JPH01209801A - Dielectric filter - Google Patents
Dielectric filterInfo
- Publication number
- JPH01209801A JPH01209801A JP3423588A JP3423588A JPH01209801A JP H01209801 A JPH01209801 A JP H01209801A JP 3423588 A JP3423588 A JP 3423588A JP 3423588 A JP3423588 A JP 3423588A JP H01209801 A JPH01209801 A JP H01209801A
- Authority
- JP
- Japan
- Prior art keywords
- dielectric
- coupling capacitor
- board
- return transmission
- 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
- 230000008878 coupling Effects 0.000 claims abstract description 35
- 238000010168 coupling process Methods 0.000 claims abstract description 35
- 238000005859 coupling reaction Methods 0.000 claims abstract description 35
- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims abstract 2
- 239000000758 substrate Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 238000001465 metallisation Methods 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 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
本発明は各種通信用機器などに利用される誘電体フィル
タに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a dielectric filter used in various communication devices.
従来の技術 従来の誘電体フィルタを第４図によって説明する。Conventional technology A conventional dielectric filter will be explained with reference to FIG.
誘電体同軸共振器１ ａ ＋ １ ｂ ＋ １ ’は誘
電体角筒からなり、開放端面以外の片端面 外周面およ
び内周面全体に電極２ａ、２ｂ、２ｃが銀メタライズ等
により施されている 誘電体同軸共振器１１Ｌ、１ｂ、
１０の内周には金属からなる中心金具３が挿入され半田
付は等で取り付けられている。The dielectric coaxial resonator 1 a + 1 b + 1 ' is made of a dielectric rectangular tube, and electrodes 2 a, 2 b, and 2 c are formed by silver metallization on one end surface other than the open end surface, and on the entire outer peripheral surface and inner peripheral surface. Dielectric coaxial resonator 11L, 1b,
A center fitting 3 made of metal is inserted into the inner periphery of 10 and attached by soldering or the like.
結合コンデンサ４は第６図４〜Ｃに示すようにアルミナ
のような高周波特性のすぐれた誘電体基板からなり誘電
体同軸共振器１ａ、１ｂ、”＋ｃの中心金具３および入
出力端子６との接続用の孔４Δ。As shown in FIGS. 6-4-C, the coupling capacitor 4 is made of a dielectric substrate with excellent high frequency characteristics such as alumina, and is connected to the center fitting 3 of the dielectric coaxial resonators 1a, 1b, ``+c'' and the input/output terminal 6. Hole 4Δ for connection.
４ｂが設けられている。入出力端子５との結合容量は結
合コンデンサ４の表裏の電極４ｃ、４ｄ間にて形成され
ている。また、誘電体同軸共振器１１Ｌ、１ｂ、１０間
の結合容量は結合コンデンサ４の同一表面に電極４０間
で形成されている。第４図において、誘電体同軸共振器
１２Ｌ、１ｂ、１Ｃは結合コンデンサ４の中央部に設け
られた孔４ｂに中心金具３を挿入し半田付けして、結合
コンデンサ４と接続している。同様にして、入出力端子
６が結合コンデンサ４の両端の孔４ａに挿入し半田付け
している。まだ、復伝送路として使用している同軸ケー
ブル６は結合容量７を介して結合コンデンサ４の電極４
ｃと接続された構造であった。4b is provided. A coupling capacitance with the input/output terminal 5 is formed between the front and back electrodes 4c and 4d of the coupling capacitor 4. Further, the coupling capacitance between the dielectric coaxial resonators 11L, 1b, and 10 is formed between the electrodes 40 on the same surface of the coupling capacitor 4. In FIG. 4, the dielectric coaxial resonators 12L, 1b, and 1C are connected to the coupling capacitor 4 by inserting a center metal fitting 3 into a hole 4b provided in the center of the coupling capacitor 4 and soldering it. Similarly, the input/output terminals 6 are inserted into the holes 4a at both ends of the coupling capacitor 4 and soldered. The coaxial cable 6, which is still being used as a return transmission line, is connected to the electrode 4 of the coupling capacitor 4 via the coupling capacitance 7.
It was a structure connected to c.
発明が解決しようとする課題
以上、説明した構造において、復伝送路として使用して
いる同軸ケーブル６は加工がむずかしく、長さを十分必
要とするため、フィルタ形状が大きくなるという問題が
あった。Problems to be Solved by the Invention As described above, in the structure described above, the coaxial cable 6 used as the return transmission line is difficult to process and requires a sufficient length, so there is a problem that the filter shape becomes large.
本発明はこのような問題点を解決するものであり、小型
で高性能のフィルタ特性をもつ誘電体フィルタを提供す
ることを目的とするものである。The present invention is intended to solve these problems, and aims to provide a dielectric filter that is compact and has high-performance filter characteristics.
課題を解決するだめの手段
上記課題を解決するために本発明の誘電体フィルタは、
ストリップ線路を有した誘電体基板よりなる復伝送路基
板を結合コンデンサと対向させた構成としだものである
。Means for Solving the Problems In order to solve the above problems, the dielectric filter of the present invention has the following features:
It has a configuration in which a return transmission line board made of a dielectric board having a strip line is opposed to a coupling capacitor.
作用
この技術的手段により、小形で簡単な構造の復伝送路を
有する誘電体フィルタを構成することとなる。Effect: By means of this technical means, a dielectric filter having a return transmission path with a small size and simple structure can be constructed.
実施例
以下、本発明の一実施例を添付図面にもとついて説明す
る。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.
第２図ａ −ｃは復伝送路基板１９を示すものであり、
この復伝送路基＆１９は高周波特性の優れた誘電体基板
８からなり接続端子２４を挿入するだめの孔９を設けて
いる。誘電体基板８の表面に、入力電極、出力電極を形
成するだめの電極１０ａ。FIGS. 2a to 2c show the return transmission line board 19,
This return transmission line base &19 is made of a dielectric substrate 8 having excellent high frequency characteristics, and is provided with a hole 9 into which a connecting terminal 24 is inserted. A second electrode 10a is formed on the surface of the dielectric substrate 8 to form an input electrode and an output electrode.
１０ｂ、ストリップ線路を形成するための電極１１が銀
メタライズ等により施されている。入力結合容量は入力
電極１０２Ｌとス） ＩＪツブ線路１１によ−）で形成
され、出力結合容量は出力電極１０ｂとストリップ線路
１１によって形成される。誘電体基板８の裏面に、アー
ス電極を形成するだめの電極１２が銀メタライズ等によ
り施されている。10b, an electrode 11 for forming a strip line is formed by silver metallization or the like. The input coupling capacitance is formed by the input electrode 102L and the IJ tube line 11, and the output coupling capacitance is formed by the output electrode 10b and the strip line 11. A second electrode 12 forming a ground electrode is provided on the back surface of the dielectric substrate 8 by silver metallization or the like.
第３図ａ −ｃは結合コンデンサ２０を示すものであり
、結合コンデンサ２０はアルミナのような高周波特性の
すぐれた誘電体基板１３からなり中心金具２２を挿入す
るだめの孔１４、接続端子２４を挿入するだめの孔１６
および入出力端子２３を挿入するだめの孔１６を設けて
いる。また、誘電体基板１３の表面には、結合容量を形
成するだめの電極１７１Ｌ 、 １７ｂ 、 Ｉ Ｔｏ
が銀メタライズ等により施されている。誘電体同軸共振
器と入出力端子の結合容量は表裏の電極間１７＆および
１了Ｃと１８＆および１８ｂによって形成される。誘電
体同軸共振器間の結合容量は同一表面の電極間１７＋ａ
と１７ｂ１１７ｂと１７０によって形成される。第１図
は上記復伝送路基板１９と結合コンデンサ２ｏを用いて
、３段の誘電体フィルタを構成した場合の断面図である
。誘電体同軸共振器２１ａ、２１ｂ、２１ｃは誘電体角
筒からなり、開放端面以外の片端面、外周面および内周
面全体には銀メタライズ等が施されている。誘電体同ｌ
ｌｌ１ｊ］共振器２１ ａ 、 ２１ ｂ 、 ２１
ｃと結合コンデンサ２ｏを接続するための金属から成る
中心金属２２が誘電体同軸共振器２１ａ、２１ｂ、２１
ｃの内部導体および結合コンデンサ２ｏの孔１４にそれ
ぞれ挿入されて半田付けされている。金属からなる入出
力端子２３は、結合コンデンサ２０の孔１６、に挿入さ
れて半田付けされている。結合コンデンサ２ｏと復伝送
路基板１９を接続するために、金属から成る接続金具２
４が結合コンデンサ２０の孔１６および復伝送路基版１
９の孔９にそれぞれ挿入されて半田付けされて構成され
ている。3a to 3c show a coupling capacitor 20. The coupling capacitor 20 is made of a dielectric substrate 13 with excellent high frequency characteristics such as alumina, and has a hole 14 into which a center fitting 22 is inserted, and a connecting terminal 24. Hole 16 for insertion
and a hole 16 into which the input/output terminal 23 is inserted. Further, on the surface of the dielectric substrate 13, there are electrodes 171L, 17b, and I To that form coupling capacitance.
is applied by silver metallization etc. The coupling capacitance between the dielectric coaxial resonator and the input/output terminal is formed by the front and back electrodes 17&, 1, 1, 18&, and 18b. The coupling capacitance between dielectric coaxial resonators is 17+a between electrodes on the same surface.
and 17b117b and 170. FIG. 1 is a sectional view of a three-stage dielectric filter constructed using the above-mentioned return transmission line board 19 and coupling capacitor 2o. The dielectric coaxial resonators 21a, 21b, and 21c are made of dielectric rectangular tubes, and one end surface other than the open end surface, the entire outer peripheral surface, and the entire inner peripheral surface are coated with silver metallization or the like. Dielectric material
ll1j] Resonators 21 a , 21 b , 21
The center metal 22 made of metal for connecting the coupling capacitor 2o to the dielectric coaxial resonators 21a, 21b, 21
c and the hole 14 of the coupling capacitor 2o, respectively, and are soldered thereto. The input/output terminal 23 made of metal is inserted into the hole 16 of the coupling capacitor 20 and soldered. A metal connecting fitting 2 is used to connect the coupling capacitor 2o and the return transmission line board 19.
4 is the hole 16 of the coupling capacitor 20 and the return transmission line base plate 1
9, and are inserted into the holes 9 and soldered to each other.
発明の効果
以上のように本発明によれば、ストリップ線路を有した
誘電体基板よりなる復伝送路基板を結合コンデンづと対
向させた構成とすることにより、小型で高性能の誘電体
フィルタを提供することができるという効果が得られる
。Effects of the Invention As described above, according to the present invention, a small and high-performance dielectric filter can be produced by configuring a return transmission line board made of a dielectric board having a strip line and facing a coupling capacitor. The effect is that it can be provided.
第１図は本発明の一実施例にお・ける誘電体フィルタの
断面図、第２図ａ −ｃは本発明の一実施例における復
伝送路基板の上面図、側面図および下面図、第３図ａＺ
Ｃは本発明の一実施例における結合コンデンサの上面図
、側面図および下面図、第４図に従来例における誘電体
フィルタの斜視図、第６図ａ ／’−／ Ｃは従来例に
よる結合コンデンサの上面図、側面図および下面図を示
す。
８・・・・・・誘電体基板、９・・・・・・孔、１０ａ
、１０ｂ。
１１．１２・・・・・・電極、１３・・・・・・誘電体
基板、１４゜１５ 、１６・・−・・孔、１７＆〜Ｃ１
１８ａＮｂ・・・・・・電極、１９・・・・・・復伝送
路基板、２ｏ・・・・・・結合コンデンサ、２１２ＬＮ
Ｃ・・・・・・誘電体同軸共振器、２２・・・・・・中
心金具、２３・・・・・・入出力端子、２４・・・・・
・接続金具。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名１９
− 複伝乏路基板
２０− 緒舎コンナンサ
２４−・−擾禮全具
σ）
恢
サ −Ｎ４駅FIG. 1 is a sectional view of a dielectric filter according to an embodiment of the present invention, and FIGS. Figure 3 aZ
C is a top view, side view, and bottom view of a coupling capacitor according to an embodiment of the present invention, FIG. 4 is a perspective view of a dielectric filter in a conventional example, and FIG. 6 a /'-/ C is a coupling capacitor according to a conventional example. A top view, a side view and a bottom view are shown. 8... Dielectric substrate, 9... Hole, 10a
, 10b. 11.12... Electrode, 13... Dielectric substrate, 14゜15, 16... Hole, 17&~C1
18aNb...Electrode, 19...Return transmission line board, 2o...Coupling capacitor, 212LN
C...Dielectric coaxial resonator, 22... Center metal fitting, 23... Input/output terminal, 24...
・Connection fittings. Name of agent: Patent attorney Toshio Nakao and 1 other person19
− Double transmission circuit board 20 − Osha connancer 24 −・−Kanrei all tools σ) Kōsa −N4 station
Claims (3)
を施した複数個の１／４波長誘電体同軸共振器に容量電
極を有する誘電体基板よりなる結合コンデンサを介して
電気的に接続し、上記結合コンデンサに対向して、スト
リップ線路を有した誘電体基板よりなる復伝送路基板を
配置し、前記ストリップ線路の両端と前記容量電極と接
続して一体化した誘電体フィルタ。(1) Electrical connection is made through a coupling capacitor made of a dielectric substrate with a capacitive electrode to multiple 1/4 wavelength dielectric coaxial resonators each having a conductor on one end surface other than the open end surface, the outer circumferential surface, and the inner circumferential surface. A dielectric filter is provided, in which a return transmission line board made of a dielectric board having a strip line is arranged opposite to the coupling capacitor, and both ends of the strip line and the capacitor electrode are connected and integrated.
伝送路基板を接続した請求項１記載の誘電体フィルタ。(2) The dielectric filter according to claim 1, wherein the capacitance electrode of the coupling capacitor and the return transmission line board are connected via a connecting terminal.
路基板を一体化したものをケースに納め、ケースと復伝
送路基板のアース面を接着した請求項１記載の誘電体フ
ィルタ。(3) The dielectric filter according to claim 1, wherein the dielectric coaxial resonator, the coupling capacitor, and the return transmission line board are integrated into a case, and the ground plane of the case and the return transmission line board are bonded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3423588A JPH01209801A (en) | 1988-02-17 | 1988-02-17 | Dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3423588A JPH01209801A (en) | 1988-02-17 | 1988-02-17 | Dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01209801A true JPH01209801A (en) | 1989-08-23 |
Family
ID=12408489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3423588A Pending JPH01209801A (en) | 1988-02-17 | 1988-02-17 | Dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01209801A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03292002A (en) * | 1990-04-10 | 1991-12-24 | Matsushita Electric Ind Co Ltd | Dielectric filter |
| EP0571094A2 (en) * | 1992-04-30 | 1993-11-24 | NGK Spark Plug Co. Ltd. | Dielectric filter device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5372549A (en) * | 1976-12-10 | 1978-06-28 | Nec Corp | Microwave polarized type band pass filter |
| JPS5761313A (en) * | 1980-09-30 | 1982-04-13 | Matsushita Electric Ind Co Ltd | Band-pass filter for ultra-high frequency |
| JPS6223202A (en) * | 1985-07-23 | 1987-01-31 | Murata Mfg Co Ltd | Containing structure for electronic parts |
| JPS62241402A (en) * | 1986-04-14 | 1987-10-22 | Matsushita Electric Ind Co Ltd | Filter device |
| JPS62241403A (en) * | 1986-04-14 | 1987-10-22 | Matsushita Electric Ind Co Ltd | Dielectric filter |
-
1988
- 1988-02-17 JP JP3423588A patent/JPH01209801A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5372549A (en) * | 1976-12-10 | 1978-06-28 | Nec Corp | Microwave polarized type band pass filter |
| JPS5761313A (en) * | 1980-09-30 | 1982-04-13 | Matsushita Electric Ind Co Ltd | Band-pass filter for ultra-high frequency |
| JPS6223202A (en) * | 1985-07-23 | 1987-01-31 | Murata Mfg Co Ltd | Containing structure for electronic parts |
| JPS62241402A (en) * | 1986-04-14 | 1987-10-22 | Matsushita Electric Ind Co Ltd | Filter device |
| JPS62241403A (en) * | 1986-04-14 | 1987-10-22 | Matsushita Electric Ind Co Ltd | Dielectric filter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03292002A (en) * | 1990-04-10 | 1991-12-24 | Matsushita Electric Ind Co Ltd | Dielectric filter |
| EP0571094A2 (en) * | 1992-04-30 | 1993-11-24 | NGK Spark Plug Co. Ltd. | Dielectric filter device |
| EP0740360A2 (en) * | 1992-04-30 | 1996-10-30 | Ngk Spark Plug Co., Ltd. | Dielectric filter device |
| EP0740360A3 (en) * | 1992-04-30 | 1996-12-04 | Ngk Spark Plug Co |
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