JPS6251834A - Two-way distributor - Google Patents
Two-way distributorInfo
- Publication number
- JPS6251834A JPS6251834A JP19243585A JP19243585A JPS6251834A JP S6251834 A JPS6251834 A JP S6251834A JP 19243585 A JP19243585 A JP 19243585A JP 19243585 A JP19243585 A JP 19243585A JP S6251834 A JPS6251834 A JP S6251834A
- Authority
- JP
- Japan
- Prior art keywords
- input
- distribution
- terminals
- output terminal
- output
- 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
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は同軸を用いてツリー状に構成する通信ネットワ
ークを分配するための分配器に関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a distributor for distributing a communication network configured in a tree shape using coaxial cables.
従来の技術
従来の広帯域分配器はトランス結合型と、抵抗結合型の
２種類が存在する。トランス結合型４分配器の例を第３
図に示す。入出力端子１から入力される信号は先づ分配
トランスＴ１により２分配され、その出力が次段の分配
トランスＴ２ 、 Ｔ３によりさらに２分配されて分配
端子２よシ出力される。この分配器は分配端子間の結合
度が小さいという特徴がある。BACKGROUND OF THE INVENTION There are two types of conventional broadband dividers: transformer-coupled type and resistance-coupled type. The third example of a transformer-coupled four-way divider
As shown in the figure. A signal inputted from the input/output terminal 1 is first divided into two parts by the distribution transformer T1, and its output is further divided into two parts by the next-stage distribution transformers T2 and T3, and then outputted from the distribution terminal 2. This distributor is characterized by a low degree of coupling between distribution terminals.
抵抗結合型４分配器の従来例を第４図に示す。A conventional example of a resistance-coupled four-way divider is shown in FIG.
Ｒ１は分配用抵抗器で分配端子間の結合度を小さくしイ
ンピーダンスの整合を行なうだめのものである。R1 is a distribution resistor that is used to reduce the degree of coupling between distribution terminals and to match impedance.
発明が解決しようとする問題点
このような従来の回路方式の分配器では分配端子間の信
号伝送に損失が多く、分配端子間でも双方向伝送を行な
うツリー状通信ネットワークには使用することができな
い。また直流電源を重畳したネットワークにも使用する
ことができなかった。Problems to be Solved by the Invention In such a conventional circuit type distributor, there is a lot of loss in signal transmission between distribution terminals, and it cannot be used in a tree-like communication network that performs bidirectional transmission even between distribution terminals. . Furthermore, it could not be used in networks with superimposed DC power supplies.
本発明はこのような点を改善し簡単な構成で直流電源重
畳されたツリー状通信ネットワークの分配器を得るもの
である。The present invention improves these points and provides a distributor for a tree-like communication network in which DC power supplies are superimposed with a simple configuration.
問題点を解決するだめの手段
本発明は上記問題点を解決するため、すべての分配端子
間を抵抗により１対１に接続するとともに、入出力端子
および分配端子に直流をバイパスする回路を設けたもの
である。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention connects all the distribution terminals one-to-one using resistors, and provides a circuit for bypassing direct current at the input/output terminals and the distribution terminals. It is something.
作 用
本発明は上記の構成によりツリー型通信ネットワーク上
に重畳された直流電流を分配部を通さずバイパスすると
ともに、分配端子相互間の結合度を大きくし、入出力端
子および各分配端子相互間を、インピーダンス整合良く
、双方向伝送が可能になる。Effect of the Invention The present invention uses the above-described configuration to bypass the direct current superimposed on the tree-type communication network without passing it through the distribution section, and increases the degree of coupling between the distribution terminals, thereby increasing the degree of coupling between the input/output terminals and each distribution terminal. With good impedance matching, bidirectional transmission becomes possible.
実施例
力端子Ｂ、５は入出力端子Ｃ５Ｒ２，Ｒ３，Ｒ４は分配
抵抗、Ｌｌ、Ｌ２．Ｌ３はチョークコイル、ＣＩ、Ｃ２
，Ｃ３は低周波信号遮断用コンデンサである。本実施例
においては入出力端子と分配端子は同等であシ区別はな
い。Example power terminals B, 5 are input/output terminals C5, R2, R3, R4 are distribution resistors, Ll, L2 . L3 is choke coil, CI, C2
, C3 are capacitors for blocking low frequency signals. In this embodiment, the input/output terminals and the distribution terminals are the same and there is no distinction between them.
入出力端子Ａ３よシ入力された信号のうち重畳された直
流電源、低周波信号成分はチョークコイルＬ１．Ｌ２を
通り入出力端子Ｂ４、入出力端子Ｃ６に取シ出される。The superimposed DC power and low frequency signal components of the signals input through the input/output terminal A3 are sent to the choke coil L1. It passes through L2 and is taken out to input/output terminal B4 and input/output terminal C6.
高周波信号成分はチョークコイルでは遮断され、分配抵
抗Ｒ２、Ｒ３により分配されて、入出力端子Ｂ、入出力
端子Ｃより取り出される。他の端子から入力された信号
も同様に分配され各入出力端子間で信号を双方向に伝送
することができる。The high frequency signal component is blocked by the choke coil, distributed by the distribution resistors R2 and R3, and taken out from the input/output terminal B and the input/output terminal C. Signals input from other terminals are similarly distributed, and signals can be transmitted bidirectionally between each input/output terminal.
本分配器の分配損失ＤＬＯ３Ｓ （ｄＢ ）は、ＤＬＯ
３Ｓ 帽ｏ Ｌ ０（Ｊｌ ０ Ｆ １ｏ １ ｏｑｌ
ｏ（４＋１）・・・（１）で定在波比ＶＳＷＲはＲ＜Ｒ
Ｎの場合
つ
となる。ここで〜は本分配器のノミナルインピーダンス
で、Ｒは分配抵抗Ｒ２、Ｒｓ 、Ｒ４の値であシこの場
合
Ｒ２＝Ｒ３＝１４ ＝Ｒ
である。The distribution loss DLO3S (dB) of this distributor is DLO
3S hat o L 0 (Jl 0 F 1o 1 oql
o(4+1)...(1), standing wave ratio VSWR is R<R
In case of N, it becomes one. Here, ~ is the nominal impedance of the present distributor, and R is the value of the distribution resistors R2, Rs, and R4. In this case, R2=R3=14=R.
以下に具体的な一般計例を示す。ノミナルインピーダン
ス７５Ωで分配損失４ｄＢの分配器を作ろうとすれば（
１） 、 （２）式よりＲ：１９．２Ω
ＶＳＷＲ：１．５９
となる。Specific examples of general totals are shown below. If you want to make a divider with a nominal impedance of 75Ω and a distribution loss of 4dB, (
1) From formula (2), R: 19.2Ω VSWR: 1.59.
次に他の実施例を示す。Next, another example will be shown.
第２図は５個の入出力端子を持つ双方向分配器の回路図
である。一般にｎ＋１個の入出力端子を持つ分配器の分
配損失ＤＬＯ８Ｓと定在波比ＶＳＷＲは次の式で与えら
れる。FIG. 2 is a circuit diagram of a bidirectional distributor having five input/output terminals. Generally, the distribution loss DLO8S and standing wave ratio VSWR of a divider having n+1 input/output terminals are given by the following equations.
ＤＬｏｓｓ＝−１ｏｌｏｃ、、ｉ＋１ｏｘ （Ｒ＋
１）、、、（、Ｊｑ１ｏＲｎ
ＶＳＷＲ＝ ｎ／ （ｆｎ＋ １ ）
ただしＲ＜Ｒｎの場合 ・・・・・・・・・・・・・・
・・・・・・・・・・（４）（３）式の右辺第１項は分
配器内での損失がない場合の理想的分配損失であり、第
２項は分配器による損失である。本実施例において定在
波比２以内で双方向性分配器を構成する時、分配抵抗Ｒ
および分配損失ＤＬＯ３Ｓ
Ｒ＝７５Ω
ＤＬＯ３Ｓ ＝ ９．０ ｄＢ
となる。本実施においても入出力端子１から入った直流
信号や低周波信号は入力端子１に入っているＣとＬによ
シ分波され他の入出力端子間と双方向に伝送できる。DLoss=-1oloc,, i+1ox (R+
1),,, (, Jq1oRn VSWR= n/ (fn+ 1) However, in the case of R<Rn...
・・・・・・・・・・・・(4) The first term on the right side of equation (3) is the ideal distribution loss when there is no loss within the distributor, and the second term is the loss due to the distributor. . In this embodiment, when configuring a bidirectional divider with a standing wave ratio of 2 or less, the distribution resistance R
And the distribution loss DLO3S R=75Ω DLO3S = 9.0 dB. Also in this embodiment, a DC signal or a low frequency signal input from the input/output terminal 1 is split by C and L input to the input terminal 1, and can be transmitted bidirectionally between the other input/output terminals.
尚、４個の入出力端子を持つ３分配の双方向分配器も同
様に構成することができる。Note that a three-way bidirectional distributor having four input/output terminals can be constructed in the same manner.
発明の効果
以上述べてきたように、本発明によれば、簡単な回路構
成で双方向性分配器を構成することができる。Effects of the Invention As described above, according to the present invention, a bidirectional distributor can be configured with a simple circuit configuration.
第１図は本発明の一実施例における双方向性分配器の回
路図、第２図は他の実施例における回路図、第３図、第
４図は従来例の回路図である。
１・・・・・・入出力端子、２・・・・・・分配端子、
３・・・・・・入出力端子Ａ、４・・・・・・入出力端
子Ｂ、５・・・・・・入出力端子Ｃ５Ｒ２，Ｒ３，Ｒ４
・・・・・・分配抵抗、Ｌｌ。
Ｌ２ 、Ｌｓ・・・・・・チョークコイル、ＣＩ、Ｃ２
，Ｃ３・・・・・・低周波信号遮断用コンデンサ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名 。FIG. 1 is a circuit diagram of a bidirectional divider according to one embodiment of the present invention, FIG. 2 is a circuit diagram of another embodiment, and FIGS. 3 and 4 are circuit diagrams of a conventional example. 1...Input/output terminal, 2...Distribution terminal,
3... Input/output terminal A, 4... Input/output terminal B, 5... Input/output terminal C5R2, R3, R4
...Distribution resistance, Ll. L2, Ls...Choke coil, CI, C2
, C3... Capacitor for blocking low frequency signals. Name of agent: Patent attorney Toshio Nakao and one other person.
Claims (2)
と他のｎ−１個の入出力端子との間をそれぞれ抵抗を介
して接続した双方向性分配器。(1) A bidirectional distributor that has n input/output terminals and connects one input/output terminal to the other (n-1) input/output terminals via resistors.
デンサの未接続端を混合入出力端子とするととともに、
ｎ個の混合入出力端子間をチョークコイルを用いて接続
した特許請求の範囲第１項記載の双方向性分配器。(2) Connect a capacitor to each input/output terminal, and use the unconnected end of the capacitor as a mixed input/output terminal,
2. The bidirectional distributor according to claim 1, wherein n mixed input/output terminals are connected using a choke coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19243585A JPS6251834A (en) | 1985-08-30 | 1985-08-30 | Two-way distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19243585A JPS6251834A (en) | 1985-08-30 | 1985-08-30 | Two-way distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6251834A true JPS6251834A (en) | 1987-03-06 |
Family
ID=16291259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19243585A Pending JPS6251834A (en) | 1985-08-30 | 1985-08-30 | Two-way distributor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6251834A (en) |
-
1985
- 1985-08-30 JP JP19243585A patent/JPS6251834A/en active Pending
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