JP2000022413A - Dielectric resonator and its frequency setting method - Google Patents

Dielectric resonator and its frequency setting method

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Publication number
JP2000022413A
JP2000022413A JP10184343A JP18434398A JP2000022413A JP 2000022413 A JP2000022413 A JP 2000022413A JP 10184343 A JP10184343 A JP 10184343A JP 18434398 A JP18434398 A JP 18434398A JP 2000022413 A JP2000022413 A JP 2000022413A
Authority
JP
Japan
Prior art keywords
terminal electrode
dielectric
dielectric constant
center conductor
ground
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
JP10184343A
Other languages
Japanese (ja)
Inventor
Tetsuya Umemura
哲也 梅村
Nobunori Mochizuki
宣典 望月
Minoru Takatani
稔 高谷
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP10184343A priority Critical patent/JP2000022413A/en
Publication of JP2000022413A publication Critical patent/JP2000022413A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a dielectric resonator and its frequency setting method where the setting of the frequency is changed without changing an internal structure and its shape and without much reducing the impedance. SOLUTION: A center conductor 1 is built in a dielectric body 2 by a lamination structure and a laminator is formed by sintering it. A hot terminal electrode 5 is formed at one end of the laminator and a ground terminal electrode 6 is formed at the other end. Both ends of the center conductor 1 are connected to the hot terminal electrode and the ground terminal electrode 6. The center conductor 1 opposes to the ground electrodes 3, 4 provided to the laminator via the dielectric layer. A dielectric constant of a material 2a toward the hot terminal electrode 5 of the dielectric body 2 is selected to be relatively higher than that of a material 2b toward the ground terminal electrode 6. The resonance frequency is set by changing a ratio of the width of the high dielectric constant material 2a to that of the low dielectric constant material 2b in the lengthwise direction of the center conductor.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、誘電体内に中心導
体を積層構造により内蔵しかつ焼結した積層体でなる誘
電体共振器とその周波数設定方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric resonator comprising a laminated body in which a center conductor is embedded in a dielectric in a laminated structure and sintered, and a method of setting the frequency thereof.

【0002】[0002]

【従来の技術】例えば携帯電話等の移動体通信に用いら
れる電圧制御発振器に組み込まれた誘電体共振器におい
て、誘電体共振器は使用する周波数帯域の相違に対応し
て共振周波数を設定しなければならない。このような誘
電体共振器を用途に合わせて共振周波数を設定する場
合、従来は中心導体のインダクタンスを変化させるため
に、内部構造や形状を変化させなければならなかった。
例えば実開平5−8805号公報には、中心導体の線路
長を長くするために、誘電体の上下面に対向する導体を
設け、その導体間を誘電体内部で接続して中心導体とす
る例が示されている。また、誘電体共振器を小型化する
ために、高誘電率材料を用いることによって波長短縮を
行うことも行われる。
2. Description of the Related Art For example, in a dielectric resonator incorporated in a voltage controlled oscillator used for mobile communication such as a mobile phone, the resonance frequency of the dielectric resonator must be set in accordance with the difference in the frequency band used. Must. In the case of setting the resonance frequency of such a dielectric resonator in accordance with the application, conventionally, the internal structure and shape had to be changed in order to change the inductance of the center conductor.
For example, Japanese Unexamined Utility Model Publication No. Hei 5-8805 discloses an example in which conductors are provided on the upper and lower surfaces of a dielectric to increase the line length of the central conductor, and the conductors are connected inside the dielectric to form a central conductor. It is shown. Also, in order to reduce the size of the dielectric resonator, the wavelength is shortened by using a high dielectric constant material.

【0003】[0003]

【発明が解決しようとする課題】しかし、前述のよう
に、インダクタンスを変化させるために線路長を変化さ
せるには、中心導体の内部構造や形状を変化させなけれ
ばならず、周波数の設定変更が容易ではないという問題
点があった。また、誘電体材料として誘電率の高い材料
を使用して波長短縮を行う場合は、誘電体共振器のイン
ピーダンスが下がり、Qの低下の要因になっていた。
However, as described above, in order to change the line length in order to change the inductance, it is necessary to change the internal structure and shape of the center conductor. There was a problem that it was not easy. Further, in the case where the wavelength is shortened by using a material having a high dielectric constant as the dielectric material, the impedance of the dielectric resonator decreases, which causes a decrease in Q.

【0004】本発明は、上記問題点に鑑み、内部構造や
形状を変更することなく、かつインピーダンスをそれほ
ど低下させることなく、周波数の設定変更が行える誘電
体共振器とその周波数設定方法を提供することを目的と
する。
[0004] In view of the above problems, the present invention provides a dielectric resonator and a frequency setting method capable of changing the frequency setting without changing the internal structure and shape and without significantly lowering the impedance. The purpose is to:

【0005】[0005]

【課題を解決するための手段】本発明の誘電体共振器
は、誘電体内に中心導体を積層構造により内蔵しかつ焼
結した積層体でなり、前記積層体の一端にホット端子電
極を、他端に接地端子電極を有し、前記中心導体はその
両端を前記ホット端子電極と接地端子電極に接続すると
共に、積層体に設けられた接地電極に誘電体層を介して
対向させ、前記誘電体の前記ホット端子電極側を前記接
地端子電極側より相対的に高誘電率の材料により構成し
たことを特徴とする。
A dielectric resonator according to the present invention is a laminated body in which a center conductor is built in a dielectric and has a laminated structure and is sintered. A hot terminal electrode is provided at one end of the laminated body. A ground terminal electrode is provided at one end, and both ends of the center conductor are connected to the hot terminal electrode and the ground terminal electrode, and the center conductor is opposed to a ground electrode provided on the laminate via a dielectric layer. Wherein the hot terminal electrode side is made of a material having a relatively higher dielectric constant than the ground terminal electrode side.

【0006】このように、誘電体を、ホット端子電極側
に相対的に誘電率の高い材料を用い、接地端子電極側に
誘電率の低い材料を用いれば、全体の形状と中心導体の
構造を変えることなく、その材料の中心導体の長手方向
の幅の比率を変えることにより、共振周波数を変更する
ことが可能となる。
As described above, if the dielectric is made of a material having a relatively high dielectric constant on the side of the hot terminal electrode and a material having a low dielectric constant is used on the side of the ground terminal electrode, the overall shape and the structure of the central conductor are reduced. By changing the ratio of the width of the center conductor of the material in the longitudinal direction without changing, it is possible to change the resonance frequency.

【0007】また、本発明の誘電体共振器の周波数設定
方法は、誘電体内に中心導体を積層構造により内蔵しか
つ焼結した積層体でなり、前記積層体の一端にホット端
子電極を、他端に接地端子電極を有し、前記中心導体は
その両端を前記ホット端子電極と接地端子電極に接続す
ると共に、積層体に設けられた接地電極に誘電体層を介
して対向させた誘電体共振器の周波数を設定する方法で
あって、前記誘電体の前記ホット端子電極側を前記接地
端子電極側より相対的に高誘電率の材料により構成し、
前記中心導体の長さ方向における高誘電率材料と低誘電
体材料との幅の比率を変えることによって共振周波数を
設定することを特徴とする。
Further, the frequency setting method of the dielectric resonator according to the present invention comprises a laminated body in which a center conductor is embedded in a dielectric in a laminated structure and sintered, and a hot terminal electrode is provided at one end of the laminated body. Dielectric resonance having a ground terminal electrode at one end, the center conductor having both ends connected to the hot terminal electrode and the ground terminal electrode, and facing the ground electrode provided on the laminate via a dielectric layer A method of setting the frequency of the device, wherein the hot terminal electrode side of the dielectric is made of a material having a relatively higher dielectric constant than the ground terminal electrode side,
The resonance frequency is set by changing the ratio of the width of the high dielectric constant material to the width of the low dielectric material in the length direction of the center conductor.

【0008】本発明においては、誘電体として、ホット
端子電極側に相対的に誘電率の高い材料を用い、接地端
子電極側に誘電率の低い材料を用いているので、その材
料の中心導体の長手方向の幅の比率を変えることによ
り、中心導体の構造や全体の形状を変更することなく、
共振周波数を変更することが可能となる。
In the present invention, as the dielectric, a material having a relatively high dielectric constant is used on the side of the hot terminal electrode, and a material having a low dielectric constant is used on the side of the ground terminal electrode. By changing the ratio of the width in the longitudinal direction, without changing the structure and overall shape of the center conductor,
It is possible to change the resonance frequency.

【0009】[0009]

【発明の実施の形態】図1(A)は本発明による誘電体
共振器の一実施の形態を示す斜視図、図1(B)、
(C)はそれぞれ図1(A)のE−E断面図、F−F断
面図である。これらの図において、1は誘電体2内に積
層構造により埋設された中心導体、3、4は中心導体1
と誘電体2からなる積層体の下面、上面に形成された接
地電極、5、6は前記中心導体1の長手方向の両端に形
成されたホット端子電極および接地端子電極であり、こ
れらによってλ/4波長型のトリプレート型共振器を構
成する。
FIG. 1A is a perspective view showing an embodiment of a dielectric resonator according to the present invention, and FIG.
(C) is EE sectional drawing and FF sectional drawing of FIG. 1 (A), respectively. In these figures, reference numeral 1 denotes a central conductor embedded in a dielectric 2 in a laminated structure, and reference numerals 3 and 4 denote central conductors 1.
Ground electrodes 5, 5 and 6 formed on the lower surface and the upper surface of the laminated body composed of the central conductor 1 and the dielectric 2 are a hot terminal electrode and a ground terminal electrode formed at both ends in the longitudinal direction of the central conductor 1, respectively. A four-wavelength triplate resonator is formed.

【0010】誘電体2は、ホット端子電極5側の部分2
aが相対的に高誘電率の材料でなり、接地端子電極6側
の部分2bが相対的に低誘電率の材料でなる。具体的に
は、高誘電率材料としてBa−Ti−Nd系セラミック
スで誘電率ε=50〜110のものを用い、低誘電率材
料2bにガラスセラミックス系コンポジットで、誘電率
ε=4〜11のものを用いた。そして、スクリーン印刷
法を用い、積層体を製造した。
[0010] The dielectric 2 has a portion 2 on the hot terminal electrode 5 side.
a is made of a material having a relatively high dielectric constant, and the portion 2b on the ground terminal electrode 6 side is made of a material having a relatively low dielectric constant. Specifically, a Ba-Ti-Nd-based ceramic having a dielectric constant of ε = 50 to 110 is used as the high dielectric constant material, and a glass-ceramic composite having a dielectric constant of ε = 4 to 11 is used as the low dielectric constant material 2b. Was used. And the laminated body was manufactured using the screen printing method.

【0011】この製造工程は次の通りである。まずベー
スフィルムに対する接地電極3となる銀ペーストを、多
数個取りで製造するベースフィルム面について印刷し、
乾燥した。その後、高誘電率材料2aであるセラミック
スを含むペーストの印刷、乾燥と、低誘電率材料2bで
あるセラミックスを含むペーストの印刷、乾燥を繰り返
した。その後中心導体1より上層の高誘電率材料2aで
あるセラミックスを含むペーストの印刷、乾燥と、低誘
電率材料2bであるセラミックスを含むペーストの印刷
を繰り返した。そして、上面の接地電極4としての銀ペ
ーストを印刷、乾燥した。この印刷は、作製するチップ
の個数分について、縦横にパターンを配置して行った。
上記のように積層した積層体を切断、焼成することによ
り、各チップ対応の積層体を作製した。そして、この積
層体の両端にホット端子電極5と接地端子電極6を焼き
付けおよびメッキにより形成した。
This manufacturing process is as follows. First, a silver paste that is to be the ground electrode 3 for the base film is printed on the base film surface to be manufactured in multiple pieces,
Dried. Thereafter, printing and drying of a paste containing ceramics as the high dielectric constant material 2a and printing and drying of a paste containing ceramics as the low dielectric constant material 2b were repeated. Thereafter, printing and drying of a paste containing ceramics as the high dielectric constant material 2a above the center conductor 1 and printing of paste containing ceramics as the low dielectric constant material 2b were repeated. Then, a silver paste as the ground electrode 4 on the upper surface was printed and dried. This printing was performed by arranging patterns in the vertical and horizontal directions for the number of chips to be manufactured.
By cutting and firing the laminated body laminated as described above, a laminated body corresponding to each chip was produced. Then, a hot terminal electrode 5 and a ground terminal electrode 6 were formed on both ends of the laminate by baking and plating.

【0012】作製した誘電体共振器は、誘電体2の中心
導体1の長手方向の長さを3.2mmとした。また、誘電
体2の中心導体1から上面の接地電極4までの厚みH1
と、下面の接地電極3までの高さH2を共に500μm
とした。また、図1(C)に示すチップの幅W1を1.
6mm、中心導体1の幅W2を0.4mmとし、接地電
極3、4の中心導体1の長手方向の長さL3を2.8m
mとした。図1の例では、高誘電率材料2aの中心導体
1の長手方向の幅L1を1.2mmとし、低誘電率材料
2bの中心導体1の長手方向の幅L2を2.0mmとし
た。
In the manufactured dielectric resonator, the length of the center conductor 1 of the dielectric 2 in the longitudinal direction was 3.2 mm. Also, the thickness H1 from the center conductor 1 of the dielectric 2 to the ground electrode 4 on the upper surface
And the height H2 to the ground electrode 3 on the lower surface are both 500 μm.
And The width W1 of the chip shown in FIG.
6 mm, the width W2 of the center conductor 1 is 0.4 mm, and the length L3 of the ground electrodes 3 and 4 in the longitudinal direction of the center conductor 1 is 2.8 m.
m. In the example of FIG. 1, the longitudinal width L1 of the central conductor 1 of the high dielectric constant material 2a is 1.2 mm, and the longitudinal width L2 of the central conductor 1 of the low dielectric constant material 2b is 2.0 mm.

【0013】また、図2(A)、(B)の例では、高誘
電率材料2aの中心導体1の長手方向の幅を2.0mm
とし、低誘電率材料2bの中心導体1の長手方向の幅を
1.2mmとした。その他、高誘電率材料2a、低誘電
率材料2bの各幅を共に1.6mmとしたものを作製し
た。
In the example of FIGS. 2A and 2B, the width of the central conductor 1 of the high dielectric constant material 2a in the longitudinal direction is 2.0 mm.
The width of the center conductor 1 of the low dielectric constant material 2b in the longitudinal direction was 1.2 mm. In addition, a high dielectric constant material 2a and a low dielectric constant material 2b were manufactured in which each width was 1.6 mm.

【0014】図2(C)は、高誘電率材料2aの誘電率
ε=80、低誘電率材料2bの誘電率ε=7とし、かつ
高誘電率材料2aと低誘電率材料2bの各幅L1、L2
の比を変化させた場合の共振周波数の変化を示す図であ
る。図2(C)のf1は、L1=L2=1.6mmの場
合(図1(A)〜(C)の場合)の共振周波数であり、
f1=2.6GHzであった。また、f2はL1=2.
0mm、L2=1.2mmの場合(図2(A)、(B)
の場合)の共振周波数であり、f2=2.1GHzであ
った。また、f3はL1=1.2mm、L2=2.0m
mの場合の共振周波数であり、f3=3.0GHzであ
った。
FIG. 2C shows the dielectric constant ε of the high dielectric constant material 2a = 80, the dielectric constant ε of the low dielectric constant material 2b = 7, and the widths of the high dielectric constant material 2a and the low dielectric constant material 2b. L1, L2
FIG. 6 is a diagram showing a change in resonance frequency when the ratio of the resonance frequency is changed. F1 in FIG. 2C is a resonance frequency when L1 = L2 = 1.6 mm (FIGS. 1A to 1C),
f1 = 2.6 GHz. F2 is L1 = 2.
0 mm, L2 = 1.2 mm (FIGS. 2A and 2B)
), And f2 = 2.1 GHz. Also, f3 is L1 = 1.2 mm, L2 = 2.0 m
The resonance frequency in the case of m was f3 = 3.0 GHz.

【0015】このように、高誘電率材料2aと低誘電率
材料2bの全体の縦幅(中心導体1の長手方向の幅)や
中心導体1の構造を変えることなく、その幅の比を変え
ることによって、中心導体1と接地電極3、4間のキャ
パシタンスを変化させ、共振周波数を変化させることが
できる。
As described above, the ratio of the width of the high-permittivity material 2a to the low-permittivity material 2b is changed without changing the overall vertical width (width in the longitudinal direction of the center conductor 1) or the structure of the center conductor 1. Thereby, the capacitance between the center conductor 1 and the ground electrodes 3, 4 can be changed, and the resonance frequency can be changed.

【0016】本発明を実施する場合、積層体の側面にも
接地電極を設けた構造としてもよく、また、接地電極
3、4や側面の接地電極を誘電体層により覆って保護し
た構造としてもよい。また、ホット端子電極5は端面全
体に設けるのではなく、中心導体1の露出部を覆う程度
の幅としてもよい。
In practicing the present invention, a structure in which a ground electrode is also provided on the side surface of the laminate may be used, or a structure in which the ground electrodes 3, 4 and the ground electrode on the side surface are covered with a dielectric layer and protected. Good. The hot terminal electrode 5 may not be provided on the entire end face, but may have a width enough to cover the exposed portion of the central conductor 1.

【0017】[0017]

【発明の効果】本発明によれば、中心導体を内蔵した誘
電体として、ホット端子電極側に相対的に誘電率の高い
材料を用い、接地端子電極側に誘電率の低い材料を用い
たので、全体の形状と中心導体の構造を変えることな
く、両材料の中心導体の長手方向の幅の比率を変えるこ
とにより、共振周波数を変更することが可能となる。こ
のため、周波数変更への対応が容易となる。また、接地
端子電極側の誘電体は低誘電率材料とすることにより、
インピーダンスの大幅な低下とQの低下を回避すること
ができる。
According to the present invention, a material having a relatively high dielectric constant is used on the hot terminal electrode side and a low dielectric constant material is used on the ground terminal electrode side as the dielectric having the center conductor built therein. The resonance frequency can be changed by changing the ratio of the width of the center conductor of both materials in the longitudinal direction without changing the overall shape and the structure of the center conductor. For this reason, it is easy to respond to the frequency change. Also, the dielectric on the ground terminal electrode side is made of a low dielectric constant material,
A large decrease in impedance and a decrease in Q can be avoided.

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

【図1】(A)は本発明による誘電体共振器の一実施の
形態を示す斜視図、(B)、(C)はそれぞれ(A)の
E−E断面図、F−F断面図である。
FIG. 1A is a perspective view showing an embodiment of a dielectric resonator according to the present invention, and FIGS. 1B and 1C are EE sectional view and FF sectional view of FIG. is there.

【図2】(A)は本発明による誘電体共振器の他の実施
の形態を示す斜視図、(B)はそのG−G断面図、
(C)は高誘電率材料と低誘電率材料の幅の変化に対す
る共振周波数の変化を示す周波数特性図である。
FIG. 2A is a perspective view showing another embodiment of the dielectric resonator according to the present invention, FIG. 2B is a sectional view taken along line GG of FIG.
(C) is a frequency characteristic diagram showing a change in resonance frequency with respect to a change in the width of the high dielectric constant material and the low dielectric constant material.

【符号の説明】[Explanation of symbols]

1:中心導体、2:誘電体、2a:高誘電率材料、2
b:低誘電率材料、3、4:接地電極、5:ホット端子
電極、6:接地端子電極
1: center conductor, 2: dielectric, 2a: high dielectric constant material, 2
b: low dielectric constant material, 3, 4: ground electrode, 5: hot terminal electrode, 6: ground terminal electrode

───────────────────────────────────────────────────── フロントページの続き (72)発明者 高谷 稔 東京都中央区日本橋一丁目13番1号 ティ −ディ−ケイ株式会社内 Fターム(参考) 5J006 HB04 HB21 LA11 LA12 MA05 MA12 MB02 NA07 PB04  ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Minoru Takaya 1-13-1 Nihombashi, Chuo-ku, Tokyo T-D Corporation F-term (reference) 5J006 HB04 HB21 LA11 LA12 MA05 MA12 MB02 NA07 PB04

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】誘電体内に中心導体を積層構造により内蔵
しかつ焼結した積層体でなり、 前記積層体の一端にホット端子電極を、他端に接地端子
電極を有し、 前記中心導体はその両端を前記ホット端子電極と接地端
子電極に接続すると共に、積層体に設けられた接地電極
に誘電体層を介して対向させ、 前記誘電体の前記ホット端子電極側を前記接地端子電極
側より相対的に高誘電率の材料により構成したことを特
徴とする誘電体共振器。
1. A laminated body in which a center conductor is embedded in a dielectric body in a laminated structure and sintered, wherein the laminated body has a hot terminal electrode at one end and a ground terminal electrode at the other end. Both ends thereof are connected to the hot terminal electrode and the ground terminal electrode, and are opposed to a ground electrode provided on the laminate via a dielectric layer, and the hot terminal electrode side of the dielectric is closer to the ground terminal electrode side. A dielectric resonator comprising a material having a relatively high dielectric constant.
【請求項2】誘電体内に中心導体を積層構造により内蔵
しかつ焼結した積層体でなり、 前記積層体の一端にホット端子電極を、他端に接地端子
電極を有し、 前記中心導体はその両端を前記ホット端子電極と接地端
子電極に接続すると共に、積層体に設けられた接地電極
に誘電体層を介して対向させた誘電体共振器の周波数を
設定する方法であって、 前記誘電体の前記ホット端子電極側を前記接地端子電極
側より相対的に高誘電率の材料により構成し、 前記中心導体の長さ方向における高誘電率材料と低誘電
体材料との幅の比率を変えることによって共振周波数を
設定することを特徴とする誘電体共振器の周波数設定方
法。
2. A laminated body in which a center conductor is embedded in a dielectric body by a laminated structure and sintered, wherein the laminated body has a hot terminal electrode at one end and a ground terminal electrode at the other end. A method of setting the frequency of a dielectric resonator having both ends connected to the hot terminal electrode and the ground terminal electrode and facing a ground electrode provided in the laminate via a dielectric layer, The hot terminal electrode side of the body is made of a material having a relatively higher dielectric constant than the ground terminal electrode side, and a width ratio between the high dielectric material and the low dielectric material in the length direction of the center conductor is changed. A frequency setting method for the dielectric resonator.
JP10184343A 1998-06-30 1998-06-30 Dielectric resonator and its frequency setting method Pending JP2000022413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10184343A JP2000022413A (en) 1998-06-30 1998-06-30 Dielectric resonator and its frequency setting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10184343A JP2000022413A (en) 1998-06-30 1998-06-30 Dielectric resonator and its frequency setting method

Publications (1)

Publication Number Publication Date
JP2000022413A true JP2000022413A (en) 2000-01-21

Family

ID=16151634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10184343A Pending JP2000022413A (en) 1998-06-30 1998-06-30 Dielectric resonator and its frequency setting method

Country Status (1)

Country Link
JP (1) JP2000022413A (en)

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