fe-Al-O), etc. in a resin is used in a high frequency region. It shows a large damping characteristic. It is considered that the attenuation characteristic is caused by the magnetic loss due to the complex component of the magnetic permeability of the magnetic material, and the effect is exhibited in the high frequency region. This analysis is based on a paper reported by the present inventors (report by the Institute of Electrical, Information and Communication Engineers, Research Committee on Environmental Electromagnetic Engineering: "Effect of Conducted Electromagnetic Noise Reduction by Attaching Lines of Composite Magnetic Sheet" EMCJ99 / 11, P.
P37-PP42, 1999). By utilizing this principle, it is possible to obtain a noise filter that serves as a simple means for suppressing electromagnetic interference waves without cutting the line conductor 2 during insertion.
【００２１】図３は本発明の実施の形態による高周波用
ノイズフィルタの説明に供せられる斜視図である。図３
に示すように、高周波用ノイズフィルタ１は、高周波領
域で大なる磁気損失を有する磁性体からなる矩形の薄
板、または複合磁性シートからなる構成体２を有してい
る。この構成体２の片面には一定幅（Ｗ１）、長さ（Ｌ
１）をもつ導体電極３が一定間隔（Ｗ２）をもって互い
に平行となるように複数個形成されている。ここで、構
成体２としてはプリント基板への装着の容易牲、および
形状の自由度が大であることから柔軟性、および加工性
に富む複合磁性シートが望ましいが必ずしもこれに限定
されるものではない。また、導体電極３は印刷、あるい
は金属片の接着などで形成される。この複数本の導体電
極３は、伝送特性の減衰量を改善する効果がある。特
に、高周波領城での減衰帯域か改善に効果がある。FIG. 3 is a perspective view provided for explaining a high frequency noise filter according to an embodiment of the present invention. Figure 3
As shown in, the high frequency noise filter 1 has a rectangular thin plate made of a magnetic material having a large magnetic loss in a high frequency region, or a structural body 2 made of a composite magnetic sheet. A fixed width (W1) and a length (L
A plurality of conductor electrodes 3 having 1) are formed in parallel with each other at a constant interval (W2). Here, the composite body 2 is preferably a composite magnetic sheet having high flexibility and workability because it is easy to mount on the printed circuit board and has a high degree of freedom in shape, but it is not necessarily limited to this. Absent. The conductor electrode 3 is formed by printing or adhering a metal piece. The plurality of conductor electrodes 3 has an effect of improving the attenuation amount of the transmission characteristic. In particular, it is effective in improving the attenuation band in high-frequency castles.
【００２２】尚、図３の例では、構成体２について、長
方形（矩形）状を有するものを示したが、円形、あるい
は各種異形の構造も取りうることができる。In the example of FIG. 3, the structure 2 is shown to have a rectangular shape, but it may have a circular shape or various irregular shapes.
【００２３】図４は図３に示した本発明の実施の形態に
よる高周波用ノイズフィルタ１の適用例を示す斜視図で
ある。FIG. 4 is a perspective view showing an application example of the high frequency noise filter 1 according to the embodiment of the present invention shown in FIG.
【００２４】図４に示すように、回路基板５１上には、
ＩＣ及び外部への接続コネクタ等の電子部品５３が搭載
されており、これらの電子部品５３は、回路基板５１に
形成された線路導体５２によって互いに接続されてい
る。線路導体５２上の適切な位置にノイズフィルタ１が
装着される。ここで、適切な位置とは、電磁妨害波の基
となる高調波電流が流れると想定される線路導体５２
と、周辺電子部品５３などに対して装着に支障のない位
置を呼ぶ。As shown in FIG. 4, on the circuit board 51,
An electronic component 53 such as an IC and a connector for connecting to the outside is mounted, and these electronic components 53 are connected to each other by a line conductor 52 formed on a circuit board 51. The noise filter 1 is mounted at an appropriate position on the line conductor 52. Here, the appropriate position means the line conductor 52 in which a harmonic current, which is a base of the electromagnetic interference wave, is supposed to flow.
Is referred to as a position that does not hinder the mounting of the peripheral electronic component 53 and the like.
【００２５】本発明の実施の形態によるノイズフィルタ
１においては、装着に際し、従来のチップビーズのよう
に、チップビーズの電極間の距離分だけ線路導体５２を
切断する必要はない。また、単独、または複数の線路導
体５２にまたがって使用することができ、１個のノイズ
フィルタにて電磁妨害波の抑制が可能となる。In the noise filter 1 according to the embodiment of the present invention, it is not necessary to cut the line conductor 52 by the distance between the electrodes of the chip beads when mounting, unlike the conventional chip beads. In addition, it can be used alone or across a plurality of line conductors 52, and it is possible to suppress electromagnetic interference waves with one noise filter.
【００２６】また、装着に際し、本発明の実施の形態に
よるノイズフィルタ１は、ノイズフィルタ１上に形成さ
れた平行な導体電極３が形成された面が、プリント基板
５１の線路導体５２と接しない反対面上を向き、かつそ
の平行な導体電極３の延在する方向は線路導体５２と直
交する方向に配置されて装着される。このような配置を
とることで高周波域での電磁雑音の抑制効果の周波数帯
域を拡大することが可能となる。In addition, in mounting, in the noise filter 1 according to the embodiment of the present invention, the surface on which the parallel conductor electrodes 3 formed on the noise filter 1 are not in contact with the line conductor 52 of the printed circuit board 51. The conductor electrodes 3 facing the opposite surface and extending in parallel are arranged and mounted in a direction orthogonal to the line conductor 52. With such an arrangement, it is possible to expand the frequency band of the effect of suppressing electromagnetic noise in the high frequency range.
【００２７】[0027]
【発明の効果】以上説明したように、本発明による高周
波用ノイズフィルタによれば、高周波城で適用可能な、
装着が簡便で電磁雑音の抑制効果が大きい製品を提供で
き、今後、増加する高速のデジタル回路などから放射さ
れる電磁妨害波の低減に対してその効果は大である。As described above, the high frequency noise filter according to the present invention can be applied to high frequency castles.
It is possible to provide a product that is easy to install and has a great effect of suppressing electromagnetic noise, and the effect will be great in the reduction of electromagnetic interference waves radiated from high-speed digital circuits which will increase in the future.
【図１】本発明の実施の形態による高周波用ノイズフィ
ルタの基本構成の説明に供せられる斜視図である。FIG. 1 is a perspective view provided for explaining a basic configuration of a high frequency noise filter according to an embodiment of the present invention.
【図２】図１の高周波用ノイズフィルタの減哀特性の例
を示す図である。FIG. 2 is a diagram showing an example of a deterioration characteristic of the high frequency noise filter of FIG.
【図３】本発明の実施の形態による高周波用ノイズフィ
ルタの斜視図である。FIG. 3 is a perspective view of a high frequency noise filter according to an embodiment of the present invention.
【図４】図３の高周波用ノイズフィルタの適用例を示す
斜視図である。FIG. 4 is a perspective view showing an application example of the high frequency noise filter of FIG.
【図５】従来技術によるノイズフィルタの一例を示す斜
視図である。FIG. 5 is a perspective view showing an example of a conventional noise filter.
１，５０ ノイズフィルタ ２ 構成体 ３ 導体電極 ５１ プリント（回路）基板 ５２ 線路導体 ５３ 電子部品 ５４ ケーブル ５５ チップビーズ 1,50 noise filter 2 components 3 conductor electrode 51 Printed circuit board 52 line conductor 53 Electronic components 54 cable 55 Chip beads
───────────────────────────────────────────────────── フロントページの続き (72)発明者 篠原 愼一 宮城県仙台市青葉区南吉成六丁目６番地 の３ 株式会社環境電磁技術研究所内 (56)参考文献 特開 平９−312489（ＪＰ，Ａ) 特開2001−135525（ＪＰ，Ａ) 特開 平８−190812（ＪＰ，Ａ) 特開 平８−250891（ＪＰ，Ａ) 特開 平８−8575（ＪＰ，Ａ) 実開 平１−174997（ＪＰ，Ｕ) 実開 平６−29197（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H05K 9/00 H01F 1/00 - 1/375 H01F 17/06 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shinichi Shinohara 3-6-6 Minamiyoshinari, Aoba-ku, Sendai-shi, Miyagi Inside Institute for Environmental Electromagnetic Research (56) Reference JP-A-9-312489 (JP, A) JP-A-2001-135525 (JP, A) JP-A-8-190812 (JP, A) JP-A-8-250891 (JP, A) JP-A-8-8575 (JP, A) Actual Kaihei 1-174997 ( JP, U) Actual Kaihei 6-29197 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) H05K 9/00 H01F 1/00-1/375 H01F 17/06
Claims (6)
が大である磁性体を含む薄板状またはシート状の構成体
と前記構成体の一方の面に形成された少なくても２本の
夫々互いに平行な導体電極とを備えており、プリント基
板の線路導体と前記導体電極が互いに交差する様な方向
に装着されていることを特徴とする高周波用ノイズフィ
ルタ。1. A thin plate-like or sheet-like structure containing a magnetic material having a large magnetic loss component of complex magnetic permeability in a high frequency region, and at least two of each structure formed on one surface of the structure. It has conductor electrodes parallel to each other ,
Direction such that the line conductor of the plate and the conductor electrode intersect each other
A high-frequency noise filter that is attached to the .
において、前記構成体は、合成樹脂と、金属磁性粉末と
の複合体から実質的になることを特徴とする高周波用ノ
イズフィルタ。2. The high frequency noise filter according to claim 1, wherein the constituent body is substantially composed of a composite of synthetic resin and metallic magnetic powder.
において、前記構成体は矩形板形状を備えていることを
特徴とする高周波用ノイズフィルタ。3. The high frequency noise filter according to claim 1, wherein the structural body has a rectangular plate shape.
高周波用ノイズフィルタにおいて、前記高周波用ノイズ
フィルタは、電子部品を互いに接続する信号線路導体及
びグランド線路導体の内の少なくとも一方の線路上に設
けられることを特徴とする高周波用ノイズフィルタ。4. The high frequency noise filter according to claim 1, wherein the high frequency noise filter is at least one of a signal line conductor and a ground line conductor that connect electronic components to each other. A high-frequency noise filter, which is provided on a line.
において、プリント配線基板又はフラットケーブルに設
けられることを特徴とする高周波用ノイズフィルタ。5. The high frequency noise filter according to claim 4, wherein the high frequency noise filter is provided on a printed wiring board or a flat cable.
高周波用ノイズフィルタにおいて、前記高周波用ノイズ
フィルタは、プリント基板の線路導体上に、当該ノイズ
フィルタの互いに平行な導体電極が前記プリント基板の
線路導体と接しない反対面が向くように配置されている
ことを特徴とする高周波用ノイズフィルタ。6. The high frequency noise filter according to claim 1, wherein the high frequency noise filter has conductor electrodes parallel to each other on a line conductor of a printed circuit board. that are disposed such that the opposite face which is not in contact with the printed circuit board of the line conductor
High-frequency noise filter which is characterized a call.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000090404A JP3533602B2 (en) | 2000-03-29 | 2000-03-29 | High frequency noise filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000090404A JP3533602B2 (en) | 2000-03-29 | 2000-03-29 | High frequency noise filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001284129A JP2001284129A (en) | 2001-10-12 |
| JP3533602B2 true JP3533602B2 (en) | 2004-05-31 |
Family
ID=18606014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000090404A Expired - Fee Related JP3533602B2 (en) | 2000-03-29 | 2000-03-29 | High frequency noise filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3533602B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4959617B2 (en) * | 2008-03-28 | 2012-06-27 | 日本オプネクスト株式会社 | Optical transmission circuit |
-
2000
- 2000-03-29 JP JP2000090404A patent/JP3533602B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001284129A (en) | 2001-10-12 |
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