JPH06216605A - Stripline filter - Google Patents
Stripline filterInfo
- Publication number
- JPH06216605A JPH06216605A JP1256893A JP1256893A JPH06216605A JP H06216605 A JPH06216605 A JP H06216605A JP 1256893 A JP1256893 A JP 1256893A JP 1256893 A JP1256893 A JP 1256893A JP H06216605 A JPH06216605 A JP H06216605A
- Authority
- JP
- Japan
- Prior art keywords
- ground conductor
- stripline filter
- input
- resonance
- main surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、携帯電話機等に用いら
れるストリップライン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 stripline filter used for mobile phones and the like.
【０００２】[0002]
【従来の技術】高周波数帯域において用いられる誘電体
フィルタの一つとして、誘電体基板の表面にストリップ
ライン状共振線路導体を配した、図６のようなストリッ
プラインフィルタが知られている。2. Description of the Related Art As one of dielectric filters used in a high frequency band, there is known a stripline filter having a stripline resonance line conductor arranged on the surface of a dielectric substrate as shown in FIG.
【０００３】図６は従来のストリップラインフィルタの
主面の平面図であり、高誘電率を有する材料からなる誘
電体基板１の主面に、１／４波長型共振線路２、３、４
が片側短絡状態のインターディジタル形状にて複数段配
され、外部回路との接続を行うための入出力端子５ａ、
５ｂが、基板の側面及び裏面に配された接地導体６によ
って片側が短絡された線路状態で、前記共振線路と同一
面上に形成され、前記入出力端子線路と前記共振線路と
の線路間結合にて入出力結合が構成されている。FIG. 6 is a plan view of the main surface of a conventional stripline filter, in which a quarter-wavelength resonant line 2, 3, 4 is formed on the main surface of a dielectric substrate 1 made of a material having a high dielectric constant.
Are arranged in a plurality of stages in an interdigital form in which one side is short-circuited, and an input / output terminal 5a for connecting to an external circuit,
5b is formed on the same surface as the resonance line in a line state in which one side is short-circuited by the ground conductors 6 arranged on the side surface and the back surface of the substrate, and the line coupling between the input / output terminal line and the resonance line is performed. Input / output coupling is configured in.
【０００４】また、前記入出力端子５ａ、５ｂが図５に
示すように片側短絡状態の共振線路２、４に直接接続さ
れて、入出力結合が構成される場合もある。In some cases, the input / output terminals 5a and 5b are directly connected to the resonance lines 2 and 4 which are short-circuited on one side as shown in FIG.
【０００５】[0005]
【発明が解決しようとする課題】ところが、上記図５、
図６のような従来のストリップラインフィルタにおいて
は、入出力端子５ａ、５ｂが、基板の側面及び裏面に形
成された接地導体６によって短絡されているために、実
使用時にそのままではＤＣ電圧を印加できず、周辺回路
にコンデンサ等の部品が余分に必要になるという問題点
があった。However, as shown in FIG.
In the conventional stripline filter as shown in FIG. 6, since the input / output terminals 5a and 5b are short-circuited by the ground conductor 6 formed on the side surface and the back surface of the substrate, the DC voltage is applied as it is in actual use. However, there is a problem that extra parts such as capacitors are required in the peripheral circuit.
【０００６】本発明の目的は、上述のような従来技術の
問題点を解決するとともに、小型で高性能なストリップ
ラインフィルタを提供することにある。It is an object of the present invention to solve the above-mentioned problems of the prior art and to provide a compact and high performance stripline filter.
【０００７】[0007]
【課題を解決するための手段】本発明の第１の局面に従
ったストリップラインフィルタは、誘電体基板の主面に
共振線路が配され、前記主面の裏側の面に接地導体が配
されたストリップラインフィルタにおいて、前記接地導
体の前記共振線路の開放端部に対向する部分が切り欠き
除去され、該切り欠き部に前記接地導体から離れて入出
力端子が形成されていることを特徴とする。In a stripline filter according to a first aspect of the present invention, a resonance line is arranged on a main surface of a dielectric substrate, and a ground conductor is arranged on a surface on the back side of the main surface. In the stripline filter, a portion of the ground conductor facing the open end of the resonance line is cut away, and an input / output terminal is formed in the cutout portion apart from the ground conductor. To do.
【０００８】本発明の第２の局面に従ったストリップラ
インフィルタは、主面に共振線路が配され、前記主面の
裏側の面に接地導体が配された２枚の誘電体基板を、前
記主面の共振線路どうしが接触するように重ね合わせて
なるストリップラインフィルタにおいて、一方の誘電体
基板の前記接地導体の、前記共振線路の開放端部に対向
する部分が切り欠き除去され、該切り欠き部に前記接地
導体から離れて入出力端子が形成されていることを特徴
とする。In a stripline filter according to a second aspect of the present invention, a resonant line is arranged on the main surface, and two dielectric substrates having a ground conductor on the back surface of the main surface are provided. In a stripline filter in which resonant lines on the main surface are superposed so that they are in contact with each other, a portion of the ground conductor of one dielectric substrate facing the open end of the resonant line is cut away to remove the cutout. It is characterized in that an input / output terminal is formed in the notch portion apart from the ground conductor.
【０００９】さらに好ましくは、上記本発明の第１また
は第２の局面に従ったストリップラインフィルタにおい
て、前記共振線路が開放端側幅＞短絡端側幅のＳＩＲ
（ステップド・インピーダンス・レゾネータ）型構成で
あることを特徴とする。More preferably, in the stripline filter according to the first or second aspect of the present invention, the resonant line has an SIR of open end side width> short circuit end side width.
It is characterized by a (stepped impedance resonator) type configuration.
【００１０】[0010]
【作用】上記のような本発明の構成によれば、入出力端
子と共振線路が容量結合をすることになり、入出力端子
にＤＣ電圧が印加できるようなストリップラインフィル
タを得ることができる。According to the above-described structure of the present invention, the input / output terminal and the resonance line are capacitively coupled, and a stripline filter capable of applying a DC voltage to the input / output terminal can be obtained.
【００１１】また、共振線路を前記ＳＩＲ型にすること
によって、共振線路長を短縮しながら、入出力結合に寄
与する領域を拡げることが可能となる。Further, by making the resonant line the SIR type, it is possible to expand the region contributing to the input / output coupling while shortening the resonant line length.
【００１２】[0012]
【実施例】以下、本発明の実施例について図面を参照し
ながら説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】まず、本発明第１実施例によるストリップ
ラインフィルタの斜視図を図１に示す。また、図１の構
成をさらに理解しやすくするために、図１のＡ−Ｂ断面
を図２に、図１のＣ−Ｄ断面を図３に示す。First, a perspective view of a stripline filter according to a first embodiment of the present invention is shown in FIG. Further, in order to make the configuration of FIG. 1 easier to understand, an AB cross section of FIG. 1 is shown in FIG. 2 and a CD cross section of FIG. 1 is shown in FIG.
【００１４】図１〜図３のストリップラインフィルタ
は、厚さ約１．５ｍｍ、表面約７ｍｍ×１０ｍｍで高誘
電率（εr≒９０）のＴｉＯ2−Ｎｄ2Ｏ3−ＢａＯ系セラ
ミック材等からなる誘電体基板１の片側の表面（主面）
に、厚さ約１０μｍのＡｇ膜等からなる１／４波長型共
振線路２、３、４が片側短絡状態のインターディジタル
形状にて複数段配され、前記基板の側面及び裏面に接地
導体６が配され、前記裏面の接地導体の、前記共振線路
２、４の開放端部に対向する部分６２、６４が切り欠き
除去され、該切り欠き部に前記接地導体から離れて入出
力端子５２、５４が形成されている。The stripline filter shown in FIGS. 1 to 3 is made of a TiO 2 —Nd 2 O 3 —BaO ceramic material having a thickness of about 1.5 mm, a surface of about 7 mm × 10 mm, and a high dielectric constant (εr≈90). Surface of one side of the dielectric substrate 1 (main surface)
In addition, a plurality of quarter-wavelength resonant lines 2, 3, 4 made of an Ag film or the like having a thickness of about 10 μm are arranged in a plurality of stages in an interdigital form with one side short-circuited, and a ground conductor 6 is provided on the side surface and the back surface of the substrate. Portions 62 and 64 of the ground conductor on the back surface facing the open ends of the resonance lines 2 and 4 are removed by notching, and the notches are separated from the ground conductor to input / output terminals 52 and 54. Are formed.
【００１５】上記のような構成によれば、入出力端子５
２、５４と共振線路２、４が容量結合をすることにな
り、入出力端子にＤＣ電圧が印加できるようなストリッ
プラインフィルタとなる。According to the above configuration, the input / output terminal 5
The capacitive lines 2 and 54 and the resonant lines 2 and 4 are capacitively coupled, and the stripline filter can apply a DC voltage to the input / output terminals.
【００１６】次に、本発明第２実施例によるストリップ
ラインフィルタの主面の平面図を図４に示す。図４の構
成は、前記図１〜図３の構成を基本にしながら、基板１
の主面に設けられた１／４波長型共振線路２、３、４
が、開放端側幅Ｗｏ＞短絡端側幅ＷｓのＳＩＲ（ステッ
プド・インピーダンス・レゾネータ）型となっている。
図４のような構成によれば、前記図１〜図３の構成によ
る作用効果に加えて、共振線路長を短縮しながら、入出
力結合に寄与する領域を拡げることが可能となる。FIG. 4 is a plan view of the main surface of the stripline filter according to the second embodiment of the present invention. The configuration of FIG. 4 is based on the configurations of FIGS.
1/4 wavelength type resonance lines 2, 3, 4 provided on the main surface of
Is an SIR (Stepped Impedance Resonator) type in which the width Wo of the open end side> the width Ws of the short end side.
According to the configuration as shown in FIG. 4, in addition to the effect of the configurations shown in FIGS. 1 to 3, it is possible to expand the region contributing to the input / output coupling while reducing the resonant line length.
【００１７】次に、本発明第３実施例によるストリップ
ラインフィルタの分解斜視図を図７に示し、その組立体
の断面（図７のＥ−Ｆに沿った部分の組立断面）を図８
に示す。Next, an exploded perspective view of a stripline filter according to a third embodiment of the present invention is shown in FIG. 7, and a sectional view of its assembly (an assembled sectional view of a portion taken along line E-F in FIG. 7) is shown in FIG.
Shown in.
【００１８】図７、図８のストリップラインフィルタ
は、所謂トリプレート型のストリップラインフィルタで
あり、厚さ約１．５ｍｍ、表面約７ｍｍ×１０ｍｍで高
誘電率（εr≒９０）のＴｉＯ2−Ｎｄ2Ｏ3−ＢａＯ系セ
ラミック材等からなる、２枚の誘電体基板１ａ、１ｂそ
れぞれの片側の表面（主面）に、厚さ約１０μｍのＡｇ
膜等からなる１／４波長型共振線路２ａ、３ａ、４ａ、
２ｂ、３ｂ、４ｂが、片側短絡状態のインターディジタ
ル形状にてそれぞれ複数段配され、前記基板の側面及び
裏面に接地導体６ａ、６ｂが配され、一方の基板１ａの
前記裏面の接地導体６ａの、前記共振線路２ａ、４ａの
開放端部に対向する部分６２、６４が切り欠き除去さ
れ、該切り欠き部に前記接地導体から離れて入出力端子
５２、５４が形成されており、このような２枚の基板１
ａ、１ｂが、図８に示すように互いの共振線路どうしが
接触するように重ね合わされたものである。The stripline filters shown in FIGS. 7 and 8 are so-called triplate type stripline filters, and have a thickness of about 1.5 mm, a surface of about 7 mm × 10 mm, and a high dielectric constant (εr≈90) of TiO 2 −. On one surface (main surface) of each of the two dielectric substrates 1a and 1b made of Nd 2 O 3 —BaO ceramic material or the like, Ag having a thickness of about 10 μm is formed.
1/4 wavelength type resonance lines 2a, 3a, 4a made of films or the like,
2b, 3b, and 4b are arranged in a plurality of stages in an interdigital shape in which one side is short-circuited, ground conductors 6a and 6b are arranged on the side surface and the back surface of the board, and the ground conductor 6a on the back surface of one board 1a The portions 62 and 64 facing the open ends of the resonance lines 2a and 4a are cut away, and the input / output terminals 52 and 54 are formed in the cutout portions apart from the ground conductor. Two boards 1
a and 1b are superposed so that their resonance lines are in contact with each other as shown in FIG.
【００１９】上記のような構成によれば、入出力端子５
２、５４と共振線路２ａ、４ａが容量結合をすることに
なり、入出力端子にＤＣ電圧が印加できるようなトリプ
レート型のストリップラインフィルタとなる。According to the above configuration, the input / output terminal 5
The resonance lines 2a and 4a and the resonance lines 2a and 4a are capacitively coupled to form a triplate-type stripline filter in which a DC voltage can be applied to the input / output terminals.
【００２０】次に、本発明第４実施例によるストリップ
ラインフィルタの断面（前記図８に対応する部分の断
面）を図９に示す。図９の構成は、前記図７、図８の構
成を基本にしながら、２枚の基板１ａ、１ｂの厚さＴ
ａ、Ｔｂが異なることを特徴としており、入出力結合を
行う側の基板１ａの厚さや誘電率を変えることによっ
て、結合容量の値を設定する自由度が広がることを示す
ものである。Next, FIG. 9 shows a cross section (a cross section of a portion corresponding to FIG. 8) of the stripline filter according to the fourth embodiment of the present invention. The structure of FIG. 9 is based on the structures of FIGS. 7 and 8 and has a thickness T of two substrates 1a and 1b.
It is characterized in that a and Tb are different, and it shows that the degree of freedom in setting the value of the coupling capacitance is expanded by changing the thickness or the dielectric constant of the substrate 1a on the side for input / output coupling.
【００２１】次に、本発明第５実施例によるストリップ
ラインフィルタの分解斜視図を図１０に示す。図１０の
構成は、前記図７〜図８の構成を基本にしながら、基板
１ａ、１ｂの主面に設けられた１／４波長型共振線路２
ａ、３ａ、４ａ、２ｂ、３ｂ、４ｂが、開放端側幅Ｗｏ
＞短絡端側幅ＷｓのＳＩＲ（ステップド・インピーダン
ス・レゾネータ）型となっている。図１０のような構成
によれば、前記図７〜図９の構成による作用効果に加え
て、共振線路長を短縮しながら、入出力結合に寄与する
領域を拡げることが可能となる。FIG. 10 is an exploded perspective view of the stripline filter according to the fifth embodiment of the present invention. The configuration of FIG. 10 is based on the configurations of FIGS. 7 to 8 and is based on the configurations of FIGS.
a, 3a, 4a, 2b, 3b, and 4b are open end side width Wo
> It is a SIR (Stepped Impedance Resonator) type with the width Ws on the short-circuit end side. According to the configuration as shown in FIG. 10, in addition to the effect of the configurations shown in FIGS. 7 to 9, it is possible to expand the region contributing to the input / output coupling while reducing the resonant line length.
【００２２】[0022]
【発明の効果】本発明によれば、高周波用フィルタとし
て利用されるストリップラインフィルタにおいて、入出
力端子が基板裏面に配されるためにフィルタパターンの
面積を小型化できるとともに、入出力結合が容量結合と
なるために入出力端子にＤＣ電圧を印加することが可能
となり、周辺回路のコンデンサ部品数を低減できる。According to the present invention, in a stripline filter used as a high frequency filter, since the input / output terminals are arranged on the back surface of the substrate, the area of the filter pattern can be made small and the input / output coupling can be made capacitive. Since they are coupled, a DC voltage can be applied to the input / output terminals, and the number of capacitor parts in the peripheral circuit can be reduced.
【００２３】さらに、共振線路をＳＩＲ型によって構成
すれば、フィルタパターンの面積をさらに小型化しなが
ら入出力結合に寄与する領域を拡大することができるの
で、フィルタ設計の自由度が増す。Further, if the resonance line is formed of the SIR type, the area contributing to the input / output coupling can be expanded while the area of the filter pattern is further reduced, so that the degree of freedom in filter design is increased.
【図１】本発明第１実施例によるストリップラインフィ
ルタの斜視図である。FIG. 1 is a perspective view of a stripline filter according to a first embodiment of the present invention.
【図２】本発明第１実施例によるストリップラインフィ
ルタの第１の断面図である。FIG. 2 is a first sectional view of a stripline filter according to a first embodiment of the present invention.
【図３】本発明第１実施例によるストリップラインフィ
ルタの第２の断面図である。FIG. 3 is a second sectional view of the stripline filter according to the first embodiment of the present invention.
【図４】本発明第２実施例によるストリップラインフィ
ルタの主面の平面図である。FIG. 4 is a plan view of a main surface of a stripline filter according to a second embodiment of the present invention.
【図５】第２従来例によるストリップラインフィルタの
主面の平面図である。FIG. 5 is a plan view of a main surface of a stripline filter according to a second conventional example.
【図６】第１従来例によるストリップラインフィルタの
主面の平面図である。FIG. 6 is a plan view of a main surface of a stripline filter according to a first conventional example.
【図７】本発明第３実施例によるストリップラインフィ
ルタの分解斜視図である。FIG. 7 is an exploded perspective view of a stripline filter according to a third embodiment of the present invention.
【図８】本発明第３実施例によるストリップラインフィ
ルタの断面図である。FIG. 8 is a sectional view of a stripline filter according to a third embodiment of the present invention.
【図９】本発明第４実施例によるストリップラインフィ
ルタの断面図である。FIG. 9 is a sectional view of a stripline filter according to a fourth embodiment of the present invention.
【図１０】本発明第５実施例によるストリップラインフ
ィルタの分解斜視図である。FIG. 10 is an exploded perspective view of a stripline filter according to a fifth exemplary embodiment of the present invention.
１ 誘電体基板 ２、３、４ 共振線路 ６ 接地導体 ５２、５４ 入出力端子 ６２、６４ 接地導体の切り欠き除去部 1 Dielectric Substrate 2, 3, 4 Resonance Line 6 Ground Conductor 52, 54 Input / Output Terminals 62, 64 Ground Conductor Notch Removal Section
Claims (4)
前記主面の裏側の面に接地導体が配されたストリップラ
インフィルタにおいて、前記接地導体の前記共振線路の
開放端部に対向する部分が切り欠き除去され、該切り欠
き部に前記接地導体から離れて入出力端子が形成されて
いることを特徴とするストリップラインフィルタ。1. A resonance line is arranged on a main surface of a dielectric substrate,
In a stripline filter in which a ground conductor is arranged on a surface on the back side of the main surface, a portion of the ground conductor facing the open end of the resonance line is cut away to separate the ground conductor from the ground conductor. A stripline filter characterized in that input and output terminals are formed.
側の面に接地導体が配された２枚の誘電体基板を、前記
主面の共振線路どうしが接触するように重ね合わせてな
るストリップラインフィルタにおいて、一方の誘電体基
板の前記接地導体の、前記共振線路の開放端部に対向す
る部分が切り欠き除去され、該切り欠き部に前記接地導
体から離れて入出力端子が形成されていることを特徴と
するストリップラインフィルタ。2. A pair of dielectric substrates, each having a resonance line on its main surface and a grounding conductor on the back surface of the main surface, are superposed so that the resonance lines on the main surface are in contact with each other. In the stripline filter, the part of the ground conductor of one of the dielectric substrates facing the open end of the resonance line is cut away, and the cutout part is provided with an input / output terminal apart from the ground conductor. A stripline filter characterized by being formed.
たは厚みが異なることを特徴とする請求項２に記載のス
トリップラインフィルタ。3. The stripline filter according to claim 2, wherein the two dielectric substrates have different permittivities and / or thicknesses.
幅に比べて広いことを特徴とする、請求項１または２ま
たは３に記載のストリップラインフィルタ。4. The stripline filter according to claim 1, wherein the width of each resonance line on the open end side is wider than the width of the short-circuited end side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1256893A JPH06216605A (en) | 1992-11-27 | 1993-01-28 | Stripline filter |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-318382 | 1992-11-27 | ||
| JP31838292 | 1992-11-27 | ||
| JP1256893A JPH06216605A (en) | 1992-11-27 | 1993-01-28 | Stripline filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06216605A true JPH06216605A (en) | 1994-08-05 |
Family
ID=26348197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1256893A Pending JPH06216605A (en) | 1992-11-27 | 1993-01-28 | Stripline filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06216605A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100435809B1 (en) * | 1999-11-12 | 2004-06-12 | 가부시키가이샤 무라타 세이사쿠쇼 | Strip line filter, duplexer, filter device, communication device, and method of adjusting characteristic of strip-line filter |
| EP1612881A2 (en) * | 1999-10-13 | 2006-01-04 | Murata Manufacturing Co., Ltd. | Dielectric filter, dielectric duplexer, and communication apparatus incorporating the same |
| WO2008015899A1 (en) * | 2006-08-02 | 2008-02-07 | Murata Manufacturing Co., Ltd. | Filter element and method for manufacturing filter element |
| US7525401B2 (en) | 2006-09-29 | 2009-04-28 | Tdk Corporation | Stacked filter |
| JP2021515505A (en) * | 2018-06-26 | 2021-06-17 | レイセオン カンパニー | Two-plane tapered line frequency selectivity limiter |
-
1993
- 1993-01-28 JP JP1256893A patent/JPH06216605A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1612881A2 (en) * | 1999-10-13 | 2006-01-04 | Murata Manufacturing Co., Ltd. | Dielectric filter, dielectric duplexer, and communication apparatus incorporating the same |
| EP1612881B1 (en) * | 1999-10-13 | 2009-11-11 | Murata Manufacturing Co., Ltd. | Dielectric filter, dielectric duplexer, and communication apparatus incorporating the same |
| KR100435809B1 (en) * | 1999-11-12 | 2004-06-12 | 가부시키가이샤 무라타 세이사쿠쇼 | Strip line filter, duplexer, filter device, communication device, and method of adjusting characteristic of strip-line filter |
| WO2008015899A1 (en) * | 2006-08-02 | 2008-02-07 | Murata Manufacturing Co., Ltd. | Filter element and method for manufacturing filter element |
| EP1933411A1 (en) * | 2006-08-02 | 2008-06-18 | Murata Manufacturing Co. Ltd. | Filter element and method for manufacturing filter element |
| US7629867B2 (en) | 2006-08-02 | 2009-12-08 | Murata Manufacturing Co., Ltd. | Filter element and method for manufacturing the same |
| JPWO2008015899A1 (en) * | 2006-08-02 | 2009-12-17 | 株式会社村田製作所 | Filter element and method of manufacturing filter element |
| JP4591509B2 (en) * | 2006-08-02 | 2010-12-01 | 株式会社村田製作所 | Filter element and method of manufacturing filter element |
| EP1933411A4 (en) * | 2006-08-02 | 2010-12-15 | Murata Manufacturing Co | Filter element and method for manufacturing filter element |
| US7525401B2 (en) | 2006-09-29 | 2009-04-28 | Tdk Corporation | Stacked filter |
| JP2021515505A (en) * | 2018-06-26 | 2021-06-17 | レイセオン カンパニー | Two-plane tapered line frequency selectivity limiter |
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