JP2004253639A - High frequency component - Google Patents

High frequency component Download PDF

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Publication number
JP2004253639A
JP2004253639A JP2003042830A JP2003042830A JP2004253639A JP 2004253639 A JP2004253639 A JP 2004253639A JP 2003042830 A JP2003042830 A JP 2003042830A JP 2003042830 A JP2003042830 A JP 2003042830A JP 2004253639 A JP2004253639 A JP 2004253639A
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JP
Japan
Prior art keywords
circuit
frequency
multilayer substrate
electrode group
high frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003042830A
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Japanese (ja)
Inventor
Masatoshi Maeda
正俊 前田
Tetsuya Tsurunari
哲也 鶴成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2003042830A priority Critical patent/JP2004253639A/en
Publication of JP2004253639A publication Critical patent/JP2004253639A/en
Pending legal-status Critical Current

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  • Production Of Multi-Layered Print Wiring Board (AREA)
  • Waveguides (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To suppress an interference through a ground electrode between high frequency circuits in a composite high frequency component to be used for communication equipment. <P>SOLUTION: This high frequency component comprises an LPF 5 as a first high frequency circuit formed of a first circuit electrode group 20 constituted of a plurality of circuit electrodes 16 at the internal layer of a multi-layer substrate 13 and a high frequency switch 4 as a second high frequency circuit formed of an active element component 14 mounted on the multi-layer substrate 13 and a second circuit electrode group 21 constituted of a plurality of circuit electrodes 15 at the internal layer of the multi-layer substrate 13. In this case, ground electrodes 18 and 19 for grounding the respective high frequency circuits 4 and 5 are formed on different dielectric layers 13a. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は主として通信機器に用いられる高周波部品に関する。
【0002】
【従来の技術】
近年、高周波フィルタと高周波スイッチなどの異なる高周波回路を一体に設計するといった高周波部品の複合化が進められる中、コンデンサやインダクタといった受動素子を多層基板内で形成し、ダイオードやFETといった能動素子を用いた能動素子部品を多層基板上に実装する構成が開発されている。
【0003】
従来、このような高周波部品において高周波回路毎に有する接地用のコンデンサは、それぞれ多層基板の内部に形成した回路電極を多層基板の下面側にシールド効果を得るために設けられたグランド電極と対向させることで形成していた。
【0004】
なお、この出願の発明に関連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。
【0005】
【特許文献1】
特開2001−177434号公報
【0006】
【発明が解決しようとする課題】
しかしながら、接地用のコンデンサを形成するといっても、異なる高周波回路を形成する回路電極が、それぞれが共通の電極(グランド電極)に接続されることで、この共通のグランド電極を介してそれぞれの高周波回路間に影響を及ぼしてしまい、複合化された高周波部品としての電気特性を劣化させていた。
【0007】
そこで、本発明はこのような問題を解決し、高周波部品の電気特性の向上を目的とする。
【0008】
【課題を解決するための手段】
この目的を達成するために本発明の請求項1に記載の発明は、特に多層基板の内層部分で複数の回路電極からなる第1の回路電極群により形成される第1の高周波回路と、多層基板に実装される能動素子部品と多層基板の内層部分で複数の回路電極からなる第2の回路電極群により形成される第2の高周波回路とからなる高周波部品において、それぞれの高周波回路を形成する接地用のグランド電極を、多層基板における異なる誘電体層上に形成したことで、異なる高周波回路間におけるグランド電極を介しての干渉を抑制でき、結果として高周波部品の電気特性を向上できるのである。
【0009】
請求項2に記載の発明は、特に多層基板において、第1の回路電極群を第2の回路電極群より下層部分で形成したことで、多層基板内において異なる高周波回路を形成する第1、第2の回路電極群を多層基板内において上下方向に分離され、異なる高周波回路間の干渉を抑制でき、結果として高周波部品の電気特性を向上できるのである。
【0010】
請求項3に記載の発明は、特に多層基板において、第1のグランド電極を第1の回路電極群より下層側に形成し、第2のグランド電極を第2の回路電極群より上層側に形成したことで、多層基板に実装される能動素子部品と第2のグランド電極との距離が近接し、この間に生じるインダクタ成分を抑制でき、結果として高周波部品の電気特性を向上できるのである。
【0011】
請求項4に記載の発明は、特に多層基板において、第1の回路電極群と、第2の回路電極群との間にシールド電極を形成したことで、多層基板に実装される能動素子部品と第2のグランド電極との距離が近接し、この間に生じるインダクタ成分を抑制できるとともに、多層基板内において異なる高周波回路を形成する第1、第2の回路電極群を多層基板内において上下方向に分離され、異なる高周波回路間の干渉を抑制でき、結果として高周波部品の電気特性を向上できるのである。
【0012】
【発明の実施の形態】
以下、本発明の一実施形態について図を用いて説明する。
【0013】
図1は、通信機器に用いられる高周波部品の一例で、携帯電話のアンテナ端に設けられて、アンテナ端子1を送信端子2或いは受信端子3へ切換接続する高周波スイッチ4と、その送信端子2側にローパスフィルタ5(以下、LPFと記す)を接続した高周波部品を示したものである。
【0014】
そして、高周波スイッチ4は主として能動素子の一種である電界効果トランジスタ(以下、FETと記す)を用いて形成したもので、送信側はアンテナ端子1と送信ポート6間に接続したFET7aと、このFET7aの送信ポート6側にFET7bを接続しコンデンサ8を介して接地し、各FET7a,7bのゲートに制御電圧の印加によりアンテナ端子1と送信ポート6間の導通をコントロールする。受信側も送信側と同様に2つのFET9a,9bとコンデンサ10により形成し、各FET9a,9bのゲートに制御電圧の印加によりアンテナ端子1と受信端子3間の導通をコントロールする。
【0015】
LPF5は送信端子2と送信ポート6間に設けられたインダクタ11と、このインダクタ11の両端部分をコンデンサ12を介して接地した構成とし、送信端子2の前段に設けられるアンプ(特に図示せず)の高次高調波成分を抑制している。
【0016】
そして、図2はこの高周波部品を具現化した構造を示したもので、基本的な構造は、複数の誘電体層13aからなる多層基板13上に図1に示すFET7a,7b,9a,9bを一体化した能動素子部品14を実装し、図1に示すコンデンサ8,10,12やインダクタ11の受動部品を回路電極15,16として多層基板13の内層部分に形成し、それらを適宜ビアホール17などの接続電極で接続し所定の高周波回路を形成するものである。
【0017】
そして、この高周波部品においては、高周波スイッチ4を形成する上で必要となる接地用のグランド電極18と、LPF5を形成する上で必要となる接地用のグランド電極19とを個別に形成し異なる誘電体層13a上に配置することで、互いのグランド電極18,19の独立性が高くなり高周波スイッチ4とLPF5という異なる高周波回路間におけるグランドを介しての干渉を抑制でき、結果として高周波部品の電気特性を向上できるのである。
【0018】
また、多層基板13において、LPF5を形成する複数の回路電極16で形成される回路電極群20を高周波スイッチ4を形成する複数の回路電極15で形成される回路電極群21より下層部分で形成したことで、多層基板13内において異なるLPF5を形成する回路電極群20と高周波スイッチ4を形成する回路電極群21を多層基板13内において上下方向に分離され、より高周波スイッチ4とLPF5間の干渉を抑制できるのである。
【0019】
さらに、LPF5を形成するグランド電極19を回路電極群20より下層側に形成し、高周波スイッチ4を形成するグランド電極18を回路電極群21より上層側に形成することで、能動素子部品14とこの能動素子部品14が図1に示すコンデンサ8,10を介して接続されるグランド電極18との距離が近接し、この間に生じるインダクタ成分を抑制でき、高周波部品の電気特性を向上できるのである。
【0020】
また、高周波スイッチ4を形成する回路電極群21と、LPF5を形成する回路電極群20との間に別途シールド電極22を形成することで、グランド電極18,19を多層基板13の上下部分に配置しても高周波スイッチ4とLPF5との干渉を抑制することが出来るのである。
【0021】
なお、この一実施形態においては高周波回路として高周波スイッチ4とLPF5を用いて説明したのであるが、本発明はこの実施形態に限られるものでなく受動素子と能動素子を組み合わせて形成できるものであれば同様の効果を奏するものである。
【0022】
【発明の効果】
以上のように、本発明によれば、特に多層基板の内層部分で複数の回路電極からなる第1の回路電極群により形成される第1の高周波回路と、多層基板に実装される能動素子部品と多層基板の内層部分で複数の回路電極からなる第2の回路電極群により形成される第2の高周波回路とからなる高周波部品において、それぞれの高周波回路を形成する接地用のグランド電極を、多層基板における異なる誘電体層上に形成したことで、異なる高周波回路間におけるグランド電極を介しての干渉を抑制でき、結果として高周波部品の電気特性を向上できるのである。
【図面の簡単な説明】
【図1】本発明の一実施形態における高周波部品を示す回路図
【図2】同高周波部品を模式的に示す断面図
【符号の説明】
13 多層基板
13a 誘電体層
14 能動素子部品
15,16 回路電極
18,19 グランド電極
20,21 回路電極群
22 シールド電極
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a high-frequency component mainly used for a communication device.
[0002]
[Prior art]
In recent years, as high-frequency components have been combined to design different high-frequency circuits such as high-frequency filters and high-frequency switches integrally, passive elements such as capacitors and inductors are formed in multilayer substrates, and active elements such as diodes and FETs are used. A configuration has been developed in which active element components are mounted on a multilayer substrate.
[0003]
Conventionally, in such a high-frequency component, a grounding capacitor provided for each high-frequency circuit has a circuit electrode formed inside the multilayer substrate opposed to a ground electrode provided for obtaining a shielding effect on the lower surface side of the multilayer substrate. It was formed by that.
[0004]
As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
[0005]
[Patent Document 1]
JP 2001-177434 A
[Problems to be solved by the invention]
However, even though a capacitor for grounding is formed, circuit electrodes forming different high-frequency circuits are connected to a common electrode (ground electrode), so that each high-frequency circuit is connected to the common electrode (ground electrode). The influence between the circuits has been exerted, and the electrical characteristics of the composite high-frequency component have been degraded.
[0007]
Then, this invention aims at solving such a problem and improving the electrical characteristics of a high frequency component.
[0008]
[Means for Solving the Problems]
In order to achieve this object, the invention according to claim 1 of the present invention is particularly directed to a first high-frequency circuit formed by a first circuit electrode group consisting of a plurality of circuit electrodes in an inner layer portion of a multilayer substrate; Each high-frequency circuit is formed by a high-frequency component including an active element component mounted on a substrate and a second high-frequency circuit formed by a second circuit electrode group including a plurality of circuit electrodes in an inner layer portion of the multilayer substrate. By forming the grounding ground electrodes on different dielectric layers of the multilayer substrate, interference between different high-frequency circuits via the ground electrodes can be suppressed, and as a result, the electrical characteristics of the high-frequency component can be improved.
[0009]
According to a second aspect of the present invention, in the multilayer substrate, the first and second circuit electrode groups are formed in lower layers than the second circuit electrode group, so that different high-frequency circuits are formed in the multilayer substrate. The two circuit electrode groups are separated vertically in the multilayer substrate, so that interference between different high-frequency circuits can be suppressed, and as a result, the electrical characteristics of the high-frequency component can be improved.
[0010]
According to a third aspect of the present invention, the first ground electrode is formed on the lower layer side of the first circuit electrode group, and the second ground electrode is formed on the upper layer side of the second circuit electrode group, particularly in the multilayer substrate. As a result, the distance between the active element component mounted on the multilayer substrate and the second ground electrode is short, and an inductor component generated therebetween can be suppressed. As a result, the electrical characteristics of the high-frequency component can be improved.
[0011]
According to a fourth aspect of the present invention, an active element component mounted on a multilayer substrate is formed by forming a shield electrode between a first circuit electrode group and a second circuit electrode group, particularly in a multilayer substrate. The distance from the second ground electrode is short, the inductor component generated therebetween can be suppressed, and the first and second circuit electrode groups forming different high-frequency circuits in the multilayer substrate are vertically separated in the multilayer substrate. Thus, interference between different high-frequency circuits can be suppressed, and as a result, the electrical characteristics of the high-frequency component can be improved.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 shows an example of a high-frequency component used in a communication device. The high-frequency switch 4 is provided at an antenna end of a mobile phone and switches an antenna terminal 1 to a transmission terminal 2 or a reception terminal 3. 1 shows a high-frequency component to which a low-pass filter 5 (hereinafter referred to as LPF) is connected.
[0014]
The high-frequency switch 4 is formed mainly by using a field-effect transistor (hereinafter referred to as an FET), which is a kind of active element. On the transmission side, an FET 7a connected between the antenna terminal 1 and the transmission port 6, and this FET 7a The FET 7b is connected to the transmission port 6 side of the transmission line 6 and grounded via the capacitor 8, and the conduction between the antenna terminal 1 and the transmission port 6 is controlled by applying a control voltage to the gates of the FETs 7a and 7b. The receiving side is also formed by two FETs 9a and 9b and a capacitor 10 similarly to the transmitting side, and the conduction between the antenna terminal 1 and the receiving terminal 3 is controlled by applying a control voltage to the gate of each FET 9a and 9b.
[0015]
The LPF 5 has a configuration in which an inductor 11 provided between the transmission terminal 2 and the transmission port 6 and both ends of the inductor 11 are grounded via the capacitor 12, and an amplifier (not shown in particular) provided before the transmission terminal 2 High-order harmonic components are suppressed.
[0016]
FIG. 2 shows a structure embodying this high-frequency component. The basic structure is such that the FETs 7a, 7b, 9a, 9b shown in FIG. 1 are formed on a multilayer substrate 13 composed of a plurality of dielectric layers 13a. The integrated active element parts 14 are mounted, and the passive parts of the capacitors 8, 10, 12 and the inductor 11 shown in FIG. 1 are formed on the inner layer part of the multilayer substrate 13 as the circuit electrodes 15, 16, and these are appropriately connected to the via holes 17, etc. To form a predetermined high-frequency circuit.
[0017]
In this high-frequency component, a grounding ground electrode 18 required for forming the high-frequency switch 4 and a grounding ground electrode 19 required for forming the LPF 5 are separately formed to form different dielectrics. By arranging them on the body layer 13a, the independence of the ground electrodes 18 and 19 from each other is enhanced, and interference between the high-frequency switch 4 and the LPF 5 via different grounds can be suppressed. The characteristics can be improved.
[0018]
In the multilayer substrate 13, the circuit electrode group 20 formed by the plurality of circuit electrodes 16 forming the LPF 5 is formed in a lower layer portion than the circuit electrode group 21 formed by the plurality of circuit electrodes 15 forming the high-frequency switch 4. As a result, the circuit electrode group 20 forming the different LPFs 5 and the circuit electrode group 21 forming the high-frequency switch 4 in the multilayer substrate 13 are separated in the vertical direction in the multilayer substrate 13 so that interference between the high-frequency switch 4 and the LPF 5 is reduced. It can be suppressed.
[0019]
Further, by forming the ground electrode 19 forming the LPF 5 below the circuit electrode group 20 and forming the ground electrode 18 forming the high-frequency switch 4 above the circuit electrode group 21, the active element component 14 and the The distance between the active element component 14 and the ground electrode 18 connected via the capacitors 8 and 10 shown in FIG. 1 is short, and it is possible to suppress an inductor component generated therebetween, thereby improving the electrical characteristics of the high-frequency component.
[0020]
Further, by separately forming the shield electrode 22 between the circuit electrode group 21 forming the high-frequency switch 4 and the circuit electrode group 20 forming the LPF 5, the ground electrodes 18 and 19 are arranged on the upper and lower portions of the multilayer substrate 13. Even so, interference between the high-frequency switch 4 and the LPF 5 can be suppressed.
[0021]
In this embodiment, the high-frequency switch 4 and the LPF 5 have been described as high-frequency circuits. However, the present invention is not limited to this embodiment, but may be any combination of passive elements and active elements. A similar effect can be achieved.
[0022]
【The invention's effect】
As described above, according to the present invention, a first high-frequency circuit formed by a first circuit electrode group including a plurality of circuit electrodes particularly in an inner layer portion of a multilayer substrate, and an active element component mounted on the multilayer substrate And a second high-frequency circuit formed by a second circuit electrode group formed of a plurality of circuit electrodes in the inner layer portion of the multilayer substrate. By forming them on different dielectric layers on the substrate, interference between different high-frequency circuits via the ground electrode can be suppressed, and as a result, the electrical characteristics of the high-frequency component can be improved.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing a high-frequency component according to an embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing the high-frequency component.
DESCRIPTION OF SYMBOLS 13 Multilayer board 13a Dielectric layer 14 Active element component 15, 16 Circuit electrode 18, 19 Ground electrode 20, 21 Circuit electrode group 22 Shield electrode

Claims (4)

複数の誘電体層から形成された多層基板と、この多層基板の内層部分で複数の回路電極からなる第1の回路電極群により形成される第1の高周波回路と、前記多層基板に実装される能動素子部品と前記多層基板の内層部分で複数の回路電極からなる第2の回路電極群により形成される第2の高周波回路とを備え、前記第1、第2の高周波回路はそれぞれ前記回路電極と対向し接地容量を形成するグランド電極を有するとともに、前記第1の高周波回路に接続される第1のグランド電極と前記第2の高周波回路に接続される第2のグランド電極を前記多層基板における異なる誘電体層上に形成したことを特徴とする高周波部品。A multilayer substrate formed from a plurality of dielectric layers, a first high-frequency circuit formed by a first circuit electrode group including a plurality of circuit electrodes in an inner layer portion of the multilayer substrate, and mounted on the multilayer substrate An active element component; and a second high-frequency circuit formed by a second circuit electrode group including a plurality of circuit electrodes in an inner layer portion of the multilayer substrate, wherein the first and second high-frequency circuits are respectively provided with the circuit electrodes A first ground electrode connected to the first high-frequency circuit and a second ground electrode connected to the second high-frequency circuit in the multilayer substrate. A high-frequency component formed on different dielectric layers. 多層基板において、第1の回路電極群を第2の回路電極群より下層部分で形成したことを特徴とする請求項1に記載の高周波部品。2. The high-frequency component according to claim 1, wherein the first circuit electrode group is formed in a lower layer portion of the second circuit electrode group in the multilayer substrate. 多層基板において、第1のグランド電極を前記第1の回路電極群より下層側に形成し、第2のグランド電極を前記第2の回路電極群より上層側に形成したことを特徴とする請求項2に記載の高周波部品。2. The multi-layer board according to claim 1, wherein a first ground electrode is formed below the first circuit electrode group, and a second ground electrode is formed above the second circuit electrode group. 3. The high-frequency component according to 2. 多層基板において、第1の回路電極群と、第2の回路電極群との間にシールド電極を形成したことを特徴とする請求項3に記載の高周波部品。The high-frequency component according to claim 3, wherein a shield electrode is formed between the first circuit electrode group and the second circuit electrode group in the multilayer substrate.
JP2003042830A 2003-02-20 2003-02-20 High frequency component Pending JP2004253639A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2006085465A1 (en) * 2005-02-10 2008-06-26 株式会社村田製作所 LC filter composite module
JP2011097134A (en) * 2009-10-27 2011-05-12 Murata Mfg Co Ltd High-frequency module
JP2013236242A (en) * 2012-05-09 2013-11-21 Murata Mfg Co Ltd Switch module

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2006085465A1 (en) * 2005-02-10 2008-06-26 株式会社村田製作所 LC filter composite module
JP2011097134A (en) * 2009-10-27 2011-05-12 Murata Mfg Co Ltd High-frequency module
US8558641B2 (en) 2009-10-27 2013-10-15 Murata Manufacturing Co., Ltd. High-frequency module
JP2013236242A (en) * 2012-05-09 2013-11-21 Murata Mfg Co Ltd Switch module
US9263780B2 (en) 2012-05-09 2016-02-16 Murata Manufacturing Co., Ltd. Switch module

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