WO2014132337A1 - Power amplifier and impedance tuner - Google Patents

Power amplifier and impedance tuner Download PDF

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Publication number
WO2014132337A1
WO2014132337A1 PCT/JP2013/054945 JP2013054945W WO2014132337A1 WO 2014132337 A1 WO2014132337 A1 WO 2014132337A1 JP 2013054945 W JP2013054945 W JP 2013054945W WO 2014132337 A1 WO2014132337 A1 WO 2014132337A1
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Prior art keywords
signal
set value
variable
amplitude
power amplifier
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PCT/JP2013/054945
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French (fr)
Japanese (ja)
Inventor
堀口　健一
俊英 岡
英俊 牧村
西本　研悟
森　一富
大島　毅
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三菱電機株式会社
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Priority to PCT/JP2013/054945 priority Critical patent/WO2014132337A1/en
Priority to TW102112028A priority patent/TW201434272A/en
Publication of WO2014132337A1 publication Critical patent/WO2014132337A1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers

Definitions

  • the present invention relates to an impedance tuner that detects an impedance seen from an antenna side from a power amplifier and adjusts the impedance so as to improve the characteristics of the power amplifier, and a power amplification device including the impedance tuner. .
  • the impedance of the antenna of the wireless terminal changes depending on the positional relationship between the terminal and the human body or conductor (the impedance viewed from the antenna side from the power amplifier built in the wireless terminal changes). To do).
  • the impedance of the antenna changes, the characteristics of the wireless terminal (for example, efficiency, distortion characteristics, etc.) fluctuate. Therefore, the impedance viewed from the power amplifier is detected from the power amplifier, and the power amplifier and antenna are detected according to the detection result.
  • a technique for controlling a variable matching circuit inserted between the two is disclosed.
  • FIG. 5 is a configuration diagram showing a power amplifying device disclosed in Patent Document 1 below.
  • the power amplifier 102 amplifies the transmission signal input from the RF input terminal 101, and the transmission signal amplified by the power amplifier 102 is radiated from the antenna 106 to the space.
  • the directional coupler 103 extracts a part of the transmission signal amplified by the power amplifier 102 and outputs the extracted signal to the frequency conversion circuit 107, and also reflects the transmission signal reflected by the antenna 106 and returned. Is extracted and output to the frequency conversion circuit 108.
  • the frequency conversion circuit 107 includes a local oscillator, an A / D converter, and the like, and a signal (part of a transmission signal) extracted by the directional coupler 103 using a local oscillation signal oscillated from the local oscillator. ) Is converted into a baseband frequency, and the A / D converter is used to convert a transmission baseband signal, which is a signal after frequency conversion, into a digital signal, which is transmitted to the amplitude comparison circuit 109 and the phase comparison circuit 110. Output.
  • the frequency conversion circuit 108 includes a local oscillator, an A / D converter, and the like.
  • a signal (part of the reflected signal) extracted by the directional coupler 103 using a local oscillation signal oscillated from the local oscillator is used.
  • Is converted into a baseband frequency and the A / D converter is used to convert the reflected baseband signal, which is a signal after frequency conversion, into a digital signal, which is transmitted to the amplitude comparison circuit 109 and the phase comparison circuit 110.
  • An amplitude comparison circuit 109 which is a digital circuit, detects an amplitude difference between the transmission baseband signal output from the frequency conversion circuit 107 and the reflected baseband signal output from the frequency conversion circuit 108, and sends the amplitude difference to the control circuit 111. Output.
  • the phase comparison circuit 110 that is a digital circuit detects the phase difference between the transmission baseband signal output from the frequency conversion circuit 107 and the reflection baseband signal output from the frequency conversion circuit 108, and sends the phase difference to the control circuit 111. Output.
  • the control circuit 111 which is a digital circuit, controls the variable matching circuit 104 based on the amplitude difference output from the amplitude comparison circuit 109 and the phase difference output from the phase comparison circuit 110, so that the power amplifier 102 is connected to the antenna 106 side. Adjust the impedance to see.
  • the conventional power amplifying apparatus is configured as described above, in addition to the frequency conversion circuits 107 and 108, the amplitude comparison circuit 109, the phase comparison circuit 110, and the control circuit 111 which are digital circuits are mounted.
  • the frequency conversion circuits 107 and 108 are large analog circuits including a local oscillator, an A / D converter, and the like, and the amplitude comparison circuit 109, the phase comparison circuit 110, and the control circuit 111 are digital circuits. . For this reason, there existed a subject which the circuit of the whole apparatus enlarged.
  • the present invention has been made to solve the above-described problems, and eliminates the need for mounting a large analog circuit or digital circuit, thereby reducing the size of the entire device, and a power amplifier and impedance tuner.
  • the purpose is to obtain.
  • a power amplification device includes a power amplifier that amplifies a transmission signal, an antenna that radiates a transmission signal amplified by the power amplifier to space, an impedance matching circuit that is inserted between the power amplifier and the antenna, A signal detection means for detecting the transmission signal amplified by the amplifier and detecting the reflection signal of the transmission signal reflected and returned by the antenna, and the amplitude and phase of the transmission signal or the reflection signal detected by the signal detection means And adjusting the impedance of the impedance matching circuit if the amplitude of the synthesized signal by the signal synthesizing unit is equal to or less than a predetermined value. Or the impedance matching circuit impedance and power amplifier bias conditions are controlled A.
  • the impedance matching circuit inserted between the power amplifier and the antenna and the transmission signal amplified by the power amplifier are detected, and the reflection signal of the transmission signal reflected and returned by the antenna is detected.
  • a signal synthesis unit for synthesizing the transmission signal and the reflection signal after adjusting the amplitude and phase of the transmission signal or the reflection signal detected by the signal detection unit.
  • the impedance of the impedance matching circuit is controlled or the impedance of the impedance matching circuit and the bias condition of the power amplifier are controlled if the amplitude of the synthesized signal by the means is less than a predetermined value, a large analog circuit or digital Impedance looking at the antenna side from the power amplifier without mounting a circuit It can now be adjusted, as a result, there is an effect that it is possible to reduce the size of the circuit of the entire device.
  • FIG. 1 is a configuration diagram illustrating a power amplifying device disclosed in Patent Document 1.
  • FIG. 1 is a configuration diagram illustrating a power amplifying device disclosed in Patent Document 1.
  • FIG. 1 is a block diagram showing a power amplifying apparatus according to Embodiment 1 of the present invention.
  • an RF input terminal 1 is a terminal for inputting an RF signal which is a transmission signal.
  • the power amplifier 2 amplifies the RF signal input from the RF input terminal 1 and performs a process of outputting the amplified RF signal to the impedance tuner 3. All components of the impedance tuner 3 are configured by analog circuits.
  • the impedance tuner 3 detects the impedance of the power amplifier 2 viewed from the antenna 5 side, and adjusts the impedance so that the characteristics of the power amplifier 2 are improved. Perform the process.
  • the RF output terminal 4 is a terminal that outputs an RF signal that is an output signal of the impedance tuner 3.
  • the antenna 5 is connected to the RF output terminal 4 and is a member that radiates an RF signal output from the RF output terminal 4 into space.
  • the directional coupler 11 of the impedance tuner 3 extracts a part of the RF signal amplified by the power amplifier 2 and outputs it to the variable attenuator 12 and also reflects the reflected signal of the RF signal reflected by the antenna 5 and returning. Are extracted and output to the synthesizer 14.
  • FIG. 1 shows an example in which a part of the RF signal amplified by the power amplifier 2 is output to the variable attenuator 12 and a part of the reflected signal is output to the combiner 14. A part of the RF signal may be output to the synthesizer 14 and a part of the reflected signal may be output to the variable attenuator 12.
  • the directional coupler 11 constitutes signal detection means.
  • the variable attenuator 12 is an analog circuit that adjusts the amplitude of the RF signal (part of the RF signal amplified by the power amplifier 2) output from the directional coupler 11 according to a set value.
  • the variable phase shifter 13 is an analog circuit that adjusts the phase of the RF signal whose amplitude is adjusted by the variable attenuator 12 according to a set value.
  • FIG. 1 shows an example in which the variable attenuator 12 is arranged before the variable phase shifter 13, the variable attenuator 12 may be arranged after the variable phase shifter 13.
  • the synthesizer 14 includes an RF signal whose amplitude and phase are adjusted by the variable attenuator 12 and the variable phase shifter 13, and a reflected signal output from the directional coupler 11 (a reflected signal that is reflected by the antenna 5 and returned). And an analog circuit that outputs the combined signal to the detector 15.
  • the variable attenuator 12, the variable phase shifter 13, and the synthesizer 14 constitute a signal synthesizer.
  • the detector 15 is an analog circuit that detects the amplitude of the combined signal output from the combiner 14.
  • the control circuit 16 controls the impedance of the variable matching circuit 17 or the impedance of the variable matching circuit 17 and the power amplifier if the amplitude of the combined signal detected by the detector 15 is not more than a preset threshold value (predetermined value). 2 is an analog circuit for controlling the second bias condition. Further, if the amplitude of the combined signal detected by the detector 15 is equal to or less than the threshold value, the control circuit 16 performs a process of switching the set values of the variable attenuator 12 and the variable phase shifter 13.
  • the variable matching circuit 17 is inserted between the directional coupler 11 and the antenna 5 and is an analog circuit whose impedance is adjusted under the control of the control circuit 16.
  • the variable matching circuit 17 constitutes an impedance matching circuit.
  • the power amplifier 2 When an RF signal as a transmission signal is input from the RF input terminal 1, the power amplifier 2 amplifies the RF signal and outputs the amplified RF signal to the impedance tuner 3. The RF signal amplified by the power amplifier 2 passes through the impedance tuner 3 and is then radiated from the antenna 5 to the space.
  • the impedance tuner 3 detects the impedance when the antenna 5 is viewed from the power amplifier 2 and controls the impedance of the variable matching circuit 17 inserted between the power amplifier 2 and the antenna 5 according to the detection result. By doing so, the characteristics (for example, efficiency, distortion characteristics, etc.) of the power amplifier 2 are improved.
  • the processing contents of the impedance tuner 3 will be specifically described below.
  • FIG. 2 is a Smith chart showing an example of load impedance when the antenna 5 is viewed from the power amplifier 2.
  • region A and region B are described.
  • the characteristics of the power amplifier 2 are those in the case where the load impedance is in the center of the Smith chart than in the vicinity of the Smith chart. Will be better.
  • the characteristics of the power amplifier 2 are better when the load impedance is present in the region B than in the region A. In the design stage of the power amplifier 2, it is possible to recognize where the load impedance is and where the characteristics are good.
  • the directional coupler 11 of the impedance tuner 3 extracts a part of the RF signal V S amplified by the power amplifier 2 and outputs a part of the signal k ⁇ V S to the variable attenuator 12.
  • k is a coupling rate of the directional coupler 11.
  • the directional coupler 11 extracts part of the reflected signal V R of the RF signal V S coming back after being reflected by the antenna 5, and outputs a part of the signal k ⁇ V R to the combiner 14 .
  • V R V S ⁇ ⁇ L (1)
  • ⁇ L is a reflection coefficient when the antenna 5 side is viewed from the power amplifier 2.
  • variable attenuator 12 When receiving the RF signal k ⁇ V S from the directional coupler 11, the variable attenuator 12 adjusts the amplitude of the RF signal k ⁇ V S with the current set value ⁇ .
  • Variable phase shifter 13 receives the RF signal k ⁇ ⁇ ⁇ V S after amplitude adjustment by the variable attenuator 12, the reflected signal V R and reverse RF signal after phase adjustment is output from the directional coupler 11 After the phase is reached, the phase of the RF signal k ⁇ ⁇ ⁇ V S is further adjusted with the current set value ⁇ . That is, the variable phase shifter 13 adjusts the phase of the RF signal k ⁇ ⁇ ⁇ V S output from the variable attenuator 12 by the phase shift amount of ( ⁇ + ⁇ ).
  • the synthesizer 14 When the synthesizer 14 receives the RF signal k ⁇ ⁇ ⁇ V S after amplitude / phase adjustment from the variable phase shifter 13, the synthesizer 14 reflects the RF signal k ⁇ ⁇ ⁇ V S and the reflection output from the directional coupler 11. It synthesizes the signal k ⁇ V R, and outputs the combined signal to the detector 15.
  • the detector 15 When receiving the synthesized signal from the synthesizer 14, the detector 15 detects the amplitude
  • of the combined signal detected by the detector 15 is expressed by the following equation (2).
  • the reflection coefficient ⁇ L viewed from the power amplifier 2 toward the antenna 5 approaches the set value ⁇ ⁇ e j ⁇ of the variable attenuator 12 and the variable phase shifter 13, the amplitude of the combined signal
  • FIG. 3 is an explanatory diagram showing an example of the amplitude
  • the set value ⁇ of the variable attenuator 12 is set to ⁇ 1 (first set value)
  • the set value ⁇ of the variable phase shifter 13 is set to ⁇ 1 (first set value).
  • of the combined signal is equal to or less than a preset threshold value, indicating that the load impedance exists in the region A (see FIG. 2). In this state, the characteristics of the power amplifier 2 are not good.
  • the characteristic of the power amplifier 2 is that the impedance of the variable matching circuit 17 is adjusted and the bias condition of the power amplifier 2 is changed without adjusting the setting value ⁇ of the variable attenuator 12 and the setting value ⁇ of the variable phase shifter 13. It can be changed by performing (for example, changing the gate voltage of the power amplifier 2).
  • the control circuit 16 compares the amplitude
  • the characteristics of the power amplifier 2 are not sufficiently improved only by controlling the load impedance (when the load impedance does not reach the desired performance even if the load impedance moves from the area A to the area B), the power amplifier 2
  • the control of the bias conditions may be executed in combination.
  • the set value ⁇ of the variable attenuator 12 is set to ⁇ 1
  • the set value ⁇ of the variable phase shifter 13 is set to ⁇ 1
  • the set value of the variable attenuator 12 is set under the situation where the amplitude
  • the setting value ⁇ 2 that is the second setting value is changed to a value that makes the attenuation amount of the variable attenuator 12 larger than the case of the setting value ⁇ 1 or the output of the variable attenuator 12. Control is performed so as to create a state in which the contribution of the RF signal V S is reduced or eliminated by cutting the path with a switch or the like so that the signal becomes zero.
  • the set value ⁇ of the variable attenuator 12 is returned to ⁇ 1 and the set value ⁇ of the variable phase shifter 13 is returned to ⁇ 1 . Perform such control. Thereby, even after the adjustment of the impedance of the variable matching circuit 17 or the change of the bias condition of the power amplifier 2, the adjustment of the impedance or the change of the bias condition can be continued.
  • variable matching circuit 17 inserted between the directional coupler 11 and the antenna 5 and the RF signal amplified by the power amplifier 2 are detected,
  • a directional coupler 11 that detects a reflected signal of the RF signal reflected and returned by the antenna 5, a variable attenuator 12 that adjusts the amplitude of the RF signal detected by the directional coupler 11, and a variable attenuator 12.
  • a variable phase shifter 13 that adjusts the phase of the RF signal whose amplitude is adjusted by the above, and a combiner 14 that combines the RF signal whose phase is adjusted by the variable phase shifter 13 and the reflected signal.
  • combiner 14 combining signals of an amplitude by
  • the impedance of the power amplifier 2 viewed from the antenna 5 side can be adjusted without mounting a large analog circuit or digital circuit. As a result, the circuit of the entire apparatus can be reduced in size. There is an effect. In addition, when the bias condition of the power amplifier 2 is changed, the efficiency of the power amplifier 2 can be improved and the power consumption can be reduced.
  • the RF signal V S is a traveling wave, without detecting the amplitude difference and phase difference between the reflected signal V R is the reflected wave, the combined signal It is possible to determine whether or not the characteristics of the power amplifier 2 are currently in good condition simply by determining whether or not the amplitude
  • the analog circuit is composed of a circuit smaller than the digital circuit (the amplitude comparison circuit 109, the phase comparison circuit 110, and the control circuit 111 in FIG. 5).
  • the entire circuit can be reduced in size.
  • a large analog circuit such as the frequency conversion circuits 107 and 108 including a local oscillator and an A / D converter is also unnecessary.
  • FIG. 4 is a block diagram showing a power amplifying device according to Embodiment 2 of the present invention.
  • the switch 21 receives frequency information indicating the frequency of the RF signal (transmission signal) input from the RF input terminal 1, and if the frequency is the frequency A, the RF signal V S that is the output signal of the directional coupler 11. Is output to the variable matching circuit 17a.
  • the first changeover switch outputs the RF signal V S that is the output signal of the directional coupler 11 to the variable matching circuit 17b.
  • the variable matching circuit 17 a is an analog circuit that includes the frequency A within an operable frequency range and whose impedance is adjusted under the control of the control circuit 24.
  • the variable matching circuit 17 b is an analog circuit that includes the frequency B within the operable frequency range and whose impedance is adjusted under the control of the control circuit 24.
  • the variable matching circuits 17a and 17b constitute an impedance matching circuit.
  • the duplexer 22 a outputs the output signal of the variable matching circuit 17 a to the switch 23, while executing the process of outputting the reception signal output from the switch 23 to the reception circuit 25.
  • the duplexer 22b performs a process of outputting the output signal of the variable matching circuit 17a to the switch 23 while outputting the reception signal output from the switch 23 to the reception circuit 25.
  • the switch 23 inputs frequency information indicating the frequency of the RF signal input from the RF input terminal 1. If the frequency is frequency A, the output signal of the duplexer 22 a is output to the RF output terminal 4.
  • the second changeover switch outputs the output signal of the duplexer 22b to the RF output terminal 4.
  • the control circuit 24 controls the impedance of the variable matching circuits 17a and 17b or the bias condition of the power amplifier 2 and the impedance of the variable matching circuits 17a and 17b if the amplitude of the combined signal detected by the detector 15 is less than the threshold value. It is an analog circuit that controls Similarly to the control circuit 16 of FIG. 1, the control circuit 24 switches the setting values of the variable attenuator 12 and the variable phase shifter 13 if the amplitude of the combined signal detected by the detector 15 is equal to or less than the threshold value. To implement.
  • the reception circuit 25 performs processing such as demodulating the reception signals output from the duplexers 22a and 22b.
  • the RF signal V S that is the output signal of the directional coupler 11 is output to the variable matching circuit 17 and the output signal of the variable matching circuit 17 is output to the RF output terminal 4.
  • the switch 21 is different in that the output path of the RF signal V S that is the output signal of the directional coupler 11 is appropriately switched.
  • the frequency range in which the variable matching circuit 17 can operate is a certain range, and signals outside the frequency range cannot be handled with a simple circuit configuration. Therefore, in the second embodiment, if the RF signal input from the RF input terminal 1 is the frequency A, the RF signal is output to the variable matching circuit 17a including the frequency A within the operable frequency range. Is a frequency B, it is outputted to the variable matching circuit 17b including the frequency B within the operable frequency range.
  • the switch 21 refers to the frequency information indicating the frequency of the RF signal input from the RF input terminal 1. If the frequency is the frequency A, the switch 21 outputs the RF signal V S that is the output signal of the directional coupler 11. If the frequency B is output to the variable matching circuit 17a, the RF signal V S output from the directional coupler 11 is output to the variable matching circuit 17b. Further, the switch 23 refers to frequency information indicating the frequency of the RF signal input from the RF input terminal 1, and if the frequency is the frequency A, the output signal of the duplexer 22 a is output to the RF output terminal 4. If B, the output signal of the duplexer 22 b is output to the RF output terminal 4.
  • the control circuit 24 is basically the same as the control circuit 16 shown in FIG. 1, and the control circuit 16 controls the impedance of one variable matching circuit 17, whereas the two variable matching circuits 17a, 17a, The difference is that the impedance of 17b is controlled.
  • duplexers 22a and 22b are mounted in order to handle not only the RF signal as a transmission signal but also the reception signal of the antenna 5.
  • the circuit of the entire apparatus can be reduced in size.
  • the efficiency of the power amplifier 2 can be improved and the power consumption can be reduced.
  • the power amplifying device is suitable for a device that needs to improve the characteristics of the power amplifier when the power of the transmission signal is amplified using the power amplifier.

Abstract

The present invention is provided with: a variable matching circuit (17) inserted between a directional coupler (11) and an antenna (5); a variable attenuator (12) for adjusting the amplitude of an RF signal (Vs) detected by the directional coupler (11); a variable phase-shifter (13) for adjusting the phase of the RF signal (Vs) for which the amplitude was adjusted by the variable attenuator (12); and a synthesizer (14) for synthesizing the RF signal (Vs) for which the phase was adjusted by the variable phase-shifter, and a reflection signal (VR). A control circuit (16), when the amplitude (|VDET|) of the synthesized signal from the synthesizer (14) is at or below a threshold, controls the impedance of the variable matching circuit (17) or controls the impedance of the variable matching circuit (17) and the bias conditions of a power amplifier (2).

Description

電力増幅装置及びインピーダンスチューナPower amplifier and impedance tuner
　この発明は、電力増幅器からアンテナ側を見たインピーダンスを検出し、その電力増幅器の特性が改善するように当該インピーダンスを調整するインピーダンスチューナと、そのインピーダンスチューナを備えている電力増幅装置に関するものである。 The present invention relates to an impedance tuner that detects an impedance seen from an antenna side from a power amplifier and adjusts the impedance so as to improve the characteristics of the power amplifier, and a power amplification device including the impedance tuner. .
　例えば、携帯電話などの無線端末では、端末と人体又は導体との位置関係によって、その無線端末のアンテナのインピーダンスが変化する（無線端末に内蔵されている電力増幅器からアンテナ側を見たインピーダンスが変化する）。
　アンテナのインピーダンスが変化すると、無線端末の特性（例えば、効率、歪み特性など）が変動してしまうため、電力増幅器からアンテナ側を見たインピーダンスを検出し、その検出結果にしたがって、電力増幅器とアンテナの間に挿入されている可変整合回路を制御する技術が開示されている。 For example, in a wireless terminal such as a mobile phone, the impedance of the antenna of the wireless terminal changes depending on the positional relationship between the terminal and the human body or conductor (the impedance viewed from the antenna side from the power amplifier built in the wireless terminal changes). To do).
When the impedance of the antenna changes, the characteristics of the wireless terminal (for example, efficiency, distortion characteristics, etc.) fluctuate. Therefore, the impedance viewed from the power amplifier is detected from the power amplifier, and the power amplifier and antenna are detected according to the detection result. A technique for controlling a variable matching circuit inserted between the two is disclosed.
　ここで、図５は以下の特許文献１に開示されている電力増幅装置を示す構成図である。
　この電力増幅装置では、電力増幅器１０２がＲＦ入力端子１０１から入力された送信信号を増幅し、電力増幅器１０２により増幅された送信信号がアンテナ１０６から空間に放射される。
　このとき、方向性結合器１０３は、電力増幅器１０２により増幅された送信信号の一部を抽出して周波数変換回路１０７に出力するとともに、アンテナ１０６により反射されて戻ってくる上記送信信号の反射信号の一部を抽出して周波数変換回路１０８に出力する。 Here, FIG. 5 is a configuration diagram showing a power amplifying device disclosed in Patent Document 1 below.
In this power amplifying apparatus, the power amplifier 102 amplifies the transmission signal input from the RF input terminal 101, and the transmission signal amplified by the power amplifier 102 is radiated from the antenna 106 to the space.
At this time, the directional coupler 103 extracts a part of the transmission signal amplified by the power amplifier 102 and outputs the extracted signal to the frequency conversion circuit 107, and also reflects the transmission signal reflected by the antenna 106 and returned. Is extracted and output to the frequency conversion circuit 108.
　周波数変換回路１０７は、局部発振器やＡ／Ｄ変換器などを備えており、その局部発振器から発振される局部発振信号を用いて、方向性結合器１０３により抽出された信号（送信信号の一部）の周波数をベースバンド周波数に変換するとともに、そのＡ／Ｄ変換器を用いて、周波数変換後の信号である送信ベースバンド信号をディジタル信号に変換して振幅比較回路１０９及び位相比較回路１１０に出力する。
　周波数変換回路１０８は、局部発振器やＡ／Ｄ変換器などを備えており、その局部発振器から発振される局部発振信号を用いて、方向性結合器１０３により抽出された信号（反射信号の一部）の周波数をベースバンド周波数に変換するとともに、そのＡ／Ｄ変換器を用いて、周波数変換後の信号である反射ベースバンド信号をディジタル信号に変換して振幅比較回路１０９及び位相比較回路１１０に出力する。 The frequency conversion circuit 107 includes a local oscillator, an A / D converter, and the like, and a signal (part of a transmission signal) extracted by the directional coupler 103 using a local oscillation signal oscillated from the local oscillator. ) Is converted into a baseband frequency, and the A / D converter is used to convert a transmission baseband signal, which is a signal after frequency conversion, into a digital signal, which is transmitted to the amplitude comparison circuit 109 and the phase comparison circuit 110. Output.
The frequency conversion circuit 108 includes a local oscillator, an A / D converter, and the like. A signal (part of the reflected signal) extracted by the directional coupler 103 using a local oscillation signal oscillated from the local oscillator is used. ) Is converted into a baseband frequency, and the A / D converter is used to convert the reflected baseband signal, which is a signal after frequency conversion, into a digital signal, which is transmitted to the amplitude comparison circuit 109 and the phase comparison circuit 110. Output.
　ディジタル回路である振幅比較回路１０９は、周波数変換回路１０７から出力された送信ベースバンド信号と周波数変換回路１０８から出力された反射ベースバンド信号の振幅差を検出し、その振幅差を制御回路１１１に出力する。
　ディジタル回路である位相比較回路１１０は、周波数変換回路１０７から出力された送信ベースバンド信号と周波数変換回路１０８から出力された反射ベースバンド信号の位相差を検出し、その位相差を制御回路１１１に出力する。
　ディジタル回路である制御回路１１１は、振幅比較回路１０９から出力された振幅差と位相比較回路１１０から出力された位相差に基づいて可変整合回路１０４を制御することで、電力増幅器１０２からアンテナ１０６側を見たインピーダンスを調整する。 An amplitude comparison circuit 109, which is a digital circuit, detects an amplitude difference between the transmission baseband signal output from the frequency conversion circuit 107 and the reflected baseband signal output from the frequency conversion circuit 108, and sends the amplitude difference to the control circuit 111. Output.
The phase comparison circuit 110 that is a digital circuit detects the phase difference between the transmission baseband signal output from the frequency conversion circuit 107 and the reflection baseband signal output from the frequency conversion circuit 108, and sends the phase difference to the control circuit 111. Output.
The control circuit 111, which is a digital circuit, controls the variable matching circuit 104 based on the amplitude difference output from the amplitude comparison circuit 109 and the phase difference output from the phase comparison circuit 110, so that the power amplifier 102 is connected to the antenna 106 side. Adjust the impedance to see.
特開２００７－２８２２３８号公報（段落番号［０００９］、図１）JP 2007-282238 A (paragraph number [0009], FIG. 1)
　従来の電力増幅装置は以上のように構成されているので、周波数変換回路１０７，１０８のほか、ディジタル回路である振幅比較回路１０９、位相比較回路１１０及び制御回路１１１を実装している。しかし、周波数変換回路１０７，１０８は、局部発振器やＡ／Ｄ変換器などを備えている大きなアナログ回路であり、また、振幅比較回路１０９、位相比較回路１１０及び制御回路１１１は、ディジタル回路である。このため、装置全体の回路が大型化してしまう課題があった。 Since the conventional power amplifying apparatus is configured as described above, in addition to the frequency conversion circuits 107 and 108, the amplitude comparison circuit 109, the phase comparison circuit 110, and the control circuit 111 which are digital circuits are mounted. However, the frequency conversion circuits 107 and 108 are large analog circuits including a local oscillator, an A / D converter, and the like, and the amplitude comparison circuit 109, the phase comparison circuit 110, and the control circuit 111 are digital circuits. . For this reason, there existed a subject which the circuit of the whole apparatus enlarged.
　この発明は上記のような課題を解決するためになされたもので、大きなアナログ回路や、ディジタル回路の実装を不要にして、装置全体の回路の小型化を図ることができる電力増幅装置及びインピーダンスチューナを得ることを目的とする。 The present invention has been made to solve the above-described problems, and eliminates the need for mounting a large analog circuit or digital circuit, thereby reducing the size of the entire device, and a power amplifier and impedance tuner. The purpose is to obtain.
　この発明に係る電力増幅装置は、送信信号を増幅する電力増幅器と、電力増幅器により増幅された送信信号を空間に放射するアンテナと、電力増幅器とアンテナの間に挿入されたインピーダンス整合回路と、電力増幅器により増幅された送信信号を検出するとともに、アンテナにより反射されて戻ってくる上記送信信号の反射信号を検出する信号検出手段と、信号検出手段により検出された送信信号又は反射信号の振幅及び位相を調整してから、その送信信号と反射信号を合成する信号合成手段とを設け、制御回路が、信号合成手段による合成信号の振幅が所定値以下であれば、インピーダンス整合回路のインピーダンスを制御、または、インピーダンス整合回路のインピーダンス及び電力増幅器のバイアス条件を制御するようにしたものである。 A power amplification device according to the present invention includes a power amplifier that amplifies a transmission signal, an antenna that radiates a transmission signal amplified by the power amplifier to space, an impedance matching circuit that is inserted between the power amplifier and the antenna, A signal detection means for detecting the transmission signal amplified by the amplifier and detecting the reflection signal of the transmission signal reflected and returned by the antenna, and the amplitude and phase of the transmission signal or the reflection signal detected by the signal detection means And adjusting the impedance of the impedance matching circuit if the amplitude of the synthesized signal by the signal synthesizing unit is equal to or less than a predetermined value. Or the impedance matching circuit impedance and power amplifier bias conditions are controlled A.
　この発明によれば、電力増幅器とアンテナの間に挿入されたインピーダンス整合回路と、電力増幅器により増幅された送信信号を検出するとともに、アンテナにより反射されて戻ってくる上記送信信号の反射信号を検出する信号検出手段と、信号検出手段により検出された送信信号又は反射信号の振幅及び位相を調整してから、その送信信号と反射信号を合成する信号合成手段とを設け、制御回路が、信号合成手段による合成信号の振幅が所定値以下であれば、インピーダンス整合回路のインピーダンスを制御、または、インピーダンス整合回路のインピーダンス及び電力増幅器のバイアス条件を制御するように構成したので、大きなアナログ回路や、ディジタル回路を実装することなく、電力増幅器からアンテナ側を見たインピーダンスを調整することができるようになり、その結果、装置全体の回路の小型化を図ることができる効果がある。 According to the present invention, the impedance matching circuit inserted between the power amplifier and the antenna and the transmission signal amplified by the power amplifier are detected, and the reflection signal of the transmission signal reflected and returned by the antenna is detected. And a signal synthesis unit for synthesizing the transmission signal and the reflection signal after adjusting the amplitude and phase of the transmission signal or the reflection signal detected by the signal detection unit. Since the impedance of the impedance matching circuit is controlled or the impedance of the impedance matching circuit and the bias condition of the power amplifier are controlled if the amplitude of the synthesized signal by the means is less than a predetermined value, a large analog circuit or digital Impedance looking at the antenna side from the power amplifier without mounting a circuit It can now be adjusted, as a result, there is an effect that it is possible to reduce the size of the circuit of the entire device.
この発明の実施の形態１による電力増幅装置を示す構成図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the power amplification apparatus by Embodiment 1 of this invention. 電力増幅器２からアンテナ５側を見た負荷インピーダンスの一例を示すスミスチャートである。4 is a Smith chart showing an example of load impedance when the antenna 5 is viewed from the power amplifier 2; 検波器１５により検波される合成信号の振幅｜ＶＤＥＴ｜の一例を示す説明図である。It is explanatory drawing which shows an example of amplitude | VDET | of the synthetic | combination signal detected by the detector 15. FIG. この発明の実施の形態２による電力増幅装置を示す構成図である。It is a block diagram which shows the power amplification apparatus by Embodiment 2 of this invention. 特許文献１に開示されている電力増幅装置を示す構成図である。1 is a configuration diagram illustrating a power amplifying device disclosed in Patent Document 1. FIG.
　以下、この発明をより詳細に説明するため、この発明を実施するための形態について、添付の図面に従って説明する。
実施の形態１．
　図１はこの発明の実施の形態１による電力増幅装置を示す構成図である。
　図１において、ＲＦ入力端子１は送信信号であるＲＦ信号を入力する端子である。
　電力増幅器２はＲＦ入力端子１から入力されたＲＦ信号を増幅し、増幅後のＲＦ信号をインピーダンスチューナ３に出力する処理を実施する。
　インピーダンスチューナ３は構成要素の全てがアナログ回路で構成されており、電力増幅器２からアンテナ５側を見たインピーダンスを検出して、その電力増幅器２の特性が改善するように当該インピーダンスを調整するなどの処理を実施する。
　ＲＦ出力端子４はインピーダンスチューナ３の出力信号であるＲＦ信号を出力する端子である。
　アンテナ５はＲＦ出力端子４に接続されており、ＲＦ出力端子４から出力されたＲＦ信号を空間に放射する部材である。 Hereinafter, in order to describe the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
1 is a block diagram showing a power amplifying apparatus according to Embodiment 1 of the present invention.
In FIG. 1, an RF input terminal 1 is a terminal for inputting an RF signal which is a transmission signal.
The power amplifier 2 amplifies the RF signal input from the RF input terminal 1 and performs a process of outputting the amplified RF signal to the impedance tuner 3.
All components of the impedance tuner 3 are configured by analog circuits. The impedance tuner 3 detects the impedance of the power amplifier 2 viewed from the antenna 5 side, and adjusts the impedance so that the characteristics of the power amplifier 2 are improved. Perform the process.
The RF output terminal 4 is a terminal that outputs an RF signal that is an output signal of the impedance tuner 3.
The antenna 5 is connected to the RF output terminal 4 and is a member that radiates an RF signal output from the RF output terminal 4 into space.
　インピーダンスチューナ３の方向性結合器１１は電力増幅器２により増幅されたＲＦ信号の一部を抽出して可変減衰器１２に出力するとともに、アンテナ５により反射されて戻ってくる上記ＲＦ信号の反射信号の一部を抽出して合成器１４に出力するアナログ回路である。
　図１では、電力増幅器２により増幅されたＲＦ信号の一部を可変減衰器１２に出力して、反射信号の一部を合成器１４に出力する例を示しているが、電力増幅器２により増幅されたＲＦ信号の一部を合成器１４に出力して、反射信号の一部を可変減衰器１２に出力するようにしてもよい。
　なお、方向性結合器１１は信号検出手段を構成している。 The directional coupler 11 of the impedance tuner 3 extracts a part of the RF signal amplified by the power amplifier 2 and outputs it to the variable attenuator 12 and also reflects the reflected signal of the RF signal reflected by the antenna 5 and returning. Are extracted and output to the synthesizer 14.
FIG. 1 shows an example in which a part of the RF signal amplified by the power amplifier 2 is output to the variable attenuator 12 and a part of the reflected signal is output to the combiner 14. A part of the RF signal may be output to the synthesizer 14 and a part of the reflected signal may be output to the variable attenuator 12.
The directional coupler 11 constitutes signal detection means.
　可変減衰器１２は方向性結合器１１から出力されたＲＦ信号（電力増幅器２により増幅されたＲＦ信号の一部）の振幅を設定値にしたがって調整するアナログ回路である。
　可変移相器１３は可変減衰器１２により振幅が調整されたＲＦ信号の位相を設定値にしたがって調整するアナログ回路である。
　図１では、可変減衰器１２が可変移相器１３の前段に配置されている例を示しているが、可変減衰器１２が可変移相器１３の後段に配置されていてもよい。
　合成器１４は可変減衰器１２及び可変移相器１３によって振幅・位相が調整されたＲＦ信号と、方向性結合器１１から出力された反射信号（アンテナ５により反射されて戻ってくる反射信号の一部）とを合成し、その合成信号を検波器１５に出力するアナログ回路である。
　なお、可変減衰器１２、可変移相器１３及び合成器１４から信号合成手段が構成されている。 The variable attenuator 12 is an analog circuit that adjusts the amplitude of the RF signal (part of the RF signal amplified by the power amplifier 2) output from the directional coupler 11 according to a set value.
The variable phase shifter 13 is an analog circuit that adjusts the phase of the RF signal whose amplitude is adjusted by the variable attenuator 12 according to a set value.
Although FIG. 1 shows an example in which the variable attenuator 12 is arranged before the variable phase shifter 13, the variable attenuator 12 may be arranged after the variable phase shifter 13.
The synthesizer 14 includes an RF signal whose amplitude and phase are adjusted by the variable attenuator 12 and the variable phase shifter 13, and a reflected signal output from the directional coupler 11 (a reflected signal that is reflected by the antenna 5 and returned). And an analog circuit that outputs the combined signal to the detector 15.
The variable attenuator 12, the variable phase shifter 13, and the synthesizer 14 constitute a signal synthesizer.
　検波器１５は合成器１４から出力された合成信号の振幅を検波するアナログ回路である。
　制御回路１６は検波器１５により検波された合成信号の振幅が予め設定された閾値（所定値）以下であれば、可変整合回路１７のインピーダンスを制御、または、可変整合回路１７のインピーダンス及び電力増幅器２のバイアス条件を制御するアナログ回路である。
　また、制御回路１６は検波器１５により検波された合成信号の振幅が閾値以下であれば、可変減衰器１２及び可変移相器１３の設定値を切り換える処理を実施する。
　可変整合回路１７は方向性結合器１１とアンテナ５の間に挿入されており、制御回路１６の制御の下で、インピーダンスが調整されるアナログ回路である。なお、可変整合回路１７はインピーダンス整合回路を構成している。 The detector 15 is an analog circuit that detects the amplitude of the combined signal output from the combiner 14.
The control circuit 16 controls the impedance of the variable matching circuit 17 or the impedance of the variable matching circuit 17 and the power amplifier if the amplitude of the combined signal detected by the detector 15 is not more than a preset threshold value (predetermined value). 2 is an analog circuit for controlling the second bias condition.
Further, if the amplitude of the combined signal detected by the detector 15 is equal to or less than the threshold value, the control circuit 16 performs a process of switching the set values of the variable attenuator 12 and the variable phase shifter 13.
The variable matching circuit 17 is inserted between the directional coupler 11 and the antenna 5 and is an analog circuit whose impedance is adjusted under the control of the control circuit 16. The variable matching circuit 17 constitutes an impedance matching circuit.
　次に動作について説明する。
　電力増幅器２は、ＲＦ入力端子１から送信信号であるＲＦ信号が入力されると、そのＲＦ信号を増幅し、増幅後のＲＦ信号をインピーダンスチューナ３に出力する。
　電力増幅器２により増幅されたＲＦ信号は、インピーダンスチューナ３を通過したのち、アンテナ５から空間に放射される。 Next, the operation will be described.
When an RF signal as a transmission signal is input from the RF input terminal 1, the power amplifier 2 amplifies the RF signal and outputs the amplified RF signal to the impedance tuner 3.
The RF signal amplified by the power amplifier 2 passes through the impedance tuner 3 and is then radiated from the antenna 5 to the space.
　このとき、インピーダンスチューナ３は、電力増幅器２からアンテナ５側を見たインピーダンスを検出し、その検出結果にしたがって、電力増幅器２とアンテナ５の間に挿入されている可変整合回路１７のインピーダンスを制御することで、電力増幅器２の特性（例えば、効率、歪み特性など）の改善を図る。
　以下、インピーダンスチューナ３の処理内容を具体的に説明する。 At this time, the impedance tuner 3 detects the impedance when the antenna 5 is viewed from the power amplifier 2 and controls the impedance of the variable matching circuit 17 inserted between the power amplifier 2 and the antenna 5 according to the detection result. By doing so, the characteristics (for example, efficiency, distortion characteristics, etc.) of the power amplifier 2 are improved.
The processing contents of the impedance tuner 3 will be specifically described below.
　図２は電力増幅器２からアンテナ５側を見た負荷インピーダンスの一例を示すスミスチャートである。
　図２の例では、領域Ａと領域Ｂが記述されており、一般的には、電力増幅器２の特性は、負荷インピーダンスがスミスチャートの周囲にある場合より、スミスチャートの中央にある場合の方が良好になる。
　この実施の形態１では、説明の便宜上、負荷インピーダンスが領域Ａ内に存在するより、領域Ｂ内に存在する方が、電力増幅器２の特性が良好になるものとして説明する。
　なお、電力増幅器２の設計段階で、負荷インピーダンスがどの位置にあれば、特性が良好であるかは認識可能である。 FIG. 2 is a Smith chart showing an example of load impedance when the antenna 5 is viewed from the power amplifier 2.
In the example of FIG. 2, region A and region B are described. In general, the characteristics of the power amplifier 2 are those in the case where the load impedance is in the center of the Smith chart than in the vicinity of the Smith chart. Will be better.
In the first embodiment, for convenience of explanation, it is assumed that the characteristics of the power amplifier 2 are better when the load impedance is present in the region B than in the region A.
In the design stage of the power amplifier 2, it is possible to recognize where the load impedance is and where the characteristics are good.
　インピーダンスチューナ３の方向性結合器１１は、電力増幅器２により増幅されたＲＦ信号ＶＳの一部を抽出し、その一部の信号ｋ・ＶＳを可変減衰器１２に出力する。ｋは方向性結合器１１の結合率である。
　また、方向性結合器１１は、アンテナ５により反射されて戻ってくるＲＦ信号ＶＳの反射信号ＶＲの一部を抽出し、その一部の信号ｋ・ＶＲを合成器１４に出力する。
　　　ＶＲ＝ＶＳ・ΓＬ　　　　　　　　　　　　　　　　　　　　　　（１）
　式（１）において、ΓＬは電力増幅器２からアンテナ５側を見た反射係数である。 The directional coupler 11 of the impedance tuner 3 extracts a part of the RF signal V S amplified by the power amplifier 2 and outputs a part of the signal k · V S to the variable attenuator 12. k is a coupling rate of the directional coupler 11.
Further, the directional coupler 11 extracts part of the reflected signal V R of the RF signal V S coming back after being reflected by the antenna 5, and outputs a part of the signal k · V R to the combiner 14 .
V R = V S · Γ L (1)
In Expression (1), Γ L is a reflection coefficient when the antenna 5 side is viewed from the power amplifier 2.
　可変減衰器１２は、方向性結合器１１からＲＦ信号ｋ・ＶＳを受けると、現在の設定値χで、そのＲＦ信号ｋ・ＶＳの振幅を調整する。
　可変移相器１３は、可変減衰器１２から振幅調整後のＲＦ信号ｋ・χ・ＶＳを受けると、位相調整後のＲＦ信号が方向性結合器１１から出力された反射信号ＶＲと逆位相になるようにした上で、更に現在の設定値φでそのＲＦ信号ｋ・χ・ＶＳの位相を調整する。
　即ち、可変移相器１３は、可変減衰器１２から出力されたＲＦ信号ｋ・χ・ＶＳの位相を（φ＋π）の移相量で調整する。 When receiving the RF signal k · V S from the directional coupler 11, the variable attenuator 12 adjusts the amplitude of the RF signal k · V S with the current set value χ.
Variable phase shifter 13 receives the RF signal k · χ · V S after amplitude adjustment by the variable attenuator 12, the reflected signal V R and reverse RF signal after phase adjustment is output from the directional coupler 11 After the phase is reached, the phase of the RF signal k · χ · V S is further adjusted with the current set value φ.
That is, the variable phase shifter 13 adjusts the phase of the RF signal k · χ · V S output from the variable attenuator 12 by the phase shift amount of (φ + π).
　合成器１４は、可変移相器１３から振幅・位相調整後のＲＦ信号ｋ・χ・ＶＳを受けると、そのＲＦ信号ｋ・χ・ＶＳと、方向性結合器１１から出力された反射信号ｋ・ＶＲとを合成し、その合成信号を検波器１５に出力する。
　検波器１５は、合成器１４から合成信号を受けると、その合成信号の振幅｜ＶＤＥＴ｜を検波する。
　検波器１５により検波される合成信号の振幅｜ＶＤＥＴ｜は、下記の式（２）で表される。
Figure JPOXMLDOC01-appb-I000001
　この実施の形態１では、電力増幅器２からアンテナ５側を見た反射係数ΓＬが、可変減衰器１２及び可変移相器１３の設定値χ・ｅｊφに近づくと、合成信号の振幅｜ＶＤＥＴ｜が小さくなる。 When the synthesizer 14 receives the RF signal k · χ · V S after amplitude / phase adjustment from the variable phase shifter 13, the synthesizer 14 reflects the RF signal k · χ · V S and the reflection output from the directional coupler 11. It synthesizes the signal k · V R, and outputs the combined signal to the detector 15.
When receiving the synthesized signal from the synthesizer 14, the detector 15 detects the amplitude | V DET | of the synthesized signal.
The amplitude | V DET | of the combined signal detected by the detector 15 is expressed by the following equation (2).
Figure JPOXMLDOC01-appb-I000001
In the first embodiment, when the reflection coefficient Γ L viewed from the power amplifier 2 toward the antenna 5 approaches the set value χ · e jφ of the variable attenuator 12 and the variable phase shifter 13, the amplitude of the combined signal | V DET | becomes smaller.
　ここで、図３は検波器１５により検波される合成信号の振幅｜ＶＤＥＴ｜の一例を示す説明図である。
　図３の例では、可変減衰器１２の設定値χがχ１（第１の設定値）に設定され、かつ、可変移相器１３の設定値φがφ１（第１の設定値）に設定されると、合成信号の振幅｜ＶＤＥＴ｜が予め設定された閾値以下になり、負荷インピーダンスが領域Ａ内に存在することを表している（図２を参照）。この状態は、電力増幅器２の特性が良好な状態ではない。
　電力増幅器２の特性は、可変減衰器１２の設定値χや可変移相器１３の設定値φを調整しなくても、可変整合回路１７のインピーダンスの調整や、電力増幅器２のバイアス条件の変更（例えば、電力増幅器２のゲート電圧の変更）を行うことで変えることができる。 Here, FIG. 3 is an explanatory diagram showing an example of the amplitude | V DET | of the combined signal detected by the detector 15.
In the example of FIG. 3, the set value χ of the variable attenuator 12 is set to χ 1 (first set value), and the set value φ of the variable phase shifter 13 is set to φ 1 (first set value). When set, the amplitude | V DET | of the combined signal is equal to or less than a preset threshold value, indicating that the load impedance exists in the region A (see FIG. 2). In this state, the characteristics of the power amplifier 2 are not good.
The characteristic of the power amplifier 2 is that the impedance of the variable matching circuit 17 is adjusted and the bias condition of the power amplifier 2 is changed without adjusting the setting value χ of the variable attenuator 12 and the setting value φ of the variable phase shifter 13. It can be changed by performing (for example, changing the gate voltage of the power amplifier 2).
　そこで、制御回路１６は、検波器１５により検波された合成信号の振幅｜ＶＤＥＴ｜と予め設定された閾値を比較し、その合成信号の振幅｜ＶＤＥＴ｜が閾値以下であれば、負荷インピーダンスが領域Ａ内から領域Ｂ内に移動するように、可変整合回路１７のインピーダンスを制御する。
　この負荷インピーダンスの制御だけで電力増幅器２の特性が十分に改善されない場合には（負荷インピーダンスが領域Ａ内から領域Ｂ内に移動しても所望の性能に到達しない場合には）、電力増幅器２のバイアス条件の制御を組み合わせて実行するようにしてもよい。 Therefore, the control circuit 16 compares the amplitude | V DET | of the composite signal detected by the detector 15 with a preset threshold value, and if the amplitude | V DET | Controls the impedance of the variable matching circuit 17 so that the signal moves from the region A to the region B.
When the characteristics of the power amplifier 2 are not sufficiently improved only by controlling the load impedance (when the load impedance does not reach the desired performance even if the load impedance moves from the area A to the area B), the power amplifier 2 The control of the bias conditions may be executed in combination.
　例えば、可変整合回路１７のインピーダンスの制御と同時に、可変減衰器１２及び可変移相器１３の設定値の制御を行う場合において、可変減衰器１２の設定値χがχ１に設定され、かつ、可変移相器１３の設定値φがφ１に設定されているとき、合成信号の振幅｜ＶＤＥＴ｜が閾値以下になる状況下では（図３の状態１）、可変減衰器１２の設定値χをχ２（第２の設定値）に変更し、かつ、可変移相器１３の設定値φをφ２（第２の設定値）に変更するような制御を行う。
　または、第２の設定値である設定値χ２としては、設定値χ１の場合よりも、可変減衰器１２の減衰量が大きくなるような値へと変更、あるいは、可変減衰器１２の出力信号がゼロになるように、経路をスイッチ等で切断するなどして、ＲＦ信号ＶＳの寄与を低減又は無くす状態を作り出すような制御を行う。 For example, when controlling the set values of the variable attenuator 12 and the variable phase shifter 13 simultaneously with the control of the impedance of the variable matching circuit 17, the set value χ of the variable attenuator 12 is set to χ 1 , and When the set value φ of the variable phase shifter 13 is set to φ 1 , the set value of the variable attenuator 12 is set under the situation where the amplitude | V DET | Control is performed such that χ is changed to χ 2 (second set value) and the set value φ of the variable phase shifter 13 is changed to φ 2 (second set value).
Alternatively, the setting value χ 2 that is the second setting value is changed to a value that makes the attenuation amount of the variable attenuator 12 larger than the case of the setting value χ 1 or the output of the variable attenuator 12. Control is performed so as to create a state in which the contribution of the RF signal V S is reduced or eliminated by cutting the path with a switch or the like so that the signal becomes zero.
　上記の制御によって、合成信号の振幅｜ＶＤＥＴ｜が閾値以上になれば、可変減衰器１２の設定値χをχ１に戻し、かつ、可変移相器１３の設定値φをφ１に戻すような制御を行う。
　これにより、可変整合回路１７のインピーダンスの調整、あるいは、電力増幅器２のバイアス条件の変更を行った後でも、引き続き、インピーダンスの調整やバイアス条件の変更を行うことができる。 If the amplitude | V DET | of the combined signal becomes equal to or greater than the threshold value by the above control, the set value χ of the variable attenuator 12 is returned to χ 1 and the set value φ of the variable phase shifter 13 is returned to φ 1 . Perform such control.
Thereby, even after the adjustment of the impedance of the variable matching circuit 17 or the change of the bias condition of the power amplifier 2, the adjustment of the impedance or the change of the bias condition can be continued.
　以上で明らかなように、この実施の形態１によれば、方向性結合器１１とアンテナ５の間に挿入された可変整合回路１７と、電力増幅器２により増幅されたＲＦ信号を検出するとともに、アンテナ５により反射されて戻ってくるＲＦ信号の反射信号を検出する方向性結合器１１と、方向性結合器１１により検出されたＲＦ信号の振幅を調整する可変減衰器１２と、可変減衰器１２により振幅が調整されたＲＦ信号の位相を調整する可変移相器１３と、可変移相器１３により位相が調整されたＲＦ信号と反射信号を合成する合成器１４とを設け、制御回路１６が、合成器１４による合成信号の振幅｜ＶＤＥＴ｜が閾値以下であれば、可変整合回路１７のインピーダンスを制御するように構成したので、局部発振器やＡ／Ｄ変換器などを備えている大きなアナログ回路や、ディジタル回路を実装することなく、電力増幅器２からアンテナ５側を見たインピーダンスを調整することができるようになり、その結果、装置全体の回路の小型化を図ることができる効果を奏する。
　また、電力増幅器２のバイアス条件が変更された場合、電力増幅器２の効率が改善されて、低消費電力化を図ることも可能である。 As apparent from the above, according to the first embodiment, the variable matching circuit 17 inserted between the directional coupler 11 and the antenna 5 and the RF signal amplified by the power amplifier 2 are detected, A directional coupler 11 that detects a reflected signal of the RF signal reflected and returned by the antenna 5, a variable attenuator 12 that adjusts the amplitude of the RF signal detected by the directional coupler 11, and a variable attenuator 12. A variable phase shifter 13 that adjusts the phase of the RF signal whose amplitude is adjusted by the above, and a combiner 14 that combines the RF signal whose phase is adjusted by the variable phase shifter 13 and the reflected signal. , combiner 14 combining signals of an amplitude by | V DET | if it below the threshold, since it is configured to control the impedance of the variable matching circuit 17, provided with such local oscillator and a / D converter The impedance of the power amplifier 2 viewed from the antenna 5 side can be adjusted without mounting a large analog circuit or digital circuit. As a result, the circuit of the entire apparatus can be reduced in size. There is an effect.
In addition, when the bias condition of the power amplifier 2 is changed, the efficiency of the power amplifier 2 can be improved and the power consumption can be reduced.
　即ち、この実施の形態１によれば、従来例のように、進行波であるＲＦ信号ＶＳと、反射波である反射信号ＶＲとの振幅差や位相差を検出することなく、合成信号の振幅｜ＶＤＥＴ｜が閾値以下であるか否かを判定するだけで、現在、電力増幅器２の特性が良好な状態であるか否かを判別することができる。
　合成信号の振幅｜ＶＤＥＴ｜が閾値以下であるか否かを判定するには、図１に示すように、アナログ回路（可変減衰器１２、可変移相器１３、合成器１４、検波器１５及び制御回路１６）を実装する必要があるが、このアナログ回路は、ディジタル回路（図５の振幅比較回路１０９、位相比較回路１１０、制御回路１１１）と比べて小さな回路で構成されるため、装置全体の回路の小型化を図ることができる。
　上述したように、局部発振器やＡ／Ｄ変換器などを備えている周波数変換回路１０７，１０８などの大きなアナログ回路も不要である。 That is, according to the first embodiment, as in the conventional example, the RF signal V S is a traveling wave, without detecting the amplitude difference and phase difference between the reflected signal V R is the reflected wave, the combined signal It is possible to determine whether or not the characteristics of the power amplifier 2 are currently in good condition simply by determining whether or not the amplitude | V DET |
In order to determine whether or not the amplitude | V DET | of the combined signal is equal to or less than a threshold value, as shown in FIG. 1, analog circuits (a variable attenuator 12, a variable phase shifter 13, a combiner 14, and a detector 15 are included. And the control circuit 16), the analog circuit is composed of a circuit smaller than the digital circuit (the amplitude comparison circuit 109, the phase comparison circuit 110, and the control circuit 111 in FIG. 5). The entire circuit can be reduced in size.
As described above, a large analog circuit such as the frequency conversion circuits 107 and 108 including a local oscillator and an A / D converter is also unnecessary.
実施の形態２．
　図４はこの発明の実施の形態２による電力増幅装置を示す構成図であり、図において、図１と同一符号は同一または相当部分を示すので説明を省略する。
　スイッチ２１はＲＦ入力端子１から入力されるＲＦ信号（送信信号）の周波数を示す周波数情報を入力し、その周波数が周波数Ａであれば、方向性結合器１１の出力信号であるＲＦ信号ＶＳを可変整合回路１７ａに出力し、周波数Ｂであれば、方向性結合器１１の出力信号であるＲＦ信号ＶＳを可変整合回路１７ｂに出力する第１の切換スイッチである。
　可変整合回路１７ａは動作可能な周波数範囲内に周波数Ａを含んでおり、制御回路２４の制御の下で、インピーダンスが調整されるアナログ回路である。
　可変整合回路１７ｂは動作可能な周波数範囲内に周波数Ｂを含んでおり、制御回路２４の制御の下で、インピーダンスが調整されるアナログ回路である。
　なお、可変整合回路１７ａ，１７ｂはインピーダンス整合回路を構成している。 Embodiment 2. FIG.
4 is a block diagram showing a power amplifying device according to Embodiment 2 of the present invention. In the figure, the same reference numerals as those in FIG.
The switch 21 receives frequency information indicating the frequency of the RF signal (transmission signal) input from the RF input terminal 1, and if the frequency is the frequency A, the RF signal V S that is the output signal of the directional coupler 11. Is output to the variable matching circuit 17a. When the frequency is B, the first changeover switch outputs the RF signal V S that is the output signal of the directional coupler 11 to the variable matching circuit 17b.
The variable matching circuit 17 a is an analog circuit that includes the frequency A within an operable frequency range and whose impedance is adjusted under the control of the control circuit 24.
The variable matching circuit 17 b is an analog circuit that includes the frequency B within the operable frequency range and whose impedance is adjusted under the control of the control circuit 24.
The variable matching circuits 17a and 17b constitute an impedance matching circuit.
　デュプレクサ２２ａは可変整合回路１７ａの出力信号をスイッチ２３に出力する一方、スイッチ２３から出力された受信信号を受信回路２５に出力する処理を実施する。
　デュプレクサ２２ｂは可変整合回路１７ａの出力信号をスイッチ２３に出力する一方、スイッチ２３から出力された受信信号を受信回路２５に出力する処理を実施する。
　スイッチ２３はＲＦ入力端子１から入力されるＲＦ信号の周波数を示す周波数情報を入力し、その周波数が周波数Ａであれば、デュプレクサ２２ａの出力信号をＲＦ出力端子４に出力し、周波数Ｂであれば、デュプレクサ２２ｂの出力信号をＲＦ出力端子４に出力する第２の切換スイッチである。 The duplexer 22 a outputs the output signal of the variable matching circuit 17 a to the switch 23, while executing the process of outputting the reception signal output from the switch 23 to the reception circuit 25.
The duplexer 22b performs a process of outputting the output signal of the variable matching circuit 17a to the switch 23 while outputting the reception signal output from the switch 23 to the reception circuit 25.
The switch 23 inputs frequency information indicating the frequency of the RF signal input from the RF input terminal 1. If the frequency is frequency A, the output signal of the duplexer 22 a is output to the RF output terminal 4. For example, the second changeover switch outputs the output signal of the duplexer 22b to the RF output terminal 4.
　制御回路２４は検波器１５により検波された合成信号の振幅が閾値以下であれば、可変整合回路１７ａ，１７ｂのインピーダンスを制御、または、可変整合回路１７ａ，１７ｂのインピーダンス及び電力増幅器２のバイアス条件を制御するアナログ回路である。
　また、制御回路２４は図１の制御回路１６と同様に、検波器１５により検波された合成信号の振幅が閾値以下であれば、可変減衰器１２及び可変移相器１３の設定値を切り換える処理を実施する。
　受信回路２５はデュプレクサ２２ａ，２２ｂから出力された受信信号を復調するなどの処理を実施する。 The control circuit 24 controls the impedance of the variable matching circuits 17a and 17b or the bias condition of the power amplifier 2 and the impedance of the variable matching circuits 17a and 17b if the amplitude of the combined signal detected by the detector 15 is less than the threshold value. It is an analog circuit that controls
Similarly to the control circuit 16 of FIG. 1, the control circuit 24 switches the setting values of the variable attenuator 12 and the variable phase shifter 13 if the amplitude of the combined signal detected by the detector 15 is equal to or less than the threshold value. To implement.
The reception circuit 25 performs processing such as demodulating the reception signals output from the duplexers 22a and 22b.
　次に動作について説明する。
　上記実施の形態１では、方向性結合器１１の出力信号であるＲＦ信号ＶＳが可変整合回路１７に出力され、可変整合回路１７の出力信号がＲＦ出力端子４に出力されるものを示したが、スイッチ２１によって、方向性結合器１１の出力信号であるＲＦ信号ＶＳの出力経路が適宜切り換えられる点で相違している。 Next, the operation will be described.
In the first embodiment, the RF signal V S that is the output signal of the directional coupler 11 is output to the variable matching circuit 17 and the output signal of the variable matching circuit 17 is output to the RF output terminal 4. However, the switch 21 is different in that the output path of the RF signal V S that is the output signal of the directional coupler 11 is appropriately switched.
　可変整合回路１７が動作可能な周波数範囲は、ある決まった範囲であり、その周波数範囲外の信号については、簡単な回路構成では取り扱うことができない。
　そこで、この実施の形態２では、ＲＦ入力端子１から入力されるＲＦ信号が周波数Ａであれば、動作可能な周波数範囲内に周波数Ａを含んでいる可変整合回路１７ａに出力し、そのＲＦ信号が周波数Ｂであれば、動作可能な周波数範囲内に周波数Ｂを含んでいる可変整合回路１７ｂに出力するようにしている。 The frequency range in which the variable matching circuit 17 can operate is a certain range, and signals outside the frequency range cannot be handled with a simple circuit configuration.
Therefore, in the second embodiment, if the RF signal input from the RF input terminal 1 is the frequency A, the RF signal is output to the variable matching circuit 17a including the frequency A within the operable frequency range. Is a frequency B, it is outputted to the variable matching circuit 17b including the frequency B within the operable frequency range.
　即ち、スイッチ２１は、ＲＦ入力端子１から入力されるＲＦ信号の周波数を示す周波数情報を参照し、その周波数が周波数Ａであれば、方向性結合器１１の出力信号であるＲＦ信号ＶＳを可変整合回路１７ａに出力し、周波数Ｂであれば、方向性結合器１１の出力信号であるＲＦ信号ＶＳを可変整合回路１７ｂに出力する。
　また、スイッチ２３は、ＲＦ入力端子１から入力されるＲＦ信号の周波数を示す周波数情報を参照し、その周波数が周波数Ａであれば、デュプレクサ２２ａの出力信号をＲＦ出力端子４に出力し、周波数Ｂであれば、デュプレクサ２２ｂの出力信号をＲＦ出力端子４に出力する。 That is, the switch 21 refers to the frequency information indicating the frequency of the RF signal input from the RF input terminal 1. If the frequency is the frequency A, the switch 21 outputs the RF signal V S that is the output signal of the directional coupler 11. If the frequency B is output to the variable matching circuit 17a, the RF signal V S output from the directional coupler 11 is output to the variable matching circuit 17b.
Further, the switch 23 refers to frequency information indicating the frequency of the RF signal input from the RF input terminal 1, and if the frequency is the frequency A, the output signal of the duplexer 22 a is output to the RF output terminal 4. If B, the output signal of the duplexer 22 b is output to the RF output terminal 4.
　制御回路２４は、基本的に、図１の制御回路１６と同様であり、制御回路１６が、１つの可変整合回路１７のインピーダンスを制御しているのに対して、２つの可変整合回路１７ａ，１７ｂのインピーダンスを制御している点で相違している。
　なお、この実施の形態１では、送信信号であるＲＦ信号だけではなく、アンテナ５の受信信号を取り扱えるようにするため、デュプレクサ２２ａ，２２ｂを実装している。
　この実施の形態２でも、上記実施の形態１と同様に、装置全体の回路の小型化を図ることができる効果を奏する。
　また、電力増幅器２のバイアス条件が変更された場合、電力増幅器２の効率が改善されて、低消費電力化を図ることも可能である。 The control circuit 24 is basically the same as the control circuit 16 shown in FIG. 1, and the control circuit 16 controls the impedance of one variable matching circuit 17, whereas the two variable matching circuits 17a, 17a, The difference is that the impedance of 17b is controlled.
In the first embodiment, duplexers 22a and 22b are mounted in order to handle not only the RF signal as a transmission signal but also the reception signal of the antenna 5.
Also in the second embodiment, as in the first embodiment, the circuit of the entire apparatus can be reduced in size.
In addition, when the bias condition of the power amplifier 2 is changed, the efficiency of the power amplifier 2 can be improved and the power consumption can be reduced.
　なお、本願発明はその発明の範囲内において、各実施の形態の自由な組み合わせ、あるいは各実施の形態の任意の構成要素の変形、もしくは各実施の形態において任意の構成要素の省略が可能である。 In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .
　この発明に係る電力増幅装置は、電力増幅器を用いて、送信信号の電力を増幅する際、その電力増幅器の特性を改善する必要があるものに適している。 The power amplifying device according to the present invention is suitable for a device that needs to improve the characteristics of the power amplifier when the power of the transmission signal is amplified using the power amplifier.
　１　ＲＦ入力端子、２　電力増幅器、３　インピーダンスチューナ、４　ＲＦ出力端子、５　アンテナ、１１　方向性結合器（信号検出手段）、１２　可変減衰器（信号合成手段）、１３　可変移相器（信号合成手段）、１４　合成器（信号合成手段）、１５　検波器、１６　制御回路、１７，１７ａ，１７ｂ　可変整合回路（インピーダンス整合回路）、２１　スイッチ（第１の切換スイッチ）、２２ａ，２２ｂ　デュプレクサ、２３　スイッチ（第２の切換スイッチ）、２４　制御回路、２５　受信回路、１０１　ＲＦ入力端子、１０２　電力増幅器、１０３　方向性結合器、１０４　可変整合回路、１０５　ＲＦ出力端子、１０６　アンテナ、１０７，１０８　周波数変換回路、１０９　振幅比較回路、１１０　位相比較回路、１１１　制御回路。 1 RF input terminal, 2 power amplifier, 3 impedance tuner, 4 RF output terminal, 5 antenna, 11 directional coupler (signal detection means), 12 variable attenuator (signal synthesis means), 13 variable phase shifter (signal synthesis) Means), 14 combiner (signal combiner), 15 detector, 16 control circuit, 17, 17a, 17b variable matching circuit (impedance matching circuit), 21 switch (first changeover switch), 22a, 22b duplexer, 23 Switch (second changeover switch), 24 control circuit, 25 receiving circuit, 101 RF input terminal, 102 power amplifier, 103 directional coupler, 104 variable matching circuit, 105 RF output terminal, 106 antenna, 107, 108 frequency conversion Circuit, 109 amplitude comparison circuit, 110 phase comparison circuit, 11 Control circuit.

Claims (9)

  1. 　送信信号を増幅する電力増幅器と、
    　上記電力増幅器により増幅された送信信号を空間に放射するアンテナと、
    　上記電力増幅器と上記アンテナの間に挿入されたインピーダンス整合回路と、
    　上記電力増幅器により増幅された送信信号を検出するとともに、上記アンテナにより反射されて戻ってくる上記送信信号の反射信号を検出する信号検出手段と、
    　上記信号検出手段により検出された送信信号又は反射信号の振幅及び位相を調整してから、上記送信信号と上記反射信号を合成する信号合成手段と、
    　上記信号合成手段による合成信号の振幅が所定値以下であれば、上記インピーダンス整合回路のインピーダンスを制御、または、上記インピーダンス整合回路のインピーダンス及び上記電力増幅器のバイアス条件を制御する制御回路とを備えた電力増幅装置。     A power amplifier for amplifying the transmission signal;
    An antenna that radiates the transmission signal amplified by the power amplifier to space;
    An impedance matching circuit inserted between the power amplifier and the antenna;
    A signal detection means for detecting a transmission signal amplified by the power amplifier and detecting a reflection signal of the transmission signal reflected and returned by the antenna;
    Signal synthesizing means for synthesizing the transmission signal and the reflected signal after adjusting the amplitude and phase of the transmission signal or reflected signal detected by the signal detecting means;
    A control circuit for controlling the impedance of the impedance matching circuit or controlling the impedance of the impedance matching circuit and the bias condition of the power amplifier if the amplitude of the synthesized signal by the signal synthesizing means is less than or equal to a predetermined value; Power amplification device.
  2. 　信号合成手段は、
    　信号検出手段により検出された送信信号又は反射信号の振幅を設定値にしたがって調整する可変減衰器と、
    　上記送信信号又は上記反射信号の位相を設定値にしたがって調整する可変移相器と、
    　上記可変減衰器及び上記可変移相器による調整後の上記送信信号と上記反射信号を合成する合成器とから構成されており、
    　制御回路は、上記合成器による合成信号の振幅が所定値以下であれば、上記可変減衰器及び上記可変移相器の設定値を切り換える
    　ことを特徴とする請求項１記載の電力増幅装置。     The signal synthesis means
    A variable attenuator for adjusting the amplitude of the transmission signal or the reflected signal detected by the signal detection means according to a set value;
    A variable phase shifter for adjusting the phase of the transmission signal or the reflected signal according to a set value;
    It is composed of a synthesizer that synthesizes the transmission signal and the reflected signal after adjustment by the variable attenuator and the variable phase shifter,
    2. The power amplifying apparatus according to claim 1, wherein the control circuit switches setting values of the variable attenuator and the variable phase shifter when an amplitude of a composite signal by the combiner is equal to or less than a predetermined value.
  3. 　制御回路は、合成器による合成信号の振幅が所定値以下である場合、可変減衰器及び可変移相器の現在の設定値が第１の設定値であれば、上記可変減衰器及び上記可変移相器の設定値を第２の設定値に切り換え、上記可変減衰器及び上記可変移相器の現在の設定値が第２の設定値であれば、上記可変減衰器及び上記可変移相器の設定値を第１の設定値に切り換えることを特徴とする請求項２記載の電力増幅装置。 When the amplitude of the synthesized signal by the synthesizer is less than or equal to a predetermined value, the control circuit, if the current set value of the variable attenuator and the variable phase shifter is the first set value, the variable attenuator and the variable shifter. If the set value of the phase shifter is switched to the second set value, and the current set value of the variable attenuator and the variable phase shifter is the second set value, the variable attenuator and the variable phase shifter 3. The power amplifying apparatus according to claim 2, wherein the set value is switched to the first set value.
  4. 　制御回路は、合成器による合成信号の振幅が所定値以下であれば、可変減衰器の減衰量が大きくなる設定値に切り換え、その後、信号検出手段により検出された反射信号の振幅が所定値を上回ると、上記可変減衰器の設定値を元の設定値に戻すことを特徴とする請求項２記載の電力増幅装置。 The control circuit switches to a setting value that increases the attenuation of the variable attenuator if the amplitude of the synthesized signal by the synthesizer is less than or equal to a predetermined value, and then the amplitude of the reflected signal detected by the signal detection means reaches the predetermined value. 3. The power amplifying apparatus according to claim 2, wherein when the value exceeds the set value, the set value of the variable attenuator is returned to the original set value.
  5. 　送信信号を増幅する電力増幅器と、
    　上記電力増幅器により増幅された送信信号を複数の経路の中のいずれかの経路に出力する第１の切換スイッチと、
    　各々の経路に挿入された複数のインピーダンス整合回路と、
    　上記インピーダンス整合回路の後段に配置された複数のデュプレクサと、
    　上記複数のデュプレクサの出力信号のいずれかを選択する第２の切換スイッチと、
    　上記第２の切換スイッチにより選択された出力信号を空間に放射するアンテナと、
    　上記電力増幅器により増幅された送信信号を検出するとともに、上記アンテナにより反射されて戻ってくる上記送信信号の反射信号を検出する信号検出手段と、
    　上記信号検出手段により検出された送信信号又は反射信号の振幅及び位相を調整してから、上記送信信号と上記反射信号を合成する信号合成手段と、
    　上記信号合成手段による合成信号の振幅が所定値以下であれば、上記インピーダンス整合回路のインピーダンスを制御、または、上記インピーダンス整合回路のインピーダンス及び上記電力増幅器のバイアス条件を制御する制御回路とを備えた電力増幅装置。     A power amplifier for amplifying the transmission signal;
    A first changeover switch for outputting a transmission signal amplified by the power amplifier to any one of a plurality of paths;
    A plurality of impedance matching circuits inserted in each path;
    A plurality of duplexers arranged in a subsequent stage of the impedance matching circuit;
    A second changeover switch for selecting one of the output signals of the plurality of duplexers;
    An antenna that radiates the output signal selected by the second changeover switch into space;
    A signal detection means for detecting a transmission signal amplified by the power amplifier and detecting a reflection signal of the transmission signal reflected and returned by the antenna;
    Signal synthesizing means for synthesizing the transmission signal and the reflected signal after adjusting the amplitude and phase of the transmission signal or reflected signal detected by the signal detecting means;
    A control circuit for controlling the impedance of the impedance matching circuit or controlling the impedance of the impedance matching circuit and the bias condition of the power amplifier if the amplitude of the synthesized signal by the signal synthesizing means is less than or equal to a predetermined value; Power amplification device.
  6. 　信号合成手段は、
    　信号検出手段により検出された送信信号又は反射信号の振幅を設定値にしたがって調整する可変減衰器と、
    　上記送信信号又は上記反射信号の位相を設定値にしたがって調整する可変移相器と、
    　上記可変減衰器及び上記可変移相器による調整後の上記送信信号と上記反射信号を合成する合成器とから構成されており、
    　制御回路は、上記合成器による合成信号の振幅が所定値以下であれば、上記可変減衰器及び上記可変移相器の設定値を切り換える
    　ことを特徴とする請求項５記載の電力増幅装置。     The signal synthesis means
    A variable attenuator for adjusting the amplitude of the transmission signal or the reflected signal detected by the signal detection means according to a set value;
    A variable phase shifter for adjusting the phase of the transmission signal or the reflected signal according to a set value;
    It is composed of a synthesizer that synthesizes the transmission signal and the reflected signal after adjustment by the variable attenuator and the variable phase shifter,
    6. The power amplifying apparatus according to claim 5, wherein the control circuit switches setting values of the variable attenuator and the variable phase shifter if the amplitude of the synthesized signal by the synthesizer is equal to or less than a predetermined value.
  7. 　制御回路は、合成器による合成信号の振幅が所定値以下である場合、可変減衰器及び可変移相器の現在の設定値が第１の設定値であれば、上記可変減衰器及び上記可変移相器の設定値を第２の設定値に切り換え、上記可変減衰器及び上記可変移相器の現在の設定値が第２の設定値であれば、上記可変減衰器及び上記可変移相器の設定値を第１の設定値に切り換えることを特徴とする請求項６記載の電力増幅装置。 When the amplitude of the synthesized signal by the synthesizer is less than or equal to a predetermined value, the control circuit, if the current set value of the variable attenuator and the variable phase shifter is the first set value, the variable attenuator and the variable shifter. If the set value of the phase shifter is switched to the second set value, and the current set value of the variable attenuator and the variable phase shifter is the second set value, the variable attenuator and the variable phase shifter The power amplification device according to claim 6, wherein the set value is switched to the first set value.
  8. 　制御回路は、合成器による合成信号の振幅が所定値以下であれば、可変減衰器の減衰量が大きくなる設定値に切り換え、その後、信号検出手段により検出された反射信号の振幅が所定値を上回ると、上記可変減衰器の設定値を元の設定値に戻すことを特徴とする請求項６記載の電力増幅装置。 The control circuit switches to a setting value that increases the attenuation of the variable attenuator if the amplitude of the synthesized signal by the synthesizer is less than or equal to a predetermined value, and then the amplitude of the reflected signal detected by the signal detection means reaches the predetermined value. The power amplifying apparatus according to claim 6, wherein if it exceeds, the set value of the variable attenuator is returned to the original set value.
  9. 　送信信号を増幅する電力増幅器と上記電力増幅器により増幅された送信信号を空間に放射するアンテナとの間に挿入されたインピーダンス整合回路と、
    　上記電力増幅器により増幅された送信信号を検出するとともに、上記アンテナにより反射されて戻ってくる上記送信信号の反射信号を検出する信号検出手段と、
    　上記信号検出手段により検出された送信信号又は反射信号の振幅及び位相を調整してから、上記送信信号と上記反射信号を合成する信号合成手段と、
    　上記信号合成手段による合成信号の振幅が所定値以下であれば、上記インピーダンス整合回路のインピーダンスを制御、または、上記インピーダンス整合回路のインピーダンス及び上記電力増幅器のバイアス条件を制御する制御回路とを備えたインピーダンスチューナ。     An impedance matching circuit inserted between a power amplifier that amplifies the transmission signal and an antenna that radiates the transmission signal amplified by the power amplifier to space;
    A signal detection means for detecting a transmission signal amplified by the power amplifier and detecting a reflection signal of the transmission signal reflected and returned by the antenna;
    Signal synthesizing means for synthesizing the transmission signal and the reflected signal after adjusting the amplitude and phase of the transmission signal or reflected signal detected by the signal detecting means;
    A control circuit for controlling the impedance of the impedance matching circuit or controlling the impedance of the impedance matching circuit and the bias condition of the power amplifier if the amplitude of the synthesized signal by the signal synthesizing means is less than or equal to a predetermined value; Impedance tuner.
PCT/JP2013/054945 2013-02-26 2013-02-26 Power amplifier and impedance tuner WO2014132337A1 (en)

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WO2019221324A1 (en) * 2018-05-18 2019-11-21 주식회사 웨이브피아 Power oscillator using gan power amplifier

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JP2004072548A (en) * 2002-08-08 2004-03-04 Hitachi Ltd High frequency amplifier
JP2007096585A (en) * 2005-09-28 2007-04-12 Renesas Technology Corp Electronic component for high-frequency power amplification

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Publication number Priority date Publication date Assignee Title
JP2004072548A (en) * 2002-08-08 2004-03-04 Hitachi Ltd High frequency amplifier
JP2007096585A (en) * 2005-09-28 2007-04-12 Renesas Technology Corp Electronic component for high-frequency power amplification

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019221324A1 (en) * 2018-05-18 2019-11-21 주식회사 웨이브피아 Power oscillator using gan power amplifier
CN112425069A (en) * 2018-05-18 2021-02-26 炜宝皮亚股份有限公司 Power oscillator using gallium nitride power amplifier

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