JPH0793527B2 - Coaxial dielectric resonator - Google Patents
Coaxial dielectric resonatorInfo
- Publication number
- JPH0793527B2 JPH0793527B2 JP2334177A JP33417790A JPH0793527B2 JP H0793527 B2 JPH0793527 B2 JP H0793527B2 JP 2334177 A JP2334177 A JP 2334177A JP 33417790 A JP33417790 A JP 33417790A JP H0793527 B2 JPH0793527 B2 JP H0793527B2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric
- dielectric block
- resonator
- coaxial
- block
- 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
- 239000004020 conductor Substances 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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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、上下方向に貫通する共振器孔が形成された誘
電体ブロックの上面を開放面として、他方の底面を短絡
面として、開放面を除く他の全面に導電膜を形成してな
る同軸型誘電体共振器に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an open surface that is an upper surface of a dielectric block in which a resonator hole penetrating in the vertical direction is formed, and the other bottom surface is a short circuit surface. The present invention relates to a coaxial type dielectric resonator formed by forming a conductive film on the entire surface except for.
誘電体セラミックを用いた同軸型共振器すなわち同軸型
誘電体共振器は公知であり、自動車電話やコードレス電
話のような移動無線、あるいは衛星通信等の分野で帯域
共振器として広く利用されている。第４図および第５図
は、そのような同軸型誘電体共振器の従来の構成例を示
すものである。A coaxial resonator using a dielectric ceramic, that is, a coaxial dielectric resonator is known, and is widely used as a band resonator in the fields of mobile radio such as a car phone and a cordless phone, or satellite communication. FIG. 4 and FIG. 5 show a conventional configuration example of such a coaxial dielectric resonator.
この同軸型誘電体共振器は、誘電体ブロック１に上下方
向に貫通する共振器孔２を形成すると共に、誘電体ブロ
ック１の上面を開放面とし、底面を短絡面として、開放
面を除く他の全面、すなわち全側面および短絡面と共振
器孔２の内面に導電膜３を形成している。このような基
本構成により、共振器孔２を中心としてTEMモードの同
軸型共振器が構成される。In this coaxial dielectric resonator, a resonator hole 2 penetrating in the vertical direction is formed in a dielectric block 1, and the upper surface of the dielectric block 1 is used as an open surface and the bottom surface is used as a short-circuit surface. The conductive film 3 is formed on the entire surface, that is, on all side surfaces and the short-circuit surface and the inner surface of the resonator hole 2. With such a basic configuration, a TEM mode coaxial resonator is constructed around the resonator hole 2.
この基本構成を基にして、「段差」、すなわち上半部と
下半部とで異なる外径とする（図示の場合、上半部が小
径で、下半部が大径）ように段差を設けることによっ
て、スプリアス周波数を制御できることが知られてい
る。Based on this basic configuration, a step is made, that is, a step is made so that the upper half and the lower half have different outer diameters (in the figure, the upper half has a small diameter and the lower half has a large diameter). It is known that the spurious frequency can be controlled by providing it.
本発明は、この種のスプリアス周波数を制御するために
段差を設ける型の同軸型誘電体共振器の改善に関するも
のである。The present invention relates to an improvement in a coaxial dielectric resonator of a type having a step for controlling this type of spurious frequency.
上記のように段差を設けた同軸型誘電体共振器は、形状
が複雑であるため、単一の金型による成型では、均一な
密度に仕上げることが困難であって割れを生じ易く、そ
のため安定した特定の製品を得るのが難しい。Since the coaxial dielectric resonator with steps as described above has a complicated shape, it is difficult to finish it with a uniform density by molding with a single mold, and cracks easily occur, so stable Difficult to get a specific product made.
上記の単一の共振器を基にして多段フィルタを構成する
ことも知られているが、その場合には、なお一層、上記
の困難が顕著となり、製造コストも高くつくことにな
る。It is also known to construct a multistage filter based on the above-mentioned single resonator, but in that case, the above-mentioned difficulties become more remarkable and the manufacturing cost becomes high.
本発明は以上の事情を考慮してなされたもので、小型で
スプリアス特性に優れ、しかも製造性の良い誘電体共振
器を提供することを目的とする。The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a dielectric resonator having a small size, excellent spurious characteristics, and good manufacturability.
上記目的を達成するために本発明による同軸型誘電体共
振器は、共振器孔が形成された、段差を有しない筒状の
第１の誘電体ブロックと、第１の誘電体ブロックとは異
なる軸方向長さおよび第１の誘電体ブロックの外形横断
面形状とほぼ等しい断面形状の貫通孔を有し、第１の誘
電体ブロックと底面を揃えて第１の誘電体ブロックを取
り囲むように同心配置された筒状の第２の誘電体ブロッ
クとからなり、両誘電体ブロックの組立体の、上面を除
く全面に導電膜が形成されていることを特徴とする。In order to achieve the above-mentioned object, the coaxial dielectric resonator according to the present invention is different from the first dielectric block having a resonator hole formed therein and having no step, and the first dielectric block. It has a through hole having an axial length and a cross-sectional shape that is substantially equal to the external cross-sectional shape of the first dielectric block, and is concentric so that the bottom surface is aligned with the first dielectric block and surrounds the first dielectric block. It is characterized in that the conductive film is formed on the entire surface of the assembly of both dielectric blocks except the upper surface, which is composed of the arranged second cylindrical dielectric block.
１つの同軸型誘電体共振器を、放射方向に２分された、
段差のない２つの筒型導電体ブロックから構成すること
によって、従来の段差付き同軸型誘電体共振器と少なく
とも同等機能の同軸型誘電体共振器を単純な構造の金型
で成型しても均一な密度に仕上げることが容易であり、
さらに両誘電体ブロックの比誘電率を任意に選択するこ
とができるので、品質の安定した所望の共振器特性を容
易に得ることができる。One coaxial dielectric resonator is bisected in the radial direction,
Even if a coaxial dielectric resonator having at least the same function as that of the conventional coaxial dielectric resonator with steps is molded by a mold having a simple structure, it is uniform by being composed of two cylindrical conductor blocks without steps. It is easy to finish it with various densities,
Furthermore, since the relative permittivity of both dielectric blocks can be arbitrarily selected, desired resonator characteristics with stable quality can be easily obtained.
第１図は本発明による同軸型誘電体共振器の一実施例を
示すものである。この実施例による導軸型誘電体共振器
20は同心配置の２つの誘電体ブロック、すなわち共に段
差のない円筒状に形成された第１の誘電体ブロック21と
第２の導電体ブロック22とからなっている。第１の誘電
体ブロック21は共振器孔23を有するとともに相対的に大
きな軸方向長さと相対的に小さな外径を持っており、第
２の誘電体ブロック22は相対的に小さな軸方向長さと第
１の誘電体ブロック21の外径よりもわずかに大きい内径
の貫通孔とを持っている。そして両誘電体ブロック21,2
2は底面を揃えて同心配置されており、その接合部24が
ガラス融着等により接合される。両誘電体ブロック21,2
2は同一比誘電率を有するものであってもよいが、互い
に異なる比誘電率を有するものであってもよい。接合さ
れた両誘電体ブロック21,22の全体としての上面（開放
面）を除く全面、すなわち全側面、底面（短絡面）、段
差部（誘電体ブロック22の上面）、および共振器孔23の
内面、にそれぞれ導電膜16が形成される。FIG. 1 shows an embodiment of a coaxial dielectric resonator according to the present invention. Conductor type dielectric resonator according to this embodiment
20 is composed of two concentric dielectric blocks, that is, a first dielectric block 21 and a second conductive block 22 both of which are formed in a cylindrical shape without steps. The first dielectric block 21 has a resonator hole 23 and has a relatively large axial length and a relatively small outer diameter, and the second dielectric block 22 has a relatively small axial length. It has a through hole having an inner diameter slightly larger than the outer diameter of the first dielectric block 21. And both dielectric blocks 21,2
2 are arranged concentrically with their bottom surfaces aligned, and their joints 24 are joined by glass fusion or the like. Both dielectric blocks 21,2
2 may have the same relative dielectric constant, but may have different relative dielectric constants. The entire surface of the joined dielectric blocks 21 and 22 excluding the upper surface (open surface), that is, all side surfaces, the bottom surface (short-circuit surface), the stepped portion (upper surface of the dielectric block 22), and the resonator hole 23. The conductive film 16 is formed on each of the inner surfaces.
以上の実施例は横断面が円形であるものとして説明して
きたが、本発明は横断面四角形のものにも適用すること
ができる。第２図はそのような実施例の外形を示すもの
である。Although the above embodiments have been described as having a circular cross section, the present invention can also be applied to a rectangular cross section. FIG. 2 shows the outer shape of such an embodiment.
第２図の実施例による同軸型誘電体共振器40において
は、個々の誘電体ブロック41,42が四角形をしている以
外は、第１図のものと類似している。第１の誘電体ブロ
ック41および第２の誘電体ブロック42はそれぞれ四角形
の横断面を持っており、しかも第１の誘電体ブロック41
の幅寸法は第２の誘電体ブロック42のそれよりも小さく
形成されている。第１の誘電体ブロック41の下半部を第
２の誘電体ブロック42が取り囲むように両者は底面を揃
えて配置され、内側に配置される第１の誘電体ブロック
41に共振器孔43を形成している。両誘電体ブロック41,4
2は誘電体ブロック42の内周面とそれに当接する誘電体
ブロック41の外周面との間に形成される接合部45でガラ
ス融着等により接合される。そして、一体化された両誘
電体ブロック組立体の上面を除いた全面に導電膜46が施
されている。The coaxial dielectric resonator 40 according to the embodiment of FIG. 2 is similar to that of FIG. 1 except that the individual dielectric blocks 41, 42 are square. Each of the first dielectric block 41 and the second dielectric block 42 has a rectangular cross section, and the first dielectric block 41
Is formed smaller than that of the second dielectric block 42. The first dielectric block 41 is arranged inside so that the second dielectric block 42 surrounds the lower half of the first dielectric block 41, and is arranged inside.
A resonator hole 43 is formed in 41. Both dielectric blocks 41,4
Reference numeral 2 denotes a joint portion 45 formed between the inner peripheral surface of the dielectric block 42 and the outer peripheral surface of the dielectric block 41 that is in contact with the inner peripheral surface of the dielectric block 42 and is joined by glass fusion or the like. The conductive film 46 is applied to the entire surface of the integrated both dielectric block assemblies except the upper surfaces.
以上のようにして構成される同軸型誘電体共振器20,40
の個々の誘電体ブロック（21,22），（41,42）はそれぞ
れ段差の無い単純な筒型形状をしているので成型は容易
であり、均質な成型品を得るのも容易である。このよう
な構成の同軸型誘電体共振器は第１の誘電体ブロックと
第２の誘電体ブロックとの接合に多少のコストがかかる
のはやむを得ないが、安定した品質の製造を容易に得る
ことができ、しかも、とくに多段化の際の設計自由度が
大きい、という大きな特徴を持っている。いずれにして
もインピーダンスの異なる線路の組合せにより共振回路
が構成されるため、それ自体周知のごとく、スプリアス
周波数を基本波周波数の整数倍からシフトさせることが
でき、各誘電体ブロックの比誘電率や機械的寸法を調節
することによりスプリアス周波数を適当に制御すること
ができる。Coaxial type dielectric resonator 20, 40 configured as described above
The individual dielectric blocks (21, 22) and (41, 42) each have a simple cylindrical shape with no step, so that molding is easy and a homogeneous molded product is also easy to obtain. It is unavoidable that the coaxial dielectric resonator having such a configuration requires some cost for joining the first dielectric block and the second dielectric block, but it is easy to obtain stable quality manufacturing. It has the great feature of being able to perform, and in particular, having a high degree of freedom in design, especially in the case of multiple stages. In any case, since the resonant circuit is composed of a combination of lines with different impedances, it is possible to shift the spurious frequency from an integral multiple of the fundamental frequency, as known per se, and the relative permittivity of each dielectric block and The spurious frequency can be controlled appropriately by adjusting the mechanical dimensions.
第３図は、第２図の実施例による同軸型誘電体共振器40
を基本としてそれを多段化して構成した誘電体フィルタ
50の実施例を示すものである。この誘電体フィルタ50
は、結果的に第２図の同軸型誘電体共振器40を３組用意
し、第２の誘電体ブロック42どうしを横方向に接合した
ものに相当する。しかし、この場合は、共通の誘電体ブ
ロック52の挿入孔の中に、これとは別体に構成された３
個の誘電体ブロック51a,51b,51cを挿入した結果となっ
ている。FIG. 3 shows a coaxial dielectric resonator 40 according to the embodiment of FIG.
Dielectric filter composed of multiple stages based on
50 shows 50 examples. This dielectric filter 50
2 corresponds to one in which three sets of the coaxial type dielectric resonators 40 of FIG. 2 are prepared and the second dielectric blocks 42 are joined laterally. However, in this case, it is arranged in the insertion hole of the common dielectric block 52 separately from the insertion hole.
This is the result of inserting the individual dielectric blocks 51a, 51b, 51c.
第１の誘電体ブロック51a,51b,51cはそれぞれ共振器孔5
3a,53b,53cを持っている。第１の導電体ブロック51a,51
b,51cは、第２の導電体ブロック52の中に挿入され、接
合部55a,55b,55cで第２の誘電体ブロック52の挿入孔内
面に接合されている。第１の誘電体ブロック51a〜51cと
第２の誘電体ブロック52の寸法の相対関係により、誘電
体ブロック51a,51b間、および誘電体ブロック51b,51c間
には、それぞれ電解結合阻止空間57a,57bが形成され
る。この電界結合阻止空間57a,57bはそれぞれ孔53a,53
b,53cを中心として構成される単位同軸共振器相互間の
磁界結合構造として作用し、ここに３段型の誘電体共振
器50が構成されることになる。The first dielectric blocks 51a, 51b, 51c are respectively the resonator holes 5
I have 3a, 53b, 53c. First conductor block 51a, 51
The b and 51c are inserted into the second conductor block 52, and are joined to the inner surface of the insertion hole of the second dielectric block 52 at the joint portions 55a, 55b and 55c. Due to the relative dimensions of the first dielectric blocks 51a to 51c and the second dielectric block 52, electrolytic coupling blocking spaces 57a, 51b are formed between the dielectric blocks 51a, 51b and between the dielectric blocks 51b, 51c. 57b is formed. The electric field coupling blocking spaces 57a and 57b are holes 53a and 53, respectively.
This acts as a magnetic field coupling structure between the unit coaxial resonators configured around b and 53c, and the three-stage type dielectric resonator 50 is configured here.
上記各実施例において、共振器孔はストレートに形成さ
れているものとして説明してきたが、本発明はそれに限
定されるものではなく、第１の誘電体ブロックの共振器
孔の直径を上部と下部とで異なるものとすることができ
る。In each of the above-described embodiments, the resonator hole is described as being formed straight, but the present invention is not limited to this, and the diameter of the resonator hole of the first dielectric block is set to the upper and lower portions. And can be different.
以上述べた本発明によれば、段差の無い２つの筒型形状
の誘電体ブロックを組合せて１つの段差を有する同軸型
誘電体共振器を構成することによって、小型でスプリア
ス特性に優れ、しかも製造性の良い誘電体共振器を提供
することができる。According to the present invention described above, a coaxial dielectric resonator having one step is formed by combining two cylindrical dielectric blocks having no step, and is small in size, excellent in spurious characteristics, and manufactured. It is possible to provide a dielectric resonator having good properties.
第１図は本発明による円筒型誘電体ブロックを用いて構
成された同軸型誘電体共振器の一実施例を示す縦断面
図、第２図は角筒型誘電体ブロックを用いて構成された
同軸型誘電体共振器の一実施例を示す斜視図、第３図は
第２図の同軸型誘電体共振器を基本として構成された多
段型フィルタの斜視図、第４図および第５図はそれぞれ
従来の段差付き同軸型誘電体共振器の斜視図および縦断
面図である。 20,40,50……誘電体共振器、21,41,51a,51b,51c……第
１の誘電体ブロック、22,42,52……第２の誘電体ブロッ
ク、23,43,53a,53b,53c……共振器孔、24,45,55a,55b,5
5c……接合部、16,46,56……導電膜、57a,57b……電界
結合阻止空間。FIG. 1 is a longitudinal sectional view showing an embodiment of a coaxial type dielectric resonator formed by using a cylindrical dielectric block according to the present invention, and FIG. 2 is formed by using a rectangular cylinder type dielectric block. FIG. 3 is a perspective view showing an embodiment of the coaxial dielectric resonator, FIG. 3 is a perspective view of a multistage filter constructed based on the coaxial dielectric resonator shown in FIG. 2, and FIGS. FIG. 3 is a perspective view and a vertical sectional view of a conventional coaxial dielectric resonator with a step, respectively. 20,40,50 …… Dielectric resonator, 21,41,51a, 51b, 51c …… First dielectric block, 22,42,52 …… Second dielectric block, 23,43,53a, 53b, 53c …… Resonator holes, 24,45,55a, 55b, 5
5c ... junction, 16,46,56 ... conductive film, 57a, 57b ... electric field coupling blocking space.
フロントページの続き (56)参考文献 特開 平２−20103（ＪＰ，Ａ) 特開 平１−321701（ＪＰ，Ａ) 特開 昭63−187901（ＪＰ，Ａ) 特開 昭63−184401（ＪＰ，Ａ) 特開 昭62−143502（ＪＰ，Ａ) 特開 昭61−156902（ＪＰ，Ａ) 特開 昭58−108801（ＪＰ，Ａ)Continuation of the front page (56) Reference JP-A-2-20103 (JP, A) JP-A-1-321701 (JP, A) JP-A-63-187901 (JP, A) JP-A-63-184401 (JP , A) JP 62-143502 (JP, A) JP 61-156902 (JP, A) JP 58-108801 (JP, A)
Claims (5)
状の第１の誘電体ブロックと、前記第１の誘電体ブロッ
クとは異なる軸方向長さおよび前記第１の誘電体ブロッ
クの外形横断面形状とほぼ等しい断面形状の貫通孔を有
し、前記第１の誘電体ブロックと底面を揃えて前記第１
の誘電体ブロックを取り囲むように同心配置された筒状
の第２の誘電体ブロックとからなり、両誘電体ブロック
の組立体の、上面を除く全面に導電膜が形成されている
同軸型誘電体共振器。1. A cylindrical first dielectric block having a stepped hole, in which a resonator hole is formed, and an axial length different from that of the first dielectric block and the first dielectric block. Has a through-hole having a cross-sectional shape substantially equal to the outer lateral cross-sectional shape of the first dielectric block, and the bottom surface is aligned with the first dielectric block.
Coaxial second dielectric block concentrically arranged so as to surround the dielectric block, and a conductive film is formed on the entire surface of the assembly of both dielectric blocks except the upper surface. Resonator.
２の誘電体ブロックの比誘電率が互いに異なっている請
求項１に記載の同軸型誘電体共振器。2. The coaxial dielectric resonator according to claim 1, wherein the relative permittivity of the first conductor block and the relative permittivity of the second dielectric block are different from each other.
ブロックはそれぞれ円筒形状をしている請求項１または
２に記載の同軸型誘電体共振器。3. The coaxial dielectric resonator according to claim 1, wherein each of the first dielectric block and the second dielectric block has a cylindrical shape.
ブロックはそれぞれ角筒形状をしている請求項１または
２に記載の同軸型誘電体共振器。4. The coaxial dielectric resonator according to claim 1, wherein each of the first dielectric block and the second dielectric block has a rectangular tube shape.
下部とで異なる直径のものとして形成されている請求項
１ないし４のいずれかに記載の同軸型誘電体共振器。5. The coaxial dielectric resonator according to claim 1, wherein the resonator holes of the first dielectric block are formed to have different diameters in the upper portion and the lower portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2334177A JPH0793527B2 (en) | 1990-11-30 | 1990-11-30 | Coaxial dielectric resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2334177A JPH0793527B2 (en) | 1990-11-30 | 1990-11-30 | Coaxial dielectric resonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04207502A JPH04207502A (en) | 1992-07-29 |
| JPH0793527B2 true JPH0793527B2 (en) | 1995-10-09 |
Family
ID=18274400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2334177A Expired - Lifetime JPH0793527B2 (en) | 1990-11-30 | 1990-11-30 | Coaxial dielectric resonator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0793527B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19741147C1 (en) * | 1997-09-18 | 1998-12-10 | Siemens Matsushita Components | Ceramic filter manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108801A (en) * | 1981-12-22 | 1983-06-29 | Matsushita Electric Ind Co Ltd | Coaxial type dielectric resonator |
| JPS62114512A (en) * | 1985-11-14 | 1987-05-26 | 魚住 早智子 | Roll winding holder |
| JPS63184401A (en) * | 1987-01-26 | 1988-07-29 | Murata Mfg Co Ltd | Incorporated type dielectric filter |
| JPS63187901A (en) * | 1987-01-30 | 1988-08-03 | Murata Mfg Co Ltd | Dielectric filter |
| JPH01321701A (en) * | 1988-06-23 | 1989-12-27 | Matsushita Electric Ind Co Ltd | Coaxial resonator and filter using it |
| JP2682646B2 (en) * | 1988-07-07 | 1997-11-26 | 松下電器産業株式会社 | Coaxial dielectric resonator |
-
1990
- 1990-11-30 JP JP2334177A patent/JPH0793527B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04207502A (en) | 1992-07-29 |
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