JP2011109260A

JP2011109260A - Phase control device

Info

Publication number: JP2011109260A
Application number: JP2009260162A
Authority: JP
Inventors: Kenji Nasu; 健二那須
Original assignee: Hitachi Kokusai Electric Inc
Current assignee: Hitachi Kokusai Electric Inc
Priority date: 2009-11-13
Filing date: 2009-11-13
Publication date: 2011-06-02

Abstract

<P>PROBLEM TO BE SOLVED: To provide a phase control device which sets an arbitrary phase to a high frequency signal to perform a control. <P>SOLUTION: The phase control device includes: a first coupler 13 which receives a first high frequency signal having a first phase (a phase) and branches and outputs this signal; a first phase shifter 15 which receives the first high frequency signal and shifts the phase in accordance with a first control signal; an RF processing part 5 which subjects the phase-shifted first high frequency signal to RF processing; a second coupler 14 which branches and outputs a second high frequency signal resulting from the RF processing and having a second phase (A phase); a second phase shifter 17 which receives the second high frequency signal to shift the phase in accordance with a second control signal and outputs a third high frequency signal having a third phase (x phase); a synthesizer 18 which outputs a difference signal between the first high frequency signal and the third high frequency signal; and a control part 10 which determines the first and second control signals on the basis of the difference signal so that a phase difference between the first phase (a phase) and the third phase (x phase) becomes the second phase (A phase) of the second high frequency signal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、高周波信号の位相を制御する位相制御装置であって、高周波信号の位相の変動を検出し任意の値に制御する位相制御装置に関する。 The present invention relates to a phase control apparatus that controls the phase of a high-frequency signal, and relates to a phase control apparatus that detects a change in the phase of a high-frequency signal and controls it to an arbitrary value.

従来から、高周波信号を扱う高周波システムにおいては、高周波信号の振幅や位相を制御することが行なわれている。すなわち、高周波信号においては、信号の位相調整のみによっても、振幅および位相の調整を行なうこともできるため、位相に対して、任意の制御を行なって所望の効果を得る技術が多く知られている。 Conventionally, in high frequency systems that handle high frequency signals, the amplitude and phase of the high frequency signals have been controlled. That is, in a high-frequency signal, the amplitude and phase can be adjusted only by adjusting the phase of the signal. Therefore, many techniques for obtaining a desired effect by arbitrarily controlling the phase are known. .

特許文献１は、位相を調整して信号の効率を最適化するプリディストーション回路を用いる振幅位相変化装置を開示している。 Patent Document 1 discloses an amplitude phase change device using a predistortion circuit that adjusts a phase to optimize the efficiency of a signal.

特開２００１−３２６５４１号公報JP 2001-326541 A

しかし、特許文献１の従来技術が示す振幅位相変化装置においては、通過し出力される高周波信号について、ユーザが希望する任意の位相を自由に設定したり位相の変動を検出して制御することはできないという問題がある。
本発明は、高周波信号に対し任意の位相を設定し変動を検出して制御する位相制御装置を提供することを目的とする。 However, in the amplitude phase change device shown in the prior art of Patent Document 1, it is not possible to freely set an arbitrary phase desired by the user or to detect and control the phase fluctuation of a high-frequency signal that passes through and is output. There is a problem that you can not.
It is an object of the present invention to provide a phase control device that sets an arbitrary phase for a high-frequency signal, detects the fluctuation, and controls the phase control device.

課題を解決する一実施形態は、
第１位相（ａ相）をもつ第１高周波信号を受けこれを二つに分岐して出力する第１結合器（１３）と、
前記第１結合器から供給された前記第１高周波信号を受けて、第１制御信号に従って移相して出力する第１移相器（１５）と、
前記第１移相器により移相された第１高周波信号にＲＦ（Radio Frequency）処理を施すＲＦ処理部（５）と、
前記ＲＦ処理部においてＲＦ処理が施された第２位相（Ａ相）をもつ第２高周波信号を受け二つに分岐して出力する第２結合器（１４）と、
前記第２結合器から供給された前記第２高周波信号を受けて、第２制御信号に従って移相して第３位相（ｘ相）をもつ第３高周波信号を出力する第２移相器（１７）と、
前記第１結合器からの第１高周波信号と前記第２移相器により移相された第３高周波信号とを合成して差分信号を出力する合成器（１８）と、
前記合成器からの差分信号に基づいて、前記第１位相（ａ相）と前記第３位相（ｘ相）との位相差が前記第２高周波信号の前記第２位相（Ａ相）となるように、前記第１移相器へ供給される前記第１制御信号と前記第２移相器に供給される第２制御信号を決定して供給する制御部（１０）と、を具備することを特徴とする位相制御装置である。 One embodiment to solve the problem is:
A first coupler (13) for receiving a first high-frequency signal having a first phase (a phase) and branching it into two and outputting it;
A first phase shifter (15) that receives the first high-frequency signal supplied from the first coupler, shifts the phase according to a first control signal, and outputs the phase-shifter (15);
An RF processing unit (5) for performing RF (Radio Frequency) processing on the first high-frequency signal phase-shifted by the first phase shifter;
A second coupler (14) for receiving a second high-frequency signal having a second phase (A phase) that has been subjected to RF processing in the RF processing section, and branching it into two and outputting it;
A second phase shifter (17) that receives the second high-frequency signal supplied from the second coupler, shifts the phase according to the second control signal, and outputs a third high-frequency signal having a third phase (x phase). )When,
A combiner (18) for combining the first high-frequency signal from the first combiner and the third high-frequency signal phase-shifted by the second phase shifter and outputting a differential signal;
Based on the difference signal from the combiner, the phase difference between the first phase (a phase) and the third phase (x phase) becomes the second phase (A phase) of the second high-frequency signal. And a controller (10) for determining and supplying the first control signal supplied to the first phase shifter and the second control signal supplied to the second phase shifter. This is a featured phase control device.

課題を解決する一実施形態は、
第１位相（ａ相）を受けこれを二つに分岐して出力する第１結合器（１３）と、
前記第１結合器から供給された前記第１高周波信号を受けて、第１制御信号に従って移相して出力する第１移相器（１５）と、
前記第１移相器により移相された第１高周波信号にＲＦ処理を施す第１ＲＦ処理部（４２）と、
前記第１ＲＦ処理部においてＲＦ処理が施された第２位相（Ａ相）をもつ第２高周波信号を受け二つに分岐して出力する第２結合器（１４）と、
前記第２結合器から供給された前記第２高周波信号を受けて、第２制御信号に従って移相して第３位相（ｘ相）をもつ第３高周波信号を出力する第２移相器（１７）と、
前記第１結合器からの第１高周波信号と前記第２移相器により移相された第３高周波信号とを合成して第１差分信号を出力する第１合成器（１８）と、
前記第１合成器からの第１差分信号に基づいて、前記第１位相（ａ相）と前記第３位相（ｘ相）との位相差が前記第２高周波信号の前記第２位相（Ａ相）となるように、前記第１移相器へ供給される前記第１制御信号と前記第２移相器に供給される第２制御信号を決定して供給する第１制御部（２０）と、
第１位相（ａ相）をもつ第４高周波信号を受けこれを二つに分岐して出力する第３結合器（３３）と、
前記第３結合器から供給された前記第４高周波信号を受けて、第３制御信号に従って移相して出力する第３移相器（３５）と、
前記第３移相器により移相された第４高周波信号にＲＦ処理を施す第２ＲＦ処理部（４３）と、
前記第２ＲＦ処理部においてＲＦ処理が施された第２位相（Ａ相）をもつ第５高周波信号を受け二つに分岐して出力する第４結合器（３４）と、
前記第４結合器から供給された前記第５高周波信号を受けて、第４制御信号に従って移相して第３位相（ｘ相）をもつ第６高周波信号を出力する第４移相器（３７）と、
前記第３結合器からの第４高周波信号と前記第４移相器により移相された第６高周波信号とを合成して差分信号を出力する第２合成器（３８）と、
前記第２合成器からの差分信号に基づいて、前記第１位相（ａ相）と前記第３位相（ｘ相）との位相差が前記第４高周波信号の前記第２位相（Ａ相）となるように、前記第３移相器へ供給される前記第３制御信号と前記第４移相器に供給される第４制御信号を決定して供給する第２制御部（２０）と、を具備することを特徴とする位相制御装置。 One embodiment to solve the problem is:
A first coupler (13) for receiving the first phase (a phase) and branching it into two, and outputting it;
A first phase shifter (15) that receives the first high-frequency signal supplied from the first coupler, shifts the phase according to a first control signal, and outputs the phase-shifter (15);
A first RF processing section (42) for performing RF processing on the first high-frequency signal phase-shifted by the first phase shifter;
A second coupler (14) for receiving a second high-frequency signal having a second phase (A phase) that has been subjected to RF processing in the first RF processing section, and bifurcating the second high frequency signal;
A second phase shifter (17) that receives the second high-frequency signal supplied from the second coupler, shifts the phase according to the second control signal, and outputs a third high-frequency signal having a third phase (x phase). )When,
A first combiner (18) for combining the first high-frequency signal from the first coupler and the third high-frequency signal phase-shifted by the second phase shifter and outputting a first differential signal;
Based on the first differential signal from the first combiner, the phase difference between the first phase (a phase) and the third phase (x phase) is the second phase (A phase) of the second high-frequency signal. And a first control unit (20) for determining and supplying the first control signal supplied to the first phase shifter and the second control signal supplied to the second phase shifter. ,
A third coupler (33) for receiving a fourth high-frequency signal having a first phase (a phase) and branching it into two and outputting it;
A third phase shifter (35) that receives the fourth high-frequency signal supplied from the third coupler, shifts the phase in accordance with a third control signal, and outputs the phase-shifted signal;
A second RF processing unit (43) for performing RF processing on the fourth high-frequency signal phase-shifted by the third phase shifter;
A fourth coupler (34) for receiving a fifth high-frequency signal having a second phase (A phase) subjected to RF processing in the second RF processing unit and branching it into two and outputting it;
A fourth phase shifter (37) which receives the fifth high frequency signal supplied from the fourth coupler and shifts the phase according to the fourth control signal to output a sixth high frequency signal having a third phase (x phase). )When,
A second combiner (38) for combining the fourth high-frequency signal from the third coupler and the sixth high-frequency signal phase-shifted by the fourth phase shifter to output a differential signal;
Based on the difference signal from the second synthesizer, the phase difference between the first phase (a phase) and the third phase (x phase) is the second phase (A phase) of the fourth high-frequency signal. A second control unit (20) for determining and supplying the third control signal supplied to the third phase shifter and the fourth control signal supplied to the fourth phase shifter. A phase control apparatus comprising:

課題を解決する一実施形態は、
第１位相（ａ相）をもつ第１高周波信号を受けこれを二つに分岐して出力する第１結合器（１３）と、
前記第１結合器から供給された前記第１高周波信号を受けて、第１制御信号に従って移相して出力する第１移相器（１５）と、
前記第１移相器により移相された第１高周波信号を減衰処理する減衰部（４１）と、
前記減衰部により減衰された第１高周波信号にＲＦ処理を施すＲＦ処理部（５）と、
前記ＲＦ処理部においてＲＦ処理が施された第２位相（Ａ相）をもつ第２高周波信号を受け二つに分岐して出力する第２結合器（１４）と、
前記第２結合器から供給された前記第２高周波信号を受けて、第２制御信号に従って移相して第３位相（ｘ相）をもつ第３高周波信号を出力する第２移相器（１７）と、
前記第１結合器からの第１高周波信号と前記第２移相器により移相された第３高周波信号とを合成して差分信号を出力する合成器（１８）と、
前記合成器からの差分信号に基づいて、前記第１位相（ａ相）と前記第３位相（ｘ相）との位相差が前記第２高周波信号の前記第２位相（Ａ相）となるように、前記第１移相器へ供給される前記第１制御信号と前記第２移相器に供給される第２制御信号を決定して供給する制御部（１０）と、を具備することを特徴とする位相制御装置である。 One embodiment to solve the problem is:
A first coupler (13) for receiving a first high-frequency signal having a first phase (a phase) and branching it into two and outputting it;
A first phase shifter (15) that receives the first high-frequency signal supplied from the first coupler, shifts the phase according to a first control signal, and outputs the phase-shifter (15);
An attenuation unit (41) for performing attenuation processing on the first high-frequency signal phase-shifted by the first phase shifter;
An RF processing unit (5) for performing RF processing on the first high-frequency signal attenuated by the attenuation unit;
A second coupler (14) for receiving a second high-frequency signal having a second phase (A phase) that has been subjected to RF processing in the RF processing section, and branching it into two and outputting it;
A second phase shifter (17) that receives the second high-frequency signal supplied from the second coupler, shifts the phase according to the second control signal, and outputs a third high-frequency signal having a third phase (x phase). )When,
A combiner (18) for combining the first high-frequency signal from the first combiner and the third high-frequency signal phase-shifted by the second phase shifter and outputting a differential signal;
Based on the difference signal from the combiner, the phase difference between the first phase (a phase) and the third phase (x phase) becomes the second phase (A phase) of the second high-frequency signal. And a controller (10) for determining and supplying the first control signal supplied to the first phase shifter and the second control signal supplied to the second phase shifter. This is a featured phase control device.

本発明に係る位相制御装置は、ＲＦ処理部の前段だけに移相器を設けてＲＦ処理部から出力される高周波信号の位相を決定するのではない。ＲＦ処理部の後段においても移相器を設けて、ＲＦ処理部から出力される高周波信号の位相を後段の移相器により移相し制御部へフィードバックさせることで、実際にＲＦ処理部で処理され出力される高周波信号の位相の変動を前段の移相器に対して反映させることができる。これにより、ＲＦ処理部から出力される高周波信号に所望の位相を確実に設定することができる。 The phase control device according to the present invention does not determine the phase of the high-frequency signal output from the RF processing unit by providing a phase shifter only in the preceding stage of the RF processing unit. A phase shifter is also provided in the subsequent stage of the RF processing unit, and the phase of the high-frequency signal output from the RF processing unit is phase-shifted by the subsequent phase shifter and fed back to the control unit, so that the actual processing is performed in the RF processing unit. Thus, the phase variation of the output high frequency signal can be reflected in the preceding phase shifter. Thereby, a desired phase can be reliably set to the high frequency signal output from the RF processing unit.

本発明の一実施形態に係る位相制御装置の構成の一例を示すブロック図。The block diagram which shows an example of a structure of the phase control apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る位相制御装置の他の構成を示すブロック図。The block diagram which shows the other structure of the phase control apparatus which concerns on one Embodiment of this invention. 本発明の特徴を有していない位相制御の一例を説明する説明図。Explanatory drawing explaining an example of the phase control which does not have the characteristic of this invention. 本発明の特徴を有していない位相制御の他の一例を説明する説明図。Explanatory drawing explaining another example of the phase control which does not have the characteristic of this invention. 本発明の一実施形態に係る位相制御装置を基地局に適用させた場合の一例を示すブロック図。The block diagram which shows an example at the time of applying the phase control apparatus which concerns on one Embodiment of this invention to a base station. 本発明の一実施形態に係る位相制御装置を基地局に適用させた場合の他の一例を示すブロック図。The block diagram which shows another example at the time of applying the phase control apparatus which concerns on one Embodiment of this invention to a base station.

以下、この発明の実施の形態について図面を参照して詳細に説明する。
初めに、本発明の一実施形態に係る位相制御装置１の構成を図１を用いて説明する。位相制御装置１は、高周波信号が入力される入力端１１と、入力端１１に接続される方向性結合器１３と、方向性結合器１３の後段に設けられる移相器１５と、移相器１５の後段に設けられる例えば高周波増幅器、無線装置、中継器、フィルタ等のＲＦ（Radio Frequency）処理部５と、ＲＦ処理部５の後段に設けられる方向性結合器１４と、方向性結合器１４の後段に設けられる出力端１２を有している。ここで、入力端１１と方向性結合器１３、および方向性結合器１４と出力端１２の間は、可能な限り短くすることで、位相のバラツキ、変動が無視できるほど小さく、位相量が固定できるものとする。また方向性結合器１３、１４および合成器１８は、位相管理されたハイブリッドカプラとする。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the configuration of a phase control device 1 according to an embodiment of the present invention will be described with reference to FIG. The phase control device 1 includes an input end 11 to which a high-frequency signal is input, a directional coupler 13 connected to the input end 11, a phase shifter 15 provided at a subsequent stage of the directional coupler 13, and a phase shifter For example, an RF (Radio Frequency) processing unit 5 such as a high-frequency amplifier, a radio device, a repeater, or a filter provided in a subsequent stage, a directional coupler 14 provided in a subsequent stage of the RF processing unit 5, and a directional coupler 14 It has an output end 12 provided in the subsequent stage. Here, the distance between the input end 11 and the directional coupler 13 and between the directional coupler 14 and the output end 12 is made as short as possible, so that variations and fluctuations in phase are negligible and the phase amount is fixed. It shall be possible. The directional couplers 13 and 14 and the combiner 18 are phase-controlled hybrid couplers.

さらに、位相制御装置１は、方向性結合器１４の主線路からの分岐には利得設定用の可変減衰器１６と、可変減衰器１６の後段に設けられる移相器１７と、移相器１７の後段および方向性結合器１３に設けられる合成器１８が設けられる。さらに、合成器１８の後段に設けられる検波器１９と、検波器１９からの出力を受けて、移相器１５、可変減衰器１６、移相器１７へ制御信号を供給する制御部２０を有している。 Further, the phase control apparatus 1 includes a variable attenuator 16 for gain setting at a branch from the main line of the directional coupler 14, a phase shifter 17 provided at the subsequent stage of the variable attenuator 16, and a phase shifter 17. A synthesizer 18 provided in the latter stage and the directional coupler 13 is provided. Further, a detector 19 provided at the subsequent stage of the synthesizer 18 and a control unit 20 that receives the output from the detector 19 and supplies a control signal to the phase shifter 15, the variable attenuator 16, and the phase shifter 17 are provided. is doing.

このような構成をもつ位相制御装置１は、次のように、高周波信号の位相制御を行なう。すなわち、高周波信号の入力位相０ｄｅｇに対し、位相制御装置１から出力される高周波信号の位相をＡｄｅｇに設定することを考える。予め測定器により入力端１１と出力端１２の位相差がＡｄｅｇの時の、方向性結合器１３で分岐された信号の位相をａｄｅｇ、その信号が合成器１８に入力されるときの位相をａ＋ｂｄｅｇとして求めておき（または特定の関数によりその都度演算して出力する）、この値は制御部２０の記憶領域等に格納しておく。また、同様に、測定器により、方向性結合器１４で分岐された信号の位相をｘｄｅｇ、その信号が合成器１８に入力されるときの位相をｘ＋ｙｄｅｇとし、この値は制御部２０の記憶領域等に格納しておく。 The phase control device 1 having such a configuration performs phase control of a high-frequency signal as follows. That is, consider setting the phase of the high-frequency signal output from the phase control device 1 to Adeg with respect to the input phase 0 deg of the high-frequency signal. When the phase difference between the input end 11 and the output end 12 is Adeg by a measuring instrument in advance, the phase of the signal branched by the directional coupler 13 is adeg, and the phase when the signal is input to the combiner 18 is a + b It is obtained as deg (or calculated and output each time using a specific function), and this value is stored in a storage area of the control unit 20 or the like. Similarly, the phase of the signal branched by the directional coupler 14 by the measuring device is x deg and the phase when the signal is input to the synthesizer 18 is x + ydeg, and this value is stored in the control unit 20. Stored in an area or the like.

このとき、制御部２０は、予め測定器により求めておき記憶領域に格納していた値として（または特定の関数によりその都度演算して出力する値として）、合成器１８の入力位相が、｜（ａ＋ｂ）−（ｘ＋ｙ）｜＝１８０ｄｅｇ、すなわち２信号の位相が反転するように移相器１７に制御信号を設定する。これはｙｄｅｇの位相量を制御していることになる。 At this time, the control unit 20 determines the input phase of the synthesizer 18 as a value previously obtained by a measuring instrument and stored in the storage area (or as a value that is calculated and output each time using a specific function). (A + b) − (x + y) | = 180 deg, that is, a control signal is set in the phase shifter 17 so that the phases of the two signals are inverted. This controls the phase amount of ydeg.

逆位相で合成器１８に入力された２信号は互いに打ち消しあい、その結果、検波器１９に入力される電力は最小となる。このとき合成器１８に入力される２信号の電力差が大きいと、２信号の位相差分による電力の変化が見えづらくなるため、可変減衰器１６で２信号の電力差を抑えておく。 The two signals input to the synthesizer 18 in opposite phases cancel each other, and as a result, the power input to the detector 19 is minimized. At this time, if the power difference between the two signals input to the synthesizer 18 is large, it is difficult to see the change in power due to the phase difference between the two signals, so the variable attenuator 16 suppresses the power difference between the two signals.

入力端１１と出力端１２の位相差がＡ＋αｄｅｇにずれた場合、合成器１８に入力される２信号にもαｄｅｇの位相差が発生し、検波器１９に入力される電力が増加する。制御部２０は、予め測定器等により求めて記憶領域に格納したデータ等に基づいて（または特定の関数によりその都度演算して出力する値として）、検波器１９の入力が最小となるような制御信号を移相器１５に供給する。すなわちＡ＋αｄｅｇの通過位相に対し、移相器１５によって−αｄｅｇ分位相を戻すことになる。 When the phase difference between the input end 11 and the output end 12 is shifted to A + αdeg, a phase difference of αdeg is also generated in the two signals input to the combiner 18, and the power input to the detector 19 increases. Based on data or the like previously obtained by a measuring instrument or the like and stored in a storage area (or as a value to be calculated and output each time by a specific function), the control unit 20 minimizes the input of the detector 19. A control signal is supplied to the phase shifter 15. That is, the phase shifter 15 returns the phase by −αdeg to the passing phase of A + αdeg.

ここで、可変減衰器１６、移相器１７は、制御部２０から制御される電子可変のものでも、別の回路による制御であっても、手動設定であっても同様の考えにより高周波信号の位相Ａを設定することができる。また移相器１５を含め、予想される環境変化（温度、経年、入力レベル）等における変動量を既知のパラメータとし、個々の回路に制御を行うことも可能である。 Here, the variable attenuator 16 and the phase shifter 17 may be electronic variable controlled by the control unit 20, controlled by another circuit, or manually set based on the same idea. Phase A can be set. In addition, it is possible to control individual circuits including a phase shifter 15 by using a variation amount in an expected environmental change (temperature, aging, input level) or the like as a known parameter.

また合成器１８における合成（打ち消し）は、合成器１８の出力の増減で判断するため、可変減衰器１６、移相器１７は、方向性結合器１３の系にあってもかまわない。
さらに２信号の電力を一致させるには、方向性結合器１３と合成器１８の合計損失と、方向性結合器１４と可変減衰器１６と合成器１８の合計損失が一致すればよいため、方向性結合器１３、１４、合成器１８の結合量により様々な組み合わせが可能であり、場合によっては可変減衰器１６を省略することも可能である。 Further, since synthesis (cancellation) in the synthesizer 18 is determined by increase / decrease in the output of the synthesizer 18, the variable attenuator 16 and the phase shifter 17 may be in the system of the directional coupler 13.
Further, in order to match the powers of the two signals, the total loss of the directional coupler 13 and the combiner 18 and the total loss of the directional coupler 14, the variable attenuator 16, and the combiner 18 need only match. Various combinations are possible depending on the coupling amounts of the sex couplers 13 and 14 and the synthesizer 18, and the variable attenuator 16 may be omitted in some cases.

また、他の実施形態として、図２に示すように、移相器１５の後段に減衰器４１をさらに設けることで、入出力間の利得を安定させることも可能である。
（本発明の特徴を有さない位相制御装置との対比による考察）
次に、本発明の特徴を有さない位相制御装置との対比により本発明の一実施形態である位相制御装置の動作上の考察を行なう。 As another embodiment, as shown in FIG. 2, it is also possible to stabilize the gain between input and output by further providing an attenuator 41 after the phase shifter 15.
(Consideration by comparison with phase control device having no features of the present invention)
Next, the operation of the phase control apparatus according to an embodiment of the present invention will be considered by comparison with a phase control apparatus having no features of the present invention.

すなわち、図３に示した位相制御装置は、高周波信号の位相をＲＦ処理部の入力段の手前に設けた移相器および制御部により、設定するものである。ここで、制御部は、環境温度変化等に対し予め温度変化に対する位相変動量を規定しておき、移相器を制御部により例えば、温度Ｈに対してｘｄｅｇ、温度Ｍに対してｙｄｅｇ、温度Ｌに対してｚｄｅｇのように設定する。この方式では、構成が単純で、増幅器等を２合成する場合等は十分な性能を持つが、一方、何らかの原因（たとえばプリント基板の吸湿）により出力される高周波信号の位相に変動が生じたとしても、外部からは分からず、所望の位相であるＡｄｅｇが保障されているとは言いがたい。 That is, the phase control device shown in FIG. 3 sets the phase of the high-frequency signal by the phase shifter and control unit provided before the input stage of the RF processing unit. Here, the control unit preliminarily defines the phase fluctuation amount with respect to the temperature change with respect to the environmental temperature change or the like, and the phase shifter is controlled by the control unit, for example, xdeg for the temperature H, ydeg for the temperature M, L is set like zdeg. This system is simple in structure and has sufficient performance when combining two amplifiers, etc. On the other hand, it is assumed that the phase of the high-frequency signal output due to some cause (for example, moisture absorption of the printed circuit board) has occurred. However, it is not known from the outside, and it is difficult to say that the desired phase, Adeg, is guaranteed.

これに対し、上述した本発明の一実施形態に係る図１および図２の位相制御装置においては、少なくとも、ＲＦ処理部５の出力段の高周波信号の位相を反映した移相器１７の出力と合成器１８により方向性結合器１３の出力との差分が求められ、位相Ａ≒ｘ−ａおよび｜（ａ＋ｂ）−（ｘ＋ｙ）｜＝１８０ｄｅｇが実現するような制御信号が制御部２０から移相器１５、可変減衰器１６、移相器１７に供給されるため、たとえばプリント基板の吸湿等による高周波信号の位相の変動に対しても、ＲＦ処理部から出力される高周波信号に所望の位相Ａを確実に設定することができる。 On the other hand, in the phase control apparatus of FIG. 1 and FIG. 2 according to the embodiment of the present invention described above, at least the output of the phase shifter 17 reflecting the phase of the high-frequency signal at the output stage of the RF processing unit 5. The synthesizer 18 obtains a difference from the output of the directional coupler 13, and a control signal for realizing the phase A≈x−a and | (a + b) − (x + y) | = 180 deg is transferred from the control unit 20. Is supplied to the device 15, the variable attenuator 16, and the phase shifter 17. For example, a desired phase A can be added to the high-frequency signal output from the RF processing unit even when the phase of the high-frequency signal is changed due to moisture absorption of the printed circuit board. Can be set reliably.

またさらに、図４に示した位相制御装置においては、基地局から分離して供給される高周波信号をそれぞれ移相器に供給し、後段のＲＦ処理部に供給する構造において、ＲＦ処理部の後段に設けられる結合器および検出器の出力が制御部に供給され、制御部は、これに応じた制御信号を各移相器に供給することができる。 Furthermore, in the phase control device shown in FIG. 4, in the structure in which the high-frequency signal supplied separately from the base station is supplied to the phase shifter and supplied to the subsequent RF processing unit, the subsequent stage of the RF processing unit The outputs of the couplers and detectors provided in are supplied to the control unit, and the control unit can supply a control signal corresponding to the outputs to each phase shifter.

しかしながら、この構成による位相制御装置においても、ＲＦ処理部の出力である高周波信号の利得の大きさや、装置間の位相差は補正できたとしても、本発明に係る位相制御装置のように、前段と後段の位相同士を比較しているわけではないので、出力である高周波信号の絶対位相の変動を検出したり、これを制御することはできない。 However, even in the phase control device with this configuration, even if the magnitude of the gain of the high-frequency signal that is the output of the RF processing unit and the phase difference between the devices can be corrected, as in the phase control device according to the present invention, And the subsequent phase are not compared with each other, and therefore, it is impossible to detect or control the fluctuation of the absolute phase of the high-frequency signal as the output.

従って、上述した本発明の一実施形態に係る図１および図２の位相制御装置のように、たとえばプリント基板の吸湿等による高周波信号の位相の変動に対しても、ＲＦ処理部のから出力される高周波信号の位相の変動を制御して確実に任意の位相の高周波信号を出力するということはできない。 Therefore, as in the phase control device of FIGS. 1 and 2 according to the embodiment of the present invention described above, the RF processing unit outputs the fluctuation of the phase of the high frequency signal due to moisture absorption of the printed circuit board, for example. It is impossible to reliably output a high-frequency signal having an arbitrary phase by controlling the fluctuation of the phase of the high-frequency signal.

（基地局に適用した場合の実施形態）
次に、上述した本発明の一実施形態の位相制御装置を基地局に適用した場合の実施形態を図面を用いて詳細に説明する。図５および図６は、本発明の一実施形態に係る位相制御装置を基地局に適用させた場合の一例を示すブロック図である。本発明の一実施形態の位相制御装置は、例えば、基地局２からの高周波信号をアンテナ４から出力する際のパワー調整において、例えば、２０ＫＷの高周波増幅器を何台使用するかというシステムに対し、複数の高周波増幅器４２からの複数の高周波信号の位相Ａをそれぞれ確実に設定することで出力の低下を回避するものである。すなわち、複数の高周波増幅器４２からの複数の高周波信号の位相Ａが完全に一致していなければ、実質的な出力の低下を招くこととなる。 (Embodiment when applied to a base station)
Next, an embodiment in which the above-described phase control apparatus according to an embodiment of the present invention is applied to a base station will be described in detail with reference to the drawings. 5 and 6 are block diagrams illustrating an example in which the phase control apparatus according to one embodiment of the present invention is applied to a base station. The phase control apparatus according to an embodiment of the present invention is, for example, a system that uses, for example, 20 KW high-frequency amplifiers in power adjustment when a high-frequency signal from the base station 2 is output from the antenna 4. A decrease in output is avoided by reliably setting the phases A of the plurality of high-frequency signals from the plurality of high-frequency amplifiers 42, respectively. That is, if the phases A of the plurality of high-frequency signals from the plurality of high-frequency amplifiers 42 do not completely match, the output will be substantially reduced.

ここで、図５に示される位相制御装置１’においては、基地局２にそれぞれ接続される入力端１１，３１と、出力端１２，３２と、出力端１２，３２がそれぞれ接続される方向性結合器３と、方向性結合器３に接続されるアンテナ４が設けられる。
さらに、位相制御装置１’は、入力端１１に接続される方向性結合器１３と、方向性結合器１３の後段に設けられる移相器１５と、移相器１５の後段に設けられる例えば２０ＫＷの高周波増幅器４２と、高周波増幅器４２の後段に設けられる方向性結合器１４と、方向性結合器１４の後段に設けられる出力端１２を有している。さらに、位相制御装置１’は、方向性結合器１４の主線路からの分岐には利得設定用の可変減衰器１６と、可変減衰器１６の後段に設けられる移相器１７と、移相器１７の後段および方向性結合器１３に設けられる合成器１８が設けられる。さらに、合成器１８の後段に設けられる検波器１９と、検波器１９からの出力を受けて、移相器１５、可変減衰器１６、移相器１７へ制御信号を供給する制御部２０を有している。 Here, in the phase control device 1 ′ shown in FIG. 5, the input terminals 11, 31 connected to the base station 2, the output terminals 12, 32, and the directivity in which the output terminals 12, 32 are connected respectively. A coupler 3 and an antenna 4 connected to the directional coupler 3 are provided.
Further, the phase control device 1 ′ includes a directional coupler 13 connected to the input end 11, a phase shifter 15 provided at the subsequent stage of the directional coupler 13, and, for example, 20 kW provided at the subsequent stage of the phase shifter 15. High-frequency amplifier 42, directional coupler 14 provided at the subsequent stage of high-frequency amplifier 42, and output terminal 12 provided at the subsequent stage of directional coupler 14. Further, the phase control device 1 ′ includes a variable attenuator 16 for gain setting at a branch from the main line of the directional coupler 14, a phase shifter 17 provided at the subsequent stage of the variable attenuator 16, and a phase shifter. 17 and a synthesizer 18 provided in the directional coupler 13 are provided. Further, a detector 19 provided at the subsequent stage of the synthesizer 18 and a control unit 20 that receives the output from the detector 19 and supplies a control signal to the phase shifter 15, the variable attenuator 16, and the phase shifter 17 are provided. is doing.

さらに、位相制御装置１’は、入力端３１に接続される方向性結合器３３と、方向性結合器３３の後段に設けられる移相器３５と、移相器３５の後段に設けられる例えば２０ＫＷの高周波増幅器４３と、高周波増幅器４３の後段に設けられる方向性結合器３４と、方向性結合器３４の後段に設けられる出力端３２を有している。さらに、位相制御装置１’は、方向性結合器３４の主線路からの分岐には利得設定用の可変減衰器３６と、可変減衰器３６の後段に設けられる移相器３７と、移相器３７の後段および方向性結合器３３に設けられる合成器３８が設けられる。さらに、合成器３８の後段に設けられる検波器３９と、検波器３９からの出力を受けて、移相器３５、可変減衰器３６、移相器３７へ制御信号を供給する制御部２０が共通して設けられている。なお、この制御部２０は、高周波増幅器４３に専用のものであっても良い。 Further, the phase control device 1 ′ includes a directional coupler 33 connected to the input end 31, a phase shifter 35 provided at the subsequent stage of the directional coupler 33, and, for example, 20 kW provided at the subsequent stage of the phase shifter 35. High-frequency amplifier 43, directional coupler 34 provided at the subsequent stage of high-frequency amplifier 43, and output terminal 32 provided at the subsequent stage of directional coupler 34. Further, the phase control device 1 ′ includes a variable attenuator 36 for gain setting at a branch from the main line of the directional coupler 34, a phase shifter 37 provided at the subsequent stage of the variable attenuator 36, and a phase shifter. A synthesizer 38 provided in the rear stage of 37 and the directional coupler 33 is provided. Further, the detector 39 provided in the subsequent stage of the combiner 38 and the control unit 20 that receives the output from the detector 39 and supplies a control signal to the phase shifter 35, the variable attenuator 36, and the phase shifter 37 are common. Is provided. The control unit 20 may be dedicated to the high frequency amplifier 43.

このような構成をもつ基地局に適用された位相制御装置１’によれば、２またはそれ以上の台数の高周波増幅器に対して使用することが可能であり、発射する電波の強度に応じて同一の位相の高周波信号を複数台の高周波増幅器により増幅させ、方向性結合器３で合成することで、位相のずれによって出力が減衰することがない任意の強度をもった高周波信号を出力させることができる。
また、図６に示すように、さらに、移相器１５および移相器３５の後段に減衰器４１、４４をそれぞれ設けることで、さらに、入出力間の利得を安定させることも可能である。 According to the phase control device 1 ′ applied to the base station having such a configuration, it can be used for two or more high-frequency amplifiers, and is the same according to the intensity of the emitted radio wave. A high-frequency signal having an arbitrary intensity with which the output is not attenuated due to a phase shift can be output by amplifying the high-frequency signal of the phase with a plurality of high-frequency amplifiers and synthesizing the high-frequency signal with the directional coupler 3. it can.
Further, as shown in FIG. 6, by further providing attenuators 41 and 44 at the subsequent stage of the phase shifter 15 and the phase shifter 35, it is possible to further stabilize the gain between input and output.

以上記載した様々な実施形態は複数同時に実施することが可能であり、これらの記載により、当業者は本発明を実現することができるが、更にこれらの実施形態の様々な変形例を思いつくことが当業者によって容易であり、発明的な能力をもたなくとも様々な実施形態へと適用することが可能である。従って、本発明は、開示された原理と新規な特徴に矛盾しない広範な範囲に及ぶものであり、上述した実施形態に限定されるものではない。 A plurality of the various embodiments described above can be implemented at the same time. With these descriptions, those skilled in the art can realize the present invention, but various modifications of these embodiments can be conceived. It is easy for a person skilled in the art and can be applied to various embodiments without inventive ability. Therefore, the present invention covers a wide range consistent with the disclosed principle and novel features, and is not limited to the above-described embodiments.

１…位相制御装置、２…基地局、３…方向性結合器、４…アンテナ、５…ＲＦ処理部、６…ＲＦ処理部、１１…入力端、１２…出力端、１３…方向性結合器、１４…方向性結合器、１５…移相器、１６…可変減衰器、１７…移相器、１８…合成器、１９…検波器、２０…制御部、３１…入力端、３２…出力端、３３…方向性結合器、３４…方向性結合器、３５…移相器、３６…可変減衰器、３７…移相器、３８…合成器。 DESCRIPTION OF SYMBOLS 1 ... Phase control apparatus, 2 ... Base station, 3 ... Directional coupler, 4 ... Antenna, 5 ... RF processing part, 6 ... RF processing part, 11 ... Input end, 12 ... Output end, 13 ... Directional coupler , 14 ... Directional coupler, 15 ... Phase shifter, 16 ... Variable attenuator, 17 ... Phase shifter, 18 ... Synthesizer, 19 ... Detector, 20 ... Control unit, 31 ... Input end, 32 ... Output end 33 ... Directional coupler, 34 ... Directional coupler, 35 ... Phase shifter, 36 ... Variable attenuator, 37 ... Phase shifter, 38 ... Synthesizer.

Claims

A first coupler for receiving a first high-frequency signal having a first phase and bifurcating the first high-frequency signal;
A first phase shifter that receives the first high-frequency signal supplied from the first coupler, shifts the phase according to a first control signal, and outputs the phase-shifted signal;
An RF processing unit that performs RF processing on the first high-frequency signal phase-shifted by the first phase shifter;
A second coupler for receiving a second high-frequency signal having a second phase that has been subjected to RF processing in the RF processing section, and branching and outputting the second high-frequency signal;
A second phase shifter that receives the second high-frequency signal supplied from the second coupler, and outputs a third high-frequency signal having a third phase by phase-shifting according to a second control signal;
A combiner that combines the first high-frequency signal from the first combiner and the third high-frequency signal phase-shifted by the second phase shifter to output a differential signal;
Based on the difference signal from the synthesizer, the phase difference between the first phase and the third phase is supplied to the first phase shifter so as to be the second phase of the second high-frequency signal. A controller that determines and supplies the first control signal and the second control signal to be supplied to the second phase shifter;
A phase control apparatus comprising: