JP2010232777A - Band pass filter, and radio communication module and radio communication apparatus using the same - Google Patents

Band pass filter, and radio communication module and radio communication apparatus using the same Download PDF

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JP2010232777A
JP2010232777A JP2009075737A JP2009075737A JP2010232777A JP 2010232777 A JP2010232777 A JP 2010232777A JP 2009075737 A JP2009075737 A JP 2009075737A JP 2009075737 A JP2009075737 A JP 2009075737A JP 2010232777 A JP2010232777 A JP 2010232777A
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JP5171710B2 (en
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Masafumi Horiuchi
雅史 堀内
Hiromichi Yoshikawa
博道 吉川
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Kyocera Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a band pass filter which has two wide pass bands and an attenuation pole formed between them, and a radio communication module and a radio communication apparatus using the filter. <P>SOLUTION: The band pass filter is provided with first to fourth resonant electrode 30a, 30b, 30c, 30d which form a first pass band, a resonant electrode coupling conductor 35 which couples the first and the third resonant electrodes 30a, 30c, the first and the second composite resonant electrodes 29a, 29b which form a second pass band, a first input and output coupling electrode 40a which couples with the first resonant electrode 30a, a second input and output coupling electrode 41a which couples with a first projection unit 28a of the first composite resonant electrode 29a, a third input and output coupling electrode 40b which couples with the third resonant electrode 30c, and a fourth input and output coupling electrode 41b which couples with a second projection unit 28b of the second composite resonant electrode 29b. The fourth resonant electrode 30d is a 1/2 wavelength resonator, and the other resonant electrodes are 1/4 wavelength resonators. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、バンドパスフィルタならびにそれを用いた無線通信モジュールおよび無線通信機器に関するものであり、特に、２つの通過帯域を有するバンドパスフィルタならびにそれを用いた無線通信モジュールおよび無線通信機器に関するものである。   The present invention relates to a bandpass filter, a wireless communication module and a wireless communication device using the same, and more particularly to a bandpass filter having two pass bands, a wireless communication module and a wireless communication device using the same. is there.

近年、新しい通信手段としてＵＷＢが着目されている。ＵＷＢは10ｍ程度の短い距離において広い周波数帯域を使用して大容量のデータ転送を実現するものであり、例えば米国ＦＣＣ（Federal Communication Commission）の規定によると3.1〜10.6ＧＨｚの周波数帯域を使用する計画となっている。このようにＵＷＢの特徴は非常に広い周波数帯域を用いることである。   In recent years, UWB has attracted attention as a new communication means. UWB realizes large-capacity data transfer using a wide frequency band over a short distance of about 10 m. For example, according to US FCC (Federal Communication Commission) regulations, a plan to use a frequency band of 3.1 to 10.6 GHz It has become. Thus, the feature of UWB is that it uses a very wide frequency band.

このようなＵＷＢに使用可能な超広帯域のフィルタに関する研究は近年盛んに行なわれており、例えば、方向性結合器の原理を応用したバンドパスフィルタによって、通過帯域幅が比帯域（帯域幅／中心周波数）で100％を超える広帯域な特性が得られたとの報告がある（例えば、非特許文献１を参照。）。   In recent years, research on ultra-wideband filters that can be used for UWB has been actively conducted. For example, a bandpass filter that applies the principle of a directional coupler has a passband width of a specific bandwidth (bandwidth / center). There is a report that a broadband characteristic exceeding 100% is obtained in (frequency) (for example, see Non-Patent Document 1).

一方、従来よく使用されるフィルタとして、複数の１／４波長ストリップライン共振器を併設して相互に結合させて構成したバンドパスフィルタが知られている（例えば、特許文献１を参照。）。   On the other hand, as a filter often used conventionally, there is known a band-pass filter configured by connecting a plurality of quarter-wavelength stripline resonators to each other (see, for example, Patent Document 1).

特開2004−180032号公報JP 2004-180032 A

「マイクロストリップ−ＣＰＷブロードサイド結合構造を用いた超広帯域バンドパスフィルタ」2005年３月電子情報通信学会総合大会講演論文集 C-2-114 p.147“Ultra-wideband bandpass filter using microstrip-CPW broadside coupling structure” Proceedings of the March 2005 IEICE General Conference C-2-114 p.147

しかしながら、非特許文献１および特許文献１にて提案されたバンドパスフィルタはそれぞれ問題点を有しており、ＵＷＢ用のバンドパスフィルタには適さないものであった。   However, the band-pass filters proposed in Non-Patent Document 1 and Patent Document 1 each have problems, and are not suitable for UWB band-pass filters.

例えば、非特許文献１にて提案されたバンドパスフィルタは通過帯域幅が広すぎるという問題があった。すなわち、ＵＷＢは基本的には3.1ＧＨｚ〜10.6ＧＨｚの周波数帯域を使用するが、国際電気通信連合無線通信部門では、ＩＥＥＥ802.11.aで使用する5.3ＧＨｚを避ける形で3.1〜4.7ＧＨｚ程度の帯域を使用するLow Band（ローバンド）と６ＧＨｚ〜10.6ＧＨｚ程度の帯域を使用するHigh Band（ハイバンド）とに分割した企画が立案されている。よって、ＵＷＢのLow BandおよびHigh Bandに使用されるフィルタには、それぞれ比帯域で40％〜50％程度の通過帯域幅と5.3ＧＨｚにおける減衰が同時に要求されるため、通過帯域幅が比帯域で100％を超えるような特性を有する非特許文献１にて提案されたバンドパスフィルタは通過帯域幅が広すぎて使えないものであった。   For example, the bandpass filter proposed in Non-Patent Document 1 has a problem that the passband width is too wide. In other words, UWB basically uses a frequency band of 3.1 GHz to 10.6 GHz, but the International Telecommunication Union wireless communication section is about 3.1 to 4.7 GHz avoiding 5.3 GHz used in IEEE802.11.a. A plan that divides into a low band using a band and a high band using a band of about 6 GHz to 10.6 GHz has been developed. Therefore, the filters used for the UWB Low Band and High Band each require a pass bandwidth of about 40% to 50% in the specific band and attenuation at 5.3 GHz. The band-pass filter proposed in Non-Patent Document 1 having characteristics exceeding 100% cannot be used because its pass band width is too wide.

また、従来の１／４波長共振器を使用したバンドパスフィルタの通過帯域幅は狭すぎ、広帯域化を図った特許文献１に記載のバンドパスフィルタの通過帯域幅であっても比帯域で10％にも満たないものであった。よって、比帯域で40％〜50％に相当する広い通過帯域幅を要求されるＵＷＢ用のバンドパスフィルタとして使えるものではなかった。   Further, the pass band width of a bandpass filter using a conventional quarter wavelength resonator is too narrow, and even if the pass band width of the band pass filter described in Patent Document 1 is intended to be wide, it is 10 It was less than%. Therefore, it cannot be used as a band-pass filter for UWB requiring a wide pass bandwidth corresponding to 40% to 50% in the specific band.

本発明はこのような従来の技術における問題点に鑑みて案出されたものであり、その目的は、ＵＷＢのLow Band用フィルタおよびHigh Band用フィルタを１つのフィルタでまかなうことが可能な、広い２つの通過帯域を有するとともに、２つの通過帯域の間に減衰極が形成されたバンドパスフィルタならびにそれを用いた無線通信モジュールおよび無線通信機器を提供することにある。   The present invention has been devised in view of such problems in the prior art, and the purpose thereof is wide, which can cover a UWB low band filter and a high band filter with a single filter. An object of the present invention is to provide a bandpass filter having two passbands and having an attenuation pole formed between the two passbands, and a radio communication module and a radio communication device using the same.

本発明のバンドパスフィルタは、複数の誘電体層が積層されてなる積層体と、該積層体の上面および下面の少なくとも一方に配置された接地電極と、基部ならびに帯状の第１および第２の突起部によってそれぞれ構成された第１および第２の複合共振電極であって、前記基部の一方端が接地され、前記第１および第２の突起部が前記基部の他方端に各々の一方端が接続されて横並びに配置され、前記基部の前記一方端が各々の前記複合共振電極の一方端となり、前記突起部の他方端が各々の前記複合共振電極の他方端となり、各々の前記複合共振電極の前記基部および前記突起部を合わせた全体が第１の周波数で共振する共振器として機能するとともに、各々の前記複合共振電極の前記突起部が前記第１の周波数よりも高い第２の周波数で共振する共振器として機能し、各々の前記複合共振電極の前記一方端が逆側に位置するとともに前記第１の複合共振電極の前記第２の突起部および前記第２の複合共振電極の前記第１の突起部が隣接するように前記積層体の第１の層間に横並びに配置された、第１および第２の複合共振電極と、前記積層体の前記第１の層間とは異なる第２の層間に横並びに順次配置された、それぞれ一方端が接地されて１／４波長共振器として機能する帯状の第１乃至第３の共振電極と、前記第２の層間を間に挟んで前記第１の層間と反対側に位置する層間に配置された、前記第２の共振電極に平行に近接配置されて電磁界結合する帯状の第１部分および前記第３の共振電極に平行に近接配置されて電磁界結合する帯状の第２部分ならびに前記第１および第２部分の一方端同士を接続する接続部からなり、１／２波長共振器として機能する第４の共振電極と、前記積層体の前記第１の層間と前記第２の層間との間に位置する層間に配置された、前記第１の共振電極の長さ方向の半分以上に渡る領域と対向して電磁界結合するとともに、電気信号が入力または出力される第１の入出力点を有する第１の入出力結合電極と、前記積層体の前記第１の層間と前記第２の層間との間に位置する層間に配置された、前記第１の複合共振電極における前記第１の突起部と対向して電磁界結合する第２の入出力結合電極と、前記積層体の前記第１の層間と前記第２の層間との間に位置する層間に配置された、前記第３の共振電極の長さ方向の半分以上に渡る領域と対向して電磁界結合するとともに、電気信号が入力または出力される第２の入出力点を有する第３の入出力結合電極と、前記積層体の前記第１の層間と前記第２の層間との間に位置する層間に配置された、前記第２の複合共振電極における前記第２の突起部と対向して電磁界結合する第４の入出力結合電極と、前記積層体の前記第２の層間を間に挟んで前記第１の層間と反対側に位置する層間に配置された、前記第１および第３の共振電極にそれぞれ対向して主に容量性の電磁界結合をする領域を有する共振電極結合導体とを備え、前記第１の共振電極の前記一方端と前記第２の共振電極の他方端とが同じ側に位置しており、前記第２の共振電極の前記一方端と前記第４の共振電極の前記第１部分の他方端とが同じ側に位置しており、前記第３の共振電極の前記一方端と前記第４の共振電極の前記第２部分の他方端とが同じ側に位置しており、前記第１の入出力点は、前記第１の入出力結合電極の長さ方向において、前記第１の共振電極との対向部の中央よりも前記第１の共振電極の前記一方端から遠い側に位置しており、前記第２の入出力点は、前記第３の入出力結合電極の長さ方向において、前記第３の共振電極との対向部の中央よりも前記第３の共振電極の前記一方端から遠い側に位置しており、前記第１乃至第３の共振電極と各々の前記複合共振電極における各々の前記突起部とは前記積層体の積層方向から見て互いに直交するように配置されており、前記第２の入出力結合電極は前記第１の入出力結合電極の前記第１の共振電極との対向部における長さ方向の中央よりも前記第１の入出力点から遠い側に接続されて前記第１の入出力結合電極を介して電気信号が入力または出力されるとともに、前記第４の入出力結合電極は前記第３の入出力結合電極の前記第３の共振電極との対向部における長さ方向の中央よりも前記第２の入出力点から遠い側に接続されて前記第３の入出力結合電極を介して電気信号が入力または出力され、通過特性において、前記第１乃至第４の共振電極によって形成される第１の通過帯域と、前記第１および第２の複合共振電極によって形成される第２の通過帯域とを有することを特徴とするものである。   The band-pass filter of the present invention includes a laminated body in which a plurality of dielectric layers are laminated, a ground electrode disposed on at least one of the upper surface and the lower surface of the laminated body, a base, and first and second strips. 1st and 2nd composite resonance electrode each comprised by the projection part, Comprising: One end of the said base is earth | grounded, The said 1st and 2nd projection part is the other end of the said base, and each one end is Connected side by side, the one end of the base becomes one end of each composite resonance electrode, the other end of the projection becomes the other end of each composite resonance electrode, and each of the composite resonance electrodes The base portion and the projection portion of the whole function as a resonator that resonates at a first frequency, and the projection portion of each composite resonance electrode has a second frequency higher than the first frequency. Both The one end of each of the composite resonance electrodes is located on the opposite side, and the second protrusion of the first composite resonance electrode and the first of the second composite resonance electrode And a second layer different from the first layer of the laminate, the first and second composite resonance electrodes arranged side by side between the first layer of the laminate so that the protrusions of the laminate are adjacent to each other The first to third resonance electrodes, which are arranged side by side and are grounded at one end and function as a quarter-wave resonator, and the first layer sandwiching the second layer therebetween, A band-shaped first portion that is disposed in parallel with the second resonance electrode and is electromagnetically coupled to the second resonance electrode disposed between layers opposite to the layer, and is disposed in parallel with the third resonance electrode to be electromagnetic. A band-like second portion that is field coupled and said first and second The first resonance electrode is formed between a first resonance layer and a second resonance layer, and a fourth resonance electrode that functions as a half-wavelength resonator. A first input / output point that is electromagnetically coupled to face a region extending between at least half of the lengths of the first resonance electrodes and disposed between the layers and to which an electric signal is input or output. The first input / output coupling electrode and the first protrusion of the first composite resonance electrode disposed between the first interlayer and the second interlayer of the laminate. And a length of the third resonance electrode disposed between the second input / output coupling electrode which is electromagnetically coupled and the layer between the first layer and the second layer of the multilayer body. Electromagnetic field coupling is performed in opposition to a region extending over half of the vertical direction, and an electric signal is input. Or a third input / output coupling electrode having a second input / output point to be output, and the interlayer disposed between the first layer and the second layer of the stacked body, A fourth input / output coupling electrode that is electromagnetically coupled to face the second protrusion in the second composite resonance electrode; and the first layer with the second layer of the laminate interposed therebetween A resonance electrode coupling conductor having a region for mainly capacitive electromagnetic coupling facing each of the first and third resonance electrodes and disposed between layers located on opposite sides, The one end of the resonance electrode and the other end of the second resonance electrode are located on the same side, and the other end of the first portion of the second resonance electrode and the first portion of the fourth resonance electrode The end is located on the same side, and the one end of the third resonance electrode and the front of the fourth resonance electrode The other end of the second portion is located on the same side, and the first input / output point is located in a length direction of the first input / output coupling electrode and is opposite to the first resonance electrode. The second input / output point is located farther from the one end of the first resonance electrode than the center, and the second input / output point is located in the length direction of the third input / output coupling electrode. Each of the protrusions of the first to third resonance electrodes and each of the composite resonance electrodes is located farther from the one end of the third resonance electrode than the center of the portion facing the electrode. Are arranged so as to be orthogonal to each other when viewed from the stacking direction of the stacked body, and the second input / output coupling electrode is at a portion of the first input / output coupling electrode facing the first resonance electrode. Connected to the side farther from the first input / output point than the center in the length direction, the first An electric signal is input or output through the input / output coupling electrode, and the fourth input / output coupling electrode is arranged in a length direction at a portion of the third input / output coupling electrode facing the third resonance electrode. An electrical signal is input or output via the third input / output coupling electrode connected to the side farther from the second input / output point than the center, and in the pass characteristic, the first to fourth resonance electrodes It has a first passband formed and a second passband formed by the first and second composite resonance electrodes.

また、本発明のバンドパスフィルタは、上記構成において、前記第２の入出力結合電極は前記積層体の積層方向から見て前記第１の共振電極の長さ方向の中央よりも前記一方端側と交わるように配置されており、前記第４の入出力結合電極は前記積層体の積層方向から見て前記第３の共振電極の長さ方向の中央よりも前記一方端側と交わるように配置されていることを特徴とするものである。   In the band-pass filter of the present invention, in the above configuration, the second input / output coupling electrode is on the one end side with respect to the center in the length direction of the first resonance electrode when viewed from the stacking direction of the stack. The fourth input / output coupling electrode is arranged so as to intersect the one end side with respect to the center in the length direction of the third resonance electrode when viewed from the lamination direction of the laminate. It is characterized by being.

本発明の無線通信モジュールは、上記各構成のいずれかの本発明のバンドパスフィルタを備えることを特徴とするものである。   A wireless communication module according to the present invention includes the band-pass filter according to the present invention having any one of the above-described configurations.

本発明の無線通信機器は、上記各構成のいずれかの本発明のバンドパスフィルタを含むＲＦ部と、該ＲＦ部に接続されたベースバンド部と、前記ＲＦ部に接続されたアンテナとを備えることを特徴とするものである。   A wireless communication device of the present invention includes an RF unit including the bandpass filter of the present invention having any one of the above-described configurations, a baseband unit connected to the RF unit, and an antenna connected to the RF unit. It is characterized by this.

本発明のバンドパスフィルタによれば、基部および突起部を合わせた全体が第１の周波数で共振する共振器として機能するとともに、突起部が第１の周波数よりも高い第２の周波数で共振する第１および第２の複合共振電極を用いて第２の通過帯域を形成する。これにより、第１および第２の周波数をある程度任意に設定することが可能である。このため、第２の通過帯域の広さを所望の値に設定することが容易なバンドパスフィルタを得ることができる。   According to the bandpass filter of the present invention, the whole of the base portion and the protrusion portion functions as a resonator that resonates at the first frequency, and the protrusion portion resonates at a second frequency higher than the first frequency. A first passband is formed using the first and second composite resonant electrodes. Thereby, the first and second frequencies can be arbitrarily set to some extent. For this reason, it is possible to obtain a bandpass filter that can easily set the width of the second passband to a desired value.

また、本発明のバンドパスフィルタは、一方端が接地されて１／４波長共振器として機能する第１乃至第３の共振電極と、第２の共振電極に平行に近接配置されて電磁界結合する第１部分および第３の共振電極に平行に近接配置されて電磁界結合する第２部分ならびに第１および第２部分の一方端同士を接続する接続部からなり、１／２波長共振器として機能する第４の共振電極と、第１および第３の共振電極にそれぞれ対向して主に容量性の電磁界結合をする領域を有する共振電極結合導体とを備えている。また、第１の共振電極の一方端と第２の共振電極の他方端とが同じ側に位置しており、第２の共振電極の一方端と第４の共振電極の第１部分の他方端とが同じ側に位置しており、第３の共振電極の一方端と第４の共振電極の第２部分の他方端とが同じ側に位置している。これにより、第１および第３の共振電極の間で、共振電極結合導体を介して伝達された電気信号と、隣り合う第１乃至第４の共振電極同士の電磁気的な結合によって伝達された電気信号との間に位相差が生じて互いに打ち消し合う現象を、通過帯域の両側近傍の周波数で生じさせることができる。このため、バンドパスフィルタの通過特性において、第１乃至第４の共振電極によって形成される第１の通過帯域の両側近傍において信号が殆ど伝達されない減衰極を形成することができる。   The band-pass filter according to the present invention includes first to third resonance electrodes that function as a quarter-wavelength resonator with one end grounded, and are disposed in close proximity to the second resonance electrode in an electromagnetic field coupling manner. The first part and the second resonance electrode arranged in parallel to each other and electromagnetically coupled to each other, and a connection part for connecting one ends of the first and second parts. A functioning fourth resonance electrode, and a resonance electrode coupling conductor having a region for mainly capacitive electromagnetic coupling facing each of the first and third resonance electrodes are provided. Further, one end of the first resonance electrode and the other end of the second resonance electrode are located on the same side, and one end of the second resonance electrode and the other end of the first portion of the fourth resonance electrode. Are located on the same side, and one end of the third resonance electrode and the other end of the second portion of the fourth resonance electrode are located on the same side. As a result, the electrical signal transmitted between the first and third resonant electrodes via the resonant electrode coupling conductor and the electrical signal transmitted by the electromagnetic coupling between the adjacent first to fourth resonant electrodes. A phenomenon in which a phase difference occurs between signals and cancels each other can be generated at frequencies near both sides of the passband. For this reason, in the pass characteristics of the bandpass filter, it is possible to form an attenuation pole that hardly transmits a signal in the vicinity of both sides of the first passband formed by the first to fourth resonance electrodes.

さらに、本発明のバンドパスフィルタによれば、第１乃至第３の共振電極と各々の複合共振電極における各々の突起部とは積層体の積層方向から見て互いに直交するように配置されている。これにより、積層体の厚みが薄くて第１乃至第４の共振電極と第１および第２の複合共振電極が近接する場合においても、第１乃至第４の共振電極と第１および第２の複合共振電極における突起部との間に生じる電磁界結合を最小限にすることができる。このため、第１乃至第４の共振電極と第１および第２の複合共振電極とが強く電磁界結合することによって生じる通過特性の悪化を防止することができる。   Furthermore, according to the band-pass filter of the present invention, the first to third resonance electrodes and the protrusions of the composite resonance electrodes are disposed so as to be orthogonal to each other when viewed from the stacking direction of the stacked body. . Thereby, even when the thickness of the laminated body is thin and the first to fourth resonance electrodes and the first and second composite resonance electrodes are close to each other, the first to fourth resonance electrodes and the first and second resonance electrodes Electromagnetic field coupling generated between the protrusions in the composite resonance electrode can be minimized. For this reason, it is possible to prevent the deterioration of pass characteristics caused by strong electromagnetic coupling between the first to fourth resonance electrodes and the first and second composite resonance electrodes.

またさらに、本発明のバンドパスフィルタによれば、第２の入出力結合電極は、第１の入出力結合電極の第１の共振電極との対向部における長さ方向の中央よりも第１の入出力点から遠い側に接続されて、第１の入出力結合電極を介して電気信号が入力または出力される。また、第４の入出力結合電極は、第３の入出力結合電極の第３の共振電極との対向部における長さ方向の中央よりも第２の入出力点から遠い側に接続されて、第３の入出力結合電極を介して電気信号が入力または出力される。これにより、第１の入出力結合電極と第１の共振電極との電磁界結合を強くすることができるとともに、第３の入出力結合電極と第３の共振電極との電磁界結合を強めることができるので、第１乃至第４の共振電極によって形成される第１の通過帯域を、広い通過帯域の全体に渡って平坦で低損失なものにすることができる。   Still further, according to the bandpass filter of the present invention, the second input / output coupling electrode has a first length greater than the center in the length direction at the portion of the first input / output coupling electrode facing the first resonance electrode. An electrical signal is input or output via the first input / output coupling electrode connected to the side far from the input / output point. Further, the fourth input / output coupling electrode is connected to a side farther from the second input / output point than the center in the length direction in the portion of the third input / output coupling electrode facing the third resonance electrode, An electrical signal is input or output via the third input / output coupling electrode. As a result, the electromagnetic coupling between the first input / output coupling electrode and the first resonant electrode can be strengthened, and the electromagnetic coupling between the third input / output coupling electrode and the third resonant electrode can be strengthened. Therefore, the first passband formed by the first to fourth resonance electrodes can be made flat and low-loss over the entire wide passband.

さらにまた、本発明のバンドパスフィルタによれば、第２の入出力結合電極は積層体の積層方向から見て第１の共振電極の長さ方向の中央よりも一方端側と交わるように配置されており、第４の入出力結合電極は積層体の積層方向から見て第３の共振電極の長さ方向の中央よりも一方端側と交わるように配置されているときには、第２の入出力結合電極と第１の共振電極との間の電界による結合を小さくするとともに、第４の入出力結合電極と第３の共振電極との電界による結合を小さくすることができるので、第２の入出力結合電極と第１の共振電極との電界による結合および第４の入出力結合電極と第３の共振電極との電界による結合が大きくなることに起因するフィルタ特性の悪化を防止することができる。   Furthermore, according to the band-pass filter of the present invention, the second input / output coupling electrode is arranged so as to intersect one end side from the center in the length direction of the first resonance electrode when viewed from the stacking direction of the stacked body. When the fourth input / output coupling electrode is arranged so as to cross one end side from the center in the length direction of the third resonance electrode when viewed from the stacking direction of the stacked body, Since the coupling due to the electric field between the output coupling electrode and the first resonance electrode can be reduced, and the coupling due to the electric field between the fourth input / output coupling electrode and the third resonance electrode can be reduced, the second It is possible to prevent deterioration of filter characteristics due to an increase in coupling between the input / output coupling electrode and the first resonance electrode due to an electric field and coupling between the fourth input / output coupling electrode and the third resonance electrode due to an electric field. it can.

本発明の無線通信モジュールおよび本発明の無線通信機器によれば、２つの広い通過帯域の全域に渡って通過する信号の損失が小さく、且つ２つの通過帯域の間に形成された減衰極によって減衰量が充分に確保された本発明のバンドパスフィルタを通信信号の濾波に用いることにより、バンドパスフィルタを通過する通信信号の減衰が少なくなるとともにノイズも減少する。このため、受信感度が向上するとともに通信信号の増幅度を小さくできるため増幅回路における消費電力が少なくなる。さらに、本発明のバンドパスフィルタで２つの通信帯域の信号を濾波することができる。よって、小型で受信感度が高く消費電力が少ない高性能な無線通信モジュールおよび無線通信機器を得ることができる。   According to the wireless communication module of the present invention and the wireless communication device of the present invention, the loss of the signal passing over the entire area of the two wide passbands is small, and the attenuation is formed by the attenuation pole formed between the two passbands. By using the band-pass filter of the present invention with a sufficient amount for filtering the communication signal, the attenuation of the communication signal passing through the band-pass filter is reduced and the noise is also reduced. For this reason, the reception sensitivity is improved and the amplification degree of the communication signal can be reduced, so that the power consumption in the amplifier circuit is reduced. Furthermore, signals of two communication bands can be filtered with the band-pass filter of the present invention. Therefore, it is possible to obtain a high-performance wireless communication module and wireless communication device that are small in size, have high reception sensitivity, and consume less power.

本発明の実施の形態の第１の例のバンドパスフィルタを模式的に示す外観斜視図である。It is an external appearance perspective view which shows typically the band pass filter of the 1st example of embodiment of this invention. 図１に示すバンドパスフィルタの模式的な分解斜視図である。It is a typical exploded perspective view of the band pass filter shown in FIG. 図１に示すバンドパスフィルタの上下面および層間を模式的に示す平面図である。It is a top view which shows typically the upper and lower surfaces and interlayer of a band pass filter shown in FIG. 図１のＰ−Ｐ’線断面図である。FIG. 2 is a cross-sectional view taken along line P-P ′ in FIG. 1. 本発明の実施の形態の第２の例のバンドパスフィルタを模式的に示す外観斜視図である。It is an external appearance perspective view which shows typically the band pass filter of the 2nd example of embodiment of this invention. 図５に示すバンドパスフィルタの模式的な分解斜視図である。FIG. 6 is a schematic exploded perspective view of the bandpass filter shown in FIG. 5. 図５に示すバンドパスフィルタの上下面および層間を模式的に示す平面図である。It is a top view which shows typically the upper and lower surfaces and interlayer of a band pass filter shown in FIG. 図５のＱ−Ｑ’線断面図である。FIG. 6 is a cross-sectional view taken along the line Q-Q ′ of FIG. 5. 本発明の実施の形態の第３の例のバンドパスフィルタを模式的に示す外観斜視図である。It is an external appearance perspective view which shows typically the band pass filter of the 3rd example of embodiment of this invention. 図９に示すバンドパスフィルタの模式的な分解斜視図である。FIG. 10 is a schematic exploded perspective view of the bandpass filter shown in FIG. 9. 図９に示すバンドパスフィルタの上下面および層間を模式的に示す平面図である。FIG. 10 is a plan view schematically showing upper and lower surfaces and layers of the bandpass filter shown in FIG. 9. 図９のＲ−Ｒ’線断面図である。FIG. 10 is a cross-sectional view taken along line R-R ′ in FIG. 9. 本発明の実施の形態の第４の例の無線通信モジュールおよび無線通信機器を模式的に示すブロック図である。It is a block diagram which shows typically the radio | wireless communication module and radio | wireless communication apparatus of the 4th example of embodiment of this invention. 本発明の実施の形態の第３の例のバンドパスフィルタの電気特性のシミュレーション結果を示す図である。It is a figure which shows the simulation result of the electrical property of the bandpass filter of the 3rd example of embodiment of this invention.

以下、本発明のバンドパスフィルタを添付の図面を参照しつつ詳細に説明する。
（実施の形態の第１の例）
図１は、本発明の実施の形態の第１の例のバンドパスフィルタを模式的に示す外観斜視図である。図２は、図１に示すバンドパスフィルタの模式的な分解斜視図である。図３は、図１に示すバンドパスフィルタの上下面および層間を模式的に示す平面図である。図４は、図１のＰ−Ｐ’線断面図である。 Hereinafter, a bandpass filter of the present invention will be described in detail with reference to the accompanying drawings.
(First example of embodiment)
FIG. 1 is an external perspective view schematically showing a band-pass filter of a first example of an embodiment of the present invention. FIG. 2 is a schematic exploded perspective view of the bandpass filter shown in FIG. FIG. 3 is a plan view schematically showing the upper and lower surfaces and the layers of the bandpass filter shown in FIG. 4 is a cross-sectional view taken along the line PP ′ of FIG.

本例のバンドパスフィルタは、図１〜図４に示すように、積層体10と、第１の接地電極21と、第２の接地電極22と、第１の環状接地電極23と、第２の環状接地電極24と、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄと、第１および第２の複合共振電極29ａ，29ｂと、第１および第２の入出力結合電極40ａ，41ａと、第３および第４の入出力結合電極40ｂ，41ｂと、共振電極結合導体35と第１の入出力端子電極60ａと、第２の入出力端子電極60ｂとを備えている。   As shown in FIGS. 1 to 4, the band-pass filter of this example includes a laminate 10, a first ground electrode 21, a second ground electrode 22, a first annular ground electrode 23, and a second Annular ground electrode 24, first to fourth resonance electrodes 30a, 30b, 30c and 30d, first and second composite resonance electrodes 29a and 29b, and first and second input / output coupling electrodes 40a, 41a, third and fourth input / output coupling electrodes 40b and 41b, a resonance electrode coupling conductor 35, a first input / output terminal electrode 60a, and a second input / output terminal electrode 60b are provided.

積層体10は、複数の誘電体層11が積層されてなる。第１の接地電極21は、積層体10の下面に配置されている。第２の接地電極22は、積層体10の上面に配置されている。第１の環状接地電極23は、積層体10の第１の層間に、第１および第２の複合共振電極29ａ，29ｂの周囲を囲むように配置されている。第２の環状接地電極24は、積層体10の第２の層間に、第１乃至第３の共振電極30ａ，30ｂ，30ｃの周囲を囲むように配置されている。   The laminate 10 is formed by laminating a plurality of dielectric layers 11. The first ground electrode 21 is disposed on the lower surface of the multilayer body 10. The second ground electrode 22 is disposed on the upper surface of the multilayer body 10. The first annular ground electrode 23 is disposed between the first layers of the laminate 10 so as to surround the first and second composite resonance electrodes 29a and 29b. The second annular ground electrode 24 is disposed between the second layers of the multilayer body 10 so as to surround the first to third resonance electrodes 30a, 30b, 30c.

第１および第２の複合共振電極29ａ，29ｂは、積層体10の第１の層間に配置されており、基部27ならびに帯状の第１および第２の突起部28ａ，28ｂによってそれぞれ構成されている。基部27の一方端は第１の環状接地電極23に接続されており、第１の環状接地電極23を介して接地される。第１および第２の突起部28ａ，28ｂは基部27の他方端に各々の一方端が接続されて横並びに配置されている。よって、基部27の一方端が各々の複合共振電極29ａ，29ｂの一方端となり、第１および第２の突起部28ａ，28ｂの他方端が各々の複合共振電極29ａ，29ｂの他方端となっている。そして、各々の複合共振電極29ａ，29ｂの一方端が接地されることにより、基部27ならびに第１および第２の突起部28ａ，28ｂを合わせた全体が第１の周波数で共振する共振器として機能するとともに、各々の突起部28ａ，28ｂが第１の周波数よりも高い第２の周波数で共振する共振器として機能する。このような第１および第２の複合共振電極29ａ，29ｂは、各々の一方端が逆側に位置するとともに、第１の複合共振電極29ａの第２の突起部28ｂと第２の複合共振電極29ｂの第１の突起部28ａとが隣接するように横並びに配置されている。   The first and second composite resonance electrodes 29a and 29b are arranged between the first layers of the multilayer body 10, and are constituted by a base 27 and strip-shaped first and second protrusions 28a and 28b, respectively. . One end of the base 27 is connected to the first annular ground electrode 23 and is grounded via the first annular ground electrode 23. The first and second protrusions 28 a and 28 b are arranged side by side with one end connected to the other end of the base 27. Therefore, one end of the base portion 27 becomes one end of each composite resonance electrode 29a, 29b, and the other end of each of the first and second protrusions 28a, 28b becomes the other end of each composite resonance electrode 29a, 29b. Yes. Then, one end of each of the composite resonance electrodes 29a and 29b is grounded, so that the whole of the base 27 and the first and second protrusions 28a and 28b functions as a resonator that resonates at the first frequency. In addition, each of the protrusions 28a and 28b functions as a resonator that resonates at a second frequency higher than the first frequency. The first and second composite resonance electrodes 29a and 29b have one end located on the opposite side, and the second protrusion 28b and the second composite resonance electrode of the first composite resonance electrode 29a. The first protrusions 28a of 29b are arranged side by side so as to be adjacent to each other.

第１乃至第３の共振電極30ａ，30ｂ，30ｃは、積層体10の第２の層間に横並びに順次配置されている。第１乃至第３の共振電極30ａ，30ｂ，30ｃの一方端は第２の環状接地電極24に接続されており、第２の環状接地電極24を介して接地されることにより１／４波長共振器として機能する。   The first to third resonance electrodes 30 a, 30 b, 30 c are sequentially arranged side by side between the second layers of the multilayer body 10. One end of each of the first to third resonance electrodes 30a, 30b, 30c is connected to the second annular ground electrode 24, and is grounded via the second annular ground electrode 24 so that 1/4 wavelength resonance occurs. It functions as a vessel.

第４の共振電極30ｄは、第２の層間を間に挟んで第１の層間と反対側に位置する層間Ａに配置されている。また、第４の共振電極30ｄは、第２の共振電極30ｂに平行に近接配置されて電磁界結合する帯状の第１部分30ｄ１と、第３の共振電極30ｃに平行に近接配置されて電磁界結合する帯状の第２部分30ｄ２と、第１および第２部分30ｄ１，30ｄ２の一方端同士を接続する接続部30ｄ３とからなる。第４の共振電極30ｄの両端は開放端となっており１／２波長共振器として機能する。   The fourth resonant electrode 30d is disposed in the interlayer A located on the opposite side of the first interlayer with the second interlayer interposed therebetween. The fourth resonance electrode 30d is disposed in parallel with the second resonance electrode 30b in close proximity to the band-shaped first portion 30d1 and is electromagnetically coupled to the third resonance electrode 30c. A band-shaped second portion 30d2 to be coupled and a connection portion 30d3 that connects one ends of the first and second portions 30d1 and 30d2 are formed. Both ends of the fourth resonance electrode 30d are open ends and function as a half-wave resonator.

第１の入出力結合電極40ａは、積層体10の第１の層間と第２の層間との間に位置する層間Ｂに配置されており、第１の共振電極30ａの長さ方向の半分以上に渡る領域と対向して電磁界結合する。また、第１の入出力結合電極40ａは、積層体10の上面に配置された第１の入出力端子電極60ａに貫通導体50を介して接続されている。この第１の入出力結合電極40ａと貫通導体50との接続点は、第１の入出力結合電極40ａにおいて電気信号が入力または出力される点である第１の入出力点45ａとなっている。   The first input / output coupling electrode 40a is disposed in an interlayer B located between the first interlayer and the second interlayer of the stacked body 10, and more than half the length of the first resonance electrode 30a. Electromagnetic field coupling is performed in opposition to the region extending over. The first input / output coupling electrode 40 a is connected to the first input / output terminal electrode 60 a disposed on the upper surface of the multilayer body 10 through the through conductor 50. A connection point between the first input / output coupling electrode 40a and the through conductor 50 is a first input / output point 45a, which is a point where an electric signal is input to or output from the first input / output coupling electrode 40a. .

第２の入出力結合電極41ａは、積層体10の層間Ｂに、第１の複合共振電極29ａにおける第１の突起部28ａと平行に対向して電磁界結合するように配置されている。また、第２の入出力結合電極41ａの一方端は第１の入出力結合電極40ａに接続されており、第２の入出力結合電極41ａの他方端は、第１の複合共振電極29ａの第１の突起部28ａの他方端と反対側に位置している。   The second input / output coupling electrode 41a is disposed in the layer B of the multilayer body 10 so as to be electromagnetically coupled so as to face the first protrusion 28a in the first composite resonance electrode 29a in parallel. Further, one end of the second input / output coupling electrode 41a is connected to the first input / output coupling electrode 40a, and the other end of the second input / output coupling electrode 41a is the first end of the first composite resonance electrode 29a. It is located on the opposite side to the other end of the one projection 28a.

第３の入出力結合電極40ｂは、積層体10の層間Ｂに配置されており、第３の共振電極30ｃの長さ方向の半分以上に渡る領域と対向して電磁界結合する。また、第３の入出力結合電極40ｂは、積層体10の上面に配置された第２の入出力端子電極60ｂに貫通導体50を介して接続されている。この第３の入出力結合電極40ｂと貫通導体50との接続点は、第３の入出力結合電極40ｂにおいて電気信号が入力または出力される点である第２の入出力点45ｂとなっている。   The third input / output coupling electrode 40b is disposed between the layers B of the stacked body 10, and is electromagnetically coupled so as to face a region extending over half of the length direction of the third resonance electrode 30c. The third input / output coupling electrode 40b is connected to the second input / output terminal electrode 60b disposed on the upper surface of the multilayer body 10 through the through conductor 50. The connection point between the third input / output coupling electrode 40b and the through conductor 50 is a second input / output point 45b, which is a point where an electric signal is input to or output from the third input / output coupling electrode 40b. .

第４の入出力結合電極41ｂは、積層体10の層間Ｂに、第２の複合共振電極29ｂにおける第２の突起部28ｂと平行に対向して電磁界結合するように配置されている。また、第４の入出力結合電極41ｂの一方端は第３の入出力結合電極40ｂに接続されており、第４の入出力結合電極41ｂの他方端は、第２の複合共振電極29ｂの第１の突起部28ａの他方端と反対側に位置している。   The fourth input / output coupling electrode 41b is disposed in the layer B of the multilayer body 10 so as to be electromagnetically coupled so as to face the second projecting portion 28b of the second composite resonance electrode 29b in parallel. One end of the fourth input / output coupling electrode 41b is connected to the third input / output coupling electrode 40b, and the other end of the fourth input / output coupling electrode 41b is the second end of the second composite resonance electrode 29b. It is located on the opposite side to the other end of the one projection 28a.

共振電極結合導体35は、積層体10の第２の層間を間に挟んで第１の層間と反対側に位置する層間Ｃに配置されており、第１の共振電極30ａに対向して主に容量性の電磁界結合をする第１の結合部35ａと、第３の共振電極30ｃに対向して主に容量性の電磁界結合をする第２の結合部35ｂと、第１の結合部35ａ及び第２の結合部35ｂを接続する接続部35ｃとによって構成されている。   The resonant electrode coupling conductor 35 is disposed in an interlayer C located on the opposite side of the first interlayer with the second interlayer of the multilayer body 10 interposed therebetween, and mainly opposed to the first resonant electrode 30a. A first coupling portion 35a that performs capacitive electromagnetic field coupling, a second coupling portion 35b that mainly performs capacitive electromagnetic field coupling opposite to the third resonance electrode 30c, and a first coupling portion 35a. And a connecting portion 35c for connecting the second coupling portion 35b.

このような構成を備える本例のバンドパスフィルタは、例えば、第１の入出力端子電極60ａおよび貫通導体50を介して第１の入出力結合電極40ａの第１の入出力点45ａに外部回路からの電気信号が入力されると、第１の入出力結合電極40ａと電磁界結合する第１の共振電極30ａが励振されることによって、相互に電磁界結合する第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄが共振し、第４の共振電極30ｄと電磁界結合する第２の入出力結合電極40ｂの第２の入出力点45ｂから貫通導体50および第２の入出力端子電極60ｂを介して外部回路に電気信号が出力される。このとき、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄが共振する周波数を含む周波数帯域の信号が選択的に通過するため、これによって、第１の通過帯域が形成される。   The band-pass filter of this example having such a configuration has an external circuit connected to the first input / output point 45a of the first input / output coupling electrode 40a via the first input / output terminal electrode 60a and the through conductor 50, for example. When the electric signal from the first input electrode is input, the first resonance electrode 30a electromagnetically coupled to the first input / output coupling electrode 40a is excited, whereby the first to fourth resonance electrodes that are electromagnetically coupled to each other are excited. The through conductor 50 and the second input / output terminal electrode from the second input / output point 45b of the second input / output coupling electrode 40b in which 30a, 30b, 30c, 30d resonate and electromagnetically couple with the fourth resonant electrode 30d. An electrical signal is output to an external circuit via 60b. At this time, a signal in a frequency band including a frequency at which the first to fourth resonance electrodes 30a, 30b, 30c, and 30d resonate selectively passes, thereby forming a first pass band.

また、第１の入出力端子電極60ａおよび貫通導体50を介して第１の入出力結合電極40ａの第１の入出力点45ａに外部回路からの電気信号が入力されると、第１の入出力結合電極40ａに接続された第２の入出力結合電極41ａと電磁界結合する第１の複合共振電極29ａが励振されることによって相互に電磁界結合する第１および第２の複合共振電極29ａ，29ｂが共振し、第２の複合共振電極29ｂと電磁界結合する第４の入出力結合電極41ｂが接続された第３の入出力結合電極40ｂの第２の入出力点45ｂから貫通導体50および第２の入出力端子電極60ｂを介して外部回路に電気信号が出力される。このとき、第１および第２の複合共振電極29ａ，29ｂが共振する周波数を含む周波数帯域の信号が選択的に通過するため、これによって、第２の通過帯域が形成される。   Further, when an electric signal from an external circuit is input to the first input / output point 45a of the first input / output coupling electrode 40a via the first input / output terminal electrode 60a and the through conductor 50, the first input The first and second composite resonance electrodes 29a electromagnetically coupled to each other when the first composite resonance electrode 29a electromagnetically coupled to the second input / output coupling electrode 41a connected to the output coupling electrode 40a is excited. 29b resonate, and the through conductor 50 extends from the second input / output point 45b of the third input / output coupling electrode 40b to which the fourth input / output coupling electrode 41b electromagnetically coupled to the second composite resonance electrode 29b is connected. An electric signal is output to an external circuit through the second input / output terminal electrode 60b. At this time, a signal in a frequency band including a frequency at which the first and second composite resonance electrodes 29a and 29b resonate selectively passes, so that a second pass band is formed.

このようにして、本例のバンドパスフィルタは、周波数の異なる２つの通過帯域を有するバンドパスフィルタとして機能する。   In this way, the bandpass filter of this example functions as a bandpass filter having two passbands having different frequencies.

このような構成を備える本例のバンドパスフィルタによれば、基部27ならびに第１および第２の突起部28ａ，28ｂを合わせた全体が第１の周波数で共振する共振器として機能するとともに、第１および第２の突起部28ａ，28ｂが第１の周波数よりも高い第２の周波数で共振する複合共振電極29ａ，29ｂを用いて第２の通過帯域を形成する。これにより、第１および第２の周波数をある程度任意に設定することが可能である。このため、第１および第２の複合共振電極29ａ，29ｂによって形成する第２の通過帯域の広さを所望の値に設定することが容易なバンドパスフィルタを得ることができる。   According to the bandpass filter of this example having such a configuration, the base 27 and the whole of the first and second protrusions 28a and 28b function as a resonator that resonates at the first frequency, and the first The first and second protrusions 28a and 28b form a second passband using the composite resonance electrodes 29a and 29b that resonate at a second frequency higher than the first frequency. Thereby, the first and second frequencies can be arbitrarily set to some extent. Therefore, it is possible to obtain a band-pass filter in which the width of the second pass band formed by the first and second composite resonance electrodes 29a and 29b can be easily set to a desired value.

また、本例のバンドパスフィルタによれば、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄは、隣接する共振器同士が互いにインターデジタル型に配置されて主に容量性の電磁界結合をしている。また、第１乃至第３の共振電極30ａ，30ｂ，30ｃは１／４波長共振器として機能しており、第４の共振電極30ｄは１／２波長共振器として機能している。さらに、共振電極結合導体35は、第１の共振電極30ａおよび第３の共振電極30ｃと主に容量性の電磁界結合をしている。このような構成により、第１の共振電極30ａと第３の共振電極との間で、共振電極結合導体35を介して伝達された電気信号と、隣り合う第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄ同士の電磁気的な結合によって伝達された電気信号との間に位相差が生じて互いに打ち消し合う現象を、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄによって形成される通過帯域の両側近傍の周波数で生じさせることができる。このため、バンドパスフィルタの通過特性において、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄによって形成される第１の通過帯域の両側近傍に、信号が殆ど伝達されない減衰極を形成することができる。   Further, according to the bandpass filter of this example, the first to fourth resonance electrodes 30a, 30b, 30c, 30d are mainly capacitive electromagnetic fields in which adjacent resonators are arranged in an interdigital manner. Have a bond. The first to third resonance electrodes 30a, 30b, 30c function as a quarter wavelength resonator, and the fourth resonance electrode 30d functions as a half wavelength resonator. Further, the resonance electrode coupling conductor 35 is mainly capacitively electromagnetically coupled to the first resonance electrode 30a and the third resonance electrode 30c. With such a configuration, the electrical signal transmitted through the resonant electrode coupling conductor 35 between the first resonant electrode 30a and the third resonant electrode and the adjacent first to fourth resonant electrodes 30a, The first to fourth resonance electrodes 30a, 30b, 30c, and 30d form a phenomenon in which a phase difference occurs between the electrical signals transmitted by electromagnetic coupling between 30b, 30c, and 30d and cancel each other. Can occur at frequencies near both sides of the passband. Therefore, in the pass characteristics of the band pass filter, attenuation poles that hardly transmit signals are formed near both sides of the first pass band formed by the first to fourth resonance electrodes 30a, 30b, 30c, and 30d. be able to.

さらに、本例のバンドパスフィルタによれば、第１乃至第３の共振電極30ａ，30ｂ，30ｃならびに第４の共振電極30ｄの第１部分30ｄ１および第２部分30ｄ２ならびに第１および第２の入出力結合電極40ａ，41ａは、第１および第２の複合共振電極29ａ，29ｂにおける第１および第２の突起部28ａ，28ｂに跨って対向するように配置されている。これにより、複数のルートで伝達された電気信号同士が互いの位相差によって打ち消し合う現象を、第１および第２の複合共振電極29ａ，29ｂによって形成される第２の通過帯域の両側近傍の周波数で生じさせることができる。このため、バンドパスフィルタの通過特性において、第１および第２の複合共振電極29ａ，29ｂによって形成される第２の通過帯域の両側近傍に、信号が殆ど伝達されない減衰極を形成することができる。   Further, according to the bandpass filter of the present example, the first to third resonance electrodes 30a, 30b, 30c, the first portion 30d1 and the second portion 30d2 of the fourth resonance electrode 30d, and the first and second input electrodes. The output coupling electrodes 40a and 41a are disposed so as to face each other across the first and second protrusions 28a and 28b in the first and second composite resonance electrodes 29a and 29b. As a result, the phenomenon in which electrical signals transmitted through a plurality of routes cancel each other due to the phase difference between them is a frequency near both sides of the second passband formed by the first and second composite resonance electrodes 29a and 29b. Can be generated. For this reason, in the pass characteristic of the band pass filter, an attenuation pole that hardly transmits a signal can be formed near both sides of the second pass band formed by the first and second composite resonance electrodes 29a and 29b. .

またさらに、本例のバンドパスフィルタによれば、第１および第２の入出力結合電極40ａ，41ａと第３および第４の入出力結合電極40ｂ，41ｂとの間に、第１の通過帯域を形成する第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄと第２の通過帯域を形成する第１および第２の複合共振電極29ａ，29ｂとが電気的に並列に接続されている。また、第１および第２の複合共振電極29ａ，29ｂにおいて、隣り合う共振電極同士はインターデジタル型の電磁界結合によって主に容量性の結合をしている。さらに、第１および第３の入出力結合電極40ａ，40ｂは第１および第３の共振電極30ａ，30ｃとインターデジタル型の電磁界結合によって主に容量性の結合をしており、第２の入出力結合電極41ａは第１の複合共振電極29ａの第１の突起部28ａとインターデジタル型の電磁界結合によって主に容量性の結合をしており、第４の入出力結合電極41ｂは第２の複合共振電極29ｂの第２の突起部28ｂとインターデジタル型の電磁界結合によって主に容量性の結合をしている。またさらに、第１乃至第３の共振電極30ａ，30ｂ，30ｃならびに第１および第２の複合共振電極29ａ，29ｂは１／４波長共振器として機能し、第４の共振器は１／２波長共振器として機能する。このような構成により、複数のルートで伝達された電気信号同士が互いの位相差によって打ち消し合う現象を、前述した第１の通過帯域の高周波側近傍の減衰極と、前述した第２の通過帯域の低周波側近傍の減衰極との間に位置する周波数領域において生じさせることができる。このため、バンドパスフィルタの通過特性において、第１の通過帯域の高周波側近傍の減衰極と、第２の通過帯域の低周波側近傍の減衰極との間に位置する周波数領域に、信号が殆ど伝達されない減衰極を形成することができる。   Furthermore, according to the band-pass filter of this example, the first passband is provided between the first and second input / output coupling electrodes 40a and 41a and the third and fourth input / output coupling electrodes 40b and 41b. The first to fourth resonance electrodes 30a, 30b, 30c, 30d forming the first and second composite resonance electrodes 29a, 29b forming the second passband are electrically connected in parallel. . In the first and second composite resonance electrodes 29a and 29b, adjacent resonance electrodes are mainly capacitively coupled by interdigital electromagnetic field coupling. Further, the first and third input / output coupling electrodes 40a, 40b are mainly capacitively coupled to the first and third resonance electrodes 30a, 30c by interdigital electromagnetic field coupling, and the second The input / output coupling electrode 41a is mainly capacitively coupled to the first protrusion 28a of the first composite resonance electrode 29a by interdigital electromagnetic field coupling, and the fourth input / output coupling electrode 41b is the second input / output coupling electrode 41b. The second projecting portion 28b of the second composite resonance electrode 29b is mainly capacitively coupled by interdigital electromagnetic field coupling. Furthermore, the first to third resonance electrodes 30a, 30b, 30c and the first and second composite resonance electrodes 29a, 29b function as a quarter wavelength resonator, and the fourth resonator has a half wavelength. Functions as a resonator. With such a configuration, the phenomenon in which electrical signals transmitted through a plurality of routes cancel each other due to the phase difference between each other is described as follows. The attenuation pole near the high frequency side of the first passband described above and the second passband described above. Can be generated in a frequency region located between the attenuation poles in the vicinity of the low frequency side. Therefore, in the pass characteristic of the bandpass filter, a signal is present in a frequency region located between the attenuation pole near the high frequency side of the first passband and the attenuation pole near the low frequency side of the second passband. An attenuation pole that is hardly transmitted can be formed.

よって、本例のバンドパスフィルタによれば、通過特性において、第１の通過帯域と第２の通過帯域との間に位置する周波数領域に３つの減衰極を形成することができるので、第１の通過帯域と第２の通過帯域との間における減衰量が確保された良好な通過特性を有するバンドパスフィルタを得ることができる。   Therefore, according to the bandpass filter of this example, in the pass characteristic, three attenuation poles can be formed in the frequency region located between the first passband and the second passband. A bandpass filter having good pass characteristics in which an attenuation amount between the passband and the second passband is ensured can be obtained.

また、本例のバンドパスフィルタによれば、第１乃至第３の共振電極30ａ，30ｂ，30ｃならびに第４の共振電極30ｄの第１部分30ｄ１および第２部分30ｄ２と各々の複合共振電極29ａ，29ｂにおける各々の突起部28ａ，28ｂとは、積層体10の積層方向から見て互いに直交するように配置されている。これにより、積層体10の厚みが薄くて第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄと第１および第２の複合共振電極29ａ，29ｂが近接する場合においても、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄと第１および第２の複合共振電極29ａ，29ｂにおける各々の突起部28ａ，28ｂとの間に生じる電磁界結合を最小限にすることができる。このため、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄと第１および第２の複合共振電極29ａ，29ｂとが強く電磁界結合することによって生じる通過特性の悪化を防止することができる。   Further, according to the bandpass filter of this example, the first to third resonance electrodes 30a, 30b, 30c, the first portion 30d1 and the second portion 30d2 of the fourth resonance electrode 30d, and the respective composite resonance electrodes 29a, The protrusions 28a and 28b in 29b are arranged so as to be orthogonal to each other when viewed from the stacking direction of the stacked body 10. Thus, even when the thickness of the multilayer body 10 is thin and the first to fourth resonance electrodes 30a, 30b, 30c, 30d and the first and second composite resonance electrodes 29a, 29b are close to each other, the first to the first resonance electrodes 30a, 30b, 30c, 30d are close to each other. Electromagnetic field coupling generated between the four resonance electrodes 30a, 30b, 30c, 30d and the respective projections 28a, 28b of the first and second composite resonance electrodes 29a, 29b can be minimized. For this reason, it is possible to prevent the deterioration of pass characteristics caused by strong electromagnetic coupling between the first to fourth resonance electrodes 30a, 30b, 30c, 30d and the first and second composite resonance electrodes 29a, 29b. it can.

さらに、本例のバンドパスフィルタによれば、第２の入出力結合電極41ａは、第１の入出力結合電極40ａの第１の共振電極30ａとの対向部における長さ方向の中央よりも第１の入出力点45ａから遠い側に接続されて、第１の入出力結合電極40ａを介して電気信号が入力または出力される。また、第４の入出力結合電極41ｂは、第３の入出力結合電極40ｂの第３の共振電極30ｃとの対向部における長さ方向の中央よりも第２の入出力点45ｂから遠い側に接続されて、第３の入出力結合電極40ｂを介して電気信号が入力または出力される。これにより、第１の入出力結合電極40ａと第１の共振電極30ａとの電磁界結合を強くすることができるとともに、第３の入出力結合電極40ｂと第３の共振電極30ｃとの電磁界結合を強くすることができるので、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄによって形成される第１の通過帯域を、広い通過帯域の全体に渡って平坦で低損失なものにすることができる。   Furthermore, according to the bandpass filter of the present example, the second input / output coupling electrode 41a has a first length greater than the center in the length direction at the portion of the first input / output coupling electrode 40a facing the first resonance electrode 30a. 1 is connected to a side far from the input / output point 45a, and an electric signal is input or output through the first input / output coupling electrode 40a. The fourth input / output coupling electrode 41b is located farther from the second input / output point 45b than the center in the length direction at the portion of the third input / output coupling electrode 40b facing the third resonance electrode 30c. Connected and an electric signal is input or output via the third input / output coupling electrode 40b. Thereby, the electromagnetic coupling between the first input / output coupling electrode 40a and the first resonance electrode 30a can be strengthened, and the electromagnetic field between the third input / output coupling electrode 40b and the third resonance electrode 30c. Since the coupling can be strengthened, the first passband formed by the first to fourth resonance electrodes 30a, 30b, 30c, and 30d is flat and has low loss over the entire wide passband. can do.

この効果は、発明者が種々の検討によって見出したものであるが、この効果が得られる理由は、第１の入出力点45ａが第１の入出力結合電極40ａと第２の入出力結合電極41ａとの分岐点にある場合と比較して、第１の入力結合電極の第１の共振電極30ａとの対向部を流れる電流を多くできるとともに、第２の入出力点45ｂが第３の入出力結合電極40ｂと第４の入出力結合電極41ｂとの分岐点にある場合と比較して、第３の入出力結合電極40ｂの第３の共振電極30ｃとの対向部を流れる電流を多くできるためではないかと考えられる。   This effect has been found by the inventors through various studies. The reason why this effect is obtained is that the first input / output point 45a is connected to the first input / output coupling electrode 40a and the second input / output coupling electrode. Compared with the case where it is at a branch point with 41a, it is possible to increase the current flowing through the portion of the first input coupling electrode facing the first resonant electrode 30a, and the second input / output point 45b has a third input / output point 45b. Compared with the case where the output coupling electrode 40b and the fourth input / output coupling electrode 41b are at the branch point, the current flowing through the portion of the third input / output coupling electrode 40b facing the third resonance electrode 30c can be increased. This is probably because of this.

またさらに、本例のバンドパスフィルタによれば、第２の入出力結合電極41ａは積層体の積層方向から見て第１の共振電極30ａの長さ方向の中央よりも一方端側と交わるように配置されており、第４の入出力結合電極41ｂは積層体の積層方向から見て第３の共振電極30ｃの長さ方向の中央よりも一方端側と交わるように配置されているときには、第２の入出力結合電極41ａと第１の共振電極30ａとの間の電界による結合を小さくするとともに、第４の入出力結合電極41ｂと第３の共振電極30ｃとの電界による結合を小さくすることができるので、第２の入出力結合電極41ａと第１の共振電極30ａとの電界による結合および第４の入出力結合電極41ｂと第３の共振電極30ｃとの電界による結合が大きくなることに起因するフィルタ特性の悪化を防止することができる。   Furthermore, according to the bandpass filter of this example, the second input / output coupling electrode 41a intersects with one end side from the center in the length direction of the first resonance electrode 30a when viewed from the stacking direction of the stacked body. When the fourth input / output coupling electrode 41b is arranged so as to cross one end side from the center in the length direction of the third resonance electrode 30c when viewed from the stacking direction of the stacked body, The coupling by the electric field between the second input / output coupling electrode 41a and the first resonance electrode 30a is reduced, and the coupling by the electric field between the fourth input / output coupling electrode 41b and the third resonance electrode 30c is reduced. Therefore, the coupling by the electric field between the second input / output coupling electrode 41a and the first resonance electrode 30a and the coupling by the electric field between the fourth input / output coupling electrode 41b and the third resonance electrode 30c are increased. Prevents deterioration of filter characteristics caused by Door can be.

なお、本例のバンドパスフィルタにおいて、第１および第２の複合共振電極29ａ，29ｂの第１の突起部28ａの長さと第２の突起部28ｂの長さとは、等しくしても良いが、ある程度異なるようにするのが望ましい。すなわち、第２の入出力結合電極41ａと電磁界結合する第１の複合共振電極29ａの第１の突起部28ａの長さは、第１の複合共振電極29ａの第２の突起部28ｂの長さよりも短くするのが望ましい。これにより、第２の入出力結合電極41ａとの電磁界結合に起因する第１の複合共振電極29ａの第１の突起部28ａの共振周波数の低下を補正することができる。同様に、第４の入出力結合電極41ｂと電磁界結合する第２の複合共振電極29ｂの第２の突起部28ｂの長さは第２の複合共振電極29ｂの第１の突起部28ａの長さよりも短くするのが望ましい。これにより、第４の入出力結合電極41ｂとの電磁界結合に起因する第２の複合共振電極29ｂの第２の突起部28ｂの共振周波数の低下を補正することができる。   In the band-pass filter of this example, the length of the first protrusion 28a and the length of the second protrusion 28b of the first and second composite resonance electrodes 29a and 29b may be equal. It is desirable to make it somewhat different. That is, the length of the first protrusion 28a of the first composite resonance electrode 29a electromagnetically coupled to the second input / output coupling electrode 41a is equal to the length of the second protrusion 28b of the first composite resonance electrode 29a. It is desirable to make it shorter. As a result, it is possible to correct a decrease in the resonance frequency of the first protrusion 28a of the first composite resonance electrode 29a due to electromagnetic coupling with the second input / output coupling electrode 41a. Similarly, the length of the second protrusion 28b of the second composite resonance electrode 29b electromagnetically coupled to the fourth input / output coupling electrode 41b is the length of the first protrusion 28a of the second composite resonance electrode 29b. It is desirable to make it shorter. Thereby, it is possible to correct a decrease in the resonance frequency of the second protrusion 28b of the second composite resonance electrode 29b caused by electromagnetic coupling with the fourth input / output coupling electrode 41b.

本例のバンドパスフィルタにおいて、誘電体層11の材質としては、例えばエポキシ樹脂等の樹脂や例えば誘電体セラミックス等のセラミックスを用いることができる。例えば、ＢａＴｉＯ３，Ｐｂ４Ｆｅ２Ｎｂ２Ｏ１２，ＴｉＯ２等の誘電体セラミック材料と、Ｂ２Ｏ３，ＳｉＯ２，Ａｌ２Ｏ３，ＺｎＯ等のガラス材料とからなり、800〜1200℃程度の比較的低い温度で焼成が可能なガラス−セラミック材料が好適に用いられる。また、誘電体層11の厚みとしては、例えば0.01〜0.1ｍｍ程度に設定される。 In the band-pass filter of this example, as the material of the dielectric layer 11, for example, a resin such as an epoxy resin or a ceramic such as a dielectric ceramic can be used. For example, a dielectric ceramic material such as BaTiO 3 , Pb 4 Fe 2 Nb 2 O 12 , or TiO 2 and a glass material such as B 2 O 3 , SiO 2 , Al 2 O 3 , or ZnO, and 800 to 1200 ° C. Glass-ceramic materials that can be fired at relatively low temperatures are preferably used. The thickness of the dielectric layer 11 is set to about 0.01 to 0.1 mm, for example.

前述した各種の電極および貫通導体の材質としては、例えば、Ａｇ，Ａｇ−Ｐｄ，Ａｇ−Ｐｔ等のＡｇ合金を主成分とする導電材料やＣｕ系，Ｗ系，Ｍｏ系，Ｐｄ系導電材料等が好適に用いられる。各種の電極の厚みは、例えば0.001〜0.2ｍｍに設定される。   Examples of the materials for the various electrodes and through conductors described above include conductive materials mainly composed of Ag alloys such as Ag, Ag-Pd, and Ag-Pt, Cu-based, W-based, Mo-based, and Pd-based conductive materials. Are preferably used. The thickness of various electrodes is set to 0.001 to 0.2 mm, for example.

本例のバンドパスフィルタは、例えば次のようにして作製することができる。まず、セラミック原料粉末に適当な有機溶剤等を添加・混合して泥漿を作製するとともに、ドクターブレード法によってセラミックグリーンシートを形成する。次に、得られたセラミックグリーンシートにパンチングマシーン等を用いて貫通導体を形成するための貫通孔を形成し、Ａｇ，Ａｇ−Ｐｄ，Ａｕ，Ｃｕ等の導体を含む導体ペーストを充填するとともにセラミックグリーンシートの表面に印刷法を用いて前述したのと同様の導体ペーストを塗布して導体ペースト付きセラミックグリーンシートを作製する。次に、これらの導体ペースト付きセラミックグリーンシートを積層し、ホットプレス装置を用いて圧着し、800℃〜1050℃程度のピーク温度で焼成することにより作製される。
（実施の形態の第２の例）
図５は、本発明の実施の形態の第２の例のバンドパスフィルタを模式的に示す外観斜視図である。図６は、図５に示すバンドパスフィルタの模式的な分解斜視図である。図７は、図５に示すバンドパスフィルタの上下面および層間を模式的に示す平面図である。図８は、図５のＱ−Ｑ’線断面図である。なお、本例においては前述した第１の例と異なる点のみについて説明し、同様の構成要素については同一の参照符号を用いて重複する説明を省略する。 The band pass filter of this example can be manufactured as follows, for example. First, an appropriate organic solvent or the like is added to and mixed with the ceramic raw material powder to produce a slurry, and a ceramic green sheet is formed by a doctor blade method. Next, a through hole for forming a through conductor is formed on the obtained ceramic green sheet using a punching machine, and a ceramic paste is filled with a conductor paste containing a conductor such as Ag, Ag-Pd, Au, or Cu. The same conductive paste as described above is applied to the surface of the green sheet using a printing method to produce a ceramic green sheet with a conductive paste. Next, these ceramic green sheets with conductor paste are laminated, pressed using a hot press device, and fired at a peak temperature of about 800 ° C. to 1050 ° C.
(Second example of embodiment)
FIG. 5 is an external perspective view schematically showing the band-pass filter of the second example of the embodiment of the present invention. 6 is a schematic exploded perspective view of the bandpass filter shown in FIG. FIG. 7 is a plan view schematically showing the upper and lower surfaces and layers of the bandpass filter shown in FIG. 8 is a cross-sectional view taken along the line QQ ′ of FIG. Note that in this example, only differences from the first example described above will be described, and the same components will be denoted by the same reference numerals, and redundant description will be omitted.

本例のバンドパスフィルタは、図５〜図８に示すように、共振補助電極32ａ，32ｂ，32ｃ，32ｄ１，32ｄ２を備えている。共振補助電極32ａ，32ｂ，32ｃは、積層体10の層間Ｂに、第２の環状接地電極24と対向するように配置されており、それぞれ、第１乃至第３の共振電極30ａ，30ｂ，30ｃの他方端部に貫通導体50を介して接続されている。また、共振補助電極32ｄ１，32ｄ２は、積層体10の層間Ａを間に挟んで層間Ｃと反対側に位置する層間Ｄに、第１の接地電極21と対向するように配置されており、それぞれ、第４の共振電極30ｄの第１部分30ｄ１および第２部分30ｄ２の他方端部に貫通導体50を介して接続されている。   As shown in FIGS. 5 to 8, the band-pass filter of this example includes resonance auxiliary electrodes 32a, 32b, 32c, 32d1, and 32d2. The resonance auxiliary electrodes 32a, 32b, and 32c are disposed between the layers B of the multilayer body 10 so as to face the second annular ground electrode 24, and the first to third resonance electrodes 30a, 30b, and 30c, respectively. Is connected to the other end of each through a through conductor 50. Further, the resonance auxiliary electrodes 32d1 and 32d2 are arranged to face the first ground electrode 21 in an interlayer D located on the opposite side of the interlayer C with the interlayer A of the laminate 10 in between. The fourth resonance electrode 30d is connected to the other ends of the first portion 30d1 and the second portion 30d2 through a through conductor 50.

このような構成を備える本例のバンドパスフィルタによれば、共振補助電極32ａ，32ｂ，32ｃと第２の環状接地電極24との間に生じる静電容量により、第１乃至第３の共振電極30ａ，30ｂ，30ｃの長さを短縮することができる。また、共振補助電極32ｄ１，32ｄ２と第１の接地電極21との間に生じる静電容量により、第４の共振電極30ｄ長さを短縮することができる。よって、より小型のバンドパスフィルタを得ることができる。   According to the band-pass filter of this example having such a configuration, the first to third resonance electrodes are generated by the capacitance generated between the resonance auxiliary electrodes 32a, 32b, 32c and the second annular ground electrode 24. The length of 30a, 30b, 30c can be shortened. The length of the fourth resonance electrode 30d can be shortened by the capacitance generated between the resonance auxiliary electrodes 32d1 and 32d2 and the first ground electrode 21. Therefore, a smaller bandpass filter can be obtained.

また、本例のバンドパスフィルタは、第１の結合補助電極46ａおよび第２の結合補助電極46ｂを備えている。第１の結合補助電極46ａは、積層体10の第１の層間に、共振補助電極32ａと対向するように配置されている。また、第１の結合補助電極46ａは、一方端部が貫通導体50を介して第１の入出力結合電極40ａの第１の入出力点45ａに接続されるとともに、他方端部が他の貫通導体50を介して第１の入出力端子電極60ａに接続されている。第２の結合補助電極46ｂは、積層体10の第１の層間に、共振補助電極32ｃと対向するように配置されている。また、第２の結合補助電極46ｂは、一方端部が貫通導体50を介して第３の入出力結合電極40ｂの第２の入出力点45ｂに接続されるとともに、他方端部が他の貫通導体50を介して第２の入出力端子電極60ｂに接続されている。   The band pass filter of this example includes a first coupling auxiliary electrode 46a and a second coupling auxiliary electrode 46b. The first coupling auxiliary electrode 46a is disposed between the first layers of the multilayer body 10 so as to face the resonance auxiliary electrode 32a. The first coupling auxiliary electrode 46a has one end connected to the first input / output point 45a of the first input / output coupling electrode 40a via the through conductor 50 and the other end connected to the other through-hole. The conductor 50 is connected to the first input / output terminal electrode 60a. The second coupling auxiliary electrode 46b is disposed between the first layers of the multilayer body 10 so as to face the resonance auxiliary electrode 32c. The second coupling auxiliary electrode 46b has one end connected to the second input / output point 45b of the third input / output coupling electrode 40b through the through conductor 50, and the other end connected to the other penetration. The conductor 50 is connected to the second input / output terminal electrode 60b.

このような構成を備える本例のバンドパスフィルタによれば、第１の共振電極30ａおよび共振補助電極32ａの接合体と、第１の入出力結合電極40ａおよび第１の結合補助電極46ａの接合体とが、全体的にブロードサイドでインターデジタル型に強く電磁界結合する。また、第３の共振電極30ｃおよび共振補助電極32ｃの接合体と、第３の入出力結合電極40ｂおよび第２の結合補助電極46ｂの接合体とが、全体的にブロードサイドでインターデジタル型に強く電磁界結合する。これにより、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄによって形成される広い第１の通過帯域の全体に渡って平坦で低損失な、優れた通過特性を有するバンドパスフィルタを得ることができる。
（実施の形態の第３の例）
図９は、本発明の実施の形態の第３の例のバンドパスフィルタを模式的に示す外観斜視図である。図10は、図９に示すバンドパスフィルタの模式的な分解斜視図である。図11は、図９に示すバンドパスフィルタの上下面および層間を模式的に示す平面図である。図12は、図９のＲ−Ｒ’線断面図である。なお、本例においては前述した第２の例と異なる点のみについて説明し、同様の構成要素については同一の参照符号を用いて重複する説明を省略する。 According to the bandpass filter of this example having such a configuration, the joined body of the first resonance electrode 30a and the resonance auxiliary electrode 32a, and the junction of the first input / output coupling electrode 40a and the first coupling auxiliary electrode 46a. The body is generally broadside and strongly electromagnetically coupled to the interdigital type. Further, the joined body of the third resonance electrode 30c and the auxiliary resonance electrode 32c and the joined body of the third input / output coupling electrode 40b and the second coupling auxiliary electrode 46b are interdigital on the broad side. Strong electromagnetic coupling. As a result, a bandpass filter having excellent pass characteristics with flatness and low loss over the entire wide first passband formed by the first to fourth resonance electrodes 30a, 30b, 30c, and 30d is obtained. be able to.
(Third example of embodiment)
FIG. 9 is an external perspective view schematically showing the band-pass filter of the third example of the embodiment of the present invention. FIG. 10 is a schematic exploded perspective view of the bandpass filter shown in FIG. FIG. 11 is a plan view schematically showing the upper and lower surfaces and layers of the bandpass filter shown in FIG. 12 is a cross-sectional view taken along the line RR ′ of FIG. In this example, only points different from the second example described above will be described, and the same components will be denoted by the same reference numerals, and redundant description will be omitted.

本例のバンドパスフィルタによれば、図９〜12に示すように、第２の入出力結合電極41ａおよび第４の入出力結合電極41ｂは、積層体10の第１の層間と層間Ｂとの間に位置する層間Ｅに配置されており、第１の結合補助電極46ａおよび第２の結合補助電極46ｂは、積層体10の層間Ｅと層間Ｂとの間に位置する層間Ｆに配置されている。なお、第２の入出力結合電極41ａは、貫通導体50を介して第１の入出力結合電極40ａに接続されており、第４の入出力結合電極41ｂは、貫通導体50を介して第３の入出力結合電極40ｂに接続されている。   According to the bandpass filter of this example, as shown in FIGS. 9 to 12, the second input / output coupling electrode 41 a and the fourth input / output coupling electrode 41 b are connected to the first layer and the layer B of the laminate 10. The first coupling auxiliary electrode 46a and the second coupling auxiliary electrode 46b are arranged in the interlayer F located between the interlayer E and the interlayer B of the stacked body 10. ing. The second input / output coupling electrode 41a is connected to the first input / output coupling electrode 40a via the through conductor 50, and the fourth input / output coupling electrode 41b is connected to the third input / output coupling electrode 41a via the through conductor 50. Are connected to the input / output coupling electrode 40b.

このような構成を備える本例のバンドパスフィルタによれば、第１の入出力結合電極40ａおよび第３の入出力結合電極40ｂと第１の共振電極30ａおよび第３の共振電極30ｃとの間隔ならびに第２の入出力結合電極41ａおよび第４の入出力結合電極41ｂと第１の複合共振電極29ａおよび第２の複合共振電極29ｂとの間隔を維持したままで、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄと第１および第２の複合共振電極29ａ，29ｂとの間隔を大きくすることができる。これにより、第１乃至第４の共振電極30ａ，30ｂ，30ｃ，30ｄと第１および第２の複合共振電極29ａ，29ｂとの電磁界結合が強くなりすぎることによる悪影響をさらに低減することができる。   According to the bandpass filter of this example having such a configuration, the distance between the first input / output coupling electrode 40a and the third input / output coupling electrode 40b and the first resonance electrode 30a and the third resonance electrode 30c. The first to fourth resonances are maintained while maintaining the distances between the second input / output coupling electrode 41a and the fourth input / output coupling electrode 41b and the first composite resonance electrode 29a and the second composite resonance electrode 29b. The distance between the electrodes 30a, 30b, 30c, 30d and the first and second composite resonance electrodes 29a, 29b can be increased. Thereby, it is possible to further reduce the adverse effects caused by too strong electromagnetic field coupling between the first to fourth resonance electrodes 30a, 30b, 30c, 30d and the first and second composite resonance electrodes 29a, 29b. .

（実施の形態の第４の例）
図13は本発明の実施の形態の第４の例の無線通信モジュール80および無線通信機器85を模式的に示すブロック図である。 (Fourth example of embodiment)
FIG. 13 is a block diagram schematically showing a wireless communication module 80 and a wireless communication device 85 of the fourth example of the embodiment of the present invention.

本例の無線通信モジュール80は、ベースバンド信号が処理されるベースバンド部81と、ベースバンド部81に接続されベースバンド信号の変調後および復調前のＲＦ信号が処理されるＲＦ部82とを備えている。ＲＦ部82には前述した本発明のバンドパスフィルタ821が含まれており、ベースバンド信号が変調されてなるＲＦ信号または受信したＲＦ信号における通信帯域以外の信号をバンドパスフィルタ821によって減衰させている。   The wireless communication module 80 of this example includes a baseband unit 81 that processes baseband signals, and an RF unit 82 that is connected to the baseband unit 81 and processes RF signals after modulation of the baseband signals and before demodulation. I have. The RF unit 82 includes the band-pass filter 821 of the present invention described above. The band-pass filter 821 attenuates signals other than the communication band in the RF signal obtained by modulating the baseband signal or the received RF signal. Yes.

具体的な構成としては、ベースバンド部81にはベースバンドＩＣ 811が配置され、ＲＦ部82にはバンドパスフィルタ821とベースバンド部81との間にＲＦ ＩＣ 822が配置されている。なお、これらの回路間には別の回路が介在していてもよい。そして、無線通信モジュール80のバンドパスフィルタ821にアンテナ84を接続することによってＲＦ信号の送受信がなされる本例の無線通信機器85が構成される。   Specifically, a baseband IC 811 is disposed in the baseband unit 81, and an RF IC 822 is disposed between the bandpass filter 821 and the baseband unit 81 in the RF unit 82. Note that another circuit may be interposed between these circuits. Then, by connecting the antenna 84 to the bandpass filter 821 of the wireless communication module 80, the wireless communication device 85 of this example that transmits and receives RF signals is configured.

このような構成を有する本例の無線通信モジュール80および無線通信機器85によれば、２つの広い通過帯域の全域に渡って低損失であるとともに、２つの通過帯域の間に３つの減衰極が形成されて減衰量が充分に確保された本発明のバンドパスフィルタ821を用いて、２つの通信帯域の信号の濾波を行なうことができる。これにより、通信信号の減衰を少なくするとともに、ノイズを少なくすることができるため、受信感度が向上するとともに、通信信号の増幅度を小さくすることができるので、増幅回路における消費電力が少なくなる。さらに、２つの通信帯域の濾波を１つのフィルタによって行うことができるので、回路構成を簡略化できるとともに部品点数を削減することができる。よって、小型で受信感度が高く消費電力が少ない高性能な無線通信モジュール80および無線通信機器85を得ることができる。   According to the wireless communication module 80 and the wireless communication device 85 of this example having such a configuration, the loss is low over the entire two wide passbands, and three attenuation poles are provided between the two passbands. By using the bandpass filter 821 of the present invention that is formed and sufficiently secured in attenuation, signals in two communication bands can be filtered. As a result, the attenuation of the communication signal can be reduced and the noise can be reduced, so that the reception sensitivity is improved and the amplification degree of the communication signal can be reduced, so that the power consumption in the amplifier circuit is reduced. Furthermore, since the filtering of the two communication bands can be performed by one filter, the circuit configuration can be simplified and the number of parts can be reduced. Therefore, it is possible to obtain a high-performance wireless communication module 80 and a wireless communication device 85 that are small in size, high in reception sensitivity, and low in power consumption.

（変形例）
本発明は前述した実施の形態の第１〜第４の例に限定されるものではなく、本発明の要旨を逸脱しない範囲において種々の変更，改良が可能である。 (Modification)
The present invention is not limited to the first to fourth examples of the embodiment described above, and various modifications and improvements can be made without departing from the gist of the present invention.

例えば、前述した実施の形態の第１〜第３の例においては、第１の入出力端子電極60ａおよび第２の入出力端子電極60ｂを備えた例を示した。しかしながら、モジュール基板の中の一領域にバンドパスフィルタが形成される場合等では、第１の入出力端子電極60ａおよび第２の入出力端子電極60ｂは必ずしも必要ではなく、例えば、モジュール基板内の外部回路からの配線導体が、第１の入出力結合電極40ａおよび第３の入出力結合電極40ｂに直接接続するようにしても構わない。この場合には、第１の入出力結合電極40ａおよび第３の入出力結合電極40ｂと配線導体との接続点が、第１の入出力点45ａおよび第２の入出力点45ｂとなる。   For example, in the first to third examples of the above-described embodiment, an example in which the first input / output terminal electrode 60a and the second input / output terminal electrode 60b are provided has been described. However, when a band-pass filter is formed in one region of the module substrate, the first input / output terminal electrode 60a and the second input / output terminal electrode 60b are not necessarily required. A wiring conductor from an external circuit may be directly connected to the first input / output coupling electrode 40a and the third input / output coupling electrode 40b. In this case, the connection points between the first input / output coupling electrode 40a and the third input / output coupling electrode 40b and the wiring conductor are the first input / output point 45a and the second input / output point 45b.

また、前述した実施の形態の第１〜第３の例においては、積層体10の下面に第１の接地電極21を配置し、積層体10の上面に第２の接地電極22を配置した例を示したが、例えば、第１の接地電極21の下にさらに誘電体層を配置しても構わないし、第２の接地電極22の上にさらに誘電体層を配置しても構わない。また、第１の接地電極21および第２の接地電極22の一方のみを備えるようにしても構わない。   In the first to third examples of the above-described embodiment, the first ground electrode 21 is disposed on the lower surface of the multilayer body 10 and the second ground electrode 22 is disposed on the upper surface of the multilayer body 10. However, for example, a dielectric layer may be further disposed below the first ground electrode 21, or a dielectric layer may be further disposed on the second ground electrode 22. Further, only one of the first ground electrode 21 and the second ground electrode 22 may be provided.

またさらに、前述した実施の形態の第１〜第３の例においては、バンドパスフィルタが１つの積層体10の中に構成された例を示したが、厚み方向に積層された複数の積層体にまたがってバンドパスフィルタが構成されるようにしてもかまわない。   Furthermore, in the first to third examples of the above-described embodiment, the example in which the bandpass filter is configured in one laminated body 10 is shown, but a plurality of laminated bodies laminated in the thickness direction. Alternatively, a band pass filter may be formed across the two.

さらにまた、前述した実施の形態の第１〜第３の例においては、第１の入出力結合電極40ａと第３の入出力結合電極40ｂとが積層体10の同じ層間に配置され、第４の共振電極30ｄの第１部分30ｄ１と第２部分30ｄ２とが積層体10の同じ層間に配置された例を示した。しかしながら、第１の入出力結合電極40ａと第３の入出力結合電極40ｂとは、積層体10の第１の層間と第２の層間との間であれば、異なる層間に配置されるようにしても構わない。同様に、第４の共振電極30ｄの第１部分30ｄ１と第２部分30ｄ２とが、積層体10の異なる層間に配置されるようにしても構わない。   Furthermore, in the first to third examples of the above-described embodiment, the first input / output coupling electrode 40a and the third input / output coupling electrode 40b are arranged between the same layers of the stacked body 10, and the fourth The example in which the first portion 30d1 and the second portion 30d2 of the resonant electrode 30d are arranged between the same layers of the multilayer body 10 is shown. However, the first input / output coupling electrode 40a and the third input / output coupling electrode 40b are arranged between different layers as long as they are between the first layer and the second layer of the stacked body 10. It doesn't matter. Similarly, the first portion 30d1 and the second portion 30d2 of the fourth resonance electrode 30d may be disposed between different layers of the stacked body 10.

またさらに、ＵＷＢに用いられるバンドパスフィルタを例示してこれまで説明を行なってきたが、他の用途においても本発明のバンドパスフィルタが有効であることは言うまでもない。   Furthermore, although the bandpass filter used for UWB has been exemplified and described so far, it goes without saying that the bandpass filter of the present invention is effective in other applications.

次に、本発明のバンドパスフィルタの具体例について説明する。   Next, a specific example of the bandpass filter of the present invention will be described.

図９〜12に示した本発明の実施の形態の第３の例のバンドパスフィルタの電気特性を、有限要素法を用いたシミュレーションによって算出した。そのシミュレーション結果を図14に示す。グラフの横軸は周波数で縦軸は減衰量であり、バンドパスフィルタの通過特性（Ｓ21）および反射特性（Ｓ11）を示している。   The electrical characteristics of the bandpass filter of the third example of the embodiment of the present invention shown in FIGS. 9 to 12 were calculated by simulation using the finite element method. The simulation results are shown in FIG. The horizontal axis of the graph is frequency, and the vertical axis is attenuation, and shows the pass characteristic (S21) and reflection characteristic (S11) of the bandpass filter.

図14に示す通過特性においては、２つの広くて平坦な通過帯域が形成されているとともに、第１の通過帯域と第２の通過帯域との間に３つの減衰極が形成されており、２つの通過帯域の間の周波数領域における減衰量が充分に確保されていることがわかる。これにより、本発明の有効性が確認できた。   In the pass characteristic shown in FIG. 14, two wide and flat passbands are formed, and three attenuation poles are formed between the first passband and the second passband. It can be seen that a sufficient amount of attenuation is secured in the frequency region between the two passbands. Thereby, the effectiveness of the present invention was confirmed.

なお、このシミュレーションにおいては、第１乃至第３の共振電極30ａ，30ｂ，30ｃは幅が0.175ｍｍで長さが4.05ｍｍの矩形状とした。第４の共振電極30ｄは、幅が0.125ｍｍで長さが3.9ｍｍの第１部分30ｄ１および第２部分30ｄ２と、幅が0.125ｍｍで長さが0.4ｍｍの接続部30ｄ３とを接続したＵ字型の形状とした。第１の複合共振電極29ａは、幅が0.76ｍｍで長さが0.98ｍｍの基部27の他方端に、幅が0.25ｍｍで長さが0.97ｍｍの第１の突起部28ａおよび幅が0.25ｍｍで長さが2.22ｍｍの第２の突起部28ｂが接続された構造とした。第２の複合共振電極29ｂは、幅が0.76ｍｍで長さが0.98ｍｍの基部27の他方端に、幅が0.25ｍｍで長さが2.22ｍｍの第１の突起部28ａおよび幅が0.25ｍｍで長さが0.97ｍｍの第２の突起部28ｂが接続された構造とした。第１の入出力結合電極40ａおよび第３の入出力結合電極40ｂは、それぞれ幅が0.15ｍｍで長さが3.7ｍｍの矩形状とした。第２の入出力結合電極41ａおよび第４の入出力結合電極41ｂは、それぞれ幅が0.25ｍｍで長さが0.45ｍｍの矩形状とした。共振電極結合導体35は、幅が0.075ｍｍで長さが0.7ｍｍの第１および第２の結合部35ａ，35ｂを、幅が0.075ｍｍで長さが0.7ｍｍの接続部35ｃで接続したクランク状の構造とした。第１の結合補助電極46ａおよび第２の結合補助電極46ｂは、それぞれ幅が0.15ｍｍで長さが0.9ｍｍの矩形状とした。各種電極の厚みは0.01ｍｍとした。貫通導体50の直径は0.1ｍｍとした。積層体10は幅が４ｍｍで長さが５ｍｍで厚みが0.49ｍｍの直方体状とした。積層体の上面と第１の層間との間隔（それぞれに配置された各種電極同士の間隔）は0.19ｍｍとし、層間Ａと層間Ｃおよび層間Ｄとの間隔はそれぞれ0.065ｍｍとし、下面と層間Ｄとの間隔およびその他の隣り合う層間の間隔はそれぞれ0.015ｍｍとした。誘電体層11の比誘電率は9.45とした。   In this simulation, the first to third resonance electrodes 30a, 30b, and 30c have a rectangular shape with a width of 0.175 mm and a length of 4.05 mm. The fourth resonance electrode 30d has a U-shape in which a first portion 30d1 and a second portion 30d2 having a width of 0.125 mm and a length of 3.9 mm are connected to a connection portion 30d3 having a width of 0.125 mm and a length of 0.4 mm. The shape of the mold. The first composite resonance electrode 29a has a first protrusion 28a having a width of 0.25 mm and a length of 0.97 mm and a width of 0.25 mm on the other end of the base 27 having a width of 0.76 mm and a length of 0.98 mm. A second protrusion 28b having a length of 2.22 mm was connected. The second composite resonance electrode 29b has a first protrusion 28a having a width of 0.25 mm and a length of 2.22 mm and a width of 0.25 mm on the other end of the base 27 having a width of 0.76 mm and a length of 0.98 mm. A second protrusion 28b having a length of 0.97 mm was connected. The first input / output coupling electrode 40a and the third input / output coupling electrode 40b each have a rectangular shape with a width of 0.15 mm and a length of 3.7 mm. The second input / output coupling electrode 41a and the fourth input / output coupling electrode 41b each have a rectangular shape with a width of 0.25 mm and a length of 0.45 mm. The resonant electrode coupling conductor 35 has a crank shape in which the first and second coupling portions 35a and 35b having a width of 0.075 mm and a length of 0.7 mm are connected by a connection portion 35c having a width of 0.075 mm and a length of 0.7 mm. The structure is as follows. The first coupling auxiliary electrode 46a and the second coupling auxiliary electrode 46b each have a rectangular shape with a width of 0.15 mm and a length of 0.9 mm. The thickness of each electrode was 0.01 mm. The diameter of the through conductor 50 was 0.1 mm. The laminate 10 was a rectangular parallelepiped having a width of 4 mm, a length of 5 mm, and a thickness of 0.49 mm. The distance between the upper surface of the laminate and the first interlayer (the distance between the electrodes disposed on each of the layers) is 0.19 mm, the distance between the interlayer A, the interlayer C, and the interlayer D is 0.065 mm, and the lower surface and the interlayer D And the distance between other adjacent layers was 0.015 mm, respectively. The relative dielectric constant of the dielectric layer 11 was 9.45.

10：積層体
11：誘電体層
27：基部
28ａ：第１の突起部
28ｂ：第２の突起部
29ａ：第１の複合共振電極
29ｂ：第２の複合共振電極
30ａ：第１の共振電極
30ｂ：第２の共振電極
30ｃ：第３の共振電極
30ｄ：第４の共振電極
30ｄ１：第１部分
30ｄ２：第２部分
30ｄ３：接続部
35：共振電極結合導体
40ａ：第１の入出力結合電極
41ａ：第２の入出力結合電極
40ｂ：第３の入出力結合電極
41ｂ：第４の入出力結合電極
45ａ：第１の入出力点
45ｂ：第２の入出力点
80：無線通信モジュール
81：ベースバンド部
82：ＲＦ部
821：バンドパスフィルタ
84：アンテナ
85：無線通信機器 10: Laminate
11: Dielectric layer
27: Base
28a: first protrusion
28b: second protrusion
29a: first composite resonant electrode
29b: second composite resonance electrode
30a: first resonance electrode
30b: second resonant electrode
30c: third resonant electrode
30d: Fourth resonant electrode
30d1: 1st part
30d2: Second part
30d3: Connection part
35: Resonant electrode coupling conductor
40a: first input / output coupling electrode
41a: second input / output coupling electrode
40b: third input / output coupling electrode
41b: Fourth input / output coupling electrode
45a: First input / output point
45b: Second input / output point
80: Wireless communication module
81: Baseband
82: RF section
821: Band pass filter
84: Antenna
85: Wireless communication equipment

Claims (4)

複数の誘電体層が積層されてなる積層体と、
該積層体の上面および下面の少なくとも一方に配置された接地電極と、
基部ならびに帯状の第１および第２の突起部によってそれぞれ構成された第１および第２の複合共振電極であって、前記基部の一方端が接地され、前記第１および第２の突起部が前記基部の他方端に各々の一方端が接続されて横並びに配置され、前記基部の前記一方端が各々の前記複合共振電極の一方端となり、前記突起部の他方端が各々の前記複合共振電極の他方端となり、各々の前記複合共振電極の前記基部および前記突起部を合わせた全体が第１の周波数で共振する共振器として機能するとともに、各々の前記複合共振電極の前記突起部が前記第１の周波数よりも高い第２の周波数で共振する共振器として機能し、各々の前記複合共振電極の前記一方端が逆側に位置するとともに前記第１の複合共振電極の前記第２の突起部および前記第２の複合共振電極の前記第１の突起部が隣接するように前記積層体の第１の層間に横並びに配置された、第１および第２の複合共振電極と、
前記積層体の前記第１の層間とは異なる第２の層間に横並びに順次配置された、それぞれ一方端が接地されて１／４波長共振器として機能する帯状の第１乃至第３の共振電極と、
前記第２の層間を間に挟んで前記第１の層間と反対側に位置する層間に配置された、前記第２の共振電極に平行に近接配置されて電磁界結合する帯状の第１部分および前記第３の共振電極に平行に近接配置されて電磁界結合する帯状の第２部分ならびに前記第１および第２部分の一方端同士を接続する接続部からなり、１／２波長共振器として機能する第４の共振電極と、
前記積層体の前記第１の層間と前記第２の層間との間に位置する層間に配置された、前記第１の共振電極の長さ方向の半分以上に渡る領域と対向して電磁界結合するとともに、電気信号が入力または出力される第１の入出力点を有する第１の入出力結合電極と、
前記積層体の前記第１の層間と前記第２の層間との間に位置する層間に配置された、前記第１の複合共振電極における前記第１の突起部と対向して電磁界結合する第２の入出力結合電極と、
前記積層体の前記第１の層間と前記第２の層間との間に位置する層間に配置された、前記第３の共振電極の長さ方向の半分以上に渡る領域と対向して電磁界結合するとともに、電気信号が入力または出力される第２の入出力点を有する第３の入出力結合電極と、
前記積層体の前記第１の層間と前記第２の層間との間に位置する層間に配置された、前記第２の複合共振電極における前記第２の突起部と対向して電磁界結合する第４の入出力結合電極と、
前記積層体の前記第２の層間を間に挟んで前記第１の層間と反対側に位置する層間に配置された、前記第１および第３の共振電極にそれぞれ対向して主に容量性の電磁界結合をする領域を有する共振電極結合導体とを備え、
前記第１の共振電極の前記一方端と前記第２の共振電極の他方端とが同じ側に位置しており、前記第２の共振電極の前記一方端と前記第４の共振電極の前記第１部分の他方端とが同じ側に位置しており、前記第３の共振電極の前記一方端と前記第４の共振電極の前記第２部分の他方端とが同じ側に位置しており、
前記第１の入出力点は、前記第１の入出力結合電極の長さ方向において、前記第１の共振電極との対向部の中央よりも前記第１の共振電極の前記一方端から遠い側に位置しており、前記第２の入出力点は、前記第３の入出力結合電極の長さ方向において、前記第３の共振電極との対向部の中央よりも前記第３の共振電極の前記一方端から遠い側に位置しており、
前記第１乃至第３の共振電極と各々の前記複合共振電極における各々の前記突起部とは前記積層体の積層方向から見て互いに直交するように配置されており、
前記第２の入出力結合電極は前記第１の入出力結合電極の前記第１の共振電極との対向部における長さ方向の中央よりも前記第１の入出力点から遠い側に接続されて前記第１の入出力結合電極を介して電気信号が入力または出力されるとともに、前記第４の入出力結合電極は前記第３の入出力結合電極の前記第３の共振電極との対向部における長さ方向の中央よりも前記第２の入出力点から遠い側に接続されて前記第３の入出力結合電極を介して電気信号が入力または出力され、
通過特性において、前記第１乃至第４の共振電極によって形成される第１の通過帯域と、前記第１および第２の複合共振電極によって形成される第２の通過帯域とを有することを特徴とするバンドパスフィルタ。 A laminate in which a plurality of dielectric layers are laminated;
A ground electrode disposed on at least one of the upper surface and the lower surface of the laminate;
A first and second composite resonance electrodes each constituted by a base and strip-shaped first and second protrusions, wherein one end of the base is grounded, and the first and second protrusions are One end of each of the bases is connected to the other end of the base and arranged side by side, the one end of the base becomes one end of each of the composite resonance electrodes, and the other end of the projections of each of the composite resonance electrodes The other end of the composite resonance electrode functions as a resonator that resonates at a first frequency, and the projection of each composite resonance electrode is the first end. Functioning as a resonator that resonates at a second frequency higher than the first frequency, the one end of each of the composite resonance electrodes is located on the opposite side, and the second protrusion of the first composite resonance electrode and Above Said first protrusion of the second composite resonance electrodes are arranged side by side on the first interlayer of the laminated body so as to be adjacent, the first and second complex resonance electrode,
Band-shaped first to third resonance electrodes which are sequentially arranged side by side between second layers different from the first layer of the laminate, and each end is grounded and functions as a quarter wavelength resonator. When,
A band-shaped first portion that is disposed in the vicinity of the second resonance electrode and is electromagnetically coupled to the second resonance electrode disposed between layers on the opposite side of the first layer with the second layer interposed therebetween; A band-shaped second portion that is disposed in parallel and close to the third resonance electrode and electromagnetically couples, and a connection portion that connects one ends of the first and second portions, and functions as a half-wave resonator A fourth resonant electrode that
Electromagnetic field coupling opposite to a region extending over half the length direction of the first resonance electrode, disposed between the first and second layers of the laminate. And a first input / output coupling electrode having a first input / output point to which an electrical signal is input or output;
A first electromagnetic field coupled opposite to the first protrusion of the first composite resonance electrode disposed between the first layer and the second layer of the multilayer body; Two input / output coupling electrodes;
Electromagnetic field coupling opposite to a region extending over half of the length of the third resonance electrode disposed between the first and second layers of the laminate. And a third input / output coupling electrode having a second input / output point to which an electric signal is input or output,
A first electromagnetic field coupled opposite to the second protrusion of the second composite resonance electrode disposed between the first and second layers of the multilayer body; 4 input / output coupling electrodes;
Mainly capacitive facing each of the first and third resonance electrodes, which are disposed on the opposite side of the first layer with the second layer of the laminate interposed therebetween. A resonant electrode coupling conductor having a region for electromagnetic coupling,
The one end of the first resonance electrode and the other end of the second resonance electrode are located on the same side, and the one end of the second resonance electrode and the first end of the fourth resonance electrode The other end of one part is located on the same side, the one end of the third resonance electrode and the other end of the second part of the fourth resonance electrode are located on the same side,
The first input / output point is a side farther from the one end of the first resonance electrode than the center of the portion facing the first resonance electrode in the length direction of the first input / output coupling electrode. The second input / output point is located in the length direction of the third input / output coupling electrode, and the second input / output point Located on the side far from the one end,
The first to third resonance electrodes and each protrusion in each composite resonance electrode are arranged to be orthogonal to each other when viewed from the stacking direction of the stacked body,
The second input / output coupling electrode is connected to a side farther from the first input / output point than the center in the length direction at the portion of the first input / output coupling electrode facing the first resonance electrode. An electrical signal is input or output through the first input / output coupling electrode, and the fourth input / output coupling electrode is at a portion of the third input / output coupling electrode facing the third resonance electrode. An electrical signal is input or output via the third input / output coupling electrode connected to a side farther from the second input / output point than the center in the length direction,
In the pass characteristic, it has a first pass band formed by the first to fourth resonance electrodes and a second pass band formed by the first and second composite resonance electrodes. Bandpass filter to be used. 前記第２の入出力結合電極は前記積層体の積層方向から見て前記第１の共振電極の長さ方向の中央よりも前記一方端側と交わるように配置されており、前記第４の入出力結合電極は前記積層体の積層方向から見て前記第３の共振電極の長さ方向の中央よりも前記一方端側と交わるように配置されていることを特徴とする請求項１に記載のバンドパスフィルタ。   The second input / output coupling electrode is disposed so as to cross the one end side with respect to the center in the length direction of the first resonance electrode when viewed from the stacking direction of the stacked body. 2. The output coupling electrode according to claim 1, wherein the output coupling electrode is disposed so as to intersect the one end side with respect to the center in the length direction of the third resonance electrode when viewed from the stacking direction of the stacked body. Bandpass filter. 請求項１または請求項２に記載のバンドパスフィルタを備えることを特徴とする無線通信モジュール。   A wireless communication module comprising the bandpass filter according to claim 1. 請求項１または請求項２に記載のバンドパスフィルタを含むＲＦ部と、該ＲＦ部に接続されたベースバンド部と、前記ＲＦ部に接続されたアンテナとを備えることを特徴とする無線通信機器。   A radio communication device comprising: an RF unit including the bandpass filter according to claim 1; a baseband unit connected to the RF unit; and an antenna connected to the RF unit. .
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