JPH0321003A - Transmission line transformer - Google Patents
Transmission line transformerInfo
- Publication number
- JPH0321003A JPH0321003A JP15601489A JP15601489A JPH0321003A JP H0321003 A JPH0321003 A JP H0321003A JP 15601489 A JP15601489 A JP 15601489A JP 15601489 A JP15601489 A JP 15601489A JP H0321003 A JPH0321003 A JP H0321003A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- line
- circuits
- circuit
- patterns
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- 239000011162 core material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【発明の詳細な説明】
く本発明の産業上の利用分野〉
本発明は高周波回路に用いられる伝送線路トランスに関
する。DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field of the Present Invention The present invention relates to a transmission line transformer used in a high frequency circuit.
く従来技術〉
高周波回路において伝送線路トランスは、主にインピー
ダンス変換や位相反転等の目的で用いられている。Prior Art In high-frequency circuits, transmission line transformers are mainly used for purposes such as impedance conversion and phase inversion.
第9図は、2組の伝送線路トランスT1、T2を用いて
、1対4のインピーダンス変換回路を構成した回路図で
あり、端子1、2間に接続される回路のインピーダンス
Zに対して、端子3、4間に接続される回路のインピー
ダンスを4・Zにすると、その回路間の信号伝送を最も
損失の少ない状態で行なうことができる(ただし、伝送
線路トランスT1、T2の特性インピーダンスは2・Z
とする〉。FIG. 9 is a circuit diagram configuring a 1:4 impedance conversion circuit using two sets of transmission line transformers T1 and T2, and for the impedance Z of the circuit connected between terminals 1 and 2, If the impedance of the circuit connected between terminals 3 and 4 is set to 4.Z, signal transmission between the circuits can be performed with the least loss (however, the characteristic impedance of transmission line transformers T1 and T2 is 2.・Z
>.
2組の伝送回路トランスTI、T2は、例えば2本の導
線を隣接させた状態でインダクタンスを形或するように
構成されており、その線路長に比べて低い周波数の信号
に対しては分布定数回路、線路長に近い周波数信号に対
しては集中定数回路として作動し、このため広帯域な信
号伝送が可能となっている。The two sets of transmission circuit transformers TI and T2 are configured to form an inductance by, for example, two conductive wires adjacent to each other, and a distributed constant is applied to signals with a frequency lower than the line length. It operates as a lumped constant circuit for frequency signals close to the circuit or line length, making wideband signal transmission possible.
特に広帯域な信号伝送を効率J:<行なうためには、短
かい線路で大きなインダクタンスを形成する必要があり
、このため透磁率の大きなコア材に導線を巻いたり、第
10図のように同軸ケーブル6、6を円筒状のコア7、
7に通して伝送線路トランスを形成し、広帯域で使用で
きるようにしている(8は回路基板、9は中継端子)。In order to achieve especially efficient broadband signal transmission, it is necessary to form a large inductance with a short line, so it is necessary to wind the conductor around a core material with high magnetic permeability, or use a coaxial cable as shown in Figure 10. 6, 6 is a cylindrical core 7,
7 to form a transmission line transformer so that it can be used in a wide band (8 is a circuit board, 9 is a relay terminal).
く発明が解決しようとする課題〉
しかしながら、前記のような伝送線路1・ランスは、同
軸ケーブル6(あるいは導線)の末端部の処理が煩雑で
他の回路への実装が均一になりにくく、伝送線路のイン
ピーダンスがこの末端部の処理により高い周波数で大き
く変化してしまい、高い周波数での伝送特性が回路によ
って著しく異なってしまうという問題があった。Problems to be Solved by the Invention> However, with the transmission line 1 and lance as described above, processing of the end of the coaxial cable 6 (or conducting wire) is complicated, making it difficult to uniformly mount the coaxial cable 6 (or conductor) on other circuits, There is a problem in that the impedance of the line changes significantly at high frequencies due to this treatment at the end, and the transmission characteristics at high frequencies differ significantly depending on the circuit.
特に数100MHzから数GHZ程度の信号伝送を前記
のような伝送線路トランスで行なおうとした場合、回路
毎の調整が必要となり、量産性が著しく低くなってしま
う。In particular, when attempting to transmit signals from several 100 MHz to several GHz using a transmission line transformer such as the one described above, adjustment is required for each circuit, which significantly reduces mass productivity.
本発明はこの課題を解決した伝送線路トランスを提供す
ることを目的としている。An object of the present invention is to provide a transmission line transformer that solves this problem.
く課題を解決するための手段〉
前記課題を解決するために本発明の伝送線路トランスは
、
所定の誘電率と厚さの可撓性基板の両面に重なり合うよ
うにそれぞれ形成されて所望の特性インピーダンスを有
する線路パターンと、この線路パターンに接続された入
出力接続パターンとを備えている。Means for Solving the Problems> In order to solve the above problems, the transmission line transformer of the present invention is provided by forming a flexible substrate having a predetermined dielectric constant and thickness so as to overlap each other on both sides thereof, thereby achieving a desired characteristic impedance. and an input/output connection pattern connected to the line pattern.
く作用〉
したがって、この伝送線路トランスは、可撓性を有し、
所望の特性インピーダンスをもって入出力接続パターン
を介して他回路に接続することができ、量産性が高く、
他回路への実装を容易に行なうことができる。Therefore, this transmission line transformer has flexibility,
It can be connected to other circuits via the input/output connection pattern with the desired characteristic impedance, and has high mass productivity.
It can be easily mounted on other circuits.
く本発明の実施例〉(第1〜3図) 以下、図面に基づいて本発明の一実施例を説明する。Examples of the present invention> (Figures 1 to 3) Hereinafter, one embodiment of the present invention will be described based on the drawings.
第1図は本発明の伝送線路トランスを用いた1対4のイ
ンピーダンス変換回路(以下、変換回路と記す)の構造
を示す正面図であり、第2図は第1図の背面図である。FIG. 1 is a front view showing the structure of a 1:4 impedance conversion circuit (hereinafter referred to as a conversion circuit) using the transmission line transformer of the present invention, and FIG. 2 is a rear view of FIG. 1.
また、第3図はパターン部のみを示す斜視図、第4図は
一実施例の等価回路を示す図である。Further, FIG. 3 is a perspective view showing only the pattern portion, and FIG. 4 is a diagram showing an equivalent circuit of one embodiment.
この変換回路は、可撓性および耐熱性に富むボリイミド
樹脂フィルムからなるほぼ正方形状の基板1oの両面に
、2組の伝送線路トランスT3、T4をエッチングによ
りパターン化したものである。This conversion circuit has two sets of transmission line transformers T3 and T4 patterned by etching on both sides of a substantially square substrate 1o made of a polyimide resin film with high flexibility and heat resistance.
第1の伝送線路トランスT3は、接着剤等を含む等価誘
電率が3.5で厚さ50μmの基板10の両面に重なり
合うように形成されたコの字状の線路パターン[1、L
2によって構成されており、同様に第2の伝送線路トラ
ンスT4は、線路バターンL1、L2とほぼ対称にコの
字状に形或された線路パターンL3、し4によって構威
されている。The first transmission line transformer T3 has a U-shaped line pattern [1, L
Similarly, the second transmission line transformer T4 is constituted by line patterns L3 and L4 which are U-shaped and substantially symmetrical to the line patterns L1 and L2.
各線路パターンし1〜L4は、伝送線路トランスT3、
T4の特性インピーダンスがほぼ25Ωになるように、
線路幅W約4mmに設定されており、線路長lは、2.
5GH.Zの1/4波長に相当する約3Qmmに設定さ
れている。Each line pattern 1 to L4 is a transmission line transformer T3,
So that the characteristic impedance of T4 is approximately 25Ω,
The line width W is set to approximately 4 mm, and the line length l is set to 2.
5GH. It is set to approximately 3Qmm, which corresponds to 1/4 wavelength of Z.
線路パターンL1の一端L1aと線路パターンL3の一
端L3aおよび線路パターンし2の一端L2aと線路パ
ターンし4の一端L4aとはそれ5
ぞれスルーホール加工で接続されており、線路パターン
L2、L3の他端側はパターン接続され、第4図の等価
回路に示す接続がなされている。One end L1a of the line pattern L1, one end L3a of the line pattern L3, one end L2a of the line pattern 2, and one end L4a of the line pattern 4 are connected by through-hole processing, respectively, and the line patterns L2 and L3 are connected to each other by through-hole processing. The other end side is pattern-connected, and the connections shown in the equivalent circuit of FIG. 4 are made.
また、線路パターンL1、L4の両端L1a、L1b,
L4a,L4bには、基板10の端まで延びた接続導体
11、12、13、14がパターン形或されている。Also, both ends L1a, L1b, of the line patterns L1, L4,
Connection conductors 11, 12, 13, and 14 extending to the ends of the substrate 10 are patterned on L4a and L4b.
したがって、接続導体11、12にインピーダンス12
.5Ωの回路を接続し、接続導休13、14にインピー
ダンス50Ωの回路を接続した場合、この回路間の信号
伝送を損失の少ない状態で広帯域(数100MHzから
2GHZ)に行なうことができる。Therefore, the impedance 12 in the connecting conductors 11 and 12
.. When a 5Ω circuit is connected and a circuit with an impedance of 50Ω is connected to the connection conductors 13 and 14, signal transmission between the circuits can be performed over a wide band (several 100 MHz to 2 GHz) with little loss.
この変換回路を実装する場合、第5図(a)に示すよう
に基板10の一方側の接続導体11、12を回路基板2
0上にはんだ付けし、基板10を湾曲させて他方側の接
続導体13、14を回路基板2o上にはんだ付けすれば
、実装面積を少なくすることができる。また、第5図(
b)に示すように、回路基板20一に設けた穴21を塞
ぐよう6
に、基板10を水平に実装することもできる。When mounting this conversion circuit, the connection conductors 11 and 12 on one side of the board 10 are connected to the circuit board 2 as shown in FIG.
If the connecting conductors 13 and 14 on the other side are soldered onto the circuit board 2o by curving the board 10 and soldering them onto the circuit board 2o, the mounting area can be reduced. Also, Figure 5 (
As shown in b), the board 10 can also be mounted horizontally so as to close the hole 21 provided in the circuit board 20.
なお、この実施例で線路パターンL2、L3の接続部に
接続導体15を設け、位相反転回路として用いることも
可能である。In addition, in this embodiment, it is also possible to provide a connection conductor 15 at the connection portion of the line patterns L2 and L3 and use it as a phase inversion circuit.
く本発明の他の実施例〉
なお、前記実施例では、伝送線路l・ランスを、コの字
状の線路パターンで形成していたが、第6図、第7図に
その正面および背面を示すように円環状の線路パターン
L5、L6および線路パターンL7、L8で21llの
伝送線路1・ランスを形戒するようにしてもよい。Other Embodiments of the Present Invention In the above embodiments, the transmission line L/lance was formed with a U-shaped line pattern, but the front and rear views are shown in FIGS. 6 and 7. As shown, a 21 liter transmission line 1/lance may be formed using annular line patterns L5, L6 and line patterns L7, L8.
また、前記実施例では、基板10としてポリイミド樹脂
フィルムを用いていたが、これは本発明を限定するもの
ではなく、ポリエステルフィルムやガラスエボキシフィ
ルム等を用いるようにしてもよい。Further, in the above embodiment, a polyimide resin film was used as the substrate 10, but this does not limit the present invention, and a polyester film, a glass epoxy film, or the like may be used.
また前記実施例では数’loOMHz以上から数GHz
までの信号を伝送する場合について説明したが、第8図
に示すように線路パターンL9、L10に折返し部を設
けて線路長を増せば、より低い周波数まで帯域を広げる
ことができる(背面図省略)。In addition, in the above embodiment, the range from several'loOMHz to several GHz
Although we have explained the case of transmitting signals up to ).
〈本発明の効果〉
本発明の伝送線路トランスは、可撓性基板の両面に重な
り合うように形成されて所望の特性インピーダンスとな
る線路パターンによって構威され、他回路との接続のた
めの入出力接続パターンを有しているため、末端部の煩
雑な調整が不要となり、均一な特性が得られ、他回路と
の接続が極めて容易となり量産性も格段に向上する。<Effects of the Present Invention> The transmission line transformer of the present invention is constituted by a line pattern that is formed so as to overlap on both sides of a flexible substrate and has a desired characteristic impedance, and has an input/output line for connection with other circuits. Since it has a connection pattern, there is no need for complicated adjustment of the end portion, uniform characteristics can be obtained, connection with other circuits is extremely easy, and mass productivity is greatly improved.
第1図は、本発明を適用した回路の外観を示す正面図、
第2図は第1図の背面図、第3図は一実施例の要部を示
す斜視図、第4図は一実施例の等価回路図である。
第5図(a)は一実施例の回路の実装方法を説明するた
めの斜視図、第5図(b)は一実施例の他の実装方法を
説明するための断面図、第6図は本発明の他の実施例を
示す正面図、第7図は第6図の背面図である。
第8図は本発明の他の実施例を示す正面図である。
第9図は伝送線路トランスを用いた回路の一例を示す図
、第10図は従来の伝送線路トランスを示す斜視図であ
る。
10・・・・・・基板、T3、T4・・・・・・伝、送
線路トランス、し1〜L4・・・・・・線路パターン。FIG. 1 is a front view showing the appearance of a circuit to which the present invention is applied;
2 is a rear view of FIG. 1, FIG. 3 is a perspective view showing essential parts of one embodiment, and FIG. 4 is an equivalent circuit diagram of one embodiment. FIG. 5(a) is a perspective view for explaining a circuit mounting method of one embodiment, FIG. 5(b) is a sectional view for explaining another mounting method of one embodiment, and FIG. FIG. 7 is a front view showing another embodiment of the present invention, and FIG. 7 is a rear view of FIG. 6. FIG. 8 is a front view showing another embodiment of the present invention. FIG. 9 is a diagram showing an example of a circuit using a transmission line transformer, and FIG. 10 is a perspective view showing a conventional transmission line transformer. 10... Board, T3, T4... Transmission, transmission line transformer, 1 to L4... Line pattern.
Claims (1)
ようにそれぞれ形成されて所望の特性インピーダンスを
有する線路パターンと、 前記線路パターンに接続された入出力接続パターンとを
備えたことを特徴とする伝送線路トランス。[Scope of Claims] A line pattern having a desired characteristic impedance and formed so as to overlap each other on both sides of a flexible substrate having a predetermined dielectric constant and thickness; and an input/output connection pattern connected to the line pattern. A transmission line transformer characterized by being equipped with.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15601489A JPH0321003A (en) | 1989-06-19 | 1989-06-19 | Transmission line transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15601489A JPH0321003A (en) | 1989-06-19 | 1989-06-19 | Transmission line transformer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0321003A true JPH0321003A (en) | 1991-01-29 |
Family
ID=15618433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15601489A Pending JPH0321003A (en) | 1989-06-19 | 1989-06-19 | Transmission line transformer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0321003A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09232147A (en) * | 1996-02-22 | 1997-09-05 | Nec Corp | Transmission line transformer |
DE19810617B4 (en) * | 1997-03-12 | 2006-04-27 | Lg Electronics Inc. | Hybrid transformer for HF mixers in printed circuit |
JP2007012920A (en) * | 2005-06-30 | 2007-01-18 | Neomax Co Ltd | Laminated inductor, method of manufacturing thereof and green sheet |
CN103474736A (en) * | 2013-09-02 | 2013-12-25 | 武汉芯泰科技有限公司 | Power synthesizer |
-
1989
- 1989-06-19 JP JP15601489A patent/JPH0321003A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09232147A (en) * | 1996-02-22 | 1997-09-05 | Nec Corp | Transmission line transformer |
DE19810617B4 (en) * | 1997-03-12 | 2006-04-27 | Lg Electronics Inc. | Hybrid transformer for HF mixers in printed circuit |
JP2007012920A (en) * | 2005-06-30 | 2007-01-18 | Neomax Co Ltd | Laminated inductor, method of manufacturing thereof and green sheet |
CN103474736A (en) * | 2013-09-02 | 2013-12-25 | 武汉芯泰科技有限公司 | Power synthesizer |
CN103474736B (en) * | 2013-09-02 | 2016-04-20 | 武汉芯泰科技有限公司 | A kind of power combiner |
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