JP4736808B2 - Multilayer balun transformer and electronic equipment using the same - Google Patents

Multilayer balun transformer and electronic equipment using the same Download PDF

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JP4736808B2
JP4736808B2 JP2006000343A JP2006000343A JP4736808B2 JP 4736808 B2 JP4736808 B2 JP 4736808B2 JP 2006000343 A JP2006000343 A JP 2006000343A JP 2006000343 A JP2006000343 A JP 2006000343A JP 4736808 B2 JP4736808 B2 JP 4736808B2
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coil conductor
coil
external electrode
balun transformer
conductor
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JP2007184334A (en
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豊 田口
祥吾 中山
兼司 植野
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Panasonic Corp
Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Description

本発明は、デジタル機器やＡＶ機器、情報通信端末等の各種電子機器の平衡−不平衡信号変換等に使用される積層型バルントランスおよびこれを用いた電子機器に関するものである。   The present invention relates to a stacked balun transformer used for balanced-unbalanced signal conversion of various electronic devices such as digital devices, AV devices, and information communication terminals, and an electronic device using the same.

従来のこの種の積層型バルントランスは、図５、図６に示すように、第１〜第８の絶縁体層１ａ〜１ｈと、第１の絶縁体層１ａの上面に設けられた引出電極２と、第２〜第５の絶縁体層１ｂ〜１ｅの上面にそれぞれ設けられた第１〜第４のコイル導体３〜６と、第６〜第８の絶縁体層１ｆ〜１ｈの上面にそれぞれ設けられた第１〜第３のグランド電極７ａ〜７ｃとを備えることにより、積層型バルントランス本体８を形成させ、そして前記第１のコイル導体３と第２のコイル導体４とを第２の絶縁体層１ｂを介して対向させ、かつ第３のコイル導体５と第４のコイル導体６とを第４の絶縁体層１ｄを介して対向させていた。   As shown in FIGS. 5 and 6, this type of conventional laminated balun transformer includes first to eighth insulator layers 1a to 1h and an extraction electrode provided on the upper surface of the first insulator layer 1a. 2 and the first to fourth coil conductors 3 to 6 provided on the upper surfaces of the second to fifth insulator layers 1b to 1e, and the upper surfaces of the sixth to eighth insulator layers 1f to 1h, respectively. By providing the first to third ground electrodes 7a to 7c provided respectively, the laminated balun transformer body 8 is formed, and the first coil conductor 3 and the second coil conductor 4 are connected to the second The third coil conductor 5 and the fourth coil conductor 6 are opposed to each other via the fourth insulator layer 1d.

また、積層型バルントランス本体８の奥側には第１〜第４の外部電極９ａ〜９ｄが備えられ、かつ手前側には第５〜第８の外部電極９ｅ〜９ｈが備えられ、そして前記引出電極２の端部２ａは積層型バルントランス本体８の奥側の中央部右よりの第３の外部電極９ｃに接続し、第１のコイル導体３の端部３ａは積層型バルントランス本体８の手前側の右側の第８の外部電極９ｈに接続し、第２のコイル導体４の端部４ａは積層型バルントランス本体８の手前側の中央部右よりの第７の外部電極９ｇに接続し、第３のコイル導体５の端部５ａは積層型バルントランス本体８の手前側の中央部左よりの第６の外部電極９ｆに接続し、第４のコイル導体６の端部６ａは積層型バルントランス本体８の手前側の右側の第８の外部電極９ｈに接続していた。なお、第１のコイル導体３と第４のコイル導体６とは第８の外部電極９ｈを介して接続されている。   Also, the back side of the multilayer balun transformer body 8 is provided with first to fourth external electrodes 9a to 9d, and the front side is provided with fifth to eighth external electrodes 9e to 9h, and The end 2a of the extraction electrode 2 is connected to a third external electrode 9c from the center right on the back side of the multilayer balun transformer main body 8, and the end 3a of the first coil conductor 3 is connected to the multilayer balun transformer main body 8. The end portion 4a of the second coil conductor 4 is connected to the seventh external electrode 9g from the center right side of the front side of the multilayer balun transformer body 8. The end 5a of the third coil conductor 5 is connected to the sixth external electrode 9f from the center left side of the front side of the multilayer balun transformer body 8, and the end 6a of the fourth coil conductor 6 is laminated. Connected to the right outer right electrode 8h of the balun transformer body 8 . The first coil conductor 3 and the fourth coil conductor 6 are connected via an eighth external electrode 9h.

そして、この積層型バルントランスは、第３の外部電極９ｃに不平衡信号が流入したとき、第１のコイル導体３と第２のコイル導体４とが磁気結合し、かつ第３のコイル導体５と第４のコイル導体６とが磁気結合することによって、不平衡信号を平衡信号に変換していた。また、この平衡信号は第６の外部電極９ｆと、第７の外部電極９ｇから流出していた。   In this multilayer balun transformer, when an unbalanced signal flows into the third external electrode 9c, the first coil conductor 3 and the second coil conductor 4 are magnetically coupled, and the third coil conductor 5 And the fourth coil conductor 6 are magnetically coupled to convert an unbalanced signal into a balanced signal. Further, this balanced signal flowed out from the sixth external electrode 9f and the seventh external electrode 9g.

なお、この出願の発明に関する先行技術文献情報としては、例えば、特許文献１が知られている。
特開２０００−５８３２８号公報 As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
JP 2000-58328 A

上記した従来の積層型バルントランスにおいては、実装時に方向性を確認する必要があるという課題を有していた。   The above-described conventional laminated balun transformer has a problem that it is necessary to confirm directionality during mounting.

すなわち、８個ある外部電極９ａ〜９ｈのうち、不平衡信号や平衡信号が流入、流出する外部電極は３個しかなく、しかもそのうち積層型バルントランス本体８の奥側にある外部電極は１個だけであるため、１８０°回転した状態となった場合や、上下が逆になった場合に実装されると、積層型バルントランスとして動作できないものであり、したがって、実装時に方向性を確認する必要があるという課題を有していた。   That is, among the eight external electrodes 9a to 9h, there are only three external electrodes through which unbalanced signals and balanced signals flow in and out, and one of the external electrodes on the back side of the laminated balun transformer body 8 is one. Therefore, when mounted in a 180 ° rotated state or upside down, it cannot operate as a laminated balun transformer, so it is necessary to check the directionality when mounting. Had the problem of being.

本発明は上記従来の課題を解決するもので、実装時に方向性を確認する必要がない積層型バルントランスおよびこれを用いた電子機器を提供することを目的とするものである。   SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a laminated balun transformer and an electronic device using the same without having to confirm directionality during mounting.

上記目的を達成するために本発明は、以下の構成を有するものである。   In order to achieve the above object, the present invention has the following configuration.

本発明の請求項１に記載の発明は、上下方向に積層された複数の絶縁体層と、前記複数の絶縁体層に設けられた第１〜第４のコイル導体と、前記複数の絶縁体層および前記第１〜第４のコイル導体からなる積層体とを備え、前記第１のコイル導体の少なくとも一部と前記第３のコイル導体の少なくとも一部を前記複数の絶縁体層のうち一部を介して対向させ、かつ前記第２のコイル導体の少なくとも一部と前記第４のコイル導体の少なくとも一部を前記複数の絶縁体層のうち一部を介して対向させ、さらに前記積層体の一端部から他端部に向かって順に、前記積層体の一側面に前記第１のコイル導体の一端部と接続された第１の外部電極、前記第２のコイル導体の一端部と接続された第２の外部電極、前記第３のコイル導体の一端部と接続された第３の外部電極、前記第４のコイル導体の一端部と接続された第４の外部電極をそれぞれ形成し、かつ前記積層体の他の側面に前記第１のコイル導体の他端部と接続された第５の外部電極、前記第２のコイル導体の他端部と接続された第６の外部電極、前記第３のコイル導体の他端部と接続された第７の外部電極、前記第４のコイル導体の他端部と接続された第８の外部電極をそれぞれ形成し、さらに、前記積層体の一側面、他の側面のいずれか一方に形成された外部電極のうちいずれか１つを入力端子に接続し、前記入力端子と接続された外部電極が形成された側面と異なる側面に形成された外部電極において互いに隣り合う２つの外部電極２組をそれぞれ第１の出力端子、第２の出力端子に接続したもので、この構成によれば、積層体の一側面に露出した第１〜第４のコイル導体の一端部に第１〜第４の外部電極を接続するとともに、積層体の他の側面に露出した第１〜第４のコイル導体の他端部に第５〜第８の外部電極を接続しているため、すべての第１〜第８の外部電極のうち、半分を積層体の一側面に、もう半分を積層体の他の側面に形成することができ、さらに、すべての外部電極に不平衡信号や平衡信号を流入、流出させることができるため、実装時に方向性を確認する必要がない積層型バルントランスを提供することができるという作用効果が得られるものである。 The invention according to claim 1 of the present invention includes a plurality of insulator layers stacked in the vertical direction, first to fourth coil conductors provided on the plurality of insulator layers, and the plurality of insulators. And at least a part of the first coil conductor and at least a part of the third coil conductor are one of the plurality of insulator layers. And at least a part of the second coil conductor and at least a part of the fourth coil conductor are opposed to each other through a part of the plurality of insulator layers, and further the laminated body The first external electrode connected to one end portion of the first coil conductor and one end portion of the second coil conductor are connected to one side surface of the laminate in order from one end portion to the other end portion. second external electrodes, is connected to one end of the third coil conductor Third external electrode, and the fourth is connected to one end of the coil conductor was a fourth external electrode formed respectively, and the other end of the other side surface of the stacked body first coil conductor A fifth external electrode connected; a sixth external electrode connected to the other end of the second coil conductor; a seventh external electrode connected to the other end of the third coil conductor; An eighth external electrode connected to the other end of the fourth coil conductor is formed, and any one of the external electrodes formed on one side or the other side of the laminate. Two external electrodes adjacent to each other in the external electrode formed on the side surface different from the side surface on which the external electrode connected to the input terminal is formed are connected to the input terminal, respectively. which was connected to the second output terminal, according to this configuration, lamination The first to thereby connect the fourth external electrode, the other first to fourth coil conductors exposed on the other side of the stack at one end of the first to fourth coil conductors exposed on one side of the Since the fifth to eighth external electrodes are connected to the end, among all the first to eighth external electrodes , half is on one side of the laminate and the other half is on the other side of the laminate. Furthermore, since an unbalanced signal and a balanced signal can be flowed in and out of all external electrodes, it is possible to provide a stacked balun transformer that does not require confirmation of directionality during mounting. A working effect can be obtained.

本発明の請求項２に記載の発明は、特に、第１のコイル導体および第３のコイル導体を、第２のコイル導体および第４のコイル導体の上方または下方に設けたもので、この構成によれば、第１のコイル導体および第３のコイル導体と、第２のコイル導体および第４のコイル導体とを同一面に設けずに済むため、実装面積を小さくすることができるという作用効果が得られるものである。   In the invention according to claim 2 of the present invention, in particular, the first coil conductor and the third coil conductor are provided above or below the second coil conductor and the fourth coil conductor. Since the first coil conductor and the third coil conductor, and the second coil conductor and the fourth coil conductor do not have to be provided on the same surface, the effect of reducing the mounting area can be achieved. Is obtained.

本発明の請求項３に記載の発明は、特に、第１〜第４のコイル導体のそれぞれの長さを略同一にしたもので、この構成によれば、各コイル導体のインダクタンスや抵抗値を同一にすることができるため、実装時の方向を変えても同一の出力信号が得られるという作用効果が得られるものである。   In the invention according to claim 3 of the present invention, in particular, the lengths of the first to fourth coil conductors are made substantially the same. According to this configuration, the inductance and the resistance value of each coil conductor are reduced. Since they can be made the same, the same output signal can be obtained even if the direction during mounting is changed.

本発明の請求項４に記載の発明は、請求項１記載の積層型バルントランスの入力端子に不平衡信号ラインを接続し、かつ第１、第２の出力端子にそれぞれ平衡信号ラインを接続したもので、この構成によれば、実装時に方向性を確認する必要がない積層バルントランスを用いているため、実装が容易な電子機器を得ることができるという作用効果が得られるものである。 According to a fourth aspect of the present invention , an unbalanced signal line is connected to the input terminal of the stacked balun transformer according to the first aspect, and a balanced signal line is connected to each of the first and second output terminals . Therefore, according to this configuration, since a laminated balun transformer that does not require confirmation of directionality at the time of mounting is used, an operational effect that an electronic device that can be easily mounted can be obtained.

以上のように本発明の積層型バルントランスは、前記第１のコイル導体の少なくとも一部と前記第３のコイル導体の少なくとも一部を前記複数の絶縁体層のうち一部を介して対向させ、かつ前記第２のコイル導体の少なくとも一部と前記第４のコイル導体の少なくとも一部を前記複数の絶縁体層のうち一部を介して対向させ、さらに前記積層体の一端部から他端部に向かって順に、前記積層体の一側面に前記第１のコイル導体の一端部と接続された第１の外部電極、前記第２のコイル導体の一端部と接続された第２の外部電極、前記第３のコイル導体の一端部と接続された第３の外部電極、前記第４のコイル導体の一端部と接続された第４の外部電極をそれぞれ形成し、かつ前記積層体の他の側面に前記第１のコイル導体の他端部と接続された第５の外部電極、前記第２のコイル導体の他端部と接続された第６の外部電極、前記第３のコイル導体の他端部と接続された第７の外部電極、前記第４のコイル導体の他端部と接続された第８の外部電極をそれぞれ形成し、さらに、前記積層体の一側面、他の側面のいずれか一方に形成された外部電極のうちいずれか１つを入力端子に接続し、前記入力端子と接続された外部電極が形成された側面と異なる側面に形成された外部電極において互いに隣り合う２つの外部電極２組をそれぞれ第１の出力端子、第２の出力端子に接続しているため、積層体の一側面に露出した第１〜第４のコイル導体の一端部に第１〜第４の外部電極を接続するとともに、積層体の他の側面に露出した第１〜第４のコイル導体の他端部に第５〜第８の外部電極を接続することによって、すべての第１〜第８の外部電極のうち、半分を積層体の一側面に、もう半分を積層体の他の側面に形成することができ、さらに、すべての外部電極に不平衡信号や平衡信号を流入、流出させることができるため、実装時に方向性を確認する必要がない積層型バルントランスを提供することができるという優れた効果を奏するものである。 As described above, in the multilayer balun transformer of the present invention, at least a part of the first coil conductor and at least a part of the third coil conductor are opposed to each other through a part of the plurality of insulator layers. And at least a part of the second coil conductor and at least a part of the fourth coil conductor are opposed to each other through a part of the plurality of insulator layers, and further from one end to the other end of the multilayer body A first external electrode connected to one end of the first coil conductor on one side surface of the laminate, and a second external electrode connected to one end of the second coil conductor, in order toward the portion Forming a third external electrode connected to one end of the third coil conductor, a fourth external electrode connected to one end of the fourth coil conductor , and the other of the laminate connected to the other end portion of the on the side surface the first coil conductor Fifth external electrode, the second sixth external electrode connected to the other end of the coil conductor, said third seventh external electrode connected to the other end of the coil conductor, of the fourth An eighth external electrode connected to the other end of the coil conductor is formed, and one of the external electrodes formed on one side or the other side of the laminate is input. 2 sets of two external electrodes adjacent to each other in the external electrode formed on the side surface different from the side surface on which the external electrode connected to the input terminal is formed are connected to the terminal as the first output terminal and the second output, respectively. Since it is connected to the terminal, the first to fourth external electrodes are connected to one end portions of the first to fourth coil conductors exposed on one side surface of the multilayer body and exposed to the other side surface of the multilayer body. fifth to external electrodes of the eighth to the other end portion of the first to fourth coil conductor By connection among all the first to eighth external electrode, half on one side of the laminate, it is possible to form the other half on the other side of the laminate, further, to all external electrodes Since an unbalanced signal and a balanced signal can be flowed in and out, it is possible to provide an excellent effect that it is possible to provide a laminated balun transformer that does not require confirmation of directionality during mounting.

図１は本発明の一実施の形態における積層型バルントランスの分解斜視図、図２は同積層型バルントランスの斜視図である。   FIG. 1 is an exploded perspective view of a laminated balun transformer according to an embodiment of the present invention, and FIG. 2 is a perspective view of the laminated balun transformer.

本発明の一実施の形態における積層型バルントランスは、図１、図２に示すように、上下方向に積層された第１〜第４の絶縁体層１１ａ〜１１ｄと、前記第１〜第４の絶縁体層１１ａ〜１１ｄに設けられた第１〜第４のコイル導体１２〜１５と、前記第１〜第４の絶縁体層１１ａ〜１１ｄおよび第１〜第４のコイル導体１２〜１５からなる積層体１６とを備え、前記第１のコイル導体１２の少なくとも一部と前記第３のコイル導体１４の少なくとも一部を前記第２の絶縁体層１１ｂを介して対向させ、かつ前記第２のコイル導体１３の少なくとも一部と前記第４のコイル導体１５の少なくとも一部を前記第２の絶縁体層１１ｂを介して対向させている。   As shown in FIGS. 1 and 2, the multilayer balun transformer in one embodiment of the present invention includes first to fourth insulator layers 11 a to 11 d that are stacked in the vertical direction, and the first to fourth layers. First to fourth coil conductors 12 to 15 provided on the insulator layers 11a to 11d, and the first to fourth insulator layers 11a to 11d and the first to fourth coil conductors 12 to 15. And at least a part of the first coil conductor 12 and at least a part of the third coil conductor 14 are opposed to each other via the second insulator layer 11b, and the second coil layer 16 is provided. At least a part of the coil conductor 13 and at least a part of the fourth coil conductor 15 are opposed to each other through the second insulator layer 11b.

さらに、前記積層体１６の一端部から他端部に向かって順に、前記積層体１６の一側面に前記第１のコイル導体１２の一端部１２ａ、前記第２のコイル導体１３の一端部１３ａ、前記第３のコイル導体１４の一端部１４ａ、前記第４のコイル導体１５の一端部１５ａを露出させ、かつ前記積層体１６の他の側面に前記第１のコイル導体１２の他端部１２ｂ、前記第２のコイル導体１３の他端部１３ｂ、前記第３のコイル導体１４の他端部１４ｂ、前記第４のコイル導体１５の他端部１５ｂを露出させている。   Furthermore, one end portion 12a of the first coil conductor 12 and one end portion 13a of the second coil conductor 13 on one side surface of the multilayer body 16 in order from one end portion to the other end portion of the multilayer body 16. One end portion 14a of the third coil conductor 14 and one end portion 15a of the fourth coil conductor 15 are exposed, and the other end portion 12b of the first coil conductor 12 is formed on the other side surface of the multilayer body 16; The other end 13 b of the second coil conductor 13, the other end 14 b of the third coil conductor 14, and the other end 15 b of the fourth coil conductor 15 are exposed.

上記構成において、前記第１〜第４の絶縁体層１１ａ〜１１ｄは、上下方向に積層され、上から第１の絶縁体層１１ａ、第２の絶縁体層１１ｂ、第３の絶縁体層１１ｃ、第４の絶縁体層１１ｄの順に形成されている。また、この第１〜第４の絶縁体層１１ａ〜１１ｄはＦｅ2Ｏ3をベースとしたフェライトなどの磁性材料または誘電材料により構成されている。 The said structure WHEREIN: The said 1st-4th insulator layers 11a-11d are laminated | stacked on an up-down direction, and are the 1st insulator layer 11a, the 2nd insulator layer 11b, and the 3rd insulator layer 11c from the top. The fourth insulator layer 11d is formed in this order. The first to fourth insulator layers 11a to 11d are made of a magnetic material such as ferrite based on Fe 2 O 3 or a dielectric material.

前記第１のコイル導体１２は、第２の絶縁体層１１ｂの上面に渦巻き状に銀などの導電材料をめっきすることにより形成された第１のコイル１７と、第１の絶縁体層１１ａの上面に銀などの導電材料をめっきすることにより形成された第１の引出電極１８とにより構成されている。そして、前記第１のコイル１７と第１の引出電極１８とは、第１の絶縁体層１１ａに形成されたバイア電極１９によって接続されている。また、第１のコイル導体１２の一端部１２ａ、すなわち第１の引出電極１８の端部は第１の絶縁体層１１ａの一側面に露出し、かつ第１のコイル導体１２の他端部１２ｂ、すなわち第１のコイル１７の端部は第２の絶縁体層１１ｂの他の側面に露出している。   The first coil conductor 12 includes a first coil 17 formed by plating a conductive material such as silver spirally on the upper surface of the second insulator layer 11b, and the first insulator layer 11a. The upper surface is composed of a first extraction electrode 18 formed by plating a conductive material such as silver on the upper surface. The first coil 17 and the first extraction electrode 18 are connected by a via electrode 19 formed in the first insulator layer 11a. One end portion 12a of the first coil conductor 12, that is, the end portion of the first extraction electrode 18 is exposed on one side surface of the first insulator layer 11a, and the other end portion 12b of the first coil conductor 12. That is, the end portion of the first coil 17 is exposed on the other side surface of the second insulator layer 11b.

前記第２のコイル導体１３は、第２の絶縁体層１１ｂの上面に渦巻き状に銀などの導電材料をめっきすることにより形成された第２のコイル２０と、第１の絶縁体層１１ａの上面に銀などの導電材料をめっきすることにより形成された第２の引出電極２１とにより構成されている。そして、前記第２のコイル２０と第２の引出電極２１とは、第１の絶縁体層１１ａに形成されたバイア電極２２によって接続されている。また、第２のコイル導体１３の一端部１３ａ、すなわち第２の引出電極２１の端部は第１の絶縁体層１１ａの一側面に露出し、かつ第２のコイル導体１３の他端部１３ｂ、すなわち第２のコイル２０の端部は第２の絶縁体層１１ｂの他の側面に露出している。   The second coil conductor 13 includes a second coil 20 formed by plating a conductive material such as silver spirally on the upper surface of the second insulator layer 11b, and a first insulator layer 11a. It is comprised by the 2nd extraction electrode 21 formed by plating electrically conductive materials, such as silver, on the upper surface. The second coil 20 and the second extraction electrode 21 are connected by a via electrode 22 formed in the first insulator layer 11a. The one end portion 13a of the second coil conductor 13, that is, the end portion of the second extraction electrode 21, is exposed on one side surface of the first insulator layer 11a, and the other end portion 13b of the second coil conductor 13. That is, the end of the second coil 20 is exposed on the other side surface of the second insulator layer 11b.

前記第３のコイル導体１４は、第３の絶縁体層１１ｃの上面に渦巻き状に銀などの導電材料をめっきすることにより形成された第３のコイル２３と、第４の絶縁体層１１ｄの上面に銀などの導電材料をめっきすることにより形成された第３の引出電極２４とにより構成されている。そして、前記第３のコイル２３と第３の引出電極２４とは、第３の絶縁体層１１ｃに形成されたバイア電極２５によって接続されている。また、第３のコイル導体１４の一端部１４ａ、すなわち第３の引出電極２４の端部は第４の絶縁体層１１ｄの一側面に露出し、第３のコイル導体１４の他端部１４ｂ、すなわち第３のコイル２３の端部は第３の絶縁体層１１ｃの他の側面に露出している。   The third coil conductor 14 includes a third coil 23 formed by plating a conductive material such as silver spirally on the upper surface of the third insulator layer 11c, and a fourth insulator layer 11d. The upper surface is constituted by a third extraction electrode 24 formed by plating a conductive material such as silver on the upper surface. The third coil 23 and the third extraction electrode 24 are connected by a via electrode 25 formed in the third insulator layer 11c. One end portion 14a of the third coil conductor 14, that is, the end portion of the third extraction electrode 24 is exposed on one side surface of the fourth insulator layer 11d, and the other end portion 14b of the third coil conductor 14 is provided. That is, the end of the third coil 23 is exposed on the other side surface of the third insulator layer 11c.

そして、前記第１のコイル１７と第３のコイル２３とは対向しているため、それぞれに同方向の信号が入力した場合、第１のコイル導体１２と第３のコイル導体１４とは互いに磁気結合するものである。   Since the first coil 17 and the third coil 23 face each other, when a signal in the same direction is input to each, the first coil conductor 12 and the third coil conductor 14 are magnetically connected to each other. It is to be combined.

前記第４のコイル導体１５は、第３の絶縁体層１１ｃの上面に渦巻き状に銀などの導電材料をめっきすることにより形成された第４のコイル２６と、第４の絶縁体層１１ｄの上面に銀などの導電材料をめっきすることにより形成された第４の引出電極２７とにより構成されている。そして、前記第４のコイル２６と第４の引出電極２７とは、第３の絶縁体層１１ｃに形成されたバイア電極２８によって接続されている。また、第４のコイル導体１５の一端部１５ａ、すなわち第４の引出電極２７の端部は第４の絶縁体層１１ｄの一側面に露出し、第４のコイル導体１５の他端部１５ｂ、すなわち第４のコイル２６の端部は第３の絶縁体層１１ｃの他の側面に露出している。   The fourth coil conductor 15 includes a fourth coil 26 formed by plating a conductive material such as silver spirally on the upper surface of the third insulator layer 11c, and a fourth insulator layer 11d. A fourth extraction electrode 27 is formed by plating a conductive material such as silver on the upper surface. The fourth coil 26 and the fourth extraction electrode 27 are connected by a via electrode 28 formed in the third insulator layer 11c. Further, one end portion 15a of the fourth coil conductor 15, that is, the end portion of the fourth lead electrode 27 is exposed on one side surface of the fourth insulator layer 11d, and the other end portion 15b of the fourth coil conductor 15 is provided. That is, the end of the fourth coil 26 is exposed on the other side surface of the third insulator layer 11c.

そして、前記第２のコイル２０と第４のコイル２６とは対向しているため、それぞれ同方向の信号が入力した場合、第２のコイル導体１３と第４のコイル導体１５とは互いに磁気結合するものである。   Since the second coil 20 and the fourth coil 26 face each other, when signals in the same direction are input, the second coil conductor 13 and the fourth coil conductor 15 are magnetically coupled to each other. To do.

なお、上記本発明の一実施の形態においては、第１のコイル導体１２と第２のコイル導体１３とを第２の絶縁体層１１ｂの同一面に形成するとともに、第３のコイル導体１４と第４のコイル導体１５とを第３の絶縁体層１１ｃの同一面に形成しているが、必ずしもこのようにする必要はなく、これ以外に、例えば、前記第１のコイル導体１２および第３のコイル導体１４を、第２のコイル導体１３および第４のコイル導体１５の上方または下方に形成してもよく、このような構成にすれば、実装面積を小さくすることができるものである。   In the embodiment of the present invention, the first coil conductor 12 and the second coil conductor 13 are formed on the same surface of the second insulator layer 11b, and the third coil conductor 14 Although the fourth coil conductor 15 and the third insulator layer 11c are formed on the same surface, it is not always necessary to do so. For example, the first coil conductor 12 and the third coil conductor 15 are not necessarily required. The coil conductor 14 may be formed above or below the second coil conductor 13 and the fourth coil conductor 15. With such a configuration, the mounting area can be reduced.

また、前記第１〜第４のコイル導体１２〜１５のそれぞれの長さを略同一にすれば、各コイル導体１２〜１５のインダクタンスや抵抗値を同一にすることができるため、実装時の方向を変えても同一の出力信号が得られるものである。なお、第１〜第４のコイル導体１２〜１５のそれぞれの長さは、出力信号のばらつきとしてユーザが許容できる範囲内にあればよい。   Further, if the lengths of the first to fourth coil conductors 12 to 15 are made substantially the same, the inductance and resistance values of the coil conductors 12 to 15 can be made the same. Even if is changed, the same output signal can be obtained. In addition, each length of the 1st-4th coil conductors 12-15 should just be in the range which a user can accept | permit as a variation of an output signal.

ここで、前記第１〜第４のコイル１７，２０，２３，２６の形状は、渦巻き状に限定されるものではなく、螺旋状、蛇行状等の他の形状であっても構わない。また、前記第１〜第４のコイル１７，２０，２３，２６および第１〜第４の引出電極１８，２１，２４，２７は、めっきで形成するのではなく、その他の印刷や蒸着等の方法で形成してもよい。   Here, the shape of the first to fourth coils 17, 20, 23, 26 is not limited to a spiral shape, and may be other shapes such as a spiral shape and a meandering shape. The first to fourth coils 17, 20, 23, and 26 and the first to fourth extraction electrodes 18, 21, 24, and 27 are not formed by plating, but may be other printing or vapor deposition. It may be formed by a method.

そしてまた、前記第１の絶縁体層１１ａの上部にはダミー絶縁体層２９が形成されているもので、このダミー絶縁体層２９の枚数および前記第１〜第４の絶縁体層１１ａ〜１１ｄの枚数は、図１に示された枚数に限定されるものではない。   Further, a dummy insulator layer 29 is formed on the first insulator layer 11a. The number of the dummy insulator layers 29 and the first to fourth insulator layers 11a to 11d. The number of sheets is not limited to the number shown in FIG.

そして、上記した構成部品により、図２に示すような積層体１６が形成され、かつこの積層体１６の一端部から他端部に向かって順に、積層体１６の一側面に第１の外部電極３１、第２の外部電極３２、第３の外部電極３３、第４の外部電極３４が形成され、さらに、この積層体１６の一端部から他端部に向かって順に、積層体１６の他の側面に第５の外部電極３５、第６の外部電極３６、第７の外部電極３７、第８の外部電極３８が形成されている。   A laminated body 16 as shown in FIG. 2 is formed by the above-described components, and the first external electrode is formed on one side surface of the laminated body 16 in order from one end portion to the other end portion of the laminated body 16. 31, the second external electrode 32, the third external electrode 33, and the fourth external electrode 34 are formed, and the other members of the multilayer body 16 are sequentially arranged from one end portion to the other end portion of the multilayer body 16. A fifth external electrode 35, a sixth external electrode 36, a seventh external electrode 37, and an eighth external electrode 38 are formed on the side surfaces.

このとき、第１の外部電極３１は第１のコイル導体１２の一端部１２ａと接続され、そしてこれと同様に、第２の外部電極３２は第２のコイル導体１３の一端部１３ａと、第３の外部電極３３は第３のコイル導体１４の一端部１４ａと、第４の外部電極３４は第４のコイル導体１５の一端部１５ａと、第５の外部電極３５は第１のコイル導体１２の他端部１２ｂと、第６の外部電極３６は第２のコイル導体１３の他端部１３ｂと、第７の外部電極３７は第３のコイル導体１４の他端部１４ｂと、第８の外部電極３８は第４のコイル導体１５の他端部１５ｂとそれぞれ接続されるものである。   At this time, the first external electrode 31 is connected to the one end portion 12a of the first coil conductor 12, and similarly, the second external electrode 32 is connected to the one end portion 13a of the second coil conductor 13 and the first coil conductor 12. The third external electrode 33 is one end portion 14 a of the third coil conductor 14, the fourth external electrode 34 is one end portion 15 a of the fourth coil conductor 15, and the fifth external electrode 35 is the first coil conductor 12. The other end portion 12b of the second coil conductor 13, the sixth outer electrode 36 is the other end portion 13b of the second coil conductor 13, and the seventh outer electrode 37 is the other end portion 14b of the third coil conductor 14. The external electrode 38 is connected to the other end 15 b of the fourth coil conductor 15.

なお、前記第１〜第８の外部電極３１〜３８は、銀を印刷することによって形成されているもので、その表面には、ニッケルめっき層、すずめっき層が施されている。   In addition, the said 1st-8th external electrodes 31-38 are formed by printing silver, The nickel plating layer and the tin plating layer are given to the surface.

次に、本発明の一実施の形態における積層型バルントランスの製造方法について説明する。   Next, a manufacturing method of the laminated balun transformer in one embodiment of the present invention will be described.

図１、図２において、まず、それぞれの原材料である磁性材料や誘電材料の粉体および樹脂からなる混合物により、方形の第１〜第４の絶縁体層１１ａ〜１１ｄ、ダミー絶縁体層２９をそれぞれ所定枚数作製する。このとき、第１、第３の絶縁体層１１ａ，１１ｃの所定箇所に、レーザ、パンチングなどで孔あけ加工をし、この孔に銀を充填して、バイア電極１９，２２，２５，２８を形成する。   In FIG. 1 and FIG. 2, first, the rectangular first to fourth insulator layers 11a to 11d and the dummy insulator layer 29 are made of a mixture of powders and resins of magnetic materials and dielectric materials as raw materials. Prepare a predetermined number of each. At this time, the first and third insulator layers 11a and 11c are drilled at a predetermined position by laser, punching, etc., and the holes are filled with silver, and the via electrodes 19, 22, 25, and 28 are formed. Form.

次に、第４の絶縁体層１１ｄの上面に第３、第４の引出電極２４，２７をめっきによって形成する。   Next, third and fourth extraction electrodes 24 and 27 are formed on the upper surface of the fourth insulator layer 11d by plating.

次に、第３、第４の引出電極２４，２７の上面に、バイア電極２５，２８が設けられた第３の絶縁体層１１ｃを配置する。このとき、第３の引出電極２４とバイア電極２５とを接続するとともに、第４の引出電極２７とバイア電極２８とを接続する。   Next, the third insulator layer 11 c provided with the via electrodes 25 and 28 is disposed on the upper surfaces of the third and fourth extraction electrodes 24 and 27. At this time, the third extraction electrode 24 and the via electrode 25 are connected, and the fourth extraction electrode 27 and the via electrode 28 are connected.

次に、第３の絶縁体層１１ｃの上面に、第３、第４のコイル２３，２６をめっきによって形成する。このとき、第３のコイル２３とバイア電極２５とを接続して、第３のコイル２３と第３の引出電極２４とを接続し、第３のコイル導体１４を形成する。また、これと同様に、第４のコイル２６とバイア電極２８とを接続して、第４のコイル２６と第４の引出電極２７とを接続し、第４のコイル導体１５を形成する。   Next, the third and fourth coils 23 and 26 are formed on the upper surface of the third insulator layer 11c by plating. At this time, the third coil 23 and the via electrode 25 are connected, the third coil 23 and the third extraction electrode 24 are connected, and the third coil conductor 14 is formed. Similarly, the fourth coil 26 and the via electrode 28 are connected, the fourth coil 26 and the fourth lead electrode 27 are connected, and the fourth coil conductor 15 is formed.

次に、第３、第４のコイル２３，２６の上面に、第２の絶縁体層１１ｂを配置する。その後、その上面に第１、第２のコイル１７，２０をめっきによって形成する。このとき、第１のコイル１７と第３のコイル２３とを対向させるとともに、第２のコイル２０と第４のコイル２６とを対向させる。   Next, the second insulator layer 11 b is disposed on the upper surfaces of the third and fourth coils 23 and 26. Thereafter, the first and second coils 17 and 20 are formed on the upper surface by plating. At this time, the first coil 17 and the third coil 23 are opposed to each other, and the second coil 20 and the fourth coil 26 are opposed to each other.

次に、第１、第２のコイル１７，２０の上面に、バイア電極１９，２２が設けられた第１の絶縁体層１１ａを配置する。このとき、第１のコイル１７とバイア電極１９とを接続するとともに、第２のコイル２０とバイア電極２２とを接続する。   Next, the first insulator layer 11 a provided with the via electrodes 19 and 22 is disposed on the upper surfaces of the first and second coils 17 and 20. At this time, the first coil 17 and the via electrode 19 are connected, and the second coil 20 and the via electrode 22 are connected.

次に、第１の絶縁体層１１ａの上面に、第１、第２の引出電極１８，２１をめっきによって形成する。このとき、第１の引出電極１８とバイア電極１９とを接続して、第１のコイル１７と第１の引出電極１８とを接続し、第１のコイル導体１２を形成する。また、これと同様に、第２の引出電極２１とバイア電極２２とを接続して、第２のコイル２０と第２の引出電極２１とを接続し、第２のコイル導体１３を形成する。   Next, the first and second extraction electrodes 18 and 21 are formed on the upper surface of the first insulator layer 11a by plating. At this time, the first extraction electrode 18 and the via electrode 19 are connected, the first coil 17 and the first extraction electrode 18 are connected, and the first coil conductor 12 is formed. Similarly, the second extraction electrode 21 and the via electrode 22 are connected, the second coil 20 and the second extraction electrode 21 are connected, and the second coil conductor 13 is formed.

なお、前記第１〜第４のコイル１７，２０，２３，２６および第１〜第４の引出電極１８，２１，２４，２７の形成方法は、別途用意したベース板（図示せず）に所定パターン形状の導体をめっきによって形成し、その後、この導体を各絶縁体層に転写することにより形成する。   The first to fourth coils 17, 20, 23 and 26 and the first to fourth extraction electrodes 18, 21, 24 and 27 are formed on a separately prepared base plate (not shown). A pattern-shaped conductor is formed by plating, and the conductor is then transferred to each insulator layer.

次に、第１、第２の引出電極１８，２１の上面に、所定枚数のダミー絶縁体層２９を配置して、積層体１６を形成する。   Next, a predetermined number of dummy insulator layers 29 are arranged on the top surfaces of the first and second extraction electrodes 18 and 21 to form the laminate 16.

次に、積層体１６を所定の温度、時間で焼成する。   Next, the laminate 16 is fired at a predetermined temperature and time.

次に、積層体１６の両側面に、銀を印刷することにより第１〜第８の外部電極３１〜３８を形成する。   Next, first to eighth external electrodes 31 to 38 are formed on both side surfaces of the laminate 16 by printing silver.

このとき、積層体１６の一端部から他端部に向かって順に、積層体１６の一側面に第１の外部電極３１、第２の外部電極３２、第３の外部電極３３、第４の外部電極３４を形成する。さらに、この積層体１６の一端部から他端部に向かって順に、積層体１６の他の側面に第５の外部電極３５、第６の外部電極３６、第７の外部電極３７、第８の外部電極３８を形成する。   At this time, the first external electrode 31, the second external electrode 32, the third external electrode 33, and the fourth external electrode are arranged on one side surface of the multilayer body 16 in order from one end to the other end of the multilayer body 16. An electrode 34 is formed. Further, in order from one end portion to the other end portion of the laminate 16, a fifth external electrode 35, a sixth external electrode 36, a seventh external electrode 37, and an eighth electrode are provided on the other side surface of the laminate 16. The external electrode 38 is formed.

これにより、第１のコイル導体１２の一端部１２ａと第１の外部電極３１とが接続され、そしてこれと同様に、第２のコイル導体１３の一端部１３ａと第２の外部電極３２、第３のコイル導体１４の一端部１４ａと第３の外部電極３３、第４のコイル導体１５の一端部１５ａと第４の外部電極３４、第１のコイル導体１２の他端部１２ｂと第５の外部電極３５、第２のコイル導体１３の他端部１３ｂと第６の外部電極３６、第３のコイル導体１４の他端部１４ｂと第７の外部電極３７、第４のコイル導体１５の他端部１５ｂと第８の外部電極３８とがそれぞれ接続されるものである。   Thereby, the one end part 12a of the first coil conductor 12 and the first external electrode 31 are connected, and similarly, the one end part 13a of the second coil conductor 13 and the second external electrode 32, One end 14a of the third coil conductor 14 and the third external electrode 33, one end 15a and the fourth external electrode 34 of the fourth coil conductor 15, and the other end 12b of the first coil conductor 12 and the fifth Other than the external electrode 35, the other end 13 b of the second coil conductor 13 and the sixth external electrode 36, the other end 14 b of the third coil conductor 14, the seventh external electrode 37, and the fourth coil conductor 15 The end 15b and the eighth external electrode 38 are connected to each other.

最後に、前記第１〜第８の外部電極３１〜３８の表面に、めっきによってニッケルめっき層、すずめっき層を形成する。   Finally, a nickel plating layer and a tin plating layer are formed on the surfaces of the first to eighth external electrodes 31 to 38 by plating.

図３は上記本発明の一実施の形態における積層型バルントランスの等価回路図を示したものである。   FIG. 3 is an equivalent circuit diagram of the laminated balun transformer according to the embodiment of the present invention.

図４（ａ）は上記本発明の一実施の形態における積層型バルントランスを使用する場合の一例を示したものである。   FIG. 4A shows an example in the case of using the laminated balun transformer in one embodiment of the present invention.

図４（ａ）において、入力端子４１を第１の外部電極３１に接続し、第５、第６の外部電極３５，３６を第１の出力端子４２ａに接続し、さらに第７、第８の外部電極３７，３８を第２の出力端子４２ｂに接続している。また、第２〜第４の外部電極３２〜３４はグランドに接続している。ここで、第５、第６の外部電極３５，３６のペアを第１の出力端子４２ａに接続し、かつ第７、第８の外部電極３７，３８のペアを第２の出力端子４２ｂに接続することにより、バルントランスとして成立させている。   In FIG. 4A, the input terminal 41 is connected to the first external electrode 31, the fifth and sixth external electrodes 35 and 36 are connected to the first output terminal 42a, and the seventh and eighth The external electrodes 37 and 38 are connected to the second output terminal 42b. The second to fourth external electrodes 32 to 34 are connected to the ground. Here, a pair of the fifth and sixth external electrodes 35 and 36 is connected to the first output terminal 42a, and a pair of the seventh and eighth external electrodes 37 and 38 is connected to the second output terminal 42b. By doing so, it has been established as a balun transformer.

このような構成とすることによって、不平衡信号が入力端子４１から第１の外部電極３１を介して入ってきたとき、第１のコイル導体１２を通り第５の外部電極３５を介して第１の出力端子４２ａに流出する信号と、第１のコイル導体１２と第３のコイル導体１４とが磁気結合して第７の外部電極３７を介して第２の出力端子４２ｂに流出する信号の２つの信号からなる平衡信号に変換されるものである。   With this configuration, when an unbalanced signal enters from the input terminal 41 via the first external electrode 31, it passes through the first coil conductor 12 and the first external electrode 35 via the first external electrode 35. 2 of the signal that flows out to the output terminal 42a of the first and second signals that flow out to the second output terminal 42b via the seventh external electrode 37 when the first coil conductor 12 and the third coil conductor 14 are magnetically coupled. It is converted into a balanced signal consisting of two signals.

図４（ｂ）は上記した図４（ａ）の状態の積層型バルントランスを１８０°回転させた状態を示す図である。   FIG. 4B is a view showing a state in which the stacked balun transformer in the state of FIG.

この場合、入力端子４１から入ってきた不平衡信号は、第８の外部電極３８を通り、第４のコイル導体１５、第４の外部電極３４を介して第１の出力端子４２ａに流出する信号と、第４のコイル導体１５と第２のコイル導体１３とが磁気結合して第２の外部電極３２を介して第２の出力端子４２ｂに流出する信号の２つの信号からなる平衡信号に変換されたものである。   In this case, the unbalanced signal that has entered from the input terminal 41 passes through the eighth external electrode 38 and flows out to the first output terminal 42 a via the fourth coil conductor 15 and the fourth external electrode 34. And the fourth coil conductor 15 and the second coil conductor 13 are magnetically coupled to each other and converted to a balanced signal composed of two signals that flow out to the second output terminal 42b via the second external electrode 32. It has been done.

図４（ｃ）は上記した図４（ａ）の状態の積層型バルントランスを上下逆にした状態を示す図である。   FIG. 4C is a diagram showing a state in which the stacked balun transformer in the state of FIG. 4A described above is turned upside down.

この場合も、入力端子４１から入ってきた不平衡信号は、第５の外部電極３５を通り、第１のコイル導体１２、第１の外部電極３１を介して第１の出力端子４２ａに流出する信号と、第１のコイル導体１２と第２のコイル導体１３とが磁気結合して第２の外部電極３２を介して第２の出力端子４２ｂに流出する信号の２つの信号からなる平衡信号に変換されるものである。   Also in this case, the unbalanced signal that has entered from the input terminal 41 passes through the fifth external electrode 35 and flows out to the first output terminal 42 a via the first coil conductor 12 and the first external electrode 31. A balanced signal composed of two signals, the signal and the first coil conductor 12 and the second coil conductor 13 are magnetically coupled to each other and flow out to the second output terminal 42b through the second external electrode 32. It is to be converted.

上述したように、本発明の一実施の形態における積層型バルントランスは、１８０°回転した状態となった場合や、上下が逆になった場合に実装されても、バルントランスとして動作させることができるものである。   As described above, the laminated balun transformer according to the embodiment of the present invention can be operated as a balun transformer even when it is mounted in a state where it is rotated 180 ° or upside down. It can be done.

また、図４（ａ）においては、第１の外部電極３１に入力端子４１を接続したが、この入力端子４１は他の第２〜第４の外部電極３２〜３４のいずれかに接続してもよく、この場合も、図４（ｂ）、（ｃ）のように１８０°回転した状態となった場合や、上下が逆になった場合に実装されても、同様にバルントランスとして動作させることができるものである。   In FIG. 4A, the input terminal 41 is connected to the first external electrode 31, but this input terminal 41 is connected to any of the other second to fourth external electrodes 32-34. In this case as well, even if it is mounted when it is rotated 180 ° as shown in FIGS. 4B and 4C or when the top and bottom are reversed, it is similarly operated as a balun transformer. It is something that can be done.

そしてまた、前記第１の外部電極３１だけでなく第４の外部電極３４にも不平衡信号を入力させるようにしてもよく、さらには第１の外部電極３１と第４の外部電極３４とに平衡信号を出力させ、第５、第６の外部電極３５，３６と、第７、第８の外部電極３７，３８とに不平衡信号を入力させるようにしてもよいものである。   In addition, an unbalanced signal may be input not only to the first external electrode 31 but also to the fourth external electrode 34, and further to the first external electrode 31 and the fourth external electrode 34. A balanced signal may be output, and an unbalanced signal may be input to the fifth and sixth external electrodes 35 and 36 and the seventh and eighth external electrodes 37 and 38.

上記した本発明の一実施の形態においては、第１のコイル導体１２の少なくとも一部（第１のコイル１７）と第３のコイル導体１４の少なくとも一部（第３のコイル２３）を第２の絶縁体層１１ｂを介して対向させ、かつ第２のコイル導体１３の少なくとも一部（第２のコイル２０）と第４のコイル導体１５の少なくとも一部（第４のコイル２６）を第２の絶縁体層１１ｂを介して対向させ、さらに積層体１６の一端部から他端部に向かって順に、前記積層体１６の一側面に前記第１のコイル導体１２の一端部１２ａ、前記第２のコイル導体１３の一端部１３ａ、前記第３のコイル導体１４の一端部１４ａ、前記第４のコイル導体１５の一端部１５ａを露出させ、前記積層体１６の他の側面に前記第１のコイル導体１２の他端部１２ｂ、前記第２のコイル導体１３の他端部１３ｂ、前記第３のコイル導体１４の他端部１４ｂ、前記第４のコイル導体１５の他端部１５ｂを露出させているため、この露出した第１〜第４のコイル導体１２，１３，１４，１５の一端部１２ａ，１３ａ，１４ａ，１５ａに４つの外部電極３１，３２，３３，３４を接続するとともに、第１〜第４のコイル導体１２，１３，１４，１５の他端部１２ｂ，１３ｂ，１４ｂ，１５ｂに４つの外部電極３５，３６，３７，３８を接続すれば、８つの外部電極３１〜３８のうち、半分３１，３２，３３，３４を積層体１６の一側面に、もう半分３５，３６，３７，３８を積層体１６の他の側面に形成することができ、さらに、すべての外部電極に不平衡信号や平衡信号を流入、流出させることができるため、実装時に方向性を確認する必要がない積層型バルントランスを提供することができるという効果が得られるものである。   In the above-described embodiment of the present invention, at least a part of the first coil conductor 12 (first coil 17) and at least a part of the third coil conductor 14 (third coil 23) are connected to the second. Of the second coil conductor 13 (second coil 20) and at least part of the fourth coil conductor 15 (fourth coil 26). The one end portion 12a of the first coil conductor 12 is disposed on one side surface of the multilayer body 16 in order from the one end portion of the multilayer body 16 toward the other end portion. One end portion 13a of the coil conductor 13, the one end portion 14a of the third coil conductor 14, and the one end portion 15a of the fourth coil conductor 15 are exposed, and the first coil is formed on the other side surface of the multilayer body 16. The other end 12b of the conductor 12, The other end portion 13b of the second coil conductor 13, the other end portion 14b of the third coil conductor 14, and the other end portion 15b of the fourth coil conductor 15 are exposed. The four external electrodes 31, 32, 33, 34 are connected to one end portions 12a, 13a, 14a, 15a of the four coil conductors 12, 13, 14, 15 and the first to fourth coil conductors 12, 13, If the four external electrodes 35, 36, 37, 38 are connected to the other end portions 12 b, 13 b, 14 b, 15 b of 14, 15, the halves 31, 32, 33, 34 of the eight external electrodes 31-38 are connected. The other half 35, 36, 37, 38 can be formed on one side of the laminate 16 on the other side of the laminate 16, and an unbalanced signal or a balanced signal is caused to flow into and out of all the external electrodes. Can be implemented at the time In which there is an advantage that it is possible to provide a laminated balun transformer is not necessary to check the directionality.

すなわち、外部電極３１〜３８の結線が左右、上下対称で、無極性となる。   That is, the connection of the external electrodes 31 to 38 is left-right and vertically symmetrical, and is nonpolar.

また、上記した本発明の一実施の形態における積層型バルントランスを、アンテナや携帯機器等の電子機器の平衡−不平衡信号変換に用いるようにすれば、実装時に方向性を確認する必要がない積層バルントランスを用いることができるため、実装が容易な電子機器を得ることができるという効果が得られるものである。   Further, if the laminated balun transformer in the embodiment of the present invention described above is used for balanced-unbalanced signal conversion of an electronic device such as an antenna or a portable device, it is not necessary to confirm the directionality at the time of mounting. Since a laminated balun transformer can be used, an effect that an electronic device that can be easily mounted can be obtained can be obtained.

この場合は、例えば、第１〜第４のコイル導体１２，１３，１４，１５の一端部１２ａ，１３ａ，１４ａ，１５ａのうちいずれか１つに不平衡信号ラインを接続し、かつ第１、第２のコイル導体１２，１３の他端部１２ｂ，１３ｂと第３、第４のコイル導体１４，１５の他端部１４ｂ，１５ｂにそれぞれ平衡信号ラインを接続すればよい。   In this case, for example, an unbalanced signal line is connected to any one of the one end portions 12a, 13a, 14a, and 15a of the first to fourth coil conductors 12, 13, 14, and 15, and the first, The balanced signal lines may be connected to the other end portions 12b, 13b of the second coil conductors 12, 13 and the other end portions 14b, 15b of the third and fourth coil conductors 14, 15, respectively.

本発明に係る積層型バルントランスは、実装時に方向性を確認する必要がないという効果を有するものであり、デジタル機器やＡＶ機器、情報通信端末等の各種電子機器の平衡−不平衡信号変換等に使用される積層型バルントランス等において有用となるものである。   The laminated balun transformer according to the present invention has an effect that it is not necessary to confirm directionality when mounted, such as balanced-unbalanced signal conversion of various electronic devices such as digital devices, AV devices, and information communication terminals. This is useful in a laminated balun transformer used in the above.

本発明の一実施の形態における積層型バルントランスの分解斜視図The exploded perspective view of the lamination type balun transformer in one embodiment of the present invention 同積層型バルントランスの斜視図Perspective view of the same balun transformer 同積層型バルントランスの等価回路図Equivalent circuit diagram of the same laminated balun transformer （ａ）同積層型バルントランスを使用する場合の一例を示す図、（ｂ）（ａ）の状態の積層型バルントランスを１８０°回転させた状態を示す図、（ｃ）（ａ）の状態の積層型バルントランスを上下逆にした状態を示す図(A) The figure which shows an example in the case of using the same lamination type balun transformer, (b) The figure which shows the state which rotated the lamination type balun transformer of the state of (a) 180 degrees, (c) The state of (a) Of a laminated balun transformer upside down 従来の積層型バルントランスの分解斜視図Exploded perspective view of a conventional laminated balun transformer 同積層型バルントランスの斜視図Perspective view of the same balun transformer

符号の説明Explanation of symbols

１１ａ〜１１ｄ 第１〜第４の絶縁体層
１２ 第１のコイル導体
１３ 第２のコイル導体
１４ 第３のコイル導体
１５ 第４のコイル導体
１６ 積層体 11a-11d 1st-4th insulator layer 12 1st coil conductor 13 2nd coil conductor 14 3rd coil conductor 15 4th coil conductor 16 Laminated body

Claims (4)

上下方向に積層された複数の絶縁体層と、前記複数の絶縁体層に設けられた第１〜第４のコイル導体と、前記複数の絶縁体層および前記第１〜第４のコイル導体からなる積層体とを備え、前記第１のコイル導体の少なくとも一部と前記第３のコイル導体の少なくとも一部を前記複数の絶縁体層のうち一部を介して対向させ、かつ前記第２のコイル導体の少なくとも一部と前記第４のコイル導体の少なくとも一部を前記複数の絶縁体層のうち一部を介して対向させ、さらに前記積層体の一端部から他端部に向かって順に、前記積層体の一側面に前記第１のコイル導体の一端部と接続された第１の外部電極、前記第２のコイル導体の一端部と接続された第２の外部電極、前記第３のコイル導体の一端部と接続された第３の外部電極、前記第４のコイル導体の一端部と接続された第４の外部電極をそれぞれ形成し、かつ前記積層体の他の側面に前記第１のコイル導体の他端部と接続された第５の外部電極、前記第２のコイル導体の他端部と接続された第６の外部電極、前記第３のコイル導体の他端部と接続された第７の外部電極、前記第４のコイル導体の他端部と接続された第８の外部電極をそれぞれ形成し、さらに、前記積層体の一側面、他の側面のいずれか一方に形成された外部電極のうちいずれか１つを入力端子に接続し、前記入力端子と接続された外部電極が形成された側面と異なる側面に形成された外部電極において互いに隣り合う２つの外部電極２組をそれぞれ第１の出力端子、第２の出力端子に接続した積層型バルントランス。 From a plurality of insulator layers stacked in the vertical direction, first to fourth coil conductors provided on the plurality of insulator layers, the plurality of insulator layers and the first to fourth coil conductors And at least a part of the first coil conductor and at least a part of the third coil conductor are opposed to each other through a part of the plurality of insulator layers, and the second At least a part of the coil conductor and at least a part of the fourth coil conductor are opposed to each other through a part of the plurality of insulator layers, and further sequentially from one end part to the other end part of the multilayer body, A first external electrode connected to one end of the first coil conductor, a second external electrode connected to one end of the second coil conductor, and the third coil on one side of the laminate third external electrode connected to one end portion of the conductor, the fourth co The fourth external electrodes are formed respectively, and said first fifth external electrodes connected to the other end of the coil conductor to another aspect of the laminate which is connected to one end portion of the Le conductor, said first sixth external electrode connected to the other end of the second coil conductor, wherein the third seventh external electrode connected to the other end of the coil conductor, connected to the other end of the fourth coil conductor And forming one of the external electrodes formed on either one side or the other side of the laminate, and connecting the input terminal to the input terminal. A laminated balun transformer in which two sets of two external electrodes adjacent to each other are connected to the first output terminal and the second output terminal in the external electrode formed on the side surface different from the side surface on which the external electrode connected to is formed . 第１のコイル導体および第３のコイル導体を、第２のコイル導体および第４のコイル導体の上方または下方に設けた請求項１記載の積層型バルントランス。 The laminated balun transformer according to claim 1, wherein the first coil conductor and the third coil conductor are provided above or below the second coil conductor and the fourth coil conductor. 第１〜第４のコイル導体のそれぞれの長さを略同一にした請求項１記載の積層型バルントランス。 The multilayer balun transformer according to claim 1, wherein the first to fourth coil conductors have substantially the same length. 請求項１記載の積層型バルントランスの入力端子に不平衡信号ラインを接続し、かつ第１、第２の出力端子にそれぞれ平衡信号ラインを接続した電子機器。 An electronic apparatus in which an unbalanced signal line is connected to an input terminal of the multilayer balun transformer according to claim 1 and a balanced signal line is connected to each of first and second output terminals .
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JP4214700B2 (en) * 2002-01-22 2009-01-28 株式会社村田製作所 Common mode choke coil array
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JPH07176918A (en) * 1993-12-17 1995-07-14 Murata Mfg Co Ltd Chip type transformer
JP2002141228A (en) * 2000-11-06 2002-05-17 Matsushita Electric Ind Co Ltd High-frequency transformer
JP2005217268A (en) * 2004-01-30 2005-08-11 Tdk Corp Electronic component

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