JP2001036311A - Directional coupler - Google Patents
Directional couplerInfo
- Publication number
- JP2001036311A JP2001036311A JP11203152A JP20315299A JP2001036311A JP 2001036311 A JP2001036311 A JP 2001036311A JP 11203152 A JP11203152 A JP 11203152A JP 20315299 A JP20315299 A JP 20315299A JP 2001036311 A JP2001036311 A JP 2001036311A
- Authority
- JP
- Japan
- Prior art keywords
- line
- insulating layer
- directional coupler
- sub
- lines
- 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
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、第１の線路と第２
の線路を絶縁層を介して対向させて第１の線路と第２の
線路を電磁気的に結合させた方向性結合器に関する。The present invention relates to a first line and a second line.
The present invention relates to a directional coupler in which a first line and a second line are electromagnetically coupled with each other so as to face each other via an insulating layer.
【０００２】[0002]
【従来の技術】従来の方向性結合器に、図５に示す様に
誘電体基板の表面に２本の線路を形成して互いに電磁気
的に結合させたものがある。誘電体基板５１の表面に
は、主線路５２と副線路５３が間隔Ｓ２だけ離れて平行
に導電ペーストをスクリーン印刷法で印刷することによ
り形成される。この主線路５２と副線路５３は、互いに
平行した部分の長さＮ２が１／４波長の長さになる様に
構成される。主線路５２の両端部５２ａ、５２ｂと、副
線路５３の両端部５３ａ、５３ｂは、それぞれ誘電体基
板５１の側面に引出される。そして、主線路５２が入出
力端子間に接続され、副線路５３が結合端子と分離端子
間に接続される。2. Description of the Related Art As a conventional directional coupler, there is a directional coupler in which two lines are formed on the surface of a dielectric substrate and electromagnetically coupled to each other as shown in FIG. On the surface of the dielectric substrate 51, a main line 52 and a sub line 53 are formed by printing a conductive paste in parallel at a distance S2 by a screen printing method. The main line 52 and the sub-line 53 are configured such that the length N2 of the portion parallel to each other becomes the length of 1/4 wavelength. Both ends 52 a and 52 b of the main line 52 and both ends 53 a and 53 b of the sub line 53 are led out to the side surfaces of the dielectric substrate 51, respectively. Then, the main line 52 is connected between the input and output terminals, and the sub line 53 is connected between the coupling terminal and the separation terminal.
【０００３】ところで、方向性結合器は、主線路を流れ
ている高周波電力のうち、一方向に進む電力にだけ比例
した出力を、逆方向に進むものに関係なく取り出すこと
ができる。そこで、例えば携帯電話等の移動体通信機器
等では、送信電力を常に一定に保つべく、図６に示す様
に、方向性結合器の主線路５２を送信増幅器６１とアン
テナ６２間に挿入し、方向性結合器の副線路５３の一端
を自動利得制御回路６３に接続し、自動利得制御回路６
３にて送信電力増幅器６１の出力調整を行っている。な
お、６６は入力端子、６７は出力端子、６８は分離端
子、６９は結合端子である。By the way, the directional coupler can extract an output proportional to only the power traveling in one direction from the high-frequency power flowing through the main line, regardless of the power traveling in the opposite direction. Therefore, in a mobile communication device such as a mobile phone, for example, a main line 52 of a directional coupler is inserted between a transmission amplifier 61 and an antenna 62 as shown in FIG. One end of the sub-line 53 of the directional coupler is connected to the automatic gain control circuit 63,
At 3, the output of the transmission power amplifier 61 is adjusted. 66 is an input terminal, 67 is an output terminal, 68 is a separation terminal, and 69 is a coupling terminal.
【０００４】[0004]
【発明が解決しようとする課題】この様な従来の方向性
結合器は、主線路と副線路が同じ平面で対向しているの
で、主線路と副線路の対向する面積が小さく、主線路と
副線路間の容量性結合が小さい。そのため、従来の方向
性結合器は、２つの線路の線幅Ｗ２と２つの線路間の間
隔Ｓ２のばらつきによって方向性結合器の特性が大きく
変動するという問題があった。また、方向性結合器に接
続される周辺の回路に存在する浮遊容量の変動の影響を
受けて特性が劣化しやすいという問題があった。また、
この種の方向性結合器は、移動体通信機器の小型化に伴
い小型化が望まれている。従来の方向性結合器は、２つ
の線路の互いに平行した部分の長さを１／４波長の長さ
にした状態で、２つの線路の線幅Ｗ２と２つの線路間の
間隔Ｓ２を調節することにより、主な特性を決定してお
り、特性を劣化させることなく小型化しようとすると２
つの線路間の間隔Ｓ２を狭くする必要がある。この様な
状況の中で、従来の方向性結合器の２つの線路間の間隔
を小さくしようとした場合、従来の方向性結合器は、２
つの線路をスクリーン印刷法で形成しているので、２つ
の線路間の間隔を小さくするのには限界があった。In such a conventional directional coupler, the main line and the sub-line face each other on the same plane, so that the area where the main line and the sub-line oppose each other is small, and the main line and the sub-line are small. Capacitive coupling between sub-lines is small. Therefore, the conventional directional coupler has a problem that the characteristics of the directional coupler greatly vary due to variations in the line width W2 of the two lines and the interval S2 between the two lines. Further, there is a problem that the characteristics are easily deteriorated due to the influence of the fluctuation of the stray capacitance existing in the peripheral circuit connected to the directional coupler. Also,
This type of directional coupler is desired to be downsized with the downsizing of mobile communication devices. The conventional directional coupler adjusts the line width W2 of the two lines and the spacing S2 between the two lines, with the length of the parallel portions of the two lines being set to １ ／ wavelength. As a result, the main characteristics are determined, and if it is attempted to reduce the size without deteriorating the characteristics, 2
It is necessary to reduce the interval S2 between the two lines. In such a situation, if an attempt is made to reduce the distance between two lines of the conventional directional coupler, the conventional directional coupler has a problem that the conventional directional coupler has two lines.
Since the two lines are formed by screen printing, there is a limit to reducing the distance between the two lines.
【０００５】本発明は、形状を小型化できると共に、特
性を改善できる方向性結合器を提供することを目的とす
る。SUMMARY OF THE INVENTION An object of the present invention is to provide a directional coupler capable of reducing the size and improving the characteristics.
【０００６】[0006]
【課題を解決するための手段】本発明の方向性結合器
は、第１の絶縁層の表面に第１の線路を形成し、第２の
絶縁層の表面に第２の線路を形成し、第１の線路と第２
の線路が電磁気的に結合する様に第２の絶縁層を介して
第１の線路と第２の線路を対向させ、第１の線路と第２
の線路の対向している部分の長さを１／４波長よりも短
い長さにする。この第１の線路の両端が絶縁層の積層体
の同一側面に引出され、第２の線路の両端が絶縁層の積
層体の同一側面に引出され、かつ、第１の線路の両端と
該第２の線路の両端が絶縁層の積層体の互いに反対側の
面に引き出される。According to the directional coupler of the present invention, a first line is formed on a surface of a first insulating layer, and a second line is formed on a surface of a second insulating layer. The first track and the second
The first line and the second line are opposed to each other via a second insulating layer so that the first line and the second line are electromagnetically coupled to each other.
The length of the opposing portion of the line is made shorter than １ ／ wavelength. Both ends of the first line are led out to the same side of the laminate of insulating layers, both ends of the second line are led out to the same side of the laminate of insulating layers, and both ends of the first line are connected to both ends of the first line. Both ends of the second line are led out to the opposite surfaces of the laminate of insulating layers.
【０００７】[0007]
【発明の実施の形態】本発明の方向性結合器は、第１の
絶縁層の表面に第１の線路が形成され、第２の絶縁層の
表面に第２の線路が形成される。第１の線路と第２の線
路は、互いに電磁気的に結合する様に第２の絶縁層を介
して第１の線路と第２の線路を対向させ、第１の線路と
第２の線路の対向している部分の長さを１／４波長より
短い長さ、望ましくは１／８波長よりも短い長さにす
る。この様な方向性結合器は、第１の線路と第２の線路
の対向している部分の長さを使用周波数よりも十分短く
しているので、集中定数回路と見ることができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In a directional coupler according to the present invention, a first line is formed on a surface of a first insulating layer, and a second line is formed on a surface of a second insulating layer. The first line and the second line are opposed to each other via the second insulating layer so that the first line and the second line are electromagnetically coupled to each other. The length of the facing portion is set to a length shorter than １ ／ wavelength, preferably shorter than ８ wavelength. Such a directional coupler can be regarded as a lumped-constant circuit because the length of the opposing portion of the first line and the second line is sufficiently shorter than the operating frequency.
【０００８】[0008]
【実施例】以下、本発明の方向性結合器を図１から図４
を参照して説明する。図１は本発明の方向性結合器の実
施例を示す分解斜視図、図２は本発明の方向性結合器の
実施例を示す斜視図、図３は図２の上面から内部を透視
した状態を示す上面図、図４は図３の断面図である。図
１乃至図４において、１１は第１の絶縁層、１２は主線
路、１３は副線路、１４は第２の絶縁層である。第１の
絶縁層１１は、アルミナ等の誘電体や、フェライト等の
磁性体等で形成した基板によって形成される。第１の絶
縁層１１の表面には、主線路１２が形成される。主線路
１２は、第１の絶縁層１１の表面に厚膜エッチング工法
により形成され、両端部１２ａ、１２ｂが絶縁層１１の
突出した部分の端面まで引出されて全体としてコ字形に
形成される。この第１の絶縁層１１の上に、誘電体や、
磁性体等で形成した絶縁シートを積層して第２の絶縁層
１４が形成される。第２の絶縁層１４は、その表面に副
線路１３が形成される。副線路１３は、第２の絶縁層１
４の表面に厚膜エッチング工法により形成され、両端部
１３ａ、１３ｂが絶縁層１４の突出した部分の端面まで
引出されて全体としてコ字形に形成される。この第２の
絶縁層１４の上に、誘電体や、磁性体等で形成した絶縁
シートを積層して保護用絶縁層１５が形成される。これ
らが積層された積層体は、表面形状がＨ字状になってい
る。主線路１２と副線路１３は、図３、図４に示す様に
両端部以外が第２の絶縁層１４を介して対向して電磁気
的に結合しており、この対向している部分の長さＮ１が
使用する周波数の１／４波長よりも短く設定される。主
線路１２の両端と副線路１３の両端は、互いに反対方向
に延在させて積層体の互いに対向する端面に引出され
る。そして、主線路１２が入力端子１６と出力端子１７
間に接続され、副線路１３の一端１３ａが結合端子１８
に、副線路の他端１３ｂが分離端子１９に接続される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a directional coupler according to the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 1 is an exploded perspective view showing an embodiment of the directional coupler of the present invention, FIG. 2 is a perspective view showing an embodiment of the directional coupler of the present invention, and FIG. FIG. 4 is a cross-sectional view of FIG. 1 to 4, reference numeral 11 denotes a first insulating layer, 12 denotes a main line, 13 denotes a sub line, and 14 denotes a second insulating layer. The first insulating layer 11 is formed of a substrate formed of a dielectric such as alumina, a magnetic material such as ferrite, or the like. The main line 12 is formed on the surface of the first insulating layer 11. The main line 12 is formed on the surface of the first insulating layer 11 by a thick film etching method, and both end portions 12a and 12b are drawn out to the end surfaces of the protruding portions of the insulating layer 11 to be formed in a U-shape as a whole. On this first insulating layer 11, a dielectric,
The second insulating layer 14 is formed by laminating insulating sheets made of a magnetic material or the like. The sub-line 13 is formed on the surface of the second insulating layer 14. The sub-line 13 is formed of the second insulating layer 1
4 is formed on the surface of the insulating layer 14 by a thick film etching method, and both end portions 13a and 13b are drawn out to the end surface of the protruding portion of the insulating layer 14 to form a U-shape as a whole. An insulating sheet made of a dielectric material, a magnetic material, or the like is laminated on the second insulating layer 14 to form a protective insulating layer 15. The surface of the laminate in which these are laminated is H-shaped. As shown in FIGS. 3 and 4, the main line 12 and the sub-line 13 are electromagnetically coupled to each other except for both ends via the second insulating layer 14. N1 is set to be shorter than １ ／ wavelength of the frequency used. Both ends of the main line 12 and both ends of the sub-line 13 extend in opposite directions and are drawn to mutually facing end surfaces of the laminate. The main line 12 has an input terminal 16 and an output terminal 17.
One end 13a of the sub-line 13 is connected to the coupling terminal 18
The other end 13b of the sub-line is connected to the separation terminal 19.
【０００９】この様に形成された方向性結合器は、例え
ば、絶縁層を誘電率が９の材料を用いて形成した場合、
８００ＭＨｚにおける１／４波長は３１．２８ｍｍ、１
／８波長は１５．６１ｍｍとなる。この方向性結合器を
８００〜１０００ＭＨｚで使用する場合、例えば、主線
路１２と副線路１３の対向している部分の長さＮ１を８
００ＭＨｚの１／８波長よりも短い約１／２０波長の
１．３ｍｍに設定し、主線路１２の線幅Ｗ１と副線路１
３の線幅Ｗ１を６０μｍ、第２の絶縁層１４の厚みＨを
１６μｍに設定したところ、８００〜１０００ＭＨｚに
おいて約２０ｄＢの結合度が得られた。また、この時の
方向性結合器の大きさは、１．６×１．６×０．５ｍｍ
となった。なお、この主線路１２と副線路１３の結合度
は、第２の絶縁層１４の厚みＨ及び２つの線路の線幅Ｗ
１を変えることにより調整できる。この様な方向性結合
器は、従来と同様に、主線路が送信増幅器とアンテナ間
に挿入され、副線路の一端が自動利得制御回路に接続さ
れる。このとき、図７に示す様に方向性結合器に接続さ
れる周辺回路に、８００ＭＨｚにおいて０．２ｐＦの浮
遊容量Ｃｏが発生した場合、浮遊容量が発生しない時の
特性と比較すると図８の様になり、本発明の方向性結合
器は、従来のものよりも周辺回路の浮遊容量の変動によ
る影響が小さくなっている。In the directional coupler thus formed, for example, when the insulating layer is formed using a material having a dielectric constant of 9,
The quarter wavelength at 800 MHz is 31.28 mm, 1
The / 8 wavelength is 15.61 mm. When this directional coupler is used at 800 to 1000 MHz, for example, the length N1 of the opposing portion of the main line 12 and the sub line 13 is set to 8
The wavelength is set to 1.3 mm, which is about 1/20 wavelength shorter than 1/8 wavelength of 00 MHz, and the line width W1 of the main line 12 and the sub line 1
When the line width W1 of No. 3 was set to 60 μm and the thickness H of the second insulating layer 14 was set to 16 μm, a coupling degree of about 20 dB was obtained at 800 to 1000 MHz. At this time, the size of the directional coupler is 1.6 × 1.6 × 0.5 mm.
It became. The degree of coupling between the main line 12 and the sub line 13 is determined by the thickness H of the second insulating layer 14 and the line width W of the two lines.
It can be adjusted by changing 1. In such a directional coupler, the main line is inserted between the transmission amplifier and the antenna, and one end of the sub line is connected to the automatic gain control circuit, as in the related art. At this time, when a stray capacitance Co of 0.2 pF is generated at 800 MHz in a peripheral circuit connected to the directional coupler as shown in FIG. Thus, the directional coupler of the present invention is less affected by the fluctuation of the stray capacitance of the peripheral circuit than the conventional directional coupler.
【００１０】以上、本発明の方向性結合器の実施例を述
べたが、本発明はこの実施例に限られるものではない。
例えば、第２の絶縁層に主線路が設けられ、第１の絶縁
層に副線路が設けられてもよい。また、主線路と副線路
は、実施例では全体としてコ字形に形成されているが、
対向する部分の長さが１／４波長よりも短い長さであれ
ばよく、ミアンダー形、渦巻形等に形成されてもよい。Although the embodiment of the directional coupler of the present invention has been described above, the present invention is not limited to this embodiment.
For example, the main line may be provided in the second insulating layer, and the sub-line may be provided in the first insulating layer. In addition, the main line and the sub line are formed in a U-shape as a whole in the embodiment,
It is sufficient that the length of the opposing portion is shorter than a quarter wavelength, and it may be formed in a meander shape, a spiral shape, or the like.
【００１１】[0011]
【発明の効果】本発明の方向性結合器は、第１の絶縁層
の表面に第１の線路を形成し、第２の絶縁層の表面に第
２の線路を形成し、第１の線路と第２の線路が結合する
様に第２の絶縁層を介して第１の線路と第２の線路を対
向させ、第１の線路と第２の線路の対向している部分の
長さを１／４波長よりも短い長さにしたので、第１の線
路と第２の線路間の容量性結合を大きくすることができ
る。また、本発明の方向性結合器は、第１の線路と第２
の線路が結合する様に第２の絶縁層を介して第１の線路
と第２の線路を対向させたので、底面積を小さくできる
と共に、第２の絶縁層の厚みによっても第１の線路と第
２の線路の結合を調整できる。従って、本発明の方向性
結合器は、従来のものよりも形状を小型化できると共
に、特性を改善できる。さらに、本発明の方向性結合器
は、集中定数回路として扱えるので設計がしやすくな
る。According to the directional coupler of the present invention, a first line is formed on a surface of a first insulating layer, and a second line is formed on a surface of a second insulating layer. The first line and the second line are opposed to each other via a second insulating layer so that the first line and the second line are coupled to each other, and the length of the opposed portion of the first line and the second line is reduced. Since the length is shorter than 短 い wavelength, the capacitive coupling between the first line and the second line can be increased. Further, the directional coupler of the present invention includes the first line and the second line.
Since the first line and the second line are opposed to each other with the second insulating layer interposed therebetween so that the two lines can be coupled to each other, the bottom area can be reduced, and the first line can also be changed depending on the thickness of the second insulating layer. And the second line can be adjusted. Therefore, the directional coupler of the present invention can be made smaller in size and improved in characteristics than the conventional one. Further, the directional coupler of the present invention can be handled as a lumped constant circuit, so that the design becomes easy.
【図１】 本発明の方向性結合器の実施例を示す分解斜
視図である。FIG. 1 is an exploded perspective view showing an embodiment of a directional coupler of the present invention.
【図２】 本発明の方向性結合器の実施例を示す斜視図
である。FIG. 2 is a perspective view showing an embodiment of the directional coupler of the present invention.
【図３】 図２の上面から内部を透視した状態を示す上
面図である。FIG. 3 is a top view showing a state where the inside is seen through from the top surface of FIG. 2;
【図４】 図３の断面図である。FIG. 4 is a sectional view of FIG. 3;
【図５】 従来の方向性結合器の上面図である。FIG. 5 is a top view of a conventional directional coupler.
【図６】 方向性結合器が用いられる回路の回路図であ
る。FIG. 6 is a circuit diagram of a circuit using a directional coupler.
【図７】 方向性結合器の回路図である。FIG. 7 is a circuit diagram of a directional coupler.
【図８】 従来のものと本発明の方向性結合器の特性比
較表である。FIG. 8 is a characteristic comparison table between a conventional one and a directional coupler of the present invention.
１１ 第１の絶縁層 １２ 主線路 １３ 副線路 １４ 第２の絶縁層 DESCRIPTION OF SYMBOLS 11 1st insulating layer 12 Main line 13 Sub line 14 2nd insulating layer
Claims (2)
し、第２の絶縁層の表面に第２の線路を形成し、該第１
の線路と該第２の線路が電磁気的に結合する様に該第２
の絶縁層を介して該第１の線路と該第２の線路を対向さ
せ、該第１の線路と該第２の線路の対向している部分の
長さを１／４波長よりも短い長さにしたことを特徴とす
る方向性結合器。1. A first line is formed on a surface of a first insulating layer, and a second line is formed on a surface of a second insulating layer.
So that the second line and the second line are electromagnetically coupled to each other.
The first line and the second line are opposed to each other via the insulating layer of the above, and the length of the opposing portion of the first line and the second line is shorter than １ ／ wavelength. A directional coupler, characterized in that:
し、第２の絶縁層の表面に第２の線路を形成し、該第１
の線路と該第２の線路が電磁気的に結合する様に該第２
の絶縁層を介して該第１の線路と該第２の線路を対向さ
せ、該第１の線路の両端が絶縁層の積層体の同一側面に
引出され、該第２の線路の両端が絶縁層の積層体の同一
側面に引出され、かつ、該第１の線路の両端と該第２の
線路の両端が絶縁層の積層体の互いに反対側の面に引き
出され、第１の線路と第２の線路の対向している部分の
長さを１／４波長よりも短い長さにしたことを特徴とす
る方向性結合器。2. A first line is formed on a surface of a first insulating layer, and a second line is formed on a surface of a second insulating layer.
So that the second line and the second line are electromagnetically coupled to each other.
The first line and the second line are opposed to each other via an insulating layer, and both ends of the first line are led out to the same side surface of the laminate of insulating layers, and both ends of the second line are insulated. Both ends of the first line and both ends of the second line are drawn out on opposite sides of the insulating layer stack, and the first line and the second line are drawn out to the same side surface of the layer stack. 2. The directional coupler according to claim 1, wherein the length of the opposing portion of the second line is shorter than 1/4 wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11203152A JP2001036311A (en) | 1999-07-16 | 1999-07-16 | Directional coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11203152A JP2001036311A (en) | 1999-07-16 | 1999-07-16 | Directional coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001036311A true JP2001036311A (en) | 2001-02-09 |
Family
ID=16469299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11203152A Pending JP2001036311A (en) | 1999-07-16 | 1999-07-16 | Directional coupler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001036311A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004062026A1 (en) * | 2002-12-18 | 2004-07-22 | Analog Devices, Inc. | Reduced size microwave directional coupler |
| KR100981524B1 (en) * | 2001-12-20 | 2010-09-10 | 엔엑스피 비 브이 | Coupler, integrated electronic component and electronic device |
| JP2012516132A (en) * | 2009-01-22 | 2012-07-12 | クアルコム，インコーポレイテッド | Detection of impedance change in wireless power transmission |
-
1999
- 1999-07-16 JP JP11203152A patent/JP2001036311A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100981524B1 (en) * | 2001-12-20 | 2010-09-10 | 엔엑스피 비 브이 | Coupler, integrated electronic component and electronic device |
| WO2004062026A1 (en) * | 2002-12-18 | 2004-07-22 | Analog Devices, Inc. | Reduced size microwave directional coupler |
| US6825738B2 (en) | 2002-12-18 | 2004-11-30 | Analog Devices, Inc. | Reduced size microwave directional coupler |
| JP2012516132A (en) * | 2009-01-22 | 2012-07-12 | クアルコム，インコーポレイテッド | Detection of impedance change in wireless power transmission |
| US9136914B2 (en) | 2009-01-22 | 2015-09-15 | Qualcomm Incorporated | Impedance change detection in wireless power transmission |
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