JPH02237208A - Vector composite type amplitude equalizer - Google Patents

Abstract

PURPOSE:To obtain a vector composite type amplitude equalizer which is stable, inexpensive and which has less trouble for executing equalization by constituting the equalizer by means of a distributor, a composite unit, an attenuator, and a delay cable and specifying the delay time of the delay cable. CONSTITUTION:At the time of desiring a characteristic curve for attenuation vs. frequency which decreases with the increase of the frequency (abbreviated as decreasing toward the right), the distributor 1 is set to be an in-phase (or antiphase) type and the composite unit 2 to be the antiphase (or in-phase) type. When the center frequency of the transmission band of an input signal is set to be fm, the delay time tau1 of the delay cable 4 is set to be tau1 1/(0.8fm). At the time of desiring a characteristic curve increasing toward the right, both the distributor 1 and the composite unit 2 are set to be the in-phase type or the anti-phase type, and the delay time tau2 of the delay cable 4 is set to be tau2 1/(1.2fm). Since equalizing characteristic changes by varying the attenuation quantity of the attenuator 3, it does not take trouble to decide the equalizing characteristic. Since the equalizer can be constituted by the distributor 1, the composite unit 2, the attenuator 3 and the delay cable 4, the stable and inexpensive vector composite type amplitude equalizer can be obtained.

Description

【発明の詳細な説明】 〔概　要〕 減衰周波数特性を補償する振幅等化器に関し、安価で、
等化特性を決定するのに手間がかからず、安定なベクト
ル合成型振幅等化器の提供を目的とし、 人力信号を２分する分配器の一方の出力を、遅延ケーブ
ルを通して遅延経路として合成器の一方の入力端子に入
力し、該分配器の他方の出力を直接経路にて該合成器の
他方の入力端子に入力し、該該合成器の出力より合成さ
れた信号を出力するようにすると共に、上記遅延経路又
は直接経路の何れか一方に減衰器を挿入しておき、 右下がりの特性を所望する時は、該分配器を同相（又は
逆相）型、該合成器を逆相（又は同相）型とし、入力信
号の伝送帯域の中心周波数をｆｍとする時、該遅延ケー
ブルの遅延時間τ１を、τ１＃１／　（０．　　８ｆ　
，　）とし、右上がりの特性を所望する時は、該分配器
及び該合成器を両者共同相型又は逆相型とし、該遅延ケ
ーブルの遅延時間τ２を、τ２’；１／　（１．２ｆ　
，）とずるように構成する。[Detailed Description of the Invention] [Summary] This invention relates to an amplitude equalizer that compensates for attenuation frequency characteristics, which is inexpensive and
The aim is to provide a stable vector synthesis type amplitude equalizer that does not require much effort to determine equalization characteristics.One output of a divider that divides a human signal into two is synthesized as a delay path through a delay cable. input to one input terminal of the divider, input the other output of the divider via a direct path to the other input terminal of the combiner, and output a combined signal from the output of the combiner. At the same time, an attenuator is inserted in either the delay path or the direct path, and when a downward-sloping characteristic is desired, the divider is of the in-phase (or anti-phase) type, and the combiner is of the anti-phase type. (or in-phase) type, and the center frequency of the transmission band of the input signal is fm, the delay time τ1 of the delay cable is τ1#1/(0.8f
, ), and when an upward-sloping characteristic is desired, both the distributor and combiner are of common phase type or anti-phase type, and the delay time τ2 of the delay cable is τ2';1/(1.2f
, ).

〔産業上の利用分野〕[Industrial application field]

本発明は、１個の１〜ランスポンダーを複数の搬送波で
共用するＭＣＰＣ方式，及びｓｃｐｃ方式の衛星通信装
置の、屋外アンテナ近傍に設置される無線装置と、屋内
に設置される端局装置間を接続する中間周波信号用ケー
ブルの減衰周波数特性を補償する場合等に使用されるヘ
クトル合成型振幅等化器に関する。The present invention provides communication between a wireless device installed near an outdoor antenna and a terminal device installed indoors in a satellite communication device of MCPC method and SCPC method in which one transponder is shared by multiple carrier waves. The present invention relates to a Hector synthesis type amplitude equalizer used when compensating for the attenuation frequency characteristics of an intermediate frequency signal cable connecting a cable.

このような衛星通信システムにおいては、アンテナ，送
信電力増幅器，受信低雑音増幅器，アップコンバータ（
Ｕ／Ｃ）及びダウンコンハータ（Ｄ／Ｃ）等よりなる無
線装置と、中間周波合成分配器（Ｉ　Ｆ　−　ＳＵＭ／
Ｄ　Ｉ　Ｖ）等よりなる端局装置間は通常同軸ケーブル
で接続される。Such a satellite communication system requires an antenna, a transmitting power amplifier, a receiving low-noise amplifier, and an up-converter (
A wireless device consisting of a downconverter (D/C), an intermediate frequency synthesizer/distributor (IF-SUM/
Terminal devices such as DIV) are usually connected by coaxial cables.

前者はビル屋上等の屋外に設置され、後者はビル内に設
置される為に、両者を接続する中間周波信号用ケーブル
（同軸ケーブル）の長さは数１０ｍから２００ｍ以上と
なることがある。The former is installed outdoors, such as on the roof of a building, and the latter is installed inside the building, so the length of the intermediate frequency signal cable (coaxial cable) connecting the two may range from several tens of meters to over 200 meters.

この為、この中間周波信号用ケーブルによる信号の減衰
と共に、その減衰周波数特性は第５図の一点鎖線で示す
如くで無視出来ないものとなる。Therefore, along with the attenuation of the signal due to the intermediate frequency signal cable, the attenuation frequency characteristic becomes non-negligible as shown by the dashed line in FIG.

信号の減衰は増幅器により容易に補償可能であるが、減
衰周波数特性はケーブル長によって変化する為に補償は
簡単でない。Signal attenuation can be easily compensated for by an amplifier, but compensation is not easy because the attenuation frequency characteristics vary depending on the cable length.

しかしながら、ケーブル長に合わせて０．１ｄＢ〜０．
５ｄＢ程度に迄等化することは、ケーブル長が極く短い
場合を除きトランスポンダーを効率的に利用する上で不
可欠である。However, depending on the cable length, 0.1 dB to 0.
Equalization to about 5 dB is essential for efficient use of transponders, except in cases where the cable length is extremely short.

この為に振幅等化器が必要であるが、安価で，等化が簡
単で、且つ温度変化に対しても安定度の高いものである
ことが望ましい。For this purpose, an amplitude equalizer is required, but it is desirable that it be inexpensive, easy to equalize, and highly stable against temperature changes.

尚中間周波帯域幅は、７０ＭＨｚ±１８ＭＨｚが大半で
あり１４ＯＭＨＺ±１　８　Ｍ　Ｈ　ｚの場合もある。Note that the intermediate frequency bandwidth is mostly 70 MHz±18 MHz, and may be 14 OMHz±18 MHz.

一３　一 最適の値に設定する方法がとられてきた。13 1 A method of setting the optimum value has been used.

〔従来の技術〕[Conventional technology]

第６図は従来例の振幅等化器の回路図及び減衰周波数特
性図である。FIG. 6 is a circuit diagram and an attenuation frequency characteristic diagram of a conventional amplitude equalizer.

第６図（Ａ）は、従来例の振幅等化器の基本回路のブリ
ッジＴ型回路の回路図であり、この回路では、Ｒ２．Ｌ
／Ｃの関係を保ちつつ、インダクタンスキャパシタンス
を変化させれば、減衰量としては、（Ｂ）に示す如く、
右下がりの１次傾斜を実現するごとが出来る。FIG. 6(A) is a circuit diagram of a bridge T-type circuit which is a basic circuit of a conventional amplitude equalizer, and in this circuit, R2. L
If the inductance and capacitance are changed while maintaining the relationship of /C, the amount of attenuation is as shown in (B).
It is possible to realize a first-order slope that slopes downward to the right.

〔但しＲ＝抵抗（Ω），Ｌ−インダクタンス（Ｈ），Ｃ
−キャバシタンス（Ｆ）を示す〕そこで、中間周波信号
用ケーブル長が決定すると、ケーブルの等化に適する等
化特性が公称値の前後で少しづつ異なる数種類の振幅等
化器を用意し、これ等を接続替えしながら、伝送特性を
測定して最適なものを選ぶか又は、ブリッジＴ型回路の
Ｌ，Ｃを連動で変化して減衰特性を変化出来る振幅等化
器を接続して、伝送特性を測定しながら〔発明が解決し
ようとする課題〕 しかしながら、前者の方法では、振幅等化器を数個用意
せねばならず、高価となり、又一々取り替えて測定せね
ばならず手間がかかる問題点がある。[However, R = resistance (Ω), L - inductance (H), C
- shows the capacitance (F)] Therefore, once the cable length for the intermediate frequency signal is determined, several types of amplitude equalizers with equalization characteristics suitable for cable equalization that differ slightly before and after the nominal value are prepared, and these are used. Either measure the transmission characteristics while changing connections and select the optimal one, or connect an amplitude equalizer that can change the attenuation characteristics by changing the L and C of the bridge T-type circuit in conjunction. [Problem to be Solved by the Invention] However, in the former method, several amplitude equalizers must be prepared, which is expensive, and the problem is that each one must be replaced and measured, which is time-consuming. There is.

後者の方法の振幅等化器はＬ，Ｃを連動で変化して減衰
特性を変化するものである為に特に高価となる問題点が
ある。Since the amplitude equalizer of the latter method changes the attenuation characteristics by changing L and C in conjunction, there is a problem that it is particularly expensive.

又ブリッジＴ型回路では温度が変化すると、インダクタ
ンスし，キャパシタンスＣの値は変化し特性が変わる問
題点もある。Another problem with the bridge T-type circuit is that when the temperature changes, the inductance changes, the value of the capacitance C changes, and the characteristics change.

尚又傾斜の小さい場合は、インダクタンスしは極端に大
きく、キャバシタンスＣは極端に小さ《せねばならず実
現が困難な問題点もある。Furthermore, when the slope is small, the inductance is extremely large and the capacitance C must be extremely small, which is difficult to realize.

本発明は安価で、等化特性を決定するのに手間がかから
ず、安定なヘクトル合成型振幅等化器の提供を目的とし
ている。An object of the present invention is to provide a stable hector-synthesizing amplitude equalizer that is inexpensive, requires no effort to determine equalization characteristics, and is stable.

？課題を解決するための手段〕 第１図は本発明の実施例の構成を示すブロック図で、（
Ａ）は減衰器３を遅延経路側に挿入した場合で、（Ｂ）
は減衰器３を直接経路側に挿入した場合である。? Means for Solving the Problem] FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
A) is the case where attenuator 3 is inserted on the delay path side, (B)
This is the case where the attenuator 3 is inserted directly into the path.

第１図に示す如く、入力信号を２分する分配器１の一方
の出力を、遅延ケーブル４を通して遅延経路として合成
器２の一方の入力端子に人力し、該分配器１の他方の出
力を直接経路にて該合成器２の他方の入力端子に入力し
、 該該合成器２の出力より合成された信号を出力するよう
にすると共に、（Ａ）（Ｂ）に示す如く、上記遅延経路
又は直接経路の何れか一方に減衰器３を挿入しておく。As shown in FIG. 1, one output of a divider 1 that divides the input signal into two is connected to one input terminal of a combiner 2 as a delay path through a delay cable 4, and the other output of the divider 1 is input as a delay path. The signal is input to the other input terminal of the combiner 2 through a direct path, and the combined signal is output from the output of the combiner 2, and as shown in (A) and (B), the delay path Alternatively, the attenuator 3 is inserted in either one of the direct paths.

そして、右下がりの特性を所望する時は、該分配器１を
同相（又は逆相）型、該合成器２を逆相（又は同相）型
とし、入力信号の伝送帯域の中心周波数をｆ■する時、
該遅延ケーブル４の遅延時間τ１を、τ１＃１／　（０
．８ｆ　ｍ）とし、右」二がりの特性を所望する時は、
該分配器（１）及び該合成器（２）を両者共同相型又は
逆相型とし、該遅延ケーブル（４）の遅延時間τ２を、
τ２ζ１／　（１．２ｆ　，）とする。When a downward-sloping characteristic is desired, the divider 1 is of the in-phase (or anti-phase) type, the combiner 2 is of the anti-phase (or in-phase) type, and the center frequency of the transmission band of the input signal is set to f when doing,
The delay time τ1 of the delay cable 4 is expressed as τ1#1/(0
．． 8f m), and if you want the characteristic of "right",
The distributor (1) and the combiner (2) are both common phase type or anti-phase type, and the delay time τ2 of the delay cable (4) is
Let τ2ζ1/(1.2f,).

〔作　用〕[For production]

本発明の場合で、右下がりの特性を所望し、第１図（Ａ
）（Ｂ）の分配器１及び合成器２を共に同相型とし、入
力信号の伝送帯域の中心周波数ｆ１とする時、遅延ケー
ブル４の実効長を周波数ｆ。In the case of the present invention, a downward-sloping characteristic is desired, and FIG.
) When the divider 1 and combiner 2 in (B) are both in-phase type, and the center frequency of the transmission band of the input signal is f1, the effective length of the delay cable 4 is the frequency f.

＝０．８ｆ，でλ／４（λ一波長）に等しい実効長に設
定した時、合成器２の２つの入力信号ＡＩ，Ａ２をベク
トル図で示せば、第２図に示す如くなり、更に夫等の合
成ベクトルである出力信号Ａとの関係を示すと、次式（
１）となる。= 0.8f, and when the effective length is set equal to λ/4 (one wavelength of λ), if the two input signals AI and A2 of the combiner 2 are shown in a vector diagram, it becomes as shown in Fig. 2, and further The relationship with the output signal A, which is the composite vector of the husband, etc., is expressed by the following equation (
1).

Ａ＝　　１　＋ａ２＋２ａＣｏｓ（π／２　・ｆ　／ｆ
ｏ）　・・・（１）但しａ＝Ａ２／ＡＩ．（合成振幅比
）、第２図（Ａ）は第１図（Ａ）（Ｂ）の減衰器３の減
衰景が０の場合（ａ＝１）で、入力信号Ａ２は遅延ケー
ブル４にてπ／２遅れた位相となる為、出力の合成ヘク
１・ルＡはＡ１又はＡ２のＪ倍となる。A= 1 +a2+2aCos(π/2 ・f /f
o) ...(1) However, a=A2/AI. (Synthetic amplitude ratio), Figure 2 (A) shows the case where the attenuation scene of the attenuator 3 in Figures 1 (A) and (B) is 0 (a = 1), and the input signal A2 is Since the phase is delayed by /2, the output composite hexl A is J times A1 or A2.

第２図（Ｂ）は、減衰器３の減衰量が０．５の場合（ａ
＝０．５）で、出力の合成ヘクトルＡはＪ”Ｅ　Ａ　１
よりも小さくなる。FIG. 2(B) shows the case where the attenuation amount of the attenuator 3 is 0.5 (a
= 0.5), the output composite hector A is J”E A 1
becomes smaller than

第２図（Ｃ）は、減衰器３の減衰量が同しく０．５の場
合で、周波数ｆが周波数ｆ。より小さくなった場合で、
入力偲号Ａ２のＡ１に対ずる遅れ位相が、π／２よりも
小さくなる為、出力の合成ベクトルＡは（Ｂ）の場合よ
りも増大ずる。FIG. 2(C) shows a case where the attenuation amount of the attenuator 3 is also 0.5, and the frequency f is the frequency f. If it becomes smaller,
Since the delayed phase of input signal A2 with respect to A1 becomes smaller than π/2, the output composite vector A increases more than in case (B).

第２図（Ｄ）は、減衰器３の減衰量が同しく０．５の場
合で、周波数ｆが周波数ｆ。より大きくなった場合で、
入力信号Ａ２のＡ１に対する遅れ位相が、π／２よりも
太き《なる為、出力の合成ベクトルＡは（Ｂ）の場合よ
りも減少する。FIG. 2(D) shows a case where the attenuation amount of the attenuator 3 is also 0.5, and the frequency f is the frequency f. If it becomes larger,
Since the delayed phase of input signal A2 with respect to A1 is thicker than π/2, the output composite vector A is smaller than in case (B).

結局（１）式のａをパラメータとし、周波数ｆをｆ。で
正規化してＡ（ｆ）を求めると第３図に示す如き曲線と
なる。After all, a in equation (1) is taken as a parameter, and the frequency f is f. When A(f) is normalized by , a curve as shown in FIG. 3 is obtained.

この図よりｆ　／ｆｍが１．２となるイ」近、即ち入力
信号の伝送帯域の中心周波数ｆイで、Ａ（ｆ）は略０．
５となり、ａの値がＯ〜０．７の範囲では変動幅が非常
に小さくなることが判る。From this figure, when f/fm is 1.2, A(f) is approximately 0.
5, and it can be seen that when the value of a is in the range of O to 0.7, the range of fluctuation becomes very small.

従って、ｆ／ｆｏが１．２となる点を、入力信号の伝送
帯域の中心周波数７０ＭＨｚ又は１４０ＭＨｚとし、中
心周波数ｆｍで遅延ケーブル４の遅延時間τ１＃１／　
（０．８ｆ　，）とずるヘクトル合成型振幅等化器とす
れば、減衰器３の減衰量を可変することで等化特性が第
３図に示す如く変化する。従って等化特性を決定するの
に手間がかからないものとなる。Therefore, the point at which f/fo is 1.2 is set to the center frequency of the input signal transmission band of 70 MHz or 140 MHz, and the delay time of the delay cable 4 is τ1#1/at the center frequency fm.
(0.8f,), the equalization characteristic changes as shown in FIG. 3 by varying the amount of attenuation of the attenuator 3. Therefore, determining the equalization characteristics does not require much effort.

又この場合は、分配器１，合成器２．減衰器３，遅延ケ
ーブル４にて構成出来るので、安価で、温度が変化して
も安定なもののみであるので安定なベクトル合成型振幅
等化器が得られる。Also, in this case, distributor 1, combiner 2. Since it can be configured with the attenuator 3 and the delay cable 4, it is inexpensive and stable even when the temperature changes, so a stable vector synthesis type amplitude equalizer can be obtained.

同様に右下がりの特性を所望する場合は、分配器１及び
合成器２とも同相又は逆相の同一のものを用い、入力信
号の伝送帯域の中心周波数をｆ０とする時、遅延ケーブ
ル４の実効長を周波数ｆ。・１．２ｆ，でλ／４（λ一
波長）に等しい実効長に設定すると、（１）式のπ／２
を、 （π／２＋π）に入れ替えた（２）式が成立し、第４図
に示す如き曲線が得られる。Similarly, if a downward-sloping characteristic is desired, use the same divider 1 and combiner 2 with the same phase or opposite phase, and when the center frequency of the input signal transmission band is f0, the effective delay cable 4 The length is the frequency f.・If the effective length is set equal to λ/4 (one wavelength of λ) at 1.2f, then π/2 in equation (1)
Equation (2) is established by replacing (π/2+π), and a curve as shown in FIG. 4 is obtained.

Ａ＝　　Ｌ＋ａ”−２ａＣｏｓ（π／２・ｆ　／ｆｏ）
　・・（２）第４図ではｆ　／ｆｍが０．８となる付近
、即ち中心周波数をｆ１でＡ（ｆ）は略０．５となり、
ａの値がＯ〜０．７の範囲では変動幅が非常に小さくな
ることが判る。A= L+a”-2aCos(π/2・f/fo)
...(2) In Fig. 4, when f /fm is 0.8, that is, when the center frequency is f1, A(f) is approximately 0.5,
It can be seen that when the value of a is in the range of O to 0.7, the fluctuation range becomes very small.

従って、ｒ　／ｒ．が０．８となる点を、７０ＭＨｚ又
は１４０ＭＨｚとし、中心周波数ｆ１で遅延ケーブル４
の遅延時間τ２”＝ｉｌ／（１．２ｆゎ）とするベクト
ル合成型振幅等化器とすれば、減衰器３の減衰量を可変
することで等化特性が第４図に示す如く変化する。従っ
て等化特性を決定するのに手間がかからないものとなる
。Therefore, r/r. The point where is 0.8 is set to 70MHz or 140MHz, and the delay cable 4 is
If we use a vector synthesis type amplitude equalizer with a delay time τ2'' = il/(1.2 fゎ), the equalization characteristics will change as shown in Figure 4 by varying the amount of attenuation of attenuator 3. .Therefore, it does not take much time to determine the equalization characteristics.

又この場合も、分配器１，合成器２，減衰器３，遅延ケ
ーブル４にて構成出来るので、安価で、温度が変化に対
しても安定なもののみであるので安定なベク１・ル合成
型振幅等化器が得られる。Also, in this case, since it can be configured with a distributor 1, a combiner 2, an attenuator 3, and a delay cable 4, it is inexpensive and stable even when the temperature changes, so it is a stable vector 1-le synthesis. type amplitude equalizer is obtained.

尚、第３図では右下がり，右上がり、・・・第４図では
右上がり．右下がり．・・・と無数に現れ、夫々の遅延
時間を持つようにケーブル長を選ぶことにより実現可能
であるが、τが大きくなる程直線特性の帯域幅が狭くな
る上に、ケーブル長も長くなり実用上不利になる。In addition, in Figure 3, it is downward to the right, upward to the right, ... In Figure 4, it is upward to the right. Down to the right. ..., and this can be realized by selecting the cable length so that each has its own delay time, but as τ increases, the linear characteristic bandwidth becomes narrower and the cable length becomes longer, making it impractical. You will be at a disadvantage.

〔実施例〕 第１図は本発明の実施例の構成を示すブロック図、第５
図は本発明の実施例の相対減衰量周波数特性とケーブル
の相対減衰量周波数特性を示す図である。[Embodiment] Fig. 1 is a block diagram showing the configuration of an embodiment of the present invention.
The figure is a diagram showing the relative attenuation frequency characteristics of the embodiment of the present invention and the relative attenuation frequency characteristics of the cable.

第１図に示す分配器１，合成器２，減衰器３は入出力イ
ンピーダンスが７５Ω又は５０Ωに統一しておくと接続
点におけるインピーダンス不整合による特性の劣化や特
性の不安定性を防止出来る。If the input and output impedances of the divider 1, combiner 2, and attenuator 3 shown in FIG. 1 are unified to 75Ω or 50Ω, deterioration of characteristics and instability of characteristics due to impedance mismatch at the connection points can be prevented.

この為には、分配器］，合成器２としては、例えば、Ｍ
ｉｎｉ−Ｃｉｒｃｕｉｔｓ社（ＵＳＡ）のＰＳＣ−２−
１−７５型（同相）及びＰＳＣＪ−２−１−７５型（逆
相）、ＰＯＷＥＲ−ＤＩＶｒＤＥＲ／ＳＰＲ　ＩＴＴＥ
Ｒが小形で特性も充分であり使い易いものである。For this purpose, for example, M
PSC-2- from ini-Circuits (USA)
1-75 type (in-phase) and PSCJ-2-1-75 type (reverse phase), POWER-DIVrDER/SPR ITTE
R is small, has sufficient characteristics, and is easy to use.

減衰器３としては、東京コスモス（株）のＡＴ１６型抵
抗可変減衰器等が使用出来、又遅延ケーブル４としては
、７５Ω系であれば、１，５Ｃ−２Ｖ（ＪＪＳ規格）等
で容易に実現出来る。As the attenuator 3, an AT16 variable resistance attenuator from Tokyo Cosmos Co., Ltd. can be used, and as the delay cable 4, if it is a 75Ω system, it can be easily realized with 1.5C-2V (JJS standard), etc. I can do it.

尚合成器，分配器としてトランジスタやリニアＩＣを利
用して構成することも容易であるが、電源が必要になる
ので使い難い場合がある。Although it is easy to construct the combiner and divider using transistors and linear ICs, it may be difficult to use because a power source is required.

これらを用いて分配器１は同相型，合成器２は逆相型と
し、第５図の一点鎖線で示す、７０ＭＨｚ帯のケーブル
の右下がり１次傾斜の特性を補償する為に実現したヘク
トル合成型振幅等化器の相対減衰量周波数特性を示すと
第５図に示す如くである。Using these, the distributor 1 is of the in-phase type and the combiner 2 is of the anti-phase type, and the hector synthesis realized in order to compensate for the downward-sloping primary slope characteristic of the 70 MHz band cable, as shown by the dashed line in Figure 5. The relative attenuation frequency characteristics of the type amplitude equalizer are shown in FIG.

第５図では７０ＭＨｚの減衰を基準とした相対値で表し
ているが、７０ＭＨｚにおけるレベルの変動はａ＝−６
　ｄＢ　（ａ＝０．５）　〜−ＯＣ＋ｄＢ（ａ＝０）の
範囲で０．２ｄＢにすることが可能であり、ケーブルの
右下がり１次傾斜の特性を充分補償出来るものである。In Figure 5, the attenuation at 70MHz is expressed as a relative value, but the level fluctuation at 70MHz is a=-6.
It is possible to set it to 0.2 dB in the range of dB (a=0.5) to -OC+dB (a=0), and can sufficiently compensate for the characteristic of the cable's downward-sloping linear slope.

即ち、減衰器３の減衰量を可変ずることで等化特性が細
かく変化し、等化特性を決定するのに手間がかからず、
又分配器１，合成器２．減衰器３，遅延ケーブル４にて
構成出来るので、安価で、温度が変化しても安定なもの
のみであるので安定なベクトル合成型振幅等化器が得ら
れる。That is, by varying the amount of attenuation of the attenuator 3, the equalization characteristic changes finely, and it does not take much time to determine the equalization characteristic.
Also, a distributor 1, a combiner 2. Since it can be configured with the attenuator 3 and the delay cable 4, it is inexpensive and stable even when the temperature changes, so a stable vector synthesis type amplitude equalizer can be obtained.

〔発明の効果〕〔Effect of the invention〕

以上詳細に説明せる如く本発明によれば、安価で安定で
、且つ等化を行うのに手間が少ないベクトル合成型振幅
等化器が得られる効果がある。As described above in detail, the present invention has the effect of providing a vector synthesis type amplitude equalizer that is inexpensive, stable, and requires less effort to perform equalization.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の実施例の構成を示すプロ・ンク図、第
２図は第１図の合成器で合成される信号のヘクトル表示
図、 第３図，第４図は本発明の実施例の減衰量の周波数特性
図、 第５図は本発明の実施例の相対減衰量周波数特性とケー
ブルの相対減衰量周波数特性を示す図、第６図は従来例
の振幅等化器の回路図及び減衰周波数特性図である。 図において、 １は分配器、 ２は合成器、 ３ぱ減衰器、 ４は遅延ケーブルを示す。 （Ａ冫 （Ｂ） （Ｃ） 第１記／）／８′べ器ブ有べさ汎ろ４ぎ多ｎベクＨ／レ
表イ良第 層 （ｐノ 蒙狙ケＩｔｎ振幅博乞器０口路図攻び゜５べ峯因浪斂看
・閑口’Ａｔ）　　　ロFig. 1 is a block diagram showing the configuration of an embodiment of the present invention, Fig. 2 is a vector representation of signals synthesized by the synthesizer of Fig. 1, and Figs. 3 and 4 are diagrams showing the implementation of the present invention. FIG. 5 is a diagram showing the relative attenuation frequency characteristics of the embodiment of the present invention and the relative attenuation frequency characteristics of the cable. FIG. 6 is a circuit diagram of a conventional amplitude equalizer. and an attenuation frequency characteristic diagram. In the figure, 1 is a distributor, 2 is a combiner, 3 is an attenuator, and 4 is a delay cable. (A 冫 (B) (C) 1st article /) / 8'be device bu be sa general ro 4 gita n bek H/re surface good layer (pnommon aimke Itn amplitude beggar 0 Attack on the entrance map

Claims (1)

【特許請求の範囲】 入力信号を２分する分配器（１）の一方の出力を、遅延
ケーブル（４）を通して遅延経路として合成器（２）の
一方の入力端子に入力し、 該分配器（１）の他方の出力を直接経路にて該合成器（
２）の他方の入力端子に入力し、 該該合成器（２）の出力より合成された信号を出力する
ようにすると共に、上記遅延経路又は直接経路の何れか
一方に減衰器（３）を挿入しておき、右下がりの特性を
所望する時は、該分配器（１）を同相（又は逆相）型、
該合成器（２）を逆相（又は同相）型とし、入力信号の
伝送帯域の中心周波数をｆ＿ｍとする時、該遅延ケーブ
ル（４）の遅延時間τ１を、τ１≒１／（０．８ｆ＿ｍ
）とし、右上がりの特性を所望する時は、該分配器（１
）及び該合成器（２）を両者共同相型又は逆相型とし、
該遅延ケーブル（４）の遅延時間τ２を、τ２≒１／（
１．２ｆ＿ｍ）とすることを特徴とするベクトル合成型
振幅等化器。[Claims] One output of a divider (1) that divides an input signal into two is inputted to one input terminal of a combiner (2) as a delay path through a delay cable (4), and the divider ( 1) to the combiner (
2), and output the combined signal from the output of the combiner (2), and an attenuator (3) is provided in either the delay path or the direct path. When inserting the divider (1) and desiring a downward-sloping characteristic, use the divider (1) as an in-phase (or anti-phase) type,
When the synthesizer (2) is of the anti-phase (or in-phase) type and the center frequency of the transmission band of the input signal is f_m, the delay time τ1 of the delay cable (4) is τ1≒1/(0.8f_m
), and when you want an upward-sloping characteristic, use the distributor (1
) and the synthesizer (2) are both common phase type or reverse phase type,
The delay time τ2 of the delay cable (4) is defined as τ2≒1/(
1.2f_m).