WO2017028563A1 - Appareil à circuit d'amplification de puissance doherty symétrique et amplificateur de puissance - Google Patents

Appareil à circuit d'amplification de puissance doherty symétrique et amplificateur de puissance Download PDF

Info

Publication number
WO2017028563A1
WO2017028563A1 PCT/CN2016/082085 CN2016082085W WO2017028563A1 WO 2017028563 A1 WO2017028563 A1 WO 2017028563A1 CN 2016082085 W CN2016082085 W CN 2016082085W WO 2017028563 A1 WO2017028563 A1 WO 2017028563A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
microstrip line
auxiliary
main
network
Prior art date
Application number
PCT/CN2016/082085
Other languages
English (en)
Chinese (zh)
Inventor
余敏德
舒峰
段斌
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201510590101.3A external-priority patent/CN106257827B/zh
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2017028563A1 publication Critical patent/WO2017028563A1/fr

Links

Images

Classifications

    • 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
    • H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
    • H03F1/06—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators
    • H03F1/07—Doherty-type amplifiers

Definitions

  • the present application relates to, but is not limited to, the field of communications, and in particular to a symmetric Doherty power amplifier circuit device and power amplifier.
  • the power amplifier (referred to as power amplifier) as an important part of the base station directly relates to the quality and communication effect of the signal transmitted by the base station.
  • the base station In order to improve the transmission rate and utilize spectrum resources more effectively, the base station widely adopts Orthogonal Frequency Division Multiplexing (OFDM) and Quadrature Phase Shift Keyin (QPSK) peaks.
  • OFDM Orthogonal Frequency Division Multiplexing
  • QPSK Quadrature Phase Shift Keyin
  • the ratio is more than the modulation mode. Therefore, it is required to work normally under the condition of peak-to-average ratio. Not only must the linear index be met, but also the high working efficiency needs to be reached.
  • the DOHERTY amplifier is equipped with digital pre-distortion (DPD). ) can better meet the above requirements, therefore, Doherty power amplifier has become a research hotspot of current base station applications.
  • DPD digital pre-distortion
  • FIG. 1 is a schematic circuit diagram of a Doherty power amplifier in the related art. As shown in FIG. 1 , it is composed of 2 to a plurality of power amplifier tubes, and is divided into a main power amplifier PA1 and an auxiliary power amplifier PA2. The input signal is separated into the main power amplifier PA1 and the auxiliary power amplifier PA2 through the bridge, and is amplified by two channels and then combined into one way. In order to compensate for the 90° phase difference caused by the bridge, the output of the main power amplifier PA1 needs to be phase aligned through the 1/4 wavelength microstrip line.
  • the symmetric DOHERTY power amplifier adopts the same power tube and the same structure as the auxiliary power amplifier PA1 and the auxiliary power amplifier PA2, and has the characteristics of relatively easy design and good production consistency in the case of the Peak-to-Average Ratio (PAR). It has been widely used.
  • PAR Peak-to-Average Ratio
  • the auxiliary power amplifier PA2 is in the off state.
  • the auxiliary power amplifier PA2 power needs to be adopted by the OFFSET impedance line of the appropriate electrical length.
  • the cut-off impedance of the tube is impedance-transformed so that it has a high-resistance open state for the main power amplifier PA1 at the junction of the power synthesis unit, and when the output power of the main power amplifier PA1 is gradually increased, the auxiliary power amplifier PA2 starts to work, and at the same time, the main work
  • the load modulation of PA1 makes the output impedance of the main power amplifier PA1 power tube continuously shift from the highest efficiency point to the maximum power point, and finally the auxiliary power amplifier PA2
  • the power tube together achieves the maximum power point output impedance.
  • the symmetric Doherty power tube saturation power and the maximum efficiency point impedance need to satisfy the 2:1 VSWR impedance relationship, and the main power amplifier power tube is required in the peak-to-average ratio application.
  • the corresponding VSWR impedance relationship is greater than 2:1, but since the symmetrical Doherty main power amplifier PA1 power tube output impedance cannot meet the load modulation when the auxiliary amplifier is working, it is greater than the standing wave 2:1 impedance requirement, and the symmetric DOHERTY amplifier will be used.
  • the efficiency or output power has an impact.
  • the saturation power maximum point and the efficiency maximum point impedance relationship of the power tube are greater than the 2:1 standing wave ratio.
  • the maximum power point and maximum efficiency are required. Select a suitable impedance in the vicinity of the point to compromise the performance so that the two meet the 2:1 standing wave ratio relationship, which will also have a loss in output power and work efficiency.
  • the symmetric DOHERTY power amplifier circuit cannot adapt to the problem of high peak-to-average ratio requirement, and an effective solution has not been proposed.
  • a symmetric Doherty power amplifier circuit device comprising: a power distribution unit configured to allocate an input signal to a plurality of signals of a predetermined phase difference, and output to the main amplification channel respectively And an auxiliary amplification channel;
  • the main amplification channel includes: an additional phase shifting network, a main amplification channel microstrip line connected to the additional phase shifting network, and a main amplifier connected to the main amplification channel microstrip line, configured to pass through The additional phase shifting network and the main amplification channel microstrip line perform phase alignment of the main amplification channel signal and the auxiliary amplification channel signal, and power amplification of the main amplification channel signal by the main amplifier;
  • at least one auxiliary amplification channel including: auxiliary An amplifying channel microstrip line, an auxiliary amplifier connected to the auxiliary amplifying channel microstrip line, a reactance with the auxiliary amplifier connected to the output power change network, and configured to perform an auxiliary amplifying channel
  • phase characteristic of the additional phase shifting network is the same as the phase characteristic of the reactance with the output power variation network.
  • the additional phase shifting network is configured to cancel the phase difference caused by the reactance changing network with the output power.
  • main amplification channel microstrip line is set to cancel the predetermined phase difference and a phase difference caused by the auxiliary amplification channel microstrip line and the auxiliary amplifier.
  • auxiliary amplification channel microstrip line is arranged to cancel the phase difference caused by the main amplification channel microstrip line and the main amplifier.
  • the reactance varies with the output power of the network to set: in the high-efficiency operation state of the main amplifier small signal, by controlling the value of the inductive impedance or the capacitive impedance at the junction point caused by the control, the shutdown impedance is reduced to Predetermined value.
  • the additional phase shifting network is: an offset microstrip line, an inductor-capacitor LC phase shifting network, or a resistor-capacitor RC phase shifting network.
  • the network whose reactance varies with the output power is: an offset microstrip line, a varactor diode, or a variable reactance circuit.
  • the primary amplification channel microstrip line includes: a first biased microstrip line connected to the additional phase shifting network, a second biased microstrip line connected to the main amplifier output, and The second biased microstrip line is connected to a 1/4 wavelength microstrip line.
  • the auxiliary amplification channel microstrip line includes: a third offset microstrip line connected to the power distribution unit, and a fourth offset microstrip line connected to the reactance with the output power change network.
  • a symmetric Doherty DOHERTY power amplifier comprising: a main power amplification channel and one or more auxiliary power amplification channels, wherein the main power amplification channel comprises: a first compensation microstrip line, a main power amplifier, and a second compensation microstrip line connected in series; each of the auxiliary power amplification channels includes: a third compensation microstrip line sequentially connected in series, an auxiliary power amplifier, and a fourth compensation micro a strip line, wherein the DOHERTY power amplifier further includes: a reactance with power variation network disposed on the auxiliary power amplification channel, wherein the reactance with the power variation network is set to turn off the auxiliary power amplifier Set to a first predetermined threshold; an additional phase shifting network, disposed on the main power amplifying channel, wherein The additional phase shifting network is configured such that the first phase difference is the same as the second phase difference, wherein the first phase is an input signal received by an input end of the main power amplifying channel and
  • the reactance is connected between the auxiliary power amplifier and the fourth compensated microstrip line with a power change network, or the reactance is connected to the fourth compensated microstrip line and the Between the outputs of the auxiliary power amplifier channels.
  • the additional phase shifting network is connected between the input end of the main power amplifying channel and the first compensating microstrip line, or the additional phase shifting network is connected to the first compensating microstrip line and Between the main power amplifiers.
  • phase and frequency characteristics of the additional phase shifting network are the same as the phase and frequency characteristics of the reactance with the power varying network.
  • the strip lines are commonly arranged such that the first phase difference is the same as the second phase difference.
  • the fourth compensation microstrip line is set such that an impedance of the auxiliary power amplification channel is a second predetermined threshold and a turn-off impedance of the auxiliary power amplifier is adjusted to a third predetermined threshold, wherein the third The predetermined threshold is greater than the first predetermined threshold.
  • the DOHERTY power amplifier further includes: a power distribution unit configured to allocate power, wherein an input end of the power distribution unit is configured to receive an input signal, and a first output end of the power distribution unit is connected to the additional An input end of the phase shifting network, the second output end of the power distribution unit is connected to the third compensation microstrip line; a power combining unit configured to synthesize power, wherein the first input end of the power combining unit passes a microstrip impedance conversion line connected to the second compensation microstrip line, a second input end of the power synthesis unit being connected to the fourth compensation microstrip line, or a second input end of the power synthesis unit The reactance varies with the power change network connection.
  • the power distribution unit allocates the input signal as a multiplex signal having a phase difference of 90°, and inputs the multiplex signal to the main power amplification channel and the one or more Auxiliary power amplification channel.
  • the power of each signal of the multiple signals is 1/N of the input signal power, where N is the number of the multiple signals.
  • the power distribution unit comprises a bridge.
  • the additional phase shifting network includes at least one of the following: a microstrip line; an LC phase shifting network composed of an inductor and a capacitor; and an RC phase shifting network composed of a capacitor and a resistor.
  • the reactance with power variation network includes at least one of the following: a microstrip line; a varactor diode; and a reactance circuit.
  • a symmetric Doherty DOHERTY power amplifier comprising: a main power amplification channel and one or more auxiliary power amplification channels, wherein the main power amplification channel comprises: a first compensation microstrip connected in series in series a line, a main power amplifier and a second compensating microstrip line; each auxiliary power amplifying channel comprises: a third compensating microstrip line connected in series, an auxiliary power amplifier and a fourth compensating microstrip line, wherein the DOHERTY power amplifier further comprises The reactance with power variation network is disposed on the auxiliary power amplification channel, wherein the reactance with the power variation network is set to set the shutdown impedance of the auxiliary power amplifier to a first predetermined threshold; the additional phase shift network is set in the main power amplification channel And wherein the additional phase shifting network is set such that the first phase difference is the same as the second phase difference, wherein the first phase is received by the input end of the main power amplifying channel and the input end
  • the problem that the symmetric DOHERTY power amplifier circuit can not adapt to the high peak-to-average ratio requirement is solved, thereby achieving the standing wave ratio relationship of the main power amplifier saturation power and the maximum efficiency point impedance, and the application range of the symmetric DOHERTY power amplifier circuit is expanded.
  • Improve the efficiency of the symmetrical DOHERTY power amplifier circuit in the peak-to-average ratio application so that the symmetrical DOHERTY power amplifier circuit can adapt to the higher peak-to-average ratio requirements, and at the same time, it can also improve the linearity of the power amplifier.
  • 1 is a circuit diagram of a Doherty power amplifier in the related art
  • FIG. 2 is a schematic structural diagram of a DOHERTY power amplifier according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram (1) of a power amplifier DOHERTY power amplifier circuit according to an embodiment of the invention.
  • FIG. 4 is a schematic diagram (II) of a power amplifier DOHERTY power amplifier circuit according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a shutdown impedance when an auxiliary amplifier is turned off in the related art
  • FIG. 6 is a schematic diagram of an auxiliary amplifier turn-off impedance according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a junction point impedance when an auxiliary amplifier transitions from an off-operation state to a high-power output state, in accordance with an embodiment of the present invention.
  • Figure 10 is a graph showing the output power and additional phase shift of a DOHERTY power amplifier in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a DOHERTY power amplifier according to an embodiment of the present invention.
  • the method includes: a main power amplification channel 22 and one or more The auxiliary power amplifying channel 24, wherein the main power amplifying channel 22 comprises: a first compensating microstrip line connected in series, a main power amplifier and a second compensating microstrip line; each auxiliary power amplifying channel 24 comprises: serially connected in series a third compensation microstrip line, an auxiliary power amplifier, and a fourth compensation microstrip line, wherein the DOHERTY power amplifier further includes: a reactance with power variation network 242 disposed on the auxiliary power amplification channel 24, wherein the reactance varies with the power 242 is configured to set the turn-off impedance of the auxiliary power amplifier to a first predetermined threshold; an additional phase shifting network 222 disposed on the main power amplifying channel 22, wherein the additional phase shifting network
  • the additional phase shifting network and the auxiliary power amplifying channel added by the main power amplifying channel in the above DOHERTY power amplifier increase the reactance with the power variation network, and the symmetric DOHERTY power amplifier circuit is solved by adjusting the additional phase shifting network and the auxiliary power amplifying channel. It can adapt to the problem of higher peak-to-average ratio requirement, and then improve the standing wave ratio relationship between the main power amplifier saturation power and the maximum efficiency point impedance, expand the application range of the symmetric DOHERTY power amplifier circuit, and improve the peak-to-average ratio application of the symmetric DOHERTY power amplifier circuit.
  • the efficiency makes the symmetrical DOHERTY power amplifier circuit adapt to the higher peak-to-average ratio requirements, and at the same time has a certain effect of improving the linearity of the power amplifier.
  • the reactance with power variation network 242 is disposed on the auxiliary power amplification channel 24, wherein the reactance is connected between the auxiliary power amplifier and the fourth compensated microstrip line with the power variation network 242, or the reactance is connected to the power variation network 242 at the fourth Compensating between the microstrip line and the output of the auxiliary power amplification channel.
  • the additional phase shifting network 222 is disposed in the main power amplifying channel 22, wherein the additional phase shifting network 222 can also be connected between the input of the main power amplifying channel 22 and the first compensating microstrip line, or the additional phase shifting network 222 is connected. Between the first compensated microstrip line and the main power amplifier.
  • phase and frequency characteristics of the additional phase shifting network 222 are the same as the phase and frequency characteristics of the reactance with the power varying network 242.
  • the reactance with power variation network 242, the additional phase shifting network 222, the first compensation microstrip line, the second compensation microstrip line, the third compensation microstrip line, and the fourth compensation microstrip line are collectively set such that the first phase difference is Same as the second phase difference.
  • the fourth compensation microstrip line is set such that the impedance of the auxiliary power amplification channel is a second predetermined threshold and the off impedance of the auxiliary power amplifier is adjusted to a third predetermined threshold, wherein the third predetermined threshold is greater than the first predetermined Threshold.
  • the DOHERTY power amplifier also includes other parts to better accommodate the symmetrical DOHERTY power amplifier circuit to accommodate higher peak-to-average ratio requirements.
  • the DOHERTY power amplifier can also include a power distribution unit configured to distribute power, wherein an input of the power distribution unit is configured to receive an input signal, a first output of the power distribution unit is coupled to an input of the additional phase shifting network, and a second output of the power distribution unit Connected to the third compensation microstrip line; a power synthesis unit configured to synthesize power, wherein the first input end of the power synthesis unit is connected to the second compensation microstrip line through a microstrip impedance conversion line, the power synthesis unit The second input is coupled to the fourth compensated microstrip line, or the second input of the power combining unit is coupled to the reactance with the power change network.
  • the power distribution unit may allocate the input signal as a multiplex signal with a phase difference of 90°, and input the multiplex signal to the main power amplification channel and the one or more auxiliary power amplification channels, respectively.
  • the power of each signal of the multiplex signal is 1/N of the power of the input signal, where N is the number of the multiplex signals.
  • the power distribution unit comprises a bridge.
  • the additional phase shifting network 222 described above can be configured in a variety of ways, as exemplified below.
  • the additional phase shifting network 222 may include at least one of the following: a microstrip line; an LC phase shifting network composed of an inductor and a capacitor; and an RC phase shifting network composed of a capacitor and a resistor.
  • the above-mentioned reactance with power change network 224 can also have various forms of composition, which will be exemplified below.
  • the reactance with power variation network 224 may include at least one of the following: a microstrip line; a varactor diode; and a reactance circuit.
  • a symmetric Doherty power amplifier circuit device is also provided, which is configured to implement the above-described embodiments and preferred embodiments, and has not been described again.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • a symmetric Doherty power amplifier circuit device comprising: a power distribution unit configured to distribute the input signal into a plurality of signals of a predetermined phase difference, and output to the main amplification channel and the auxiliary amplification respectively.
  • a main amplification channel comprising: an additional phase shifting network, a main amplifying channel microstrip line connected to the additional phase shifting network, and a main amplifier connected to the main amplifying channel microstrip line, configured to pass the additional phase shifting network, And the main amplification channel microstrip line for the main amplification channel
  • the signal is aligned with the phase of the auxiliary amplification channel signal, and the main amplification channel signal is amplified by the main amplifier;
  • at least one auxiliary amplification channel includes: an auxiliary amplification channel microstrip line, and an auxiliary amplifier connected to the auxiliary amplification channel microstrip line a reactance reacting with the auxiliary amplifier with the output power variation network, configured to perform phase alignment of the auxiliary amplification channel signal and the main amplification channel signal through the auxiliary amplification channel microstrip line, and power amplification of the auxiliary amplification channel signal by the auxiliary amplifier
  • the symmetrical DOHERTY power amplifier circuit is solved by adjusting the additional phase shifting network and the auxiliary power amplifying channel by the additional phase shifting network added by the main power amplifying channel and the auxiliary power amplifying channel added by the above-mentioned DOHERTY power amplifier circuit device. It is unable to adapt to the problem of higher peak-to-average ratio requirements, thereby improving the standing wave ratio relationship between the main power amplifier saturation power and the maximum efficiency point impedance, extending the application range of the symmetric DOHERTY power amplifier circuit, and improving the peak-to-average ratio of the symmetric DOHERTY power amplifier circuit.
  • the efficiency of the application makes the symmetrical DOHERTY power amplifier circuit adapt to the higher peak-to-average ratio requirements, and at the same time has a certain effect of improving the linearity of the power amplifier.
  • phase characteristic of the additional phase shifting network is the same as the phase characteristic of the reactance with the output power changing network.
  • the additional phase shifting network is set to: cancel out the phase difference caused by the reactance changing network with the output power.
  • the main amplification channel microstrip line is set to cancel the predetermined phase difference and the phase difference caused by the auxiliary amplification channel microstrip line and the auxiliary amplifier.
  • the auxiliary amplification channel microstrip line is set to cancel the phase difference caused by the main amplification channel microstrip line and the main amplifier.
  • the reactance varies with the output power of the network to set the impedance to a predetermined value by controlling the value of the inductive impedance or the capacitive impedance at the combining point caused by the main amplifier small signal high efficiency operating state.
  • the additional phase shifting network is: an offset microstrip line, an inductor-capacitor LC phase shifting network, or a resistor Capacitor RC phase shifting network.
  • the reactance varies with the output power of the network: biased microstrip line, varactor diode, or variable reactance circuit.
  • the main amplification channel microstrip line includes: a first biased microstrip line connected to the additional phase shifting network, a second biased microstrip line connected to the main amplifier output, and the second offset micro 1/4 wavelength microstrip line with line connection.
  • the auxiliary amplification channel microstrip line includes: a third offset microstrip line connected to the power distribution unit, and a fourth offset microstrip line connected to the reactance with the output power change network.
  • the main purpose of the optional embodiment of the present invention is to provide a symmetric DOHERTY power amplifier circuit, which aims to improve the efficiency of the symmetric DOHERTY power amplifier circuit in peak-to-average ratio application, and at the same time has a certain effect of improving the linearity of the power amplifier.
  • FIG. 3 is a schematic diagram of a power amplifier DOHERTY power amplifier circuit according to an embodiment of the present invention.
  • the principle block diagram is as shown in FIG. 3, and the circuit includes a power distribution unit 1, a main amplification unit 2, a power synthesis unit 4, and At least one auxiliary amplifying unit 3 and an additional phase shifting network 8 connected in series with said main amplifying unit 2 and a reactance dependent output power varying network 9 connected in series with the auxiliary amplifier output, and associated OFFSET connecting lines 6, 7, 10, 11 and 1/4 wavelength impedance conversion line 5.
  • the additional phase shifting network 8 and the reactance are identical in phase characteristics with the output power varying network 9, and are arranged to cancel the phase difference introduced by the network 9 due to the increase of the reactance with the output power.
  • the power distribution unit 1 comprises a bridge, the input of which is connected to the input signal, and the two outputs are respectively connected to the additional phase shifting network 8 of the main amplifying unit and the input OFFSET line 6 of the auxiliary amplifying unit.
  • the main amplifying unit 2 comprises a main amplifier
  • the auxiliary amplifying unit 3 comprises an auxiliary amplifier
  • the additional phase shifting network 8 is connected to the output of the bridge
  • the input of the main amplifier is connected to the additional phase shifting network 8 via the OFFSET line 7
  • the main amplifier PA3 A 1/4 wavelength microstrip impedance conversion line 5 is connected between the output terminal and the power combining unit 4.
  • the power distribution unit distributes the input signal into a plurality of road signals with a phase difference of 90°, and then outputs the signals to the main amplification unit and the auxiliary amplification unit for amplification;
  • the reactance varies with the output power variation network 9, and the auxiliary amplification line composed of the output offset line 11, the input terminal of the auxiliary amplifier PA4 and the output terminal of the bridge, and the output terminal of the auxiliary amplifier PA4 and the reactance with the output power varying unit 9,
  • the OFFSET line 6 mainly plays a phase alignment with the main path phase, and the OFFSET line 11 mainly performs impedance matching and improves the impedance of the PA4 turn-off impedance.
  • the phase alignment of the main amplification path and the auxiliary amplification path can be achieved, and the phase difference is cancelled.
  • the main path and the auxiliary path signal are combined into one signal and then output by the combining unit 4.
  • the auxiliary power amplifier PA4 needs to make its turn-off impedance close to the open state at the junction point through the appropriate OFFSET 11 impedance line, as shown in Figure 5, so that the impedance of the main amplification path and the auxiliary amplification path at the junction point is output in the power amplifier.
  • the condition of the large and small signals is basically the same, that is, the standing wave ratio is 1:1.
  • the symmetric Doherty power tube saturation power and the maximum efficiency point impedance need to satisfy the 2:1 standing wave ratio impedance relationship.
  • a power amplifier circuit, a power amplifying device and a matching method thereof are provided by the embodiment of the present invention, by adding a reactance with the output power change network 9 behind the auxiliary power amplifier PA4, so that the turn-off point of the combined point is appropriately deviated from the open state, so that when the main power amplifier PA3 When working in a small signal high efficiency state, the auxiliary power amplifier PA4 and the reactance with the output power change network 9 will introduce a certain inductive or capacitive impedance at the combining point as shown in Fig. 6. Controlling the reactance value at this place can reduce the main power amplifier small The impedance of the junction when the signal is operating at high efficiency.
  • the auxiliary amplifier PA4 When the main power amplifier PA3 is working at a high power, the auxiliary amplifier PA4 is switched between the off-state impedance value and the high-power state impedance value due to the load pull effect of the auxiliary power amplifier PA4 and the reactance with the output power variation network 9 .
  • the result is shown in Fig. 7.
  • the load value of the capacitive load cut-off state is exemplified.
  • the combined point is changed by the auxiliary power amplifier PA4 and the reactance with the output power under the impedance value and the low power condition corresponding to the maximum output power.
  • the standing wave ratio of the impedance value of the combined point caused by the decrease of the impedance of the combined point of the network 9 will increase, and the corresponding Doherty can be improved.
  • the equivalent is equivalent to grounding the inductor or capacitor in parallel with the output combining unit, which can cause the initial phase of the small signal output to be advanced or lag by a certain angle.
  • the reactance with the output power change network 9 can be made by the reasonable design and auxiliary power amplifier PA4 connection.
  • the phase angle is opposite to the AM-PM characteristics of the usual DOHERTY amplifier (as shown in Figure 9), both to some extent.
  • the mutual cancellation can improve the AM-PM distortion of the whole power amplifier, thereby improving the linearity index of the power amplifier.
  • FIG. 10 The schematic diagram of the effect of the specific AM-PM improvement is shown in FIG. 10. It can be seen from FIG. 10 that after the embodiment of the present invention, the power amplifier AM-PM The range of characteristics with power amplifier power can be reduced from 0.2 to 0.3 (radian) to 0.22 to 0.35. The reduction of the AM-PM range indicates that the AM-PM characteristics are improved.
  • FIG. 4 is a schematic diagram (2) of a power amplifier DOHERTY power amplifier circuit according to an embodiment of the present invention, as shown in FIG. 4:
  • Power distribution unit 1 additional phase shifting network 8, 50 ohm microstrip line OFFSET 7, main amplifier PA3, 50 ohm microstrip line OFFSET 10, 50 ohm 1/4 wavelength microstrip line 5 constitutes the main amplification path.
  • 50 ohm microstrip line OFFSET 6 auxiliary amplifier PA4, reactance with output power change network 9, 50 ohm microstrip line OFFSET 11 constitutes an auxiliary amplification path.
  • the main amplification path and the auxiliary amplification path are respectively connected to the power distribution unit 1 and the power synthesis unit 4 to form a 50 ohm 2-way symmetric Doherty circuit.
  • the power distribution unit 1 is composed of a bridge and its peripheral circuits.
  • the bridge in this example may be a bridge of 3dB, 5dB or other specifications, which is not limited herein.
  • the bridge is a 3dB bridge as an example.
  • the input terminal of the 3dB bridge is connected to the input signal, and the two output terminals of the 3dB bridge are respectively connected to the additional phase shifting network 8 and the OFFSET line 6 of the auxiliary amplifying unit 3.
  • the additional phase shifting network 8 in this example is composed of a microstrip line, and it should be noted that the network is also It can be composed of an LC phase shifting network composed of an inductor and a capacitor or an RC phase shifting network composed of a capacitor and a resistor.
  • the phase shifting characteristic of the network needs to be the same as the phase shifting characteristic of the reactance with the output power variation network 9, and the specific form is not limited herein.
  • the network is connected to the main amplifier PA3 through the OFFSET 7, the input end of the auxiliary amplifier PA4 is connected to the output end of the 3dB bridge through the OFFSET 6, and the output end of the auxiliary amplifier main unit PA4 is passed through the reactance with the output power change network 9 And the output OFFSET 11 is connected to the combined output unit 4, and when the DOHERTY circuit operates, the reactance changes with the output power change network 9 and the auxiliary power amplifier unit 4 together with the auxiliary power amplifier PA4 operating state change and output power change
  • the impedance of the waypoint point P in Figure 4 of the specification). In this example, the reactance varies with the output power.
  • the network 9 is composed of a microstrip line of suitable electrical length. In other cases, it can be controlled by a voltage-controlled varactor or other. Control the composition of the variable reactance circuit.
  • Adjusting the 50 ohm microstrip line length of the power variation network 9 connected to the auxiliary amplifier PA4 in this example can make the auxiliary amplifier PA4 power tube turn-off impedance exhibit capacitive reactance at the junction, and an initial -12° is added. Phase shift, at this time, the main power amplifier PA3 power tube saturation power point and the maximum efficiency point impedance relationship satisfy the 2.5:1 asymmetry ratio relationship, which can better meet the peak-to-average ratio requirement of about 8 dB.
  • the circuit expands the application range of the symmetric DOHERTY in the peak-to-average ratio (PAR>6dB), and the corresponding initial phase shift can compensate the circuit AM to a certain extent. -PM distortion, which in turn improves the linearity of the circuit.
  • a power amplifying device is provided in the embodiment of the present invention.
  • the circuit structure and principle of the power amplifier circuit can be referred to the foregoing, and details are not described herein again. Due to the adoption of the above power amplifier circuit, the output power and efficiency are improved, the adaptability of the power amplifier circuit to the peak-to-average ratio signal is expanded, and the AM-PM characteristic is improved to improve the linearity index of the Doherty power amplifier.
  • the power amplifier circuit, the power amplifying device and the design method thereof by adding an additional phase shifting network and a reactance with the output power change network in the main power amplifier unit and the auxiliary power amplifier unit, respectively, controlling the impedance characteristics when the power point of the auxiliary point auxiliary amplifier is turned off.
  • Increasing the standing wave ratio relationship between the main power amplifier saturation power and the maximum efficiency point impedance extends the application range of the symmetric DOHERTY power amplifier circuit, so that the symmetric DOHERTY power amplifier circuit can adapt to higher peak-to-average ratio requirements.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed.
  • they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases,
  • the steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of the modules or steps may be implemented as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • An embodiment of the present invention provides a symmetric Doherty power amplifier circuit device, including: a power distribution unit configured to allocate an input signal to a plurality of signals of a predetermined phase difference, and output to the main amplification channel and the auxiliary amplification channel, respectively; a main amplification channel, comprising: an additional phase shifting network, a main amplification channel microstrip line connected to the additional phase shifting network, and a main amplifier connected to the main amplification channel microstrip line, configured to pass the additional phase shifting network And a main amplification channel microstrip line for phase alignment of the main amplification channel signal and the auxiliary amplification channel signal, wherein the main amplification channel signal is power amplified by the main amplifier; at least one auxiliary amplification channel, including: an auxiliary amplification channel microstrip line And an auxiliary amplifier connected to the auxiliary amplification channel microstrip line, a reactance connected to the auxiliary amplifier, and an output power variation network, configured to perform an auxiliary amplification channel signal and
  • the embodiment of the invention further provides a symmetric Doherty DOHERTY power amplifier, comprising: a main power amplification channel and one or more auxiliary power amplification channels, wherein the main power amplification channel comprises: a first compensation connected in series in series a microstrip line, a main power amplifier and a second compensating microstrip line; each of the auxiliary power amplifying channels comprises: a third compensating microstrip line connected in series in series, and a secondary a power amplifier and a fourth compensation microstrip line, wherein the DOHERTY power amplifier further includes: a reactance with power variation network, disposed on the auxiliary power amplification channel, wherein the reactance is set with a power change network The turn-off impedance of the auxiliary power amplifier is set to a first predetermined threshold; an additional phase shifting network is disposed on the main power amplifying channel, wherein the additional phase shifting network is set such that the first phase difference and the second phase difference are The same, wherein the first phase is a phase difference between an input
  • a symmetric Doherty DOHERTY power amplifier comprising: a main power amplification channel and one or more auxiliary power amplification channels, wherein the main power amplification channel comprises: a first compensation microstrip connected in series in series a line, a main power amplifier and a second compensating microstrip line; each auxiliary power amplifying channel comprises: a third compensating microstrip line connected in series, an auxiliary power amplifier and a fourth compensating microstrip line, wherein the DOHERTY power amplifier further comprises The reactance with power variation network is disposed on the auxiliary power amplification channel, wherein the reactance with the power variation network is set to set the shutdown impedance of the auxiliary power amplifier to a first predetermined threshold; the additional phase shift network is set in the main power amplification channel And wherein the additional phase shifting network is set such that the first phase difference is the same as the second phase difference, wherein the first phase is received by the input end of the main power amplifying channel and the input end
  • the problem that the symmetric DOHERTY power amplifier circuit can not adapt to the high peak-to-average ratio requirement is solved, thereby achieving the standing wave ratio relationship of the main power amplifier saturation power and the maximum efficiency point impedance, and the application range of the symmetric DOHERTY power amplifier circuit is expanded.
  • Improve the efficiency of the symmetrical DOHERTY power amplifier circuit in the peak-to-average ratio application so that the symmetrical DOHERTY power amplifier circuit can adapt to the higher peak-to-average ratio requirements, and at the same time, it can also improve the linearity of the power amplifier.

Landscapes

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

Abstract

L'invention concerne un appareil à circuit d'amplification de puissance Doherty symétrique et un amplificateur de puissance. L'amplificateur de puissance Doherty symétrique comprend un canal d'amplification de puissance principal et un ou plusieurs canaux d'amplification de puissance auxiliaires. L'amplificateur de puissance Doherty comprend en outre : un réseau à réactance variable en fonction de la puissance qui est disposé sur le canal d'amplification de puissance auxiliaire ; et un réseau de déphasage supplémentaire qui est disposé sur le canal d'amplification de puissance principal, une première phase étant une différence de phase entre un signal d'entrée reçu par une extrémité d'entrée du canal d'amplification de puissance principal et un signal d'entrée reçu par une extrémité d'entrée du canal d'amplification de puissance auxiliaire, et une deuxième phase étant une différence de phase entre un signal de sortie délivré par une extrémité de sortie du canal d'amplification de puissance principal et un signal de sortie délivré par une extrémité de sortie du canal d'amplification de puissance auxiliaire. De cette manière, le problème qui est qu'un circuit d'amplification de puissance Doherty symétrique ne peut pas satisfaire une exigence de rapport crête sur moyenne relativement élevé est résolu.
PCT/CN2016/082085 2015-08-20 2016-05-13 Appareil à circuit d'amplification de puissance doherty symétrique et amplificateur de puissance WO2017028563A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201510514604.2 2015-08-20
CN201510514604.2A CN106470015A (zh) 2015-08-20 2015-08-20 对称多赫蒂Doherty功放电路装置及功率放大器
CN201510590101.3A CN106257827B (zh) 2015-06-17 2015-09-16 对称多赫蒂Doherty功放电路装置及功率放大器
CN201510590101.3 2015-09-16

Publications (1)

Publication Number Publication Date
WO2017028563A1 true WO2017028563A1 (fr) 2017-02-23

Family

ID=58050735

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/082085 WO2017028563A1 (fr) 2015-08-20 2016-05-13 Appareil à circuit d'amplification de puissance doherty symétrique et amplificateur de puissance

Country Status (2)

Country Link
CN (1) CN106470015A (fr)
WO (1) WO2017028563A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107733372A (zh) * 2017-11-07 2018-02-23 南京国博电子有限公司 一种宽带多尔蒂功率放大器
CN109167580A (zh) * 2018-10-30 2019-01-08 北京振兴计量测试研究所 一种平面四路功率合成放大器
CN109962686A (zh) * 2019-02-27 2019-07-02 宁波大学 一种双模式射频功率放大系统
CN113225027A (zh) * 2021-05-12 2021-08-06 北京百瑞互联技术有限公司 无线通信Chireix合成器、异相功率放大器及设备
CN114024507A (zh) * 2022-01-10 2022-02-08 荣耀终端有限公司 功率放大电路、射频前端电路、电子设备及信号放大方法
CN115297490A (zh) * 2022-07-27 2022-11-04 欧智通科技股份有限公司 一种扩展wi-fi辐射范围的装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107493076A (zh) * 2017-06-21 2017-12-19 中国电子科技集团公司第五十五研究所 利用拆装式延迟件改善相位均衡的Doherty放大器
CN109302151B (zh) * 2018-10-30 2023-04-07 新华三技术有限公司成都分公司 补偿线的电长度确定方法及Doherty功率放大器
CN110011621B (zh) * 2019-03-28 2023-07-28 杭州电子科技大学温州研究院有限公司 一种集成异向与多尔蒂结构的高回退范围射频功率放大器
CN111010092B (zh) * 2019-11-23 2023-06-02 杭州电子科技大学 一种新型Doherty功率放大器
CN113708731B (zh) * 2021-08-25 2022-07-29 优镓科技(北京)有限公司 一种基于相位失配的线性度增强Doherty功率放大器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006148523A (ja) * 2004-11-19 2006-06-08 Matsushita Electric Ind Co Ltd ドハティアンプ
CN101351961A (zh) * 2005-12-30 2009-01-21 艾利森电话股份有限公司 高效复合放大器
WO2013015778A1 (fr) * 2011-07-25 2013-01-31 Andrew Llc Circuit réglé activement ayant une porteuse parallèle et des chemins de pointe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006148523A (ja) * 2004-11-19 2006-06-08 Matsushita Electric Ind Co Ltd ドハティアンプ
CN101351961A (zh) * 2005-12-30 2009-01-21 艾利森电话股份有限公司 高效复合放大器
WO2013015778A1 (fr) * 2011-07-25 2013-01-31 Andrew Llc Circuit réglé activement ayant une porteuse parallèle et des chemins de pointe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107733372A (zh) * 2017-11-07 2018-02-23 南京国博电子有限公司 一种宽带多尔蒂功率放大器
CN109167580A (zh) * 2018-10-30 2019-01-08 北京振兴计量测试研究所 一种平面四路功率合成放大器
CN109962686A (zh) * 2019-02-27 2019-07-02 宁波大学 一种双模式射频功率放大系统
CN109962686B (zh) * 2019-02-27 2023-03-21 宁波大学 一种双模式射频功率放大系统
CN113225027A (zh) * 2021-05-12 2021-08-06 北京百瑞互联技术有限公司 无线通信Chireix合成器、异相功率放大器及设备
CN113225027B (zh) * 2021-05-12 2023-11-03 北京百瑞互联技术股份有限公司 无线通信Chireix合成器、异相功率放大器及设备
CN114024507A (zh) * 2022-01-10 2022-02-08 荣耀终端有限公司 功率放大电路、射频前端电路、电子设备及信号放大方法
CN115297490A (zh) * 2022-07-27 2022-11-04 欧智通科技股份有限公司 一种扩展wi-fi辐射范围的装置

Also Published As

Publication number Publication date
CN106470015A (zh) 2017-03-01

Similar Documents

Publication Publication Date Title
WO2017028563A1 (fr) Appareil à circuit d'amplification de puissance doherty symétrique et amplificateur de puissance
CN106537769B (zh) 与线性和高效宽带功率放大器有关的系统和方法
US9853610B2 (en) Systems and methods related to linear and efficient broadband power amplifiers
US9252722B2 (en) Enhanced and versatile N-way doherty power amplifier
CN107112953B (zh) 用于放大射频信号的功率放大器
US8305141B2 (en) Distributed Doherty power amplifier
EP2806557B1 (fr) Amplificateur de Doherty
CN107078698B (zh) 具有可调谐输入网络的多赫蒂功率放大器
US8174322B2 (en) Power control of reconfigurable outphasing chireix amplifiers and methods
US8203386B2 (en) Reconfigurable outphasing Chireix amplifiers and methods
CN106257827B (zh) 对称多赫蒂Doherty功放电路装置及功率放大器
EP3461000B1 (fr) Amplificateur doherty
US20110210786A1 (en) Doherty Amplifier with Input Network Optimized for MMIC
JP2008505521A (ja) 高い電力効率を有する集積化ドハティ型増幅装置
CN102696172A (zh) 具有多合体扩展的高频功率放大器
US20200412302A1 (en) Power amplifier
JPWO2016113905A1 (ja) ドハティ方式増幅器および電力増幅器
JP2009182635A (ja) ドハティ増幅器
JPWO2009131138A1 (ja) 増幅器
JP2008125044A (ja) 増幅器
JP5754362B2 (ja) 増幅器
JP7039826B2 (ja) ドハティ型増幅器
WO2016086975A1 (fr) Système d'amplification pour amplifier un signal de communication
RU51807U1 (ru) Многоканальное широкополосное усилительное устройство

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16836428

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16836428

Country of ref document: EP

Kind code of ref document: A1