JP2003110308A - Non-reflective terminator - Google Patents
Non-reflective terminatorInfo
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- JP2003110308A JP2003110308A JP2001306099A JP2001306099A JP2003110308A JP 2003110308 A JP2003110308 A JP 2003110308A JP 2001306099 A JP2001306099 A JP 2001306099A JP 2001306099 A JP2001306099 A JP 2001306099A JP 2003110308 A JP2003110308 A JP 2003110308A
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- resistor
- open
- characteristic impedance
- series circuit
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、マイクロ波帯の
レーダあるいは通信装置に使用され、広帯域にわたって
リターンロス特性の優れた無反射終端器に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflectionless termination used in a microwave band radar or a communication device and having an excellent return loss characteristic over a wide band.
【０００２】[0002]
【従来の技術】マイクロ波、ミリ波帯のレーダ装置ある
いは通信装置では一般にアイソレータ、カップラ等のコ
ンポーネントが使用され、これらのコンポーネントには
無反射終端器が必要となる。2. Description of the Related Art Components such as isolators and couplers are generally used in microwave or millimeter-wave radar devices or communication devices, and these components require non-reflecting terminators.
【０００３】図６は例えば昭和５１年度電子通信学会総
合全国大会、講演番号５９７に示された従来の無反射終
端器の構成を示すもので、図中、１は誘電体基板、２は
入力端子、３は伝送線路、４は第１の抵抗、５は先端開
放線路である。この無反射終端器はこの図に示すよう
に、伝送線路３の一端には第１の抵抗４と先端開放線路
５とからなる直列回路が接続されるように配置されてお
り、これらの伝送線路３、第１の抵抗４及び先端開放線
路５はマイクロ波集積回路技術により誘電体基板１上に
一体形成されている。また、伝送線路３の他端には入力
端子２が設けられており、この入力端子２はアイソレー
タ、カップラ等のコンポーネントに接続される。FIG. 6 shows the structure of a conventional non-reflective terminator shown in lecture number 597 of the 51st General Conference of the Institute of Electronics and Communication Engineers in 1976, where 1 is a dielectric substrate and 2 is an input terminal. 3 is a transmission line, 4 is a first resistor, and 5 is an open-ended line. As shown in this figure, this non-reflective terminator is arranged so that a series circuit composed of a first resistor 4 and an open-ended line 5 is connected to one end of the transmission line 3. 3, the first resistor 4 and the open-ended line 5 are integrally formed on the dielectric substrate 1 by the microwave integrated circuit technique. An input terminal 2 is provided at the other end of the transmission line 3, and the input terminal 2 is connected to components such as an isolator and a coupler.
【０００４】図７（a）、（b）はそれぞれ従来の無反射
終端器の等価回路及び特性例を示すものである。ここ
で、伝送線路３の特性インピーダンスをZ0,第１の抵抗
４の値をR1,先端開放線路５の特性インピーダンスおよ
び長さをそれぞれZ1,Θ１とすると図６に示す無反射終
端器は図７（a）のように表すことができる。この等価
回路において、伝送線路３の一端から第１の抵抗４側を
みたインピーダンスZL、反射係数ΓおよびVSWRはそれぞ
れ次式で与えられる。FIGS. 7 (a) and 7 (b) show an equivalent circuit and a characteristic example of a conventional non-reflective terminator, respectively. Here, assuming that the characteristic impedance of the transmission line 3 is Z0, the value of the first resistor 4 is R1, and the characteristic impedance and length of the open-ended line 5 are Z1 and Θ1, respectively, the non-reflective terminator shown in FIG. It can be expressed as (a). In this equivalent circuit, the impedance ZL looking from the one end of the transmission line 3 to the first resistor 4 side, the reflection coefficient Γ and VSWR are respectively given by the following equations.
【０００５】[0005]
【数１】 [Equation 1]
【０００６】[0006]
【数２】 [Equation 2]
【０００７】[0007]
【数３】 [Equation 3]
【０００８】通常、先端開放線路５の長さは所望の周波
数ｆ0で１／４波長すなわちΘ１＝９０°に選ばれる。
このような長さに選ぶことにより、第１の抵抗４の一端
が高周波的に短絡され、数１から明らかなようにZL=R1
となる。また、第１の抵抗４の値R1は伝送線路３の特性
インピーダンスZ0および入力端子２に接続されるコンポ
ーネントのインピーダンスに等しく、通常、５０Ωに選
ばれる。このような値に選ぶことにより、無反射終端器
のVSWRは数２，数３から明らかなように１となる。Normally, the length of the open-ended line 5 is selected to be a quarter wavelength at a desired frequency f0, that is, Θ1 = 90 °.
By selecting such a length, one end of the first resistor 4 is short-circuited at high frequency, and ZL = R1
Becomes The value R1 of the first resistor 4 is equal to the characteristic impedance Z0 of the transmission line 3 and the impedance of the component connected to the input terminal 2, and is usually selected to be 50Ω. By selecting such a value, the VSWR of the non-reflective terminator becomes 1 as apparent from the equations 2 and 3.
【０００９】従って、無反射終端器のVSWR特性は図７
（ｂ）に示すように所望の周波数ｆ０で最少となり、ｆ
０から離れるに従って、徐々に劣化する特性となる。通
常、無反射終端器として問題なく使用できるVSWRは１．
２以下であり、帯域は先端開放線路５の特性インピーダ
ンスZ1に依存する。例えば、Z1=５０Ωでは比帯域で２
２％、２５Ωでは４５％が得られ、Z1が低いほど広帯域
化が図れる。Therefore, the VSWR characteristic of the non-reflective terminator is shown in FIG.
As shown in (b), it becomes minimum at the desired frequency f0, and f
The characteristic gradually deteriorates with increasing distance from 0. Normally, VSWR that can be used as a non-reflective terminator without problems is 1.
2 or less, and the band depends on the characteristic impedance Z1 of the open-ended line 5. For example, if Z1 = 50Ω, the ratio band is 2
2% and 45% are obtained at 25Ω, and the wider Z1 is, the wider the band can be achieved.
【００１０】次に動作原理について説明する。図６にお
いて、アイソレータあるいはカップラ等のコンポーネン
トから漏洩した不要なマイクロ波は入力端子２から入力
され、伝送線路３を介して第１の抵抗４で吸収される。
特に周波数ｆ０の不要なマイクロ波は完全に吸収され、
それ以外のｆ０近傍の周波数帯でも大部分が吸収され
る。従って、入力端子２における不要なマイクロ波の反
射波をほとんど無くすことができる。Next, the principle of operation will be described. In FIG. 6, unnecessary microwaves leaked from a component such as an isolator or a coupler are input from the input terminal 2 and absorbed by the first resistor 4 via the transmission line 3.
Especially, unnecessary microwaves of frequency f0 are completely absorbed,
Most of the other frequency bands near f0 are also absorbed. Therefore, it is possible to almost eliminate unnecessary reflected waves of microwaves at the input terminal 2.
【００１１】以上のように、伝送線路３の一端に第１の
抵抗４と先端開放線路５との直列回路を接続する事によ
り、無反射終端器からの不要なマイクロ波の反射波がほ
とんど存在しないため、入力端子２に接続されるアイソ
レータ、カップラ等のコンポーネントの高性能化を図る
ことができる。As described above, by connecting the series circuit of the first resistor 4 and the open-ended line 5 to one end of the transmission line 3, there is almost no unnecessary reflected wave of the microwave from the reflectionless termination device. Therefore, it is possible to improve the performance of components such as an isolator and a coupler connected to the input terminal 2.
【００１２】[0012]
【発明が解決しようとする課題】従来の無反射終端器で
は帯域は先端開放線路の特性インピーダンスZ1に依存す
る。これは誘電体基板の誘電率、厚さおよび先端開放線
路の幅により決まり、実現上、１０Ω程度が限界であ
る。この場合、比帯域は１００％となる。このように、
この種の無反射終端器では比帯域が比較的狭いため、通
常、コンポーネントの周波数の応じて無反射終端器を設
計する必要があり、設計時間がかかるとともに、品種も
増えてしまう問題点があった。また、ある種のレーダ装
置においては2〜３オクターブの超広帯域化が要求され
る場合があり、このような装置には使用できない問題点
もあった。In the conventional non-reflective terminator, the band depends on the characteristic impedance Z1 of the open-ended line. This is determined by the permittivity and thickness of the dielectric substrate and the width of the open-ended line, and the limit is about 10Ω in terms of realization. In this case, the specific bandwidth is 100%. in this way,
Since this type of non-reflecting terminator has a relatively narrow bandwidth, it is usually necessary to design the non-reflecting terminator according to the frequency of the component, which requires design time and increases the number of products. It was Further, a certain type of radar device may be required to have an ultra-wide band of 2 to 3 octaves, and there is a problem that such a device cannot be used.
【００１３】この発明は上記のような課題を解消するた
めになされたもので、周波数に依存せず広帯域にわたっ
てＶＳＷＲの良好な無反射終端器を得ることを目的とし
ている。The present invention has been made to solve the above problems, and an object thereof is to obtain a non-reflection terminator having a good VSWR over a wide band without depending on the frequency.
【００１４】[0014]
【課題を解決するための手段】第１の発明による無反射
終端器は従来の第１の抵抗と先端開放線路との直列回路
に、並列に、第２の抵抗と先端短絡線路との直列回路を
接続したものである。A non-reflective terminator according to the first aspect of the present invention is a conventional series circuit of a first resistor and an open-ended line, and a parallel series circuit of a second resistor and a short-ended line. Is connected.
【００１５】また、第２の発明による無反射終端器は第
１の抵抗と第２の抵抗が伝送線路の特性インピーダンス
に、また、先端開放線路の長さと先端短絡線路の長さが
それぞれ等しく、かつ、先端開放線路の特性インピーダ
ンスと先端短絡線路の特性インピーダンスとの積が伝送
線路の特性インピーダンスの２乗に等しくしたものであ
る。In the non-reflective terminator according to the second aspect of the invention, the first resistance and the second resistance are equal to the characteristic impedance of the transmission line, and the length of the open-ended line and the length of the short-circuited end are equal, respectively. Moreover, the product of the characteristic impedance of the open-ended line and the characteristic impedance of the short-circuited line is equal to the square of the characteristic impedance of the transmission line.
【００１６】[0016]
【発明の実施の形態】実施の形態１．図１は実施の形態
１の無反射終端器の構成を示すものであり、図中、６は
第２の抵抗、７は先端短絡線路、８は金属ブロックであ
る。この無反射終端器はこの図に示すように、第１の抵
抗４が接続されている伝送線路３の先端に、第２の抵抗
６と金属ブロック８により先端短絡された先端短絡線路
７との直列回路を接続したものであり、誘電体基板１上
にマイクロ波集積回路を用いて一体形成されている。な
お、ここでは先端短絡線路７を実現するのに金属ブロッ
ク８を用いた場合について示しているが、メッキを施し
たスルホール、誘電体基板１の側面メタライズを用いて
も良い。BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 1 shows the structure of the non-reflective terminator according to the first embodiment. In the figure, 6 is a second resistor, 7 is a tip short-circuited line, and 8 is a metal block. As shown in this figure, this non-reflective terminator has a tip of a transmission line 3 to which a first resistor 4 is connected, a second resistor 6 and a tip short-circuit line 7 short-circuited by a metal block 8. A series circuit is connected and integrally formed on the dielectric substrate 1 by using a microwave integrated circuit. Although the case where the metal block 8 is used to realize the tip short-circuited line 7 is shown here, plated through holes and side surface metallization of the dielectric substrate 1 may be used.
【００１７】図２（a）はこの発明の無反射終端器の等
価回路を表すものである。この図から明らかなように従
来の無反射終端器を構成する第１の抵抗４と先端開放線
路５との直列回路に、並列に、第２の抵抗６と先端短絡
線路７との直列回路を接続されたものと見なすことがで
きる。ここで先端短絡線路７の長さは先端開放線路５の
長さとほぼ同じく所望の周波数ｆ０で１／４波長に選ば
れている。このような長さに選ぶことにより、ｆ０の偶
数倍の周波数に対して、図２（a）は図２（ｂ）の等価
回路となる。即ち、伝送線路３の先端には第１の抵抗４
のみが接続されたものと見なすことができる。また、直
流およびｆ０の奇数倍の周波数に対しては図２（ｃ）の
等価回路となり、伝送線路３の先端には第２の抵抗６の
みが接続されたものと見なすことができる。FIG. 2 (a) shows an equivalent circuit of the reflectionless termination of the present invention. As is apparent from this figure, a series circuit of a second resistor 6 and a tip short-circuited line 7 is connected in parallel to a series circuit of a first resistor 4 and a tip open line 5 which form a conventional non-reflective terminator. Can be considered connected. Here, the length of the tip short-circuited line 7 is selected to be a quarter wavelength at a desired frequency f0, which is almost the same as the length of the tip open line 5. By selecting such a length, FIG. 2 (a) becomes an equivalent circuit of FIG. 2 (b) for frequencies that are even multiples of f0. That is, the first resistor 4 is provided at the tip of the transmission line 3.
Only can be considered connected. Further, for the direct current and the frequency of odd multiples of f0, the equivalent circuit of FIG. 2C is obtained, and it can be considered that only the second resistor 6 is connected to the tip of the transmission line 3.
【００１８】図３はこの発明の無反射終端器のVSWR特性
の一例である。第２の抵抗６の抵抗値を第１の抵抗４と
同様に伝送線路３の特性インピーダンスZ0にほぼ等しく
選ぶことにより、この図に示すように広帯域にわたって
良好な特性が得られる。FIG. 3 shows an example of VSWR characteristics of the reflectionless termination of the present invention. By selecting the resistance value of the second resistor 6 to be substantially equal to the characteristic impedance Z0 of the transmission line 3 as with the first resistor 4, good characteristics can be obtained over a wide band as shown in this figure.
【００１９】次に動作原理について説明する。図１おい
て、アイソレータあるいはカップラ等のコンポーネント
から漏洩した不要なマイクロ波は入力端子２から入力さ
れ、伝送線路３を通って第１の抵抗４と第２の抵抗６に
到達する。ここでｆ０の偶数倍の周波数成分のマイクロ
波は第１の抵抗４で、奇数倍の周波数成分のマイクロ波
は第２の抵抗６で吸収され、それ以外のマイクロ波は両
者で大部分吸収される。従って、広帯域にわたって入力
端子２における不要なマイクロ波の反射波を無くすこと
ができる。Next, the operation principle will be described. In FIG. 1, unnecessary microwave leaked from a component such as an isolator or a coupler is input from the input terminal 2, passes through the transmission line 3, and reaches the first resistor 4 and the second resistor 6. Here, the microwave of the frequency component of an even multiple of f0 is absorbed by the first resistor 4, the microwave of the frequency component of an odd multiple is absorbed by the second resistor 6, and the other microwaves are mostly absorbed by both. It Therefore, unnecessary microwave reflected waves at the input terminal 2 can be eliminated over a wide band.
【００２０】以上のように、この発明の無反射終端器で
は従来の無反射終端器を構成する第１の抵抗４と先端開
放線路５との直列回路に並列接続されるように、第２の
抵抗６と先端短絡線路７との直列回路を設けることによ
り、数オクターブ以上の広帯域にわたって良好なVSWRを
得ることができる。従って、従来のようにコンポーネン
トの周波数に応じて無反射終端器の設計をする必要が無
く設計時間の短縮が図れるとともに、品種も削減できる
ため低価格化を図ることができる利点がある。また、２
〜３オクターブの超広帯域が要求されるレーダ装置にも
使用可能である。As described above, in the reflectionless termination of the present invention, the second resistor is connected so as to be connected in parallel to the series circuit of the first resistor 4 and the open-ended line 5 constituting the conventional reflectionless termination. By providing a series circuit of the resistor 6 and the tip short-circuited line 7, a good VSWR can be obtained over a wide band of several octaves or more. Therefore, unlike the conventional case, it is not necessary to design the antireflection terminator according to the frequency of the component, the design time can be shortened, and the types can be reduced, so that there is an advantage that the cost can be reduced. Also, 2
It can also be used for radar devices that require an ultra-wide band of ~ 3 octaves.
【００２１】実施の形態２．実施の形態２の無反射終端
器は実施の形態１と基本構成は同じであるが、実施の形
態１では先端開放線路５と先端短絡線路７の長さをそれ
ぞれ所望の周波数で１／４波長に選んだ場合について示
したが、実施の形態２ではこれらの長さに限定するもの
ではない。ここで第１の抵抗４の抵抗値をR2,先端開放
線路５の特性インピーダンス、長さをそれぞれZ1,Θ１
とし、第２の抵抗６の抵抗値をR2,先端短絡線路７の特
性インピーダンス、長さをそれぞれZ2、Θ２とすると、
実施の形態２の無反射終端器の等価回路は図４で表せ
る。この等価回路において、伝送線路３の先端から第１
の抵抗４側を見たインピーダンスZLは数４で表すことが
できる。Embodiment 2. The non-reflective terminator of the second embodiment has the same basic configuration as that of the first embodiment. However, in the second embodiment, the length is not limited to these. Here, the resistance value of the first resistor 4 is R2, the characteristic impedance of the open-ended line 5 and the length are Z1 and Θ1, respectively.
And the resistance value of the second resistor 6 is R2, the characteristic impedance of the tip short-circuited line 7 is Z2, and the length is Θ2, respectively.
An equivalent circuit of the reflectionless termination of the second embodiment can be represented in FIG. In this equivalent circuit, the first from the tip of the transmission line 3
The impedance ZL seen from the resistance 4 side of can be expressed by Equation 4.
【００２２】[0022]
【数４】 [Equation 4]
【００２３】この式において、虚数部が零になる条件を
求めると、R1=R2=Z0, Θ１＝Θ２,Z1＊Z2=Z0＊Z0とな
る。即ち、第１の抵抗４と第２の抵抗６とがそれぞれ伝
送線路３の特性インピーダンスZ0に、また、先端開放線
路５の長さと先端短絡線路７との長さが等しく、さら
に、先端開放線路５と先端短絡線路７との特性インピー
ダンスの積が伝送線路３の特性インピーダンスZ0の２乗
に等しい。この場合、所望の周波数ｆ０でΘ１＝Θ２＝
９０°に選ぶ必要がなく、任意の長さで良い。このよう
な条件では実数部は数５となる。In this equation, if the condition that the imaginary part becomes zero is obtained, R1 = R2 = Z0, Θ1 = Θ2, Z1 * Z2 = Z0 * Z0. That is, the first resistor 4 and the second resistor 6 respectively have the characteristic impedance Z0 of the transmission line 3, the lengths of the open-ended line 5 and the open-ended shorted line 7 are equal, and The product of the characteristic impedances of 5 and the tip short-circuited line 7 is equal to the square of the characteristic impedance Z0 of the transmission line 3. In this case, at the desired frequency f0, Θ1 = Θ2 =
There is no need to select 90 °, and any length may be used. Under such a condition, the real number part is given by equation 5.
【００２４】[0024]
【数５】 [Equation 5]
【００２５】即ち、伝送線路３の先端から第１の抵抗４
側を見たインピーダンスZLは伝送線路３の特性インピー
ダンスZ0に等しい。従って、図４（ｂ）に示すように周
波数に関系なく、VSWR=１の非常に良好な特性が得ら
れ、この無反射終端器を使用することで、よりコンポー
ネントの高性能化、広帯域化が図れる。That is, from the tip of the transmission line 3 to the first resistor 4
The impedance ZL seen from the side is equal to the characteristic impedance Z0 of the transmission line 3. Therefore, as shown in Fig. 4 (b), a very good characteristic of VSWR = 1 can be obtained regardless of the frequency. By using this non-reflective terminator, the performance of the component can be improved and the band can be widened. Can be achieved.
【００２６】図５はこの発明の実施の形態２の無反射終
端器の構成を示すものである。先端開放線路５の特性イ
ンピーダンスZ1と先端短絡線路７の特性インピーダンス
Z2をそれぞれ５０Ωにするか、この図のようにZ1とZ2が
異なる、即ち、幅が異なっても良い。例えば、Z1=１０
Ωの場合、Z2=２５０Ωに選べば良く、その逆であって
も同じである。FIG. 5 shows the structure of the non-reflective terminator according to the second embodiment of the present invention. Characteristic impedance Z1 of open-ended line 5 and characteristic impedance of open-ended line 7
Z2 may be 50Ω respectively, or Z1 and Z2 may be different, that is, the widths may be different as shown in this figure. For example, Z1 = 10
In the case of Ω, Z2 = 250Ω may be selected, and vice versa.
【００２７】このように、この無反射終端器の第１の抵
抗４、第２の抵抗６、先端開放線路５および先端短絡線
路７の長さと特性インピーダンスをこのような値に選ぶ
ことにより、周波数に関係なく常にVSWR=１が得られ、
この無反射終端器を使用することで、よりコンポーネン
トの高性能化、広帯域化が図れる。As described above, by selecting the length and the characteristic impedance of the first resistor 4, the second resistor 6, the open-ended line 5 and the short-circuited end line 7 of this non-reflection terminator to such values, VSWR = 1 is always obtained regardless of
By using this non-reflective terminator, it is possible to achieve higher performance of components and wider bandwidth.
【００２８】以上に示した無反射終端器では誘電体基板
１上にマイクロ波集積回路技術により構成した場合につ
いて述べたが、半導体基板上にモノリシック集積回路技
術を用いて構成した場合であっても良く、また、第２の
抵抗６と先端短絡線路７とを構成する基板が他と異なっ
ても良い。さらに、第１の抵抗４および第２の抵抗６は
チップ抵抗を用いた場合であっても良い。In the above-described non-reflective terminator, the case where the dielectric substrate 1 is constructed by the microwave integrated circuit technique has been described. However, even when it is constructed on the semiconductor substrate by the monolithic integrated circuit technique. The substrate forming the second resistor 6 and the tip short-circuited line 7 may be different from the others. Furthermore, the first resistor 4 and the second resistor 6 may be chip resistors.
【００２９】[0029]
【発明の効果】第１の発明によれば、第１の抵抗と先端
開放線路との直列回路に、第２の抵抗と先端短絡線路と
の直列回路を並列に接続することにより、広帯域にわた
って良好な特性の無反射終端器が得られる。このため、
周波数の異なる多品種の無反射終端器を設計、製作する
必要がなく、設計時間の短縮および低価格化が図れる効
果がある。According to the first aspect of the present invention, by connecting the series circuit of the second resistor and the short-circuited tip line in parallel to the series circuit of the first resistor and the open-ended line, good performance over a wide band is achieved. A non-reflective terminator having various characteristics can be obtained. For this reason,
Since there is no need to design and manufacture various types of anti-reflection terminators having different frequencies, the design time can be shortened and the cost can be reduced.
【００３０】また、第２の発明によれば、第１の抵抗と
第２の抵抗がそれぞれ特性インピーダンスZ0に、また、
先端開放線路の長さと先端短絡線路の長さが等しく、か
つ、先端開放線路の特性インピーダンスと先端短絡線路
の特性インピーダンスとの積が特性インピーダンスZ0の
２乗に等しいくすることにより、周波数に関系なく、常
に、VSWR=１の特性が得られる。このため、設計時間の
短縮および低価格化が図れるとともに、コンポーネント
のより高性能化が図れる効果がある。According to the second aspect of the invention, the first resistor and the second resistor respectively have characteristic impedance Z0, and
The length of the open-ended line is equal to the length of the short-circuited line, and the product of the characteristic impedance of the open-ended line and the characteristic impedance of the short-circuited line is set to be equal to the square of the characteristic impedance Z0. The characteristic of VSWR = 1 is always obtained regardless of the relationship. Therefore, the design time can be shortened and the price can be reduced, and the performance of the component can be improved.
【図１】 この発明による実施の形態１の無反射終端器
の構成を示す図である。FIG. 1 is a diagram showing a configuration of a reflectionless termination device according to a first embodiment of the present invention.
【図２】 この発明による実施の形態１の無反射終端器
の等価回路を示す図である。FIG. 2 is a diagram showing an equivalent circuit of the non-reflective terminator according to the first embodiment of the present invention.
【図３】 この発明による実施の形態１の無反射終端器
のVSWR特性の一例を示す図である。FIG. 3 is a diagram showing an example of VSWR characteristics of the reflectionless termination according to the first embodiment of the present invention.
【図４】 この発明による実施の形態２の無反射終端器
の等価回路およびVSWR特性を示す図である。FIG. 4 is a diagram showing an equivalent circuit and VSWR characteristics of a reflectionless termination device according to a second embodiment of the present invention.
【図５】 この発明による実施の形態２の無反射終端器
の構成を示す図である。FIG. 5 is a diagram showing a configuration of a reflectionless termination device according to a second embodiment of the present invention.
【図６】 従来の無反射終端器の構成を示す図である。FIG. 6 is a diagram showing a configuration of a conventional non-reflection terminator.
【図７】 従来の無反射終端器の等価回路およびVSWR特
性を示す図である。FIG. 7 is a diagram showing an equivalent circuit and VSWR characteristics of a conventional non-reflection terminator.
１ 誘電体基板 ２ 入力端子 ３ 伝送線路 ４ 第１の抵抗 ５ 先端開放線路 ６ 第２の抵抗 ７ 先端短絡線路 ８ 金属ブロック 1 Dielectric substrate 2 input terminals 3 transmission lines 4 First resistance 5 open-ended track 6 Second resistance 7 Tip short-circuit line 8 metal blocks
Claims (2)
路の一端に接続され、第１の抵抗と所望の周波数で１／
４波長の長さを有する先端開放線路との直列回路と、上
記直列回路に並列に接続され、第２の抵抗と先端短絡線
路との直列回路とを有することを特徴とする無反射終端
器1. A transmission line having a characteristic impedance Z0, which is connected to one end of the transmission line and has a 1 /
A non-reflective terminator comprising a series circuit with an open-ended line having a length of 4 wavelengths and a series circuit connected in parallel to the series circuit and having a second resistor and a short-circuited end line.
ピーダンスZ0に、また、先端開放線路の長さと先端短絡
線路の長さがそれぞれ等しく、かつ、先端開放線路の特
性インピーダンスと先端短絡線路の特性インピーダンス
との積が特性インピーダンスZ0の２乗に等しいことを特
徴とする請求項１記載の無反射終端器。2. The first resistance and the second resistance are equal to the characteristic impedance Z0, the length of the open-ended line is equal to the length of the open-ended shorted line, and the characteristic impedance of the open-ended line and the open-ended short. The non-reflective terminator according to claim 1, wherein the product of the characteristic impedance of the line and the square of the characteristic impedance Z0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001306099A JP3846558B2 (en) | 2001-10-02 | 2001-10-02 | Non-reflective terminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001306099A JP3846558B2 (en) | 2001-10-02 | 2001-10-02 | Non-reflective terminator |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2003110308A true JP2003110308A (en) | 2003-04-11 |
| JP2003110308A5 JP2003110308A5 (en) | 2005-01-27 |
| JP3846558B2 JP3846558B2 (en) | 2006-11-15 |
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ID=19125789
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001306099A Expired - Fee Related JP3846558B2 (en) | 2001-10-02 | 2001-10-02 | Non-reflective terminator |
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| Country | Link |
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| JP (1) | JP3846558B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017121032A (en) * | 2015-06-30 | 2017-07-06 | 住友電気工業株式会社 | High frequency device |
| CN107516754A (en) * | 2017-04-28 | 2017-12-26 | 成都致力微波科技有限公司 | Binary channels microstrip circulator component |
| JP2019153892A (en) * | 2018-03-01 | 2019-09-12 | 三菱電機特機システム株式会社 | Microwave terminator |
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|---|---|---|---|---|
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| JPH01190003A (en) * | 1988-01-25 | 1989-07-31 | Matsushita Electric Ind Co Ltd | Strip line terminating circuit |
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| JPH06318804A (en) * | 1993-05-10 | 1994-11-15 | Mitsubishi Electric Corp | Resistive terminator |
| JPH07221509A (en) * | 1994-02-01 | 1995-08-18 | Hitachi Ltd | Microwave band terminator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5250140A (en) * | 1975-10-21 | 1977-04-21 | Mitsubishi Electric Corp | Terminal unit |
| JPS5483835U (en) * | 1977-11-25 | 1979-06-14 | ||
| JPS56145102U (en) * | 1980-04-02 | 1981-11-02 | ||
| JPS60144001A (en) * | 1984-01-05 | 1985-07-30 | Nec Corp | Terminating equipment |
| JPS6295002A (en) * | 1985-10-22 | 1987-05-01 | Nec Corp | Millimeter wave terminating equipment |
| JPS647701A (en) * | 1987-06-30 | 1989-01-11 | Nec Corp | Drop-in isolator |
| JPH01190003A (en) * | 1988-01-25 | 1989-07-31 | Matsushita Electric Ind Co Ltd | Strip line terminating circuit |
| JPH0253610U (en) * | 1988-10-12 | 1990-04-18 | ||
| JPH06152206A (en) * | 1992-11-10 | 1994-05-31 | Toshiba Corp | Reflectionless termination |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017121032A (en) * | 2015-06-30 | 2017-07-06 | 住友電気工業株式会社 | High frequency device |
| CN107516754A (en) * | 2017-04-28 | 2017-12-26 | 成都致力微波科技有限公司 | Binary channels microstrip circulator component |
| CN107516754B (en) * | 2017-04-28 | 2023-05-09 | 成都致力微波科技有限公司 | Dual-channel microstrip circulator component |
| JP2019153892A (en) * | 2018-03-01 | 2019-09-12 | 三菱電機特機システム株式会社 | Microwave terminator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3846558B2 (en) | 2006-11-15 |
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