JPH0731604Y2 - Dielectric filter - Google Patents
Dielectric filterInfo
- Publication number
- JPH0731604Y2 JPH0731604Y2 JP1988137994U JP13799488U JPH0731604Y2 JP H0731604 Y2 JPH0731604 Y2 JP H0731604Y2 JP 1988137994 U JP1988137994 U JP 1988137994U JP 13799488 U JP13799488 U JP 13799488U JP H0731604 Y2 JPH0731604 Y2 JP H0731604Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- coupling
- dielectric
- insulating plate
- filter
- 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 - Lifetime
Links
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、移動通信システム（自動車電話、携帯電話、
コードレス電話等）や衛星通信システムに使用されるマ
イクロ波帯の誘電体フィルタに係り、とくに誘電体共振
子と外部段間結合手段とを組み合わせた誘電体フィルタ
に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a mobile communication system (car phone, mobile phone,
The present invention relates to a microwave band dielectric filter used for cordless telephones and satellite communication systems, and more particularly to a dielectric filter in which a dielectric resonator and an external interstage coupling means are combined.
（考案の概要） 本考案は、マイクロ波通信機器用の誘電体フィルタにお
いて、誘電体共振子と外部段間結合手段とを組み合わせ
た構成を備え、その外部段間結合手段の一部にインダン
タンス結合を組み入れて高調波に対する減衰特性を改善
したものである。(Summary of the Invention) The present invention provides a dielectric filter for a microwave communication device, which has a structure in which a dielectric resonator and an external inter-stage coupling means are combined, and the external inter-stage coupling means has a part of the inductance. By incorporating coupling, the attenuation characteristic for higher harmonics is improved.
（従来の技術） 静電容量のみによる外部段間結合手段を用いた誘電体フ
ィルタは実開昭60-112104号等で既に公知である。(Prior Art) A dielectric filter using an external inter-stage coupling means based only on electrostatic capacitance is already known in Japanese Utility Model Publication No. 60-112104.
第７図に静電容量のみによる外部段間結合手段を用いた
従来の誘電体フィルタの１例を示す。この図において、
アルミナ等の絶縁板１の片面には厚膜印刷等によって結
合用電極2A,2B,2C,2Dが交互に形成されている。そし
て、各結合用電極2A,2B,2C,2Dの端縁は相互に近接して
段間結合用静電容量を構成するようになっている。さら
に、絶縁板１の両端部には、入出力端子５に接続される
入出力用電極３が厚膜印刷等によって形成され、両端に
位置する結合用電極2A,2Dに近接して入出力結合用静電
容量を構成している。そして、各結合用電極2A,2B,2C,2
Dの下端に同軸円筒型の誘電体共振子４が所定長の接続
線路を介してはんだ付け等で接続される。ここで、誘電
体共振子４は、円筒状誘電体の外周面と内周面と下端面
とに導体膜を形成し、上端面のみ誘電体が露出した開放
端面となっているものである。FIG. 7 shows an example of a conventional dielectric filter using an external interstage coupling means based only on capacitance. In this figure,
Coupling electrodes 2A, 2B, 2C and 2D are alternately formed on one surface of an insulating plate 1 made of alumina or the like by thick film printing or the like. The edges of each coupling electrode 2A, 2B, 2C, 2D are arranged close to each other to form an inter-stage coupling capacitance. Further, the input / output electrodes 3 connected to the input / output terminals 5 are formed at both ends of the insulating plate 1 by thick film printing or the like, and the input / output couplings are made close to the coupling electrodes 2A, 2D located at the both ends. It constitutes the capacitance for use. Then, each coupling electrode 2A, 2B, 2C, 2
A coaxial cylindrical dielectric resonator 4 is connected to the lower end of D by soldering or the like via a connection line having a predetermined length. Here, the dielectric resonator 4 has a conductor film formed on the outer peripheral surface, the inner peripheral surface, and the lower end surface of a cylindrical dielectric body, and has an open end surface in which only the upper end surface is exposed.
（考案が解決しようとする課題） ところで、第７図の静電容量のみによる外部段間結合手
段を用いた従来の誘電体フィルタでは、高調波、とくに
誘電体フィルタ本来の共振周波数である基本波の３倍高
調波を除去出来ず、誘電体フィルタとは別個にローパス
フィルタやノッチフィルタを付加して高調波の除去を行
う必要性があった。このため、装置全体が大型化、複雑
化する嫌いがあり、ローパスフィルタやノッチフィルタ
を付加する組立工程が必要になって、コストアップにな
る。(Problems to be Solved by the Invention) By the way, in the conventional dielectric filter using the external inter-stage coupling means based on only the electrostatic capacitance shown in FIG. 7, harmonics, especially the fundamental wave which is the original resonant frequency of the dielectric filter is used. However, it was necessary to add a low-pass filter or a notch filter separately from the dielectric filter to remove the third harmonic wave. For this reason, there is a tendency that the entire apparatus becomes large and complicated, and an assembling process for adding a low-pass filter or a notch filter is required, resulting in an increase in cost.
本考案は、上記の点に鑑み、別個にローパスフィルタや
ノッチフィルタを設けなくとも高調波成分の除去、抑制
が可能な誘電体フィルタを提供することを目的とする。In view of the above points, an object of the present invention is to provide a dielectric filter capable of removing and suppressing harmonic components without separately providing a low pass filter or a notch filter.
（課題を解決するための手段） 上記目的達成のため、本考案の誘電体フィルタは、１個
の貫通導電部を有する誘電体共振子の複数個又は複数個
の貫通導電部を有する誘電体共振子の各貫通導電部の開
放端を、絶縁板上にそれぞれ設けられた電極に接続し、
各貫通導電部にそれぞれ接続された電極のうち、一部の
隣合う電極同士を段間インダクタンス結合のためのイン
ダクタで接続し、その他の隣合う電極同士は静電容量結
合とした構成としている。(Means for Solving the Problems) In order to achieve the above object, a dielectric filter of the present invention has a plurality of dielectric resonators having one through conductive portion or a dielectric resonator having a plurality of through conductive portions. The open end of each through conductive part of the child is connected to the electrodes respectively provided on the insulating plate,
Among the electrodes respectively connected to the penetrating conductive portions, some adjacent electrodes are connected by an inductor for inter-stage inductance coupling, and the other adjacent electrodes are capacitively coupled.
（作用） 本考案の誘電体フィルタにおいては、絶縁板及び該絶縁
板上の電極からなる外部段間結合手段の一部にインダク
タンス結合を組み入れており、高調波成分を相当除去、
抑制でき、ローパスフィルタやノッチフィルタを別個に
設ける必要性を無くすことができる。このため、装置全
体の部品点数を削減し、これにともなう組立工数も減ら
し、さらには小型化、原価低減を図ることができる。(Function) In the dielectric filter of the present invention, the inductance coupling is incorporated in a part of the external inter-stage coupling means composed of the insulating plate and the electrodes on the insulating plate, and the harmonic components are considerably removed.
It can be suppressed and the necessity of separately providing a low pass filter and a notch filter can be eliminated. Therefore, the number of parts of the entire apparatus can be reduced, the number of assembling steps associated therewith can be reduced, and further downsizing and cost reduction can be achieved.
（実施例） 以下、本考案に係る誘電体フィルタの実施例を図面に従
って説明する。(Embodiment) An embodiment of the dielectric filter according to the present invention will be described below with reference to the drawings.
第１図は本考案の第１実施例の構造を、第２図はその等
価回路を示す。これらの図において、アルミナ等の絶縁
板１の片面には厚膜印刷等によって結合用電極2E,2F,2
G,2Hが形成されている。そして、各結合用電極2Eと2F同
士、2Gと2H同士の端縁は相互に近接して段間結合用静電
容量C0を構成するようになっている。また、電極2F,2G
間はジグザグ状の導体膜パターンによるインダクタ10で
接続されている。すなわち、電極2F,2Gはインダクタン
スL0で接続されたインダンタンス結合（誘導結合）とな
っている。さらに、絶縁板１の両端部には、入出力端子
５に接続される入出力用電極３が厚膜印刷等によって形
成され、両端に位置する結合用電極2E,2Hに近接して入
出力結合用静電容量C1を構成している。なお、インダク
タ10も各電極と同様に厚膜印刷等で同時に形成できる。FIG. 1 shows the structure of the first embodiment of the present invention, and FIG. 2 shows its equivalent circuit. In these figures, one side of the insulating plate 1 made of alumina or the like is provided with coupling electrodes 2E, 2F, 2 by thick film printing or the like.
G, 2H is formed. The edges of the coupling electrodes 2E and 2F, and the edges of 2G and 2H are close to each other to form an interstage coupling capacitance C 0 . Also, electrodes 2F, 2G
The gaps are connected by an inductor 10 having a zigzag conductor film pattern. That is, the electrodes 2F and 2G are inductive coupling (inductive coupling) connected by the inductance L 0 . Further, input / output electrodes 3 connected to the input / output terminals 5 are formed on both ends of the insulating plate 1 by thick film printing or the like, and the input / output couplings are made close to the coupling electrodes 2E, 2H located at both ends. It constitutes the capacitance C 1 for. In addition, the inductor 10 can be simultaneously formed by thick film printing or the like similarly to the electrodes.
外部段間結合手段は、絶縁板１上の上記各電極2E乃至2H
及びインダクタ10で構成されることになる。The external inter-stage coupling means is the electrodes 2E to 2H on the insulating plate 1.
And the inductor 10.
そして、各結合用電極2E,2F,2G,2Hの下端に誘電体共振
子４が所定長の接続線路を介してはんだ付け等で接続さ
れる。ここで、誘電体共振子４は、円筒状誘電体11の外
周面と内周面と下端面とに導体膜12を形成し、上端面の
み誘電体11が露出した開放端面（但し、開放端面の一部
にも導体膜12を設ける場合もある）となっているもので
ある。すなわち、各々の誘電体共振子４が円筒状誘電体
11の内周面の導体膜12からなる１個の貫通導電部を有
し、各貫通導電部の開放端が各電極2E,2F,2G,2Hにそれ
ぞれ接続されている。Then, the dielectric resonator 4 is connected to the lower ends of the coupling electrodes 2E, 2F, 2G, 2H by soldering or the like via a connection line of a predetermined length. Here, in the dielectric resonator 4, the conductor film 12 is formed on the outer peripheral surface, the inner peripheral surface, and the lower end surface of the cylindrical dielectric body 11, and the open end surface (however, the open end surface where the dielectric body 11 is exposed is formed only on the upper end surface. There is a case where the conductor film 12 is also provided on a part of the above). That is, each dielectric resonator 4 is a cylindrical dielectric
There is one penetrating conductive part made of the conductor film 12 on the inner peripheral surface of 11, and the open end of each penetrating conductive part is connected to each electrode 2E, 2F, 2G, 2H.
第３図は上記第１実施例の場合の減衰量の周波数特性を
従来の第７図の場合と比較して示したものである。図
中、実線Ｘは従来の場合、点線Ｙは第１実施例の場合の
減衰特性である。この図から、従来の場合には第３高調
波についての減衰が殆ど得られないのに対し、第１実施
例の場合には第３高調波を実質的に除去できていること
が判る。FIG. 3 shows the frequency characteristic of the attenuation amount in the case of the first embodiment as compared with the conventional case of FIG. In the figure, the solid line X is the attenuation characteristic in the conventional case, and the dotted line Y is the attenuation characteristic in the first embodiment. From this figure, it can be seen that the third harmonic can be substantially removed in the case of the first embodiment, while the attenuation of the third harmonic is hardly obtained in the conventional case.
上記第１実施例によれば、静電容量による外部段間結合
手段の一部にインダクタ10によるインダクタンス結合を
設けたので、高調波を充分除去、抑制でき、別個にロー
パスフィルタやノッチフィルタを設ける必要が無くな
り、部品点数の削減や小型化が可能になる。また、イン
ダクタ10は導体膜パターンで各電極2E乃至2H,3と同時に
形成でき、製造工程の簡素化を図り得る。According to the first embodiment described above, since the inductance coupling by the inductor 10 is provided in a part of the external inter-stage coupling means by electrostatic capacitance, harmonics can be sufficiently removed and suppressed, and the low pass filter and the notch filter are separately provided. There is no need, and the number of parts can be reduced and the size can be reduced. In addition, the inductor 10 can be formed simultaneously with the electrodes 2E to 2H, 3 in a conductor film pattern, and the manufacturing process can be simplified.
第４図は本考案の第２実施例を示す。この図において、
絶縁板１の片面には厚膜印刷等によって結合用電極2I,2
J,2K,2L,2M,2Nが形成されている。そして、各結合用電
極2J,2K,2L,2M同士の端縁は相互に近接して段間結合用
静電容量を構成するようになっている。また、第５図に
示す如く電極2I,2J間には銅線等の空芯コイル20がはん
だ付け等で接続され、同様に電極2M,2N間も空芯コイル2
0で接続され、電極2I,2J間及び電極2M,2N間はインダン
タンス結合（誘導結合）となっている。さらに、絶縁板
１の両端部には、入出力端子５に接続される入出力用電
極３が厚膜印刷等によって形成され、両端に位置する結
合用電極2I,2Nに近接して入出力結合用静電容量を構成
している。FIG. 4 shows a second embodiment of the present invention. In this figure,
On one side of the insulating plate 1, by means of thick film printing or the like, coupling electrodes 2I, 2
J, 2K, 2L, 2M and 2N are formed. The edges of the coupling electrodes 2J, 2K, 2L, 2M are arranged close to each other to form inter-stage coupling capacitance. Further, as shown in FIG. 5, an air-core coil 20 such as a copper wire is connected between the electrodes 2I and 2J by soldering, and similarly, the air-core coil 2 is also connected between the electrodes 2M and 2N.
The electrodes are connected at 0, and the electrodes 2I and 2J and the electrodes 2M and 2N are inductively coupled. Further, the input / output electrodes 3 connected to the input / output terminals 5 are formed on both ends of the insulating plate 1 by thick film printing or the like, and the input / output couplings are made close to the coupling electrodes 2I and 2N located at both ends. It constitutes the capacitance for use.
そして、各結合用電極2I乃至2Nに誘電体共振子４が所定
長の接続線路を介してはんだ付け等で接続される。Then, the dielectric resonator 4 is connected to each of the coupling electrodes 2I to 2N by soldering or the like via a connection line having a predetermined length.
第６図は本考案の第３実施例を示す。この場合、同軸円
筒型の誘電体共振子の代わりに、直方体状の誘電体ブロ
ック35に複数の貫通導電部31を並設し、少なくとも誘電
体ブロックの４側面と底面（短絡端面）とに導体膜32を
形成した誘電体共振子30を用いている。そして、この誘
電体共振子30はそれ自体では段間結合のための手段をと
くに設けず、第２実施例に示したような外部段間結合手
段と組み合わせている。すなわち、絶縁板１の片面には
厚膜印刷等によって結合用電極2P,2Q,2R,2S,2Tが形成さ
れている。そして、各結合用電極2Q,2R,2S同士の端縁は
相互に近接して段間結合用静電容量を構成し、電極2P,2
Q間と2S,2T間は銅線等の空芯コイル20で接続されてイン
ダンタンス結合（誘導結合）となっている。さらに、絶
縁板１の両端部には、入出力端子５に接続される入出力
用電極３が厚膜印刷等によって形成され、両端に位置す
る結合用電極2P,2Tに近接して入出力結合用静電容量を
構成している。FIG. 6 shows a third embodiment of the present invention. In this case, instead of the coaxial cylindrical dielectric resonator, a plurality of penetrating conductive portions 31 are arranged in parallel in a rectangular parallelepiped dielectric block 35, and conductors are provided at least on four side surfaces and a bottom surface (short-circuited end surface) of the dielectric block. The dielectric resonator 30 having the film 32 is used. The dielectric resonator 30 itself is not provided with any means for interstage coupling, but is combined with the external interstage coupling means as shown in the second embodiment. That is, the coupling electrodes 2P, 2Q, 2R, 2S, 2T are formed on one surface of the insulating plate 1 by thick film printing or the like. The edges of the coupling electrodes 2Q, 2R, 2S are close to each other to form inter-stage coupling capacitance, and the electrodes 2P, 2
Between Q and between 2S and 2T are connected by an air core coil 20 such as a copper wire to form an inductance coupling (inductive coupling). Further, the input / output electrodes 3 connected to the input / output terminals 5 are formed on both ends of the insulating plate 1 by thick film printing or the like, and the input / output couplings are made close to the coupling electrodes 2P and 2T located at both ends. It constitutes the capacitance for use.
そして、各結合用電極2P乃至2Tに誘電体共振子30の各貫
通導電部31の開放端が所定長の接続線路を介してはんだ
付け等で接続される。Then, the open ends of the through conductive portions 31 of the dielectric resonator 30 are connected to the coupling electrodes 2P to 2T by soldering or the like via a connection line of a predetermined length.
なお、絶縁板１は共振子30の上面（開放端面）に平行も
しくは重ねて配置してもよい。It should be noted that the insulating plate 1 may be arranged in parallel with or overlaid on the upper surface (open end surface) of the resonator 30.
本考案は３段以上の多段フィルタや、送受共用フィルタ
に適用できる。また、インダクタンス結合は、導体膜パ
ターンによるインダクタや空芯コイルの他に、チップイ
ンダクタを絶縁板に貼り付け電極間に接続する構成とし
てもよい。INDUSTRIAL APPLICABILITY The present invention can be applied to a multi-stage filter having three or more stages and a common filter for transmission and reception. Further, the inductance coupling may be configured by attaching a chip inductor to an insulating plate and connecting between electrodes, in addition to the inductor and the air core coil by the conductor film pattern.
（考案の効果） 以上説明したように、本考案の誘電体フィルタは、外部
段間結合手段の一部にインダンタンス結合を組み入れた
構成としたので、高調波成分を除去、抑圧でき、従来必
要であったローパスフィルタやノッチフィルタを省略す
ることができる。このため、部品点数の削減、小型化、
組立工程の簡素化、原価低減が可能となる。(Effect of the Invention) As described above, since the dielectric filter of the present invention has the structure in which the inductance coupling is incorporated in a part of the external inter-stage coupling means, it is possible to remove and suppress the harmonic components, which is conventionally required. It is possible to omit the low pass filter and the notch filter that used to be. Therefore, the number of parts is reduced, the size is reduced,
It is possible to simplify the assembly process and reduce costs.
第１図は本考案に係る誘電体フィルタの第１実施例であ
って一部を断面とした正面図、第２図は第１実施例の場
合の等価回路図、第３図は第１実施例と従来の誘電体フ
ィルタの減衰特性を比較して示すグラフ、第４図は本考
案の第２実施例の正面図、第５図は第２実施例の要部を
示す斜視図、第６図は本考案の第３実施例であって一部
を断面とした正面図、第７図は従来の誘電体フィルタの
正面図である。 １……絶縁板、2A乃至2T……結合用電極、4,30……誘電
体共振子、10……インダクタ、20……空芯コイル。FIG. 1 is a front view of a first embodiment of a dielectric filter according to the present invention with a part in section, FIG. 2 is an equivalent circuit diagram in the case of the first embodiment, and FIG. 3 is a first embodiment. FIG. 4 is a graph showing the attenuation characteristics of an example and a conventional dielectric filter in comparison, FIG. 4 is a front view of a second embodiment of the present invention, and FIG. 5 is a perspective view showing the essential parts of the second embodiment. FIG. 7 is a front view of a third embodiment of the present invention with a part in section, and FIG. 7 is a front view of a conventional dielectric filter. 1 ... Insulating plate, 2A to 2T ... Coupling electrode, 4,30 ... Dielectric resonator, 10 ... Inductor, 20 ... Air core coil.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 遠藤 謙二 東京都中央区日本橋１丁目13番１号 ティ ーディーケイ株式会社内 (56)参考文献 特開 昭63−206016（ＪＰ，Ａ) 実開 昭62−68308（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenji Endo, 13-13-1 Nihonbashi, Chuo-ku, Tokyo TDC Corporation (56) References JP 63-206016 (JP, A) -68308 (JP, U)
Claims (2)
複数個又は複数個の貫通導電部を有する誘電体共振子の
各貫通導電部の開放端を、絶縁板上にそれぞれ設けられ
た電極に接続し、各貫通導電部にそれぞれ接続された電
極のうち、一部の隣合う電極同士を段間インダクタンス
結合のためのインダクタで接続し、その他の隣合う電極
同士は静電容量結合としたことを特徴とする誘電体フィ
ルタ。1. An open end of a plurality of dielectric resonators having one through conductive part or an open end of each through conductive part of a dielectric resonator having a plurality of through conductive parts is provided on an insulating plate. Of the electrodes connected to each of the through conductive parts, some of the adjacent electrodes are connected by an inductor for interstage inductance coupling, and the other adjacent electrodes are capacitively coupled. The dielectric filter characterized in that
た導体膜パターンである請求項１記載の誘電体フィル
タ。2. The dielectric filter according to claim 1, wherein the inductor is a conductor film pattern formed on the insulating plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988137994U JPH0731604Y2 (en) | 1988-10-22 | 1988-10-22 | Dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988137994U JPH0731604Y2 (en) | 1988-10-22 | 1988-10-22 | Dielectric filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0260302U JPH0260302U (en) | 1990-05-02 |
| JPH0731604Y2 true JPH0731604Y2 (en) | 1995-07-19 |
Family
ID=31399928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988137994U Expired - Lifetime JPH0731604Y2 (en) | 1988-10-22 | 1988-10-22 | Dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0731604Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006254114A (en) * | 2005-03-10 | 2006-09-21 | Soshin Electric Co Ltd | Delay line |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5976104U (en) * | 1982-11-14 | 1984-05-23 | 株式会社村田製作所 | filter device |
| JPS61191101A (en) * | 1985-02-19 | 1986-08-25 | Murata Mfg Co Ltd | Filter |
| JPS61193501A (en) * | 1985-02-21 | 1986-08-28 | Murata Mfg Co Ltd | Filter |
| JPH051122Y2 (en) * | 1985-10-19 | 1993-01-13 | ||
| JPS63124601A (en) * | 1986-11-14 | 1988-05-28 | Oki Electric Ind Co Ltd | Dielectric filter |
| JP2579476B2 (en) * | 1987-02-20 | 1997-02-05 | 株式会社村田製作所 | Composite filter |
| JP2786204B2 (en) * | 1988-07-25 | 1998-08-13 | 松下電器産業株式会社 | Band stop filter |
-
1988
- 1988-10-22 JP JP1988137994U patent/JPH0731604Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0260302U (en) | 1990-05-02 |
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