JPH0262101A - Dielectric filter - Google Patents
Dielectric filterInfo
- Publication number
- JPH0262101A JPH0262101A JP21390688A JP21390688A JPH0262101A JP H0262101 A JPH0262101 A JP H0262101A JP 21390688 A JP21390688 A JP 21390688A JP 21390688 A JP21390688 A JP 21390688A JP H0262101 A JPH0262101 A JP H0262101A
- Authority
- JP
- Japan
- Prior art keywords
- parallel
- capacitor
- filter device
- coupling capacitor
- dielectric resonators
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 32
- 230000008878 coupling Effects 0.000 abstract description 17
- 238000010168 coupling process Methods 0.000 abstract description 17
- 238000005859 coupling reaction Methods 0.000 abstract description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000758 substrate Substances 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
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、自動車−程話などの通信システムに用いられ
る誘電体フィルタに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dielectric filter used in communication systems such as automobiles and electronic devices.
従来の技術
従来、この種のフィルタ装置は、第９図、第１０図に示
されるように、誘電体共振器３、アルミナ結合基板２１
、中心金具１９、入出力端子１を備え、所定帯域のフィ
ルタ特性を得るために誘電体共振器３を中心金具１９を
介してアルミナ結合基板２１上のコンデンサ２で並列接
続していた。2. Description of the Related Art Conventionally, this type of filter device has a dielectric resonator 3, an alumina bonding substrate 21, as shown in FIGS. 9 and 10.
, a center metal fitting 19, and an input/output terminal 1, and a dielectric resonator 3 was connected in parallel with a capacitor 2 on an alumina bonded substrate 21 via the center metal fitting 19 in order to obtain filter characteristics in a predetermined band.
発明が解決しようとする課題
しかしながら、上記従来のフィルタ装置では、高減衰量
を確保するためには、当然のこととして多数の誘電体共
振器３を必要とし、大型化してしまうものであった。そ
こで各誘電体共振器３を小さくして小型化を図ろうとし
ても誘電体共振器３を小さくすると誘電率を大きくしな
ければならないので、その分Ｑが劣化しその結果として
帯域内挿入損失が大きくなり、結論としてフィルタ装置
を小型化することができないという問題点があった。Problems to be Solved by the Invention However, in the conventional filter device described above, in order to ensure a high amount of attenuation, a large number of dielectric resonators 3 are naturally required, resulting in an increase in size. Therefore, even if an attempt is made to downsize each dielectric resonator 3, if the dielectric resonator 3 is made smaller, the dielectric constant must be increased, so the Q deteriorates by that amount, and as a result, the in-band insertion loss increases. As a result, there was a problem that the filter device could not be made smaller.
本発明はこのような従来の問題点を解決するものであり
、小型化および高性能化できる優れたフィルタ装置を提
供することを目的とするものである。The present invention solves these conventional problems, and aims to provide an excellent filter device that can be made smaller and have higher performance.
課題を解決するだめの手段
本発明は上記目的を達成するために複数の誘電体共振器
を第１のコンデンサで並列接続するとともに、上記第１
のコンデンサに対し、第２のコンデンサまたはインダク
タンスを並列接続するようにしたものである。Means for Solving the Problems In order to achieve the above object, the present invention connects a plurality of dielectric resonators in parallel using a first capacitor, and
A second capacitor or inductance is connected in parallel to the capacitor.
作用
したがって、本発明によれば従来のフィルタ装置の結合
用の第１のコンデンサに対して、第２のコンデンサまた
はインダクタンスを並列接続することによって、従来の
技術のフィルタ波形の減衰帯域においてノツチフィルタ
を構成したようになって高減衰量を確保しやすくなるた
め、少数の誘電体共振器でフィルタ装置を構成でき、ま
た各誘電体共振器を小さくしても、従来の技術のフィル
タ装置にくらべて同性能もしくは高性能なフィルタ装置
を構成することができるので、結論として小型のフィル
タ装置を提供できるものとなる。Therefore, according to the present invention, by connecting a second capacitor or inductance in parallel to the first coupling capacitor of the conventional filter device, the notch filter can be used in the attenuation band of the filter waveform of the conventional filter device. This structure makes it easier to ensure high attenuation, so the filter device can be configured with a small number of dielectric resonators, and even if each dielectric resonator is small, it is still more efficient than conventional filter devices. Since it is possible to configure a filter device with the same performance or high performance, it is possible to provide a compact filter device.
実施例
第１図と第７図は、本発明の一実施例の構成を示すもの
であり、複数の誘電体共振器３を中心金具１９を介して
アルミナ結合基板１８上に構成された結合コンデンサ２
で並列接続するとともに、結合コンテ゛ンサ２に対し、
アルミナ結合基板１８上に構成された有極コンデンサ４
を並列接続している。Embodiment FIGS. 1 and 7 show the configuration of an embodiment of the present invention, in which a plurality of dielectric resonators 3 are connected to a coupling capacitor constructed on an alumina bonding substrate 18 via a central metal fitting 19. 2
and connect in parallel with coupling capacitor 2,
Polar capacitor 4 configured on alumina bonded substrate 18
are connected in parallel.
次に上記実施例について説明する。上記実施例において
、有極コンデンサ４を結合コンデンサ２に対して並列接
続することにおいて、第５図（ａ）に示される点線１ｏ
のように従来の技術の波形９に対してノツチフィルタを
構成したように極６が形成され高減衰量を確保しやすく
なる。このため、少数の誘電体共振器３でフィルタ装置
を構成したり、各誘電体共振器３を小さくしても従来の
技術のフィルタ装置にくらべて同性能もしくは、高性能
なフィルタ装置を構成することができる。なお７は通過
帯域を示す。Next, the above embodiment will be explained. In the above embodiment, when connecting the polar capacitor 4 in parallel to the coupling capacitor 2, the dotted line 1o shown in FIG.
The pole 6 is formed as if a notch filter was constructed for the waveform 9 of the prior art, making it easier to ensure a high attenuation amount. Therefore, even if a filter device is configured with a small number of dielectric resonators 3 or each dielectric resonator 3 is made small, it is possible to configure a filter device with the same performance or higher performance than the filter device of the conventional technology. be able to. Note that 7 indicates a pass band.
第２図、第８図は、本発明の他の実施例の構成を示すも
のであり、複数の誘電体共振器３を中心金具１９を介し
てアルミナ結合基板２ｏ上に構成された結合コンデンサ
２で並列接続するとともに結合コンデンサ２に対し、ア
ルミナ結合基板２゜上で有極インダクタンスを６を並列
接続されている。2 and 8 show the configuration of another embodiment of the present invention, in which a plurality of dielectric resonators 3 are connected to a coupling capacitor 2 formed on an alumina bonded substrate 2o via a central metal fitting 19. A polarized inductance 6 is connected in parallel to the coupling capacitor 2 on the alumina bonding substrate 2°.
次に上記実施例について説明する。上記実施例において
、有極インダクタンス５を結合コンデンサ２に対して並
列接続することにおいて、第６図（ｂ）に示される点線
１１のように従来の技術の波形９に対してノツチフィル
タを構成したように極８が形成され高減衰量を確保しや
すくなる。このため、少数の誘電体共振器３でフィルタ
装置を構成したシ、各誘電体共振器を小さくしても従来
の技術のフィルタ装置にくらべて同性能もしくは、高性
能なフィルタ装置を構成することが可能となる。Next, the above embodiment will be explained. In the above embodiment, by connecting the polarized inductance 5 in parallel to the coupling capacitor 2, a notch filter was constructed for the waveform 9 of the conventional technique as indicated by the dotted line 11 shown in FIG. 6(b). Since the pole 8 is formed in this manner, it becomes easier to ensure a high attenuation amount. Therefore, if a filter device is configured with a small number of dielectric resonators 3, it is possible to configure a filter device with the same performance or higher performance than the filter device of the conventional technology even if each dielectric resonator is made smaller. becomes possible.
第３図、第４図は上記二種の実施例の応用であり第６図
（ａ） 、 （ｂ）に示されるような波形をもつ。3 and 4 are applications of the above two embodiments, and have waveforms as shown in FIGS. 6(a) and 6(b).
第３図は、結合コンデンサ２に対して有極コンデンサ４
を２箇所に並列接続、することにより、−第６図（ａ）
に示される点線１４のように従来の技術の波形９に対し
て２段のノツチフィルタを構成したように極１２．極１
３が形成され第２図に示される実施例よりもさらに高減
衰量を確保することが可能となる。Figure 3 shows the polarized capacitor 4 for the coupling capacitor 2.
By connecting in parallel at two places, -Figure 6 (a)
As shown by the dotted line 14 shown in FIG. pole 1
3 is formed, making it possible to secure an even higher attenuation than the embodiment shown in FIG.
第４図は、結合コンデンサ２に対して有極インダクタン
ス６を２箇所に並列接続することにより第６図φ）に示
されるように［１５、極１６が形成され、第３図に示さ
れる実施例よりもさらに高減衰量を確保することが可能
となる。FIG. 4 shows that by connecting the polarized inductance 6 in two places in parallel to the coupling capacitor 2, the poles 15 and 16 are formed as shown in FIG. It becomes possible to secure even higher attenuation than in the example.
発明の効果
本発明は、上記実施例よシ明らかなように、誘電体共振
器を並列接続した第１のコンデンサに対してコンデンサ
またはインダクタンスを並列接続したものであるので、
フィルタ装置としての減衰量を確保した上で、小型化で
きるものとなる。Effects of the Invention As is clear from the above embodiments, the present invention is one in which a capacitor or an inductance is connected in parallel to a first capacitor in which a dielectric resonator is connected in parallel.
While ensuring the amount of attenuation as a filter device, it can be made smaller.
第１図は本発明の一実施例におけるフィルタ装置の回路
図、第５図（ＩＬ）は同装置と従来のフィルタ装置の伝
送特性を示した特性図、第７図は同装置の正面図、第２
図は本発明の他の一実施例におけるフィルタ装置の回路
図、第５図（′ｂ）は同装置と従来のフィルタ装置の伝
送特性を示した特性図、第８図は同装置の正面図、第３
図、第４図はそれぞれ本発明の他の実施例を示す回路図
、第６図Ｃ＆）。
（′ｂ）はそれぞれの伝送特性図、第９図は従来例の回
路図、第１０図はその正面図である。
２・・・・・・結合コンデンサ、３・・・・・・誘電体
共振器、４・・・・・・有極コンデンサ、
・・有極インダクタンス。FIG. 1 is a circuit diagram of a filter device according to an embodiment of the present invention, FIG. 5 (IL) is a characteristic diagram showing the transmission characteristics of the same device and a conventional filter device, and FIG. 7 is a front view of the same device. Second
The figure is a circuit diagram of a filter device according to another embodiment of the present invention, FIG. 5('b) is a characteristic diagram showing the transmission characteristics of the same device and a conventional filter device, and FIG. 8 is a front view of the same device. , 3rd
4 and 4 are circuit diagrams showing other embodiments of the present invention, and FIG. 6C&), respectively. ('b) is a respective transmission characteristic diagram, FIG. 9 is a circuit diagram of a conventional example, and FIG. 10 is a front view thereof. 2...Coupling capacitor, 3...Dielectric resonator, 4...Polarized capacitor,...Polarized inductance.
Claims (1)
るとともに、上記第１のコンデンサに対し、第２のコン
デンサまたはインダクタンスを並列に接続した誘電体フ
ィルタ。A dielectric filter in which a plurality of dielectric resonators are connected in parallel with a first capacitor, and a second capacitor or an inductance is connected in parallel with the first capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63213906A JPH0734521B2 (en) | 1988-08-29 | 1988-08-29 | Dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63213906A JPH0734521B2 (en) | 1988-08-29 | 1988-08-29 | Dielectric filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0262101A true JPH0262101A (en) | 1990-03-02 |
| JPH0734521B2 JPH0734521B2 (en) | 1995-04-12 |
Family
ID=16646983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63213906A Expired - Lifetime JPH0734521B2 (en) | 1988-08-29 | 1988-08-29 | Dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734521B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03209901A (en) * | 1990-01-12 | 1991-09-12 | Matsushita Electric Ind Co Ltd | Dielectric filter |
| JPH04801A (en) * | 1990-04-17 | 1992-01-06 | Murata Mfg Co Ltd | Band pass filter |
| US5196813A (en) * | 1991-07-23 | 1993-03-23 | Matsushita Electric Industrial Co., Ltd. | Dielectric filter having a single multilayer substrate |
| JPH06104605A (en) * | 1992-09-24 | 1994-04-15 | Nippon Dengiyou Kosaku Kk | Band pass filter |
| JPH06334407A (en) * | 1993-05-19 | 1994-12-02 | Matsushita Electric Ind Co Ltd | Dielectric filter |
| JPH06334406A (en) * | 1993-05-19 | 1994-12-02 | Matsushita Electric Ind Co Ltd | Dielectric filter |
| US5448209A (en) * | 1993-03-31 | 1995-09-05 | Ngk Insulators, Ltd. | Laminated dielectric filter |
| JP2006311306A (en) * | 2005-04-28 | 2006-11-09 | Kyocera Corp | Band pass filter, high frequency module and radio communication equipment using the same |
| EP1643584B1 (en) * | 2004-09-30 | 2009-09-09 | Taiyo Yuden Co., Ltd. | Balanced filter device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6251803A (en) * | 1985-08-30 | 1987-03-06 | Murata Mfg Co Ltd | Microwave filter |
| JPS62159501A (en) * | 1986-01-04 | 1987-07-15 | Nippon Dengiyou Kosaku Kk | Polar type band pass filter |
| JPS62243402A (en) * | 1986-04-15 | 1987-10-23 | Murata Mfg Co Ltd | Dielectric filter |
| JPS6324702A (en) * | 1986-07-16 | 1988-02-02 | Murata Mfg Co Ltd | Filter device |
-
1988
- 1988-08-29 JP JP63213906A patent/JPH0734521B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6251803A (en) * | 1985-08-30 | 1987-03-06 | Murata Mfg Co Ltd | Microwave filter |
| JPS62159501A (en) * | 1986-01-04 | 1987-07-15 | Nippon Dengiyou Kosaku Kk | Polar type band pass filter |
| JPS62243402A (en) * | 1986-04-15 | 1987-10-23 | Murata Mfg Co Ltd | Dielectric filter |
| JPS6324702A (en) * | 1986-07-16 | 1988-02-02 | Murata Mfg Co Ltd | Filter device |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03209901A (en) * | 1990-01-12 | 1991-09-12 | Matsushita Electric Ind Co Ltd | Dielectric filter |
| JPH04801A (en) * | 1990-04-17 | 1992-01-06 | Murata Mfg Co Ltd | Band pass filter |
| US5202653A (en) * | 1990-04-17 | 1993-04-13 | Murata Manufacturing Co., Ltd. | Band-pass filter including resonance elements coupled by a coupling line and a by-pass coupling line |
| US5196813A (en) * | 1991-07-23 | 1993-03-23 | Matsushita Electric Industrial Co., Ltd. | Dielectric filter having a single multilayer substrate |
| JPH06104605A (en) * | 1992-09-24 | 1994-04-15 | Nippon Dengiyou Kosaku Kk | Band pass filter |
| US5448209A (en) * | 1993-03-31 | 1995-09-05 | Ngk Insulators, Ltd. | Laminated dielectric filter |
| JPH06334407A (en) * | 1993-05-19 | 1994-12-02 | Matsushita Electric Ind Co Ltd | Dielectric filter |
| JPH06334406A (en) * | 1993-05-19 | 1994-12-02 | Matsushita Electric Ind Co Ltd | Dielectric filter |
| EP1643584B1 (en) * | 2004-09-30 | 2009-09-09 | Taiyo Yuden Co., Ltd. | Balanced filter device |
| US7868718B2 (en) | 2004-09-30 | 2011-01-11 | Taiyo Yuden, Co., Ltd. | Balanced filter device |
| JP2006311306A (en) * | 2005-04-28 | 2006-11-09 | Kyocera Corp | Band pass filter, high frequency module and radio communication equipment using the same |
| JP4523478B2 (en) * | 2005-04-28 | 2010-08-11 | 京セラ株式会社 | Band-pass filter, high-frequency module, and wireless communication device using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0734521B2 (en) | 1995-04-12 |
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