JPH05308204A - Adjustment method for attenuation pole for strip line filter - Google Patents
Adjustment method for attenuation pole for strip line filterInfo
- Publication number
- JPH05308204A JPH05308204A JP13986592A JP13986592A JPH05308204A JP H05308204 A JPH05308204 A JP H05308204A JP 13986592 A JP13986592 A JP 13986592A JP 13986592 A JP13986592 A JP 13986592A JP H05308204 A JPH05308204 A JP H05308204A
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- Japan
- Prior art keywords
- conductor
- band
- attenuation
- conductors
- inner shield
- 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、通過帯域の両側におい
て減衰極を生じるストリップラインフィルタの減衰極調
整法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting an attenuation pole of a stripline filter which produces an attenuation pole on both sides of a pass band.
【０００２】[0002]
【従来の技術】受信機などに用いられるストリップライ
ンフィルタは、急峻な選択度特性（shape factorのよい
特性）を有することが要求される。この要求に対処する
手段の一つとして、通過帯域の両側に減衰極を生じさせ
ることにより、急峻な選択度特性を得るようにしたスト
リップラインフィルタがある。2. Description of the Related Art A stripline filter used in a receiver or the like is required to have a steep selectivity characteristic (a characteristic having a good shape factor). As one of the means for coping with this demand, there is a stripline filter in which a steep selectivity characteristic is obtained by producing attenuation poles on both sides of the pass band.
【０００３】この種のストリップラインフィルタは、図
１１に示すように、誘電体基板ａの表面に所要の共振周
波数に応じた長さを有する複数の帯域内共振導体ｂを配
設するとともに、該帯域内共振導体ｂの外側に夫々少な
くとも一つの帯域外共振導体ｃを配設することによっ
て、図１２に示すように通過帯域に対し低域部分あるい
は高域部分に減衰極Ａ，Ｂを生じさせるようにしてい
る。In this type of stripline filter, as shown in FIG. 11, a plurality of in-band resonance conductors b having a length corresponding to a required resonance frequency are arranged on the surface of a dielectric substrate a, and By disposing at least one out-of-band resonant conductor c outside the in-band resonant conductor b, as shown in FIG. 12, attenuation poles A and B are generated in the low band portion or the high band portion with respect to the pass band. I am trying.
【０００４】また、図１３（実公昭６０−７５２５号公
報参照）に示すように、誘電体基板ａの表面に複数の共
振導体ｄを配設するとともに、該共振導体ｄのうち異な
る共振導体ｄ’間に亘って結合導体ｅを配設し、該結合
導体ｅを介して前記両共振導体ｄ’間を磁気結合若しく
は静電結合させることにより、上記と同様に図１２に示
すような減衰極Ａ，Ｂを生じさせるようにしたものもあ
る。Further, as shown in FIG. 13 (see Japanese Utility Model Publication No. 60-7525), a plurality of resonance conductors d are arranged on the surface of a dielectric substrate a, and different resonance conductors d among the resonance conductors d are arranged. By arranging a coupling conductor e between the two resonance conductors and magnetically or electrostatically coupling the two resonance conductors d'through the coupling conductor e, the attenuation pole as shown in FIG. There is also a system in which A and B are generated.
【０００５】[0005]
【発明が解決しようとする課題】上述のように誘電体基
板ａに配設される所定の導体パターンは、スクリーン印
刷などの印刷手段により形成されるものであり、減衰極
Ａ，Ｂの間隔Ｃ（図１２参照）が所定値となるように予
め設定されているため、印刷後において該間隔Ｃを後発
的に調整することができないという欠点がある。The predetermined conductor pattern provided on the dielectric substrate a as described above is formed by a printing means such as screen printing, and the spacing C between the attenuation poles A and B is formed. Since (see FIG. 12) is preset to be a predetermined value, there is a drawback that the interval C cannot be adjusted after printing.
【０００６】また、誘電体基板ａ上に帯域外共振導体ｃ
や結合導体ｅを配設するスペースが必要であるため、そ
れだけ寸法が大きくなる欠点がある。Further, an out-of-band resonance conductor c is formed on the dielectric substrate a.
Since a space for arranging the connection conductor e and the connection conductor e is required, there is a drawback that the size is increased accordingly.
【０００７】本発明は、後発的に減衰極の深度及び間隔
を調整可能とし、且つ、小型化したストリップラインフ
ィルタの提供を目的とするものである。It is an object of the present invention to provide a stripline filter in which the depth and interval of the attenuation poles can be adjusted subsequently and the size is reduced.
【０００８】[0008]
【課題を解決するための手段】本発明は、外表面と側面
に外部シールド導体が形成された一対の誘電体基板の積
層面に、複数の帯状共振導体からなる所定導体パターン
を配設し、該所定導体パターンの各帯状共振導体の一端
を前記側面の外部シールド導体に接続したストリップラ
インフィルタにおいて、積層面の両側縁に側面の外部シ
ールド導体と接続された内部シールド導体を前記帯状共
振導体と平行に形成し、該内部シールド導体を部分的に
削除することによって通過帯或の両側に生ずる低域減衰
極と高域減衰極の深度及び両減衰極の間隔を調整するこ
とを特徴とするものである。According to the present invention, a predetermined conductor pattern composed of a plurality of band-shaped resonant conductors is arranged on a laminated surface of a pair of dielectric substrates having outer shield conductors formed on outer surfaces and side surfaces, In a stripline filter in which one end of each strip-shaped resonance conductor of the predetermined conductor pattern is connected to the outer shield conductor on the side surface, an inner shield conductor connected to the outer shield conductor on the side surface on both side edges of the laminated surface is defined as the strip-shaped resonance conductor. Characterized in that they are formed in parallel and the internal shield conductor is partially removed to adjust the depths of the low-pass attenuation pole and the high-pass attenuation pole and the spacing between both attenuation poles that occur in the pass band or on both sides. Is.
【０００９】[0009]
【作用】積層面の両側縁に形成された内部シールド導体
を部分的に削除することにより通過帯或の両側に減衰極
が生じ、該シールド導体の削除量を増やすほど両減衰極
の間隔が狭くなり、かつ深度が大きくなることが見出さ
れた。そこで、内部シールド導体の削除量を加減するこ
とによって任意の周波数に減衰極を移動させたり、その
深さを変えることが可能となり、所定周波数の通過帯域
波形を後発的に調整することが可能となる。By partially removing the inner shield conductors formed on both edges of the laminated surface, attenuation poles are generated in the pass band or on both sides, and the spacing between the attenuation poles becomes narrower as the amount of the shield conductor removed increases. It has been found that the depth increases. Therefore, it is possible to move the attenuation pole to an arbitrary frequency and change its depth by adjusting the amount of removal of the inner shield conductor, and it is possible to subsequently adjust the passband waveform of a predetermined frequency. Become.
【００１０】[0010]
【実施例】添付図面について、本発明の一実施例を説明
する。本発明に係るストリップラインフィルタは、図１
及び図２に示すように、上下に積層して一体化される一
対の誘電体基板１ａ，１ｂからなる。各誘電体基板１
ａ，１ｂは矩形をなす誘電体セラミックからなり、その
外表面及び側面には外部シールド導体５ａ，５ｂが夫々
形成される。一方の誘電体基板１ａの積層面９（両誘電
体基板１ａ，１ｂを積層した状態における内表面）には
所定の共振周波数に応じた長さを有する複数の帯状共振
導体２が形成され、各帯状共振導体２の一端は前記側面
の外部シールド導体５ａに接続される。また、この各帯
状共振導体２からなる所定導体パターンの両最外位置の
帯状共振導体２から側面側へそれぞれ入出力用導電枝
７，７が延成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the accompanying drawings. The stripline filter according to the present invention is shown in FIG.
Also, as shown in FIG. 2, it is composed of a pair of dielectric substrates 1a and 1b which are vertically stacked and integrated. Each dielectric substrate 1
Each of a and 1b is made of a rectangular dielectric ceramic, and outer shield conductors 5a and 5b are formed on the outer surface and side surfaces thereof, respectively. A plurality of strip-shaped resonance conductors 2 having a length corresponding to a predetermined resonance frequency are formed on the laminated surface 9 of one dielectric substrate 1a (the inner surface in a state where both dielectric substrates 1a and 1b are laminated). One end of the band-shaped resonance conductor 2 is connected to the outer shield conductor 5a on the side surface. Further, the input / output conductive branches 7, 7 are respectively extended from the outermost band-shaped resonance conductors 2 at the outermost positions of the predetermined conductor pattern formed of the respective band-shaped resonance conductors 2 to the side surface side.
【００１１】また、誘電体基板１ａの積層面９には、前
記帯状共振導体２と平行な両側縁に沿って内部シールド
導体８Ｒ，８Ｌが形成される。該内部シールド導体８
Ｒ，８Ｌは前記入出力用導電枝７，７の延成部分を除い
て配設され、その外側縁は前記側面の外部シールド導体
５ａに夫々接続される。On the laminated surface 9 of the dielectric substrate 1a, inner shield conductors 8R and 8L are formed along both side edges parallel to the band-shaped resonance conductor 2. The inner shield conductor 8
R and 8L are arranged excluding the extending portions of the input / output conductive branches 7 and 7, and the outer edges thereof are connected to the outer shield conductor 5a on the side surface, respectively.
【００１２】誘電体基板１ａの外表面には、前記入出力
用導電枝７，７に表裏で対応する位置に入出力端子３，
３が設けられ、また、その側面には該入出力端子３，３
に対応させて接続路１０，１０が設けられる。該接続路
１０，１０と入出力端子３，３はその周囲を囲繞する絶
縁部４，４により外部シールド導体５ａと電気的に離隔
されている。そして前記帯状共振導体２に入出力用導電
枝７，７及び接続路１０，１０を介して入出力端子３，
３を接続させ、該入出力端子３，３によって外部電路と
の電気的接続を可能としている。On the outer surface of the dielectric substrate 1a, the input / output terminals 3, 7 are provided at positions corresponding to the input / output conductive branches 7, 7 on the front and back sides.
3 is provided, and the input / output terminals 3 and 3 are provided on the side surface thereof.
The connection paths 10 and 10 are provided corresponding to the above. The connection paths 10 and 10 and the input / output terminals 3 and 3 are electrically separated from the outer shield conductor 5a by the insulating portions 4 and 4 surrounding the connection paths 10 and 10. The input / output terminals 3, 3 are connected to the band-shaped resonance conductor 2 via the input / output conductive branches 7, 7 and the connecting paths 10, 10.
3 is connected, and the input / output terminals 3 and 3 enable electrical connection with an external electric circuit.
【００１３】また、前記誘電体基板１ａ，１ｂのうち、
他方の誘電体基板１ｂの積層面９には、上述した誘電体
基板１ａの各帯状共振導体２からなる所定導体パターン
及び内部シールド導体８Ｒ，８Ｌと鏡像関係となる所定
導体パターンと内部シールド導体が夫々形成され、積層
状態で互いに密着するようにしている。また、誘電体基
板１ｂの側面には、前記絶縁部４，４に対応させて絶縁
部６，６が形成され、該絶縁部６，６によって入出力用
導電枝７，７と外部シールド導体５ｂとの絶縁を確保し
ている。尚、誘電体基板１ｂの積層面９の前記所定パタ
ーを省略し、誘電体基板１ａの各帯状共振導体２からな
る所定導体パターンと内部シールド導体８Ｒ，８Ｌのみ
で、所要の濾波作用を生じさせるようにしても良い。Of the dielectric substrates 1a and 1b,
On the laminated surface 9 of the other dielectric substrate 1b, a predetermined conductor pattern formed of each band-shaped resonant conductor 2 of the above-described dielectric substrate 1a and a predetermined conductor pattern and an inner shield conductor that are in a mirror image relationship with the inner shield conductors 8R and 8L. Each is formed so as to be in close contact with each other in a laminated state. Insulating portions 6 and 6 are formed on the side surfaces of the dielectric substrate 1b so as to correspond to the insulating portions 4 and 4, and the insulating portions 6 and 6 provide input / output conductive branches 7 and 7 and an external shield conductor 5b. The insulation with is secured. It should be noted that the predetermined pattern on the laminated surface 9 of the dielectric substrate 1b is omitted, and a predetermined filtering action is generated only by the predetermined conductor pattern formed by the respective band-shaped resonant conductors 2 of the dielectric substrate 1a and the internal shield conductors 8R and 8L. You may do it.
【００１４】そして、かかる構成から成る誘電体基板１
ａ，１ｂを積層して一体化するのであるが、これに先立
ち選択度特性の調整が行なわれる。即ち、スクリーン印
刷等の手段で導電層を塗着することにより形成される各
導体にあって、内部シールド導体８Ｒ，８Ｌを部分的に
削除することによって選択度特性を変化させることがで
きる。The dielectric substrate 1 having the above structure
Although a and 1b are laminated and integrated, the selectivity characteristic is adjusted prior to this. That is, the selectivity characteristic can be changed by partially deleting the inner shield conductors 8R and 8L in each conductor formed by applying a conductive layer by means of screen printing or the like.
【００１５】図３乃至図１０は本発明における内部シー
ルド導体８Ｒ，８Ｌの削除量と選択度特性の変化の関係
を表わす図であり、図３に示すように内部シールド導体
８Ｒ，８Ｌを全く削除しない場合には、図４に示すよう
に通過帯或に減衰極のない選択度特性を有するが、図５
に示すように内部シールド導体８Ｒ，８Ｌを略２分の１
まで削除すると、図６に示すように通過帯或の両側の低
域部分及び高域部分に減衰極Ａ，Ｂが生じる。そして更
に内部シールド導体８Ｒ，８Ｌを図７に示すように略４
分の１まで削除すると、図８に示すように、図６におけ
る減衰極Ａ，Ｂの間隔Ｃが次第に狭くなっていき、内部
シールド導体８Ｒ，８Ｌを図９に示すように全て削除す
ると、図１０に示すように減衰極Ａ，Ｂの間隔Ｃを最も
狭くすることができる。FIGS. 3 to 10 are views showing the relationship between the removal amount of the inner shield conductors 8R and 8L and the change of the selectivity characteristic in the present invention. As shown in FIG. 3, the inner shield conductors 8R and 8L are completely removed. If it does not, it has selectivity characteristics without a pass band or attenuation pole as shown in FIG.
As shown in, the inner shield conductors 8R and 8L are approximately halved.
If it is deleted, attenuation poles A and B are generated in the low band part and the high band part on both sides of the pass band as shown in FIG. Further, as shown in FIG. 7, the inner shield conductors 8R and 8L are further separated by approximately 4
If it is deleted up to one part, as shown in FIG. 8, the distance C between the attenuation poles A and B in FIG. 6 becomes gradually narrower, and if all the inner shield conductors 8R and 8L are deleted as shown in FIG. As shown in 10, the distance C between the attenuation poles A and B can be minimized.
【００１６】したがって、このように内部シールド導体
８Ｒ，８Ｌの削除量によって減衰極Ａ，Ｂの間隔Ｃ及び
深度を任意に調整することができるため、両減衰極Ａ，
Ｂを所定周波数の通過帯域に近づけて急峻な選択度特性
を得ることができる。このことは当然ながら、コムライ
ン構造のフィルタにおいても同一の作用を得る。Therefore, since the distance C and the depth between the attenuation poles A and B can be arbitrarily adjusted by the removal amount of the inner shield conductors 8R and 8L as described above, both attenuation poles A and B can be adjusted.
B can be brought close to the pass band of a predetermined frequency to obtain a steep selectivity characteristic. As a matter of course, the same effect can be obtained in the filter having the comb line structure.
【００１７】尚、図９に示すように内部シールド導体８
Ｒ，８Ｌを全て削除すると、図１０に示すように減衰極
Ａ，Ｂの間隔Ｃが最も狭くなるが、該減衰極Ａ，Ｂを挟
む低域側及び高域側の通過帯域の減衰量が増加する不具
合が生じるため、図８に示すような選択度特性波形が得
られるように減衰極Ａ，Ｂの間隔Ｃを調整することが好
ましい。As shown in FIG. 9, the inner shield conductor 8
When R and 8L are all deleted, the distance C between the attenuation poles A and B becomes the narrowest as shown in FIG. 10, but the attenuation amounts of the low-pass side and the high-pass side sandwiching the attenuation poles A and B are reduced. Since there is a problem of increase, it is preferable to adjust the distance C between the attenuation poles A and B so that the selectivity characteristic waveform as shown in FIG. 8 is obtained.
【００１８】[0018]
【発明の効果】本発明は上述のように、帯状共振導体と
平行な積層面の両側縁に内部シールド導体を形成し、該
内部シールド導体を部分的に削除するようにしたから、
減衰域の低域部分と高域部分に減衰極を生じさせること
ができるととともに、該内部シールド導体の削除量によ
って両減衰極の間隔及び深度を後発的に調整することが
できる。このため、所定周波数の通過帯域の波形を正確
に調整することができる優れた効果がある。As described above, according to the present invention, the inner shield conductor is formed on both side edges of the laminated surface parallel to the band-shaped resonance conductor, and the inner shield conductor is partially deleted.
Attenuation poles can be generated in the low-frequency part and the high-frequency part of the attenuation region, and the distance and depth of both attenuation poles can be adjusted later by the amount of elimination of the inner shield conductor. Therefore, there is an excellent effect that the waveform of the pass band of the predetermined frequency can be adjusted accurately.
【００１９】また、従来のように誘電体基板上に帯域外
共振導体や結合導体を配設するスペースを確保する必要
がないので、寸法を小型化することが可能である。Further, since it is not necessary to secure a space for disposing the out-of-band resonance conductor or the coupling conductor on the dielectric substrate as in the conventional case, the size can be reduced.
【図１】本発明にかかるストリップラインフィルタの一
実施例を表わす分離斜視図である。FIG. 1 is an exploded perspective view showing an embodiment of a stripline filter according to the present invention.
【図２】一方の誘電体基板１ａの裏面図である。FIG. 2 is a back view of one dielectric substrate 1a.
【図３】内部シールド導体を削除していない誘電体基板
の平面図である。FIG. 3 is a plan view of a dielectric substrate in which an inner shield conductor is not removed.
【図４】図３における選択度特性図である。FIG. 4 is a selectivity characteristic diagram in FIG.
【図５】内部シールド導体を２分の１削除した誘電体基
板の平面図である。FIG. 5 is a plan view of a dielectric substrate from which an inner shield conductor has been removed by half.
【図６】図５における選択度特性図である。FIG. 6 is a selectivity characteristic diagram in FIG.
【図７】内部シールド導体を４分の１削除した誘電体基
板の平面図である。FIG. 7 is a plan view of a dielectric substrate in which an inner shield conductor is deleted by a quarter.
【図８】図７における選択度特性図である。8 is a selectivity characteristic diagram of FIG. 7.
【図９】内部シールド導体を全て削除した誘電体基板の
平面図である。FIG. 9 is a plan view of a dielectric substrate from which all inner shield conductors have been deleted.
【図１０】図９における選択度特性図である。FIG. 10 is a selectivity characteristic diagram in FIG.
【図１１】従来のストリップラインフィルタの平面図で
ある。FIG. 11 is a plan view of a conventional stripline filter.
【図１２】従来のストリップラインフィルタの選択度特
性図である。FIG. 12 is a selectivity characteristic diagram of a conventional stripline filter.
【図１３】従来の他のストリップラインフィルタの平面
図である。FIG. 13 is a plan view of another conventional stripline filter.
１ａ，１ｂ 誘電体基板 ２ 共振導体 ３ 入出力端子 ４ 絶縁部 ５ａ，５ｂ 外部シールド導体 ６ 絶縁部 ７，７ 入出力用導電枝 ８Ｒ，８Ｌ 内部シールド導体 ９ 積層面 1a, 1b Dielectric substrate 2 Resonance conductor 3 Input / output terminal 4 Insulation part 5a, 5b External shield conductor 6 Insulation part 7,7 Input / output conductive branch 8R, 8L Internal shield conductor 9 Laminated surface
Claims (1)
された一対の誘電体基板の積層面に、複数の帯状共振導
体からなる所定導体パターンを配設し、該所定導体パタ
ーンの各帯状共振導体の一端を前記側面の外部シールド
導体に接続したストリップラインフィルタにおいて、 積層面の両側縁に側面の外部シールド導体と接続された
内部シールド導体を前記帯状共振導体と平行に形成し、
該内部シールド導体を部分的に削除することによって通
過帯或の両側に生ずる低域減衰極と高域減衰極の深度及
び両減衰極の間隔を調整することを特徴とするストリッ
プラインフィルタの減衰極調整法。1. A predetermined conductor pattern composed of a plurality of band-shaped resonance conductors is arranged on a laminated surface of a pair of dielectric substrates having outer shield conductors formed on the outer surface and side surfaces, and each band-shaped resonance of the predetermined conductor pattern. In a stripline filter in which one end of a conductor is connected to the outer shield conductor on the side surface, inner shield conductors connected to the outer shield conductor on the side surface are formed parallel to the strip-shaped resonance conductor on both side edges of the laminated surface,
An attenuation pole of a stripline filter, characterized in that the depth of a low-pass attenuation pole and a high-pass attenuation pole, which are generated on both sides of a pass band, and the distance between both attenuation poles are adjusted by partially deleting the inner shield conductor. Adjustment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13986592A JPH05308204A (en) | 1992-04-30 | 1992-04-30 | Adjustment method for attenuation pole for strip line filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13986592A JPH05308204A (en) | 1992-04-30 | 1992-04-30 | Adjustment method for attenuation pole for strip line filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05308204A true JPH05308204A (en) | 1993-11-19 |
Family
ID=15255353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13986592A Pending JPH05308204A (en) | 1992-04-30 | 1992-04-30 | Adjustment method for attenuation pole for strip line filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05308204A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1328039A2 (en) * | 2002-01-09 | 2003-07-16 | Broadcom Corporation | Printed bandpass filter for a double conversion tuner |
| EP1329977A1 (en) * | 2002-01-17 | 2003-07-23 | Paratek Microwave, Inc. | Electronically tunable combline filter with asymmetric response |
| KR101247673B1 (en) * | 2011-06-27 | 2013-04-01 | 강인호 | A Miniaturized Band-pass Filter Using the Reduced λ/4 Transmission Line |
-
1992
- 1992-04-30 JP JP13986592A patent/JPH05308204A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1328039A2 (en) * | 2002-01-09 | 2003-07-16 | Broadcom Corporation | Printed bandpass filter for a double conversion tuner |
| EP1328039A3 (en) * | 2002-01-09 | 2004-02-25 | Broadcom Corporation | Printed bandpass filter for a double conversion tuner |
| US7071798B2 (en) | 2002-01-09 | 2006-07-04 | Broadcom Corporation | Printed bandpass filter for a double conversion tuner |
| US7084720B2 (en) | 2002-01-09 | 2006-08-01 | Broadcom Corporation | Printed bandpass filter for a double conversion tuner |
| US7375604B2 (en) | 2002-01-09 | 2008-05-20 | Broadcom Corporation | Compact bandpass filter for double conversion tuner |
| US7567153B2 (en) | 2002-01-09 | 2009-07-28 | Broadcom Corporation | Compact bandpass filter for double conversion tuner |
| EP1329977A1 (en) * | 2002-01-17 | 2003-07-23 | Paratek Microwave, Inc. | Electronically tunable combline filter with asymmetric response |
| KR101247673B1 (en) * | 2011-06-27 | 2013-04-01 | 강인호 | A Miniaturized Band-pass Filter Using the Reduced λ/4 Transmission Line |
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