JPH05275905A - Packaging structure of branching filter - Google Patents
Packaging structure of branching filterInfo
- Publication number
- JPH05275905A JPH05275905A JP6723892A JP6723892A JPH05275905A JP H05275905 A JPH05275905 A JP H05275905A JP 6723892 A JP6723892 A JP 6723892A JP 6723892 A JP6723892 A JP 6723892A JP H05275905 A JPH05275905 A JP H05275905A
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- filter
- filters
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、無線機等に搭載され、
異った周波数の信号を周波数に応じて分離又は合成する
ために使用する分波器の実装構造に関するものである。BACKGROUND OF THE INVENTION The present invention is mounted on a wireless device,
The present invention relates to a duplexer mounting structure used for separating or synthesizing signals having different frequencies according to frequencies.
【０００２】[0002]
【従来の技術】従来、このような分野の技術としては、
例えば、特開昭６２−１３６１０４号、特開昭６２−１
３６１０５号に記載されるものがあった。2. Description of the Related Art Conventionally, as a technique in such a field,
For example, JP-A-62-136104 and JP-A-62-1
There was one described in No. 36105.
【０００３】以下、その構成を図を用いて説明する。図
７はかかる従来の分波器の構成図であり、図７（ａ）は
その分波器の斜視図、図７（ｂ）はその裏面斜視図であ
る。The structure will be described below with reference to the drawings. FIG. 7 is a configuration diagram of such a conventional duplexer, FIG. 7 (a) is a perspective view of the duplexer, and FIG. 7 (b) is a rear perspective view thereof.
【０００４】この分波器はアルミナ、ガラスエポキシ等
の絶縁性基板１を備え、その基板１の上面及び下面には
厚膜印刷やメッキ処理等によって複数個の入出力端子部
３とアースパターン２とが形成されている。基板１の上
下面に設けられた複数個の入出力端子部３は、上下面接
続用のスルーホールによって相互に接続されている。基
板１の上面には、中心周波数の異なる２個の送信誘電体
フィルタ（以下、送信用フィルタという）６、受信誘電
体フィルタ（以下、受信用フィルタという）７が直接搭
載されている。This duplexer comprises an insulating substrate 1 made of alumina, glass epoxy or the like, and a plurality of input / output terminal portions 3 and a ground pattern 2 are formed on the upper and lower surfaces of the substrate 1 by thick film printing or plating. And are formed. The plurality of input / output terminal portions 3 provided on the upper and lower surfaces of the substrate 1 are connected to each other by through holes for connecting upper and lower surfaces. Two transmission dielectric filters (hereinafter, referred to as transmission filters) 6 and reception dielectric filters (hereinafter, referred to as reception filters) 7 having different center frequencies are directly mounted on the upper surface of the substrate 1.
【０００５】なお、これらのフィルタ６，７は、例え
ば、本願出願人が先に出願した特願昭５９−２０１４５
５号に記載されているように、均質で単体の誘電体から
なるブロック状のフィルタ本体４，５と、このフィルタ
本体４，５内に所定間隔で埋設された円柱状の中心導体
からなる複数個の誘電体共振器８，１２と、この各誘電
体共振器８，１２の中心導体に接続され、フィルタ本体
４，５の一側面に形成された複数個の周波数調整パター
ンの９，１３を備え、各両側端には入出力端子部３、ス
ルーホールに接続するための入出力電極１０，１１，１
４，１５が備えられている。また、各誘電体共振器の共
振周波数は各誘電体共振器の高さ及び周波数調整パター
ンにより決定され、この調整は機械的な工法、或いは光
学的工法等により行われる。These filters 6 and 7 are disclosed in, for example, Japanese Patent Application No. 59-20145 previously filed by the applicant of the present application.
As described in No. 5, a plurality of block-shaped filter bodies 4 and 5 which are homogeneous and consist of a single dielectric body, and cylindrical center conductors which are embedded in the filter bodies 4 and 5 at predetermined intervals. Each of the dielectric resonators 8 and 12 and a plurality of frequency adjustment patterns 9 and 13 connected to the center conductor of each of the dielectric resonators 8 and 12 and formed on one side surface of the filter bodies 4 and 5. I / O terminals 3, 11 and 1 for connecting to the I / O terminal portion 3 and through holes at each end.
4, 15 are provided. The resonance frequency of each dielectric resonator is determined by the height and frequency adjustment pattern of each dielectric resonator, and this adjustment is performed by a mechanical construction method or an optical construction method.
【０００６】基板１の下面には、ストリップ線路等の分
布定数線路からなる一対の分波回路１６，１７と、この
分波回路１６，１７に接続されたスプリアス除去用低減
通過フィルタ１８とが、厚膜印刷やメッキ処理等で形成
されている。各分波回路１６，１７は入出力端子部３、
入出力電極１０，１１，１４，１５を介して上面の各フ
ィルタ６，７にそれぞれ接続されている。On the lower surface of the substrate 1, there are provided a pair of demultiplexing circuits 16 and 17 formed of distributed constant lines such as strip lines, and a spurious eliminating reduction pass filter 18 connected to the demultiplexing circuits 16 and 17. It is formed by thick film printing or plating. Each demultiplexing circuit 16 and 17 includes an input / output terminal unit 3,
The filters 6 and 7 on the upper surface are connected via the input / output electrodes 10, 11, 14, and 15, respectively.
【０００７】ここで直列接続された一方の分波回路１６
及び受信用フィルタ７と、直列接続された他方の分波回
路１７及び送信用フィルタ６とは相互に影響がないよう
にするために、一方の分波回路１６及び受信用フィルタ
７の通過域中心周波数において、他方の分波回路１７及
び受信用フィルタ６の入力インピーダンスが充分高くな
らなければならない。そのために、各分波回路１６，１
７の線路長は次のようにして決定される。One branching circuit 16 connected in series here.
In order to prevent the reception filter 7 and the other demultiplexing circuit 17 and the transmission filter 6 connected in series from affecting each other, the pass band center of the one demultiplexing circuit 16 and the reception filter 7 At the frequency, the input impedance of the other branching circuit 17 and the receiving filter 6 must be sufficiently high. Therefore, each demultiplexing circuit 16, 1
The line length of No. 7 is determined as follows.
【０００８】分波回路１７と送信用フィルタ６の縦続接
続の場合を考える。この場合のＳ行列のＳ11は次式で与
えられる。Consider a case where the demultiplexing circuit 17 and the transmission filter 6 are connected in cascade. S 11 of the S matrix in this case is given by the following equation.
【０００９】 Ｓ11（１）＝〔ｒｃｏｓθ−ｃｏｓθ＋ｚｓｉｎθ＋ｊ（ｓｉｎθ ＋ｚｃｏｓθ−ｒｓｉｎθ）〕／〔ｒｃｏｓθ＋ｃｏｓθ −ｚｓｉｎθ＋ｊ（ｓｉｎθ＋ｚｃｏｓθ＋ｒｓｉｎθ）〕 …（１） ここで、θ＝βｌ，β＝２π／λ，ｌ＝分波回路１７の
線路長、送信用フィルタの入力インピーダンス＝ｒ＋ｊ
ｚである。S 11 (1) = [rcos θ−cos θ + z sin θ + j (sin θ + z cos θ−r sin θ)] / [r cos θ + cos θ−z sin θ + j (sin θ + z cos θ + r sin θ)] (1) where θ = β 1, β = 2π / λ, l Line length of circuit 17, input impedance of transmission filter = r + j
z.
【００１０】直列接続された分波回路１７と送信用フィ
ルタ６の入力インピーダンスが受信用フィルタ７の通過
域において、充分高くなるためには、前記した式（１）
のＳ11（１）が最小になればよい。即ち、 ｃｏｓθ＝ｚｓｉｎθ …（２） になるようにθを選べばよいことがわかる。この場合、
前記式（１）は次のようになる。In order for the input impedance of the branching circuit 17 and the transmission filter 6 connected in series to be sufficiently high in the pass band of the reception filter 7, the above-mentioned equation (1) is required.
It suffices that S 11 (1) of is minimized. That is, it is understood that θ should be selected so that cos θ = z sin θ (2). in this case,
The equation (1) is as follows.
【００１１】 Ｓ11（１）＝〔ｒｃｏｓθ＋ｊ（ｓｉｎθ＋ｚ2 ｓｉｎθ −ｒｓｉｎθ）〕／〔ｒｃｏｓθ＋ｊ（ｓｉｎθ ＋ｚ2 ｓｉｎθ＋ｒｓｉｎθ）〕 …（３） ここで、上式を入力インピーダンス（Ｚｉｎ）で表現す
ると次のようになる。S 11 (1) = [rcos θ + j (sin θ + z 2 sin θ−r sin θ)] / [r cos θ + j (sin θ + z 2 sin θ + r sin θ)] (3) Here, the above expression can be expressed by the input impedance (Zin) become.
【００１２】 Ｚｉｎ＝〔（１＋Ｚ2 ）／ｒ〕−ｊｚ …（４） 即ち、直列接続された分波回路１７と送信用フィルタ６
の入力インピーダンスは直列接続された分波回路１６と
受信用フィルタ７の通過帯域において充分入力インピー
ダンスが高くなければならない。Zin = [(1 + Z 2 ) / r] -jz (4) That is, the branching circuit 17 and the transmission filter 6 connected in series.
The input impedance of must be sufficiently high in the pass band of the branching circuit 16 and the receiving filter 7 connected in series.
【００１３】従って、直列接続された分波回路１７と送
信用フィルタ６は減衰域となる。この場合、前記式
（４）において、ｒ≪１となると考えてよい。よって前
記式（４）はＺｉｎ≫１となり、お互いに影響はなくな
る。また、Ｚｉｎの位相角は前記式（４）において、実
数部が充分大きくなるため零とならなければならないこ
とがわかる。Therefore, the branching circuit 17 and the transmission filter 6 connected in series are in the attenuation range. In this case, it may be considered that r << 1 in the equation (4). Therefore, the above formula (4) becomes Zin >> 1, and there is no influence on each other. Also, it can be seen that the phase angle of Zin must be zero because the real part is sufficiently large in the equation (4).
【００１４】[0014]
【発明が解決しようとする課題】しかしながら、上述の
分波器の実装構造では、λ／４長誘電体共振器で構成さ
れる送信用フィルタ６と受信用フィルタ７は、その開放
面２０，２１がほぼ同一方向面になるように隣接して基
板１に搭載されているので、該送信用フィルタ６と受信
用フィルタ７との間に電磁気学的に不必要な結合が生
じ、このため分波器の性能が劣化するという問題点があ
った。However, in the mounting structure of the duplexer described above, the transmission filter 6 and the reception filter 7 formed of the λ / 4 long dielectric resonator have open surfaces 20, 21. Are mounted on the substrate 1 so as to be adjacent to each other so as to be substantially in the same direction, electromagnetically unnecessary coupling occurs between the transmitting filter 6 and the receiving filter 7, and thus the demultiplexing is performed. There was a problem that the performance of the vessel deteriorates.
【００１５】本発明は、上記問題点を解決するためにな
されたものであって、送信用フィルタと受信用フィルタ
とを、その開放面が同一方向面にならないように基板上
に搭載し、不必要な結合を最小に抑えた分波器の実装構
造を提供することを目的とする。The present invention has been made in order to solve the above-mentioned problems, in which a transmitting filter and a receiving filter are mounted on a substrate so that their open surfaces are not in the same direction. It is an object of the present invention to provide a mounting structure of a demultiplexer in which required coupling is minimized.
【００１６】[0016]
【課題を解決するための手段】本発明は上記目的を達成
するため、開放面を有する送信用フィルタと、開放面を
有する受信用フィルタと、前記送信用フィルタおよび受
信用フィルタに接続された分波回路とからなる分波器の
実装構造において、前記送信用フィルタと受信用フィル
タを、前記各開放面が同一方向面にならないように配置
したものである。In order to achieve the above object, the present invention has a transmitting filter having an open surface, a receiving filter having an open surface, and a component connected to the transmitting filter and the receiving filter. In a mounting structure of a demultiplexer including a wave circuit, the transmitting filter and the receiving filter are arranged so that the open surfaces do not become surfaces in the same direction.
【００１７】[0017]
【作用】送信用フィルタと受信用フィルタの開放面にお
ける電気力線による干渉を抑え、不必要な結合を最小に
することができる。It is possible to suppress the interference due to the lines of electric force on the open surfaces of the transmitting filter and the receiving filter and minimize unnecessary coupling.
【００１８】[0018]
【実施例】図１は本発明の実施例の分波器を示す斜視図
である。この分岐器は送信用誘電体フィルタ１００，受
信用誘電体フィルタ１０１および分波基板１０２を同一
面上に配置し、相互の間を図２に示すように接続したも
のである。1 is a perspective view showing a duplexer according to an embodiment of the present invention. In this branching device, a dielectric filter for transmission 100, a dielectric filter for reception 101, and a demultiplexing substrate 102 are arranged on the same plane, and they are connected to each other as shown in FIG.
【００１９】送信用誘電体フィルタ１００および受信用
誘電体フィルタ１０１は共に直方体の誘電体ブロックに
４個の誘電体共振器を設けたもので、送信用誘電体フィ
ルタ１００は図３に示す等価回路で現わされるように通
過帯域の上部減衰域に減衰極を２個有する有極型誘電体
フィルタであり、受信用誘電体フィルタ１０１は図４に
示す等価回路で現わされるように通過帯域の下部減衰域
に減衰極を２個有する有極型誘電体フィルタである。Each of the transmitting dielectric filter 100 and the receiving dielectric filter 101 is a rectangular parallelepiped dielectric block provided with four dielectric resonators. The transmitting dielectric filter 100 is equivalent to the circuit shown in FIG. Is a polar type dielectric filter having two attenuation poles in the upper attenuation band of the pass band, and the receiving dielectric filter 101 is a pass filter as shown in the equivalent circuit of FIG. A polarized dielectric filter having two attenuation poles in the lower attenuation region of the band.
【００２０】また、上記の送信用誘電体フィルタ１０
０，受信用誘電体フィルタ１０１は、ＴＸ端１０８，Ｒ
Ｘ端１０７を設けた開放面１０３，開放面１０４を除く
他の全ての面がメッキ等の導電体膜により覆われてい
て、接地電位になっている。Further, the above-mentioned transmission dielectric filter 10 is used.
0, the dielectric filter 101 for reception is the TX end 108, R
All the surfaces except the open surface 103 and the open surface 104 provided with the X end 107 are covered with a conductive film such as plating, and are at the ground potential.
【００２１】分波器１０２は図７（ｂ）に示す分波回路
と同様の機能を備えたストリップラインによる分波回路
を有し、送信用誘電体フィルタ１００と受信用誘電体フ
ィルタ１０１とを相互に干渉を及ぼさないようにアンテ
ナへ接続するものである。The demultiplexer 102 has a stripline demultiplexing circuit having the same function as that of the demultiplexing circuit shown in FIG. 7B, and includes a transmitting dielectric filter 100 and a receiving dielectric filter 101. The antennas are connected so that they do not interfere with each other.
【００２２】本実施例では、上記の送信用誘電体フィル
タ１００と受信用誘電体フィルタ１０１とを図１に示す
ように、その側面１０５と側面１０６とが向き合うよう
に同一基板上に搭載している。すなわち、前記基板に対
する占有面積が最小となる範囲内において、その開放面
１０３と開放面１０４とが別々の面で逆方向になるよう
に、つまり、同一方向面にならないように配置してあ
る。In this embodiment, as shown in FIG. 1, the transmitting dielectric filter 100 and the receiving dielectric filter 101 are mounted on the same substrate so that their side surfaces 105 and 106 face each other. There is. That is, the open surface 103 and the open surface 104 are arranged on different surfaces in opposite directions, that is, not in the same direction, within the range where the area occupied by the substrate is minimum.
【００２３】従って、本実施例における送信用誘電体フ
ィルタ１００と受信用誘電体フィルタ１０１の電気力線
は図５（ｂ）に示す状態になる。これに対して、図７に
示すように開放面２０と開放面２１とが同一方向面にあ
るように配置した従来例においては、送信用フィルタ６
と受信用フィルタ７の電気力線は、図５（ａ）に示す状
態になる。この図５（ａ），（ｂ）から分かるように、
本実施例によれば電位が最も高い開放面１０３と開放面
１０４の電気力線の干渉は従来例に比較して大幅に少く
なり、これにより特にスプリアス特性が大幅に改善され
る。Therefore, the lines of electric force of the transmitting dielectric filter 100 and the receiving dielectric filter 101 in this embodiment are in the state shown in FIG. 5 (b). On the other hand, in the conventional example in which the open surface 20 and the open surface 21 are arranged in the same direction as shown in FIG.
The electric lines of force of the receiving filter 7 are in the state shown in FIG. As can be seen from FIGS. 5 (a) and 5 (b),
According to the present embodiment, the interference of the lines of electric force between the open surface 103 and the open surface 104, which have the highest electric potential, is significantly reduced as compared with the conventional example, and in particular, the spurious characteristics are greatly improved.
【００２４】図６（ｂ）は８００ＭＨｚ帯分波器のスプ
リアス特性（受信用フィルタの場合）の一例を示すもの
であり、本実施例を適用した分波器のスプリアス特性Ｂ
は従来例の分波器のスプリアス特性Ａに比較して大幅に
改善されることが分る。なお、上記の受信用フィルタの
通過帯域は９１７〜９５０ＭＨｚ，減衰帯域は８７２〜
９０５ＭＨｚであり、その減衰特性は図６（ａ）に示す
ようになっている。FIG. 6 (b) shows an example of the spurious characteristic of the 800 MHz band demultiplexer (in the case of a receiving filter), and the spurious characteristic B of the demultiplexer to which this embodiment is applied.
Is significantly improved as compared with the spurious characteristic A of the conventional duplexer. The pass band of the reception filter is 917 to 950 MHz, and the attenuation band is 872 to 872.
It is 905 MHz, and its attenuation characteristic is as shown in FIG.
【００２５】なお、本実施例は送信用フィルタおよび受
信用フィルタとして誘電体フィルタを使用した場合であ
るが、同一構造の他フィルタにも適用することができ
る。In this embodiment, the dielectric filter is used as the transmitting filter and the receiving filter, but the present invention can be applied to other filters having the same structure.
【００２６】[0026]
【発明の効果】以上、詳細に説明したように本発明によ
れば、分波器を構成する送信用フィルタと受信用フィル
タの各開放面を同一方向面にならないように配置したの
で、不必要な結合を最小限に抑えることができ、従っ
て、特にスプリアス特性を大幅に改善することができ
る。As described above in detail, according to the present invention, the open faces of the transmitting filter and the receiving filter constituting the duplexer are arranged so as not to be in the same direction, which is unnecessary. Coupling can be minimized, and thus spurious characteristics can be significantly improved.
【図１】本発明の実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.
【図２】図１に示す分波器のブロック図である。FIG. 2 is a block diagram of the duplexer shown in FIG.
【図３】図１に示す送信用誘電体フィルタの等価回路を
示す図である。FIG. 3 is a diagram showing an equivalent circuit of the transmitting dielectric filter shown in FIG.
【図４】図１に示す受信用誘電体フィルタの等価回路を
示す図である。4 is a diagram showing an equivalent circuit of the receiving dielectric filter shown in FIG.
【図５】分波器における電気力線の状態を示す図であ
る。FIG. 5 is a diagram showing a state of lines of electric force in the duplexer.
【図６】誘電体フィルタの特性を示す図である。FIG. 6 is a diagram showing characteristics of a dielectric filter.
【図７】従来の分波器の構成図である。FIG. 7 is a configuration diagram of a conventional duplexer.
１００ 送信用誘電体フィルタ １０１ 受信用誘電体フィルタ １０２ 分波基板 100 Transmission Dielectric Filter 101 Reception Dielectric Filter 102 Demultiplexing Substrate
フロントページの続き (72)発明者 安岡 敏一 東京都港区虎ノ門１丁目７番12号 沖電気 工業株式会社内Continued Front Page (72) Inventor Toshikazu Yasuoka 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd.
Claims (1)
面を有する受信用フィルタと、前記送信用フィルタおよ
び受信用フィルタに接続された分波回路とからなる分波
器の実装構造において、 前記送信用フィルタと受信用フィルタを、前記各開放面
が同一方向面にならないように配置することを特徴とす
る分波器の実装構造。1. A duplexer mounting structure comprising a transmission filter having an open surface, a reception filter having an open surface, and a branching circuit connected to the transmission filter and the reception filter, A duplexer mounting structure, wherein a transmitting filter and a receiving filter are arranged such that the open surfaces do not face in the same direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6723892A JPH05275905A (en) | 1992-03-25 | 1992-03-25 | Packaging structure of branching filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6723892A JPH05275905A (en) | 1992-03-25 | 1992-03-25 | Packaging structure of branching filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05275905A true JPH05275905A (en) | 1993-10-22 |
Family
ID=13339140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6723892A Pending JPH05275905A (en) | 1992-03-25 | 1992-03-25 | Packaging structure of branching filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05275905A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE33181E (en) * | 1981-02-03 | 1990-03-13 | Hitachi, Ltd. | Data transmission system adapted to facilitate detection of safe receipt of a transmitted data frame by a receiving station |
| JPH07321508A (en) * | 1994-05-26 | 1995-12-08 | Nippon Dengiyou Kosaku Kk | Band pass filter and multicoupler employing the same |
| US6879222B2 (en) * | 2002-02-14 | 2005-04-12 | Cts Corporation | Reduced length metallized ceramic duplexer |
| JP2010239413A (en) * | 2009-03-31 | 2010-10-21 | Ube Ind Ltd | Dielectric transmitter-receiver |
| US8294532B2 (en) | 2008-12-09 | 2012-10-23 | Cts Corporation | Duplex filter comprised of dielectric cores having at least one wall extending above a top surface thereof for isolating through hole resonators |
| US9030272B2 (en) | 2010-01-07 | 2015-05-12 | Cts Corporation | Duplex filter with recessed top pattern and cavity |
| US9030275B2 (en) | 2008-12-09 | 2015-05-12 | Cts Corporation | RF monoblock filter with recessed top pattern and cavity providing improved attenuation |
| US9030276B2 (en) | 2008-12-09 | 2015-05-12 | Cts Corporation | RF monoblock filter with a dielectric core and with a second filter disposed in a side surface of the dielectric core |
-
1992
- 1992-03-25 JP JP6723892A patent/JPH05275905A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE33181E (en) * | 1981-02-03 | 1990-03-13 | Hitachi, Ltd. | Data transmission system adapted to facilitate detection of safe receipt of a transmitted data frame by a receiving station |
| JPH07321508A (en) * | 1994-05-26 | 1995-12-08 | Nippon Dengiyou Kosaku Kk | Band pass filter and multicoupler employing the same |
| US6879222B2 (en) * | 2002-02-14 | 2005-04-12 | Cts Corporation | Reduced length metallized ceramic duplexer |
| US8294532B2 (en) | 2008-12-09 | 2012-10-23 | Cts Corporation | Duplex filter comprised of dielectric cores having at least one wall extending above a top surface thereof for isolating through hole resonators |
| US9030275B2 (en) | 2008-12-09 | 2015-05-12 | Cts Corporation | RF monoblock filter with recessed top pattern and cavity providing improved attenuation |
| US9030276B2 (en) | 2008-12-09 | 2015-05-12 | Cts Corporation | RF monoblock filter with a dielectric core and with a second filter disposed in a side surface of the dielectric core |
| JP2010239413A (en) * | 2009-03-31 | 2010-10-21 | Ube Ind Ltd | Dielectric transmitter-receiver |
| US9030272B2 (en) | 2010-01-07 | 2015-05-12 | Cts Corporation | Duplex filter with recessed top pattern and cavity |
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