JPH088660A - Phase control circuit for power synthesis - Google Patents
Phase control circuit for power synthesisInfo
- Publication number
- JPH088660A JPH088660A JP6142700A JP14270094A JPH088660A JP H088660 A JPH088660 A JP H088660A JP 6142700 A JP6142700 A JP 6142700A JP 14270094 A JP14270094 A JP 14270094A JP H088660 A JPH088660 A JP H088660A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- power
- signal
- input
- control circuit
- 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.)
- Granted
Links
- 230000015572 biosynthetic process Effects 0.000 title abstract 3
- 238000003786 synthesis reaction Methods 0.000 title abstract 3
- 230000010363 phase shift Effects 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000007796 conventional method Methods 0.000 description 3
- 230000002194 synthesizing effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電力合成形電力増幅装
置における各ルートの位相を揃える電力合成用位相制御
回路に関し、特に各電力増幅器出力の位相差による合成
出力電力の低下を防止する位相制御回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power combining phase control circuit for aligning the phases of respective routes in a power combining type power amplifying device, and more particularly to a phase for preventing a decrease in combined output power due to a phase difference between respective power amplifier outputs. Regarding the control circuit.
【０００２】[0002]
【従来の技術】図２は従来の電力合成形電力増幅装置を
示す回路ブロック図である。図において、１は入力端
子、２はハイブリッド配分器、３，４は電力増幅器、５
はハイブリッド合成器、６は出力端子、７は可変移相
器、１１は方向性結合器、１２は検波器、１５は移相制
御回路である。2. Description of the Related Art FIG. 2 is a circuit block diagram showing a conventional power combining type power amplifier. In the figure, 1 is an input terminal, 2 is a hybrid distributor, 3 and 4 are power amplifiers, 5
Is a hybrid combiner, 6 is an output terminal, 7 is a variable phase shifter, 11 is a directional coupler, 12 is a detector, and 15 is a phase shift control circuit.
【０００３】従来の位相合成回路においては、図２に示
すように合成出力部に方向性結合器１１を備え、検波器
１２によって出力電力を検出し、その値が最大になるよ
うに移相制御回路１５と片方又は双方のルートに挿入し
た可変移相器７により位相を制御していた（特開平２−
３０３２０７号公報、特開昭６１−２６２３０８号公
報、特開昭６１−２６２３０９号公報、特開昭６４−０
２２１０３号公報）。図３は従来の別の電力合成形電力
増幅装置を示す回路ブロック図である。本図に示す例で
は、図２の回路に加えて入力信号電力を検出する為の方
向性結合器１３と検波器１４を備えており、出力電力が
変動した場合、出力部の方向性結合器１１により検出さ
れた合成出力電力の変動分から、入力電力の変動分を差
し引くことで、各ルートの位相差による変動分だけを帰
還して可変位相器７を制御して最大の合成電力を得よう
としている（特開平２−１８４１０７号公報）。In the conventional phase synthesizing circuit, as shown in FIG. 2, a directional coupler 11 is provided in the synthesizing output section, the output power is detected by the detector 12, and the phase shift control is performed so that the value becomes maximum. The phase was controlled by the circuit 15 and the variable phase shifter 7 inserted in one or both routes (JP-A-2-
No. 303207, No. 61-262308, No. 61-262309, and No. 64-0.
22103). FIG. 3 is a circuit block diagram showing another conventional power combining type power amplifying device. In the example shown in this figure, in addition to the circuit of FIG. 2, a directional coupler 13 and a detector 14 for detecting the input signal power are provided, and when the output power fluctuates, the directional coupler of the output section is provided. By subtracting the fluctuation of the input power from the fluctuation of the combined output power detected by 11, the variable phase shifter 7 is controlled by feeding back only the fluctuation due to the phase difference of each route to obtain the maximum combined power. (JP-A-2-184107).
【０００４】図４は従来の更に別の電力合成形電力増幅
装置を示す回路ブロック図である。本図の回路では、出
力電力ではなく、各ルートの位相差を位相差検出・制御
回路９により検出し、その信号によって片方のルートに
挿入した可変移相器７を制御してルート間の位相差によ
る合成出力電力の低下を防止していた（特開昭６２−８
２８０４号公開、特開昭６３−５４８１０号公開）。FIG. 4 is a circuit block diagram showing another conventional power combining type power amplifying apparatus. In the circuit of this figure, not the output power but the phase difference of each route is detected by the phase difference detection / control circuit 9, and the signal is used to control the variable phase shifter 7 inserted in one route to control the position between the routes. The combined output power was prevented from decreasing due to the phase difference (Japanese Patent Laid-Open No. 62-8).
2804, JP-A-63-54810).
【０００５】[0005]
【発明が解決しようとする課題】以上の従来の電力合成
形電力増幅装置のうち、図２の回路では、出力電力を検
出して可変移相器７における移相量を制御しているの
で、入力電力の変化や、電力増幅器３，４の利得変化に
よる出力電力の変化に対しても移相制御回路１５が応答
し、可変移相器７における移相量を変化させてしまう
為、入力電力の変化や増幅器３，４の利得変化に対して
その都度制御回路の設定を変更して出力電力の調整を行
う必要があった。Among the above conventional power combiner type power amplifiers, the circuit of FIG. 2 detects the output power and controls the amount of phase shift in the variable phase shifter 7. The phase shift control circuit 15 responds to changes in the input power and changes in the output power due to changes in the gains of the power amplifiers 3 and 4, and changes the amount of phase shift in the variable phase shifter 7. It has been necessary to adjust the output power by changing the setting of the control circuit in response to the change in the output voltage and the change in the gain of the amplifiers 3 and 4.
【０００６】また図３の回路においては入力電力の変化
分を差し引いて制御することができるが、出力電力を検
出していることにおいては図２の回路と変わりがないの
で、電力増幅器３，４の温度特性や経年変化による１ｄ
Ｂ以下の出力電力変化に対してさえも数１０°の位相差
を与えるように可変移相器７の移相量を制御してしまう
（１ｄＢの電力変化は約５５°の位相差に相当する）。
通常の運用で増幅器３，４の利得変動による０．５ｄＢ
以下の出力変動については増幅器３，４の利得の設定変
更行わずに使用することが多い。つまり、図３の回路に
おいては増幅器３，４の利得変化による実際には問題に
ならない微妙な出力変化に対しても位相を大きく変化さ
せてしまう。The circuit of FIG. 3 can be controlled by subtracting the change in the input power, but since the output power is the same as that of the circuit of FIG. 2, the power amplifiers 3, 4 can be controlled. 1d due to temperature characteristics and aging
The amount of phase shift of the variable phase shifter 7 is controlled so as to give a phase difference of several tens of degrees even for an output power change of B or less (a power change of 1 dB corresponds to a phase difference of about 55 °). ).
0.5 dB due to gain variation of amplifiers 3 and 4 in normal operation
The following output fluctuations are often used without changing the gain settings of the amplifiers 3 and 4. That is, in the circuit of FIG. 3, the phase is changed greatly even for a subtle output change that does not actually cause a problem due to the gain changes of the amplifiers 3 and 4.
【０００７】図４の回路はルート間の位相差を検出して
移相器を制御するので図２及び図３について述べたのよ
うな問題は解決されている。しかしながら電力増幅器
３，４における起動時等の過渡的な位相変化や、温度変
化および経年変化による位相の変化に対して、各々のル
ートの変化の合計分の制御が必要であった。つまり２つ
の電力増幅器３，４の位相変化が進みθ1と遅れθ2との
逆方向であった場合、片方のルートに挿入された可変移
相器７による移相量としては（θ1＋θ2）が必要であ
る。Since the circuit of FIG. 4 detects the phase difference between the routes and controls the phase shifter, the problems as described with reference to FIGS. 2 and 3 have been solved. However, it is necessary to control the total change of each route with respect to a transient phase change in the power amplifiers 3 and 4 at the time of starting, etc., and a phase change due to temperature change and secular change. That is, when the phase changes of the two power amplifiers 3 and 4 are in the opposite directions of the advance θ 1 and the delay θ 2 , the phase shift amount by the variable phase shifter 7 inserted in one route is (θ 1 + θ 2 ) is required.
【０００８】位相差検出回路を実現する一つの具体例と
して、方向性結合器と逆極性の検波器、及び直流増幅器
により構成するものがあるが（特開昭６２−８２８０４
号公報）、その制御範囲は±９０°に制限されている。
つまり実際の制御範囲が非常に狭い為、前述のように各
電力増幅器の位相変化が逆方向になった場合には、制御
範囲を免脱したり、片方のルートの位相器で両方のルー
ト間の位相差を制御するので検出回路の特性によっては
ループ全体が負帰還から正帰還に変化し制御不能となる
ことがある。As one specific example for realizing the phase difference detection circuit, there is one which is composed of a directional coupler, a detector having a reverse polarity, and a DC amplifier (Japanese Patent Laid-Open No. 62-82804).
No.), the control range is limited to ± 90 °.
In other words, since the actual control range is very narrow, if the phase change of each power amplifier goes in the opposite direction as described above, the control range may be escaped or the phase shifter of one route may cause a difference between both routes. Since the phase difference is controlled, the entire loop may change from negative feedback to positive feedback and become uncontrollable depending on the characteristics of the detection circuit.
【０００９】[0009]
【課題を解決するための手段】前述の課題を解決するた
めに本発明は次の手段を提供する。In order to solve the above problems, the present invention provides the following means.
【００１０】入力信号をｎ個の信号路に分岐する分岐
手段と、該分岐手段で分岐された前記入力信号を前記各
信号路からそれぞれ受けるｎ個の電力増幅器と、該ｎ個
の電力増幅器の出力を合成する合成手段とを備えてなる
電力合成形電力増幅装置に設けられ、該ｎ個の電力増幅
器から出力される信号の位相を揃える電力合成用位相制
御回路のおいて、前記各電力増幅器の入力側の前記信号
路にそれぞれ挿入され、移相量制御信号入力端子に入力
される移相量制御信号に応じて前記信号路における前記
入力信号の移相をする移相器と、前記分岐手段に入力さ
れる前記入力信号と前記各電力増幅器の出力信号との位
相差をそれぞれ検出し、該位相差と所定値との誤差に応
じて前記移相量制御信号を生成し、対応する前記可変移
相器に該移相量制御信号をそれぞれ供給するｎ個の位相
差検出・制御回路とを備え、前記各位相差検出・制御回
路は前記移相量制御信号により前記誤差をほぼ零にする
ことを特徴とする電力合成用位相制御回路。Branching means for branching the input signal into n signal paths; n power amplifiers for receiving the input signals branched by the branching path from the respective signal paths; and n power amplifiers. Each of the power amplifiers in a power combining phase control circuit provided in a power combining type power amplifying device including a combining means for combining outputs, and aligning phases of signals output from the n power amplifiers. A phase shifter that is inserted in each of the signal paths on the input side and that shifts the phase of the input signal in the signal path according to a phase shift amount control signal input to a phase shift amount control signal input terminal; Detecting the phase difference between the input signal input to the means and the output signal of each power amplifier, generating the phase shift amount control signal according to the error between the phase difference and a predetermined value, and corresponding Controlling the amount of phase shift in the variable phase shifter And n phase difference detection / control circuits for respectively supplying signals, each phase difference detection / control circuit making the error substantially zero by the phase shift amount control signal. circuit.
【００１１】前記分岐手段がハイブリッド分配器であ
ることを特徴とする上記に記載の電力合成用位相制御
回路。The phase control circuit for power combination as described above, wherein the branching means is a hybrid distributor.
【００１２】前記合成手段がハイブリッド合成器であ
ることを特徴とする上記又はに記載の電力合成用位
相制御回路。The phase control circuit for power combination according to the above or the above, wherein the combining means is a hybrid combiner.
【００１３】前記移相量制御信号が、前記誤差に比例
した直流電圧であることえを特徴とする上記，又は
に記載の電力合成用位相制御回路。The phase control circuit for power combination according to the above or the above, wherein the phase shift amount control signal is a DC voltage proportional to the error.
【００１４】[0014]
【実施例】次に本発明について図面を参照して説明す
る。図１は本発明の一実施例を示す回路ブロック図であ
る。この実施例では、入力端子１に入力されたＲＦ信号
は、ハイブリッド分配器２で２分岐された後に、可変移
相器７，８を経て電力増幅器３，４それぞれに入力され
る。両電力増幅器３，４で増幅された信号は、ハイブリ
ッド合成器５でなる電力合成手段により電力合成され、
出力端子６から出力される。この際、電力増幅器３のル
ートについては、入力信号と増幅器出力の位相差を位相
差検出・制御回路９にて検出し、その位相差と所定値と
の差を誤差とし、この誤差を現わす信号として移相量制
御信号を生成する。この移相量制御信号は、直流電圧の
信号であり、可変移相器７の移相量制御信号入力端子へ
入力される。その移相量制御信号により増幅器入力部に
おける可変移相器７の移相量が調整されて、入力端子１
における信号の位相と電力増幅器３の出力における信号
の位相の差がψ1となるように制御される。また電力増
幅器４のルートについても同様に位相差検出・制御回路
１０と可変移相器８とによっての入出力間の位相差がψ
2となるように制御される。The present invention will be described below with reference to the drawings. FIG. 1 is a circuit block diagram showing an embodiment of the present invention. In this embodiment, the RF signal input to the input terminal 1 is branched into two by the hybrid distributor 2 and then input to the power amplifiers 3 and 4 via the variable phase shifters 7 and 8. The signals amplified by both the power amplifiers 3 and 4 are power-combined by the power combining means composed of the hybrid combiner 5,
It is output from the output terminal 6. At this time, regarding the route of the power amplifier 3, the phase difference between the input signal and the amplifier output is detected by the phase difference detection / control circuit 9, and the difference between the phase difference and a predetermined value is taken as an error, and this error is shown. A phase shift amount control signal is generated as a signal. The phase shift amount control signal is a DC voltage signal and is input to the phase shift amount control signal input terminal of the variable phase shifter 7. The phase shift amount control signal adjusts the phase shift amount of the variable phase shifter 7 in the amplifier input section, and the input terminal 1
The difference between the phase of the signal at 1 and the phase of the signal at the output of the power amplifier 3 is controlled to be ψ 1 . Similarly, regarding the route of the power amplifier 4, the phase difference between the input and output by the phase difference detection / control circuit 10 and the variable phase shifter 8 is ψ.
It is controlled to be 2.
【００１５】この実施例において、位相差検出・制御回
路９，１０で設定される入出力間の位相差をψ1＝ψ2＝
ψ0となるように設定すれば、ハイブリッド合成器５に
入力される信号は同相となるので、出力端子６から出力
される合成出力は最大となる。このψ0が前述の所定値
に相当する。In this embodiment, the phase difference between the input and the output set by the phase difference detection / control circuits 9 and 10 is ψ 1 = ψ 2 =
If ψ 0 is set, the signals input to the hybrid combiner 5 have the same phase, so that the combined output output from the output terminal 6 becomes maximum. This ψ 0 corresponds to the above-mentioned predetermined value.
【００１６】本実施例においては各ルート毎に位相制御
ループを備えているので、各々の制御範囲については、
他方の系の影響を受けずに全範囲にわたって補償可能で
ある。また、各電力増幅器３または４に位相変化があっ
たとしても、そのルートの制御ループ内で帰還および制
御がされるので、系の安定性が得られる。In this embodiment, since a phase control loop is provided for each route, each control range is
It is possible to compensate over the entire range without being affected by the other system. Further, even if there is a phase change in each power amplifier 3 or 4, feedback and control are performed within the control loop of that route, so that system stability can be obtained.
【００１７】[0017]
【発明の効果】以上に説明したように、本発明によれ
ば、電力合成用位相制御に関して、各々のルート毎に、
その入出力間の位相差を検出して移相を制御するループ
を備えることにより、入力信号のレベル変化や電力増幅
器の利得変化等の位相差によるもの以外の出力変化に対
して誤制御が掛かることもなく、位相差による出力変化
に対しても安定で且つ広い有効制御範囲を有する制御回
路を実現できる。As described above, according to the present invention, regarding the phase control for power combination, for each route,
By providing a loop that controls the phase shift by detecting the phase difference between the input and output, erroneous control is applied to output changes other than those due to phase differences such as input signal level changes and power amplifier gain changes. Also, it is possible to realize a control circuit which is stable against an output change due to the phase difference and has a wide effective control range.
【図１】本発明の一実施例を示す回路ブロック図。FIG. 1 is a circuit block diagram showing one embodiment of the present invention.
【図２】従来技術の一例を示す回路ブロック図。FIG. 2 is a circuit block diagram showing an example of a conventional technique.
【図３】従来技術の更に別の一例を示す回路ブロック
図。FIG. 3 is a circuit block diagram showing still another example of the conventional technique.
【図４】従来技術の更に別の一例を示す回路ブロック
図。FIG. 4 is a circuit block diagram showing still another example of the conventional technique.
１ 入力端子 ２ ハイブリッド分配器 ３，４ 電力増幅器 ５ ハイブリッド合成器 ６ 出力端子 ７，８ 可変移相器 ９，１０ 位相差検出・制御回路 １１，１３ 方向性結合器 １２，１４ 検波器 １５ 移相制御回路 1 Input Terminal 2 Hybrid Distributor 3,4 Power Amplifier 5 Hybrid Combiner 6 Output Terminal 7,8 Variable Phase Shifter 9,10 Phase Difference Detection / Control Circuit 11,13 Directional Coupler 12,14 Detector 15 Phase Shifter Control circuit
Claims (4)
段と、該分岐手段で分岐された前記入力信号を前記各信
号路からそれぞれ受けるｎ個の電力増幅器と、該ｎ個の
電力増幅器の出力を合成する合成手段とを備えてなる電
力合成形電力増幅装置に設けられ、該ｎ個の電力増幅器
から出力される信号の位相を揃える電力合成用位相制御
回路のおいて、 前記各電力増幅器の入力側の前記信号路にそれぞれ挿入
され、移相量制御信号入力端子に入力される移相量制御
信号に応じて前記信号路における前記入力信号の移相を
する移相器と、 前記分岐手段に入力される前記入力信号と前記各電力増
幅器の出力信号との位相差をそれぞれ検出し、該位相差
と所定値との誤差に応じて前記移相量制御信号を生成
し、対応する前記可変移相器に該移相量制御信号をそれ
ぞれ供給するｎ個の位相差検出・制御回路とを備え、 前記各位相差検出・制御回路は前記移相量制御信号によ
り前記誤差をほぼ零にすることを特徴とする電力合成用
位相制御回路。1. Branching means for branching an input signal into n signal paths, n power amplifiers respectively receiving the input signal branched by the branching means from each of the signal paths, and n powers. A power combining type phase control circuit provided in a power combining type power amplifying device including a combining means for combining the outputs of the amplifiers, and aligning the phases of the signals output from the n power amplifiers, A phase shifter that is inserted into each of the signal paths on the input side of the power amplifier and shifts the phase of the input signal in the signal path according to the phase shift amount control signal input to the phase shift amount control signal input terminal, The phase difference between the input signal input to the branching unit and the output signal of each power amplifier is detected, and the phase shift amount control signal is generated according to the error between the phase difference and a predetermined value. To the variable phase shifter And n phase difference detecting / controlling circuits for respectively supplying signals, each phase difference detecting / controlling circuit making the error substantially zero by the phase shift amount control signal. circuit.
ことを特徴とする請求項１に記載の電力合成用位相制御
回路。2. The phase control circuit for power combination according to claim 1, wherein the branching means is a hybrid distributor.
ことを特徴とする請求項１又は２に記載の電力合成用位
相制御回路。3. The power combining phase control circuit according to claim 1, wherein the combining means is a hybrid combiner.
た直流電圧であることえを特徴とする請求項１，２又は
３に記載の電力合成用位相制御回路。4. The phase control circuit for power combination according to claim 1, wherein the phase shift amount control signal is a DC voltage proportional to the error.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6142700A JP2522201B2 (en) | 1994-06-24 | 1994-06-24 | Phase control circuit for power synthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6142700A JP2522201B2 (en) | 1994-06-24 | 1994-06-24 | Phase control circuit for power synthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH088660A true JPH088660A (en) | 1996-01-12 |
| JP2522201B2 JP2522201B2 (en) | 1996-08-07 |
Family
ID=15321528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6142700A Expired - Lifetime JP2522201B2 (en) | 1994-06-24 | 1994-06-24 | Phase control circuit for power synthesis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2522201B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002021685A1 (en) * | 2000-09-05 | 2002-03-14 | Mitsubishi Denki Kabushiki Kaisha | High-frequency amplifier, feed-forward amplifier and distortion compensation amplifier |
| WO2003065494A1 (en) * | 2002-01-31 | 2003-08-07 | Kabushiki Kaisha Toshiba | Microwave shifter and power amplifier |
| WO2005034350A1 (en) * | 2003-09-30 | 2005-04-14 | Mitsubishi Denki Kabushiki Kaisha | Variable power distributor, its error detecting method and set value correcting method |
| WO2010052901A1 (en) * | 2008-11-10 | 2010-05-14 | 三菱電機株式会社 | Variable frequency amplifier |
| JP2010141833A (en) * | 2008-12-15 | 2010-06-24 | Yagi Antenna Co Ltd | Phase control device for phased array antenna |
| WO2012133470A1 (en) * | 2011-03-25 | 2012-10-04 | 日本電気株式会社 | Phase adjustment circuit and phase adjustment method |
| DE102023211011A1 (en) | 2023-11-07 | 2025-05-08 | Robert Bosch Gesellschaft mit beschränkter Haftung | Phase shifter device and method for shifting a phase of a signal |
-
1994
- 1994-06-24 JP JP6142700A patent/JP2522201B2/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002076781A (en) * | 2000-09-05 | 2002-03-15 | Mitsubishi Electric Corp | High frequency amplifier, feed forward amplifier and distortion compensation amplifier |
| WO2002021685A1 (en) * | 2000-09-05 | 2002-03-14 | Mitsubishi Denki Kabushiki Kaisha | High-frequency amplifier, feed-forward amplifier and distortion compensation amplifier |
| US6894562B2 (en) | 2000-09-05 | 2005-05-17 | Mitsubishi Denki Kabushiki Kaisha | High-frequency amplifier, feed-forward amplifier and distortion compensating amplifier |
| US6965269B2 (en) | 2002-01-31 | 2005-11-15 | Kabushiki Kaisha Toshiba | Microwave phase shifter having an active layer under the phase shifting line and power amplifier using such a phase shifter |
| WO2003065494A1 (en) * | 2002-01-31 | 2003-08-07 | Kabushiki Kaisha Toshiba | Microwave shifter and power amplifier |
| EP1670092A4 (en) * | 2003-09-30 | 2007-05-16 | Mitsubishi Electric Corp | VARIABLE POWER DISTRIBUTOR AND ITS ERROR DETECTION METHOD, AND VALUE CORRECTION METHOD |
| WO2005034350A1 (en) * | 2003-09-30 | 2005-04-14 | Mitsubishi Denki Kabushiki Kaisha | Variable power distributor, its error detecting method and set value correcting method |
| US7587652B2 (en) | 2003-09-30 | 2009-09-08 | Mitsubishi Denki Kabushiki Kaisha | Variable power distributor, error detection method thereof, and set value correction method |
| WO2010052901A1 (en) * | 2008-11-10 | 2010-05-14 | 三菱電機株式会社 | Variable frequency amplifier |
| JP5111614B2 (en) * | 2008-11-10 | 2013-01-09 | 三菱電機株式会社 | Variable frequency amplifier |
| US8416018B2 (en) | 2008-11-10 | 2013-04-09 | Mitsubishi Electric Corporation | Variable frequency amplifier |
| JP2010141833A (en) * | 2008-12-15 | 2010-06-24 | Yagi Antenna Co Ltd | Phase control device for phased array antenna |
| WO2012133470A1 (en) * | 2011-03-25 | 2012-10-04 | 日本電気株式会社 | Phase adjustment circuit and phase adjustment method |
| DE102023211011A1 (en) | 2023-11-07 | 2025-05-08 | Robert Bosch Gesellschaft mit beschränkter Haftung | Phase shifter device and method for shifting a phase of a signal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2522201B2 (en) | 1996-08-07 |
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Legal Events
| Date | Code | Title | Description |
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| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960402 |