JPH08186407A - Dielectric filter - Google Patents
Dielectric filterInfo
- Publication number
- JPH08186407A JPH08186407A JP28095A JP28095A JPH08186407A JP H08186407 A JPH08186407 A JP H08186407A JP 28095 A JP28095 A JP 28095A JP 28095 A JP28095 A JP 28095A JP H08186407 A JPH08186407 A JP H08186407A
- Authority
- JP
- Japan
- Prior art keywords
- conductive patterns
- pattern
- patterns
- coupling
- substrate
- 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、無線通信機器等に用い
る誘電体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 dielectric filter used in wireless communication equipment and the like.
【０００２】[0002]
【従来の技術】以下、従来の誘電体フィルタについて図
面を参照しながら説明する。2. Description of the Related Art A conventional dielectric filter will be described below with reference to the drawings.
【０００３】図４は従来の誘電体フィルタの斜視図であ
り、図５（ａ）（ｂ）は同誘電体フィルタの結合基板の
上面図および下面図であり、図５（ｃ）は同誘電体フィ
ルタの等価回路図であり、図５（ｄ）は同誘電体フィル
タの周波数特性図である。FIG. 4 is a perspective view of a conventional dielectric filter, FIGS. 5 (a) and 5 (b) are a top view and a bottom view of a coupling substrate of the same dielectric filter, and FIG. 5 (c) is the same dielectric filter. FIG. 5D is an equivalent circuit diagram of the body filter, and FIG. 5D is a frequency characteristic diagram of the same dielectric filter.
【０００４】図４、図５（ａ）（ｂ）に示すように、従
来の誘電体フィルタは、入出力端子を備えたベース基板
１と、このベース基板１上に設けた結合基板２と、この
結合基板２表面上に設けた貫通孔を有した共振器３と、
この共振器３と結合基板２とを電気的に接続する共振器
金具４を備えている。As shown in FIGS. 4 and 5A and 5B, the conventional dielectric filter includes a base substrate 1 having input / output terminals, and a coupling substrate 2 provided on the base substrate 1. A resonator 3 having a through hole provided on the surface of the coupling substrate 2;
A resonator fitting 4 for electrically connecting the resonator 3 and the coupling substrate 2 is provided.
【０００５】また、結合基板２は、表面上には２つの導
電性パターン５ａ，５ｂを対向して設けており、それぞ
れ対向する部分を櫛状にした第１の結合パターンを有
し、裏面上には２つの導電性パターン６ａ，６ｂを対向
してなる第２の結合パターンを有している。Further, the combined substrate 2 has two conductive patterns 5a and 5b provided on the front surface so as to face each other, and has a first combined pattern in which the opposing portions are comb-shaped, and is provided on the back surface. Has a second coupling pattern in which two conductive patterns 6a and 6b are opposed to each other.
【０００６】さらに、結合基板２の第２の結合パターン
となる２つの導電性パターン６ａ，６ｂは第１の結合パ
ターンとなる２つの導電性パターン５ａ，５ｂとそれぞ
れ対向する構成としたものである。Further, the two conductive patterns 6a and 6b which are the second bonding patterns of the bonding substrate 2 are configured to face the two conductive patterns 5a and 5b which are the first bonding patterns, respectively. .
【０００７】この構成による誘電体フィルタの等価回路
図は図５（ｃ）に示すようになり、Ｃ1，Ｃ3はそれぞれ
結合基板２を挟んで対向する導電性パターン５ａと６
ａ、５ｂと６ｂからそれぞれ形成され、Ｃ2は導電性パ
ターン５ａと５ｂ間の櫛状のパターンによって形成さ
れ、Ｃ4は導電性パターン６ａと６ｂのパターン間によ
って形成されている。An equivalent circuit diagram of the dielectric filter having this structure is shown in FIG. 5C, and C 1 and C 3 are conductive patterns 5a and 6 facing each other with the coupling substrate 2 interposed therebetween.
a, 5b and 6b respectively, C 2 is formed by a comb-like pattern between the conductive patterns 5a and 5b, and C 4 is formed between the patterns of the conductive patterns 6a and 6b.
【０００８】また、周波数特性図は図５（ｄ）に示すよ
うになる。The frequency characteristic diagram is as shown in FIG. 5 (d).
【０００９】[0009]
【発明が解決しようとする課題】上記構成では、誘電体
フィルタの周波数通過帯域において、通過帯域以外の減
衰量が急激に大きくならないので、ノイズを減らすこと
ができず、送信、受信時における電波妨害が生じるとい
う問題点を有していた。In the above configuration, since the attenuation amount other than the pass band does not suddenly increase in the frequency pass band of the dielectric filter, noise cannot be reduced, and the electromagnetic interference during transmission and reception is reduced. There was a problem that occurs.
【００１０】本発明は上記問題点を解決するもので、周
波数通過帯域以外の減衰量を大き櫛てノイズを減らし、
送信、受信時において電波妨害の発生を極力防止した誘
電体フィルタを提供することを目的としている。The present invention solves the above problems by reducing the noise by combing the attenuation amount outside the frequency pass band.
It is an object of the present invention to provide a dielectric filter that prevents the occurrence of radio wave interference during transmission and reception as much as possible.
【００１１】[0011]
【課題を解決するための手段】本発明は上記目的を達成
するために、結合基板と、前記結合基板表面上に設けた
貫通孔を有した共振器と、前記共振器と前記結合基板と
を電気的に接続する共振器金具と、前記共振器を被覆す
る金属カバーとを備え、前記結合基板は、表面上には２
つの導電性パターンを対向して設けた第１の結合パター
ンを有し、裏面上には２つの導電性パターンを対向して
設けた第２の結合パターンを有しており、前記結合基板
の第２の結合パターンとなる２つの導電性パターンは前
記第１の結合パターンとなる２つの導電性パターンとそ
れぞれ対向するとともに、第２の結合パターンとなる２
つの導電性パターンの内いずれか一方は、第１の結合パ
ターンとなる２つの導電性パターンの両方と対向する構
成としたものである。In order to achieve the above object, the present invention provides a coupling substrate, a resonator having a through hole formed on the surface of the coupling substrate, the resonator and the coupling substrate. The resonator substrate includes an electrically connected resonator metal member and a metal cover that covers the resonator.
A first coupling pattern provided with two conductive patterns facing each other, and a second coupling pattern provided with two conductive patterns facing each other on the back surface. The two conductive patterns serving as the second bonding pattern face the two conductive patterns serving as the first bonding pattern, respectively, and serve as the second bonding pattern 2
Either one of the two conductive patterns is configured to face both of the two conductive patterns serving as the first coupling pattern.
【００１２】[0012]
【作用】上記構成により、結合基板の第２の結合パター
ンとなる２つの導電性パターンが第１の結合パターンと
なる２つの導電性パターンとそれぞれ対向するととも
に、第２の結合パターンとなる２つの導電性パターンの
内いずれか一方が、第１の結合パターンとなる２つの導
電性パターンの両方と対向している。これにより、第１
の結合パターンである２つの導電性パターンの両方と対
向する、第２の結合パターンの２つの導電性パターンの
一方が、有極特性を得るための容量を生じるので、周波
数通過帯域以外の減衰を大きくすることができる。With the above structure, the two conductive patterns serving as the second bonding patterns of the bonding substrate face the two conductive patterns serving as the first bonding patterns, respectively, and the two conductive patterns serving as the second bonding patterns are formed. Either one of the conductive patterns faces both of the two conductive patterns serving as the first coupling pattern. Thereby, the first
One of the two conductive patterns of the second coupling pattern, which faces both of the two conductive patterns of the second coupling pattern, generates a capacitance for obtaining the polar characteristic, so that attenuation other than the frequency pass band is generated. Can be large.
【００１３】[0013]
【実施例】以下、本発明における一実施例の誘電体フィ
ルタについて図面を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dielectric filter according to an embodiment of the present invention will be described below with reference to the drawings.
【００１４】図１の（ａ）（ｂ）は本実施例における誘
電体フィルタの結合基板の上面図および下面図であり、
図２は同誘電体フィルタの斜視図であり、図３（ａ）は
同誘電体フィルタの等価回路図であり、図３（ｂ）は同
誘電体フィルタの周波数特性図である。FIGS. 1A and 1B are a top view and a bottom view of a combined substrate of a dielectric filter according to this embodiment,
2 is a perspective view of the same dielectric filter, FIG. 3 (a) is an equivalent circuit diagram of the same dielectric filter, and FIG. 3 (b) is a frequency characteristic diagram of the same dielectric filter.
【００１５】従来の誘電体フィルタと同一構成部分は同
一番号を付している。図１、図２に示すように、本実施
例の誘電体フィルタにおいて、従来の誘電体フィルタと
同一構成部分は同一番号を付している。The same components as those of the conventional dielectric filter are designated by the same reference numerals. As shown in FIGS. 1 and 2, in the dielectric filter of this embodiment, the same components as those of the conventional dielectric filter are designated by the same reference numerals.
【００１６】本実施例の誘電体フィルタは、入出力端子
を備えたベース基板１と、このベース基板１上に設けた
結合基板２と、この結合基板２表面上に設けた貫通孔を
有し誘電体同軸型の共振器３と、この共振器３と結合基
板２とを電気的に接続する共振器金具４とを備えてい
る。The dielectric filter of this embodiment has a base substrate 1 having input / output terminals, a joint substrate 2 provided on the base substrate 1, and a through hole formed on the surface of the joint substrate 2. The resonator 3 includes a dielectric coaxial resonator 3 and a resonator fitting 4 that electrically connects the resonator 3 and the coupling substrate 2.
【００１７】また、結合基板２は、表面上には２つの導
電性パターン５ａ，５ｂを対向してなり、それぞれ対向
する部分を櫛状にした第１の結合パターンを有し、裏面
上には２つの導電性パターン７ａ，７ｂを対向してなる
第２の結合パターンを有している。The combined substrate 2 has a first combined pattern in which two conductive patterns 5a and 5b are opposed to each other on the front surface, and the opposing parts are formed in a comb shape, and on the rear surface. It has a second coupling pattern in which two conductive patterns 7a and 7b are opposed to each other.
【００１８】さらに、結合基板２の第２の結合パターン
となる２つの導電性パターン７ａ，７ｂは第１の結合パ
ターンとなる２つの導電性パターン５ａ，５ｂとそれぞ
れ対向するとともに、第２の結合パターンの２つの導電
性パターン７ａ，７ｂの内、一方７ａは第１の結合パタ
ーンの２つの導電性パターン５ａ，５ｂの両方と対向す
るように台形状の斜辺を他方７ｂ側へ延長している。Further, the two conductive patterns 7a and 7b serving as the second bonding pattern of the bonding substrate 2 are opposed to the two conductive patterns 5a and 5b serving as the first bonding pattern, respectively, and the second bonding pattern is formed. Of the two conductive patterns 7a and 7b of the pattern, one side 7a extends a trapezoidal oblique side toward the other 7b side so as to face both of the two conductive patterns 5a and 5b of the first coupling pattern. .
【００１９】このとき、等価回路図は図３（ａ）に示す
ようになり、Ｃ1，Ｃ3は結合基板２を挟んで対向する導
電性パターン５ａと７ａ、５ｂと７ｂからそれぞれ形成
され、Ｃ2は５ａと５ｂ間の櫛状のパターンから形成さ
れ、Ｃ4は７ａと５ｂのパターンの対向する部分で形成
され、Ｃ5は７ａと７ｂのパターンから形成されてい
る。At this time, the equivalent circuit diagram is as shown in FIG. 3 (a), and C 1 and C 3 are formed from conductive patterns 5a and 7a, 5b and 7b which face each other with the coupling substrate 2 interposed therebetween, C 2 is formed by a comb-shaped pattern between 5a and 5b, C 4 is formed at a portion where patterns of 7a and 5b face each other, and C 5 is formed by patterns of 7a and 7b.
【００２０】また、周波数特性図は図３（ｂ）に示すよ
うになる。上記構成の誘電体フィルタについて、以下そ
の動作を説明する。The frequency characteristic diagram is as shown in FIG. 3 (b). The operation of the dielectric filter having the above structure will be described below.
【００２１】結合基板２の第２の結合パターンとなる２
つの導電性パターン７ａ，７ｂが、第１の結合パターン
となる２つの導電性パターン５ａ，５ｂとそれぞれ対向
するとともに、第２の結合パターンの２つの導電性パタ
ーン７ａ，７ｂの内、一方７ａが第１の結合パターンの
２つの導電性パターン５ａ，５ｂの両方と対向している
ので、第１の結合パターンである２つの導電性パターン
５ａ，５ｂの両方と対向する、第２の結合パターンの２
つの導電性パターン７ａ，７ｂの一方７ａが、有極特性
を得るための容量を生じる。この結果、周波数特性図が
図３（ｂ）に示すようになり、周波数通過帯域以外の減
衰を大きくすることができる。2 to be the second bonding pattern of the bonding substrate 2
The two conductive patterns 7a and 7b face the two conductive patterns 5a and 5b, respectively, which are the first coupling patterns, and one of the two conductive patterns 7a and 7b of the second coupling pattern is 7a. Since the two conductive patterns 5a and 5b of the first coupling pattern are opposed to each other, the two coupling patterns of the second coupling pattern 5a and 5b which are the first coupling pattern are opposed to each other. Two
One of the two conductive patterns 7a and 7b, 7a, produces a capacitance for obtaining a polar characteristic. As a result, the frequency characteristic diagram becomes as shown in FIG. 3B, and the attenuation outside the frequency pass band can be increased.
【００２２】このように本実施例では、第１の結合パタ
ーンである２つの導電性パターン５ａ，５ｂの両方と対
向する、第２の結合パターンの導電性パターン７ａ，７
ｂの一方７ａが、有極特性を得るための容量を生じるの
で、周波数通過帯域以外の減衰を大きくすることがで
き、ノイズを減らし、送信、受信時において電波妨害の
発生を極力防止できる。As described above, in this embodiment, the conductive patterns 7a, 7 of the second coupling pattern, which face both the two conductive patterns 5a, 5b of the first coupling pattern, are opposed to each other.
Since one side 7a of b produces a capacity for obtaining the polar characteristic, attenuation outside the frequency pass band can be increased, noise can be reduced, and occurrence of radio interference during transmission and reception can be prevented as much as possible.
【００２３】なお、本実施例では、第１の結合パターン
である２つの導電性パターン５ａ，５ｂの両方と対向す
る、第２の結合パターンの導電性パターン７ａ，７ｂの
一方７ａの形状を台形形状としたが、第１の結合パター
ンである２つの導電性パターン５ａ，５ｂの両方と対向
する部分を有した形状であれば、その他の形状でもよ
い。In this embodiment, one of the conductive patterns 7a and 7b of the second coupling pattern, which is opposed to both of the two conductive patterns 5a and 5b of the first coupling pattern, has a trapezoidal shape. Although the shape is used, another shape may be used as long as it has a portion facing both of the two conductive patterns 5a and 5b that are the first coupling patterns.
【００２４】[0024]
【発明の効果】以上のように本発明によれば、結合基板
の第２の結合パターンとなる２つの導電性パターンが第
１の結合パターンとなる２つの導電性パターンとそれぞ
れ対向するとともに、第２の結合パターンとなる２つの
導電性パターンの内いずれか一方が、第１の結合パター
ンとなる２つの導電性パターンの両方と対向している。
これにより、第１の結合パターンである２つの導電性パ
ターンの両方と対向する、第２の結合パターンの２つの
導電性パターンの一方が、有極特性を得るための容量を
生じる。この結果、周波数通過帯域以外の減衰を大きく
することができ、ノイズを減らし、送信、受信時におい
て電波妨害の発生を極力防止した誘電体フィルタを提供
することができる。As described above, according to the present invention, the two conductive patterns serving as the second bonding patterns of the bonding substrate face the two conductive patterns serving as the first bonding patterns, respectively, and One of the two conductive patterns serving as the second bonding pattern faces both of the two conductive patterns serving as the first bonding pattern.
As a result, one of the two conductive patterns of the second coupling pattern facing both of the two conductive patterns of the first coupling pattern produces a capacitance for obtaining the polar characteristic. As a result, attenuation outside the frequency pass band can be increased, noise can be reduced, and a dielectric filter that can prevent the occurrence of radio interference during transmission and reception as much as possible can be provided.
【図１】（ａ）は本発明の一実施例における誘電体フィ
ルタの結合基板の上面図 （ｂ）は（ａ）の下面図1A is a top view of a coupled substrate of a dielectric filter according to an embodiment of the present invention, and FIG. 1B is a bottom view of FIG. 1A.
【図２】誘電体フィルタの斜視図FIG. 2 is a perspective view of a dielectric filter.
【図３】（ａ）は誘電体フィルタの等価回路図 （ｂ）は誘電体フイルタの周波数特性図3A is an equivalent circuit diagram of a dielectric filter, and FIG. 3B is a frequency characteristic diagram of a dielectric filter.
【図４】従来の誘電体フィルタの斜視図FIG. 4 is a perspective view of a conventional dielectric filter.
【図５】（ａ）は誘電体フィルタの結合基板の上面図 （ｂ）は（ａ）の下面図 （ｃ）は誘電体フィルタの等価回路図 （ｄ）は誘電体フィルタの周波数特性図5A is a top view of a coupled substrate of a dielectric filter, FIG. 5B is a bottom view of FIG. 5A, FIG. 5C is an equivalent circuit diagram of the dielectric filter, and FIG. 5D is a frequency characteristic diagram of the dielectric filter.
１ ベース基板 ２ 結合基板 ３ 共振器 ４ 共振器金具 ５ａ 導電性パターン ５ｂ 導電性パターン ７ａ 導電性パターン ７ｂ 導電性パターン 1 Base Board 2 Coupling Board 3 Resonator 4 Resonator Metal Fitting 5a Conductive Pattern 5b Conductive Pattern 7a Conductive Pattern 7b Conductive Pattern
Claims (2)
た貫通孔を有した共振器と、前記共振器と前記結合基板
とを電気的に接続する共振器金具と、前記共振器を被覆
する金属カバーとを備え、前記結合基板は、表面上には
２つの導電性パターンを対向して設けた第１の結合パタ
ーンを有し、裏面上には２つの導電性パターンを対向し
て設けた第２の結合パターンを有しており、前記結合基
板の第２の結合パターンとなる２つの導電性パターンは
前記第１の結合パターンとなる２つの導電性パターンと
それぞれ対向するとともに、第２の結合パターンとなる
２つの導電性パターンの内いずれか一方は、第１の結合
パターンとなる２つの導電性パターンの両方と対向する
誘電体フィルタ。1. A coupling substrate, a resonator having a through-hole provided on the surface of the coupling substrate, a resonator fitting for electrically connecting the resonator and the coupling substrate, and a coating for the resonator. And a metal cover which is provided with a metal cover, and the combined substrate has a first combined pattern on the front surface of which two conductive patterns are provided so as to face each other, and two conductive patterns are provided on the rear surface of which oppositely face each other. A second bonding pattern, the two conductive patterns serving as the second bonding pattern of the bonding substrate face the two conductive patterns serving as the first bonding pattern, respectively, and One of the two conductive patterns serving as the coupling pattern of 1. is a dielectric filter that faces both of the two conductive patterns serving as the first coupling pattern.
ーンは、それぞれ対向する部分を櫛状にした請求項１記
載の誘電体フィルタ。2. The dielectric filter according to claim 1, wherein the two conductive patterns of the first coupling pattern have comb-shaped portions facing each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28095A JPH08186407A (en) | 1995-01-05 | 1995-01-05 | Dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28095A JPH08186407A (en) | 1995-01-05 | 1995-01-05 | Dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08186407A true JPH08186407A (en) | 1996-07-16 |
Family
ID=11469501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28095A Pending JPH08186407A (en) | 1995-01-05 | 1995-01-05 | Dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08186407A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008072537A (en) * | 2006-09-15 | 2008-03-27 | Soshin Electric Co Ltd | Delay filter |
-
1995
- 1995-01-05 JP JP28095A patent/JPH08186407A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008072537A (en) * | 2006-09-15 | 2008-03-27 | Soshin Electric Co Ltd | Delay filter |
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