JPH03155201A - High frequency filter device - Google Patents
High frequency filter deviceInfo
- Publication number
- JPH03155201A JPH03155201A JP29587089A JP29587089A JPH03155201A JP H03155201 A JPH03155201 A JP H03155201A JP 29587089 A JP29587089 A JP 29587089A JP 29587089 A JP29587089 A JP 29587089A JP H03155201 A JPH03155201 A JP H03155201A
- Authority
- JP
- Japan
- Prior art keywords
- trap
- patterns
- pattern
- high frequency
- transmission 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
- 230000008054 signal transmission Effects 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、高周波回路に用いる高周波フィルター装置に
関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a high frequency filter device used in a high frequency circuit.
従来の技術
従来の高周波フィルター装置は、第５図および第７図に
示すような構成になっていた。2. Description of the Related Art Conventional high frequency filter devices have configurations as shown in FIGS. 5 and 7.
すなわち、第７図に示すように、基板１５上に、３つ以
上の独立した共振子１１．１２．１３１４を設けて高周
波フィルター装置が構成されている。なお第８図は、前
記第７図の高周波フィルター 装置の周波数特性を示す
。That is, as shown in FIG. 7, three or more independent resonators 11, 12, 1314 are provided on a substrate 15 to constitute a high frequency filter device. Note that FIG. 8 shows the frequency characteristics of the high frequency filter device shown in FIG. 7.
また第５図に示すように、基板７上に信号伝送線路８と
これに枝状に設けたトラップパターン９、ｌＯを設けて
高周波フィルター装置を構造している。Further, as shown in FIG. 5, a high frequency filter device is constructed by providing a signal transmission line 8 on a substrate 7, and trap patterns 9 and 1O provided in branch shapes on the signal transmission line 8.
なお第６図は、前記第５図の高周波フィルター装置の周
波数特性を示す。Note that FIG. 6 shows the frequency characteristics of the high frequency filter device shown in FIG. 5.
上記のように高周波フィルター装置は、必要周波数帯幅
により第５図と第７図の方式を使いわけていた。As mentioned above, the high-frequency filter device uses either the system shown in FIG. 5 or the system shown in FIG. 7 depending on the required frequency bandwidth.
発明が解決しようとする課題
しかしながら上記従来の構成において、第７図の高周波
フィルター装置は、必要伝送帯域幅は広くとれるが、そ
の反面独立した共振子１１，１２゜１３．１４が基板１
５の影響を受けやすく、前記伝送帯域幅の損失は太き（
なってしまい、減衰域は広い。Problems to be Solved by the Invention However, in the conventional configuration described above, the high frequency filter device shown in FIG.
5, and the transmission bandwidth loss is large (
The attenuation range is wide.
つぎに第５図の高周波フィルター装置は、必要伝送帯域
幅を広くとれ、かつ損失は小さい。しかし、減衰域が狭
いという問題点を有していた。Next, the high frequency filter device shown in FIG. 5 can have a wide required transmission bandwidth and have small loss. However, there was a problem that the attenuation range was narrow.
そこで本発明は、上記従来の問題点を解決するもので、
必要伝送帯域幅を広く、かつ低損失で、また減衰帯域幅
を広くすることができる高周波フィルター装置を提供す
ることを目的とするものである。Therefore, the present invention solves the above-mentioned conventional problems.
It is an object of the present invention to provide a high frequency filter device that can widen the required transmission bandwidth, have low loss, and widen the attenuation bandwidth.
課題を解決するための手段
この課題を解決するために本発明の高周波フィルター装
置は、基板上に設けた信号伝送線路と、この伝送線路に
枝状に設けたトラップパターンとを備え、前記トラップ
パターンは、信号伝送線路に接続された細いパターンと
、この細いパターンの先端側に接続した太いパターンを
有する構成としたものである。Means for Solving the Problem In order to solve this problem, a high frequency filter device of the present invention includes a signal transmission line provided on a substrate, and a trap pattern provided in a branch shape on the transmission line, and the trap pattern has a configuration including a thin pattern connected to a signal transmission line and a thick pattern connected to the tip side of the thin pattern.
作用
本発明は、上記した構成により必要伝送帯域幅の損失は
小さく、減衰帯域幅は広く、かつ損失も太き（すること
が実現できる。Effects of the present invention With the above-described configuration, the loss of the required transmission bandwidth is small, the attenuation bandwidth is wide, and the loss is large.
実施例
以下、本発明の一実施例について、図面を参照しながら
説明する。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図に示すように高周波回路用両面基板１上に、平面
回路で構成された信号伝送線路２が形成され前記信号伝
送線路２に対し直角にトラップパターン３，５が設けら
れている。そして前Ｘａ トラップパターン３．５より
も幅の太いトラップパターン４，６をトラップパターン
３，５の先端に接続し高周波フィルター装置が構成され
ている。As shown in FIG. 1, a signal transmission line 2 composed of a planar circuit is formed on a double-sided substrate 1 for high frequency circuits, and trap patterns 3 and 5 are provided at right angles to the signal transmission line 2. Trap patterns 4 and 6, which are wider than the previous Xa trap pattern 3.5, are connected to the tips of the trap patterns 3 and 5 to form a high frequency filter device.
またトラップパターン３，５間の間隔は、入力周波数の
１／４波長でありトラップパターン３からトラップパタ
ーン４、トラップパターン５からトラップパターン６の
長さは、約１／４波長で構成される。Further, the interval between trap patterns 3 and 5 is 1/4 wavelength of the input frequency, and the lengths from trap pattern 3 to trap pattern 4 and from trap pattern 5 to trap pattern 6 are approximately 1/4 wavelength.
以上のように構成された高周波フィルター装置について
、以下その関連動作を説明する。The related operations of the high frequency filter device configured as described above will be explained below.
第１図の高周波フィルター装置を簡単な等価回路におき
かえると、第３図に示す回路になる。If the high frequency filter device of FIG. 1 is replaced with a simple equivalent circuit, the circuit shown in FIG. 3 will be obtained.
また前記等価回路は数式
％式％（１）
）
（３）
）
（４）
ただしＲ・・・・・・特性インピーダンスが一般的に用
いられている。そして前記等価回路の代表特性は第４図
のように示されている。The equivalent circuit is expressed by the following formula: % (1) ) (3) ) (4) However, R...Characteristic impedance is generally used. The representative characteristics of the equivalent circuit are shown in FIG.
よって前記数式（１） 、 （２） 、 （３） 、
（４）と第４図の特性より、減衰帯域幅（ｆｈ ｆ
ｅ）はＣＩ、Ｃ２が大きく、かつＬｌ、Ｌ２が小さくな
れば、大きくできることがわかる。Therefore, the above formulas (1), (2), (3),
(4) and the characteristics shown in Figure 4, the attenuation bandwidth (fh f
It can be seen that e) can be increased if CI and C2 are large and Ll and L2 are small.
これは第１図のように、トラップパターン４゜６の幅を
太くし、トラップパターン３，５０幅を狭くすることに
より実現きで、それにより第１図の構成にすると、第２
図に示すように必要伝送帯域幅の損失は小さく、減衰帯
域幅は広く、かつ損失も大きくすることができる。This can be achieved by increasing the width of the trap pattern 4.6 and narrowing the width of the trap patterns 3 and 50, as shown in FIG.
As shown in the figure, the loss of the required transmission bandwidth is small, the attenuation bandwidth is wide, and the loss can be increased.
発明の効果
以上の実施例の説明により明らかなように、本発明は高
周波用基板状に設けた信号伝送線路と、この伝送線路に
枝状に設けたトラップパターンを備え、このトラップパ
ターンは、信号伝送線路に接続された細いパターンと、
この細いパターンの先端側に接続した太いパターンを設
けたことにより、必要伝送帯域幅の損失は小さく、減衰
帯域幅は広（、かつ損失も太き（することができる。Effects of the Invention As is clear from the description of the embodiments above, the present invention includes a signal transmission line provided in the form of a high-frequency substrate, and a trap pattern provided in the form of branches on this transmission line. A thin pattern connected to the transmission line,
By providing a thick pattern connected to the tip side of this thin pattern, the loss of the required transmission bandwidth is small, the attenuation bandwidth is wide (and the loss is also large).
第１図は本発明の一実施例の高周波フィルター装置のパ
ターン図、第２図は前記高周波フィルター装置の周波数
特性図、第３図は前記高周波フィルター装置の等価回路
図、第４図は高周波フィルター装置の周波数特性図、第
５図は従来の高周波フィルター装置のパターン図、第６
図は前記従来の高周波フィルター装置の周波数特性図、
第７図は従来の他の高周波フィルター装置のパターン図
、第８図は前記従来の他の高周波フィルター装置の周波
数特性図である。
１・・・・・・高周波用基板、２・・・・・・信号伝送
線路、３・・・・・・細いトラップパターン、４・・・
・・・幅の太いトラップパターン、５・・・・・・細い
トラップパターン、６・・・・・・幅の太いトラップパ
ターン。FIG. 1 is a pattern diagram of a high frequency filter device according to an embodiment of the present invention, FIG. 2 is a frequency characteristic diagram of the high frequency filter device, FIG. 3 is an equivalent circuit diagram of the high frequency filter device, and FIG. 4 is a high frequency filter The frequency characteristic diagram of the device, Figure 5 is a pattern diagram of a conventional high frequency filter device, and Figure 6 is a diagram of the frequency characteristics of the device.
The figure shows a frequency characteristic diagram of the conventional high frequency filter device,
FIG. 7 is a pattern diagram of another conventional high frequency filter device, and FIG. 8 is a frequency characteristic diagram of the other conventional high frequency filter device. 1... High frequency board, 2... Signal transmission line, 3... Thin trap pattern, 4...
... wide trap pattern, 5 ... thin trap pattern, 6 ... thick trap pattern.
Claims (1)
伝送線路に枝状に設けたトラップパターンとを備え、前
記トラップパターンは信号伝送線路に接続された細いパ
ターンと、この細いパターンの先端側に接続された太い
パターンにより形成された高周波フィルター装置。It includes a substrate, a signal transmission line provided on the substrate, and a trap pattern provided in a branch shape on the signal transmission line, and the trap pattern includes a thin pattern connected to the signal transmission line, and a tip of the thin pattern. High frequency filter device formed by a thick pattern connected to the side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29587089A JPH03155201A (en) | 1989-11-14 | 1989-11-14 | High frequency filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29587089A JPH03155201A (en) | 1989-11-14 | 1989-11-14 | High frequency filter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03155201A true JPH03155201A (en) | 1991-07-03 |
Family
ID=17826248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29587089A Pending JPH03155201A (en) | 1989-11-14 | 1989-11-14 | High frequency filter device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03155201A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004056441A (en) * | 2002-07-19 | 2004-02-19 | Mitsubishi Electric Corp | Band stop filter and high frequency package incorporating the same |
| US7256666B2 (en) | 2002-12-27 | 2007-08-14 | Mitsubishi Denki Kabushiki Kaisha | Band rejection filter with attenuation poles |
| JP2008131342A (en) * | 2006-11-21 | 2008-06-05 | Yokogawa Electric Corp | High-frequency filter |
| CN105720333A (en) * | 2016-01-28 | 2016-06-29 | 华为技术有限公司 | Filter |
| JP2019102886A (en) * | 2017-11-29 | 2019-06-24 | キヤノン株式会社 | Branch circuit |
-
1989
- 1989-11-14 JP JP29587089A patent/JPH03155201A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004056441A (en) * | 2002-07-19 | 2004-02-19 | Mitsubishi Electric Corp | Band stop filter and high frequency package incorporating the same |
| US7256666B2 (en) | 2002-12-27 | 2007-08-14 | Mitsubishi Denki Kabushiki Kaisha | Band rejection filter with attenuation poles |
| JP2008131342A (en) * | 2006-11-21 | 2008-06-05 | Yokogawa Electric Corp | High-frequency filter |
| CN105720333A (en) * | 2016-01-28 | 2016-06-29 | 华为技术有限公司 | Filter |
| JP2019102886A (en) * | 2017-11-29 | 2019-06-24 | キヤノン株式会社 | Branch circuit |
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