JPH0787328B2 - Balun coil - Google Patents
Balun coilInfo
- Publication number
- JPH0787328B2 JPH0787328B2 JP60135353A JP13535385A JPH0787328B2 JP H0787328 B2 JPH0787328 B2 JP H0787328B2 JP 60135353 A JP60135353 A JP 60135353A JP 13535385 A JP13535385 A JP 13535385A JP H0787328 B2 JPH0787328 B2 JP H0787328B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- coils
- transmission line
- ferrite substrate
- balun
- 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
- 239000000758 substrate Substances 0.000 claims description 19
- 229910000859 α-Fe Inorganic materials 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 239000003973 paint Substances 0.000 claims description 4
- 238000007639 printing Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Coils Or Transformers For Communication (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はアンテナ等に用いられるバランコイルに関す
る。TECHNICAL FIELD The present invention relates to a balun coil used for an antenna or the like.
従来の技術 従来のバランコイルは、第３図のように構成されている
〔トランジスタ技術、1984年第７号、第444頁〈図14−2
0〉「伝送線路トランスの応用」CQ出版〈株〉発行〕。
つまり、コイル22,23,24,25の４つのコイルをリングコ
ア26に巻回し、コイル22の一端を端子T1、コイル22の他
端とコイル25の一端とを接続して端子T2、コイル25の他
端とコイル23の一端とを接続して端子T3、コイル23の他
端とコイル24の一端とを接続して端子T4、コイル24の他
端を端子T5としている。Conventional Technology A conventional balun coil is constructed as shown in FIG. 3 [Transistor technology, No. 7, 1984, page 444 (FIG. 14-2.
0>"Application of transmission line transformer" CQ Publishing Co., Ltd.].
In other words, turning 26 wound ring core four coils of coil 22, 23, 24, 25, the terminal T 1 of the end of the coil 22, the terminal T 2 connected to one end of the other end and the coil 25 of the coil 22, the coil The other end of 25 and one end of the coil 23 are connected to each other, the terminal T 3 is connected, and the other end of the coil 23 and one end of the coil 24 are connected to each other, so that the terminal T 4 and the other end of the coil 24 are connected to the terminal T 5 .
発明が解決しようとする問題点 このような従来の構成では、コアがリングコア26のよう
に形状が閉じているため、コイル22〜25の巻回作業が非
常に面倒であり、そのため生産コストが上がり、価格が
高くなる。しかも、バランコイルの接続、固定作業も面
倒であって使い勝手が悪く、端子T1〜T5を他の回路部分
に接続するので空中配線のようになって、特性が不安定
になる。Problems to be Solved by the Invention In such a conventional configuration, since the core has a closed shape like the ring core 26, the winding work of the coils 22 to 25 is very troublesome, which increases the production cost. , The price will be higher. Moreover, the connection and fixing work of the balun coil is troublesome and inconvenient, and since the terminals T 1 to T 5 are connected to other circuit parts, it becomes like an aerial wiring and the characteristics become unstable.
本発明は性能の安定化を図ると共に大量生産に適したバ
ランコイルを提供することを目的とする。It is an object of the present invention to provide a balun coil suitable for mass production while stabilizing its performance.
問題点を解決するための手段 本発明のバランコイルは、フェライト基板の両面に、導
電性塗料を印刷して焼成することにより、それぞれ複数
のコイルを形成して、フェライト基板の一方の面に設け
られた前記コイルと、他方の面に基板を挟んで同一方向
に設けられた前記コイルとを磁気結合させて、１組の伝
送線路トランスを構成すると共に、これら伝送線路トラ
ンスをそれぞれのコイルが互いに平行になるように少な
くとも２組形成し、隣接する前記伝送線路トランスが磁
気結合しないように、伝送線路トランスの間のフェライ
ト基板に、結合遮蔽孔を前記コイルの全長にわたって結
合遮蔽孔を穿設したことを特徴とする。Means for Solving the Problems The balun coil of the present invention is provided on one surface of a ferrite substrate by forming a plurality of coils by printing conductive paint on both surfaces of the ferrite substrate and baking the same. The coil and the coil provided on the other surface in the same direction with the substrate sandwiched therebetween are magnetically coupled to form a set of transmission line transformers, and these transmission line transformers are connected to each other. At least two sets are formed so as to be parallel to each other, and coupling shield holes are formed in the ferrite substrate between the transmission line transformers over the entire length of the coil so that adjacent transmission line transformers are not magnetically coupled. It is characterized by
作用 この構成によると、フェライト基板への印刷、焼成作業
などにより、必要なコイルを形成出来、従来のような煩
わしい巻回作業を必要としないため、大量生産に適す
る。また、各コイルの線長を等しくすることが出来、コ
イル間の結合のバラッキ、特性インピーダンスのバラッ
キを非常に小さなものとすることが出来る。更に、固定
作業も容易で、使い勝手も良好である。Operation According to this configuration, the necessary coil can be formed by printing on the ferrite substrate, firing work, etc., and it is not necessary to perform a troublesome winding work as in the conventional case, and thus is suitable for mass production. Further, the line lengths of the coils can be made equal, and the variation in the coupling between the coils and the variation in the characteristic impedance can be made extremely small. Further, the fixing work is easy and the usability is good.
実施例 以下、本発明の一実施例を第１図と第２図に基づいて説
明する。Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図は本発明のバランコイルの平面図で、フェライト
基板にコイルが形成されている。つまり、フェライト基
板１にコイル配線用の貫通孔２〜64,5,6および結合遮蔽
孔19を穿設し、この貫通孔2,3にはスルーホールメッキ
を施こし、フェライト基板１の一方の面（S1）に導電性
塗料を印刷し、焼成することによって、コイル7,8と接
続線９を形成し、フェライト基板１の他方の面（S2）に
導電性塗料を印刷し、焼成することによってコイル10,1
1と接続線12,13および外部接続端子14,15,16,17,18を形
成し、前記のスルーホールメッキされた貫通孔２を介し
てコイル７の巻始めと外部接続端子14とを接続し、スル
ーホールメッキされた貫通孔６を介してコイル７の巻終
りと外部続端子17とを接続し、スルーホールされた貫通
孔５と接続線９を介してコイル７の巻終りとコイル11の
巻終りとを接続し、コイル11の巻始めとコイル10の巻始
めとを接続線13を介して外部接続端子15に接続し、接続
線12とスルーホールメッキされた貫通孔４を介してコイ
ル10の巻終りとコイル８の巻終りとを外部接続端子18に
接続し、スルーホールメッキされた貫通孔３を介してコ
イル８の巻始めを外部接続端子16に接続している。従っ
て、コイル７と10とがフェライト基板１を介して磁気結
合し、コイル８と11とがフェライト基板１を介して磁気
結合している。また、コイル７と10とで構成されるトラ
ンス部20とコイル８と11で構成されるトランス部21とは
結合遮蔽孔19で磁気結合が遮蔽したため、特に高周波域
での特性が向上した。FIG. 1 is a plan view of a balun coil of the present invention, in which a coil is formed on a ferrite substrate. That is, through holes 2 to 64,5,6 for coil wiring and a coupling shield hole 19 are bored in the ferrite substrate 1, and the through holes 2 and 3 are plated with through holes so that one of the ferrite substrates 1 The conductive paint is printed on the surface (S 1 ) and fired to form the coils 7 and 8 and the connecting wires 9, and the conductive paint is printed on the other surface (S 2 ) of the ferrite substrate 1 and fired. By coil 10,1
1 and the connecting wires 12 and 13 and the external connecting terminals 14, 15, 16, 17, and 18 are formed, and the winding start of the coil 7 and the external connecting terminal 14 are connected through the through hole 2 plated with the through hole. Then, the winding end of the coil 7 and the external connecting terminal 17 are connected via the through hole 6 plated with a through hole, and the winding end of the coil 7 and the coil 11 are connected via the through hole 5 and the connecting wire 9 which are through holes. The winding start of the coil 11 and the winding start of the coil 10 are connected to the external connection terminal 15 via the connection wire 13, and the connection wire 12 and the through hole 4 plated with a through hole. The winding end of the coil 10 and the winding end of the coil 8 are connected to the external connection terminal 18, and the winding start of the coil 8 is connected to the external connection terminal 16 through the through hole 3 plated with through holes. Therefore, the coils 7 and 10 are magnetically coupled via the ferrite substrate 1, and the coils 8 and 11 are magnetically coupled via the ferrite substrate 1. Further, the magnetic coupling between the transformer portion 20 formed of the coils 7 and 10 and the transformer portion 21 formed of the coils 8 and 11 is shielded by the coupling shield hole 19, so that the characteristics are improved particularly in the high frequency range.
第２図はこのようにして構成されたバランコイルの等価
回路を示す。FIG. 2 shows an equivalent circuit of the balun coil thus constructed.
上記実施例ではフェライト基板１トランス20と21の２組
の伝送線路トランスを構成したが、これは２組に限定さ
れるものではなく、少なくとも２組であれば同様に実施
できる。In the above embodiment, two sets of transmission line transformers of the ferrite substrate 1 transformers 20 and 21 were constructed, but this is not limited to two sets, and at least two sets can be similarly implemented.
発明の効果 以上説明のように本発明のバランコイルは、フェライト
基板にコイルおよび接続線を形成することによって構成
されているため、コイルの結合度および特性インピーダ
ンスのバラッキを小さくし、配線リード線長のバラッキ
を小さく出来るため、大量生産に適し、固定作業も容易
で使い勝手の良好なものである。また、単位当たりのイ
ンダクタンスが大きく得られた小型化でき、Ｑ特性が高
くバランコイルとしての性能を高くできるフェライト基
板を使用し、伝送線路トランス間のフェライト基板にコ
イルの全長にわたって結合遮蔽孔を形成したので、各伝
送線路トランス間の磁気結合を効果的に防止して、高周
波特性が優れたバランコイルを得ることができる。EFFECTS OF THE INVENTION As described above, the balun coil of the present invention is formed by forming the coil and the connecting wire on the ferrite substrate, so that the coupling degree of the coil and the characteristic impedance variation are reduced, and the wiring lead wire length is reduced. It is suitable for mass production because it can be made smaller, and is easy to fix and easy to use. In addition, a ferrite substrate with a large inductance per unit, which can be miniaturized, and has high Q characteristics and high performance as a balun coil, is used. Therefore, it is possible to effectively prevent magnetic coupling between the transmission line transformers and obtain a balun coil having excellent high frequency characteristics.
第１図は本発明のバランコイルの一実施例の平面図、第
２図は同実施例の等価回路図、第３図は従来のバランコ
イルの平面図である。 １……フェライト基板、2,3,4,5,6……貫通孔、7,8,10,
11……コイル、9,12,13……接続線、14,15,16,17,18…
…外部接続端子、19……結合遮蔽孔、（S1）……フェラ
イト基板の一方の面、（S2）……フェライト基板の他方
の面FIG. 1 is a plan view of an embodiment of the balun coil of the present invention, FIG. 2 is an equivalent circuit diagram of the same embodiment, and FIG. 3 is a plan view of a conventional balun coil. 1 ... Ferrite substrate, 2,3,4,5,6 ... through hole, 7,8,10,
11 …… Coil, 9,12,13 …… Connecting wire, 14,15,16,17,18…
… External connection terminals, 19 …… Coupling shield hole, (S 1 ) …… One side of ferrite board, (S 2 ) …… The other side of ferrite board
Claims (1)
刷して焼成することにより、それぞれ複数のコイルを形
成して、フェライト基板の一方の面に設けられた前記コ
イルと、他方の面に基板を挟んで同一方向に設けられた
前記コイルとを磁気結合させて、１組の伝送線路トラン
スを構成すると共に、これら伝送線路トランスをそれぞ
れのコイルが互いに平行になるように少なくとも２組形
成し、隣接する前記伝送線路トランスが磁気結合しない
ように、伝送線路トランスの間のフェライト基板に、結
合遮蔽孔を前記コイルの全長にわたって穿設したバラン
コイル。1. A plurality of coils are formed by printing a conductive paint on both surfaces of a ferrite substrate and baking the same, and the coils are provided on one surface of the ferrite substrate and the other surface. A pair of transmission line transformers are formed by magnetically coupling the coils provided in the same direction with the substrate sandwiched between them, and at least two sets of these transmission line transformers are formed so that the respective coils are parallel to each other. A balun coil in which a coupling shield hole is formed over the entire length of the coil in a ferrite substrate between the transmission line transformers so that the adjacent transmission line transformers are not magnetically coupled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60135353A JPH0787328B2 (en) | 1985-06-20 | 1985-06-20 | Balun coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60135353A JPH0787328B2 (en) | 1985-06-20 | 1985-06-20 | Balun coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61293011A JPS61293011A (en) | 1986-12-23 |
| JPH0787328B2 true JPH0787328B2 (en) | 1995-09-20 |
Family
ID=15149768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60135353A Expired - Fee Related JPH0787328B2 (en) | 1985-06-20 | 1985-06-20 | Balun coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787328B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5073544A (en) * | 1973-10-30 | 1975-06-17 | ||
| JPS5476922U (en) * | 1977-11-11 | 1979-05-31 |
-
1985
- 1985-06-20 JP JP60135353A patent/JPH0787328B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61293011A (en) | 1986-12-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |