JPH084722Y2 - Dielectric filter - Google Patents
Dielectric filterInfo
- Publication number
- JPH084722Y2 JPH084722Y2 JP1990078864U JP7886490U JPH084722Y2 JP H084722 Y2 JPH084722 Y2 JP H084722Y2 JP 1990078864 U JP1990078864 U JP 1990078864U JP 7886490 U JP7886490 U JP 7886490U JP H084722 Y2 JPH084722 Y2 JP H084722Y2
- Authority
- JP
- Japan
- Prior art keywords
- resonance holes
- pair
- holes
- insulator
- coupling
- 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.)
- Expired - Lifetime
Links
- 230000008878 coupling Effects 0.000 claims description 34
- 238000010168 coupling process Methods 0.000 claims description 34
- 238000005859 coupling reaction Methods 0.000 claims description 34
- 239000004020 conductor Substances 0.000 claims description 31
- 239000003990 capacitor Substances 0.000 claims description 25
- 239000012212 insulator Substances 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、例えば自動車電話、パーソナル無線、コー
ドレス電話等の通信機器等に使用するための誘電体フィ
ルタに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a dielectric filter for use in communication devices such as car phones, personal radios, cordless phones and the like.
［従来の技術］ 通信機器等に使用するための1/4波長の分布定数型誘
電体フィルタは例えば特開平1-277001号（特願昭63-108
070号）公報に開示されている。また、ここには入力結
合コンデンサと出力結合コンデンサとシールド部材とを
絶縁性合成樹脂で一体化した組立体を用意し、この組立
体を誘電体ブロックに装着することが開示されている。[Prior Art] A quarter-wavelength distributed constant type dielectric filter for use in communication equipment is disclosed in, for example, Japanese Patent Application Laid-Open No. 1-277001 (Japanese Patent Application No. 63-108).
No. 070) publication. Further, there is disclosed that an assembly in which an input coupling capacitor, an output coupling capacitor and a shield member are integrated by an insulating synthetic resin is prepared, and this assembly is mounted on a dielectric block.
一方、１つの誘電体ブロックに３個以上の共振孔を設
け、多段誘電体フィルタを構成することがある。On the other hand, one dielectric block may be provided with three or more resonance holes to form a multi-stage dielectric filter.
［考案が解決しようとする課題］ ところで、本件出願人は、４個の共振孔を設けた誘電
体ブロックに２個の結合コンデンサとシールド部材との
組立体を装着した多段誘電体フィルタを製作した。この
誘電体フィルタにおいては、誘電体ブロックの開放端面
に対して組立体の合成樹脂面を密着させた。[Problems to be Solved by the Invention] By the way, the present applicant manufactured a multi-stage dielectric filter in which an assembly of two coupling capacitors and a shield member is mounted on a dielectric block having four resonance holes. . In this dielectric filter, the synthetic resin surface of the assembly was brought into close contact with the open end surface of the dielectric block.
この種の構造の多段誘電体フィルタを湿気の少ない環
境で使用する場合には問題が生じないが、湿気の多い環
境に置かれた場合には、誘電体ブロックの開放端面と組
立体との間に水分が残留し、誘電体フィルタの特性が変
化するという問題が生じた。また、組立体に使用される
PET等の合成樹脂は誘電体ブロック及び空気よりもＱが
悪いので、これが開放端面に密接していると電界エネル
ギーの損失が大きくなる。また、共振孔の内導体膜が開
放端面上に延在している場合に、ここに組立体の樹脂が
密着していると、浮遊容量が大きくなり、誘電体フィル
タの減衰特性に悪影響を及ぼす。This type of structure does not cause any problems when used in a damp environment, but when placed in a damp environment, the open end face of the dielectric block and the assembly may There is a problem that the moisture remains in the film and the characteristics of the dielectric filter change. Also used for assembly
Since synthetic resin such as PET has a lower Q than the dielectric block and air, loss of electric field energy increases when it is in close contact with the open end face. Also, when the inner conductor film of the resonance hole extends on the open end face, if the resin of the assembly is in close contact with it, the stray capacitance increases, which adversely affects the attenuation characteristics of the dielectric filter. .
そこで、本考案の目的は、結合コンデンサとシールド
部材との組立体を使用するのにもかかわらず特性の変化
又は低下の少ない誘電体フィルタを提供することにあ
る。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a dielectric filter whose characteristics are hardly changed or deteriorated even though an assembly of a coupling capacitor and a shield member is used.
［課題を解決するための手段］ 上記目的を達成するための本考案は、実施例を示す図
面の符号を参照して説明すると、互いに対向する一対の
端面２、３と前記一対の端面２、３間の外周面７とを有
すると共に前記一対の端面２、３の一方から他方に向っ
て延びている３個以上の共振孔4a〜4dと前記３個以上の
共振孔4a〜4cの相互間に設けられた貫通孔又はスリット
状の孔から成る結合孔5a〜5cとを有する誘電体ブロック
１と、前記３個以上の共振孔4a〜4dの壁面にそれぞれ設
けられた内導体膜６と、前記誘電体ブロック１の前記外
周面７に設けられた外導体膜８と、複数の結合コンデン
サ11とシールド部材15とを絶縁体16で一体化した組立体
17とから成り、且つ前記３個以上の共振孔4a〜4dの内の
両端の２個の共振孔4a、4dに前記結合コンデンサ11がそ
れぞれ結合されている誘電体フィルタにおいて、前記組
立体17の前記絶縁体16が前記誘電体ブロック１の前記一
対の端面２、３の内の一方の端面２の両端領域に接して
いる一対の端部19とこの一対の端部19の間に配置された
中間部（24とを有し、前記中間部24が、前記３個以上の
共振孔4a〜4dの内の前記結合コンデンサ11が結合されて
いない残りの共振孔4b、4cの入口に接触しないように前
記一方の端面２から離間し、前記シールド部材15の少な
くとも前記残りの共振孔4b、4cの上に配置されている部
分が前記絶縁体16の前記中間部24に埋設されていること
を特徴とする誘電体フィルタに係るものである。[Means for Solving the Problems] The present invention for achieving the above object will be described with reference to the reference numerals of the drawings showing the embodiments. A pair of end faces 2 and 3 and a pair of the end faces 2 facing each other are provided. Between the three or more resonance holes 4a-4d and the three or more resonance holes 4a-4d extending from one of the pair of end faces 2, 3 toward the other and having an outer peripheral surface 7 between them. A dielectric block 1 having through holes or coupling holes 5a to 5c formed of slit-shaped holes, and inner conductor films 6 provided on the wall surfaces of the three or more resonance holes 4a to 4d, respectively. An assembly in which an outer conductor film 8 provided on the outer peripheral surface 7 of the dielectric block 1, a plurality of coupling capacitors 11 and a shield member 15 are integrated by an insulator 16.
In the dielectric filter, which is composed of 17 and the coupling capacitors 11 are respectively coupled to the two resonance holes 4a and 4d at both ends of the three or more resonance holes 4a to 4d, The insulator 16 is disposed between a pair of end portions 19 contacting both end regions of one end surface 2 of the pair of end surfaces 2 and 3 of the dielectric block 1 and the pair of end portions 19. An intermediate portion (24) is provided so that the intermediate portion 24 does not come into contact with the inlets of the remaining resonance holes 4b, 4c to which the coupling capacitor 11 of the three or more resonance holes 4a-4d is not coupled. In addition, at least a portion of the shield member 15 which is separated from the one end surface 2 and is disposed on the remaining resonance holes 4b and 4c is embedded in the intermediate portion 24 of the insulator 16. The present invention relates to a dielectric filter.
［考案の作用及び効果］ 本考案は次の作用を有する。[Operation and Effect of the Invention] The present invention has the following operations.
（イ） 結合コンデンサ11が結合されない残りの共振孔
4b、4cの入口に対して絶縁体16が離間しているので、誘
電体ブロック１の一方の端面２と絶縁体16との間に水分
が残留しにくくなり、誘電体フィルタの特性の変化が少
なくなる。(B) Remaining resonance hole where coupling capacitor 11 is not coupled
Since the insulator 16 is separated from the inlets of 4b and 4c, it becomes difficult for moisture to remain between the one end surface 2 of the dielectric block 1 and the insulator 16, and the characteristics of the dielectric filter are not changed. Less.
（ロ） 結合コンデンサ11が結合させていない残りの共
振孔4b、4cの入口は絶縁体16から離間し、絶縁体16より
もＱが良い空気に接触するので、電界エネルギーの損失
が少なくなる。(B) Since the inlets of the remaining resonance holes 4b and 4c which are not coupled by the coupling capacitor 11 are separated from the insulator 16 and come into contact with air having a better Q than the insulator 16, loss of electric field energy is reduced.
（ハ） シールド部材15の少なくとも残りの共振孔4b、
4cの入口に対向する部分は絶縁体16の中間部24に埋設さ
れているので、水分によって残りの共振孔4b、4cの内導
体膜６がシールド部材15に接続されることがない。(C) At least the remaining resonance hole 4b of the shield member 15,
Since the portion of the insulator 16 facing the inlet is embedded in the intermediate portion 24 of the insulator 16, moisture does not connect the inner conductor film 6 of the remaining resonance holes 4b and 4c to the shield member 15.
［実施例］ 次に、第１図〜第７図を参照して本考案の実施例に係
る1/4波長分布定数型誘電体フィルタを説明する。[Embodiment] Next, a quarter-wavelength distributed constant dielectric filter according to an embodiment of the present invention will be described with reference to FIGS.
この誘電体フィルタは、チタン酸バリウム系磁器等の
高周波用誘電体材料から成る角柱状誘電体ブロック１を
備えている。誘電体ブロック１には、この一方の端面２
から他方の端面３に至る４個の共振孔4a、4b、4c、4dと
３個の結合孔5a、5b、5cとが設けられている。各共振孔
4a〜4dの壁面には内導体膜６がそれぞれ設けられ、一対
の端面２、３間の外周面７即ち４側面には外導体膜８が
設けられ、他方の端面３にはそれぞれの内導体膜６が外
導体膜８とをそれぞれ接続するように端面導体膜９が設
けられている。また、開放端面２の中間の２個の共振孔
4b、4cの入口を囲むように開放端面導体膜10が設けられ
ている。この開放端面導体膜10は内導体膜６に接続され
ている。内導体膜６、外導体膜８、端面導体膜９及び開
放端面導体膜９が銀ペーストを塗布して焼付けたものか
ら成る。This dielectric filter includes a prismatic dielectric block 1 made of a high frequency dielectric material such as barium titanate porcelain. The dielectric block 1 has one end face 2
To the other end face 3 are provided with four resonance holes 4a, 4b, 4c and 4d and three coupling holes 5a, 5b and 5c. Each resonance hole
Inner conductor films 6 are provided on the wall surfaces of 4a to 4d, outer conductor films 8 are provided on the outer peripheral surface 7 between the pair of end surfaces 2 and 3, that is, four side surfaces, and the other end surface 3 is provided with each inner conductor film. An end face conductor film 9 is provided so that the film 6 and the outer conductor film 8 are connected to each other. Also, two resonance holes in the middle of the open end face 2
An open end face conductor film 10 is provided so as to surround the entrances of 4b and 4c. The open end face conductor film 10 is connected to the inner conductor film 6. The inner conductor film 6, the outer conductor film 8, the end face conductor film 9 and the open end face conductor film 9 are formed by applying a silver paste and baking it.
誘電体ブロック１の両端の２つの共振孔4a及び4dに結
合コンデンサ11がそれぞれ挿入されている。２つの結合
コンデンサ11は、筒状のコンデンサ用磁器誘電体に一対
の電極を設けた磁器コンデンサから成る。各結合コンデ
ンサ11の一方のリード12は誘電体フィルタの入出力端子
として使用され、他方のリード13は接続部材14を介して
内導体膜６にそれぞれ接続されている。なお、第４図で
は結合コンデンサ11が概略的に示されている。Coupling capacitors 11 are inserted in the two resonance holes 4a and 4d at both ends of the dielectric block 1, respectively. The two coupling capacitors 11 are made of a ceramic capacitor in which a pair of electrodes are provided on a cylindrical capacitor dielectric. One lead 12 of each coupling capacitor 11 is used as an input / output terminal of the dielectric filter, and the other lead 13 is connected to the inner conductor film 6 via a connecting member 14. Incidentally, the coupling capacitor 11 is schematically shown in FIG.
２つの結合コンデンサ11とシールド部材15とは合成樹
脂から成るモールド絶縁体16によって一体化されてい
る。第３図は２つの結合コンデンサ11とシールド部材15
とを一体化した組立体17を示す。この組立体17は共振孔
4a、4dに対する径方向の位置決めを達成するための突出
部18と、共振孔4a、4dに対する結合コンデンサ11の深さ
方向の位置決めを達成するための鍔部19とを有する。The two coupling capacitors 11 and the shield member 15 are integrated by a mold insulator 16 made of synthetic resin. FIG. 3 shows two coupling capacitors 11 and a shield member 15.
An assembly 17 in which and are integrated is shown. This assembly 17 is a resonance hole
It has a protrusion 18 for achieving radial positioning with respect to 4a and 4d, and a flange portion 19 for achieving positioning in the depth direction of the coupling capacitor 11 with respect to the resonance holes 4a and 4d.
シールド部材15は、３つの結合孔5a、5b、5c及び２つ
の中間共振孔4b、4cの上方を覆う上面部20と誘電体ブロ
ック１の長手の対の側面の外導体膜８に接続するための
一対の側面部21、22と、外部回路基板（図示せず）に対
する取付け及びアースに対する接続に利用するための複
数の突出部23とから成り、全体としてコ字状に形成され
ている。In order to connect the shield member 15 to the upper conductor 20 covering the three coupling holes 5a, 5b, 5c and the two intermediate resonance holes 4b, 4c, and the outer conductor film 8 on the side surface of the pair of long sides of the dielectric block 1. It is composed of a pair of side surface portions 21 and 22 and a plurality of projection portions 23 used for attachment to an external circuit board (not shown) and connection to a ground, and is formed in a U shape as a whole.
絶縁体16はシールド部材15の上面部20の大部分と２つ
の結合コンデンサ11とを覆うように形成されている。こ
の絶縁体16の２つの結合コンデンサ11を一体化するため
の中間部24と鍔部19との間に段差が設けられている。即
ち、中間部24は第４図に示すように２つの中間共振孔4
b、4cと３つの結合孔5a、5b、5cの入口を含む開放端面
２の領域から0.1mm以上（好ましくは0.1〜1.0mmの範
囲）離間している。The insulator 16 is formed so as to cover most of the upper surface portion 20 of the shield member 15 and the two coupling capacitors 11. A step is provided between the intermediate portion 24 and the collar portion 19 for integrating the two coupling capacitors 11 of the insulator 16. That is, the intermediate portion 24 has two intermediate resonance holes 4 as shown in FIG.
It is separated by 0.1 mm or more (preferably in the range of 0.1 to 1.0 mm) from the region of the open end face 2 including the inlets of b, 4c and the three coupling holes 5a, 5b, 5c.
組立体17を誘電体ブロック１に一体化する時には、シ
ールド部材15の弾性を有する一対の側面部21、22で外導
体膜８を挟持し、これを半田（図示せず）で外導体膜８
に固着する。完成した誘電体フィルタを外部回路基板に
取付ける時には、結合コンデンサ11のリード12及びシー
ルド部材15の突出部23を外部回路基板の貫通孔に挿入
し、信号伝送ライン及びアースラインに接続する。When the assembly 17 is integrated with the dielectric block 1, the outer conductor film 8 is sandwiched between the pair of elastic side surface portions 21 and 22 of the shield member 15, and the outer conductor film 8 is soldered (not shown).
Stick to. When the completed dielectric filter is attached to the external circuit board, the leads 12 of the coupling capacitor 11 and the protrusions 23 of the shield member 15 are inserted into the through holes of the external circuit board and connected to the signal transmission line and the ground line.
第５図は第１図〜第４図の誘電体フィルタの等価回路
を示す。４つの共振孔4a、4b、4c、4dに基づく４つの共
振回路は、L1、C1、L2、C2、L3、C3、L4、C4で示されて
いる。これ等の共振回路は、各共振孔4a〜4dの内導体膜
６と外導体膜８と端面導体膜９とに基づいて形成され
る。各共振回路は誘導性インピーダンスZ1、Z2、Z3によ
って結合されている。なお、開放端面２における中間共
振孔4b、4cに接続された開放端面導体膜10はL2とC2及び
L3とC3の各共振回路の容量性結合を寄与する。２つの結
合コンデンサ11は第５図でCa、Cbで示されている。FIG. 5 shows an equivalent circuit of the dielectric filter shown in FIGS. The four resonant circuits based on the four resonant holes 4a, 4b, 4c, 4d are designated L1, C1, L2, C2, L3, C3, L4, C4. These resonance circuits are formed on the basis of the inner conductor film 6, the outer conductor film 8 and the end face conductor film 9 in each of the resonance holes 4a to 4d. Each resonant circuit is coupled by an inductive impedance Z1, Z2, Z3. The open end face conductor film 10 connected to the intermediate resonance holes 4b and 4c in the open end face 2 has L2 and C2 and
It contributes to the capacitive coupling of each resonant circuit of L3 and C3. The two coupling capacitors 11 are indicated by Ca and Cb in FIG.
この誘電体フィルタの湿度に対する特性を調べるため
に、高湿度（95％）の雰囲気に誘電体フィルタを一定時
間放置し、その後、湿度60％、温度25℃の雰囲気に放置
し、この経過時間と中心周波数の変化を調べたところ、
第６図の特性線Ａになった。比較のために、第４図で絶
縁体16を開放端面２に接するように形成したフィルタの
特性を同様に測定したところ、第６図の特性線Ｂになっ
た。これから明らかなように、本実施例では絶縁体16と
開放端面２との間に間隙25があるので、湿中試験におけ
る水分の残留が極めて少なく、中心周波数の変化が小さ
い。これに対して比較例の場合には、絶縁体16と開放端
面２との間の微細な間隙に水分が残留し、これが短時間
に除去されないので、中心周波数の回復するまでの時間
が長くなる。In order to investigate the characteristics of this dielectric filter with respect to humidity, the dielectric filter was left in a high humidity (95%) atmosphere for a certain period of time, and then left in an atmosphere with a humidity of 60% and a temperature of 25 ° C. When I examined the change in the center frequency,
It became the characteristic line A of FIG. For comparison, the characteristic of the filter formed so that the insulator 16 is in contact with the open end face 2 in FIG. 4 was measured in the same manner, and the characteristic line B in FIG. 6 was obtained. As is apparent from this, in this embodiment, since there is the gap 25 between the insulator 16 and the open end surface 2, the residual moisture in the wet test is extremely small, and the change of the center frequency is small. On the other hand, in the case of the comparative example, moisture remains in the minute gap between the insulator 16 and the open end face 2 and is not removed in a short time, so that the time until the center frequency is restored becomes long. .
また、実施例と比較例の誘電体フィルタの周波数特性
を調べたところ、本実施例のものは第７図の特性線Ａと
なり、比較例のものは特性線Ｂとなった。本実施例のも
のが特性が良くなるのは、中間共振孔4b、4c及び結合孔
5a、5b、5cの開放端面２に絶縁体16よりもＱが良い空気
が接触しているために、電界エネルギー損失が低減した
からである。Further, when the frequency characteristics of the dielectric filters of the example and the comparative example were examined, the characteristic line A of FIG. 7 was obtained for the example and the characteristic line B of the comparative example was obtained. The characteristics of this example are improved because the intermediate resonance holes 4b and 4c and the coupling hole are formed.
This is because the open end surface 2 of 5a, 5b, 5c is in contact with the air having a better Q than the insulator 16, so that the electric field energy loss is reduced.
また、開放端面導体膜10とシールド部材15の上面部20
との間に空気による間隙25があるので、浮遊容量が小さ
くなり、これによる特性改善効果も認められる。In addition, the open end face conductor film 10 and the upper surface portion 20 of the shield member 15 are
Since there is an air gap 25 between and, the stray capacitance is reduced, and the effect of improving the characteristics is also recognized.
［変形例］ 本考案は上述の実施例に限定されるものでなく、例え
ば次の変形が可能なものである。[Modification] The present invention is not limited to the above-described embodiments, and the following modifications are possible, for example.
（１） 共振孔4a〜4dの数を増減することができる。(1) The number of resonance holes 4a to 4d can be increased or decreased.
（２） 共振孔4a〜4dの相互間に容量性結合手段を設け
ることができる。(2) Capacitive coupling means can be provided between the resonance holes 4a to 4d.
（３） 結合孔5a〜5cの代りにスリットを設けることが
できる。(3) Instead of the coupling holes 5a-5c, slits can be provided.
（４） 端面導体膜９を省いた構成にすることができ
る。(4) The end surface conductor film 9 can be omitted.
第１図は本考案の１実施例に係わる誘電体フィルタの一
部切欠斜視図、 第２図は第１図の導電膜を有する誘電体ブロックを示す
一部切欠斜視図、 第３図は第１図の組立体を示す一部切欠斜視図、 第４図は第１図の誘電体フィルタのIV-IV線断面図、 第５図は第１図の誘電体フィルタの等価回路図、 第６図は実施例と比較例の誘電体フィルタの耐湿特性を
示す図、 第７図は実施例と比較例の誘電体アィルタの周波数特性
を示す図である。 １……誘電体ブロック、２……開放端面、4a、4b、4c、
4d……共振孔、5a、5b、5c、5d……結合孔、６……内導
体膜、７……外周面、８……外導体膜、11……結合コン
デンサ、15……シールド部材、16……絶縁体、17……組
立体。1 is a partially cutaway perspective view of a dielectric filter according to an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view showing a dielectric block having a conductive film of FIG. 1, and FIG. 1 is a partially cutaway perspective view showing the assembly of FIG. 1, FIG. 4 is a sectional view taken along line IV-IV of the dielectric filter of FIG. 1, FIG. 5 is an equivalent circuit diagram of the dielectric filter of FIG. FIG. 7 is a diagram showing the moisture resistance characteristics of the dielectric filters of the example and the comparative example, and FIG. 7 is a diagram showing the frequency characteristic of the dielectric filters of the example and the comparative example. 1 ... Dielectric block, 2 ... Open end face, 4a, 4b, 4c,
4d ... Resonance hole, 5a, 5b, 5c, 5d ... Coupling hole, 6 ... Inner conductor film, 7 ... Outer peripheral surface, 8 ... Outer conductor film, 11 ... Coupling capacitor, 15 ... Shield member, 16 ... Insulator, 17 ... Assembly.
Claims (1)
記一対の端面（２、３）間の外周面（７）とを有すると
共に前記一対の端面（２、３）の一方から他方に向って
延びている３個以上の共振孔（4a〜4d）と前記３個以上
の共振孔（4a〜4c）の相互間に設けられた結合孔（5a〜
5c）とを有する誘電体ブロック（１）と、 前記３個以上の共振孔（4a〜4d）の壁面にそれぞれ設け
られた内導体膜（６）と、 前記誘電体ブロック（１）の前記外周面（７）に設けら
れた外導体膜（８）と、 複数の結合コンデンサ（11）とシールド部材（15）とを
絶縁体（16）で一体化した組立体（17）と から成り、且つ前記３個以上の共振孔（4a〜4d）の内の
両端の２個の共振孔（4a、4d）に前記結合コンデンサ
（11）がそれぞれ結合されている誘電体フィルタにおい
て、 前記組立体（17）の前記絶縁体（16）が前記誘電体ブロ
ック（１）の前記一対の端面（２、３）の内の一方の端
面（２）の両端領域に接している一対の端部（19）とこ
の一対の端部（19）の間に配置された中間部（24）とを
有し、 前記中間部（24）が、前記３個以上の共振孔（4a〜4d）
の内の前記結合コンデンサ（11）が結合されていない残
りの共振孔（4b、4c）の入口に接触しないように前記一
方の端面（２）から離間し、 前記シールド部材（15）の少なくとも前記残りの共振孔
（4b、4c）の上に配置されている部分が前記絶縁体（1
6）の前記中間部（24）に埋設されていることを特徴と
する誘電体フィルタ。1. A pair of end surfaces (2, 3) facing each other and an outer peripheral surface (7) between the pair of end surfaces (2, 3), and one to the other of the pair of end surfaces (2, 3). Or more resonance holes (4a to 4d) extending toward each other and coupling holes (5a to 4a) provided between the three or more resonance holes (4a to 4c).
5c), a dielectric block (1), inner conductor films (6) respectively provided on the wall surfaces of the three or more resonance holes (4a to 4d), and the outer periphery of the dielectric block (1). An outer conductor film (8) provided on the surface (7), an assembly (17) in which a plurality of coupling capacitors (11) and a shield member (15) are integrated by an insulator (16), and A dielectric filter in which the coupling capacitors (11) are respectively coupled to two resonance holes (4a, 4d) at both ends of the three or more resonance holes (4a-4d), wherein the assembly (17) ) A pair of end portions (19) in which the insulator (16) is in contact with both end regions of one end face (2) of the pair of end faces (2, 3) of the dielectric block (1). And an intermediate portion (24) disposed between the pair of end portions (19), wherein the intermediate portion (24) has the three or more resonance holes (4a). 4d)
The coupling capacitor (11) is separated from the one end face (2) so as not to come into contact with the inlet of the remaining uncoupled resonance holes (4b, 4c), and at least the shield member (15) The portion disposed above the remaining resonance holes (4b, 4c) is the insulator (1
A dielectric filter which is embedded in the intermediate portion (24) of 6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990078864U JPH084722Y2 (en) | 1990-07-25 | 1990-07-25 | Dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990078864U JPH084722Y2 (en) | 1990-07-25 | 1990-07-25 | Dielectric filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0436302U JPH0436302U (en) | 1992-03-26 |
| JPH084722Y2 true JPH084722Y2 (en) | 1996-02-07 |
Family
ID=31622514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990078864U Expired - Lifetime JPH084722Y2 (en) | 1990-07-25 | 1990-07-25 | Dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084722Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0666565B2 (en) * | 1988-10-28 | 1994-08-24 | 太陽誘電株式会社 | Dielectric resonator and manufacturing method thereof |
-
1990
- 1990-07-25 JP JP1990078864U patent/JPH084722Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0436302U (en) | 1992-03-26 |
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