JPH03181203A - Resonator and high frequency filter using same resonator - Google Patents
Resonator and high frequency filter using same resonatorInfo
- Publication number
- JPH03181203A JPH03181203A JP31999489A JP31999489A JPH03181203A JP H03181203 A JPH03181203 A JP H03181203A JP 31999489 A JP31999489 A JP 31999489A JP 31999489 A JP31999489 A JP 31999489A JP H03181203 A JPH03181203 A JP H03181203A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- resonator
- capacitor
- conductor
- line
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 37
- 239000004020 conductor Substances 0.000 claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000002131 composite material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 239000012212 insulator Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はコードレス電話、各種通信機器等の電子回路、
特に発振器およびフィルタ等に利用される共振器および
それを用いた高周波フィルタに関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention is applicable to electronic circuits such as cordless telephones and various communication devices,
In particular, it relates to resonators used in oscillators, filters, etc., and high-frequency filters using the resonators.
従来の技術
従来における高周波用の発振器・フィルタ等に利用され
る共振器の小型化技術としては、第８図（特開昭６４−
１３０８参照）に示すように、ループ状のストリップ線
路１１の両開放端を共振用コンデンサ１２で接続したス
プリット・リング共振器が知られている。また、その他
の従来の小型化技術として第９図（特願昭６３−２４８
１３９参照）に示すように、伝送線路１１をスパイラル
状にしたものや、第１０図、第１１図（特願昭６１−１
５９０２２参照）に示すようにフィルタへの応用もなさ
れているが、その共振器の伝送線路１工の線路幅Ｗは、
たとえば、宮本幸彦著、“高周波回路の設計と実装”日
本放送出版協会発行等の出版物に数多くの記載がなされ
ているが、Ｈ，Ａ、 Ｗｈｅｅｌｅｒの近似式等によっ
て求めた線路幅Ｗにより、伝送線路の特性インピーダン
スを所望の特性インピーダンスとしていた。2. Prior Art Conventional technology for miniaturizing resonators used in high-frequency oscillators, filters, etc. is shown in Fig.
1308), a split ring resonator is known in which both open ends of a loop-shaped strip line 11 are connected by a resonance capacitor 12. In addition, as other conventional miniaturization techniques, Fig. 9 (Japanese Patent Application No. 63-248
139), the transmission line 11 may be made into a spiral shape, or as shown in FIGS.
59022), it has also been applied to filters, but the line width W of one transmission line of the resonator is
For example, there are many descriptions in publications such as "Design and Implementation of High Frequency Circuits" by Yukihiko Miyamoto, published by Japan Broadcasting Publishing Association, The characteristic impedance of the transmission line was set to a desired characteristic impedance.
発明が解決しようとする課題
しかしながら、伝送線路と接地導体の間に用いられる絶
縁体の比誘電率および厚みが決まれば、所望の特性イン
ピーダンスに合せるために伝送線路の線路幅が決まり、
小型化には限度があった。Problems to be Solved by the Invention However, once the dielectric constant and thickness of the insulator used between the transmission line and the ground conductor are determined, the line width of the transmission line is determined to match the desired characteristic impedance.
There were limits to miniaturization.
また、特性インピーダンスを変更したい場合、伝送線路
の線路幅の変更もしくは絶縁体の比誘電率、厚み等の変
更等が必要であり生産性が悪く、設計においても時間が
かかっていた。Furthermore, when it is desired to change the characteristic impedance, it is necessary to change the line width of the transmission line or change the relative dielectric constant, thickness, etc. of the insulator, which results in poor productivity and takes time in designing.
本発明は以上のような従来の欠点を除去し、小型で生産
および設計が容易な共振器およびその共振器を複数個使
ったフィルタを提供することを目的とするものである。It is an object of the present invention to eliminate the above-mentioned conventional drawbacks and to provide a resonator that is small and easy to produce and design, and a filter using a plurality of the resonators.
課題を解決するための手段
上記課題を解決する本発明の技術的手段は、絶縁基板の
片面の全面に接地導体を設け、この絶縁基板の他面に上
記接地導体とによって形成されるインピーダンスが、所
望の特性インピーダンスより高くなるような幅をもった
伝送線路を形成し、この伝送線路の両開放端間に共振用
コンデンサを接続するとともに、この伝送線路の一部と
絶縁基板の他面に設けた接地導体間にインピーダンス整
合用コンデンサを電気的に接続し、かつ上記伝送線路の
一部に入力端子を設けた構造としたものである。Means for Solving the Problems The technical means of the present invention for solving the above problems is such that a ground conductor is provided on the entire surface of one side of the insulating substrate, and the impedance formed by the ground conductor on the other side of the insulating substrate is A transmission line with a width higher than the desired characteristic impedance is formed, a resonant capacitor is connected between both open ends of this transmission line, and a resonant capacitor is provided on a part of this transmission line and on the other side of the insulating substrate. In this structure, an impedance matching capacitor is electrically connected between the ground conductors and an input terminal is provided on a part of the transmission line.
作用 この技術的手段による作用は次のようになる。action The effect of this technical means is as follows.
すなわち、絶縁基板の片面の全面に接地導体を設け、こ
の絶縁基板の他面に上記接地導体とによって形成される
インピーダンスが、所望の特性インピーダンスより高く
なるような幅をもった伝送線路を形成し、この伝送線路
の両開放端間に共振用コンデンサを接続するとともに、
この伝送線路の一部と絶縁基板の他面に設けた接地導体
間にインピーダンス整合用コンデンサを電気的に接続し
、かつ上記伝送線路の一部に入力端子を設けることによ
り、伝送線路の幅をストリップラインに比べて大幅に狭
くすることができる。また、インピーダンス整合用コン
デンサの容量値を変えることにより、特性インピーダン
スの変更が容易にできる。That is, a grounding conductor is provided on the entire surface of one side of an insulating substrate, and a transmission line having a width such that the impedance formed by the grounding conductor and the grounding conductor is higher than the desired characteristic impedance is formed on the other side of the insulating substrate. , a resonant capacitor is connected between both open ends of this transmission line, and
By electrically connecting an impedance matching capacitor between a part of this transmission line and a ground conductor provided on the other side of the insulating substrate, and providing an input terminal on a part of the transmission line, the width of the transmission line can be reduced. It can be made much narrower than stripline. Further, by changing the capacitance value of the impedance matching capacitor, the characteristic impedance can be easily changed.
実施例
以下、本発明の実施例を添付の図面にもとづいて説明す
る。Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.
第１図、第２図、第３図は本発明の一実施例の上面図、
側面図、底面図である。1, 2, and 3 are top views of an embodiment of the present invention,
They are a side view and a bottom view.
第１図〜第３図において、絶縁基板１の片面の全面に接
地導体２を設け、この絶縁基板１の他面に上記接地導体
２とによって形成されるインピーダンスが所望の特性イ
ンピーダンスより高くなるような幅Ｗをもった伝送線路
３を形成し、この伝送線路３の両開放端間に共振用コン
デンサ４を接続するとともに、この伝送線路３の一部と
絶縁基板１の他面に設けた接地導体２間に電気的に接続
するために設けられたコンデンサ接地用導体５間にイン
ピーダンス整合用コンデンサ６を接続し、上記コンデン
サ接続用導体５と接地導体２はスルホール７で電気的に
接続され、かつ上記伝送回路３の一部に入力端子８を設
けている。このように、伝送線路３のインピーダンスを
所望の特性インピーダンスよりも高くなるように線路幅
Ｗをマイクロストリップライン理論の近似式より求まる
線路幅より狭くシ、インピーダンス整合用のコンデンサ
６を接続して所望の特性インピーダンスを得ることによ
り、上記伝送線路３のインダクタンス値が大幅に増加し
、共振周波数の低周波化および共振器の小型化ができる
。1 to 3, a ground conductor 2 is provided on the entire surface of one side of an insulating substrate 1, and the impedance formed by the ground conductor 2 on the other side of the insulating substrate 1 is set to be higher than the desired characteristic impedance. A transmission line 3 having a width W is formed, a resonant capacitor 4 is connected between both open ends of this transmission line 3, and a ground connection is provided on a part of this transmission line 3 and the other surface of the insulating substrate 1. An impedance matching capacitor 6 is connected between capacitor grounding conductors 5 provided for electrically connecting between the conductors 2, and the capacitor connecting conductor 5 and the grounding conductor 2 are electrically connected through a through hole 7, In addition, an input terminal 8 is provided in a part of the transmission circuit 3. In this way, in order to make the impedance of the transmission line 3 higher than the desired characteristic impedance, the line width W is made narrower than the line width determined by the approximation formula of microstrip line theory, and the capacitor 6 for impedance matching is connected to obtain the desired characteristic impedance. By obtaining the characteristic impedance of , the inductance value of the transmission line 3 is significantly increased, and the resonant frequency can be lowered and the resonator can be made smaller.
第４図は、本発明の他のもう一つの実施例であり、伝送
線路３がスパイラル状となっており、コンデンサ接地用
導体５を共振器の外側に設けである。FIG. 4 shows another embodiment of the present invention, in which the transmission line 3 has a spiral shape and a capacitor grounding conductor 5 is provided outside the resonator.
第５図は、本発明の共振器のフィルタへの応用実施例で
あり、第４図の実施例の共振器を２個誘導的に結合させ
てフィルタ構成としている。また第５図の実施例では本
発明の共振器２個を誘導結合させたものであるが、共振
器の数は２個に限らず、複数個であればフィルタとなる
ことは言うまでもない。FIG. 5 shows an example in which the resonator of the present invention is applied to a filter, in which two resonators of the embodiment shown in FIG. 4 are inductively coupled to form a filter configuration. Further, in the embodiment shown in FIG. 5, two resonators of the present invention are inductively coupled, but the number of resonators is not limited to two, and it goes without saying that a plurality of resonators can serve as a filter.
また、第４図、第５図の実施例のようにコンデンサ接続
用導体５を共振器の外側かつ絶縁基板１の端面の近くに
設けることにより、スルホール７の代わりに第６図のよ
うな接続用クリップ９で絶縁基板１を挟み込んで、コン
デンサ接続用導体５と接地導体２を電気的に接続するこ
とも可能であり、第７図のような接続用クリップ端子１
０を用いても良い。Furthermore, by providing the capacitor connecting conductor 5 outside the resonator and near the end face of the insulating substrate 1 as in the embodiments shown in FIGS. 4 and 5, the connection as shown in FIG. 6 can be made instead of the through hole 7. It is also possible to electrically connect the capacitor connecting conductor 5 and the grounding conductor 2 by sandwiching the insulating substrate 1 with the connecting clip 9, and the connecting clip terminal 1 as shown in FIG.
0 may also be used.
発明の効果
以上のように本発明は、共振器の伝送線路の線路幅を狭
くすることにより伝送線路のインダクタンス値が大きく
とれ、共振周波数を低くすることができる。または伝送
線路のインダクタンス値を同じにすれば共振器の大幅な
小型化ができる効果が得られる。特に伝送線路がスパイ
ラル状の場合はその効果が大きくなる。Effects of the Invention As described above, in the present invention, by narrowing the line width of the transmission line of the resonator, the inductance value of the transmission line can be increased, and the resonant frequency can be lowered. Alternatively, by making the inductance values of the transmission lines the same, it is possible to significantly downsize the resonator. This effect is particularly significant when the transmission line is spiral-shaped.
また、インピーダンス整合用コンデンサの容量値を変更
するのみで、共振器の特性インピーダンスを容易に変更
でき、数種類の異なるインピーダンスの共振器またはフ
ィルタに対し、一種類の伝送線路で生産が可能であり、
設計のしやすさとともに生産の効率が向上する効果が得
られる。In addition, the characteristic impedance of the resonator can be easily changed simply by changing the capacitance value of the impedance matching capacitor, making it possible to produce several types of resonators or filters with different impedances using one type of transmission line.
This has the effect of making design easier and improving production efficiency.
第１図、第２図、第３図は本発明の一実施例を示す上面
図、側面図、底面図、第４図、第５図は本発明の他の実
施例の上面図、第６図、第７図は１・・・・・・絶縁基
板、２・・・・・・接地導体、３・・・・・・伝送線路
、４・・・・・・共振用コンデンサ、５・・・・・・コ
ンデンサ接地用導体、６・・・・・・インピーダンス整
合用コンデンサ、７・・・・・・スルホール、８・・・
・・・入力端子、９・・・・・・クリップ、１０・・・
・・・クリップ端子。1, 2, and 3 are top views, side views, and bottom views showing one embodiment of the present invention; FIGS. 4 and 5 are top views of another embodiment of the present invention; and FIG. Figure 7 shows 1...Insulating substrate, 2...Grounding conductor, 3...Transmission line, 4...Resonance capacitor, 5... ...Capacitor grounding conductor, 6... Impedance matching capacitor, 7... Through hole, 8...
...Input terminal, 9...Clip, 10...
...Clip terminal.
Claims (3)
縁基板の他面に上記接地導体とによって形成されるイン
ピーダンスが、所望の特性インピーダンスより高くなる
ような幅をもった伝送線路を形成し、この伝送線路の両
開放端間に共振用コンデンサを接続するとともに、この
伝送線路の一部と絶縁基板の他面に設けた接地導体間に
インピーダンス整合用コンデンサを電気的に接続し、か
つ上記伝送線路の一部に入力端子を設けたことを特徴と
する共振器。(1) A grounding conductor is provided on the entire surface of one side of the insulating substrate, and a transmission line is formed on the other side of the insulating substrate with a width such that the impedance formed by the grounding conductor is higher than the desired characteristic impedance. A resonance capacitor is connected between both open ends of this transmission line, and an impedance matching capacitor is electrically connected between a part of this transmission line and a ground conductor provided on the other side of the insulated substrate, and A resonator characterized in that an input terminal is provided in a part of the transmission line.
共振器。(2) The resonator according to claim 1, wherein the transmission line is a multiple spiral.
が近接結合されるように複合個組合せてなる高周波フィ
ルタ。(3) A high frequency filter formed by combining the resonators according to claim 1 or 2 in a composite manner so that one side of the transmission line is closely coupled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31999489A JPH03181203A (en) | 1989-12-08 | 1989-12-08 | Resonator and high frequency filter using same resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31999489A JPH03181203A (en) | 1989-12-08 | 1989-12-08 | Resonator and high frequency filter using same resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03181203A true JPH03181203A (en) | 1991-08-07 |
Family
ID=18116564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31999489A Pending JPH03181203A (en) | 1989-12-08 | 1989-12-08 | Resonator and high frequency filter using same resonator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03181203A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6943644B2 (en) | 2001-12-18 | 2005-09-13 | Murata Manufacturing Co. Ltd. | Resonator, filter, duplexer, and communication apparatus |
| JP2023086056A (en) * | 2021-12-09 | 2023-06-21 | 株式会社Tte | Potential stabilization circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6314501A (en) * | 1986-07-07 | 1988-01-21 | Matsushita Electric Ind Co Ltd | High frequency filter |
| JPS641308A (en) * | 1987-06-24 | 1989-01-05 | Matsushita Electric Ind Co Ltd | Ring type resonator |
-
1989
- 1989-12-08 JP JP31999489A patent/JPH03181203A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6314501A (en) * | 1986-07-07 | 1988-01-21 | Matsushita Electric Ind Co Ltd | High frequency filter |
| JPS641308A (en) * | 1987-06-24 | 1989-01-05 | Matsushita Electric Ind Co Ltd | Ring type resonator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6943644B2 (en) | 2001-12-18 | 2005-09-13 | Murata Manufacturing Co. Ltd. | Resonator, filter, duplexer, and communication apparatus |
| JP2023086056A (en) * | 2021-12-09 | 2023-06-21 | 株式会社Tte | Potential stabilization circuit |
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