JP2789784B2 - Coaxial dielectric resonator - Google Patents
Coaxial dielectric resonatorInfo
- Publication number
- JP2789784B2 JP2789784B2 JP2129594A JP12959490A JP2789784B2 JP 2789784 B2 JP2789784 B2 JP 2789784B2 JP 2129594 A JP2129594 A JP 2129594A JP 12959490 A JP12959490 A JP 12959490A JP 2789784 B2 JP2789784 B2 JP 2789784B2
- Authority
- JP
- Japan
- Prior art keywords
- conductor layer
- resonator
- hole
- dielectric
- groove
- 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 - Fee Related
Links
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Description
【発明の詳細な説明】 産業上の利用分野 本発明は、高周波帯で用いられる同軸型誘電体共振器
に関する。Description: TECHNICAL FIELD The present invention relates to a coaxial dielectric resonator used in a high frequency band.
従来の技術 近年、移動通信等においてマイクロ波帯が盛んに利用
されるようになってきた。これらの機器の小型軽量化を
実現するために、マイクロ波誘電体セラミックを共振器
材として用いた同軸型誘電体共振器が注目されている。2. Description of the Related Art In recent years, microwave bands have been actively used in mobile communication and the like. In order to reduce the size and weight of these devices, coaxial dielectric resonators using microwave dielectric ceramics as resonator materials have attracted attention.
以下に従来の同軸型誘電体共振器について説明する。 Hereinafter, a conventional coaxial dielectric resonator will be described.
第３図ａは従来の同軸型誘電体共振器〔一般に、誘電
体SIR（Stepped Impedance Resonator）と呼ばれてい
る〕の斜視図であり、同図ｂは同共振器の断面図であ
る。FIG. 3A is a perspective view of a conventional coaxial dielectric resonator (generally called a dielectric SIR (Stepped Impedance Resonator)), and FIG. 3B is a sectional view of the resonator.
一辺がb2の角筒状の誘電体31の第一の端面（以下、開
放端と称する）32に一辺がb1で深さがL2の角穴33が形成
されており、第二の端面（以下、短絡端と称する）34に
角穴33に達する直径がa1で深さがL1の丸孔35が形成され
ている。角穴33の内壁面に形成された開放端内導体層36
および丸孔35の内壁面に形成された短絡端内導体層37は
内部で接続されており、さらに短絡端内導体層37は短絡
端34を通って外導体層38に接続されている。さらに角穴
33の内寸b1を、丸孔35の内径a1に比べて大きくしてい
る。A first end face (hereinafter, referred to as an open end) 32 of a rectangular cylindrical dielectric body 31 having one side b2 is formed with a square hole 33 having a side b1 and a depth L2, and a second end face (hereinafter, referred to as an open end). A round hole 35 having a diameter a1 reaching the square hole 33 and a depth L1 is formed at 34. Open-end inner conductor layer 36 formed on the inner wall surface of square hole 33
The short-circuit end inner conductor layer 37 formed on the inner wall surface of the round hole 35 is connected internally, and the short-circuit end inner conductor layer 37 is connected to the outer conductor layer 38 through the short-circuit end 34. More square holes
The inner dimension b1 of 33 is larger than the inner diameter a1 of the round hole 35.
このような同軸型誘電体共振器は、線路インピーダン
スを部分的に変えることにより、共振器長を短縮するこ
とができ、スプリアス共振周波数を基本共振周波数の整
数倍からずらすこと（以下、スプリアス抑圧度と称す
る）が可能である。上記の共振器においては、開放端内
導体層36の形状が角筒状の方が、円筒錠に比べて、共振
器短縮率が大きく、スプリアス抑圧度も大きい。In such a coaxial dielectric resonator, the resonator length can be shortened by partially changing the line impedance, and the spurious resonance frequency is shifted from an integral multiple of the basic resonance frequency (hereinafter, the spurious suppression degree). Is called). In the above-described resonator, when the shape of the open-end inner conductor layer 36 is a rectangular tube, the resonator shortening rate is higher and the spurious suppression degree is higher than that of a cylindrical lock.
発明が解決しようとする課題 しかしながら上記従来の構成では、共振器長の短縮，
スプリアス特性は改善できるが、線路インピーダンスを
部分的に変えるために、開放端内導体層の形状を、短絡
端内導体層の形状に比べて大きくしており、そのために
1/4λ同軸共振器に比べ、負荷Ｑの劣化が大きくなる。
さらに、この共振器を用いてフィルタを構成する場合、
内導体層と結合回路との電気的，機械的接続方法が難し
く、工数も非常にかかる。例えば、この共振器をフィル
タに使用する場合、内導体層と結合回路部（以下、結合
基板と称する）とを、電気的，機械的に接続する金属金
具（以下、中心導体と称する）を、クリーム半田を塗布
した共振器内へ挿入後、リフローし、半田付けしている
が、中心導体の位置ずれ等に注意する必要があり、量産
性に欠ける等の課題を有していた。Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, shortening of the resonator length,
Although the spurious characteristics can be improved, the shape of the open-end inner conductor layer is made larger than that of the short-circuit end inner conductor layer in order to partially change the line impedance.
The deterioration of the load Q is larger than that of the 1 / 4λ coaxial resonator.
Furthermore, when configuring a filter using this resonator,
It is difficult to electrically and mechanically connect the inner conductor layer and the coupling circuit, and the man-hour is very long. For example, when this resonator is used for a filter, a metal fitting (hereinafter, referred to as a center conductor) that electrically and mechanically connects the inner conductor layer and a coupling circuit portion (hereinafter, referred to as a coupling substrate) is provided. After insertion into the cavity coated with cream solder, reflow and soldering are performed. However, attention must be paid to the displacement of the center conductor and the like, and there are problems such as lack of mass productivity.
本発明は上記従来の課題を解決するもので、Ｑ値が高
く、量産性に優れた構造の同軸型誘電体共振器を提供す
ることを目的とする。An object of the present invention is to solve the above-mentioned conventional problems and to provide a coaxial dielectric resonator having a structure having a high Q value and excellent mass productivity.
課題を解決するための手段 この目的を達成するために本発明の同軸型誘電体共振
器は、第一の端面と第二の端面を有し、軸方向に貫通孔
を形成した外形が方形状の柱状誘電体からなり、その柱
状誘電体の外周面と貫通孔内壁面と第二の端面とに形成
した導体層が互いに接続され、柱状誘電体の第一の端面
に貫通孔を取り囲むように四角形状の溝を設け、その溝
の内壁面に形成した導体層を貫通孔の内壁面に形成した
導体層に接続した構成を有している。Means for Solving the Problems In order to achieve this object, a coaxial dielectric resonator according to the present invention has a first end face and a second end face, and the outer shape in which a through hole is formed in the axial direction has a square shape. The conductor layer formed on the outer peripheral surface, the inner wall surface of the through hole, and the second end surface of the columnar dielectric is connected to each other, and surrounds the through hole on the first end surface of the columnar dielectric. A rectangular groove is provided, and the conductor layer formed on the inner wall surface of the groove is connected to the conductor layer formed on the inner wall surface of the through hole.
作用 この構成によって、従来の同軸型誘電体共振器に比較
して共振器の無負荷Ｑを大きくでき、しかも共振器長の
短縮率を大きくでき、更に、共振器の実装性を向上させ
る事ができる。Operation With this configuration, the no-load Q of the resonator can be increased as compared with the conventional coaxial dielectric resonator, the reduction rate of the resonator length can be increased, and the mountability of the resonator can be improved. it can.
実 施 例 以下本発明の一実施例について、図面を参照しながら
説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第１図ａは本発明の一実施例における同軸型誘電体共
振器の斜視図、第１図ｂは同共振器の断面図、第２図は
中心導体の斜視図である。1A is a perspective view of a coaxial dielectric resonator according to an embodiment of the present invention, FIG. 1B is a cross-sectional view of the resonator, and FIG. 2 is a perspective view of a center conductor.
これらの図において、１は柱状誘電体、２は第一の端
面（以下、開放端と称する）、３は第二の端面（以下、
短絡端と称する）、４は貫通孔、５は開放端２に形成さ
れた同軸状の溝、６は貫通孔４の内壁面に形成された内
導体層、７は溝５の内壁面に形成された溝部導体層、８
は開放端面導体層、９は柱状誘電体１の外周面、10は外
周面９に形成された外導体層、11は短絡端３に形成され
た短絡端面導体層である。In these figures, 1 is a columnar dielectric, 2 is a first end face (hereinafter referred to as an open end), and 3 is a second end face (hereinafter, referred to as an open end).
4 is a through hole, 5 is a coaxial groove formed on the open end 2, 6 is an inner conductor layer formed on the inner wall surface of the through hole 4, and 7 is formed on the inner wall surface of the groove 5. Grooved conductor layer, 8
Is an open end conductor layer, 9 is an outer peripheral surface of the columnar dielectric 1, 10 is an outer conductor layer formed on the outer peripheral surface 9, and 11 is a short-circuit end surface conductor layer formed on the short-circuit end 3.
第１図に示すように、柱状誘電体１は、その第一の端
面（開放端）２から第二の端面（短絡端）３に貫通する
貫通孔４と開放端２にあって貫通孔４を取り囲み同軸状
に設けられた溝５とを有している。そして貫通孔４の内
壁面に設けた内導体層６と溝５の内壁面に設けた溝部導
体層７とを開放端２に設けた開放端面導体層８により接
続し、かつ柱状誘電体１の外周面９に設けた外導体層10
と内導体層６とを短絡端３に設けた短絡端面導体層11に
より接続している。As shown in FIG. 1, a columnar dielectric 1 has a through hole 4 penetrating from a first end face (open end) 2 to a second end face (short end) 3 and a through hole 4 at the open end 2. And a groove 5 provided coaxially. The inner conductor layer 6 provided on the inner wall surface of the through hole 4 and the groove conductor layer 7 provided on the inner wall surface of the groove 5 are connected by the open end surface conductor layer 8 provided on the open end 2. Outer conductor layer 10 provided on outer peripheral surface 9
The inner conductor layer 6 and the inner conductor layer 6 are connected by a short-circuit end face conductor layer 11 provided at the short-circuit end 3.
このような柱状誘電体１の製造方法は、まず誘電体セ
ラミックを材料として貫通孔４および溝５を有する柱状
体を成形し、焼成した後、貫通孔４内部を含む全面にデ
ィップ法または無電解めっき法により導体層を形成し、
最後に開放端２のみ導体層を除去する。溝５の形状は内
導体６に対して同軸状であればリング状でも良いが、四
角形の方が共振器長の短縮率を大きくでき、無負荷Ｑの
劣化も小さい。The method of manufacturing such a columnar dielectric 1 is as follows. First, a columnar body having a through hole 4 and a groove 5 is formed using dielectric ceramic as a material and fired, and then the entire surface including the inside of the through hole 4 is dipped or electrolessly formed. Form conductor layer by plating method,
Finally, the conductor layer is removed only at the open end 2. The shape of the groove 5 may be a ring shape as long as it is coaxial with the inner conductor 6, but a rectangular shape can increase the reduction rate of the resonator length and reduce the degradation of the no-load Q.
なお、柱状誘電体１は一辺がb2で高さはＬ、貫通孔４
の内径は1a,溝５の外寸はb1,溝５の寸はb3,溝５の深さ
は短絡端３からL1の距離に溝５の底面があるものとし
て、これらの数値とインピーダンスＫまたは無負荷Ｑと
の関係を次の表に示した。The columnar dielectric 1 has a side b2, a height L, and a through hole 4
Is 1a, the outer dimension of the groove 5 is b1, the dimension of the groove 5 is b3, and the depth of the groove 5 is the distance from the short-circuit end 3 to L1. The relationship with the no-load Q is shown in the following table.
また、第１図に示す実施例では、開放端２側と短絡端
３側とで貫通孔４の形状は同一であり、第２図に示すよ
うな、従来の1/4λ同軸型誘電体共振器に使用している
中心導体をそのまま用いて簡単に内導体層６と結合基板
（図示せず）とを電気的，機械的に接続できる。この場
合、中心導体の挿入部12は同軸型誘電体共振器の貫通孔
４に圧入して内導体層と電気的接続するために使用し、
端子部13は外部回路基板との接続に使用する。 In the embodiment shown in FIG. 1, the shape of the through-hole 4 is the same at the open end 2 side and the short-circuit end 3 side, and as shown in FIG. The inner conductor layer 6 and the coupling substrate (not shown) can be easily electrically and mechanically connected using the center conductor used for the vessel as it is. In this case, the insertion part 12 of the center conductor is used for press-fitting into the through hole 4 of the coaxial dielectric resonator and electrically connecting to the inner conductor layer,
The terminal section 13 is used for connection to an external circuit board.
発明の効果 以上のように本発明は、柱状誘電体の開放端面の外導
体層と内導体層との間に溝を形成し、その溝に導体層を
形成することにより、従来の同軸型誘電体共振器に比
べ、共振器長の短縮率、スプリアス抑圧度を同じにし
て、共振器の無負荷Ｑを大きくすることができる。Effect of the Invention As described above, the present invention provides a conventional coaxial dielectric by forming a groove between the outer conductor layer and the inner conductor layer on the open end face of the columnar dielectric, and forming the conductor layer in the groove. As compared with the body resonator, the reduction rate of the resonator length and the degree of spurious suppression can be made the same, and the no-load Q of the resonator can be increased.
また、本発明の構造は共振器の内導体層と結合基板と
の接続において、従来の中心導体をその形状をそのまま
にして使用でき、工数，コストを大幅に改善できる。し
たがって本発明の同軸型誘電体共振器を用いてフィルタ
を構成することにより、挿入損失の小さい、量産性に優
れたものが可能となり、その工業的価値は極めて大きい
ものである。Further, the structure of the present invention allows the conventional center conductor to be used as it is in the connection between the inner conductor layer of the resonator and the coupling substrate, and the man-hour and cost can be greatly improved. Therefore, by forming a filter using the coaxial dielectric resonator of the present invention, a filter having a small insertion loss and excellent mass productivity can be obtained, and its industrial value is extremely large.
また、柱状誘電体の外形形状を方形状とすることによ
って、基板などに共振器を実装する際に、位置決めが行
いやすくなり、しかも共振器の転がりなどが発生しない
ので、実装性が向上する。In addition, by making the outer shape of the columnar dielectric rectangular, positioning becomes easier when the resonator is mounted on a substrate or the like, and the rolling of the resonator does not occur, so that the mountability is improved.
第１図ａは本発明の一実施例における同軸型誘電体共振
器の斜視図、第１図ｂは同共振器の断面図、第２図は中
心導体の斜視図、第３図ａは従来の同軸型誘電体共振器
の斜視図、第３図ｂは同共振器の断面図である。 １……柱状誘電体、２……第一の端面、３……第二の端
面、４……貫通孔、５……溝、６……内導体層、７……
溝部導体層、８……開放端面導体層、９……外周面、10
……外導体層、11……短絡端面導体層。1a is a perspective view of a coaxial dielectric resonator according to an embodiment of the present invention, FIG. 1b is a cross-sectional view of the resonator, FIG. 2 is a perspective view of a center conductor, and FIG. FIG. 3B is a sectional view of the same coaxial dielectric resonator. 1 ... columnar dielectric, 2 ... first end face, 3 ... second end face, 4 ... through hole, 5 ... groove, 6 ... inner conductor layer, 7 ...
Groove conductor layer 8, open end conductor layer 9, outer peripheral surface 10,
... outer conductor layer, 11 ... short-circuit end face conductor layer.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 米田 毅彦 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 徳永 裕美 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 江口 和弘 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 昭55−110401（ＪＰ，Ａ) 特開 平１−123501（ＪＰ，Ａ) 特開 平３−190304（ＪＰ，Ａ) 特開 昭58−108801（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01P 1/20 - 1/219 H01P 7/00 - 7/10──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Takehiko Yoneda 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Kazuhiro Eguchi 1006 Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-55-110401 (JP, A) JP-A-1-123501 (JP, A) JP-A-3-190304 (JP, A) JP-A-58-108801 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) H01P 1/20-1/219 H01P 7/00 -7/10
Claims (1)
貫通孔を形成した外形が方形状の柱状誘電体からなり、
その柱状誘電体の外周面と前記貫通孔内壁面と前記第二
の端面とに形成した導体層が互いに接続された同軸型誘
電体共振器であって、前記柱状誘電体の第一の端面に前
記貫通孔を取り囲むように四角形状の溝を設け、その溝
の内壁面に形成した導体層を前記貫通孔の内壁面に形成
した導体層に接続した同軸型誘電体共振器。An outer shape having a first end face and a second end face and having a through hole formed in an axial direction is made of a square columnar dielectric,
A coaxial dielectric resonator in which conductor layers formed on an outer peripheral surface of the columnar dielectric, an inner wall surface of the through hole, and the second end surface are connected to each other, and a first end surface of the columnar dielectric is A coaxial dielectric resonator in which a rectangular groove is provided so as to surround the through hole, and a conductor layer formed on an inner wall surface of the groove is connected to a conductor layer formed on an inner wall surface of the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2129594A JP2789784B2 (en) | 1990-05-18 | 1990-05-18 | Coaxial dielectric resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2129594A JP2789784B2 (en) | 1990-05-18 | 1990-05-18 | Coaxial dielectric resonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0423601A JPH0423601A (en) | 1992-01-28 |
| JP2789784B2 true JP2789784B2 (en) | 1998-08-20 |
Family
ID=15013311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2129594A Expired - Fee Related JP2789784B2 (en) | 1990-05-18 | 1990-05-18 | Coaxial dielectric resonator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2789784B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2901855B2 (en) * | 1993-10-06 | 1999-06-07 | パレス化学株式会社 | Fried agent for cuttings |
-
1990
- 1990-05-18 JP JP2129594A patent/JP2789784B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0423601A (en) | 1992-01-28 |
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