Power amplifiers and electronic devices

Abstract

This application discloses a power amplifier and electronic device, relating to the field of radio frequency technology. The power amplifier includes a power selection module, N power amplification modules, and an output matching network module. Under full-rated power output, the power selection module selects the N power amplification modules to synthesize the output, and the output matching network module matches the output impedance of the N power amplification modules to a load with a preset ohm. Under non-full-rated power output, the power selection module selects M power amplification modules from the N power amplification modules to output, and the output matching network module matches the output impedance of the M power amplification modules to a load with a preset ohm. According to the embodiments of this application, it helps to improve the efficiency of the power amplifier under non-full-rated power output conditions.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and in particular to a power amplifier and electronic device. Background Technology

[0002] Doherty power amplifiers are the most common power amplifier architecture used in mobile communication base stations. These power amplifiers can maintain good efficiency levels at full rated output power. However, in actual operation of mobile communication base stations, power amplifiers typically operate at less than full rated power.

[0003] However, in related technologies, power amplifiers are inefficient when not operating at full rated power. Summary of the Invention

[0004] This application provides a power amplifier and electronic device that helps improve the efficiency of the power amplifier when it is not at full rated power output.

[0005] In a first aspect, this application provides a power amplifier, comprising:

[0006] The power selection module includes N selection output terminals, where N≥2 and N is an integer;

[0007] There are N power amplifier modules, including N amplification input terminals and N amplification output terminals, with each of the N amplification input terminals connected to one of the N selected output terminals;

[0008] The output matching network module is connected to all N amplified output terminals;

[0009] When the rated power is fully utilized, the power selection module is used to select N power amplifier modules to synthesize the output, and the output matching network module is used to match the output impedance of the N power amplifier modules to a load with a preset ohm.

[0010] When the power output is not at full rated power, the power selection module is used to select the output of M power amplifier modules out of N power amplifier modules, and the output matching network module is used to match the output impedance of the M power amplifier modules to a load with a preset ohm, where 1≤M<N, and M is an integer.

[0011] In one optional embodiment of the first aspect, the power selection module includes a first switching submodule, a first power numerator module, and N second switching submodules;

[0012] The first switch submodule includes a first A switch terminal, a second A switch terminal, and N third A switch terminals. The first A switch terminal is used to receive input signals.

[0013] The first power module includes a first power A terminal and N second power A terminals; the first power A terminal is connected to the second power A terminal.

[0014] The second switch submodule includes a first B switch terminal, a second B switch terminal, and a third B switch terminal; the first B switch terminal is connected to the third A switch terminal, the second B switch terminal is connected to the second A power divider terminal, and the third B switch terminal is connected to the amplifier input terminal.

[0015] Under full rated power output, the first power distribution terminal A is connected to the second power distribution terminal A, and N second power distribution terminals B are connected one-to-one with the N second power distribution terminals A, and the N second switch sub-modules are combined for output.

[0016] When the power output is not at full rated power, M first B switches are connected to M third A switches in a one-to-one correspondence, and (NM) first B switches are connected to (NM) second A power distribution terminals in a one-to-one correspondence.

[0017] In one optional embodiment of the first aspect, the output matching network module includes a first impedance transformation line, a second impedance transformation line, a third impedance transformation line, a fourth impedance transformation line, a fifth impedance transformation line, a first diode, and a second diode;

[0018] The first impedance transformation line connects to N amplification output terminals through the first junction point;

[0019] The second impedance transformation line and the third impedance transformation line are connected in series between the first node and the grounding terminal. The first node is located between the first junction point and the first impedance transformation line.

[0020] The first diode is connected between the second node and the ground terminal, and the second node is located between the second impedance transformation line and the third impedance transformation line;

[0021] The fourth and fifth impedance transformation lines are connected in series between the third node and the grounding terminal. The third node is located between the first impedance transformation line and the load.

[0022] The second diode is connected between the fourth node and the ground terminal. The fourth node is located between the fourth impedance transformation line and the fifth impedance transformation line.

[0023] When the rated power is fully output, both the first diode and the second diode are in an open circuit state, and the first impedance transformation line matches the output impedance of the N power amplifier modules to a load with a preset ohm.

[0024] When the power output is not at full rated power, both the first and second diodes are in a short-circuit state, and the second and fifth impedance transformation lines match the output impedance of the M power amplifier modules to a load with a preset ohm.

[0025] In one optional embodiment of the first aspect, the electrical length of the first impedance transformation line is a1, the electrical length of the second impedance transformation line is a2, the electrical length of the third impedance transformation line is a3, the electrical length of the fourth impedance transformation line is a4, and the electrical length of the fifth impedance transformation line is a5.

[0026] a1 = a2 + a3 = a4 + a5.

[0027] In one alternative implementation of the first aspect, a1 = a2 + a3 = a4 + a5 = λ / 4.

[0028] In one optional embodiment of the first aspect, the impedance of the second impedance transformation line is ZL2, the impedance of the third impedance transformation line is ZL3, the impedance of the fourth impedance transformation line is ZL4, and the impedance of the fifth impedance transformation line is ZL5.

[0029] ZL2 = ZL3, ZL4 = ZL5.

[0030] In one optional embodiment of the first aspect, the power amplification module includes a second power molecule module, a phase-shifting network submodule, a main amplifier, a peak amplifier, a sixth impedance transformation line, and a seventh impedance transformation line;

[0031] The second power module includes a first power output terminal, a second power output terminal and a third power output terminal, with the first power output terminal corresponding to the selected output terminal;

[0032] The second power divider terminal is connected to the output matching network module in sequence through the main amplifier, the sixth impedance transformation line and the seventh impedance transformation line;

[0033] The third B power divider is connected to the fifth node in sequence through the phase shifting network submodule and the peak amplifier. The fifth node is located between the sixth impedance transformation line and the seventh impedance transformation line.

[0034] The phase-shifting network submodule is used to provide a phase delay at a preset angle.

[0035] In one optional embodiment of the first aspect, the electrical length of the sixth impedance transformation line is a6, and the electrical length of the seventh impedance transformation line is a7, where a6 = a7.

[0036] In one alternative implementation of the first aspect, a6 = a7 = λ / 4.

[0037] Based on the same inventive concept, in a second aspect, embodiments of this application provide an electronic device including a power amplifier and a load as described in any embodiment of the first aspect, wherein the power amplifier is connected to the load connection.

[0038] According to the power amplifier and electronic device provided in the embodiments of this application, under full rated power output, the power selection module selects N power amplifier modules to synthesize the output, which helps to ensure efficiency under full rated power output. Under non-full rated power output, the power selection module selects M power amplifier modules from the N power amplifier modules for output, which helps to improve efficiency under non-full rated power output. In addition, through the output matching network module, the output impedance of the N or M power amplifier modules can be matched to a load of preset ohms, which helps to ensure the performance of the power amplifier under both full rated power and non-full rated power output. Attached Figure Description

[0039] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0040] Figure 1 A schematic diagram of the structure of a power amplifier provided in an embodiment of this application;

[0041] Figure 2 This is a schematic diagram of another structure of the power amplifier provided in an embodiment of this application;

[0042] Figure 3 This is a schematic diagram of another structure of the power amplifier provided in an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of one structure of the power amplifier in the comparative example;

[0044] Figure 5 This is a schematic diagram of another structure of the power amplifier in the comparative example;

[0045] Figure 6 A schematic diagram of an output matching network module in a power amplifier provided in an embodiment of this application;

[0046] Figure 7 A schematic diagram of the impedance transformation curves of the first impedance transformation line, the second impedance transformation line, and the fourth impedance transformation line provided in an embodiment of this application is shown.

[0047] Figure 8 This illustration shows a structural schematic diagram of an electronic device provided in an embodiment of this application.

[0048] Component symbol explanation:

[0049] 10. Power Amplifier; 11. Power Selection Module; 111. First Switch Submodule; 112. First Power Module; 113. Second Switch Submodule; 12. Power Amplification Module; 121. Second Power Module; 122. Phase Shifting Network Submodule; 123. Main Amplifier; 124. Peak Amplifier; 125. Sixth Impedance Transformation Line; 126. Seventh Impedance Transformation Line; 13. Output Matching Network Module; 131. First Impedance Transformation Line; 132. Second Impedance Transformation Line; 133. Third Impedance Transformation Line; 134. Fourth Impedance Transformation Line; 135. Fifth Impedance Transformation Line; 136. First Diode; 137. Second Diode; Q1. First Node; Q2. Second Node; Q3. Third Node; Q4. Fourth Node; Q5. Fifth Node; K1. First Combining Point; 20. Load; 100. Electronic Components;

[0050] A1. Driver amplifier; A2. First isolator; A3. Switch; A4. Power divider; A5. Phase shifter network; A6. Main amplifier; A7. Peak amplifier; A8. First impedance line; A9. Second impedance line; A10. Third impedance line; A11. Second isolator; A12. Diode A12;

[0051] B1, Driver Amplifier; B2, First Transmission Module; B3, First Power Amplifier Module; B4, Second Transmission Module; B5, Second Power Amplifier Module; B6, Third Transmission Module; B7, Third Power Amplifier Module; B8, Control Module. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] To address the technical problems described in the background section, this application provides a power amplifier and electronic device. The power amplifier and electronic device provided in this application will be described in detail below with reference to the accompanying drawings.

[0056] The power amplifier provided in the application embodiment is described below.

[0057] Figure 1 This illustration shows a schematic diagram of a power amplifier provided in an embodiment of this application.

[0058] like Figure 1 As shown, the power amplifier 10 provided in this application embodiment may include a power selection module 11, N power amplification modules 12 and an output matching network module 13.

[0059] The power selection module 11 may include N selection output terminals, where N≥2 and N is an integer.

[0060] N can be set according to the actual situation and is not limited here. For example, N can be 2, 3, etc.

[0061] As an example, such as Figure 2 As shown, the power selection module 11 may include two selection output terminals.

[0062] As another example, such as Figure 3 As shown, the power selection module 11 may include three selection output terminals.

[0063] N power amplifier modules 12 may include N amplification input terminals and N amplification output terminals, with each of the N amplification input terminals and N selection output terminals connected in a one-to-one correspondence.

[0064] The output matching network module is connected to all N amplified output terminals.

[0065] Understandably, each of the N power amplifier modules 12 can include one amplification input terminal and one amplification output terminal. That is, the N power amplifier modules 12 can include N amplification input terminals and N amplification output terminals.

[0066] Optionally, the output matching network module includes a matching input and a matching output. The matching input is connected to N amplified outputs, and the matching output is connected to the load.

[0067] As an example, such as Figure 2 As shown, the power amplifier 10 may include two power amplifier modules 12, each power amplifier module 12 may include one amplification input terminal and one amplification output terminal. For ease of description, the two selection output terminals are referred to as the first selection output terminal and the second selection output terminal, respectively; the two power amplifier modules 12 are referred to as the first power amplifier module and the second power amplifier module, respectively; the amplification input terminal and the amplification output terminal of the first power amplifier module are referred to as the first amplification input terminal and the first amplification output terminal, respectively; and the amplification input terminal and the amplification output terminal of the second power amplifier module are referred to as the second amplification input terminal and the second amplification output terminal, respectively. The first selection output terminal is connected to the first amplification input terminal, and the first amplification output terminal is connected to the output matching network module 13; the second selection output terminal is connected to the second amplification input terminal, and the second amplification output terminal is connected to the output matching network module 13.

[0068] As another example, such as Figure 3 As shown, the power amplifier 10 may include three power amplification modules 12, each power amplification module 12 may include one amplification input terminal and one amplification output terminal. For ease of description, the three selection output terminals are respectively referred to as the first selection output terminal, the second selection output terminal, and the third selection output terminal, and the three power amplification modules 12 are respectively referred to as the first power amplification module, the second power amplification module, and the third power amplification module. The amplification input terminal and the amplification output terminal of the first power amplification module are respectively referred to as the first amplification input terminal and the first amplification output terminal, the amplification input terminal and the amplification output terminal of the second power amplification module are respectively referred to as the second amplification input terminal and the second amplification output terminal, and the amplification input terminal and the amplification output terminal of the third power amplification module are respectively referred to as the third amplification input terminal and the third amplification output terminal. The first selection output terminal is connected to the first amplification input terminal, and the first amplification output terminal is connected to the output matching network module 13; the second selection output terminal is connected to the second amplification input terminal, and the second amplification output terminal is connected to the output matching network module 13; the third selection output terminal is connected to the third amplification input terminal, and the third amplification output terminal is connected to the output matching network module 13.

[0069] When the rated power is fully utilized, the power selection module 11 is used to select N power amplifier modules 12 to synthesize the output, and the output matching network module 13 is used to match the output impedance of the N power amplifier modules 12 to a load with a preset ohm.

[0070] Full rated power is the maximum power that a power amplifier can output under normal operating conditions.

[0071] The preset ohm can be set according to the actual situation and is not limited here. For example, the preset ohm can be 50 ohms.

[0072] As an example, such as Figure 2 As shown, under full rated power output, the power selection module 11 can select two power amplifier modules 12 to combine the output to the output matching network module 13, and the output matching network module 13 will match the output impedance of the two power amplifier modules 12 to a load with a preset ohm.

[0073] As another example, such as Figure 3 As shown, under full rated power output, the power selection module 11 can select three power amplifier modules 12 to combine the output to the output matching network module 13, and the output matching network module 13 will match the output impedance of the three power amplifier modules 12 to a load with a preset ohm.

[0074] When the power output is not at full rated power, the power selection module is used to select the output of M power amplifier modules out of N power amplifier modules, and the output matching network module is used to match the output impedance of the M power amplifier modules to a load with a preset ohm, where 1≤M<N, and M is an integer.

[0075] Non-full rated power refers to the power amplifier outputting less power than its maximum power under normal operating conditions.

[0076] M can be set according to the actual situation and is not limited here. For example, M can be 1, 2, etc.

[0077] As an example, such as Figure 2 As shown, when the power output is not at full rated power, the power selection module 11 can select any one of the two power amplifier modules 12 to output to the output matching network module 13, and the output matching network module 13 will match the output impedance of the power amplifier module 12 to a load with a preset ohm.

[0078] As another example, such as Figure 3 As shown, when the power output is not at full rated power, the power selection module 11 can select any one of the three power amplifier modules 12 to output to the output matching network module 13, and the output matching network module 13 will match the output impedance of the power amplifier module 12 to a load with a preset ohm.

[0079] As yet another example, such as Figure 3 As shown, when the power output is not at full rated power, the power selection module 11 can select any two of the three power amplifier modules 12 to combine the output to the output matching network module 13. The output matching network module 13 matches the output impedance of the two power amplifier modules 12 to a load with a preset ohm.

[0080] In this embodiment, the output matching network module can match the output impedance of N or M power amplifier modules to a load with a preset ohm, which helps to ensure the performance of the power amplifier under full rated power or non-full rated power output conditions.

[0081] To better understand the beneficial effects of the power amplifier in the embodiments of this application, as a comparative example, such as Figure 4 As shown, a power amplifier 10 in the related technology includes a driver amplifier A1, a first isolator A2, a switch A3, a power divider A3, a phase-shifting network A4, a main amplifier A5, a peak amplifier A6, a first impedance line A7, a second impedance line A8, a third impedance line A9, a second isolator A10, a diode A11, and a diode A12. Please refer to [reference needed] for the connection relationships of the above components. Figure 4 This will not be elaborated upon further. Figure 4 The power amplifier 10, when operating at full rated power, connects to the power divider A3 via control switch A3. A Doherty power amplifier module, comprising the power divider A3, phase-shifting network A4, main amplifier A5, peak amplifier A6, and first impedance line A7, amplifies the input signal and outputs it sequentially through the second impedance line A8 and the second isolator A10. When operating at less than full rated power, it connects to the third impedance line A9 via control switch A3, and then outputs through the second isolator A10. In other words, it relies entirely on the direct output of the driver stage power amplifier to improve the efficiency of the power amplifier under low load conditions.

[0082] The above method can only improve efficiency when the mobile communication base station has very low or almost no traffic. This situation accounts for a small proportion of the total working time of the mobile communication base station, and the power amplifier itself has very low output power in this case. Therefore, this method has limited effect on saving the total power consumption of the mobile communication base station.

[0083] The power amplifier provided in this application, when operating at full rated power, selects N power amplification modules to synthesize the output through a power selection module, which helps to ensure efficiency at full rated power output. When operating at less than full rated power output, it selects M power amplification modules from the N power amplification modules to output, which helps to improve efficiency at less than full rated power output.

[0084] As another comparative example, such as Figure 5As shown, another power amplifier 10 in the related technology includes a driver amplifier B1, a first transmission module B2, a first power amplifier module B3, a second transmission module B4, a second power amplifier module B5, a third transmission module B6, a third power amplifier module B7, and a control module B8. Please refer to [reference needed] for the connection relationships of the above components. Figure 5 This will not be elaborated upon further. Figure 5 The power amplifier 10 in the system selects different power amplifier modules for output based on the different traffic volumes of the base station. Specifically, taking the first power amplifier module B3 with the highest output power and the third power amplifier module B7 with the lowest output power as an example, under full rated power output, the control module B8 controls the first transmission module B2 to transmit the signal to the first power amplifier module B3; under medium output power output, the control module B8 controls the second transmission module B4 to transmit the signal to the second power amplifier module B5; and under low output power output, the control module B8 controls the third transmission module B6 to transmit the signal to the third power amplifier module B7.

[0085] While the above methods can save power consumption of mobile communication base stations, they suffer from high hardware costs and are difficult to use in practical applications.

[0086] The power amplifier provided in this application embodiment has a simple structure when N=2, that is, when the power amplifier includes two power amplification modules. This power amplifier basically borrows the structure of the balanced synthesizer in related technologies and can be implemented with only a few additional peripheral circuits. Compared with the power amplifier in another comparative example, it is beneficial to simplify the structure and reduce costs.

[0087] In one alternative implementation, such as Figure 2 and 3 As shown, the power selection module 11 includes a first switch submodule 111, a first power molecule module 112, and N second switch submodules 113.

[0088] The first switch submodule 111 includes a first A switch terminal, a second A switch terminal, and N third A switch terminals. The first A switch terminal is used to receive input signals.

[0089] For example, the first switch submodule 111 may include a switch S1.

[0090] The first power molecule module 112 includes a first power assembly terminal and N second power assembly terminals; the first power assembly terminal is connected to the second power assembly terminals.

[0091] For example, both the first power molecule module 112 and the second power molecule module 121 hereinafter may include a power divider.

[0092] The second switch submodule 113 includes a first B switch terminal, a second B switch terminal, and a third B switch terminal; the first B switch terminal is connected to the third A switch terminal, the second B switch terminal is connected to the second A power divider terminal, and the third B switch terminal is connected to the amplification input terminal.

[0093] For example, the second switch submodule 113 may include switch S2.

[0094] Understandably, the selected output terminal includes the third B switch terminal.

[0095] As an example, such as Figure 2 As shown, when N=2, the first B switch terminal of the first second switch submodule 113 is connected to the third A switch terminal of the first first switch submodule 111, the second B switch terminal of the first second switch submodule 113 is connected to the first second A power splitter terminal, and the third B switch terminal of the first second switch submodule 113 is connected to the first amplification output terminal; the first B switch terminal of the second second switch submodule 113 is connected to the third A switch terminal of the second first switch submodule 111, the second B switch terminal of the second second switch submodule 113 is connected to the second second A power splitter terminal, and the third B switch terminal of the second second switch submodule 113 is connected to the second amplification output terminal.

[0096] As another example, such as Figure 3 As shown, when N=3, the first B switch terminal of the first second switch submodule 113 is connected to the third A switch terminal of the first first switch submodule 111, the second B switch terminal of the first second switch submodule 113 is connected to the first second A power distribution terminal, and the third B switch terminal of the first second switch submodule 113 is connected to the first amplification output terminal; the first B switch terminal of the second second switch submodule 113 is connected to the third A switch terminal of the second first switch submodule 111, the second B switch terminal of the second second switch submodule 113 is connected to the second second A power distribution terminal, and the third B switch terminal of the second second switch submodule 113 is connected to the second amplification output terminal; the first B switch terminal of the third second switch submodule 113 is connected to the third A switch terminal of the third first switch submodule 111, the third B switch terminal of the third second switch submodule 113 is connected to the third second A power distribution terminal, and the third B switch terminal of the third second switch submodule 113 is connected to the third amplification output terminal.

[0097] When the rated power is fully output, the first power distribution terminal A is connected to the second power distribution terminal A, and N second power distribution terminals B are connected one-to-one with the N second power distribution terminals A, and the N second power distribution sub-modules 113 are combined to output.

[0098] Optionally, the control module can be connected to both the first switch submodule 111 and the second switch submodule 113. The control module can be used to control the first power output terminal A to connect with the second power output terminal A, and to control the N second power output terminals B to connect with the N second power output terminals A in a one-to-one correspondence when the rated power output is at full capacity.

[0099] The power amplifier may include a control module, or the power amplifier may not include a control module, but the electronic device may include a control module.

[0100] As an example, such as Figure 2 As shown, under full rated power output, the first power distribution terminal A is connected to the second power distribution terminal A, the first second power distribution terminal B is connected to the first second power distribution terminal A, and the second second power distribution terminal B is connected to the second second power distribution terminal A. The two second switch sub-modules 113 combine to output power.

[0101] As another example, such as Figure 3 As shown, under full rated power output, the first power distribution terminal A is connected to the second power distribution terminal A, the first second power distribution terminal B is connected to the first second power distribution terminal A, the second second power distribution terminal B is connected to the second second power distribution terminal A, and the third second power distribution terminal B is connected to the third second power distribution terminal A. The three second switch sub-modules 113 are combined for output.

[0102] When the power output is not at full rated power, M first B switches are connected to M third A switches in a one-to-one correspondence, and (NM) first B switches are connected to (NM) second A power distribution terminals in a one-to-one correspondence.

[0103] Optionally, the control module can also be used to control the M first B switches to be connected one-to-one with the M third A switches, and to control the (NM) first B switches to be connected one-to-one with the (NM) second A power distribution terminals when the output power is not at full rated power.

[0104] As an example, such as Figure 2 As shown, under non-full rated power output conditions, the first first B switch terminal is connected to the first third A switch terminal, and the second first B switch terminal is connected to the second second A power distribution terminal.

[0105] As another example, such as Figure 3 As shown, under non-full rated power output conditions, the first first B switch terminal is connected to the first third A switch terminal, the second first B switch terminal is connected to the second second A power distribution terminal, and the third first B switch terminal is connected to the third second A power distribution terminal.

[0106] As yet another example, such as Figure 3As shown, under non-full rated power output conditions, the first first B switch terminal is connected to the first third A switch, the second first B switch terminal is connected to the second third A switch, and the third first B switch terminal is connected to the third second A power distribution terminal.

[0107] In one alternative implementation, the power amplifier module 12 includes a second power molecule module 121, a phase-shifting network submodule 122, a main amplifier 123, a peak amplifier 124, a sixth impedance transformation line 125, and a seventh impedance transformation line 126.

[0108] The second power module 121 includes a first power output terminal, a second power output terminal, and a third power output terminal, with the first power output terminal correspondingly connected to the selected output terminal.

[0109] As an example, such as Figure 2 As shown, the first power input terminal of the second power input module 121 in the first power amplifier module 12 is connected to the first selection output terminal, which is also connected to the third power input terminal of the first switch S2; the first power input terminal of the second power input module 121 in the second power amplifier module 12 is connected to the second selection output terminal, which is also connected to the third power input terminal of the second switch S2.

[0110] As another example, such as Figure 3 As shown, the first power input terminal of the second power input module 121 in the first power amplifier module 12 is connected to the first selection output terminal, which is also connected to the third power input terminal of the first switch S2; the first power input terminal of the second power input module 121 in the second power amplifier module 12 is connected to the second selection output terminal, which is also connected to the third power input terminal of the second switch S2; the first power input terminal of the second power input module 121 in the third power amplifier module 12 is connected to the third selection output terminal, which is also connected to the third power input terminal of the third switch S2.

[0111] like Figure 2 and Figure 3 As shown, the second power divider terminal is connected to the output matching network module 13 in sequence through the main amplifier 123, the sixth impedance transformation line 125 and the seventh impedance transformation line 126.

[0112] The third power divider terminal is connected to the fifth node Q5 via the phase-shifting network submodule 122 and the peak amplifier 124. The fifth node Q5 is located between the sixth impedance transformation line 125 and the seventh impedance transformation line 126.

[0113] The phase-shifting network submodule 122 is used to provide a phase delay at a preset angle. The preset angle can be set according to actual conditions and is not limited here. For example, the preset angle can be 90°.

[0114] The control module can also be connected to N power amplifier modules 12.

[0115] Understandably, the fifth node Q5 can also be the second combining point. The N seventh impedance transformation lines 126 are connected to the output matching network module 13 through the first combining point K1.

[0116] In one optional embodiment, the electrical length of the sixth impedance transformation line 125 is a6, and the electrical length of the seventh impedance transformation line 127 is a7, where a6 = a7.

[0117] For example, a6 = a7 = λ / 4. Here, λ / 4 can represent 1 / 4 of the wavelength of the electromagnetic wave. When the electromagnetic wave passes through an impedance transformation line with an electrical length of λ / 4, a phase delay can occur, causing the phase of the output signal of the impedance transformation line to change by 90° relative to the input signal of the impedance transformation line.

[0118] like Figure 2 As shown, under full rated power output, the impedance of the first fifth node Q5 is ZL8, the impedance of the second fifth node Q5 is ZL9, and the impedance of the first combining point K1 is ZL10. The impedance of the first fifth node Q5, ZL8, is transformed into impedance (Z1) through the first sixth impedance transformation line 125 of λ / 4. 2 / (ZL8), the impedance ZL9 of the second fifth node Q5, is transformed into impedance (Z2) through the second sixth impedance transformation line 125 of λ / 4. 2 / (ZL9). The impedance ZL10 at the first merging point K1 can satisfy...

[0119] When the power output is not at full rated power, the main amplifier 123 of the (NM) power amplifier modules 12 is biased in Class C. The impedance from the fifth node Q5 of these power amplifier modules 12 to the main amplifier 123 is short-circuited, and the impedance from the seventh impedance transformation line 126 of these power amplifier modules 12 to the first combining point K1 is open-circuited. That is, the (NM) power amplifier modules 12 do not output impedance to the first combining point K1. At this time, the output matching network module 13 will output impedance (Z1). 2 / (ZL8) is transformed into the load impedance ZL, thereby ensuring that the M power amplifier modules 12 meet the output impedance requirements for normal operation.

[0120] In one alternative implementation, such as Figure 6 As shown, the output matching network module 13 may include a first impedance transformation line 131, a second impedance transformation line 132, a third impedance transformation line 133, a fourth impedance transformation line 134, a fifth impedance transformation line 135, a first diode 136, and a second diode 137.

[0121] The first impedance transformation line 131 connects to N amplification output terminals through the first junction point K1;

[0122] The second impedance transformation line 132 and the third impedance transformation line 133 are connected in series between the first node Q1 and the ground terminal GND. The first node Q1 is located between the first confluence point K1 and the first impedance transformation line 131.

[0123] The first diode 136 is connected between the second node Q2 and the ground terminal GND. The second node Q2 is located between the second impedance transformation line 132 and the third impedance transformation line 133.

[0124] The fourth impedance transformation line 134 and the fifth impedance transformation line 135 are connected in series between the third node Q3 and the ground terminal GND. The third node Q3 is located between the first impedance transformation line 131 and the load.

[0125] The second diode 137 is connected between the fourth node Q4 and the ground terminal GND. The fourth node Q4 is located between the fourth impedance transformation line 134 and the fifth impedance transformation line 135.

[0126] When the rated power is fully output, both the first diode 136 and the second diode 137 are in an open circuit state, and the first impedance transformation line 131 matches the output impedance of the N power amplifier modules 12 to a load with a preset ohm.

[0127] When the power output is not at full rated power, both the first diode 136 and the second diode 137 are in a short-circuit state, and the second impedance transformation line 132 and the fifth impedance transformation line 135 match the output impedance of the M power amplifier modules 12 to the load of preset ohms.

[0128] The control module can be connected to the output matching network 13. The control module can be used to control the first diode 136 and the second diode 137 to be in an open circuit state when the rated power output is full; the control module can also be used to control the first diode 136 and the second diode 137 to be in a short circuit state when the rated power output is not full.

[0129] In one optional embodiment, the electrical length of the first impedance transformation line 131 is a1, the electrical length of the second impedance transformation line 132 is a2, the electrical length of the third impedance transformation line 133 is a3, the electrical length of the fourth impedance transformation line 134 is a4, and the electrical length of the fifth impedance transformation line 135 is a5; a1 = a2 + a3 = a4 + a5. That is, the electrical lengths of the first impedance transformation line 131 to the fifth impedance transformation line 135 are all equal.

[0130] In some alternative embodiments, the electrical length of at least one of the first impedance transformation lines 131 to the fifth impedance transformation line 135 may be different from the electrical length of the other impedance transformation lines.

[0131] Optionally, a1 = a2 + a3 = a4 + a5 = λ / 4. That is, the electrical length of the first impedance transformation line 131, the sum of the electrical lengths of the second impedance transformation line 132 and the third impedance transformation line 133, and the sum of the electrical lengths of the fourth impedance transformation line 132 and the fifth impedance transformation line 133 are all λ / 4. Of course, other values ​​besides λ / 4 are also possible and are not limited here.

[0132] In one optional embodiment, the impedance of the second impedance transformation line 132 is ZL2, the impedance of the third impedance transformation line 133 is ZL3, the impedance of the fourth impedance transformation line 134 is ZL4, and the impedance of the fifth impedance transformation line 135 is ZL5; ZL2 = ZL3, ZL4 = ZL5. That is, the impedance of the second impedance transformation line 132 is equal to the impedance of the third impedance transformation line 133, and the impedance of the fourth impedance transformation line 134 is equal to the impedance of the fifth impedance transformation line 135. This facilitates the calculation of the impedance of the first combining point K1 and the impedance of the first impedance transformation line 131.

[0133] In some alternative embodiments, the impedance of the second impedance transformation line 132 may not be equal to the impedance of the third impedance transformation line 133, and the impedance of the fourth impedance transformation line 134 may not be equal to the impedance of the fifth impedance transformation line 135.

[0134] For example, ZL8 = ZL9 = 25 ohms, Z1 = Z2 = 35.35 ohms, ZL = 50 ohms, a2 + a3 = a4 + a5 = λ / 4, then ZL10 = 25 ohms, and the impedance ZL1 of the first impedance transformation line 131 is 35.35 ohms.

[0135] When the rated power is fully output, both the first diode 136 and the second diode are in an open circuit state. Since a2+a3=a4+a5=λ / 4, the second impedance transformation line 132, the third impedance transformation line 133, the fourth impedance transformation line 134 and the fifth impedance transformation line 135 do not participate in the output impedance matching. The first impedance transformation line 131 matches the output impedance of the first combining point K1 to a load with a 50-ohm impedance.

[0136] When the output power is not at full rated power, both the first diode 136 and the second diode are in a short-circuit state. The second impedance transformation line 132 and the fourth impedance transformation line 134 are equivalent to a short-circuit stub. By selecting appropriate electrical lengths a2 and a4, the output matching network can complete the load matching from the 25-ohm impedance at the first junction point K1 to the 50-ohm impedance, thereby ensuring the load impedance required for the normal operation of a power amplifier module 12.

[0137] like Figure 7 As shown, Figure 7 The impedance transformation of the second and fourth impedance transformation lines is shown when the electrical lengths of both lines are 45°. Figure 7 In the diagram, X1 represents the impedance transformation curve of the second impedance transformation line, X2 represents the impedance transformation curve of the fourth impedance transformation line, X3 represents the impedance transformation curve of the first impedance transformation line, the hollow circle represents the first junction point, the hollow quadrilateral represents the load, the straight line passing through the hollow point represents the reflection coefficient, and the arcs other than X1, X2 and X3 represent curves with equal impedance.

[0138] It is understood that the power amplifier provided in this application embodiment can be based on a balanced combiner amplifier structure, utilizing the open-short-circuit characteristics of the Doherty amplifier output combiner point, to achieve multiple Doherty combined outputs or a single Doherty output. The open-short-circuit characteristics of the output combiner point refer to the amplifier's operating state and performance when an open circuit or short circuit occurs at the output combiner point.

[0139] Based on the same inventive concept, embodiments of this application also provide an electronic device. For example... Figure 8 As shown, the electronic device 100 provided in this application embodiment includes the power amplifier 10 and load 20 in any of the above embodiments, with the power amplifier 10 connected to the load 20.

[0140] Optionally, the power amplifier 10 includes an output matching network module connected to the load 20.

[0141] The load setting of 20 ohms can be a preset load. The preset ohms can be set according to actual conditions and is not limited here. For example, the preset ohms can be 50 ohms.

[0142] It is understood that the electronic device has the beneficial effects of the power amplifier provided in the embodiments of this application. For details, please refer to the specific description of the power amplifier in the above embodiments. This embodiment will not repeat the description here.

[0143] It should be noted that in the embodiments shown in the figures above, the resistor is presented as a single resistor. In other embodiments, the resistor may be an integrated combination of series, parallel, or mixed resistors. The specific parameters of each device can be set according to actual needs, and this application does not limit this.

[0144] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0145] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A power amplifier, characterized in that, include: The power selection module includes N selection output terminals, where N≥2 and N is an integer; N power amplifier modules, including N amplification input terminals and N amplification output terminals, wherein the N amplification input terminals are connected one-to-one with the N selected output terminals; The output matching network module is connected to all N amplified output terminals; When the rated power is fully utilized, the power selection module is used to select the N power amplifier modules to synthesize the output, and the output matching network module is used to match the output impedance of the N power amplifier modules to a load with a preset ohm. In the case of non-full rated power output, the power selection module is used to select M power amplifier modules out of the N power amplifier modules for output, and the output matching network module is used to match the output impedance of the M power amplifier modules to the load of the preset ohms, 1≤M<N, and M is an integer; The power selection module includes a first switch submodule, a first power molecule module, and N second switch submodules; The first switch submodule includes a first A switch terminal, a second A switch terminal, and N third A switch terminals. The first A switch terminal is used to receive input signals. The first power molecule module includes a first power assembly terminal and N second power assembly terminals; the first power assembly terminal is connected to the second power assembly terminals; The second switch submodule includes a first B switch terminal, a second B switch terminal, and a third B switch terminal; the first B switch terminal is connected to the third A switch terminal, the second B switch terminal is connected to the second A power divider terminal, and the third B switch terminal is connected to the amplification input terminal. When the rated power is fully output, the first power distribution terminal A is connected to the second power distribution terminal A, and N second power distribution terminals B are connected one-to-one with the N second power distribution terminals A, and the N second switch sub-modules are combined for output. When the power output is not at full rated power, M of the first B switches are connected to M of the third A switches in a one-to-one correspondence, and (NM) of the first B switches are connected to (NM) of the second A power distribution terminals in a one-to-one correspondence.

2. The power amplifier according to claim 1, characterized in that, The output matching network module includes a first impedance transformation line, a second impedance transformation line, a third impedance transformation line, a fourth impedance transformation line, a fifth impedance transformation line, a first diode, and a second diode; The first impedance transformation line is connected to the N amplification output terminals through the first combining point; The second impedance transformation line and the third impedance transformation line are connected in series between the first node and the ground terminal, and the first node is located between the first junction point and the first impedance transformation line; The first diode is connected between the second node and the ground terminal, and the second node is located between the second impedance transformation line and the third impedance transformation line; The fourth impedance transformation line and the fifth impedance transformation line are connected in series between the third node and the grounding terminal, and the third node is located between the first impedance transformation line and the load. The second diode is connected between the fourth node and the ground terminal, and the fourth node is located between the fourth impedance transformation line and the fifth impedance transformation line; When the rated power is fully output, both the first diode and the second diode are in an open circuit state, and the first impedance transformation line matches the output impedance of the N power amplifier modules to a load of a preset ohm. When the power output is not at full rated power, both the first diode and the second diode are in a short-circuit state, and the second impedance transformation line and the fifth impedance transformation line match the output impedance of the M power amplifier modules to the load with the preset ohm.

3. The power amplifier according to claim 2, characterized in that, The electrical length of the first impedance transformation line is a1, the electrical length of the second impedance transformation line is a2, the electrical length of the third impedance transformation line is a3, the electrical length of the fourth impedance transformation line is a4, and the electrical length of the fifth impedance transformation line is a5. a1 = a2 + a3 = a4 + a5.

4. The power amplifier according to claim 3, characterized in that, a1=a2+a3=a4+a5=λ / 4; λ / 4 represents 1 / 4 of the wavelength of electromagnetic waves.

5. The power amplifier according to claim 2, characterized in that, The impedance of the second impedance transformation line is ZL2, the impedance of the third impedance transformation line is ZL3, the impedance of the fourth impedance transformation line is ZL4, and the impedance of the fifth impedance transformation line is ZL5. ZL2=ZL3, ZL4=ZL5.

6. The power amplifier according to any one of claims 1 to 5, characterized in that, The power amplifier module includes a second power molecule module, a phase-shifting network submodule, a main amplifier, a peak amplifier, a sixth impedance transformation line, and a seventh impedance transformation line; The second power molecule module includes a first power byte terminal, a second power byte terminal, and a third power byte terminal, with the first power byte terminal correspondingly connected to the selected output terminal; The second power divider terminal is connected to the output matching network module in sequence through the main amplifier, the sixth impedance transformation line, and the seventh impedance transformation line; The third power divider terminal is connected to the fifth node in sequence through the phase shifting network submodule and the peak amplifier. The fifth node is located between the sixth impedance transformation line and the seventh impedance transformation line. The phase-shifting network submodule is used to provide a phase delay at a preset angle.

7. The power amplifier according to claim 6, characterized in that, The electrical length of the sixth impedance transformation line is a6, and the electrical length of the seventh impedance transformation line is a7, where a6 = a7.

8. The power amplifier according to claim 7, characterized in that, a6=a7=λ / 4; λ / 4 represents 1 / 4 of the wavelength of electromagnetic waves.

9. An electronic device, characterized in that, It includes the power amplifier and load as described in any one of claims 1-8, wherein the power amplifier is connected to the load.

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