JPH0451602A - Dielectric filter - Google Patents

Dielectric filter

Info

Publication number
JPH0451602A
JPH0451602A JP16094290A JP16094290A JPH0451602A JP H0451602 A JPH0451602 A JP H0451602A JP 16094290 A JP16094290 A JP 16094290A JP 16094290 A JP16094290 A JP 16094290A JP H0451602 A JPH0451602 A JP H0451602A
Authority
JP
Japan
Prior art keywords
short
input
end surface
resonator holes
face
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
Application number
JP16094290A
Other languages
Japanese (ja)
Inventor
Tadahiro Yorita
寄田 忠弘
Hirobumi Miyamoto
博文 宮本
Motoharu Hiroshima
基晴 広嶋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP16094290A priority Critical patent/JPH0451602A/en
Publication of JPH0451602A publication Critical patent/JPH0451602A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To reduce cost, to improve productivity and to lower mounting height by respectively forming input/output electrodes in places confronted with resonator holes in initial and final stages on a confronted end surface and capacitance-connecting the input/output electrodes and the internal conductors of the resonator holes in the initial and final stages. CONSTITUTION:A short-side end surface 3 formed on one end surface of a dielectric block 2, at least two resonator holes 5 which are piercingly provided from the short- side end surface 3 towards the confronted end surface 4 with bottoms and which are arranged in parallel, the internal conductors 6 formed on the whole internal surfaces of the resonator holes 5, external conductors 7 formed on the whole side periphery of the dielectric block 2 and a short electrode film 8 which is formed on the short-side end surface 3 and which shorts the internal conductors 6 and the external conductors 7. The input/output electrodes 10 are formed in the places confronted with the resonator holes 5 in the initial and final stages on the confronted end surface 4. The input/output electrodes 10 are capacitance-connected with the internal conductors 6 of the resonator holes 5 in the initial and final stages and a dielectric filter 1 is constituted. Thus, the cost can be reduced, productivity can be improved and surface mounting can be executed.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、共振器孔を有する誘電体ブロックから構成し
た誘電体フィルタに係り、特に二つ以上の共振器孔を有
する誘電体フィルタに関する。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a dielectric filter constructed from a dielectric block having resonator holes, and particularly to a dielectric filter having two or more resonator holes.

〈従来の技術〉 一般に、この種の誘電体フィルタとしては、例えば、第
6図に示すようなλ/4型のものが知られている。この
誘電体フィルタ40は、セラミック等の誘電体材料から
なる誘電体ブロック41を備えている。この誘電体ブロ
ック41は、図中、上側の端面が短絡側端面42、下側
の端面が開放側端面43とされ、これら両端面42.4
3間に貫通孔からなる共振器孔44が二つ互いに並列に
形成されている。共振器孔44の内周面には内導体45
が形成されており、また、誘電体ブロック41の側面全
周には外導体46が形成されている。
<Prior Art> Generally, as this type of dielectric filter, for example, a λ/4 type filter as shown in FIG. 6 is known. This dielectric filter 40 includes a dielectric block 41 made of a dielectric material such as ceramic. In the figure, this dielectric block 41 has an upper end face as a short-circuit side end face 42 and a lower end face as an open side end face 43, and both end faces 42.4
Two resonator holes 44, each consisting of a through hole, are formed in parallel to each other. An inner conductor 45 is provided on the inner peripheral surface of the resonator hole 44.
is formed, and an outer conductor 46 is formed around the entire side surface of the dielectric block 41.

短絡側端面42には、内導体45と外導体46とを短絡
する短絡電極膜47が形成されている。これによって共
振器孔44毎に共振素子が構成されている。共振器孔4
4.44の間には、各共振器孔44を結合するための結
合孔48が形成されている。そして、誘電体フィルタ4
0には、アース接続および磁束漏れ防止のために金属ケ
ース49が取り付けられている。
A short-circuit electrode film 47 that short-circuits the inner conductor 45 and the outer conductor 46 is formed on the short-circuit side end surface 42 . As a result, a resonant element is configured for each resonator hole 44. Resonator hole 4
A coupling hole 48 for coupling each resonator hole 44 is formed between 4.44 and 4.44. And dielectric filter 4
A metal case 49 is attached to 0 for ground connection and prevention of magnetic flux leakage.

このような誘電体フィルタ40においては、外部回路と
は容量結合(いわゆるQe容量)によって接続される。
Such a dielectric filter 40 is connected to an external circuit through capacitive coupling (so-called Qe capacitance).

そこで、従来例では、入出力用の樹脂ピン50を用いて
外部回路と接続している。
Therefore, in the conventional example, resin pins 50 for input/output are used to connect to an external circuit.

樹脂ビン50は、金属ピン50aを樹脂で被覆して構成
されており、開放側端面43から初段および最終段の共
振器孔44に挿入固定されて内導体45と容量結合する
ようになっている。そして、この樹脂ビン50の金属ピ
ン51a先端部が外部回路(例えば、回路基板51)の
配線パターンのスルーホール(図示せず)に挿入されて
その裏面側で半田付けされる。これにより外部回路との
接続がなされる。また、アース接続は、金属ケース49
を介して外導体46と回路基板51のアースパターン(
図示U−ず)とを接続することによって行われる。
The resin bottle 50 is constructed by coating a metal pin 50a with resin, and is inserted and fixed into the first and final stage resonator holes 44 from the open side end face 43 so as to be capacitively coupled to the inner conductor 45. . The tip of the metal pin 51a of this resin bottle 50 is inserted into a through hole (not shown) of a wiring pattern of an external circuit (eg, circuit board 51) and soldered on the back side thereof. This establishes a connection with an external circuit. Also, the ground connection is made using the metal case 49.
The ground pattern of the outer conductor 46 and the circuit board 51 (
This is done by connecting the

〈発明が解決してようとする課題〉 ところで、従来の誘電体フィルタ40においては、入出
力用として樹脂ピン50を用いねばならない。そのため
、その分、部品点数が増加してコストを上昇させるとい
う問題があった。
<Problems to be Solved by the Invention> By the way, in the conventional dielectric filter 40, resin pins 50 must be used for input and output. Therefore, there is a problem in that the number of parts increases accordingly, leading to an increase in cost.

また、別部品である樹脂ピン50を誘電体ブロック41
に取り付ける作業が必要であり、そのうえ、その作業は
、手作業によって行わねばならず、量産性が悪かった。
In addition, the resin pin 50, which is a separate part, is attached to the dielectric block 41.
Further, this work had to be done manually, making it difficult to mass-produce.

さらに、最近の電子部品においては、実装の高密度化要
求に伴い、表面実装できることか求められてきており、
誘電体フィルタにおいても同様の要求がでてきている。
Furthermore, in recent years electronic components are required to be able to be surface mounted due to the demand for higher density mounting.
Similar demands have been made for dielectric filters as well.

ところが、上記従来例においては、外部回路との接続は
、樹脂ピン50を介して行っており、表面実装すること
は構造上困難であった。
However, in the conventional example described above, the connection with the external circuit is made through the resin pin 50, and surface mounting is structurally difficult.

本発明は、このような事情に鑑みてなされたものであっ
て、コストが低減できるとともに、量産性も向上させる
ことができ、そのうえ、表面実装も可能な誘電体フィル
タを提供することを目的としている。
The present invention was made in view of the above circumstances, and an object of the present invention is to provide a dielectric filter that can reduce costs, improve mass productivity, and also be surface-mountable. There is.

く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、誘電体ブロック
の一端面に形成された短絡側端面と、短絡側端面から対
向端面に向かって有底状に穿設され、かつ、互いに並列
に配置された少なくとも二つの共振器孔と、共振器孔の
内面全面に形成された内導体と、誘電体ブロックの側面
全周に形成された外導体と、短絡側端面上に形成されて
内導体、外導体を短絡する短絡電極膜とを備え、前記対
向端面には、初段および最終段の共振器孔と対向した位
置に入出力用電極がそれぞれ形成されているとともに、
この入出力用電極と初段および最終段の共振器孔の内導
体とは、容量結合して誘電体フィルタを構成した。
Means for Solving the Problems> In order to achieve the above object, the present invention includes a short-circuit side end face formed on one end face of a dielectric block, and a bottomed hole formed from the short-circuit side end face toward the opposite end face. at least two resonator holes arranged in parallel with each other, an inner conductor formed on the entire inner surface of the resonator hole, an outer conductor formed on the entire side surface of the dielectric block, and a short-circuit side. A shorting electrode film is formed on the end face to short-circuit the inner conductor and the outer conductor, and input/output electrodes are formed on the opposite end faces at positions facing the resonator holes of the first stage and the final stage, respectively. With,
The input/output electrodes and the inner conductors of the first and final stage resonator holes were capacitively coupled to form a dielectric filter.

く作用〉 上記構成によれば、誘電体ブロック表面に形成した入出
力用電極と初段および最終段の共振孔の内導体との間に
生じる誘電体ブロック内部容量が外部回路との間の結合
容量となる。そのたぬ、外部回路との接続は、この入出
力用電極によって行えるようになる。
According to the above configuration, the internal capacitance of the dielectric block generated between the input/output electrodes formed on the surface of the dielectric block and the inner conductors of the resonance holes of the first and final stages becomes the coupling capacitance with the external circuit. becomes. Furthermore, connection to an external circuit can be made through these input/output electrodes.

また、外導体形成面である側面を外部回路への取り付は
面とすることができるので、外導体を外部回路のアース
パターンに直接接続することによってアース接続ができ
るできるようになる。
Furthermore, since the side surface, which is the surface on which the outer conductor is formed, can be attached to the external circuit as a surface, the outer conductor can be connected to the ground by directly connecting it to the ground pattern of the external circuit.

〈実施例〉 以下、本発明を図面に示す実施例に基づいて、詳細に説
明する。第1図は、本発明の一実施例の断面図、第2図
はその斜視図である。
<Example> Hereinafter, the present invention will be described in detail based on an example shown in the drawings. FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a perspective view thereof.

この誘電体フィルタlは、セラミック等の誘電体材料か
らなる誘電体ブロック2を備えている。
This dielectric filter 1 includes a dielectric block 2 made of a dielectric material such as ceramic.

この誘電体ブロック2は、図中、上側の端面が短絡側端
面3とされている。そして、短絡側端面3から対抗端面
4に向かって有底状の共振器孔5が二つ互いに並列に穿
設されている。各共振器孔5の内周面全面には内導体6
が形成されている。また、誘電体ブロック2の側面全周
には外導体7が形成されている。短絡側端面3には、内
導体6と外導体7とを短絡する短絡電極膜8が形成され
ている。これによって共振器孔5毎に計二つの共振素子
が構成されている。なお、共振器孔5の間には、共振器
孔5.5を結合させるスリット9が形成されている。な
お、スリット9は、第1図に示すように短絡側端面3に
形成してもよいし、第3図に示すように対向端面4に形
成してもよい。
The dielectric block 2 has an upper end face as a short-circuit side end face 3 in the figure. Two bottomed resonator holes 5 are bored in parallel with each other from the short-circuit side end surface 3 toward the opposing end surface 4. An inner conductor 6 is provided on the entire inner peripheral surface of each resonator hole 5.
is formed. Further, an outer conductor 7 is formed around the entire side surface of the dielectric block 2. A short-circuit electrode film 8 that short-circuits the inner conductor 6 and the outer conductor 7 is formed on the short-circuit side end surface 3 . As a result, a total of two resonant elements are configured for each resonator hole 5. Note that a slit 9 is formed between the resonator holes 5 to connect the resonator holes 5.5. The slit 9 may be formed on the short-circuit side end surface 3 as shown in FIG. 1, or may be formed on the opposing end surface 4 as shown in FIG.

一方、短絡側端面3の対向端面4には、入出力用電極1
0.10およびアース電極11が形成されている。入出
力用電極10は、両共振器孔5゜5の底部と対向した位
置に形成されており、入出力用電極10と内導体6とは
、誘電体ブロック2を挟んで容量結合している。また、
入出力用電極IOの端部10aは、誘電体ブロック2の
側面部にまで延出形成されている。アース電極11は、
入出力用電極lOを包囲して対向端面4全面に形成され
ている。また、入出力用電極lOは、アース電極!lお
よび外導体7と電気的に離間されて形成されている。
On the other hand, an input/output electrode 1 is provided on the opposite end surface 4 of the short-circuit side end surface 3.
0.10 and a ground electrode 11 are formed. The input/output electrode 10 is formed at a position facing the bottom of both resonator holes 5°5, and the input/output electrode 10 and the inner conductor 6 are capacitively coupled with the dielectric block 2 in between. . Also,
The end portion 10a of the input/output electrode IO is formed to extend to the side surface of the dielectric block 2. The earth electrode 11 is
It is formed on the entire surface of the opposing end surface 4 surrounding the input/output electrode IO. Also, the input/output electrode lO is a ground electrode! 1 and the outer conductor 7.

このように、対向端面4は、入出力電極lOおよびアー
ス電極11によってほぼ被覆されており、誘電体フィル
タlの表面全体は、入出力電極10、アース電極11、
外導体7等の金属膜によってほぼ被覆されている。
In this way, the opposing end surface 4 is almost covered with the input/output electrode 1O and the ground electrode 11, and the entire surface of the dielectric filter l is covered with the input/output electrode 10, the ground electrode 11,
It is almost covered with a metal film such as the outer conductor 7.

上記誘電体フィルタlは、外部回路である回路基板12
に表面実装される。すなわち、誘電体フィルタ1は、入
出力用電極IOが延出形成されている側面を下側にし、
入出力用電極10.10の端部10a、10aを回路基
板12上のストリップライン13.13に当接させて回
路基板I2に載置される。そして、ストリップライン1
3と入出力用電極10とを半田付けして、誘電体フィル
タlは、回路基板12に接続される。また、誘電体フィ
ルタ1のアース接続は、外導体7を回路基板12のアー
スパターン14に直接半田付けすることによって行われ
る。
The dielectric filter l is connected to a circuit board 12 which is an external circuit.
surface mounted. That is, the dielectric filter 1 has the side surface on which the input/output electrodes IO are formed facing downward, and
The input/output electrodes 10.10 are placed on the circuit board I2 with their ends 10a, 10a in contact with the strip lines 13.13 on the circuit board 12. And strip line 1
3 and the input/output electrode 10 are soldered to connect the dielectric filter 1 to the circuit board 12. Further, the dielectric filter 1 is grounded by directly soldering the outer conductor 7 to the grounding pattern 14 of the circuit board 12.

この誘電体フィルタlに高周波信号を入力すると、入出
力用電極10.10と内導体6.6との間に容量Sが生
じる。この容量Sは、外部回路との間の結合容量となり
、従来のような人出刃用の樹脂ビンを用いなくとも外部
回路との結合容量が得られる。
When a high frequency signal is input to this dielectric filter l, a capacitance S is generated between the input/output electrode 10.10 and the inner conductor 6.6. This capacitance S becomes a coupling capacitance with an external circuit, and the coupling capacitance with an external circuit can be obtained without using a resin bottle for a conventional blade.

なお、本実施例の場合、前記したそれぞれの半田付けが
リフロー半田付けによって行うことが可能であり、量産
性がより向上している。
In the case of this embodiment, each of the above-mentioned soldering can be performed by reflow soldering, which further improves mass productivity.

また、本実施例の場合、誘電体ブロックlは、開放側端
面が存在しないので磁束や電磁波の漏れがない。そのた
め、アース接続が外導体から直接行えることとあいまっ
て、従来のような金属ケースを必要としない。
Further, in the case of this embodiment, since the dielectric block l does not have an open end face, there is no leakage of magnetic flux or electromagnetic waves. Therefore, together with the fact that the earth connection can be made directly from the outer conductor, there is no need for a conventional metal case.

さらに、本実施例の場合、内導体6、外導体7、短絡電
極膜8、入出力用電極lO1およびアース電極11の各
金属膜は、メツキによって形成することができ、その分
、コストが低減されている。
Furthermore, in the case of this embodiment, each metal film of the inner conductor 6, outer conductor 7, short-circuit electrode film 8, input/output electrode 1O1, and ground electrode 11 can be formed by plating, and the cost is reduced accordingly. has been done.

ところで、上記実施例は、入出力用電極IOを誘電体ブ
ロック!側面に延出形成して、直接回路基板12のスト
リップライン13に半田付けして接続していたが、これ
に限るわけではなく、第4図に示すように金属ビンから
なる入出力端子15でもって、入出力用電極IOとスト
リップライン13とを接続して回路基板12に表面実装
するようにしてもよい。
By the way, in the above embodiment, the input/output electrode IO is a dielectric block! Although the strip line 13 of the circuit board 12 is formed to extend from the side surface and connected to the strip line 13 by soldering, the invention is not limited to this, and as shown in FIG. Therefore, the input/output electrode IO and the strip line 13 may be connected and surface mounted on the circuit board 12.

さらに、第5図に示すように、入出力用電極IOの端部
tobを誘電体ブロック2の横側面に延出形成すれば、
対向端面4とは違った面から回路基板12に接続するこ
とができる。
Furthermore, as shown in FIG. 5, if the end portion tob of the input/output electrode IO is formed to extend from the side surface of the dielectric block 2,
It can be connected to the circuit board 12 from a surface different from the opposing end surface 4.

なお、本発明においては、共振器孔5の底部と対向端面
4との間に内部間隙を形成しており、その分、誘電体フ
ィルタIの大きさが大型化することが考えられる。しか
しながら、入出力用電極lOとアース電極11との間等
に容量が発生し、この審議が共振周波数を低くする働き
をする。そのため、共振周波数が低くなった分だけ共振
器孔5の軸長長さを短くすることができるので、誘電体
フィルタlが大型化することが避けられる。
Note that in the present invention, an internal gap is formed between the bottom of the resonator hole 5 and the opposing end surface 4, and the size of the dielectric filter I may be increased accordingly. However, capacitance is generated between the input/output electrode lO and the earth electrode 11, and this consideration serves to lower the resonance frequency. Therefore, since the axial length of the resonator hole 5 can be shortened by the amount that the resonance frequency is lowered, it is possible to avoid increasing the size of the dielectric filter l.

さらに、上記いずれの実施例も二つの共振器孔5を有す
る誘電体フィルタ1において実施されたものであったが
、三つ以上の共振器孔5を有する誘電体フィルタにおい
ても実施できることはいうまでもない。
Furthermore, although each of the above embodiments was implemented in a dielectric filter 1 having two resonator holes 5, it goes without saying that the embodiments can also be implemented in a dielectric filter having three or more resonator holes 5. Nor.

〈発明の効果〉 以上のように、本発明によれば、別部品である入出力用
の樹脂ピンがいらなくなった。したがって、部品点数が
減り、その分、コストの低減ができた。
<Effects of the Invention> As described above, according to the present invention, there is no need for resin pins for input/output, which are separate parts. Therefore, the number of parts was reduced, and costs were reduced accordingly.

また、樹脂ピンといった別部品を誘電体ブロックに取り
付ける手間がいらなくなるので、その分、製造の手間が
削減されて、量産性が向上した。
Additionally, since there is no need to attach separate parts such as resin pins to the dielectric block, the manufacturing effort is reduced and mass productivity is improved.

さらに、誘電体フィルタを外部回路に表面実装すること
ができるようになり、その分でも、量産性の向上が図れ
るようになるとともに、高密度化実装が可能になった。
Furthermore, it has become possible to surface-mount dielectric filters on external circuits, which has also made it possible to improve mass productivity and enable high-density mounting.

さらにまた、外導体形成面である側面を外部回路への取
り付は面とすることができるので、誘電体フィルタの取
り付は高さを低くすることができ、実装の低背化が図れ
るようになった。
Furthermore, since the side surface, which is the surface on which the external conductor is formed, can be used as a surface for mounting to the external circuit, the mounting height of the dielectric filter can be lowered, making it possible to reduce the height of the mounting. Became.

【図面の簡単な説明】[Brief explanation of drawings]

第1図および第2図は本発明の一実施例に係り、第1図
は断面図、第2図は斜視図である。第3図は別実施例の
断面図である。第4図および第5図はそれぞれさらに他
の実施例の斜視図である。第6図は従来例の断面図であ
る。 l・・・誘電体フィルタ 2・・誘電体ブロック 3・・・短絡側端面 4・対向端面 5・・共振器孔 6・・・内導体 7・・・外導体 8・・・短絡電極膜 lO・・・入出力用電極
1 and 2 relate to one embodiment of the present invention, with FIG. 1 being a sectional view and FIG. 2 being a perspective view. FIG. 3 is a sectional view of another embodiment. FIGS. 4 and 5 are perspective views of still further embodiments. FIG. 6 is a sectional view of a conventional example. l...Dielectric filter 2...Dielectric block 3...Short-circuit side end face 4/Opposite end face 5...Resonator hole 6...Inner conductor 7...Outer conductor 8...Short-circuit electrode film lO ...Input/output electrode

Claims (1)

【特許請求の範囲】[Claims] (1)誘電体ブロック(2)の一端面に形成された短絡
側端面(3)と、 短絡側端面(3)から対向端面(4)に向かって有底状
に穿設され、かつ、互いに並列に配置された少なくとも
二つの共振器孔(5)と、 共振器孔(5)の内面全面に形成された内導体(6)と
、 誘電体ブロック(2)の側面全周に形成された外導体(
7)と、 短絡側端面(3)上に形成されて内導体(6)、外導体
(7)を短絡する短絡電極膜(8)とを備え、 前記対向端面(4)には、初段および最終段の共振器孔
(5)と対向した位置に入出力用電極(10)がそれぞ
れ形成されているとともに、この入出力用電極(10)
と初段および最終段の共振器孔(5)の内導体(6)と
は、容量結合していることを特徴とする誘電体フィルタ
(1) A short-circuit side end face (3) formed on one end face of the dielectric block (2), and a bottomed hole formed from the short-circuit side end face (3) toward the opposite end face (4), and mutually At least two resonator holes (5) arranged in parallel, an inner conductor (6) formed on the entire inner surface of the resonator hole (5), and an inner conductor (6) formed on the entire side surface of the dielectric block (2). Outer conductor (
7), and a short-circuit electrode film (8) formed on the short-circuit side end face (3) to short-circuit the inner conductor (6) and the outer conductor (7), and the opposite end face (4) has a first stage and a short-circuit electrode film (8). Input/output electrodes (10) are formed at positions facing the final stage resonator hole (5), and the input/output electrodes (10)
and the inner conductors (6) of the first and final stage resonator holes (5) are capacitively coupled.
JP16094290A 1990-06-19 1990-06-19 Dielectric filter Pending JPH0451602A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16094290A JPH0451602A (en) 1990-06-19 1990-06-19 Dielectric filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16094290A JPH0451602A (en) 1990-06-19 1990-06-19 Dielectric filter

Publications (1)

Publication Number Publication Date
JPH0451602A true JPH0451602A (en) 1992-02-20

Family

ID=15725556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16094290A Pending JPH0451602A (en) 1990-06-19 1990-06-19 Dielectric filter

Country Status (1)

Country Link
JP (1) JPH0451602A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398399A (en) * 1992-08-31 1995-03-21 Siemens Matsushita Components Gmbh Process for metallizing monolithic microwave ceramic filters
US5614875A (en) * 1994-07-19 1997-03-25 Dae Ryun Electronics, Inc. Dual block ceramic resonator filter having common electrode defining coupling/tuning capacitors
US5912603A (en) * 1995-12-12 1999-06-15 Murata Manufacturing Co., Ltd. Dielectric filter having a longitudinal through-hole and a transverse connection conductor
US6034579A (en) * 1994-02-18 2000-03-07 Murata Manufacturing Co., Ltd. Dielectric filter of the band elimination type
US6060965A (en) * 1993-12-14 2000-05-09 Electronics And Telecommunications Research Institute Dielectric resonator and filter including capacitor electrodes on a non-conductive surface
JP2001148601A (en) * 1999-11-19 2001-05-29 Fujitsu General Ltd High frequency circuit device
US6737943B2 (en) 2001-07-25 2004-05-18 Tdk Corporation Dielectric device with partially closed hole
JP2011211529A (en) * 2010-03-30 2011-10-20 Ube Industries Ltd Dielectric resonator device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114004A (en) * 1983-11-25 1985-06-20 Murata Mfg Co Ltd Dielectric coaxial resonator
JPS6390202A (en) * 1986-10-02 1988-04-21 Mitsubishi Electric Corp High-frequency filter
JPS63109601A (en) * 1986-10-28 1988-05-14 Toshiba Corp Filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114004A (en) * 1983-11-25 1985-06-20 Murata Mfg Co Ltd Dielectric coaxial resonator
JPS6390202A (en) * 1986-10-02 1988-04-21 Mitsubishi Electric Corp High-frequency filter
JPS63109601A (en) * 1986-10-28 1988-05-14 Toshiba Corp Filter

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398399A (en) * 1992-08-31 1995-03-21 Siemens Matsushita Components Gmbh Process for metallizing monolithic microwave ceramic filters
US6060965A (en) * 1993-12-14 2000-05-09 Electronics And Telecommunications Research Institute Dielectric resonator and filter including capacitor electrodes on a non-conductive surface
US6034579A (en) * 1994-02-18 2000-03-07 Murata Manufacturing Co., Ltd. Dielectric filter of the band elimination type
US5614875A (en) * 1994-07-19 1997-03-25 Dae Ryun Electronics, Inc. Dual block ceramic resonator filter having common electrode defining coupling/tuning capacitors
US5912603A (en) * 1995-12-12 1999-06-15 Murata Manufacturing Co., Ltd. Dielectric filter having a longitudinal through-hole and a transverse connection conductor
US6023208A (en) * 1995-12-12 2000-02-08 Murata Manufacturing Co., Ltd. Dielectric filter
US6054910A (en) * 1995-12-12 2000-04-25 Murata Manufacturing Co., Ltd. Dielectric filter having an inner conductor with two open-circuited inner ends
JP2001148601A (en) * 1999-11-19 2001-05-29 Fujitsu General Ltd High frequency circuit device
US6737943B2 (en) 2001-07-25 2004-05-18 Tdk Corporation Dielectric device with partially closed hole
JP2011211529A (en) * 2010-03-30 2011-10-20 Ube Industries Ltd Dielectric resonator device

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