WO2019026669A1 - Wireless device and wireless output amplification method - Google Patents

Wireless device and wireless output amplification method Download PDF

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Publication number
WO2019026669A1
WO2019026669A1 PCT/JP2018/027502 JP2018027502W WO2019026669A1 WO 2019026669 A1 WO2019026669 A1 WO 2019026669A1 JP 2018027502 W JP2018027502 W JP 2018027502W WO 2019026669 A1 WO2019026669 A1 WO 2019026669A1
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voltage
unit
amplifier
wireless device
main amplifier
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PCT/JP2018/027502
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French (fr)
Japanese (ja)
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堂坂　淳也
石神　武
暢人 渡口
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株式会社日立国際電気
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Priority to JP2019534046A priority Critical patent/JP6836650B2/en
Publication of WO2019026669A1 publication Critical patent/WO2019026669A1/en

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    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • 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

Definitions

  • the present invention relates to a technique of controlling a voltage supplied to a main amplifier for amplifying a wireless output by an ET method.
  • quadrature modulation can be roughly classified into analog modulation or digital modulation.
  • the analog method can be realized at relatively low cost, has an affinity for distortion compensation technology of baseband feedback such as Cartesian, and has an advantage that it can be directly converted to a desired frequency.
  • baseband feedback such as Cartesian
  • the digital system since they are digital and orthogonal, there is an advantage that adjustment of amplitude balance, orthogonality and DC is unnecessary.
  • it is difficult to adopt direct conversion in a digital system because a high-speed DAC (Digital Analog Converter) is required and the cost is high.
  • Digital Analog Converter Digital Analog Converter
  • FIG. 1 shows a schematic configuration of a radio unit and an amplifier power supply unit in a conventional radio.
  • the amplifier power supply unit includes a DC power supply unit 130, an ET output unit 140, and a control unit 150, and supplies power to the main amplifier 110 constituting the wireless unit.
  • the wireless unit includes a control unit 150, DACs 121 and 122, an analog quadrature modulation unit 123, and a main amplifier (PA: Power Amplifier) 110.
  • PA Power Amplifier
  • the control unit 150 includes an FPGA (Field Programmable Gate Array) 151 and a DSP (Digital Signal Processor) 152, and acquires an IQ signal.
  • the control unit 150 When the control unit 150 functions as part of the wireless unit, the control unit 150 outputs the I signal and the Q signal to the DACs 121 and 122, respectively. Further, when functioning as part of the amplifier power supply unit, the control unit 150 controls the ET output unit 140 to control the supply voltage to the main amplifier 110. For example, the control unit 150 calculates an envelope from the IQ signal by so-called power calculation, and outputs the calculation result to the ET output unit 140.
  • the DACs 121 and 122 perform analog conversion on the I signal and the Q signal, and output the analog signal to the analog quadrature modulator 123.
  • the signal modulated by the analog quadrature modulator 123 is amplified by the main amplifier 110 and transmitted from the antenna. Also, the output of the main amplifier 110 is fed back to the analog quadrature modulator 123 to form a predetermined cartesian feedback.
  • the Lo signal of the analog quadrature modulation unit 123 variable, it is possible to cope with various frequencies.
  • the ET output unit 140 includes a PWM (Pulse Width Modulation) unit 141, a class D amplifier 145, and a filter 146.
  • the PWM unit 141 includes a DAC 142, a triangular wave generation circuit 143, and a comparator 144.
  • the DAC 142 converts the calculation result of the envelope acquired from the control unit 150 into an analog signal, and outputs the analog signal to the comparator 144.
  • the comparator 144 generates a PWM signal for ET from the analog waveform of the envelope output from the DAC 142 and the triangular wave (switching waveform) output from the triangular wave generation circuit 143.
  • the PWM signal for ET is amplified by the class D amplifier 145 based on the DC voltage from the DC power supply unit 130, returned to the original analog waveform (envelope) by the filter 146, and supplied to the main amplifier 110 as the ET voltage. .
  • a filter is required at the stage subsequent to the class D amplifier in the ET output unit in order to return the PWM signal to the original analog waveform (envelope).
  • ET voltage is often used for the main amplifier of the final stage in amplification
  • the switching frequency is superimposed on the amplification element as it is depending on the characteristics of the filter, and there is a problem that spurious results appear as amplification results (see FIG. 6A). is there.
  • the present invention has been made in view of the above-described conventional circumstances, and proposes an effective technique for miniaturizing a filter of an ET output unit in a wireless device that amplifies a wireless output by the ET method. With the goal.
  • a first aspect of the present invention is a radio apparatus comprising: a main amplifier for amplifying a signal to be transmitted by radio; and an ET output unit for outputting an ET voltage following the envelope of the signal and supplying the ET voltage to the main amplifier.
  • the ET output unit operates based on a switching waveform of a predetermined frequency, and a distribution unit for distributing the ET voltage to the amplifier at the front stage of the main amplifier, and a predetermined frequency for the ET voltage distributed by the distribution unit
  • a reverse phase conversion unit for converting the component of the negative phase into a reverse phase, and the ET voltage converted by the reverse phase conversion unit is supplied to the amplifier at the previous stage.
  • the ET voltage output from the ET output section includes a component of the switching frequency
  • the ET voltage in which the component is in reverse phase is supplied to the amplifier at the front stage of the main amplifier, Generation of spurious at the output of the main amplifier can be suppressed. Therefore, even if the filter provided in the ET output unit is miniaturized, the generation of the spurious is suppressed, so that the miniaturization and cost reduction of the wireless device can be realized.
  • an AC coupling unit may be provided to AC couple the ET voltage converted by the negative phase conversion unit to the AC voltage.
  • the ET voltage after conversion by the negative phase conversion unit may be supplied to one or more of the plurality of amplifiers.
  • a second aspect of the present invention is a radio apparatus comprising: a main amplifier for amplifying a signal to be transmitted by radio; and an ET output unit for outputting an ET voltage corresponding to the envelope of the signal and supplying the ET voltage to the main amplifier.
  • the ET output unit is operated based on a switching waveform of a predetermined frequency, and includes an inverse waveform generation unit that generates an opposite phase waveform corresponding to a component of the predetermined frequency assumed to be included in the ET voltage. And a waveform generated by the reverse waveform generation unit is superimposed on the ET voltage.
  • the ET voltage output from the ET output section includes a component of the switching frequency
  • the waveform of the phase opposite to that is superimposed on the ET voltage to cancel the component of the switching waveform.
  • Generation of spurious at the output of the main amplifier can be suppressed. Therefore, even if the filter provided in the ET output unit is miniaturized, the generation of the spurious is suppressed, so that the miniaturization and cost reduction of the wireless device can be realized.
  • the present invention it is possible to miniaturize the filter of the ET output unit in the wireless device which amplifies the wireless output by the ET method.
  • the filters (223, 323, and 42) used in the amplifier power supply units according to the following first to third embodiments are miniaturized as compared with those of the conventional system.
  • the miniaturization of the filter is realized by miniaturizing the coil (L) and capacitor (C) which are components constituting the filter, and reducing and simplifying the number of these components. be able to.
  • FIG. 2 shows an example of the configuration of the amplifier power supply unit according to the first embodiment of the present invention.
  • the amplifier power supply unit of this example includes a DSP 201, an FPGA 202, an ET output unit 220 having a PWM unit 221, a class D amplifier 222, and a filter 223, and a DC power supply unit 211, PA) Power is supplied to 251.
  • the DSP 201 calculates an envelope from the IQ signal by so-called power calculation.
  • the FPGA 151 receives the calculation result of the envelope and sets it in the PWM unit 221.
  • the PWM unit 221 converts the calculation result of the envelope into an analog signal by the DAC, and generates a PWM signal for ET using a switching waveform of a predetermined frequency (for example, a triangular wave of 1 MHz).
  • the PWM signal output from the PWM unit 221 is amplified by the class D amplifier 222 based on the DC voltage from the DC power supply unit 211, is returned to the original analog waveform (envelope) by the filter 223, and is used as an ET voltage as the main amplifier 253. Supplied to
  • the main feature of the wireless output amplification unit according to the first embodiment is that the ET voltage output from the ET output unit is distributed to another amplifier preceding the main amplifier.
  • another amplifier preceding the main amplifier operates at a DC voltage in the same manner as the main amplifier.
  • two amplifiers (AMP) 252 and 253 are provided before the main amplifier 251, and a distribution unit 231 for distributing the ET voltage to the amplifier 253 among them is provided.
  • a reverse phase conversion unit 232 is provided in order to convert the component of the switching frequency to the reverse phase and supply it to the amplifier 253.
  • the reverse phase conversion unit 232 generates a reverse phase waveform by using a comparator for the signal distributed from the distributor 231. Then, since the reverse phase waveform generated by the reverse phase conversion unit 232 is supplied to the amplifier 253, the reverse phase component of the spurious component is amplified by the amplifier 253. Since the signal is amplified by the main amplifier 251 based on the ET voltage input from the divider 231, the generation of the spurious is suppressed by the amplification in the main amplifier 251.
  • the radio apparatus includes the main amplifier 251 for amplifying a signal to be transmitted wirelessly, and the ET output unit 220 for outputting the ET voltage for following the envelope of the signal and supplying the ET voltage to the main amplifier 251.
  • the ET output unit 220 operates based on a switching waveform of a predetermined frequency.
  • the radio apparatus according to the first embodiment further divides the component of the switching frequency into the reverse phase to the ET voltage distributed by the distributing unit 231 and the distributing unit 231 for distributing the ET voltage to the amplifier 253 at the front stage of the main amplifier 251.
  • a reverse phase conversion unit 232 which performs conversion, and supplies the ET voltage after conversion by the reverse phase conversion unit 232 to the amplifier 253 of the previous stage.
  • the switching frequency component remains in the ET voltage due to the miniaturization of the filter
  • the switching frequency component is reverse phase to be supplied to the preceding amplifier of the main amplifier, so amplification by the main amplifier
  • An input signal having a component that cancels out the generated spurious can be generated by the preceding amplifier and applied to the main amplifier.
  • the ET voltage includes a component of the switching frequency, as shown in FIG. 6B
  • the ET voltage is distributed to the amplifier 253 immediately before the main amplifier 251 among the two amplifiers 252 and 253 preceding the main amplifier 251.
  • the ET voltage may be distributed to the previous amplifier).
  • FIG. 3 shows a configuration example of an amplifier power supply unit according to a second embodiment of the present invention.
  • the amplifier to which the ET voltage is distributed operates in the same manner as the main amplifier at the DC voltage.
  • the amplifier to which the ET voltage is distributed operates at the AC voltage. The case will be described.
  • the main feature of the wireless output amplifier according to the second embodiment is that the ET voltage output from the ET output unit is AC coupled to an AC voltage for operating another amplifier preceding the main amplifier.
  • the ET voltage output from the ET output unit is AC coupled to an AC voltage for operating another amplifier preceding the main amplifier.
  • the distribution unit 231 is provided.
  • a reverse phase conversion unit 232 is provided for converting the component of the switching frequency into a reverse phase, and the ET voltage after conversion by the reverse phase conversion unit 232 is supplied to the amplifier 254.
  • An AC coupling 233 is provided which is AC coupled to the supply voltage.
  • the arrangement and the number of amplifiers to which the ET voltage is to be distributed are arbitrary, as long as an effect of removing or reducing the spurious can be obtained.
  • FIG. 4 shows an example of the configuration of an amplifier power supply unit according to a third embodiment of the present invention.
  • the main feature of the wireless output amplifier according to the third embodiment is to generate a waveform that cancels the component of the switching frequency in the ET voltage and to superimpose it on the ET voltage.
  • the reverse waveform generation unit 234 is provided which generates a waveform to be superimposed on the ET voltage.
  • the reverse waveform generation unit 234 generates a waveform in reverse phase corresponding to the component of the switching frequency assumed to be included in the ET voltage based on the control of the FPGA 202.
  • the waveform generated by the inverse waveform generation unit 234 is superimposed on the ET voltage output from the ET output unit 220.
  • the reverse waveform generation unit 234 is, for example, a DAC, and converts the signal input from the FPGA 202 into an analog signal to generate an analog signal of reverse phase waveform. Since the FPGA 202 controls the PWM unit 221, it can generate switching noise and its reverse phase voltage, which is input to the reverse waveform generator 234 to generate a waveform of the reverse phase.
  • the radio apparatus includes the main amplifier 251 for amplifying a signal to be wirelessly transmitted, and the ET output unit 220 for outputting the ET voltage for following the envelope of the signal and supplying the ET voltage to the main amplifier 251.
  • the ET output unit 220 operates based on a switching waveform of a predetermined frequency.
  • the radio apparatus according to the third embodiment further includes an inverse waveform generation unit 234 that generates an inverse phase waveform corresponding to the component of the switching frequency assumed to be included in the ET voltage, and the generation is performed by the inverse waveform generation unit 234 The waveform is superimposed on the ET voltage.
  • the third embodiment even if the ET voltage includes the component of the switching frequency, the component of the switching frequency can be removed or reduced from the ET voltage and supplied to the main amplifier, and the amplification result in the main amplifier It is possible to eliminate or reduce the spurious. Therefore, the generation of spurious can be suppressed even if the filter provided in the ET output unit is miniaturized, so that the miniaturization and cost reduction of the wireless device can be realized.
  • the third embodiment can also be applied in combination with the first embodiment (or the second embodiment). That is, the reverse waveform generation unit 234 of FIG. 4 may be added to the configuration of FIG. 2 (or FIG. 3).
  • the configuration of the system or apparatus according to the present invention is not necessarily limited to those described above, and various configurations may be used.
  • the present invention can be applied to the hardware architecture of the multi-band radio unit in software radio because it can cope with various frequencies by varying the Lo signal of the analog orthogonal unit due to the configuration of the radio.
  • it can be applied as a radio unit hardware architecture of white space (secondary use), which has recently been attracting attention.
  • the present invention can also be provided, for example, as a method or method for executing the processing according to the present invention.
  • the present invention can be used for various types of radios in which the voltage supplied to the main amplifier is controlled by the ET method.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

Problem: Proposed is an effective technique for making a filter of an ET output unit smaller in a wireless device for amplifying wireless output using an ET scheme. Solution: A wireless device, comprising: a primary amplifier 251 for amplifying wirelessly transmitted signals; and an ET output unit 220 for outputting an ET voltage that conforms to an envelope of said signals, and supplying the ET voltage to the primary amplifier 251. The ET output unit 220 operates on the basis of a switching waveform of a predetermined frequency. The wireless device further comprises: a distribution unit 231 for distributing the ET voltage to a first-stage amplifier 253 of the primary amplifier 251; and a reverse phase conversion unit 232 for converting the component of the switching frequency to reverse phase in the ET voltage distributed by the distribution unit 231, the ET voltage after conversion by the reverse phase conversion unit 232 being supplied to the first-stage amplifier 253.

Description

無線機及び無線出力増幅方法Radio and radio power amplification method
　本発明は、無線出力を増幅する主増幅器に供給する電圧をＥＴ方式により制御する技術に関する。 The present invention relates to a technique of controlling a voltage supplied to a main amplifier for amplifying a wireless output by an ET method.
　無線機のデジタル変調方式としては、直交変調がアナログ変調かデジタル変調かに大別できる。アナログ方式では、比較的安価に実現でき、カーテシアン等のベースバンドフィードバックの歪補償技術と親和性がよく、ダイレクトに所望の周波数に変換できるという利点がある。一方、振幅バランス、直交度、ＤＣを調整する必要があるという短所がある。デジタル方式では、デジタルで直交するため、振幅バランス、直交度、ＤＣは調整不要という利点がある。一方で、高速なＤＡＣ（Digital Analog Converter）が必要でコスト高になることから、デジタル方式においてダイレクトコンバージョンの採用は難しい。 As a digital modulation system of a radio, quadrature modulation can be roughly classified into analog modulation or digital modulation. The analog method can be realized at relatively low cost, has an affinity for distortion compensation technology of baseband feedback such as Cartesian, and has an advantage that it can be directly converted to a desired frequency. On the other hand, there is a disadvantage that it is necessary to adjust the amplitude balance, the degree of orthogonality, and the DC. In the digital system, since they are digital and orthogonal, there is an advantage that adjustment of amplitude balance, orthogonality and DC is unnecessary. On the other hand, it is difficult to adopt direct conversion in a digital system because a high-speed DAC (Digital Analog Converter) is required and the cost is high.
　一般に、狭帯域無線では、高効率・低歪・安価で増幅する技術、つまりカーテシアンを用いることができることから、アナログ方式の直交変調を採用することが多い。更に近年では、無線機の小型化、低消費化のために、増幅部において高効率動作を実現する観点から、ＥＴ（Envelope Tracking）方式の電力増幅部を用いた無線技術が利用されるようになっている（例えば、特許文献１参照）。 In general, in narrow band radio, since it is possible to use a high efficiency, low distortion, low cost amplification technique, that is, Cartesian, analog quadrature modulation is often employed. Furthermore, in recent years, in order to realize high efficiency operation in the amplification unit for downsizing and low power consumption of the radio, radio technology using a power amplification unit of ET (Envelope Tracking) method is used. (See, for example, Patent Document 1).
国際公開第２０１５／０４１０６７号International Publication No. 2015/041067
　図１には、従来方式の無線機における無線部及び増幅器電力供給部の概略構成を示してある。
　増幅器電力供給部は、ＤＣ電源部１３０と、ＥＴ出力部１４０と、制御部１５０とを備え、無線部を構成する主増幅器１１０に電力を供給する。無線部は、制御部１５０と、ＤＡＣ１２１，１２２、アナログ直交変調部１２３と、主増幅器（ＰＡ：Power Amplifier）１１０とを備えて構成されている。ここで、制御部１５０は、電力供給部の一部として機能するとともに無線部の一部として機能する。 FIG. 1 shows a schematic configuration of a radio unit and an amplifier power supply unit in a conventional radio.
The amplifier power supply unit includes a DC power supply unit 130, an ET output unit 140, and a control unit 150, and supplies power to the main amplifier 110 constituting the wireless unit. The wireless unit includes a control unit 150, DACs 121 and 122, an analog quadrature modulation unit 123, and a main amplifier (PA: Power Amplifier) 110. Here, the control unit 150 functions as a part of the power supply unit and as a part of the wireless unit.
　制御部１５０は、ＦＰＧＡ（Field Programmable Gate Array）１５１と、ＤＳＰ（Digital Signal Processor）１５２とを備えて構成されており、ＩＱ信号を取得する。制御部１５０は、無線部の一部として機能する場合は、Ｉ信号及びＱ信号のそれぞれをＤＡＣ１２１，１２２に出力する。また、制御部１５０は、増幅器電力供給部の一部として機能する場合は、ＥＴ出力部１４０を制御することで、主増幅器１１０への供給電圧を制御する。例えば、制御部１５０は、いわゆるパワー演算によりＩＱ信号からエンベロープを算出し、算出結果をＥＴ出力部１４０に出力する。 The control unit 150 includes an FPGA (Field Programmable Gate Array) 151 and a DSP (Digital Signal Processor) 152, and acquires an IQ signal. When the control unit 150 functions as part of the wireless unit, the control unit 150 outputs the I signal and the Q signal to the DACs 121 and 122, respectively. Further, when functioning as part of the amplifier power supply unit, the control unit 150 controls the ET output unit 140 to control the supply voltage to the main amplifier 110. For example, the control unit 150 calculates an envelope from the IQ signal by so-called power calculation, and outputs the calculation result to the ET output unit 140.
　ＤＡＣ１２１，１２２は、Ｉ信号及びＱ信号をアナログ変換してアナログ直交変調部１２３に出力する。アナログ直交変調部１２３で変調された信号は、主増幅器１１０で増幅され、アンテナから送信される。また、主増幅器１１０の出力は、アナログ直交変調部１２３に帰還し、所定のカーテシアンフィードバックが構成される。なお、アナログ直交変調部１２３のＬｏ信号を可変とすることで、各種の周波数に対応可能となっている。 The DACs 121 and 122 perform analog conversion on the I signal and the Q signal, and output the analog signal to the analog quadrature modulator 123. The signal modulated by the analog quadrature modulator 123 is amplified by the main amplifier 110 and transmitted from the antenna. Also, the output of the main amplifier 110 is fed back to the analog quadrature modulator 123 to form a predetermined cartesian feedback. In addition, by making the Lo signal of the analog quadrature modulation unit 123 variable, it is possible to cope with various frequencies.
　ＥＴ出力部１４０は、ＰＷＭ（Pulse Width Modulation）部１４１と、Ｄ級アンプ１４５と、フィルタ１４６とを備える。ＰＷＭ部１４１は、ＤＡＣ１４２と、三角波発生回路１４３と、コンパレータ１４４とを備える。ＤＡＣ１４２は、制御部１５０から取得したエンベロープの算出結果をアナログ信号に変換し、コンパレータ１４４に出力する。コンパレータ１４４は、ＤＡＣ１４２から出力されるエンベロープのアナログ波形と、三角波発生回路１４３が出力する三角波（スイッチング波形）とから、ＥＴ用のＰＷＭ信号を生成する。ＥＴ用のＰＷＭ信号は、ＤＣ電源部１３０からのＤＣ電圧に基づいてＤ級アンプ１４５で増幅され、フィルタ１４６で元のアナログ波形（エンベロープ）に戻され、ＥＴ電圧として主増幅器１１０に供給される。 The ET output unit 140 includes a PWM (Pulse Width Modulation) unit 141, a class D amplifier 145, and a filter 146. The PWM unit 141 includes a DAC 142, a triangular wave generation circuit 143, and a comparator 144. The DAC 142 converts the calculation result of the envelope acquired from the control unit 150 into an analog signal, and outputs the analog signal to the comparator 144. The comparator 144 generates a PWM signal for ET from the analog waveform of the envelope output from the DAC 142 and the triangular wave (switching waveform) output from the triangular wave generation circuit 143. The PWM signal for ET is amplified by the class D amplifier 145 based on the DC voltage from the DC power supply unit 130, returned to the original analog waveform (envelope) by the filter 146, and supplied to the main amplifier 110 as the ET voltage. .
　上記のように、ＥＴ出力部におけるＤ級アンプの後段には、ＰＷＭ信号を元のアナログ波形（エンベロープ）に戻すためにフィルタが必要となる。しかしながら、ＥＴ電圧は、増幅における最終段の主増幅器に使用することが多いため、フィルタの特性によってはスイッチング周波数がそのまま増幅素子に重畳され、増幅結果にスプリアス（図６Ａ参照）として現れるという問題がある。スプリアスを防ぐには、ＥＴ電圧からスイッチング周波数の成分を除去できるようにフィルタに急峻な特性を持たせることが必要となり、結果的にフィルタが大型化し、無線機の小型化・低コスト化を妨げる結果となる。 As described above, a filter is required at the stage subsequent to the class D amplifier in the ET output unit in order to return the PWM signal to the original analog waveform (envelope). However, since ET voltage is often used for the main amplifier of the final stage in amplification, the switching frequency is superimposed on the amplification element as it is depending on the characteristics of the filter, and there is a problem that spurious results appear as amplification results (see FIG. 6A). is there. In order to prevent spurious, it is necessary to make the filter have a steep characteristic so that the switching frequency component can be removed from the ET voltage, and as a result, the filter becomes large, which hinders downsizing and cost reduction of the radio. It results.
　本発明は、上記のような従来の事情に鑑みて為されたものであり、ＥＴ方式により無線出力を増幅する無線機におけるＥＴ出力部のフィルタを小型化するのに有効な技術を提案することを目的とする。 The present invention has been made in view of the above-described conventional circumstances, and proposes an effective technique for miniaturizing a filter of an ET output unit in a wireless device that amplifies a wireless output by the ET method. With the goal.
　上記の目的を達成するために、本発明では、無線機を以下のように構成した。
　すなわち、本発明の第１の側面は、無線送信する信号を増幅する主増幅器と、当該信号のエンベロープに追従するＥＴ電圧を出力して主増幅器に供給するＥＴ出力部とを備えた無線機であって、ＥＴ出力部は、所定周波数のスイッチング波形に基づいて動作しており、ＥＴ電圧を主増幅器の前段の増幅器に分配するための分配部と、分配部で分配されたＥＴ電圧に所定周波数の成分を逆相にする変換を施す逆相変換部とを備え、逆相変換部による変換後のＥＴ電圧を前段の増幅器に供給することを特徴とする。 In order to achieve the above object, in the present invention, the radio is configured as follows.
That is, a first aspect of the present invention is a radio apparatus comprising: a main amplifier for amplifying a signal to be transmitted by radio; and an ET output unit for outputting an ET voltage following the envelope of the signal and supplying the ET voltage to the main amplifier. The ET output unit operates based on a switching waveform of a predetermined frequency, and a distribution unit for distributing the ET voltage to the amplifier at the front stage of the main amplifier, and a predetermined frequency for the ET voltage distributed by the distribution unit And a reverse phase conversion unit for converting the component of the negative phase into a reverse phase, and the ET voltage converted by the reverse phase conversion unit is supplied to the amplifier at the previous stage.
　このような構成によれば、ＥＴ出力部から出力されるＥＴ電圧にスイッチング周波数の成分が含まれる場合でも、その成分を逆相にしたＥＴ電圧を主増幅器の前段の増幅器に供給することで、主増幅器の出力におけるスプリアスの発生を抑制するすることができる。従って、ＥＴ出力部に設けるフィルタを小型化してもスプリアスの発生が抑制されるので、無線機の小型化・低コスト化を実現することが可能となる。 According to such a configuration, even when the ET voltage output from the ET output section includes a component of the switching frequency, the ET voltage in which the component is in reverse phase is supplied to the amplifier at the front stage of the main amplifier, Generation of spurious at the output of the main amplifier can be suppressed. Therefore, even if the filter provided in the ET output unit is miniaturized, the generation of the spurious is suppressed, so that the miniaturization and cost reduction of the wireless device can be realized.
　ここで、前段の増幅器がＡＣ電圧で動作する構成の場合には、逆相変換部による変換後のＥＴ電圧をＡＣ電圧にＡＣ結合するＡＣ結合部を設ければよい。また、増幅器の前段に複数の増幅器を有する場合には、逆相変換部による変換後のＥＴ電圧を複数の増幅器の１以上に供給すればよい。 Here, in the case of the configuration in which the previous stage amplifier operates with an AC voltage, an AC coupling unit may be provided to AC couple the ET voltage converted by the negative phase conversion unit to the AC voltage. When a plurality of amplifiers are provided in front of the amplifiers, the ET voltage after conversion by the negative phase conversion unit may be supplied to one or more of the plurality of amplifiers.
　本発明の第２の側面は、無線送信する信号を増幅する主増幅器と、当該信号のエンベロープに追従対応するＥＴ電圧を出力して主増幅器に供給するＥＴ出力部とを備えた無線機であって、ＥＴ出力部は、所定周波数のスイッチング波形に基づいて動作しており、ＥＴ電圧に含まれることが想定される所定周波数の成分に対応する逆位相の波形を発生させる逆波形発生部を備え、逆波形発生部で発生された波形をＥＴ電圧に重畳することを特徴とする。 A second aspect of the present invention is a radio apparatus comprising: a main amplifier for amplifying a signal to be transmitted by radio; and an ET output unit for outputting an ET voltage corresponding to the envelope of the signal and supplying the ET voltage to the main amplifier. The ET output unit is operated based on a switching waveform of a predetermined frequency, and includes an inverse waveform generation unit that generates an opposite phase waveform corresponding to a component of the predetermined frequency assumed to be included in the ET voltage. And a waveform generated by the reverse waveform generation unit is superimposed on the ET voltage.
　このような構成によれば、ＥＴ出力部から出力されるＥＴ電圧にスイッチング周波数の成分が含まれる場合でも、それとは逆位相の波形をＥＴ電圧に重畳してスイッチング波形の成分を相殺させることで、主増幅器の出力におけるスプリアスの発生を抑制するすることができる。従って、ＥＴ出力部に設けるフィルタを小型化してもスプリアスの発生が抑制されるので、無線機の小型化・低コスト化を実現することが可能となる。 According to such a configuration, even when the ET voltage output from the ET output section includes a component of the switching frequency, the waveform of the phase opposite to that is superimposed on the ET voltage to cancel the component of the switching waveform. , Generation of spurious at the output of the main amplifier can be suppressed. Therefore, even if the filter provided in the ET output unit is miniaturized, the generation of the spurious is suppressed, so that the miniaturization and cost reduction of the wireless device can be realized.
　本発明によれば、ＥＴ方式により無線出力を増幅する無線機におけるＥＴ出力部のフィルタを小型化することが可能となる。 According to the present invention, it is possible to miniaturize the filter of the ET output unit in the wireless device which amplifies the wireless output by the ET method.
従来方式の無線機における無線部及び増幅器電力供給部の概略構成を示す図である。It is a figure which shows schematic structure of the radio | wireless part and amplifier power supply part in the radio | wireless machine of a conventional system. 本発明の第１実施例に係る増幅器電力供給部の構成例を示す図である。It is a figure which shows the structural example of the amplifier power supply part which concerns on 1st Example of this invention. 本発明の第２実施例に係る増幅器電力供給部の構成例を示す図である。It is a figure which shows the structural example of the amplifier power supply part which concerns on 2nd Example of this invention. 本発明の第３実施例に係る増幅器電力供給部の構成例を示す図である。It is a figure which shows the structural example of the amplifier power supply part which concerns on 3rd Example of this invention. フィルタの小型化について説明する図である。It is a figure explaining size reduction of a filter. 従来方式による無線出力の増幅結果について説明する図である。It is a figure explaining the amplification result of the wireless output by a conventional system. 本発明方式による無線出力の増幅結果について説明する図である。It is a figure explaining the amplification result of the radio | wireless output by this invention system.
　本発明の一実施形態について、図面を参照して説明する。なお、以下では、主に、従来方式と相違する部分に着目して説明する。また、以下の第１～第３実施例に係る増幅器電力供給部で用いる各フィルタ（２２３，３２３，４２３）は、従来方式のものに比べて小型化してある。フィルタの小型化は、例えば図５に示すように、フィルタを構成する部品であるコイル（Ｌ）やコンデンサ（Ｃ）の小型化や、これら部品の数を減らして簡素化することで、実現することができる。 One embodiment of the present invention will be described with reference to the drawings. The following description will focus mainly on the differences from the conventional method. Also, the filters (223, 323, and 42) used in the amplifier power supply units according to the following first to third embodiments are miniaturized as compared with those of the conventional system. For example, as shown in FIG. 5, the miniaturization of the filter is realized by miniaturizing the coil (L) and capacitor (C) which are components constituting the filter, and reducing and simplifying the number of these components. be able to.
（第１実施例）
　図２には、本発明の第１実施例に係る増幅器電力供給部の構成例を示してある。本例の増幅器電力供給部は、ＤＳＰ２０１と、ＦＰＧＡ２０２と、ＰＷＭ部２２１及びＤ級アンプ２２２及びフィルタ２２３を有するＥＴ出力部２２０と、ＤＣ電源部２１１とを備え、無線部を構成する主増幅器（ＰＡ）２５１に電力を供給する。 (First embodiment)
FIG. 2 shows an example of the configuration of the amplifier power supply unit according to the first embodiment of the present invention. The amplifier power supply unit of this example includes a DSP 201, an FPGA 202, an ET output unit 220 having a PWM unit 221, a class D amplifier 222, and a filter 223, and a DC power supply unit 211, PA) Power is supplied to 251.
　ＤＳＰ２０１は、いわゆるパワー演算によりＩＱ信号からエンベロープを算出する。ＦＰＧＡ１５１は、エンベロープの算出結果を受けて、ＰＷＭ部２２１に設定する。ＰＷＭ部２２１は、エンベロープの算出結果をＤＡＣによりアナログ信号に変換し、所定周波数のスイッチング波形（例えば、１ＭＨｚの三角波）を用いてＥＴ用のＰＷＭ信号を生成する。ＰＷＭ部２２１から出力されるＰＷＭ信号は、ＤＣ電源部２１１からのＤＣ電圧に基づいてＤ級アンプ２２２で増幅され、フィルタ２２３で元のアナログ波形（エンベロープ）に戻され、ＥＴ電圧として主増幅器２５３に供給される。 The DSP 201 calculates an envelope from the IQ signal by so-called power calculation. The FPGA 151 receives the calculation result of the envelope and sets it in the PWM unit 221. The PWM unit 221 converts the calculation result of the envelope into an analog signal by the DAC, and generates a PWM signal for ET using a switching waveform of a predetermined frequency (for example, a triangular wave of 1 MHz). The PWM signal output from the PWM unit 221 is amplified by the class D amplifier 222 based on the DC voltage from the DC power supply unit 211, is returned to the original analog waveform (envelope) by the filter 223, and is used as an ET voltage as the main amplifier 253. Supplied to
　第１実施例に係る無線出力増幅部の主な特徴は、ＥＴ出力部から出力されるＥＴ電圧を、主増幅器の前段にある別の増幅器にも分配することである。なお、第１実施例では、主増幅器の前段にある別の増幅器が、主増幅器と同様にＤＣ電圧で動作することを前提としている。図２の例では、主増幅器２５１の前段に２つの増幅器（ＡＭＰ）２５２，２５３があり、そのうちの増幅器２５３に対してＥＴ電圧を分配するための分配部２３１を備えている。また、ＥＴ電圧をそのまま増幅器２５３に供給するのではなく、スイッチング周波数の成分を逆相に変換して増幅器２５３に供給するために逆相変換部２３２を設けてある。 The main feature of the wireless output amplification unit according to the first embodiment is that the ET voltage output from the ET output unit is distributed to another amplifier preceding the main amplifier. In the first embodiment, it is assumed that another amplifier preceding the main amplifier operates at a DC voltage in the same manner as the main amplifier. In the example of FIG. 2, two amplifiers (AMP) 252 and 253 are provided before the main amplifier 251, and a distribution unit 231 for distributing the ET voltage to the amplifier 253 among them is provided. Further, instead of supplying the ET voltage to the amplifier 253 as it is, a reverse phase conversion unit 232 is provided in order to convert the component of the switching frequency to the reverse phase and supply it to the amplifier 253.
　逆相変換部２３２は、分配器２３１から分配された信号をコンパレータを用いて逆相波形を生成する。そして、逆相変換部２３２で生成された逆相波形が増幅器２５３に供給されるので、スプリアス成分の逆相成分が増幅器２５３で増幅される。その信号を主増幅器２５１が分配器２３１から入力されたＥＴ電圧に基づいて増幅するので、主増幅器２５１での増幅によってスプリアスの発生が抑止される。 The reverse phase conversion unit 232 generates a reverse phase waveform by using a comparator for the signal distributed from the distributor 231. Then, since the reverse phase waveform generated by the reverse phase conversion unit 232 is supplied to the amplifier 253, the reverse phase component of the spurious component is amplified by the amplifier 253. Since the signal is amplified by the main amplifier 251 based on the ET voltage input from the divider 231, the generation of the spurious is suppressed by the amplification in the main amplifier 251.
　このように、第１実施例に係る無線機は、無線送信する信号を増幅する主増幅器２５１と、当該信号のエンベロープに追従するＥＴ電圧を出力して主増幅器２５１に供給するＥＴ出力部２２０とを備え、ＥＴ出力部２２０は、所定周波数のスイッチング波形に基づいて動作している。第１実施例に係る無線機は更に、ＥＴ電圧を主増幅器２５１の前段の増幅器２５３に分配するための分配部２３１と、分配部２３１で分配されたＥＴ電圧にスイッチング周波数の成分を逆相にする変換を施す逆相変換部２３２とを備え、逆相変換部２３２による変換後のＥＴ電圧を前段の増幅器２５３に供給する構成となっている。 As described above, the radio apparatus according to the first embodiment includes the main amplifier 251 for amplifying a signal to be transmitted wirelessly, and the ET output unit 220 for outputting the ET voltage for following the envelope of the signal and supplying the ET voltage to the main amplifier 251. , And the ET output unit 220 operates based on a switching waveform of a predetermined frequency. The radio apparatus according to the first embodiment further divides the component of the switching frequency into the reverse phase to the ET voltage distributed by the distributing unit 231 and the distributing unit 231 for distributing the ET voltage to the amplifier 253 at the front stage of the main amplifier 251. And a reverse phase conversion unit 232 which performs conversion, and supplies the ET voltage after conversion by the reverse phase conversion unit 232 to the amplifier 253 of the previous stage.
　第１実施例では、フィルタを小型化したことでＥＴ電圧にスイッチング周波数の成分が残るが、スイッチング周波数の成分を逆相にして主増幅器の前段の増幅器に供給するので、主増幅器での増幅によって発生するスプリアスを打ち消すような成分を持つ入力信号を前段の増幅器で発生させて主増幅器に与えることができる。これにより、ＥＴ電圧にスイッチング周波数の成分が含まれていても、図６Ｂに示すように、主増幅器での増幅結果からスプリアスを除去又は低減することが可能となる。従って、ＥＴ出力部に設けるフィルタを小型化してもスプリアスの発生を抑制することができるので、無線機の小型化・低コスト化を実現できる。 In the first embodiment, although the switching frequency component remains in the ET voltage due to the miniaturization of the filter, the switching frequency component is reverse phase to be supplied to the preceding amplifier of the main amplifier, so amplification by the main amplifier An input signal having a component that cancels out the generated spurious can be generated by the preceding amplifier and applied to the main amplifier. As a result, even if the ET voltage includes a component of the switching frequency, as shown in FIG. 6B, it is possible to remove or reduce the spurious from the amplification result in the main amplifier. Therefore, the generation of spurious can be suppressed even if the filter provided in the ET output unit is miniaturized, so that the miniaturization and cost reduction of the wireless device can be realized.
　なお、図２の例では、主増幅器２５１の前段にある２つの増幅器２５２，２５３のうち、主増幅器２５１の直前の増幅器２５３にＥＴ電圧を分配しているが、その前の増幅器２５２（或いは更に前の増幅器）にＥＴ電圧を分配してもよい。また、ＥＴ電圧を分配する増幅器は複数であってもよく、スプリアスを効果的に除去又は低減できるように分配比率などを調整すればよい。 In the example shown in FIG. 2, the ET voltage is distributed to the amplifier 253 immediately before the main amplifier 251 among the two amplifiers 252 and 253 preceding the main amplifier 251. The ET voltage may be distributed to the previous amplifier). Also, there may be a plurality of amplifiers for distributing the ET voltage, and the distribution ratio may be adjusted so that the spurious can be effectively eliminated or reduced.
（第２実施例）
　図３には、本発明の第２実施例に係る増幅器電力供給部の構成例を示してある。
　第１実施例では、ＥＴ電圧の分配先となる増幅器が主増幅器と同様にＤＣ電圧で動作する場合について説明したが、第２実施例では、ＥＴ電圧の分配先となる増幅器がＡＣ電圧で動作する場合について説明する。 Second Embodiment
FIG. 3 shows a configuration example of an amplifier power supply unit according to a second embodiment of the present invention.
In the first embodiment, the amplifier to which the ET voltage is distributed operates in the same manner as the main amplifier at the DC voltage. In the second embodiment, the amplifier to which the ET voltage is distributed operates at the AC voltage. The case will be described.
　第２実施例に係る無線出力増幅部の主な特徴は、ＥＴ出力部から出力されるＥＴ電圧を、主増幅器の前段にある別の増幅器を動作させるＡＣ電圧にＡＣ結合することである。図３の例では、主増幅器２５１の前段に、ＡＣ電源部２４１から供給されるＡＣ電圧で動作する２つの増幅器（ＡＭＰ）２５４，２５５があり、そのうちの増幅器２５４に対してＥＴ電圧を分配するための分配部２３１を備えている。また、ＥＴ電圧をそのまま増幅器２５４に供給するのではなく、スイッチング周波数の成分を逆相に変換する逆相変換部２３２を設けると共に、逆相変換部２３２による変換後のＥＴ電圧を増幅器２５４への供給電圧にＡＣ結合するＡＣ結合部２３３を設けてある。 The main feature of the wireless output amplifier according to the second embodiment is that the ET voltage output from the ET output unit is AC coupled to an AC voltage for operating another amplifier preceding the main amplifier. In the example of FIG. 3, there are two amplifiers (AMPs) 254 and 255 operating with the AC voltage supplied from the AC power supply unit 241 before the main amplifier 251, and the ET voltage is distributed to the amplifiers 254 among them. The distribution unit 231 is provided. Further, instead of supplying the ET voltage to the amplifier 254 as it is, a reverse phase conversion unit 232 is provided for converting the component of the switching frequency into a reverse phase, and the ET voltage after conversion by the reverse phase conversion unit 232 is supplied to the amplifier 254. An AC coupling 233 is provided which is AC coupled to the supply voltage.
　これにより、主増幅器とは異なってＡＣ電圧で動作する増幅器に対しても、主増幅器に供給するＥＴ電圧を分配して、主増幅器での増幅結果からスプリアスを除去又は低減することが可能となる。従って、ＥＴ出力部に設けるフィルタを小型化してもスプリアスの発生を抑制することができるので、無線機の小型化・低コスト化を実現できる。なお、第１実施例と同様に、ＥＴ電圧の分配先となる増幅器の配置及び個数は任意であり、スプリアスを除去又は低減する効果が得られればよい。 This makes it possible to distribute the ET voltage supplied to the main amplifier even to an amplifier operating at an AC voltage unlike the main amplifier, and to eliminate or reduce the spurious from the amplification result of the main amplifier. . Therefore, the generation of spurious can be suppressed even if the filter provided in the ET output unit is miniaturized, so that the miniaturization and cost reduction of the wireless device can be realized. As in the first embodiment, the arrangement and the number of amplifiers to which the ET voltage is to be distributed are arbitrary, as long as an effect of removing or reducing the spurious can be obtained.
（第３実施例）
　図４には、本発明の第３実施例に係る増幅器電力供給部の構成例を示してある。
　第３実施例に係る無線出力増幅部の主な特徴は、ＥＴ電圧中のスイッチング周波数の成分を打ち消すような波形を発生させてＥＴ電圧に重畳することである。図４の例では、ＥＴ電圧に重畳させる波形を発生させる逆波形発生部２３４を設けてある。逆波形発生部２３４は、ＦＰＧＡ２０２の制御に基づいて、ＥＴ電圧に含まれることが想定されるスイッチング周波数の成分に対応する逆位相の波形を発生させる。逆波形発生部２３４で発生された波形は、ＥＴ出力部２２０から出力されるＥＴ電圧に重畳される。 Third Embodiment
FIG. 4 shows an example of the configuration of an amplifier power supply unit according to a third embodiment of the present invention.
The main feature of the wireless output amplifier according to the third embodiment is to generate a waveform that cancels the component of the switching frequency in the ET voltage and to superimpose it on the ET voltage. In the example of FIG. 4, the reverse waveform generation unit 234 is provided which generates a waveform to be superimposed on the ET voltage. The reverse waveform generation unit 234 generates a waveform in reverse phase corresponding to the component of the switching frequency assumed to be included in the ET voltage based on the control of the FPGA 202. The waveform generated by the inverse waveform generation unit 234 is superimposed on the ET voltage output from the ET output unit 220.
　逆波形発生部２３４は、例えばＤＡＣであり、ＦＰＧＡ２０２から入力された信号をアナログ信号に変換することで逆位相波形のアナログ信号を生成する。ＦＰＧＡ２０２はＰＷＭ部２２１の制御を行うため、スイッチングノイズおよびその逆相電圧の生成を行うことができ、これを逆波形発生器２３４に入力して逆位相の波形を発生させる。 The reverse waveform generation unit 234 is, for example, a DAC, and converts the signal input from the FPGA 202 into an analog signal to generate an analog signal of reverse phase waveform. Since the FPGA 202 controls the PWM unit 221, it can generate switching noise and its reverse phase voltage, which is input to the reverse waveform generator 234 to generate a waveform of the reverse phase.
　このように、第３実施例に係る無線機は、無線送信する信号を増幅する主増幅器２５１と、当該信号のエンベロープに追従するＥＴ電圧を出力して主増幅器２５１に供給するＥＴ出力部２２０とを備え、ＥＴ出力部２２０は、所定周波数のスイッチング波形に基づいて動作している。第３実施例に係る無線機は更に、ＥＴ電圧に含まれることが想定されるスイッチング周波数の成分に対応する逆位相の波形を発生させる逆波形発生部２３４を備え、逆波形発生部２３４で発生された波形をＥＴ電圧に重畳する構成となっている。 As described above, the radio apparatus according to the third embodiment includes the main amplifier 251 for amplifying a signal to be wirelessly transmitted, and the ET output unit 220 for outputting the ET voltage for following the envelope of the signal and supplying the ET voltage to the main amplifier 251. , And the ET output unit 220 operates based on a switching waveform of a predetermined frequency. The radio apparatus according to the third embodiment further includes an inverse waveform generation unit 234 that generates an inverse phase waveform corresponding to the component of the switching frequency assumed to be included in the ET voltage, and the generation is performed by the inverse waveform generation unit 234 The waveform is superimposed on the ET voltage.
　第３実施例によれば、ＥＴ電圧にスイッチング周波数の成分が含まれていても、ＥＴ電圧からスイッチング周波数の成分を除去又は低減させて主増幅器に供給することができ、主増幅器での増幅結果からスプリアスを除去又は低減することが可能となる。従って、ＥＴ出力部に設けるフィルタを小型化してもスプリアスの発生を抑制することができるので、無線機の小型化・低コスト化を実現できる。
　なお、第３実施例は、第１実施例（又は第２実施例）と組み合わせて適用することもできる。すなわち、図２（又は図３）の構成に、図４の逆波形発生部２３４を追加してもよい。 According to the third embodiment, even if the ET voltage includes the component of the switching frequency, the component of the switching frequency can be removed or reduced from the ET voltage and supplied to the main amplifier, and the amplification result in the main amplifier It is possible to eliminate or reduce the spurious. Therefore, the generation of spurious can be suppressed even if the filter provided in the ET output unit is miniaturized, so that the miniaturization and cost reduction of the wireless device can be realized.
The third embodiment can also be applied in combination with the first embodiment (or the second embodiment). That is, the reverse waveform generation unit 234 of FIG. 4 may be added to the configuration of FIG. 2 (or FIG. 3).
　ここで、本発明に係るシステムや装置などの構成としては、必ずしも以上に示したものに限られず、種々な構成が用いられてもよい。例えば、本発明は、無線機の構成上、アナログ直交部のＬｏ信号を可変させることで各種の周波数に対応できることから、ソフトウェアラジオ化におけるマルチバンド無線部のハードアーキテクチャに適用することができる。更に、近年注目されているホワイトスペース（２次利用）の無線部ハードアーキテクチャとしても適用できる。
　また、本発明は、例えば、本発明に係る処理を実行する方法や方式などとして提供することも可能である。 Here, the configuration of the system or apparatus according to the present invention is not necessarily limited to those described above, and various configurations may be used. For example, the present invention can be applied to the hardware architecture of the multi-band radio unit in software radio because it can cope with various frequencies by varying the Lo signal of the analog orthogonal unit due to the configuration of the radio. Furthermore, it can be applied as a radio unit hardware architecture of white space (secondary use), which has recently been attracting attention.
Furthermore, the present invention can also be provided, for example, as a method or method for executing the processing according to the present invention.
　この出願は、２０１７年８月４日に出願された日本出願特願２０１７－１５１１８６を基礎として優先権の利益を主張するものであり、その開示の全てを引用によってここに取り込む。 This application claims the benefit of priority based on Japanese Patent Application No. 2017-151186 filed on Aug. 4, 2017, the entire disclosure of which is incorporated herein by reference.
　本発明は、主増幅器に供給する電圧をＥＴ方式により制御する種々の形式の無線機に利用することができる。 The present invention can be used for various types of radios in which the voltage supplied to the main amplifier is controlled by the ET method.
　１１０：主増幅器、　１２１，１２２：ＤＡＣ、　１２３：アナログ直交変調部、　１３０：ＤＣ電源部、　１４０：ＥＴ出力部、　１４１：ＰＷＭ分、　１４２：ＤＡＣ、　１４３：三角波発生回路、　１４４：コンパレータ、　１４５：Ｄ級ＡＭＰ、　１４６：フィルタ、　１５０：制御部、　１５１：ＦＰＧＡ、　１５２：ＤＳＰ、　２０１：ＤＳＰ、　２０２：ＦＰＧＡ、　２１１：ＤＣ電源部、　２２０：ＥＴ出力部、　２２１：ＰＷＭ部、　２２２：Ｄ級ＡＭＰ、　２２３：フィルタ、　２３１：分配部、　２３２：逆相変換部、　２３３：ＡＣ結合部、　２３４：逆波形発生部、　２４１：ＡＣ電源部、　２５１：主増幅器、　２５２，２５３：増幅器 110: main amplifier 121, 122: DAC, 123: analog quadrature modulator, 130: DC power source, 140: ET output, 141: PWM, 142: DAC, 143: triangular wave generator, 144: comparator, 145 : Class D AMP, 146: filter, 150: control unit, 151: FPGA, 152: DSP, 201: DSP, 202: FPGA, 211: DC power supply unit, 220: ET output unit, 221: PWM unit, 222: D Class AMP, 223: filter, 231: distribution unit, 232: reverse phase conversion unit, 233: AC coupling unit, 234: reverse waveform generation unit, 241: AC power supply unit, 251: main amplifier, 252, 253: amplifier

Claims (6)

  1. 　無線送信する信号を増幅する主増幅器と、前記信号のエンベロープに追従するＥＴ電圧を出力して前記主増幅器に供給するＥＴ出力部とを備えた無線機であって、
    　前記ＥＴ出力部は、所定周波数のスイッチング波形に基づいて動作しており、
    　前記ＥＴ電圧を前記主増幅器の前段の増幅器に分配するための分配部と、
    　前記分配部で分配された前記ＥＴ電圧に前記所定周波数の成分を逆相にする変換を施す逆相変換部とを備え、
    　前記逆相変換部による変換後の前記ＥＴ電圧を前記前段の増幅器に供給することを特徴とする無線機。     A wireless device comprising: a main amplifier for amplifying a signal to be transmitted wirelessly; and an ET output unit for outputting an ET voltage that follows the envelope of the signal and supplying the ET voltage to the main amplifier,
    The ET output unit operates based on a switching waveform of a predetermined frequency,
    A distribution unit for distributing the ET voltage to an amplifier preceding the main amplifier;
    A reverse phase conversion unit for converting the ET voltage distributed by the distribution unit into a reverse phase of the component of the predetermined frequency;
    A wireless device characterized in that the ET voltage after conversion by the negative phase conversion unit is supplied to an amplifier of the previous stage.
  2. 　請求項１に記載の無線機において、
    　前記前段の増幅器はＡＣ電圧で動作しており、
    　前記逆相変換部による変換後のＥＴ電圧を前記ＡＣ電圧にＡＣ結合するＡＣ結合部を備えたことを特徴とする無線機。     In the wireless device according to claim 1,
    The preceding amplifier is operating at AC voltage,
    A wireless device comprising: an AC coupling unit for AC coupling the ET voltage after conversion by the reverse phase conversion unit to the AC voltage.
  3. 　請求項１に記載の無線機において、
    　前記主増幅器の前段に複数の増幅器を有し、
    　前記逆相変換部による変換後のＥＴ電圧を前記複数の増幅器の１以上に供給することを特徴とする無線機。     In the wireless device according to claim 1,
    Having a plurality of amplifiers in front of the main amplifier;
    A wireless device characterized in that the ET voltage converted by the reverse phase conversion unit is supplied to one or more of the plurality of amplifiers.
  4. 　請求項２に記載の無線機において、
    　前記主増幅器の前段に複数の増幅器を有し、
    　前記逆相変換部による変換後のＥＴ電圧を前記複数の増幅器の１以上に供給することを特徴とする無線機。     In the wireless device according to claim 2,
    Having a plurality of amplifiers in front of the main amplifier;
    A wireless device characterized in that the ET voltage converted by the reverse phase conversion unit is supplied to one or more of the plurality of amplifiers.
  5. 　無線送信する信号を増幅する主増幅器と、前記信号のエンベロープに追従するＥＴ電圧を出力して前記主増幅器に供給するＥＴ出力部とを備えた無線機であって、
    　前記ＥＴ出力部は、所定周波数のスイッチング波形に基づいて動作しており、
    　前記ＥＴ電圧に含まれることが想定される前記所定周波数の成分に対応する逆位相の波形を発生させる逆波形発生部を備え、
    　前記逆波形発生部で発生された波形を前記ＥＴ電圧に重畳することを特徴とする無線機。     A wireless device comprising: a main amplifier for amplifying a signal to be transmitted wirelessly; and an ET output unit for outputting an ET voltage that follows the envelope of the signal and supplying the ET voltage to the main amplifier,
    The ET output unit operates based on a switching waveform of a predetermined frequency,
    It comprises an inverse waveform generation unit that generates an inverse phase waveform corresponding to the component of the predetermined frequency assumed to be included in the ET voltage,
    A radio apparatus characterized in that a waveform generated by the reverse waveform generation unit is superimposed on the ET voltage.
  6. 　無線送信する信号を増幅する主増幅器と、前記信号のエンベロープに追従するＥＴ電圧を出力して前記主増幅器に供給するＥＴ出力部とを備えた無線機における無線出力増幅方法であって、
    　前記ＥＴ出力部は、所定周波数のスイッチング波形に基づいて動作しており、
    　前記ＥＴ電圧に前記所定周波数の成分を逆相にする変換を施して変換後のＥＴ電圧を前記主増幅器の前段の増幅器に供給、もしくは、前記ＥＴ電圧に含まれることが想定される前記所定周波数の成分に対応する逆位相の波形を発生させて前記ＥＴ電圧に重畳、の少なくともいずれかを施すことを特徴とする無線出力増幅方法。     A wireless output amplification method in a wireless device, comprising: a main amplifier for amplifying a signal to be transmitted wirelessly; and an ET output unit for outputting an ET voltage following the envelope of the signal and supplying the ET voltage to the main amplifier,
    The ET output unit operates based on a switching waveform of a predetermined frequency,
    The ET voltage is converted to reverse phase the component of the predetermined frequency, and the converted ET voltage is supplied to the amplifier at the front stage of the main amplifier or the predetermined frequency assumed to be included in the ET voltage And generating a waveform in reverse phase corresponding to the component of (1) and superimposing the waveform on the ET voltage.
PCT/JP2018/027502 2017-08-04 2018-07-23 Wireless device and wireless output amplification method WO2019026669A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006093872A (en) * 2004-09-21 2006-04-06 Matsushita Electric Ind Co Ltd Eer modulation amplifier device
WO2009101905A1 (en) * 2008-02-14 2009-08-20 Nec Corporation Power amplifier
JP2011249892A (en) * 2010-05-24 2011-12-08 Mitsubishi Electric Corp Bias control amplifier
WO2016130780A1 (en) * 2015-02-11 2016-08-18 Snaptrack, Incorporated Ac amplifier output impedance reduction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006093872A (en) * 2004-09-21 2006-04-06 Matsushita Electric Ind Co Ltd Eer modulation amplifier device
WO2009101905A1 (en) * 2008-02-14 2009-08-20 Nec Corporation Power amplifier
JP2011249892A (en) * 2010-05-24 2011-12-08 Mitsubishi Electric Corp Bias control amplifier
WO2016130780A1 (en) * 2015-02-11 2016-08-18 Snaptrack, Incorporated Ac amplifier output impedance reduction

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