JPS61139110A - Variable attenuator - Google Patents
Variable attenuatorInfo
- Publication number
- JPS61139110A JPS61139110A JP26047384A JP26047384A JPS61139110A JP S61139110 A JPS61139110 A JP S61139110A JP 26047384 A JP26047384 A JP 26047384A JP 26047384 A JP26047384 A JP 26047384A JP S61139110 A JPS61139110 A JP S61139110A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- pin diode
- resistance value
- diodes
- attenuation
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/24—Frequency- independent attenuators
- H03H7/25—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable
- H03H7/253—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable the element being a diode
- H03H7/255—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable the element being a diode the element being a PIN diode
Landscapes
- Non-Reversible Transmitting Devices (AREA)
- Attenuators (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は可変抵抗素子としてＰＩＮダイオードを用い
た可変減衰器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a variable attenuator using a PIN diode as a variable resistance element.
従来、ＰＩＮダイオードを可変抵抗素子として用いた可
変減衰器としては、ブリッジドＴ形可変減衰器が広く知
られている。第４図にその従来のブリッジドＴ形減衰器
の構成例を示す。入力端子１１及び出力端子１２は直流
阻止コンデンサ１３−ＰＩＮダイオード１４−直流阻止
コンデンサ１５を通じて互に接続され、Ｐ工Ｎダイオー
ド１４の陽極は回路系インピーダンスと等しい抵抗値を
もつ抵抗素子１６を通じてＰＩＮダイオード１７の陰極
に接続される。ＰＩＮダイオード１４の陰極は直流阻止
コンデンサ１８を通じ、更に回路系インピーダンスと等
しい抵抗値をもつ抵抗素子１９を通じてＰＩＮダイオー
ド１７の陰極に接続される。ＰＩＮダイオード１７の陽
極は接地される。ＰＩＮダイオード１４の陽極及びＰＩ
Ｎダイオード１７の陰極はそれぞれ高周波阻止チョーク
コイル２１及び２２を通じて直流電圧端子２３に接続さ
れる。Conventionally, a bridged T-type variable attenuator is widely known as a variable attenuator using a PIN diode as a variable resistance element. FIG. 4 shows an example of the configuration of the conventional bridged T-type attenuator. The input terminal 11 and the output terminal 12 are connected to each other through a DC blocking capacitor 13, a PIN diode 14, and a DC blocking capacitor 15. 17 cathodes. The cathode of the PIN diode 14 is connected to the cathode of the PIN diode 17 through a DC blocking capacitor 18 and further through a resistance element 19 having a resistance value equal to the circuit system impedance. The anode of the PIN diode 17 is grounded. Anode of PIN diode 14 and PI
The cathode of the N diode 17 is connected to a DC voltage terminal 23 through high frequency blocking choke coils 21 and 22, respectively.
ＰＩＮダイオード１４の陰極は高周波阻止チョークコイ
ル２４を通じて直流電圧端子２５に接続される。The cathode of the PIN diode 14 is connected to a DC voltage terminal 25 through a high frequency blocking choke coil 24 .
上述した従来のブリッジドＴ形可変減衰器では、入出力
インピーダンスを一定値とするためには、ＰＩＮダイオ
ードに直流電圧を供給する端子２３ 、２５に、それぞ
れ相関があり別の値をもつ電圧を供給する必要があり、
これを実現するために複雑な電圧制御回路が必要となる
欠点があった。In the conventional bridged T-type variable attenuator described above, in order to maintain input and output impedance at a constant value, voltages having different values that are correlated to each other are supplied to the terminals 23 and 25 that supply DC voltage to the PIN diode. It is necessary to
There was a drawback that a complicated voltage control circuit was required to realize this.
この発明によれば、２つのＰＩＮダイオードの抵抗値が
常に同一の状態で可変減衰器として動作するような構成
とし、その２つのＰＩＮダイオードに同一の制御電流を
流すように直流電流通路を構成としている。つまり入出
力端子間に、回路系インピータンスと等しい抵抗の抵抗
素子と第１のＰＩＮクイオードとの直列回路が接続され
、その直列回路と並列に２分の１波長線路が接続され、
その２分の１波長線路の中点は第２のＰＩＮダイオード
を通じて接地される。これら第１．第２のＰＩＮダイオ
ードに直列に同一の制御電流を流す直流電流通路が構成
される。According to this invention, the two PIN diodes are configured to operate as a variable attenuator with the same resistance value at all times, and the DC current path is configured so that the same control current flows through the two PIN diodes. There is. In other words, between the input and output terminals, a series circuit consisting of a resistive element with a resistance equal to the circuit impedance and the first PIN diode is connected, and a 1/2 wavelength line is connected in parallel with the series circuit.
The midpoint of the half-wavelength line is grounded through a second PIN diode. These first. A direct current path is configured to flow the same control current in series with the second PIN diode.
第１図はこの発明の一実施例を示す。入力端子１１及び
出力端子１２間には、回路系インピーダンスと等しい抵
抗値の抵抗素子２６とＰＩＮダイオード１４゛との直列
回路が接続され、この直列回路の両端（こ直流阻止コン
デンサ１３ 、１５が挿入される。また回路系インピー
ダンスの６倍の特性インピーダンスをもつ４分の１波長
線路２７ 、２８の直列接続が、前記直列回路と並列に
接続され、４分の１波長線路２７ 、２８の接続点はＰ
ＩＮダイオード１７を介して接地されている。４分の１
波長線路２８とＰＩＮダイオード１４の陽極との間に直
流阻止コンデンサ１８が挿入される。またＰＩＮダイオ
ード１４の陽極は高周波阻止チョークコイル２１を通じ
て電圧端子２３に接続される。 ″
２つのＰＩＮダイオード１４ 、１７に流れる電流が零
で抵抗値が無限大となったときの第１図の回路の高周波
等価回路を第２図Ａに示す。この回路は、入力端子１１
及び出力端子１２の間に、線路２７ 、２８よりなる２
分の１波長線路２９が接続されているだけであるから減
衰量は零となる。２つのＰＩＮダイオード１４ 、１７
の抵抗値が回路系インピーダンスＺ０ト等しくなった場
合の第１図の等何回路を第２図ＢＩこ示す。この回路は
人出端子間に２Ｚ０の抵抗素子が接続され、その両端は
それぞれ４分の１波長の線路を通じ更に共通の２６の抵
抗素子を通じて接地され、ウィルキンソン（Ｗｉ １ｋ
ｉｎｓｏｎ ）形の電力分配器と全く同じ構成であり、
入力端子１１及び出力端子１２は互にアイソレーション
ポートとなるから、減衰量は無限大となる。FIG. 1 shows an embodiment of the invention. A series circuit consisting of a resistor element 26 with a resistance value equal to the circuit impedance and a PIN diode 14 is connected between the input terminal 11 and the output terminal 12, and DC blocking capacitors 13 and 15 are inserted at both ends of this series circuit. Further, a series connection of quarter wavelength lines 27 and 28 having a characteristic impedance six times the circuit system impedance is connected in parallel with the series circuit, and a connection point of quarter wavelength lines 27 and 28 is connected in parallel with the series circuit. is P
It is grounded via an IN diode 17. one quarter
A DC blocking capacitor 18 is inserted between the wavelength line 28 and the anode of the PIN diode 14. Further, the anode of the PIN diode 14 is connected to a voltage terminal 23 through a high frequency blocking choke coil 21. ``A high-frequency equivalent circuit of the circuit shown in FIG. 1 when the current flowing through the two PIN diodes 14 and 17 is zero and the resistance value is infinite is shown in FIG. 2A.
2 consisting of lines 27 and 28 between the output terminal 12 and the output terminal 12
Since only the 1/1 wavelength line 29 is connected, the amount of attenuation is zero. Two PIN diodes 14, 17
The equivalent circuit of FIG. 1 is shown in FIG. 2 when the resistance value of Z0 becomes equal to the circuit system impedance Z0. In this circuit, a 2Z0 resistive element is connected between the output terminals, and both ends of the resistive element are connected to each other through a quarter-wavelength line and further grounded through a common 26 resistive elements.
It has exactly the same configuration as the inson ) type power divider,
Since the input terminal 11 and the output terminal 12 mutually serve as isolation ports, the amount of attenuation is infinite.
以上の事を定量的に計算した減衰量と入出力インピーダ
ンスのデータを第３図に示す。第３図によれば、中心周
波数±８チの帯域内において２０ｄＢ以上の減衰量およ
び２０ｄＢ以上の反射損失という良好な特性が得られる
。Figure 3 shows the attenuation and input/output impedance data that were quantitatively calculated for the above. According to FIG. 3, good characteristics such as an attenuation amount of 20 dB or more and a return loss of 20 dB or more can be obtained within the band of ±8 inches of the center frequency.
この発明の可変減衰器では、２つのＰＩＮダイオード１
４ 、１７の抵抗値は常に等しい値で動作するように構
成されているので、同一の電流が流れるように直流的に
２つのＰＩＮダイオード１４ 、１７が直列接続され、
１つの制御電流により減衰量を変化することが出来る。In the variable attenuator of this invention, two PIN diodes 1
Since the resistance values of 4 and 17 are configured to always operate at the same value, the two PIN diodes 14 and 17 are connected in series so that the same current flows.
The amount of attenuation can be changed with one control current.
つまり電圧端子２３−高周波阻止チヨークコイル２ｌ−
ＰＩＮダイオード１４−抵抗素子２６−４分の１波長線
路２７−ＰＩＮダイオード１７−接地はＰＩＮダイオー
ド１４ 、１７に直列に同一の制御電流を流す直流電流
通路を構成している。In other words, voltage terminal 23 - high frequency blocking choke coil 2l -
The PIN diode 14, the resistive element 26, the quarter wavelength line 27, the PIN diode 17, and the ground form a direct current path through which the same control current flows in series with the PIN diodes 14 and 17.
以上説明したようにこの発明の可変減衰器は、特殊な電
圧制御回路を必要とせずに、良好な動作を可能とするこ
とができる効果がある。またこの発明の可変減衰器では
、ＰＩＮダイオードの抵抗値が多大の電流を必要とする
低い抵抗領域を使用しないので、消費電力が少ないとい
う特徴をも有する０As explained above, the variable attenuator of the present invention has the advantage of being able to operate favorably without requiring a special voltage control circuit. Furthermore, the variable attenuator of the present invention does not use a low resistance region where the resistance value of the PIN diode requires a large amount of current, so it also has the characteristic of low power consumption.
第１図はこの発明の一実施例を示す接続図、第２図Ａは
第１図においてＰＩＮダイオードの抵抗値が無限大とな
ったときの高周波等価回路図、第２図Ｂは第１図におい
てＰＩＮダイオードの抵抗値が回路系インピーダンスと
等しくなったときの高周波等価回路図、第３図はこの発
明の実施例における減衰特性と入出力端インピーダンス
特性との例を示す図、第４図は従来のブリッジドＴ形可
変減衰器を示す接続図である。
１１：入力端子、１２：出力端子、１３ 、１５ 、１
８ ：直流阻止コンデンサ、１４ 、１７ ： ＰＩＮ
ダイオード、２１：高周波阻止チョークコイル、２３：
電圧供給端子、２６：抵抗素子、２７．２８：４分の１
波長線路、２９：２分の１波長線路。
特許出願人 日本電気株式会社・
代 理 人 草 野 卓オ １ 図
示 ２ 図
矛 ３ 図
周シＩＬ数（ＧＨｚン
、１７４ 図Fig. 1 is a connection diagram showing one embodiment of the present invention, Fig. 2A is a high frequency equivalent circuit diagram when the resistance value of the PIN diode in Fig. 1 becomes infinite, and Fig. 2B is a diagram of the high frequency equivalent circuit shown in Fig. 1. A high frequency equivalent circuit diagram when the resistance value of the PIN diode becomes equal to the circuit impedance in FIG. FIG. 2 is a connection diagram showing a conventional bridged T-type variable attenuator. 11: Input terminal, 12: Output terminal, 13, 15, 1
8: DC blocking capacitor, 14, 17: PIN
Diode, 21: High frequency blocking choke coil, 23:
Voltage supply terminal, 26: Resistance element, 27.28: 1/4
Wavelength line, 29: Half wavelength line. Patent Applicant: NEC Corporation / Agent: Takuo Kusano 1 Illustration 2 Illustration 3 Number of illustrations (GHz, 174)
Claims (1)
衰器において、入力端子及び出力端子間に接続され、回
路系インピーダンスに等しい抵抗値をもつ抵抗素子と第
１のＰＩＮダイオードとの直列回路と、その直列回路と
並列に接続された２分の１波長線路と、その２分の１波
長線路の中点と接地との間に接続された第２のＰＩＮダ
イオードと、上記第１、第２のＰＩＮダイオードに直列
に同一の制御電流を流す直流電流通路とを具備する可変
減衰器。In a variable attenuator using a PIN diode as a variable resistance element, a series circuit of a first PIN diode and a resistance element connected between an input terminal and an output terminal and having a resistance value equal to the circuit system impedance, and the series circuit thereof. a 1/2 wavelength line connected in parallel with the 1/2 wavelength line, a second PIN diode connected between the midpoint of the 1/2 wavelength line and ground, and the first and second PIN diodes. A variable attenuator comprising a direct current path through which the same control current flows in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26047384A JPS61139110A (en) | 1984-12-10 | 1984-12-10 | Variable attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26047384A JPS61139110A (en) | 1984-12-10 | 1984-12-10 | Variable attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61139110A true JPS61139110A (en) | 1986-06-26 |
Family
ID=17348433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26047384A Pending JPS61139110A (en) | 1984-12-10 | 1984-12-10 | Variable attenuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61139110A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5453721A (en) * | 1994-06-09 | 1995-09-26 | Motorola, Inc. | Attenuator |
| US5477200A (en) * | 1993-12-27 | 1995-12-19 | Mitsubishi Denki Kabushiki Kaisha | Variable attenuator |
| JP2002071785A (en) * | 2000-08-28 | 2002-03-12 | Stanley Electric Co Ltd | DC voltage application circuit to high frequency line |
| US6522221B1 (en) | 1999-01-04 | 2003-02-18 | Nippon Telegraph And Telephone Corporation | Phase shifter, attenuator, and nonlinear signal generator |
| WO2006100726A1 (en) * | 2005-03-18 | 2006-09-28 | Fujitsu Limited | Variable attenuator and integrated circuit |
-
1984
- 1984-12-10 JP JP26047384A patent/JPS61139110A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5477200A (en) * | 1993-12-27 | 1995-12-19 | Mitsubishi Denki Kabushiki Kaisha | Variable attenuator |
| US5453721A (en) * | 1994-06-09 | 1995-09-26 | Motorola, Inc. | Attenuator |
| US6522221B1 (en) | 1999-01-04 | 2003-02-18 | Nippon Telegraph And Telephone Corporation | Phase shifter, attenuator, and nonlinear signal generator |
| JP2002071785A (en) * | 2000-08-28 | 2002-03-12 | Stanley Electric Co Ltd | DC voltage application circuit to high frequency line |
| JP4667567B2 (en) * | 2000-08-28 | 2011-04-13 | スタンレー電気株式会社 | DC voltage application circuit to high frequency lines |
| WO2006100726A1 (en) * | 2005-03-18 | 2006-09-28 | Fujitsu Limited | Variable attenuator and integrated circuit |
| US7453329B2 (en) | 2005-03-18 | 2008-11-18 | Fujitsu Limited | Variable attenuator and integrated circuit |
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