Power amplifier assembly, remote radio unit, and communication device and method

Abstract

A power amplifier assembly, a remote radio unit, and a communication device and method. The power amplifier assembly (200) comprises a combiner (210) and a plurality of power amplifiers (220a, and 220b_1-220b_M). An output end of a power amplifier (220a) is connected to an isolation port (Ia) of the combiner (210), and the power amplifier serves as a main path of the power amplifier assembly (200), where a load impedance is constant, and good wideband characteristics are achieved. Output ends of the remaining power amplifiers (220b_1-220b_M) are connected to input ports (Ib_1-Ib_M) of the combiner (210), and the remaining power amplifiers serve as an auxiliary path of the power amplifier assembly (200). Moreover, the plurality of power amplifiers (220a, and 220b_1-220b_M) include at least one first power amplifier (310), wherein the first power amplifier (310) is provided with a main amplifier (M), an auxiliary amplifier (P) and a power synthesis assembly. When the first power amplifier (310) operates, since the main amplifier (M) and the auxiliary amplifier (P) are provided, a plurality of high-efficiency points can appear successively, thereby not only increasing a back-off amount, but also alleviating the efficiency dip problem in the case of a large back-off range, thus improving the efficiency of the overall power amplifier assembly (200).

Description

Power amplifier assembly, radio remote unit, communication device and method

[0001] Cross Reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411110341.4, filed on August 13, 2024, and entitled “A Power Amplifier Assembly, Radio Remote Unit, Communication Device and Method”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a power amplifier assembly, a radio remote unit, a communication device and a method. BACKGROUND

[0004] A power amplifier (PA) is an important component in a communication device, which can amplify the power of a radio frequency signal to achieve sufficient radio frequency power. Currently, in order to amplify the radio frequency signal without distortion, a power backoff method is usually adopted. Although the circuit architecture of a Doherty power amplifier can improve the backoff efficiency, it will cause a problem of efficiency dip between the backoff point and the saturation point in the power backoff range, thereby reducing the overall efficiency of the power amplifier. SUMMARY

[0005] Embodiments of the present application provide a power amplifier assembly, a radio remote unit, a communication device and a method, which can improve the problem of efficiency dip in the power backoff range and improve the overall efficiency of the power amplifier assembly on the basis of ensuring that the power amplifier assembly has good bandwidth characteristics and a large power backoff amount.

[0006] In a first aspect, the embodiments of the present application provide a power amplifier assembly, which can include a combiner and a plurality of power amplifiers. The input ends of the plurality of power amplifiers are configured to receive radio frequency signals. The output ends of some of the plurality of power amplifiers are connected to the isolation ports of the combiner, and the output ends of the remaining power amplifiers are connected to the input ports of the combiner. The output port of the combiner is configured to output the radio frequency signals. In this way, when the power amplifier assembly is in operation, the radio frequency signals are sent to the combiner after being amplified by the plurality of power amplifiers. The combiner combines the received radio frequency signals into one radio frequency signal and then outputs the radio frequency signal. The power amplifiers connected to the isolation ports of the combiner serve as the main path of the power amplifier assembly, and the power amplifiers connected to the input ports of the combiner serve as the auxiliary path of the power amplifier assembly. Since the output ends of the power amplifiers serving as the main path are connected to the isolation ports of the combiner, the load impedance of the power amplifiers is constant, so that the power amplifier assembly can have good broadband characteristics.

[0007] In addition, the plurality of power amplifiers can include at least one first power amplifier, and the first power amplifier is provided with a main amplifier, an auxiliary amplifier, and a power combining assembly. The input ends of the main amplifier and the auxiliary amplifier are configured to receive radio frequency signals with different phases, respectively. The output ends of the main amplifier and the auxiliary amplifier are connected to the combiner through the power combining assembly, so that the radio frequency signals output by the main amplifier and the auxiliary amplifier are combined into one radio frequency signal by the power combining assembly and then sent to the combiner. In this way, when the power amplifier with the first power amplifier architecture is in operation, the main amplifier serves as the main path of the power amplifier and the auxiliary amplifier serves as the auxiliary path of the power amplifier. Therefore, the main amplifier operates first, and the first high-efficiency point appears when the main amplifier reaches saturation. Then, the auxiliary amplifier starts to operate, and the second high-efficiency point appears when the auxiliary amplifier reaches saturation. Based on this, the power amplifier assembly in the embodiments of the present application can have multiple high-efficiency points in succession during the process of increasing the output power, which can not only improve the backoff amount but also improve the efficiency dip problem in the large backoff range and improve the overall efficiency of the power amplifier assembly.

[0008] In some embodiments, the power amplifier connected to the isolation port of the combiner can be the first power amplifier. In this way, not only good broadband characteristics can be ensured, but also the backoff amount of power backoff and the efficiency in the small output power range can be improved.

[0009] In some embodiments, the combiner can have at least one input port, and the power amplifier connected to the at least one input port comprises a first power amplifier, i.e. the power amplifier connected to the at least one input port is also configured as the first power amplifier, so that multiple high-efficiency points can occur successively in the process of increasing the output power, not only the backoff amount can be improved, but also the efficiency dip problem in the large backoff range can be improved, and the efficiency of the overall power amplifier assembly can be improved.

[0010] In some embodiments, the combiner can have at least one input port, and the power amplifier connected to the at least one input port comprises a single-tube power amplifier, i.e. the power amplifier connected to the at least one input port is also configured as the single-tube power amplifier, so that the complexity of the structure of the power amplifier assembly is reduced.

[0011] In some embodiments, the combiner can have at least one input port, and the power amplifier connected to the at least one input port comprises multiple single-tube power amplifiers, and the multiple single-tube power amplifiers are used to work simultaneously, so that the power amplifier assembly has been implemented by using a high-efficiency circuit architecture.

[0012] In some embodiments, the power amplifier connected to the isolation port of the combiner comprises a single-tube power amplifier, i.e. the power amplifier connected to the isolation port of the combiner is configured as a single-tube power amplifier, so that the complexity of the structure of the power amplifier assembly is reduced.

[0013] In some embodiments, the power amplifier connected to the isolation port of the combiner comprises multiple single-tube power amplifiers, and the multiple single-tube power amplifiers are used to work simultaneously, so that the power amplifier assembly has been implemented by using a high-efficiency circuit architecture.

[0014] In some embodiments, the combiner has at least one input port, and the power amplifier connected to the at least one input port is a first power amplifier. Thus, not only is it beneficial to increase the backoff amount of the power amplifier assembly, but also the efficiency in the medium and high power range can be improved, and the efficiency dip can be improved.

[0015] Exemplarily, the power amplifier with multiple single-tube power amplifiers comprises, but is not limited to, a Silonex power amplifier.

[0016] Exemplarily, the first power amplifier can include one main amplifier and one or more auxiliary amplifiers. For example, the first power amplifier can include a 2-way (or also 3-way, 4-way, 5-way or more) Doherty power amplifier, a 2-tube CLMA power amplifier, a 3-tube LMBA power amplifier, etc. Among them, the 2-way (or also 3-way, 4-way, 5-way or more) Doherty power amplifier can be a traditional high-efficiency circuit architecture, or a new high-efficiency circuit architecture (such as NXP architecture). Exemplarily, the Doherty power amplifier can be a Doherty power amplifier based on microstrip line combination, or also a Doherty power amplifier based on bridge combination, or also a Doherty power amplifier based on balun combination.

[0017] In some embodiments, the combiner is a first bridge, the combiner has two input ports, one input port of the combiner is a first balanced port of the first bridge, another input port of the combiner is a second balanced port of the first bridge, the isolation port of the combiner is an isolation port of the first bridge, and the output port of the combiner is an output port of the first bridge. Thus, the combiner can be implemented by using the first bridge, and since the architecture of the first bridge is relatively mature, the combiner can be relatively simple to implement, thereby reducing design difficulty and production cost. Exemplarily, the first bridge can be a 3dB bridge or a 5dB bridge.

[0018] In some embodiments, the combiner is a circulator, the combiner includes one input port, the input port of the combiner is an input port of the circulator, the isolation port of the combiner is an isolation port of the circulator, and the output port of the combiner is an output port of the circulator. Thus, the combiner can be implemented by using the circulator, and since the architecture of the circulator is relatively mature, the combiner can be relatively simple to implement, thereby reducing design difficulty and production cost.

[0019] In some embodiments, the combiner is a combination circuit, the combination circuit has one isolation port, one output port and at least one input port, the isolation port of the combination circuit is the isolation port of the combiner, the input port of the combination circuit is the input port of the combiner, and the output port of the combination circuit is the output port of the combiner. Moreover, the combination circuit can be a circuit formed by series and parallel connection of at least one element based on microstrip line, capacitance and resistance.

[0020] In some embodiments, the power amplifier assembly can further include a plurality of driving units, driving input ends of the plurality of driving units being configured to receive the radio frequency signal, driving output ends of the plurality of driving units being correspondingly connected to the input ends of the plurality of power amplifiers, the plurality of driving units being respectively configured to amplify and output the received radio frequency signal to meet the requirement of the input power of the power amplifier and increase the link gain. The driving unit connected to the first power amplifier can be a first driving unit, the first driving unit having a plurality of different driving output ends, the input end of the main amplifier and the input end of the auxiliary amplifier being respectively connected to different driving output ends. In this way, the radio frequency signal can be first amplified by the first driving unit and then output to the main amplifier and the auxiliary amplifier in the first power amplifier to meet the requirement of the input power of the main amplifier and the auxiliary amplifier in the first power amplifier and increase the link gain. In addition, the first driving unit can also have the function of adjusting the phase of the radio frequency signal to adjust the relationship between the phase and the amplitude of the radio frequency signal required by the first power amplifier and then output to the main amplifier and the auxiliary amplifier in the first power amplifier.

[0021] In some embodiments, the first driving unit can have a plurality of different driving input ends, and the first driving unit can include a plurality of first driving branches, each first driving branch including a driving amplifier and an impedance matching circuit, the output end of the driving amplifier being connected to the input end of the impedance matching circuit. In addition, the input end of the driving amplifier in one first driving branch is one driving input end, and the output end of the impedance matching circuit in one first driving branch is one driving output end. In this way, the use of one first driving branch to drive one main amplifier or one auxiliary amplifier can effectively improve the gain of the main amplifier and the auxiliary amplifier and improve the efficiency of the link. In addition, the driving amplifier and the main amplifier or the auxiliary amplifier are connected through the impedance matching circuit to achieve impedance matching.

[0022] In some embodiments, the first driving unit can also have one driving input end, and the first driving unit can include a driving amplifier and a power distribution assembly, the output end of the driving amplifier being connected to the input end of the power distribution assembly. In addition, the input end of the driving amplifier is the driving input end of the first driving unit, the power distribution assembly has a plurality of different output ends, one output end of the power distribution assembly is one driving output end, and the power distribution assembly is configured to divide the radio frequency signal output by the driving amplifier into a plurality of radio frequency signals and output through different output ends. In this way, one driving amplifier and a power distribution assembly can be used to drive the main amplifier and the auxiliary amplifier, which is beneficial to saving area.

[0023] Exemplarily, the impedance matching circuit in the first driving unit can be composed of one or more discrete elements of capacitance, inductance, resistance, microstrip line, etc., or the impedance matching circuit in the first driving unit can also be an integrated IPD chip circuit, to realize the fundamental wave and harmonic wave matching of the driving amplifier output to the main amplifier input or the auxiliary amplifier input.

[0024] Exemplarily, the first driving unit and the first power amplifier connected thereto can be a separate power amplifier package device, or a power amplifier die without packaging.

[0025] Exemplarily, the driving amplifier can be a single-tube power amplifier, or the driving amplifier can also be a Doherty power amplifier or other high-efficiency circuit architecture, to improve the driving efficiency and improve the link efficiency.

[0026] In some embodiments, the power amplifiers other than the first power amplifier among the plurality of power amplifiers are set as a second power amplifier, and the driving unit connected to the second power amplifier is set as a second driving unit, which can be designed according to the specific structure of the second power amplifier.

[0027] In some examples, the second power amplifier can be set as a single-tube power amplifier, and the second driving unit has one driving input end and one driving output end, wherein the second driving unit includes a driving amplifier and an impedance matching circuit, and the output end of the driving amplifier and the input end of the impedance matching circuit are connected. Moreover, the input end of the driving amplifier is the driving input end of the second driving unit, and the output end of the impedance matching circuit is the driving output end of the second driving unit. By such setting, the gain of the single-tube power amplifier can be effectively improved, and the efficiency of the link can be improved. Moreover, the driving amplifier and the single-tube power amplifier are connected by the impedance matching circuit to realize impedance matching.

[0028] In some examples, the second power amplifier can be provided with multiple single-tube power amplifiers, the second driving unit can have different multiple driving input terminals and different multiple driving output terminals, the second driving unit can include multiple second driving branches, each second driving branch can include a driving amplifier and an impedance matching circuit, and the output terminal of the driving amplifier and the input terminal of the impedance matching circuit can be connected. Moreover, the input terminal of the driving amplifier in one second driving branch can be one driving input terminal of the second driving unit, and the output terminal of the impedance matching circuit in one second driving branch can be one driving output terminal of the second driving unit. In this way, the gain of the single-tube power amplifier can be effectively improved, and the efficiency of the link can be improved by using one second driving branch to drive one single-tube power amplifier. Moreover, the driving amplifier and the single-tube power amplifier can be connected through the impedance matching circuit to achieve impedance matching.

[0029] In some examples, the second power amplifier can also be provided with multiple single-tube power amplifiers, the second driving unit can have one driving input terminal and different multiple driving output terminals, the second driving unit can include a driving amplifier and a power distribution component, and the output terminal of the driving amplifier and the input terminal of the power distribution component can be connected. Moreover, the input terminal of the driving amplifier can be the driving input terminal of the second driving unit, the power distribution component can have different multiple output terminals, one output terminal of the power distribution component can be one driving output terminal of the second driving unit, and the power distribution component can be used to divide the radio frequency signal output by the driving amplifier into multiple radio frequency signals and output through different output terminals. In this way, one driving amplifier and the power distribution component can be used to drive the main amplifier and the auxiliary amplifier, which is beneficial to saving area.

[0030] In some embodiments, the power amplifier component can further include a first signal decomposition circuit, the input terminal of the first signal decomposition circuit can be used to receive a radio frequency signal, and the output terminal of the first signal decomposition circuit can be connected to at least part of the driving input terminals of the driving unit. Moreover, the total number of the radio frequency signals received by the first signal decomposition circuit can be less than the total number of the radio frequency signals received by the power unit connected thereto, and the first signal decomposition circuit can be used to output multiple radio frequency signals after decomposing the received radio frequency signal. In this way, it is beneficial to reduce the cost and complexity of the link. Moreover, the first signal decomposition circuit outputs multiple radio frequency signals with different amplitudes and phases, which can achieve the desired combiner isolation function and implement the efficient working mode of the entire power amplifier component.

[0031] In some embodiments, the driving unit connected to the first signal decomposition circuit can be connected to the power amplifier connected to the input port of the combiner. In this way, the driving unit input required radio frequency signals corresponding to the input port of the combiner can be based on the signal decomposition mode of the first signal decomposition circuit.

[0032] In some embodiments, the combiner can have two input ports, and the driving units connected to the first signal decomposition circuit can have one driving input port respectively. Based on this, the first signal decomposition circuit can include a second bridge, a first balanced port of the second bridge is used to receive the radio frequency signal, a second balanced port of the second bridge is grounded, an isolation port of the second bridge is connected to one driving input port, and an output port of the second bridge is connected to another driving input port. In this way, the first signal decomposition circuit can be implemented by using a second bridge, which can reduce the design difficulty and production cost. Exemplarily, the second bridge can be a 3dB bridge or a 5dB bridge with a characteristic impedance of 50 ohms.

[0033] In some embodiments, the combiner can have two input ports, and the driving units connected to the power amplifiers connected to each input port of the combiner can have two driving input ports respectively. Based on this, the first signal decomposition circuit can include a first third bridge, a second third bridge, and a third third bridge, wherein a first balanced port of the first third bridge is used to receive the radio frequency signal, a second balanced port of the first third bridge is grounded, an isolation port of the first third bridge is connected to a first balanced port of the second third bridge, and an output port of the first third bridge is connected to a first balanced port of the third third bridge. A second balanced port of the second third bridge is grounded, and an isolation port and an output port of the second third bridge are connected to two driving input ports of one driving unit respectively. A second balanced port of the third third bridge is grounded, and an isolation port and an output port of the third third bridge are connected to two driving input ports of another driving unit respectively. In this way, the first signal decomposition circuit can be implemented by using three third bridges in cascade, and since the architecture of the third bridge is relatively mature, the first signal decomposition circuit can be relatively simple to implement, thereby reducing the design difficulty and production cost. Exemplarily, each third bridge can be a 3dB bridge or a 5dB bridge with a specific impedance of 50 ohms.

[0034] In some embodiments, the driving units connected to the power amplifiers connected to the isolation ports of the combiner can also have different multiple driving input ports. Based on this, the power amplifier assembly can further include a first signal synthesis circuit, an input end of the first signal synthesis circuit is connected to the multiple driving input ports respectively, an output end of the first signal synthesis circuit is connected to an input end of the first signal decomposition circuit, and the first signal synthesis circuit is used to synthesize and output the received radio frequency signal. In this way, the number of link channels can be reduced, which is beneficial to saving the link cost and area.

[0035] Exemplarily, the first signal synthesis circuit can include a plurality of fourth bridges, for example, the first signal synthesis circuit includes three fourth bridges: a first fourth bridge, a second fourth bridge, a third fourth bridge and a microstrip line, the first balanced port and the isolation port of the first fourth bridge are connected with one driving input end, the second balanced port of the first fourth bridge is grounded, and the output port of the first fourth bridge is connected with the first balanced port of the third fourth bridge through the microstrip line. The first balanced port of the second fourth bridge is grounded, the second balanced port and the output port of the second fourth bridge are connected with another driving input end, and the second balanced port of the second fourth bridge is connected with the second balanced port of the third fourth bridge. The isolation port of the third fourth bridge is grounded, and the output port of the third fourth bridge is connected with the input end of the first signal decomposition circuit. In this way, the first signal synthesis circuit is composed of the fourth bridges and the microstrip line, which can make the first signal synthesis circuit relatively simple to implement, thereby reducing the design difficulty and the production cost.

[0036] In some embodiments, the power amplifier connected with the isolation port of the combiner can be set as a first power amplifier, and the first driving unit corresponding to the first power amplifier connected with the isolation port of the combiner has at least three driving output ends. Based on this, the power amplifier assembly can further include a second signal decomposition circuit, the input end of the second signal decomposition circuit is used to receive the radio frequency signal, the output end of the second signal decomposition circuit is connected with at least two driving input ends of the at least three driving output ends, and the second signal decomposition circuit is used to output a plurality of radio frequency signals after decomposing the received radio frequency signal, which is conducive to reducing the link cost and complexity.

[0037] Exemplarily, the second signal decomposition circuit can include a seventh bridge, the first balanced port of the seventh bridge is used to receive the radio frequency signal, the second balanced port of the seventh bridge is grounded, the isolation port of the seventh bridge is connected with one driving input end, and the output port of the seventh bridge is connected with another driving input end. In this way, the second signal decomposition circuit can be implemented by using the seventh bridge, which reduces the design difficulty and the production cost.

[0038] In some embodiments, the combiner includes one input port, and the driving unit corresponding to the power amplifier connected with the input port of the combiner has one driving input end. Based on this, the power amplifier assembly further includes a second signal synthesis circuit, the input end of the second signal synthesis circuit is connected with the input end of the second signal decomposition circuit and the driving input end other than the at least two driving input ends of the at least three driving output ends, respectively, the output end of the signal synthesis circuit is connected with the driving input end of the driving unit corresponding to the power amplifier connected with the input port of the combiner, and the second signal synthesis circuit is used to output after synthesizing the received radio frequency signal, which can reduce the number of link channels and is conducive to saving the link cost and area.

[0039] Exemplarily, the second signal synthesis circuit can include a plurality of ninth bridges, for example, the second signal synthesis circuit can include three ninth bridges: a first ninth bridge, a second ninth bridge, a third ninth bridge and a microstrip line, the first balanced port and the isolation port of the first ninth bridge are connected with one driving input end, the second balanced port of the first ninth bridge is grounded, and the output port of the first ninth bridge is connected with the first balanced port of the third ninth bridge through the microstrip line. The first balanced port of the second ninth bridge is grounded, the second balanced port and the output port of the second ninth bridge are connected with another driving input end, and the second balanced port of the second ninth bridge is connected with the second balanced port of the third ninth bridge. The isolation port of the third ninth bridge is grounded, and the output port of the third ninth bridge is connected with the input end of the first signal decomposition circuit. Thus, the second signal synthesis circuit is composed of the ninth bridge and the microstrip line, which can make the second signal synthesis circuit relatively simple to implement, thereby reducing the design difficulty and reducing the production cost.

[0040] In a second aspect, the embodiments of the present application further provide a method for power amplification by using the power amplifier assembly in the first aspect or the embodiments of the first aspect, which comprises: outputting the power amplified radio frequency signal by the combiner after the power amplification by each power amplifier. Wherein, when the first power amplifier performs power amplification, the main amplifier performs power amplification first, and the auxiliary amplifier performs power amplification later. Thus, in the process of increasing the output power, multiple high-efficiency points can appear in succession, which can not only improve the backoff amount, but also improve the efficiency pit problem in the large backoff range and improve the efficiency of the overall power amplifier assembly.

[0041] In a third aspect, the embodiments of the present application further provide a radio remote unit, which comprises: a communication interface, a filter and a power amplifier assembly, the input ends of the plurality of power amplifiers in the power amplifier assembly are connected with the communication interface, and the output end of the power amplifier assembly is connected with the input end of the filter. Wherein, the power amplifier assembly is the power amplifier assembly in the first aspect or the embodiments of the first aspect. Since the power amplifier assembly can improve the efficiency pit problem existing in the large power backoff range on the basis of ensuring that the power amplifier assembly has good bandwidth characteristics and large power backoff amount, and improve the efficiency of the overall power amplifier assembly, the efficiency of the radio remote unit containing the power amplifier assembly in the embodiments of the present application can be improved.

[0042] Fourthly, embodiments of this application also provide a communication device, which includes a baseband unit and a radio frequency (RF) remote unit connected to the baseband unit. The RF remote unit is the RF remote unit described in the second aspect or other embodiments of the second aspect. Since the RF remote unit includes the power amplifier component described in the embodiments of this application, its efficiency can be improved; therefore, the efficiency of the communication device including the RF remote unit described in the embodiments of this application can also be improved. Attached Figure Description

[0043] Figure 1 is a schematic diagram of a base station structure in an embodiment of this application;

[0044] Figure 2 is a schematic diagram of a radio frequency remote unit in an embodiment of this application;

[0045] Figure 3 is a schematic diagram of a power amplifier assembly in an embodiment of this application;

[0046] Figure 4 is a schematic diagram of a first power amplifier in an embodiment of this application;

[0047] Figure 5 is a schematic diagram of the relationship curve between output power and efficiency in an embodiment of this application;

[0048] Figure 6 is a schematic diagram of a circuit structure of a power amplifier assembly in an embodiment of this application;

[0049] Figure 7 is another schematic diagram of the relationship between output power and efficiency in an embodiment of this application;

[0050] Figure 8 is a schematic diagram of another circuit structure of the power amplifier assembly in the embodiments of this application;

[0051] Figure 9 is a schematic diagram of another circuit structure of the power amplifier assembly in an embodiment of this application;

[0052] Figure 10 is a schematic diagram of another circuit structure of the power amplifier assembly in an embodiment of this application;

[0053] Figure 11 is a schematic diagram of a circuit structure of the first signal synthesis circuit in an embodiment of this application;

[0054] Figure 12 is a schematic diagram of another circuit structure of the power amplifier assembly in an embodiment of this application;

[0055] Figure 13 is a schematic diagram of another circuit structure of the power amplifier assembly in an embodiment of this application;

[0056] Figure 14a is a schematic diagram of another circuit structure of the power amplifier assembly in an embodiment of this application;

[0057] Fig. 14b is another schematic view of the relationship between output power and efficiency in the embodiment of the present application;

[0058] Fig. 15 is another schematic view of the circuit structure of the power amplifier assembly in the embodiment of the present application;

[0059] Fig. 16a is another schematic view of the circuit structure of the power amplifier assembly in the embodiment of the present application;

[0060] Fig. 16b is another schematic view of the relationship between output power and efficiency in the embodiment of the present application;

[0061] Fig. 17 is another schematic view of the circuit structure of the power amplifier assembly in the embodiment of the present application;

[0062] Fig. 18 is another schematic view of the circuit structure of the power amplifier assembly in the embodiment of the present application;

[0063] Fig. 19 is another schematic view of the circuit structure of the power amplifier assembly in the embodiment of the present application;

[0064] Fig. 20 is a schematic view of the circuit structure of the second signal synthesis circuit in the embodiment of the present application;

[0065] Fig. 21 is another schematic view of the circuit structure of the power amplifier assembly in the embodiment of the present application. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be described in further detail below with reference to the drawings. The specific operation method in the method embodiment can also be applied to the device embodiment or the system embodiment. It should be noted that in the description of the present application, "a plurality of" can be understood as "at least two". In addition, it should be understood that in the description of the present application, "first", "second", etc. are used only for distinguishing purposes of description, and cannot be understood as indicating or implying relative importance, nor can it be understood as indicating or implying order.

[0067] It should be noted that the same reference signs in the drawings of the present application represent the same or similar structures, and thus repeated description thereof will be omitted. The expressions of position and direction described in the present application are described with reference to the drawings, but changes can also be made as needed, and the changes made are all included in the protection scope of the present application. The drawings of the present application are only used to show the relative position relationship and do not represent the true proportion.

[0068] The schemes described in the embodiments of the present application can be used in various communication devices, such as a second generation (2G) communication system, a third generation (3G) communication system, a long term evolution (LTE) system, or a fifth generation (5G) communication system, a future communication network system, and more possible communication systems.

[0069] The power amplifier assembly provided by the embodiments of the present application can be integrated in any communication device that needs to amplify the power of a wireless signal, such as a base station. The power amplifier assembly provided by the embodiments of the present application can work in the radio frequency part of the communication device, such as a radio remote unit (RRU) of the base station. The base station is a device deployed in a wireless access network to provide wireless communication functions for terminals. The base station can include various forms of macro base stations, micro base stations, relay stations, access points, and the like. When different communication systems are used, the names of devices with base station functions may be different, such as evolved NodeB (eNB or eNodeB) in an LTE communication system, NodeB in a 3G communication system, Base Station (BS) in a 2G communication system, and the like. Or similar devices in more possible future communication systems. In the following, the structure of the communication device is described by taking the base station as an example.

[0070] For example, the power amplifier assembly provided by the embodiments of the present application can be integrated in at least one chip, such as an application-specific integrated circuit (ASIC). The power amplifier assembly can also be composed of at least one discrete device. The power amplifier assembly can also be a chip system that includes at least one chip and at least one discrete device. The specific implementation form of the power amplifier assembly is not limited in the present application.

[0071] Fig. 1 is a structural schematic diagram of a base station in an embodiment of the present application. Referring to Fig. 1, the base station 1 can include a baseband unit (BBU) 11, a radio remote unit (RRU) 12, and an antenna system 13. The radio remote unit 12 can be directly or indirectly connected to the baseband unit 11. For example, the radio remote unit 12 can be connected to the baseband unit 11 through optical fiber, twisted pair, or the like. Moreover, the radio remote unit 12 is connected to the antenna system 13 through an external interface. In an example, in operation, the baseband unit 11 outputs a radio frequency signal to the radio remote unit 12. The transmission link in the radio remote unit 12 processes the radio frequency signal and sends it to the antenna system 13. The antenna system 13 transmits the radio frequency signal, thereby completing the transmission of the radio frequency signal. Alternatively, the antenna system 13 receives a radio frequency signal and sends it to the radio remote unit 12. The radio remote unit 12 processes the radio frequency signal and sends it to the baseband unit 11, thereby completing the reception of the radio frequency signal.

[0072] Fig. 2 is a structural schematic diagram of a radio remote unit in an embodiment of the present application. Referring to Fig. 2, the radio remote unit 12 can include a communication interface, a radio frequency transceiver unit, a power amplification unit, and a filter. The radio frequency transceiver unit can include a transmitter TXA. The power amplification unit can include a power amplifier assembly. The communication interface is connected to the baseband unit 11 and is also connected to the input end of the transmitter TXA. The output end of the transmitter TXA is connected to the input end of the power amplifier assembly. The output end of the power amplifier assembly is connected to the filter. The filter is also connected to the antenna system 13. Based on this, in operation, a radio frequency signal is input through the communication port, and is input to the power amplifier assembly through the transmitter TXA. The power amplifier assembly amplifies the small power signal output by the transmitter TXA to the required large power radio frequency signal, and sends it to the antenna system 13 through the filter after filtering, so as to be transmitted through the antenna system 13, thereby completing the transmission of the radio frequency signal.

[0073] Moreover, the radio frequency transceiver unit can also include receivers RXA and RXB. The power amplification unit can also include low noise amplifiers (LNAs). The input end of the LNA is connected to the filter. The output end of one LNA is connected to the input end of the receiver RXA. The output end of another LNA is connected to the input end of the receiver RXB. The output ends of the receivers RXA and RXB are connected to the communication interface. Based on this, in operation, the antenna system 13 receives a radio frequency signal and sends it to the filter. After filtering by the filter, the radio frequency signal is sent to the LNAs. After amplification and processing by the LNAs, the radio frequency signal is sent to the receivers RXA and RXB. The radio frequency signal is sent to the communication interface through the receivers RXA and RXB, so as to be sent to the baseband unit 11 through the communication interface.

[0074] Exemplarily, the communication interface can include, but is not limited to, a high-speed interface module, and the filter can include, but is not limited to, a diplexer.

[0075] Exemplarily, the radio remote unit 12 can further include a power module, which can supply power to the radio transceiver unit, the power amplifier unit, and the filter.

[0076] Exemplarily, the radio remote unit 12 can further include an expansion interface, which can be used to connect various external devices.

[0077] It is worth mentioning that those skilled in the art can understand that the hardware structure of the radio remote unit 12 shown in FIG. 2 does not constitute a limitation on the radio remote unit 12, and the radio remote unit 12 provided in the embodiments of the present application can include more or fewer components than those shown, can combine two or more components, or can have a different component configuration. The various components shown in FIG. 2 can be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application-specific integrated circuits. In addition, one or more of the components shown in FIG. 2 can be disposed on a printed circuit board (PCB).

[0078] Generally, a power amplifier assembly needs to consider multiple frequency bands (such as 758-960 MHz, 1.8+2.1 GHz, 1.8+2.1+2.6 GHz) in design, so that the power amplifier assembly has good wideband characteristics. Moreover, due to the scarcity of spectrum resources, in order to improve the utilization efficiency of spectrum, communication devices adopt various different modulation signals, such as orthogonal frequency division multiplexing (OFDM), code division multiple access (CDMA), time division multiple access (TDMA), etc., according to the relevant protocol provisions, these signals of different modulation modes have different peak-to-average power ratios (PAPR). In order not to distort the amplification of these signals, the power amplifier assembly usually adopts the power backoff method. Although a larger power backoff range can be achieved as the power backoff amount of the power amplifier assembly increases, a larger power backoff range will cause a efficiency dip problem between the backoff point and the saturation point, thereby reducing the overall efficiency of the power amplifier assembly.

[0079] To solve the above problems, the embodiment of the present application provides a power amplifier assembly, which can improve the efficiency dip problem existing in a large power backoff range and improve the overall efficiency of the power amplifier assembly on the basis of ensuring that the power amplifier assembly has good bandwidth characteristics and a large power backoff amount.

[0080] Figure 3 is a structural schematic diagram of a power amplifier assembly in the embodiment of the present application. Referring to Figure 3, the power amplifier assembly 200 provided by the embodiment of the present application can include a combiner 210 and a plurality of power amplifiers 220 a , 220 b_1 , 220 b_M (M is an integer and M≥1), wherein the combiner 210 can have an isolation port I a and input ports I b_1 -I b_M , the input ends of the plurality of power amplifiers 220 a , 220 b_1 , 220 b_M serve as the input ends of the power amplifier assembly 200 and are used to receive a radio frequency signal Rf in , wherein the output end of the power amplifier 220 a is connected with the isolation port I a of the combiner 210, the output ends of the remaining power amplifiers 220 b_1 , 220 b_M are connected with the input ports I b_1 -I b_M of the combiner 210 in correspondence, and the output port I c of the combiner 210 serves as the output end of the power amplifier assembly and is used to output the radio frequency signal Rf out . Thus, when the power amplifier assembly 200 works, the radio frequency signal Rf in is sent to the combiner 210 after being power amplified by the power amplifiers 220 a , 220 b_1 , 220 b_M , the combiner 210 combines the received radio frequency signals into one radio frequency signal Rf out and then outputs the radio frequency signal through the output port of the combiner 210. Moreover, the power amplifier 220 a is connected with the isolation port I a of the combiner 210, so that the power amplifier 220 a serves as the main path (main) of the entire power amplifier assembly 200, and the remaining power amplifiers 220 b_1 , 220 b_M serve as the auxiliary paths (peak), and the output end of the power amplifier 220 a serving as the main path is connected with the isolation port Ia Therefore, its load impedance is constant, allowing the power amplifier assembly 200 to have good broadband characteristics. Furthermore, when the power amplifier assembly 200 is operating, when the output port I of the combiner 210... c When the output power is low, only the power amplifier 220 a Work. With the increase in output efficiency, the power amplifier 220... a After reaching saturation, the power amplifier 220 b_1 ~220 b_M The corresponding work begins. Understandably, the power amplifier 220 in Figure 3... a 220 b_1 ~220 b_M The radio frequency signals received at the input terminal all use Rf in This is for illustrative purposes only and does not represent the power amplifier 220. a 220 b_1 ~220 b_M The RF signals received at the input terminals are the same; therefore, in practical applications, the power amplifier 220... a 220 b_1 ~220 b_M The amplitude and phase of the radio frequency signal received at the input terminal can be designed according to the actual application requirements, and this application does not limit them.

[0081] Figure 4 is a schematic diagram of a first power amplifier in an embodiment of this application. Referring to Figure 4, the above-mentioned multiple power amplifiers 220 can be configured to... a 220 b_1 ~220 b_M At least one of them is configured as a first power amplifier 310, and the first power amplifier 310 is provided with a main amplifier M, an auxiliary amplifier P and a power combining component, and the input terminal of the main amplifier M receives the radio frequency signal Rf. in_1 The input terminal of the auxiliary amplifier P receives the radio frequency signal Rf. in_2 Radio frequency signal Rf in_1 and radio frequency signal Rf in_2the output end of the main amplifier M and the output end of the auxiliary amplifier P are connected with the combiner 210 through the power combining component, so that the radio frequency signals output by the main amplifier M and the auxiliary amplifier P are combined into one path by the power combining component and then sent to the combiner 210. Thus, when the power amplifier assembly 200 is working, the power amplifier with the first power amplifier 310 architecture works as follows: because the main amplifier and the auxiliary amplifier are arranged in the power amplifier, the main amplifier serves as the main path of the power amplifier, and the auxiliary amplifier serves as the auxiliary path of the power amplifier. Therefore, the main amplifier works first, and the first high-efficiency point appears when the main amplifier reaches saturation. Then, the auxiliary amplifier starts to work, and the second high-efficiency point appears when the auxiliary amplifier reaches saturation. Based on this, compared with the power amplifier assembly in the prior art, the power amplifier assembly in the embodiment of the present application can successively have multiple high-efficiency points in the process of increasing the output power, which not only improves the backoff amount but also improves the efficiency dip problem in the large backoff range and improves the efficiency of the overall power amplifier assembly.

[0082] For example, in the schematic diagram of the relationship between the output power and the efficiency shown in FIG. 5, the dashed line represents the relationship between the output power and the efficiency corresponding to the power amplifier assembly in the prior art, and the solid line represents the relationship between the output power and the efficiency corresponding to the power amplifier assembly in the embodiment of the present application. The power amplifier assembly in the prior art has the efficiency dip between the backoff point and the saturation point in the large backoff range of -15 dB to 0 dB. However, the power amplifier assembly in the embodiment of the present application can successively have multiple high-efficiency points in the process of increasing the output power, which can improve the efficiency dip problem and improve the efficiency of the overall power amplifier assembly on the basis of ensuring the large backoff range of -15 dB to 0 dB.

[0083] The structure and working process of the power amplifier assembly provided in the embodiment of the present application will be described in detail below in combination with specific embodiments. It can be understood that the following embodiments are only illustrative of the specific structure of the power amplifier assembly, and the specific structure of the power amplifier assembly is not limited to the following structure provided in the embodiment of the present application, but can also be other structures known by those skilled in the art based on the same concept, which is not limited herein.

[0084] Embodiment one,

[0085] FIG. 6 is a schematic diagram of a circuit structure of the power amplifier assembly in the embodiment of the present application. Referring to FIG. 6, the isolation port I a The power amplifier 220 a comprises two single-tube power amplifiers D a_1 and D a_2 Thus, the power amplifier 220a The high-efficiency circuit architecture is adopted to ensure good broadband characteristics. Moreover, the power amplifier 220 a works in the time domain, and the input end of the single-tube power amplifier D a_1 receives the radio frequency signal Rf ina_1 , the input end of the single-tube power amplifier D a_2 receives the radio frequency signal Rf ina_2 , the phases of the radio frequency signals Rf ina_1 and Rf ina_2 are different, the two single-tube power amplifiers D a_1 and D a_2 can work simultaneously to amplify and output the radio frequency signals Rf ina_1 and Rf ina_2 , so that the first high-efficiency point can appear as the output power increases. Exemplarily, the power amplifier 220 a may further include a power synthesis component 311 a_1 , the single-tube power amplifiers D a_1 and D a_2 are connected to the isolation port I a of the combiner 210 through the power synthesis component, so that the radio frequency signals output by the single-tube power amplifiers D a_1 and D a_2 are combined into one through the power synthesis component and then sent to the isolation port I a of the combiner 210. It is worth mentioning that the power amplifier 220 a may further include three, four or more single-tube power amplifiers, and the single-tube power amplifiers can work simultaneously, so that the power amplifier 220 a is formed by adopting the high-efficiency circuit architecture, and the gain and output power of the overall power amplifier assembly are improved.

[0086] Exemplarily, the power synthesis component in the power amplifier 220 a may include microstrip lines 411 a_1 and 411 a_2 , the output end of the single-tube power amplifier D a_1 is connected to the first end of the microstrip line 411 a_1 , the output end of the single-tube power amplifier D a_2 is connected to the first end of the microstrip line 411 a_2 , the second end of the microstrip line 411 a_1 is connected to the second end of the microstrip line 411 a_2 and the isolation port I a of the combiner 210. Moreover, the phase of the microstrip line 411 a_1 is (λ / 4)+δ, and the phase of the microstrip line 411 a_2the phase of the two RF signals Rf a The high-efficiency circuit architecture of the chireix power amplifier is adopted to realize the power amplifier 220a, and the chireix power amplifier architecture is relatively mature, so that the power amplifier 220a can be relatively simple to realize, thereby reducing the design difficulty and reducing the production cost.

[0087] In some embodiments, the power amplifier connected to the isolation port of the combiner 210 can also include three, four or more single-tube power amplifiers, which are used to work simultaneously, and the specific embodiments can refer to the chireix power amplifier, which will not be repeated here. In some embodiments, the power amplifier connected to the isolation port of the combiner 210 can also be a single-tube power amplifier, which is not limited in the present application.

[0088] In some embodiments, referring to FIG. 6, the combiner 210 can have two input ports I b_1 and I b_2 , the input port I b_1 is connected to the power amplifier 220 b_1 , and the input port I b_2 is connected to the power amplifier 220 b_2 . And the power amplifiers 220 b_1 and 220 b_2 can be set as the first power amplifier, so that in the process of increasing the output power, multiple high-efficiency points can be sequentially appeared based on the combination of the power amplifier 220 a and the power amplifier 220 b_1 and 220 b_2 , not only the backoff amount can be improved, but also the efficiency pit problem in the large backoff range can be improved, and the efficiency of the overall power amplifier assembly can be improved.

[0089] Exemplarily, referring to FIG. 6, the power amplifier 220 b_1 may include a main amplifier M b_1 , an auxiliary amplifier P b_1 and a power synthesis assembly 311 b_1 , the input end of the main amplifier M b_1 receives a radio frequency signal Rf inb_1 , the input end of the auxiliary amplifier P b_1 receives a radio frequency signal Rf inb_2 , and the phases of the radio frequency signal Rf inb_1 and the radio frequency signal Rf inb_2 are different. And the output end of the main amplifier M b_1 and the output end of the auxiliary amplifier P b_1 are connected to the input port I b_1 of the combiner 210 through the power synthesis assembly.The main amplifier M b_1 and the auxiliary amplifier P b_1 output radio frequency signals are combined by the power combining component into one path and then sent to the input port I b_1 of the combiner 210. b_1 The high-efficiency circuit architecture of the first power amplifier is formed, so that the main amplifier M b_1 serves as the main path in the power amplifier 220 b_1 and the auxiliary amplifier P b_1 serves as the auxiliary path in the power amplifier 220 b_1 . Therefore, when the power amplifier 220 b_1 is working, the main amplifier M b_1 works first, and as the output power increases, the main amplifier M b_1 reaches saturation, and the auxiliary amplifier P b_1 begins to work. Based on this, not only is it beneficial to increase the backoff amount of the power amplifier component 200, but also the efficiency in the medium and high power range can be improved, and the efficiency dip can be improved.

[0090] In some examples, referring to FIG. 6, the power combining component 311 b_1 may include a microstrip line 411 b_1 , and the phase of the microstrip line 411 b_1 is λ / 4, that is, the microstrip line 411 b_1 is a λ / 4 microstrip line. In this way, the power amplifier 220 b_1 can be implemented using a high-efficiency circuit architecture of a two-way Doherty power amplifier based on microstrip line combining. Moreover, since the two-way Doherty power amplifier architecture based on microstrip line combining is relatively mature, the power amplifier 220 b_1 is relatively simple to implement, thereby reducing design difficulty and production cost. In addition, when the power amplifier 220 b_1 is implemented using a high-efficiency circuit architecture of a two-way Doherty power amplifier, the phases of the radio frequency signals Rf inb_1 and Rf inb_2 may differ by 90 degrees.

[0091] In other examples, the power combining component 311 b_1 may also include a bridge or a balun, so that the two-way Doherty power amplifier can also be a two-way Doherty power amplifier based on bridge or balun combining. In addition, the power amplifier 220 b_1 may also include multiple auxiliary amplifiers, so that the power amplifier 220 b_1The high-efficiency circuit architecture is implemented by a 3-way (or 4-way, 5-way or more) Doherty power amplifier based on microstrip line (or bridge or balun) combining, and the 3-way (or 4-way, 5-way or more) Doherty power amplifier can be a traditional high-efficiency circuit architecture or a new high-efficiency circuit architecture (such as NXP architecture).

[0092] In some examples, the power combining component 311 b_1 may also include a circulator, and the output end of the main amplifier is connected to the isolation port of the circulator, and the output end of the auxiliary amplifier is connected to the input port of the circulator, so that the power amplifier 220 b_1 is implemented by a 2-tube CLMA power amplifier based on circulator combining. Moreover, since the 2-tube CLMA power amplifier architecture is relatively mature, the power amplifier 220 b_1 is relatively simple to implement, thereby reducing design difficulty and production cost.

[0093] In yet some examples, the power combining component 311 b_1 may also include a bridge (such as a 3dB bridge or a 5dB bridge), and the output end of the main amplifier is connected to the isolation port of the bridge, and the power amplifier 220 b_1 has two auxiliary amplifiers, and the first balanced port of the bridge is connected to the output end of one auxiliary amplifier, and the second balanced port of the bridge is connected to the output end of the other auxiliary amplifier, so that the power amplifier 220 b_1 is implemented by a 3-tube load-modulated balanced amplifier (LMBA) based on bridge combining. Moreover, since the 3-tube LMBA power amplifier architecture is relatively mature, the power amplifier 220 b_1 is relatively simple to implement, thereby reducing design difficulty and production cost.

[0094] Exemplarily, referring to FIG. 6, the power amplifier 220 b_2 may also include a main amplifier M b_2 , an auxiliary amplifier P b_2 and a power combining component 311 b_2 . The input end of the main amplifier M b_2 receives a radio frequency signal Rf inb_3 , the input end of the auxiliary amplifier P b_2 receives a radio frequency signal Rf inb_4 , the radio frequency signal Rf inb_3 and the radio frequency signal Rf inb_4 have different phases. Moreover, the output end of the main amplifier M b_2 and the output end of the auxiliary amplifier P b_2The output end of the power combining component 311 b_2 is connected with the input port I of the combiner 210 b_2 , so that the main amplifier M b_2 and the auxiliary amplifier P b_2 output the radio frequency signal to the input port I of the combiner 210 b_2 after power combination. b_2 Thus, the power amplifier 220 b_2 adopts the high-efficiency circuit architecture of the first power amplifier, so that the main amplifier M b_2 serves as the main path in the power amplifier 220 b_2 , and the auxiliary amplifier P b_2 serves as the auxiliary path in the power amplifier 220 b_2 . Therefore, when the power amplifier 220 b_2 works, the main amplifier M b_2 works first, and when the output power increases, the auxiliary amplifier P b_2 starts to work after the main amplifier M b_2 reaches saturation. Based on this, not only the backoff amount of the power amplifier component 200 can be increased, but also the efficiency in the medium and high power range can be improved, and the efficiency dip can be improved.

[0095] In some examples, referring to FIG. 6, the power combining component 311 b_2 may include a microstrip line 411 b_2 , and the phase of the microstrip line 411 b_2 is λ / 4, that is, the microstrip line 411 b_2 is a λ / 4 microstrip line. Thus, the power amplifier 220 b_2 adopts the high-efficiency circuit architecture of the 2-way Doherty power amplifier based on microstrip line combination. Moreover, since the 2-way Doherty power amplifier based on microstrip line combination is relatively mature, the power amplifier 220 b_2 is relatively simple to implement, thereby reducing the design difficulty and the production cost. In addition, when the power amplifier 220 b_2 adopts the high-efficiency circuit architecture of the 2-way Doherty power amplifier, the phases of the radio frequency signal Rf inb_3 and the radio frequency signal Rf inb_4 may be 90 degrees.

[0096] In other examples, the power combining component 311 b_2 may also include a bridge or a balun, so that the 2-way Doherty power amplifier can also be a 2-way Doherty power amplifier based on bridge or balun combination. In addition, the power amplifier 220 b_2 may also include multiple auxiliary amplifiers, so that the power amplifier 220 b_2The 3-way (or 4-way, 5-way or more) Doherty power amplifier based on the microstrip line (or bridge or balun) combining can be implemented by a high-efficiency circuit architecture, and the 3-way (or 4-way, 5-way or more) Doherty power amplifier can be a traditional high-efficiency circuit architecture or a new high-efficiency circuit architecture.

[0097] In some examples, the power combining component 311 b_2 may also include a circulator, and the output end of the main amplifier is connected to the isolation port of the circulator, and the output end of the auxiliary amplifier is connected to the input port of the circulator, so that the power amplifier 220 b_2 is implemented by a 2-tube CLMA power amplifier based on the circulator combining. Moreover, since the 2-tube CLMA power amplifier architecture is relatively mature, the power amplifier 220 b_2 is relatively simple to implement, thereby reducing the design difficulty and production cost.

[0098] In yet some examples, the power combining component 311 b_2 may also include a bridge (for example, a 3dB bridge or a 5dB bridge), and the output end of the main amplifier is connected to the isolation port of the bridge, and the power amplifier 220 b_2 has two auxiliary amplifiers, and the first balanced port of the bridge is connected to the output end of one auxiliary amplifier, and the second balanced port of the bridge is connected to the output end of the other auxiliary amplifier, so that the power amplifier 220 b_2 is implemented by a 3-tube LMBA based on the bridge combining. Moreover, since the 3-tube LMBA power amplifier architecture is relatively mature, the power amplifier 220 b_2 is relatively simple to implement, thereby reducing the design difficulty and production cost.

[0099] Exemplarily, referring to FIG. 6, the combiner 210 can be set as a first bridge TA, wherein one input port I b_1 of the combiner 210 is a first balanced port of the first bridge TA, and the output end of the main amplifier M b_1 and the output end of the auxiliary amplifier P b_1 in the power amplifier 220 b_1 are connected to the first balanced port of the first bridge TA through the power combining component 311 b_1 . Moreover, the other input port I b_2 of the combiner 210 is a second balanced port of the first bridge TA, and the output end of the main amplifier M b_2 and the output end of the auxiliary amplifier P b_2 in the power amplifier 220 b_2 are connected to the second balanced port of the first bridge TA through the power combining component 311 b_2is connected with the second balanced port of the first bridge TA. And, the output port I of the combiner 210 c is an output port of the first bridge TA. In this way, the combiner 210 can be implemented by using the first bridge TA, and since the architecture of the first bridge TA is relatively mature, the combiner 210 can be relatively simple to implement, thereby reducing the design difficulty and reducing the production cost. Exemplarily, the first bridge TA can be a 3dB bridge or a 5dB bridge.

[0100] In some embodiments, the power amplifiers 220 b_1 and 220 b_2 can be implemented by using the same high-efficiency circuit architecture, for example, referring to FIG. 6, the power amplifiers 220 b_1 and 220 b_2 are both implemented by using a 2-way Doherty power amplifier based on a microstrip line combiner, which can reduce the design difficulty and the manufacturing difficulty of the power amplifiers 220 b_1 and 220 b_2 . And, by configuring a suitable radio frequency signal, the isolation characteristic of the isolation port of the first bridge TA can be achieved. Of course, in specific implementation, the power amplifiers 220 b_1 and 220 b_2 may also be implemented by using different high-efficiency circuit architectures, for example, the power amplifier 220 b_1 is implemented by using a 2-tube CLMA power amplifier architecture, and the power amplifier 220 b_2 is implemented by using a 2-way Doherty power amplifier architecture, and thus the present application does not make any limitation in this regard.

[0101] In some embodiments, the single-tube power amplifiers D a_1 and D a_2 , the main amplifiers M b_1 and M b_2 , and the auxiliary amplifiers P b_1 and P b_2 may be implemented by using the same architecture or may be implemented by using different architectures, and the present application does not make any limitation in this regard.

[0102] The working principle will be described below by taking the structure of the power amplifier assembly shown in FIG. 6 as an example and by referring to the schematic diagram of the relationship curve between the output power and the efficiency shown in FIG. 7. In FIG. 7, the dashed line represents the relationship curve between the output power and the efficiency corresponding to the power amplifier assembly in the prior art, and the solid line represents the relationship curve between the output power and the efficiency corresponding to the power amplifier assembly in the embodiments of the present application.

[0103] In the working of the power amplifier assembly 200, the radio frequency signal Rf ina_1 is amplified by the power amplifiers D a_1 , and the radio frequency signal Rfina_2 through the power amplifier D a_2 power amplification, and through the power combining component 311 a_1 after combining, into the isolated port of the first bridge TA. The radio frequency signal Rf inb_1 through the main amplifier M b_1 power amplification, the radio frequency signal Rf inb_2 through the auxiliary amplifier P b_1 power amplification, and through the power combining component 311 b_1 after combining, into the first balanced port of the first bridge TA. The radio frequency signal Rf inb_3 through the main amplifier M b_2 power amplification, the radio frequency signal Rf inb_4 through the auxiliary amplifier P b_2 power amplification, and through the power combining component 311 b_2 after combining, into the second balanced port of the first bridge TA, through which the first bridge TA outputs the radio frequency signal Rf out . And the single-tube power amplifier D a_1 and D a_2 are biased as class AB, the main amplifier M b_1 and M b_2 are biased as the same light class C, the auxiliary amplifier P b_1 and P b_2 are biased as the same deep class C. When the input radio frequency signal Rf ina_1 ~Rf inb_4 is small, the main amplifier M b_1 and M b_2 and the auxiliary amplifier P b_1 and P b_2 are all in the off state, the single-tube power amplifier D a_1 and D a_2 work, through scanning the amplitude and phase of the radio frequency signal Rf ina_1 and Rf ina_2 , the single-tube power amplifier D a_1 and D a_2 impedance-draw each other, reach voltage saturation, and all work in a high-efficiency state, thereby a first high-efficiency interval appears with the increase of output power. When the input radio frequency signal Rf ina_1 ~Rf inb_4 continues to increase, the main amplifier M b_1 and M b_2 are simultaneously turned on, and since the main amplifier M b_1 and M b_2 are connected to work, the output efficiency first decreases and then increases, and when the main amplifier M b_1 and M b_2 also reach voltage saturation, the single-tube power amplifier D a_1and D a_2 and main amplifier M b_1 and M b_2 all work in high efficiency state, so that a second high efficiency point appears with the increase of output power. When the input radio frequency signal Rf ina_1 ~Rf inb_4 power continues to increase, auxiliary amplifier P b_1 and P b_2 are simultaneously turned on and work, and the output efficiency first decreases and then increases, and finally the single tube power amplifier D a_1 and D a_2 , main amplifier M b_1 and M b_2 , and auxiliary amplifier P b_1 and P b_2 all work in high efficiency state, so that a third high efficiency point appears with the increase of output power, and the maximum power output is realized. And, when the single tube power amplifier D a_1 and D a_2 reaches the saturation start, the power amplifier assembly is always in high efficiency state, and high efficiency in a large backoff power interval is realized. And, on the basis of ensuring a large backoff range of-15dB~0dB, the efficiency pit problem can be improved, and the overall efficiency of the power amplifier assembly is improved.

[0104] Embodiment two,

[0105] Fig. 8 is another circuit structure schematic diagram of the power amplifier assembly in the embodiment of the application. Referring to Fig. 8, the embodiment is a transformation of the implementation manner in the embodiment one. Only the difference between the embodiment and the embodiment one will be described below, and the same parts will not be described here.

[0106] In some embodiments, referring to Fig. 8, the power amplifier assembly provided by the embodiment of the application can further include a plurality of driving units (for example, 230 a , 230 b_1 and 230 b_2 ), the driving input ends of the plurality of driving units (for example, 230 a , 230 b_1 and 230 b_2 ) are used to receive radio frequency signals, and the driving output ends of the plurality of driving units (for example, 230 a , 230 b_1 and 230 b_2 ) are connected with the input ends of the plurality of power amplifiers (for example, 220 a , 220 b_1 and 220 b_2 ) in correspondence. And, the plurality of driving units (for example, 230 a , 230 b_1 and 230b_2 ) can be used to amplify the received radio frequency signal and output, to meet the requirements of power amplifier (for example 220 a , 220 b_1 and 220 b_2 ) to the input power, increase the link gain.

[0107] The driving unit connected with the first power amplifier is set as the first driving unit, the first driving unit can have different multiple driving output terminals, and the input terminals of the main amplifier and the auxiliary amplifier in the first power amplifier are connected with different driving output terminals. Thus, the radio frequency signal can be first amplified by the first driving unit and then output to the main amplifier and the auxiliary amplifier in the first power amplifier, to meet the requirements of the main amplifier and the auxiliary amplifier in the first power amplifier to the input power, increase the link gain. Moreover, the first driving unit can also have the function of adjusting the phase of the radio frequency signal, to adjust the relationship between the phase and the amplitude of the radio frequency signal required by the first power amplifier, and then output to the main amplifier and the auxiliary amplifier in the first power amplifier. Hereinafter, the first driving unit having different multiple driving input terminals and the first driving unit including multiple first driving branches are taken as examples for illustration.

[0108] Exemplarily, referring to FIG. 8, the power amplifier 220 b_1 is the first power amplifier, and the power amplifier 220 b_1 is connected with the driving unit 230 b_1 , the driving unit 230 b_1 is the first driving unit. Moreover, the driving unit 230 b_1 may include two first driving branches, one of which includes a driving amplifier Q b_1 and an impedance matching circuit Z b_1 , the input terminal of the driving amplifier Q b_1 serves as a driving input terminal of the driving unit 230 b_1 , and the input terminal of the driving amplifier Q b_1 is used to receive the radio frequency signal Rf inb1_1 , the output terminal of the driving amplifier Q b_1 is connected with the input terminal of the impedance matching circuit Z b_1 , the output terminal of the impedance matching circuit Z b_1 serves as a driving output terminal of the driving unit 230 b_1 , and the output terminal of the impedance matching circuit Z b_1 is connected with the input terminal of the main amplifier M b_1 , so that the radio frequency signal Rf b_1 can be first power amplified by the driving amplifier Q inb1_1 into the radio frequency signal Rf inb_1and impedance matching circuit Z b_1 output to main amplifier M b_1 . And, another one of the first drive branches includes drive amplifier Q b_2 and impedance matching circuit Z b_2 , the input end of drive amplifier Q b_2 serves as another drive input end of drive unit 230 b_2 , and the input end of drive amplifier Q b_2 is used to receive radio frequency signal Rf inb1_2 , the output end of drive amplifier Q b_2 is connected with the input end of impedance matching circuit Z b_2 , the output end of impedance matching circuit Z b_2 serves as another drive output end of drive unit 230 b_2 , and the output end of impedance matching circuit Z b_2 is connected with the input end of auxiliary amplifier P b_1 , so that radio frequency signal Rf b_2 can be first power amplified by drive amplifier Q inb1_2 into radio frequency signal Rf inb_2 , and then output to auxiliary amplifier P b_2 through impedance matching circuit Z b_1 . Wherein, drive amplifiers Q b_1 and Q b_2 may be single-tube power amplifiers, or drive amplifiers Q b_1 and Q b_2 may be Doherty power amplifiers and other high-efficiency circuit architectures.

[0109] Power amplifier 220 b_2 is a first power amplifier, and power amplifier 220 b_2 is connected with drive unit 230 b_2 , so drive unit 230 b_2 is a first drive unit. And, drive unit 230 b_2 may include two first drive branches, one of which includes drive amplifier Q b_3 and impedance matching circuit Z b_3 , the input end of drive amplifier Q b_3 serves as one drive input end of drive unit 230 b_2 , and the input end of drive amplifier Q b_3 is used to receive radio frequency signal Rf inb1_3 , the output end of drive amplifier Q b_3 is connected with the input end of impedance matching circuit Z b_3 , the output end of impedance matching circuit Z b_3 serves as one drive output end of drive unit 230b_2 One of the drive output terminals, and the impedance matching circuit Z b_3 The output terminal is connected to the main amplifier M b_2 The input terminal is connected, so that it can drive amplifier Q. b_3 First, the radio frequency signal Rf inb1_3 Power amplification into radio frequency signal Rf inb_3 Then, it passes through the impedance matching circuit Z. b_3 Output to main amplifier M b_2 Furthermore, another first drive branch includes a drive amplifier Q. b_4 and impedance matching circuit Z b_4 , drive amplifier Q b_4 The input terminal serves as the driver unit 230 b_2 The other drive input terminal, and the drive amplifier Q b_4 The input terminal is used to receive radio frequency signal Rf inb1_4 , drive amplifier Q b_4 The output terminal and impedance matching circuit Z b_4 The input terminal is connected to the impedance matching circuit Z. b_4 The output terminal serves as the driving unit 230 b_2 The other drive output terminal, and the impedance matching circuit Z b_4 The output terminal and the auxiliary amplifier P b_2 The input terminal is connected, so that it can drive amplifier Q. b_4 First, the radio frequency signal Rf inb1_4 Power amplification into radio frequency signal Rf inb_4 Then, it passes through the impedance matching circuit Z. b_4 Output to auxiliary amplifier P b_2 Among them, the driver amplifier Q b_3 and Q b_4 It can be a single-transistor power amplifier, or a driver amplifier Q. b_3 and Q b_4 It can also be used for high-efficiency circuit architectures such as Dougherty power amplifiers.

[0110] Therefore, in the manner that one first driving branch drives one main amplifier or one auxiliary amplifier, the gain of the main amplifier and the auxiliary amplifier can be effectively improved, and the efficiency of the link can be improved. Moreover, the driving amplifier is connected to the main amplifier or the auxiliary amplifier through an impedance matching circuit to realize impedance matching. For example, the impedance matching circuit in the first driving unit can be composed of one or more discrete components such as a capacitor, an inductor, a resistor, and a microstrip line, or the impedance matching circuit in the first driving unit can be an integrated IPD chip circuit to realize the fundamental wave and harmonic wave matching from the output of the driving amplifier to the input of the main amplifier or the input of the auxiliary amplifier. In addition, the first driving unit and the first power amplifier connected thereto can be a separate power amplifier package device or a power amplifier die without packaging. In addition, the driving amplifier can be a single-tube power amplifier, or the driving amplifier can be a Doherty power amplifier or other high-efficiency circuit architecture to improve the driving efficiency and improve the link efficiency.

[0111] In some embodiments, the power amplifiers other than the first power amplifier among the plurality of power amplifiers can be set as a second power amplifier, and the driving unit connected to the second power amplifier can be set as a second driving unit. In this way, the radio frequency signal can be first amplified by the second driving unit and then output to the second power amplifier to meet the requirements of the second power amplifier on the input power and increase the link gain. In addition, the second driving unit can also have the function of adjusting the phase of the radio frequency signal to adjust the relationship between the phase and the amplitude of the radio frequency signal required by the second power amplifier and then output to the second power amplifier. The following will be described by taking the second power amplifier that can be provided with a plurality of single-tube power amplifiers as an example.

[0112] For example, referring to FIG. 8, the power amplifier 220 a includes two single-tube power amplifiers D a_1 and D a_2 , the power amplifier 220 a is connected to the driving unit 230 a , and the power amplifier 220 a is a second power amplifier, the driving unit 230 a is a second driving unit. For example, the driving unit 230 a may include two second driving branches, one of which includes a driving amplifier Q a_1 and an impedance matching circuit Z a_1 , and the input end of the driving amplifier Q a_1 is used to receive a radio frequency signal Rf ina1_1 , and the output end of the driving amplifier Q a_1 is connected to the impedance matching circuit Zthe input end of the impedance matching circuit Z a_1 the output end of the single-tube power amplifier D a_1 the input end of the impedance matching circuit Z a_1 The radio frequency signal Rf ina1_1 is power amplified into a radio frequency signal Rf ina_1 The radio frequency signal Rf a_1 is output to the single-tube power amplifier D a_1 . And, the other second drive branch includes a drive amplifier Q a_2 and an impedance matching circuit Z a_2 , and the input end of the drive amplifier Q a_2 is used to receive a radio frequency signal Rf ina1_2 , the output end of the drive amplifier Q a_2 is connected to the input end of the impedance matching circuit Z a_2 , the output end of the impedance matching circuit Z a_2 is connected to the input end of the single-tube power amplifier D a_2 , so that the radio frequency signal Rf a_2 is amplified by the drive amplifier Q ina1_2 first, and then the radio frequency signal Rf ina_2 is power amplified into a radio frequency signal Rf a_2 , and then the radio frequency signal Rf a_2 is output to the single-tube power amplifier D a_1 . Wherein, the drive amplifiers Q a_2 and Q a_1 may be single-tube power amplifiers, or the drive amplifiers Q a_2 and Q a_1 may be Doherty power amplifiers and other high-efficiency circuit architectures. In this way, by using one second drive branch to drive one single-tube power amplifier D a_2 or D a_1 , the gain of the single-tube power amplifier D a_2 or D a_1 can be effectively improved, and the efficiency of the link can be improved. And, the drive amplifier Q a_1 is connected to the single-tube power amplifier D a_1 through an impedance matching circuit Z a_2 , and the drive amplifier Q a_2 is connected to the single-tube power amplifier D a_2 through an impedance matching circuit Z

[0120] to achieve impedance matching.

[0113] Exemplarily, the impedance matching circuit in the second driving unit can be composed of one or more discrete elements of capacitance, inductance, resistance, microstrip line, etc., or the impedance matching circuit in the second driving unit can also be an integrated IPD chip circuit, realizing the fundamental wave and harmonic matching from the output of the driving amplifier to the input of the second power amplifier. In addition, the second driving unit and the second power amplifier connected thereto can be a separate power amplifier package device, or can be a power amplifier die without packaging. Furthermore, the driving amplifier can be a single-tube power amplifier, or the driving amplifier can also be a Doherty power amplifier or other high-efficiency circuit architecture.

[0114] In some embodiments, the driving amplifier Q a_1 , Q a_2 , Q b_1 , Q b_2 , Q b_3 , Q b_4 , can be implemented with the same architecture, or can also be implemented with different architectures, which are not limited herein.

[0115] Exemplarily, referring to FIG. 8, when the power amplifier assembly 200 is working, the radio frequency signal Rf ina1_1 is amplified by the driving amplifier Q a_1 , and then output to the single-tube power amplifier D ina_1 through the impedance matching circuit Z a_1 . The radio frequency signal Rf a_1 is amplified by the driving amplifier Q ina1_2 , and then output to the single-tube power amplifier D a_2 through the impedance matching circuit Z ina_2 . The radio frequency signal Rf a_2 is amplified by the driving amplifier Q a_2 , and then output to the main amplifier M inb1_1 through the impedance matching circuit Z b_1 . The radio frequency signal Rf inb_1 is amplified by the driving amplifier Q b_1 , and then output to the main amplifier M b_1 through the impedance matching circuit Z inb1_2 . The radio frequency signal Rf b_2 is amplified by the driving amplifier Q inb_2 , and then output to the main amplifier M b_2 through the impedance matching circuit Z b_1 . The radio frequency signal Rf inb1_3 is amplified by the driving amplifier Q b_3 , and then output to the main amplifier M inb_3 through the impedance matching circuit Z b_3 . The radio frequency signal Rf b_2 is amplified by the driving amplifier Q inb1_4The driving amplifier Q b_4 The power amplifier is for radio frequency signal Rf inb_4 After that, through the impedance matching circuit Z b_4 Output to the auxiliary amplifier P b_2 And the rest of the power amplifier assembly shown in Figure 8 can refer to the first embodiment, and the specific details are not described here.

[0116] The third embodiment,

[0117] Figure 9 is another circuit structure of the power amplifier assembly in the embodiment of the application, referring to Figure 9, the embodiment is transformed for the implementation mode in the second embodiment. Only the difference between the embodiments is described below, and the same parts are not described here.

[0118] In some embodiments, referring to Figure 9, the power amplifier assembly provided by the embodiment of the application can further include a first signal decomposition circuit 241, wherein the input end of the first signal decomposition circuit 241 is used to receive a radio frequency signal (for example, Rf inc ), and the output end of the first signal decomposition circuit 241 is connected to at least part of the driving input end of the power unit. And the total number of radio frequency signals received by the first signal decomposition circuit 241 is less than the total number of radio frequency signals received by the power unit connected thereto. And the first signal decomposition circuit 241 is used to decompose the received radio frequency signals into multiple radio frequency signals with different amplitudes and phases and then output to the driving unit connected thereto, which is beneficial to reduce the link cost and complexity. And the first signal decomposition circuit 241 outputs multiple radio frequency signals with different amplitudes and phases, which can realize the isolation function of the combiner 210 as expected, and realize the high-efficiency working mode of the entire power amplifier assembly.

[0119] Exemplarily, the driving unit connected to the first signal decomposition circuit 241 can be connected to the power amplifier connected to the input port of the combiner 210. For example, referring to Figure 9, the driving units 230 b_1 and 230 b_2 are connected to the input ports I b_1 and I b_2 of the combiner 210 respectively, and the first signal decomposition circuit 241 is connected to the driving units 230 b_1 and 230 b_2 . Thus, the driving units 230 b_1 and 230 b_2 corresponding to the input ports I b_1 and I b_2 of the combiner 210 can input the required radio frequency signals based on the signal decomposition mode of the first signal decomposition circuit 241.

[0120] In some embodiments, when the combiner 210 has two input ports I b_1 and I b_2 , the driving units 230 b_1 and 230 b_2 may have two driving inputs respectively, the first signal decomposition circuit 241 can include three third bridges, which can include a first third bridge TC1, a second third bridge TC2 and a third third bridge TC3, a first balanced port of the first third bridge TC1 is configured to receive a radio frequency signal R finc , a second balanced port of the first third bridge TC1 is grounded, an isolation port of the first third bridge TC1 is connected with a first balanced port of the second third bridge TC2, an output port of the first third bridge TC1 is connected with a first balanced port of the third third bridge TC3. A second balanced port of the second third bridge TC2 is grounded, an isolation port of the second third bridge TC2 is connected with one driving input (i.e. the input of the driving amplifier Q b_1 ) of the driving unit 230 b_1 , an output port of the second third bridge TC2 is connected with another driving input (i.e. the input of the driving amplifier Q b_1 ) of the driving unit 230 b_2 . A second balanced port of the third third bridge TC3 is grounded, an isolation port of the third third bridge TC3 is connected with one driving input (i.e. the input of the driving amplifier Q b_2 ) of the driving unit 230 b_3 , an output port of the third third bridge TC3 is connected with another driving input (i.e. the input of the driving amplifier Q b_2 ) of the driving unit 230 b_4 . In this way, the first signal decomposition circuit 241 can be implemented by cascading multiple third bridges, and since the architecture of the third bridge is relatively mature, the first signal decomposition circuit 241 can be relatively simple to implement, thereby reducing the design difficulty and reducing the production cost. For example, each third bridge can be a 3dB bridge or a 5dB bridge with a specific impedance of 50 ohms. Of course, the above is only an example of the specific structure of the first signal decomposition circuit 241, and in specific implementation, the specific structure of the first signal decomposition circuit 241 is not limited to the above structure provided by the embodiments of the present application, but can also be other structures known to those skilled in the art, which are not limited herein.

[0121] For example, referring to FIG. 9, when the power amplifier assembly 200 is working, the first signal decomposition circuit 241 can directly receive a radio frequency signal Rf inc , and the driving unit 230 a may directly receive two radio frequency signals Rf ina1_1 and Rf ina1_2The power amplifier assembly in the embodiment of the present application can have three input RF signals, and can more flexibly play the best performance of the power amplifier assembly. And the RF signal Rf inc is decomposed into two RF signals Rf inc1_1 and Rf inc1_2 by the first third bridge TC1. inc1_1 is decomposed into two RF signals Rf inb1_1 and Rf inb1_2 by the second third bridge TC2. inc1_2 is decomposed into two RF signals Rf inb1_3 and Rf inb1_4 by the third third bridge TC3. And the remaining working principle of the power amplifier assembly shown in FIG. 9 can refer to Embodiment Two, which will not be described here in detail.

[0122] Embodiment Four,

[0123] FIG. 10 is another circuit structure schematic diagram of the power amplifier assembly in the embodiment of the present application. Referring to FIG. 10, the present embodiment is a transformation of the implementation in Embodiment Three. Only the differences between the present embodiment and Embodiment Three will be described below, and the same parts will not be described here in detail.

[0124] In some embodiments, referring to FIG. 10, the power amplifier 220 a is connected to the isolation port I a (e.g. the isolation port of the first bridge TA) of the combiner 210, the driving unit 230 a is connected to the power amplifier 220 a . When the driving unit 230 a has different multiple driving input terminals, the power amplifier assembly provided in the embodiment of the present application can further include a first signal synthesis circuit 251. The input terminals of the first signal synthesis circuit 251 are respectively connected to the multiple driving input terminals of the driving unit 230 a , and the output terminal of the first signal synthesis circuit 251 is connected to the input terminal of the first signal decomposition circuit 241. And the first signal synthesis circuit 251 is used to synthesize the received RF signals and output. Thus, the RF signals input by the driving unit 230 a can be synthesized into one RF signal by the first signal synthesis circuit 251, and then output to the input terminal of the first signal decomposition circuit 241, which can reduce the number of link channels and is beneficial to save link cost and area. For example, the driving unit 230 a has two driving input terminals, one of which (e.g. the input terminal of the driving amplifier Q a_1 ) receives the RF signal Rf ina1_1 , and the other of which (e.g. the input terminal of the driving amplifier Qa_2 RF ina1_2 . The input terminals of the first signal decomposition circuit 241 are respectively connected with the two driving input terminals (e.g. the input terminals of the driving amplifiers Q a_1 and Q a_2 ), so that the input terminals of the first signal decomposition circuit 241 respectively receive the radio frequency signals RF ina1_1 and RF ina1_2 , and thus the radio frequency signals RF ina1_1 and RF ina1_2 can be combined into one radio frequency signal RF inc , which is then output to the input terminals of the first signal decomposition circuit 241.

[0125] In some examples, the first signal combination circuit 251 can include a plurality of fourth bridges. For example, referring to FIG. 11, which is a schematic diagram of a circuit structure of a first signal combination circuit in an embodiment of the present application, the first signal combination circuit 251 can include three fourth bridges: a first fourth bridge TD1, a second fourth bridge TD2, a third fourth bridge TD3, and a microstrip line 251 a . The first balanced port and the isolation port of the first fourth bridge TD1 are both connected with the input terminals of the driving amplifiers Q a_1 to receive the radio frequency signals RF ina1_1 . The second balanced port of the first fourth bridge TD1 is grounded, and the output port of the first fourth bridge TD1 is connected with the first balanced port of the third fourth bridge TD3 through the microstrip line 251 a . The first balanced port of the second fourth bridge TD2 is grounded, and the second balanced port and the output port of the second fourth bridge TD2 are both connected with the input terminals of the driving amplifiers Q a_2 to receive the radio frequency signals RF ina1_2 . The second balanced port of the second fourth bridge TD2 is connected with the second balanced port of the third fourth bridge TD3. The isolation port of the third fourth bridge TD3 is grounded, and the output port of the third fourth bridge TD3 is connected with the input terminal (e.g. the first balanced port of the first third bridge TC1) of the first signal decomposition circuit 241 to output the radio frequency signals RF inc . Thus, the first signal combination circuit 251 is composed of the fourth bridges and the microstrip line 251 a , which can make the first signal combination circuit 251 relatively simple to implement, thereby reducing the design difficulty and the production cost. For example, the fourth bridges can be 3dB bridges or 5dB bridges with a characteristic impedance of 50 ohms. Moreover, the microstrip line 251 aThe phase of the first signal synthesis circuit 251 is β. Of course, the above is only an example of the specific structure of the first signal synthesis circuit 251, and in specific implementation, the specific structure of the first signal synthesis circuit 251 is not limited to the above structure provided by the embodiments of the present application, and can also be other structures known to those skilled in the art, which are not limited herein.

[0126] Exemplarily, referring to FIG. 10, when the power amplifier assembly 200 is working, the radio frequency signals Rf ina1_1 and Rf ina1_2 are input to the first signal decomposition circuit 241, power division is performed through the first fourth bridge TD1 and the second fourth bridge TD2, and then the radio frequency signals Rf a are phase-shifted through the microstrip line 251 inc , and then combined through the third fourth bridge TD3 to generate the radio frequency signal Rf inc . Thus, the phase of the radio frequency signal Rf ina1_1 is determined by the phases of the radio frequency signals Rf ina1_2 and Rf a and the microstrip line 251 ina1_1 , and thus the required radio frequency signal Rf ina1_2 can be obtained by adjusting the radio frequency signals Rf a and Rf inc and the microstrip line 251 . Based on this, the power amplifier assembly in the embodiments of the present application can be reduced from 3 radio frequency signal inputs in the third embodiment to 2 radio frequency signal inputs, which can reduce the number of link channels and is beneficial to saving link cost and area. In addition, the remaining working principles of the power amplifier assembly shown in FIG. 10 can be referred to the third embodiment, and details are not described herein.

[0127] In the fifth embodiment,

[0128] FIG. 12 is another circuit structure schematic diagram of the power amplifier assembly in the embodiments of the present application. Referring to FIG. 12, the present embodiment is a transformation of the implementation manner in the fourth embodiment. Only the differences between the present embodiment and the fourth embodiment are described below, and the same parts are not described herein.

[0129] In some embodiments, referring to FIG. 12, the driving unit 230 b_1 is a first driving unit, which can make the driving unit 230 b_1 have one driving input end, and the driving unit 230 b_1 may include a driving amplifier Q b_1 and a power distribution assembly F b_1 , and the output end of the driving amplifier Q b_1 is connected to the input end of the power distribution assembly F b_1 . Thus, the input end of the driving amplifier Q b_1 can be the driving unit 230b_1 The drive input terminal then drives amplifier Q. b_1 The input terminal can receive radio frequency signal Rf inb1_1 Power distribution component F b_1 The power distribution component F has multiple output terminals. b_1 One output terminal is the drive unit 230 b_1 One of the drive output terminals, and the power distribution component F b_1 Used to drive amplifier Q b_1 The output RF signal is divided into multiple RF signals and output through different output terminals. Therefore, a single driver amplifier Q can be used. b_1 and power distribution component F b_1 To drive the main amplifier M b_1 and auxiliary amplifier P b_1 This helps save space.

[0130] For example, power distribution component F b_1 It may include the fifth bridge TE b_1 Fifth bridge TE b_1 The first balanced port and the drive amplifier Q b_1 The output terminal of the fifth bridge TE is connected. b_1 The second balanced port is grounded, and the fifth bridge TE b_1 The isolation port of the main amplifier M b_1 The input terminals of the fifth bridge TE are connected. b_1 The output port of the auxiliary amplifier P b_1 The input terminal is connected. This allows the power distribution component F to... b_1 Using the fifth bridge TE b_1 This reduces design complexity and production costs. For example, the fifth bridge TE... b_1 It can be a 3dB or 5dB bridge with a characteristic impedance of 50 ohms. Of course, the above is merely an example to illustrate the power distribution component F. b_1 The specific structure, in practical implementation, is the power distribution component F b_1 The specific structure is not limited to the structure provided in the embodiments of this application, and may also be other structures known to those skilled in the art, which are not limited here.

[0131] In some embodiments, referring to FIG12, the drive unit 230 b_2 It is also set as the first drive unit, which can enable drive unit 230 b_2 It has a drive input terminal, and the drive unit 230 b_2 It may include the driver amplifier Q b_2 and power distribution component F b_2 , drive amplifier Q b_2an output terminal of the drive amplifier Q b_2 is connected. Thus, the input terminal of the drive amplifier Q b_2 may be connected to a drive input terminal of the drive unit 230 b_2 . The output terminal of the drive amplifier Q b_2 may receive the radio frequency signal Rf inb1_2 . The power distribution component F b_2 has a plurality of different output terminals. One output terminal of the power distribution component F b_2 is a drive output terminal of the drive unit 230 b_2 , and the power distribution component F b_2 is configured to divide the radio frequency signal output by the drive amplifier Q b_2 into a plurality of radio frequency signals and output the radio frequency signals through different output terminals. In this way, one drive amplifier Q b_2 and the power distribution component F b_2 may be used to implement the main amplifier M b_2 and the auxiliary amplifier P b_2 , which is beneficial to saving area.

[0132] Exemplarily, the power distribution component F b_2 may include a fifth electrical bridge TE b_2 . A first balanced port of the fifth electrical bridge TE b_2 is connected to the output terminal of the drive amplifier Q b_2 , a second balanced port of the fifth electrical bridge TE b_2 is grounded, an isolation port of the fifth electrical bridge TE b_2 is connected to the input terminal of the main amplifier M b_2 , and an output port of the fifth electrical bridge TE b_2 is connected to the input terminal of the auxiliary amplifier P b_2 . In this way, the power distribution component F b_2 may be implemented by using the fifth electrical bridge TE b_2 , which reduces design difficulty and reduces production cost. Exemplarily, the fifth electrical bridge TE b_2 may be a 3dB electrical bridge or a 5dB electrical bridge with a characteristic impedance of 50 ohms. Of course, the above is only an example of the specific structure of the power distribution component F b_2 , and in specific implementation, the specific structure of the power distribution component F b_2 is not limited to the above structure provided in the embodiments of the present application, but can also be other structures known to those skilled in the art, which are not limited herein.

[0133] In some embodiments, the fifth electrical bridge TE b_1 may have the same structure as the electrical bridge TE b_2 , or can have a different structure, which is not limited herein.

[0134] In some embodiments, referring to FIG. 12, the combiner 210 has two input ports I b_1 and I b_2 , the driving units 230 b_1 and 230 b_2 have a driving input end respectively, the first signal decomposition circuit 241 can include a second bridge TB, wherein the first balanced port of the second bridge TB is configured to receive the radio frequency signal Rf inc , the second balanced port of the second bridge TB is grounded, the isolation port of the second bridge TB is connected with the driving input end (e.g. the input end of the driving amplifier Q b_1 ) of the driving unit 230 b_1 , and the output port of the second bridge TB is connected with the driving input end (e.g. the input end of the driving amplifier Q b_2 ) of the driving unit 230 b_2 . In this way, the first signal decomposition circuit 241 can be implemented by using the second bridge TB, so as to reduce the design difficulty and the production cost. For example, the second bridge TB can be a 3dB bridge or a 5dB bridge with a characteristic impedance of 50 ohms. Of course, the above is only an example of the specific structure of the first signal decomposition circuit 241, and in the specific implementation, the specific structure of the first signal decomposition circuit 241 is not limited to the above structure provided in the embodiments of the present application, but can also be other structures known to those skilled in the art, which are not limited herein.

[0135] In some embodiments, referring to FIG. 12, the first balanced port of the second bridge TB can be connected with the output end of the first signal synthesis circuit 251, so as to output the radio frequency signal Rf inc to the first balanced port of the second bridge TB through the first signal synthesis circuit 251, so that the power amplifier assembly in the embodiments of the present application can input two radio frequency signals.

[0136] For example, referring to FIG. 12, when the power amplifier assembly is working, the radio frequency signals Rf ina1_1 and Rf ina1_2 are input to the first signal synthesis circuit 251, and after being combined into one radio frequency signal Rf inc by the first signal synthesis circuit 251, the radio frequency signal Rf inc is output to the first balanced port of the second bridge TB. After being divided by the second bridge TB, the radio frequency signal Rf b_1 is output to the input end of the driving amplifier Q inb1_1 , and the radio frequency signal Rf b_2 is output to the input end of the driving amplifier Q inb1_2 . After being amplified by the driving amplifier Q inb1_1 and then being divided by the fifth bridge TE b_1 , the radio frequency signal Rf b_1 is output to the main amplifier M b_1The input terminal outputs the radio frequency signal Rf. inb_1 Auxiliary amplifier P b_1 The input terminal outputs the radio frequency signal Rf. inb_2 Similarly, the radio frequency signal Rf inb1_2 After passing through the driver amplifier Q b_2 After amplification, it passes through the fifth bridge TE. b_2 Power split, to main amplifier M b_2 The input terminal outputs the radio frequency signal Rf. inb_3 Auxiliary amplifier P b_2 The input terminal outputs the radio frequency signal Rf. inb_4 Furthermore, the remaining operating principles of the power amplifier assembly shown in Figure 12 can be referred to in Embodiment 4, and will not be elaborated here.

[0137] Example 6

[0138] Figure 13 is a schematic diagram of another circuit structure of the power amplifier component in this application embodiment. Referring to Figure 13, this embodiment is a modification of the implementation method in Embodiment 5. The difference between this embodiment and Embodiment 5 is that: a first signal synthesis circuit is not provided, and instead, the radio frequency signal Rf is directly input to the input terminal of the first signal decomposition circuit 241. inc Based on this, the power amplifier component in this embodiment can be increased from two RF signal inputs in Embodiment 5 to three RF signal inputs. Furthermore, the remaining operating principle of the power amplifier component shown in Figure 13 can be referred to Embodiment 5, and will not be elaborated here.

[0139] Example 7

[0140] Figure 14a is a schematic diagram of another circuit structure of the power amplifier component in the embodiment of this application. Referring to Figure 14a, this embodiment is a modification of the implementation method in embodiment four. The following only describes the differences between this embodiment and embodiment four, and the similarities are not repeated here.

[0141] In some embodiments, referring to FIG14a, in the power amplifier assembly 200 provided in this application embodiment, power amplifier 220 a Isolation port I of combiner 210 a If connected, power amplifier 220a can also be configured as the first power amplifier. For example, power amplifier 220 a Including main amplifier M a_1 Auxiliary amplifier P a_1 and power combining component 221 a Main amplifier M a_1 The input terminal receives the radio frequency signal Rf ina_1 Auxiliary amplifier P a_1 The input terminal receives the radio frequency signal Rfina_2 RF signal Rf ina_1 and RF signal Rf ina_2 are different. And, the output end of the main amplifier M a_1 and the output end of the auxiliary amplifier P a_1 are connected with the isolation port I a (e.g. the isolation port of the first bridge TA) of the combiner 210 through the power synthesis component 221 a , so that the RF signals output by the main amplifier M a_1 and the auxiliary amplifier P a_1 are synthesized into one RF signal by the power synthesis component 221 a and then sent to the isolation port I a (e.g. the isolation port of the first bridge TA) of the combiner 210. In this way, the power amplifier 220 a is also implemented in the architecture of the first power amplifier, so that the main amplifier M a_1 serves as the main path in the power amplifier 220a, and the auxiliary amplifier P a_1 serves as the auxiliary path in the power amplifier 220a. Therefore, when the power amplifier 220 a is working, the main amplifier M a_1 works first, and as the output power increases, the main amplifier M a_1 reaches saturation, and the first high-efficiency point appears. Then, the auxiliary amplifier P a_1 starts to work, and when the auxiliary amplifier P a_1 reaches saturation, the second high-efficiency point appears. Based on this, not only good wideband characteristics can be ensured, but also the power backoff amount can be improved, and the efficiency in the small output power range can be improved.

[0142] Exemplarily, the power synthesis component 221 a may include a circulator HA, the output end of the main amplifier M a_1 is connected with the isolation port of the circulator HA, the output end of the auxiliary amplifier P a_1 is connected with the input port of the circulator HA, and the output port of the circulator HA is connected with the isolation port I a (e.g. the isolation port of the first bridge TA) of the combiner 210. In this way, the power synthesis component 221 a is implemented by using the circulator HA, and since the architecture of the circulator HA is relatively mature, the power synthesis component 221 a is relatively simple to implement, thereby reducing the design difficulty and the production cost. Based on this, the power amplifier 220 a is implemented by using the CLMA power amplifier based on the circulator, thereby reducing the design difficulty and the production cost.

[0143] The working principle of the power amplifier assembly is described below with reference to the structure of the power amplifier assembly shown in FIG. 14a and the diagram of the relationship between the output power and the efficiency shown in FIG. 14b. In FIG. 14b, the dashed line represents the relationship between the output power and the efficiency corresponding to the power amplifier assembly in the prior art, and the solid line represents the relationship between the output power and the efficiency corresponding to the power amplifier assembly in the embodiment of the present application.

[0144] When the power amplifier assembly is working, the main amplifier M a_1 is biased as class AB, and the auxiliary amplifier P a_1 is biased as class AB. b_1 The main amplifier M b_2 is biased as class AB, and the auxiliary amplifier P b_1 is biased as class AB. b_2 The main amplifier M ina_1 and the auxiliary amplifier P inb_2 are biased as the same class AB. When the input radio frequency signal Rf a_1 and Rf b_1 have low power, the auxiliary amplifier P b_2 , the main amplifier M b_1 and the auxiliary amplifier P b_2 are in the off state, and the main amplifier M a_1 works. As the power of the radio frequency signal Rf ina_1 and Rf ina_2 increases, the main amplifier M a_1 reaches voltage saturation, so that the first high-efficiency point appears with the increase of the output power. Then, as the power of the radio frequency signal Rf ina_1 and Rf ina_2 increases, the auxiliary amplifier P a_1 starts to work. As the power of the radio frequency signal Rf ina_1 and Rf ina_2 increases, the auxiliary amplifier P a_1 reaches voltage saturation, so that the second high-efficiency point appears with the increase of the output power. Then, as the power of the radio frequency signal Rf ina_1 and Rf ina_2 increases, the main amplifier M b_1 in the power amplifier 220 b_1 and the main amplifier M b_2 in the power amplifier 220 b_2 start to work at the same time. As the main amplifiers M b_1 and M b_2 start to work, the output efficiency first decreases and then increases. When the main amplifiers M b_1 and M b_2 reach voltage saturation, the main amplifier M a_1 , the auxiliary amplifier P a_1 and the main amplifier Mb_1 and M b_2 all work in high efficiency state, so that a third high efficiency point appears with the increase of output power. Then, with the continuous increase of power of RF ina_1 and Rf ina_2 , auxiliary amplifiers P b_1 and P b_2 are simultaneously turned on to work, and the output efficiency first decreases and then increases, and finally the main amplifier M a_1 , auxiliary amplifiers P a_1 , main amplifier M b_1 and M b_2 and auxiliary amplifiers P b_1 and P b_2 all work in high efficiency state, so that a fourth high efficiency point appears with the increase of output power, and the maximum power output is realized. Thus, high efficiency in a large backoff power interval is realized. Moreover, the efficiency dip problem can be improved, and the efficiency of the overall power amplifier assembly can be improved on the basis of ensuring a large backoff range of -15 dB to 0 dB. In addition, the remaining working principle of the power amplifier assembly shown in FIG. 14a can be referred to Embodiment Four, and will not be repeated here.

[0145] In some embodiments, the structure of the power amplifier assembly in Embodiment Seven can be deformed according to the structures of the power amplifier assemblies shown in other embodiments of the present application, so that the structure of the power amplifier assembly in Embodiment Seven can have multiple structures, and will not be repeated here.

[0146] Embodiment Eight,

[0147] FIG. 15 is another circuit structure schematic diagram of a power amplifier assembly in an embodiment of the present application. Referring to FIG. 15, the present embodiment is deformed for the implementation manner in Embodiment Seven, and the same parts will not be repeated here, and the different parts are that: the power combining assembly 221a can also include a sixth bridge TF and a microstrip line 411 c The first balanced port of the sixth bridge TF is connected with the output end of the main amplifier M a_1 , the second balanced port of the sixth bridge TF is connected with the output end of the auxiliary amplifier P a_1 , the isolation port of the sixth bridge TF is connected with the microstrip line 411 c , and the output port of the sixth bridge TF is connected with the isolation port I a (e.g., the isolation port of the first bridge TA) of the combiner 210. Thus, the power combining assembly 221 a is realized by using the sixth bridge TF and the microstrip line 411 c . Since the architecture of the sixth bridge TF and the microstrip line 411 c is relatively mature, the power combining assembly 221a The implementation is relatively simple, thereby reducing the design difficulty and the production cost. Based on this, the power amplifier 220 a The Doherty power amplifier based on the bridge combination is adopted, thereby reducing the design difficulty and the production cost. The working principle of the power amplifier assembly shown in FIG. 15 can refer to the seventh embodiment, and details are not described herein. In addition, the structure of the power amplifier assembly in the eighth embodiment can be deformed according to the structures of the power amplifier assemblies shown in other embodiments of the present application, so that the structure of the power amplifier assembly in the eighth embodiment can have multiple structures, and details are not described herein.

[0148] The ninth embodiment,

[0149] FIG. 16a is another circuit structure schematic diagram of the power amplifier assembly in the embodiments of the present application. Referring to FIG. 16a, the present embodiment is deformed for the implementation mode in the seventh embodiment, and only the difference between the present embodiment and the seventh embodiment is described below, and the same parts are not described herein.

[0150] In some embodiments, referring to FIG. 16a, the power amplifier 220 b_1 is connected with the input port I b_1 (for example, the first balanced port of the first bridge TA) of the combiner 210, the power amplifier 220 b_1 may be set as a second power amplifier, and the power amplifier 220 b_1 is a single-tube power amplifier D b_1 , wherein the input end of the single-tube power amplifier D b_1 is used to receive the radio frequency signal Rf inb_1 , and the output end of the single-tube power amplifier D b_1 is connected with the input port I b_1 (for example, the second balanced port of the first bridge TA) of the combiner 210. And the power amplifier 220 b_2 is connected with the input port I b_2 (for example, the first balanced port of the first bridge TA) of the combiner 210, the power amplifier 220 b_2 may be set as a second power amplifier, and the power amplifier 220 b_2 is a single-tube power amplifier D b_2 , wherein the input end of the single-tube power amplifier D b_2 is used to receive the radio frequency signal Rf inb_2 , and the output end of the single-tube power amplifier D b_2 is connected with the input port I b_12 (for example, the second balanced port of the first bridge TA) of the combiner 210. Thus, the power amplifier 220 b_1And 220 b_2 The single-tube power amplifier is implemented, and the architecture of the single-tube power amplifier is relatively mature, so that the power amplifier 220 b_1 And 220 b_2 It is relatively simple to implement, thereby reducing the design difficulty and reducing the production cost.

[0151] The power amplifier 220 b_1 The driving unit 230 b_1 is set as a second driving unit. Therefore, the driving unit 230 b_1 has one driving input end and one driving output end. Moreover, the driving unit 230 b_1 may include a driving amplifier Q b_1 and an impedance matching circuit Z b_1 The output end of the driving amplifier Q b_1 is connected to the input end of the impedance matching circuit Z b_1 , and the input end of the driving amplifier Q b_1 is the driving input end of the driving unit 230 b_1 to receive the radio frequency signal Rf inb1_1 The output end of the impedance matching circuit Z b_1 is the driving output end of the driving unit 230 b_1 , so that the output end of the impedance matching circuit Z b_1 is connected to the input end of the single-tube power amplifier D b_1 . Thus, the gain of the single-tube power amplifier D b_1 can be effectively improved, and the efficiency of the link can be improved. Moreover, the driving amplifier Q b_1 is connected to the single-tube power amplifier D b_1 through the impedance matching circuit Z b_1 to achieve impedance matching.

[0152] The power amplifier 220 b_2 is set as a second power amplifier, and the driving unit 230 b_2 is set as a second driving unit. Therefore, the driving unit 230 b_2 has one driving input end and one driving output end. Moreover, the driving unit 230 b_2 may include a driving amplifier Q b_2 and an impedance matching circuit Z b_2 The output end of the driving amplifier Q b_2 is connected to the input end of the impedance matching circuit Z b_2 , and the input end of the driving amplifier Q b_2 is the driving input end of the driving unit 230 b_2 to receive the radio frequency signal Rf inb1_2, the output end of the impedance matching circuit Z b_2 is connected to the driving output end of the driving unit 230 b_2 , so that the output end of the impedance matching circuit Z b_2 is connected to the input end of the single tube power amplifier D b_2 . In this way, the gain of the single tube power amplifier D b_2 can be effectively improved, and the efficiency of the link can be improved. Moreover, the driving amplifier Q b_2 is connected to the single tube power amplifier D b_2 through the impedance matching circuit Z b_2 , so that impedance matching is realized.

[0153] Exemplarily, the impedance matching circuits Z b_1 and Z b_2 may be composed of discrete components of one or more of a capacitor, an inductor, a resistor, a microstrip line, etc., or the impedance matching circuits Z b_1 and Z b_2 may be integrated IPD chip circuits, respectively realizing the fundamental wave and harmonic matching of the outputs of the driving amplifiers Q b_1 and Q b_2 to the inputs of the single tube power amplifiers D b_1 and D b_2 . Moreover, the second driving unit and the second power amplifier connected thereto can be a separate power amplifier package device or a power amplifier die without packaging. In addition, the driving amplifiers Q b_1 and Q b_2 may be single tube power amplifiers, or the driving amplifiers Q b_1 and Q b_2 may be Doherty power amplifiers or other high-efficiency circuit architectures.

[0154] In some embodiments, referring to FIG. 16a, the combiner 210 has two input ports I b_1 and I b_2 , the driving units 230 b_1 and 230 b_2 each have one driving input end, and the first signal decomposition circuit 241 can include a second bridge TB. The specific implementation of the second bridge TB can refer to Embodiment Five, and will not be described in detail here.

[0155] The working principle of the power amplifier assembly will be described below with reference to the structure of the power amplifier assembly shown in FIG. 16a and the schematic diagram of the relationship curve between output power and efficiency shown in FIG. 16b. In FIG. 16b, the dashed line represents the relationship curve between output power and efficiency corresponding to the power amplifier assembly in the prior art, and the solid line represents the relationship curve between output power and efficiency corresponding to the power amplifier assembly in the embodiments of the present application.

[0156] When the power amplifier assembly 200 is working, the radio frequency signals Rf ina1_1 and Rf ina1_2 are input to the first signal combining circuit 251, combined into one radio frequency signal Rf inc through the first signal combining circuit 251, and then output to the first balanced port of the second bridge TB. After power division through the second bridge TB, the radio frequency signal Rf b_1 is output to the input end of the driver amplifier Q inb1_1 , and the radio frequency signal Rf b_2 is output to the input end of the driver amplifier Q inb1_2 . The radio frequency signal Rf inb1_1 is amplified by the driver amplifier Q b_1 into the radio frequency signal Rf inb_1 , and then output to the single-tube power amplifier D b_1 through the impedance matching circuit Z b_1 . The radio frequency signal Rf inb_1 is power amplified by the single-tube power amplifier D b_1 , and then output to the input port I b_1 (e.g. the first balanced port of the first bridge TA) of the combiner 210. Similarly, the radio frequency signal Rf inb1_2 is amplified by the driver amplifier Q b_2 into the radio frequency signal Rf inb_2 , and then output to the single-tube power amplifier D b_2 through the impedance matching circuit Z b_2 . The radio frequency signal Rf inb_2 is power amplified by the single-tube power amplifier D b_2 , and then output to the input port I b_2 (e.g. the second balanced port of the first bridge TA) of the combiner 210. Moreover, the main amplifier M a_1 is biased as AB class, the auxiliary amplifier P a_1 is biased as shallow C class, and the single-tube power amplifiers D b_1 and D b_2 are biased as the same deep C class (or the bias of the single-tube power amplifiers D b_1 and D b_2 may also be different). When the power of the input radio frequency signals Rf ina_1 and Rf inb_2 is small, the auxiliary amplifier P a_1 and the single-tube power amplifiers D b_1 and D b_2 are all in the off state, and the main amplifier M a_1 works. As the power of the radio frequency signals Rf ina_1 and Rf ina_2 increases, the main amplifier M a_1reach voltage saturation, so that the first high efficiency point appears with the increase of output power. After that, with the increase of power of radio frequency signals Rf ina_1 and Rf ina_2 , the auxiliary amplifier P a_1 starts to work, with the increase of power of radio frequency signals Rf ina_1 and Rf ina_2 , the auxiliary amplifier P a_1 reaches voltage saturation, so that the second high efficiency point appears with the increase of output power. After that, with the increase of power of radio frequency signals Rf ina_1 and Rf ina_2 , the single tube power amplifiers D b_1 and D b_2 start to work simultaneously, and because the single tube power amplifiers D b_1 and D b_2 start to work, the output efficiency first decreases and then increases, and finally the main amplifier M a_1 , the auxiliary amplifier P a_1 , the single tube power amplifiers D b_1 and D b_2 all work in high efficiency state, so that the third high efficiency point appears with the increase of output power, and the maximum power output is realized. Thus, high efficiency in a large backoff power interval is realized. Moreover, the efficiency dip problem can be improved on the basis of ensuring a large backoff range of -15dB-0dB, and the efficiency of the overall power amplifier assembly is improved. In addition, the remaining working principle of the power amplifier assembly shown in FIG. 16a can refer to embodiment seven, and will not be described here in detail.

[0157] In some embodiments, the structure of the power amplifier assembly in embodiment nine can be deformed according to the structure of the power amplifier assembly shown in other embodiments in the present application, so that the structure of the power amplifier assembly in embodiment nine can have multiple structures, and will not be described here in detail.

[0158] Embodiment ten,

[0159] FIG. 17 is another circuit structure schematic diagram of a power amplifier assembly in the present application, referring to FIG. 17, the present embodiment is deformed for the implementation mode in embodiment nine, and the same parts will not be described here, and the different parts are that the power combining assembly 221 a in the power amplifier 220 a may also include a microstrip line 411 d , the output end of the main amplifier M a_1 is connected with the first end of the microstrip line 411 d , the output end of the auxiliary amplifier P a_1 is connected with the second end of the microstrip line 411 d and the isolation port I of the combiner 210 respectively.a (eg the isolated port of the first bridge TA) is connected. Based on this, the power amplifier 220 a is implemented by using a 2-way Doherty power amplifier based on microstrip line combining. Since the architecture of the 2-way Doherty power amplifier based on microstrip line combining is relatively mature, the power amplifier 220 a is relatively simple to implement, thereby reducing the design difficulty and production cost. Among them, the main amplifier M a_1 is biased as class AB, and the auxiliary amplifier P a_1 is biased as class AB, and the auxiliary amplifier P b_1 is biased as class AB, and the auxiliary amplifier P b_2 is biased as class AB, and the auxiliary amplifier P b_1 is biased as class AB, and the auxiliary amplifier P b_2 is biased as class AB, and the auxiliary amplifier P b_1 is biased as class AB, and the auxiliary amplifier P b_2 is biased as class AB, and the auxiliary amplifier P b_1 is biased as class AB, and the auxiliary amplifier P b_2 is biased as class AB, and the auxiliary amplifier P b_1 is biased as class AB, and the auxiliary amplifier P b_2 is biased as class AB, and the auxiliary amplifier P a has load traction, and can further increase the backoff amount.

[0160] Exemplarily, the power amplifier 220 a may also include multiple auxiliary amplifiers, thereby making the power amplifier 220 a be implemented by using a 3-way (or also can be 4-way, 5-way or more) Doherty power amplifier based on microstrip line (or also can be bridge or balun) combining, and the 3-way (or also can be 4-way, 5-way or more) Doherty power amplifier can be a traditional high-efficiency circuit architecture or a new high-efficiency circuit architecture (eg NXP architecture). And the working principle of the power amplifier assembly shown in Figure 17 can refer to Embodiment Nine, which will not be described here. In addition, the structure of the power amplifier assembly in Embodiment Ten can also be deformed according to the structure of the power amplifier assembly shown in other embodiments of the present application, so that the structure of the power amplifier assembly in Embodiment Ten can have many kinds, which will not be described here.

[0161] Embodiment Eleven,

[0162] Figure 18 is another circuit structure of the power amplifier assembly in the present application, referring to Figure 18, the present embodiment is deformed for the implementation of Embodiment Seven, only the difference between the present embodiment and Embodiment Seven will be described below, and the same parts will not be described here.

[0163] In some embodiments, referring to FIG. 18, the power amplifier 220 a is connected with the isolation port I a (e.g. the isolation port of the first bridge TA), and the power amplifier 220 a is a first power amplifier, and the power amplifier 220 a has a main amplifier M a_1 , a subsidiary amplifier P a_1 , and P a_2 , and the power combining component 221a includes a microstrip line 411 e_1 , 411 e_2 , and 411 e_3 , the output end of the main amplifier M a_1 is connected with the first end of the microstrip line 411 e_1 , the second end of the microstrip line 411 e_1 is connected with the output end of the subsidiary amplifier P a_1 and the first end of the microstrip line 411 e_2 , the second end of the microstrip line 411 e_2 is connected with the output end of the subsidiary amplifier P a_2 and the first end of the microstrip line 411 e_3 , the second end of the microstrip line 411 e_3 is connected with the isolation port I a (e.g. the isolation port of the first bridge TA) of the combiner 210. In this way, the power amplifier 220 a can be implemented by a 3-tube Doherty power amplifier based on microstrip line combining, reducing the design difficulty and production cost.

[0164] In addition, the power amplifier 220 a is a first power amplifier, and the driving unit 230 a is a first driving unit. For example, the driving unit 230 a may include three first driving branches, one of which includes a driving amplifier Q a_1 and an impedance matching circuit Z a_1 , and the input end of the driving amplifier Q a_1 is used to receive the radio frequency signal Rf ina1_1 , the output end of the driving amplifier Q a_1 is connected with the input end of the impedance matching circuit Z a_1 , and the output end of the impedance matching circuit Z a_1 is connected with the input end of the main amplifier M a_1 , so that the radio frequency signal Rf a_1 can be first power amplified by the driving amplifier Q ina1_1 into the radio frequency signal Rfina_1 the main amplifier M a_1 . And, the other first driving branch comprises a driving amplifier Q a_2 and an impedance matching circuit Z a_2 , and the input end of the driving amplifier Q a_2 is configured to receive the radio frequency signal Rf ina2_1 , the output end of the driving amplifier Q a_2 is connected with the input end of the impedance matching circuit Z a_2 , the output end of the impedance matching circuit Z a_2 is connected with the input end of the auxiliary amplifier P a_1 , so that the radio frequency signal Rf a_2 received by the driving amplifier Q ina2_1 is firstly power amplified into the radio frequency signal Rf ina_2 , and then output to the auxiliary amplifier P a_1 . And, the last first driving branch comprises a driving amplifier Q a_3 and an impedance matching circuit Z a_3 , and the input end of the driving amplifier Q a_3 is configured to receive the radio frequency signal Rf ina2_2 , the output end of the driving amplifier Q a_3 is connected with the input end of the impedance matching circuit Z a_3 , the output end of the impedance matching circuit Z a_3 is connected with the input end of the auxiliary amplifier P a_2 , so that the radio frequency signal Rf a_3 received by the driving amplifier Q ina2_2 is firstly power amplified into the radio frequency signal Rf ina_3 , and then output to the auxiliary amplifier P a_2 . Wherein, the driving amplifiers Q a_1 to Q a_3 may be single-tube power amplifiers, or the driving amplifiers Q a_1 to Q a_3 may be Doherty power amplifiers and other high-efficiency circuit architectures.

[0165] In some embodiments, referring to FIG. 18, the driving unit 230 a has three driving output ends, and the power amplifier assembly 200 further comprises a second signal decomposition circuit 242, the input end of the second signal decomposition circuit 242 is configured to receive the radio frequency signal Rf ina1_2 , the output end of the second signal decomposition circuit 242 is connected with two driving input ends (for example, the input ends corresponding to the driving amplifiers Q a_2 and Q a_3 ) of the three driving output ends, and the second signal decomposition circuit 242 is configured to decompose the received radio frequency signal Rf ina1_2The output is decomposed into multiple radio frequency signals, which is beneficial to reduce the link cost and complexity. In other embodiments, the second signal decomposition circuit 242 can not be provided, and the three driving outputs of the driving unit 230 directly receive the radio frequency signals. a The three driving outputs of the driving unit 230 directly receive the radio frequency signals.

[0166] Exemplarily, the second signal decomposition circuit 242 can include a seventh bridge TG, a first balanced port of the seventh bridge TG is used to receive the radio frequency signal Rf ina1_2 , a second balanced port of the seventh bridge TG is grounded, an isolation port of the seventh bridge TG is connected with one driving input (for example, the input of the driving amplifier Q a_2 ), and an output port of the seventh bridge TG is connected with another driving input (for example, the input of the driving amplifier Q a_3 ). In this way, the second signal decomposition circuit 242 can be implemented by the seventh bridge TG, which reduces the design difficulty and reduces the production cost. Exemplarily, the seventh bridge TG can be a 3dB bridge or a 5dB bridge with a specific impedance of 50 ohms. Of course, the above is only an example of the specific structure of the second signal decomposition circuit 242, and in specific implementation, the specific structure of the second signal decomposition circuit 242 is not limited to the above structure provided by the embodiments of the present application, and can also be other structures known to those skilled in the art, which are not limited herein.

[0167] Exemplarily, referring to FIG. 18, when the power amplifier assembly 200 works, the second signal decomposition circuit 242 can directly receive a radio frequency signal Rf ina1_2 , the radio frequency signal Rf ina1_2 is decomposed into two radio frequency signals Rf ina2_1 and Rf ina2_2 by the seventh bridge TG, the radio frequency signal Rf ina2_1 is input to the driving amplifier Q a_2 , and the radio frequency signal Rf ina2_2 is input to the driving amplifier Q a_3 . The remaining working principle of the power amplifier assembly shown in FIG. 18 can refer to Embodiment Seven, which is not described in detail herein.

[0168] In some embodiments, the structure of the power amplifier assembly in Embodiment Eleven can be deformed according to the structures of the power amplifier assemblies shown in other embodiments in the present application, so that the structure of the power amplifier assembly in Embodiment Eleven can have multiple structures, which are not described in detail herein.

[0169] Embodiment Twelve,

[0170] Fig. 19 is another schematic circuit structure diagram of the power amplifier assembly in the embodiment of the present application. Referring to Fig. 19, the present embodiment is a variation of the implementation in the eleventh embodiment, and the following only describes the differences between the present embodiment and the eleventh embodiment, and the same parts are not described herein.

[0171] In some embodiments, referring to Fig. 19, the power combining assembly 221a can also include an eighth bridge TH, the output end of the main amplifier M a_1 is connected to the isolated port of the eighth bridge TH, the output end of the auxiliary amplifier P a_1 is connected to the first balanced port of the eighth bridge TH, the output end of the auxiliary amplifier P a_2 is connected to the second balanced port of the eighth bridge TH, and the output port of the eighth bridge TH is connected to the isolated port I a of the combiner 210. Thus, the power amplifier 220 a can be implemented by using the LMBA power amplifier, which reduces the design difficulty and the production cost. Moreover, the load modulation ratio of the main amplifier M a_1 is 1, and the load remains constant, so the present embodiment has the characteristics of super wideband, high efficiency, and large backoff.

[0172] In some embodiments, referring to Fig. 19, the combiner 210 can include an input port I b_1 , and the combiner 210 can be configured as a circulator HB, the input port I b_1 of the combiner 210 is the input port of the circulator HB, the isolated port I a of the combiner 210 is the isolated port of the circulator HB, and the output port I c of the circulator is the output port of the circulator HB. Exemplarily, the output port of the eighth bridge TH is connected to the isolated port of the circulator HB. Thus, the combiner 210 can be implemented by using the circulator, which reduces the design difficulty and the production cost.

[0173] In some embodiments, referring to Fig. 19, the power amplifier 220 b_1 is connected to the input port (for example, the input port of the circulator HB) of the combiner 210, the power amplifier 220 b_1 has one driving input end, and the power amplifier assembly 200 can further include a second signal combining circuit 252, the input end of the second signal combining circuit 252 is connected to the input end of the second signal resolving circuit 242 and the driving input end other than the at least two driving input ends among the at least three driving input ends, for example, the input end of the second signal combining circuit 252 is connected to the input end of the second signal resolving circuit 242 and the input end of the driving amplifier Q a_1 . Moreover, the output end of the signal combining circuit is connected to the power amplifier 220b_1 The driving input end of the first signal decomposition circuit 241 is connected. In addition, the second signal synthesis circuit 252 is used for synthesizing and outputting the received radio frequency signal, which can reduce the number of link channels and is beneficial to saving link cost and area.

[0174] In some examples, the second signal synthesis circuit 252 can include a plurality of ninth bridges. For example, referring to FIG. 20, which is a schematic structural diagram of a second signal synthesis circuit in embodiments of the present application, the second signal synthesis circuit 252 can include three ninth bridges: a first ninth bridge TI1, a second ninth bridge TI2, a third ninth bridge TI3, and a microstrip line 252 a The first balanced port and the isolation port of the first ninth bridge TI1 are both connected to the input end of the driving amplifier Q a_1 , to receive the radio frequency signal Rf ina1_1 The second balanced port of the first ninth bridge TI1 is grounded, and the output port of the first ninth bridge TI1 is connected to the first balanced port of the third ninth bridge TI3 through the microstrip line 252 a The first balanced port of the second ninth bridge TI2 is grounded, and the second balanced port and the output port of the second ninth bridge TI2 are both connected to the input end of the driving amplifier Q a_2 , to receive the radio frequency signal Rf ina1_2 The second balanced port of the second ninth bridge TI2 is connected to the second balanced port of the third ninth bridge TI3. The isolation port of the third ninth bridge TI3 is grounded, and the output port of the third ninth bridge TI3 is connected to the input end (for example, the first balanced port of the first third bridge TC1) of the first signal decomposition circuit 241, to output the radio frequency signal Rf inc . Thus, the second signal synthesis circuit 252 is composed of the ninth bridge and the microstrip line 252 a , which can make the second signal synthesis circuit 252 relatively simple to implement, thereby reducing design difficulty and production cost. For example, the ninth bridge can be a 3dB bridge or a 5dB bridge with a characteristic impedance of 50 ohms. In addition, the phase of the microstrip line 252 a is β. Of course, the above is only an example of the specific structure of the second signal synthesis circuit 252, and in specific implementation, the specific structure of the second signal synthesis circuit 252 is not limited to the above structure provided in the embodiments of the present application, but can also be other structures known to those skilled in the art, which are not limited herein.

[0175] In some embodiments, referring to FIG. 19, the power amplifier 220 b_1 is connected to the input port I b_1 (for example, the input port of the circulator HB) of the combiner 210, and the power amplifier 220 b_1 includes a single-tube power amplifier D b_1Single-tube power amplifier D b_1 The input terminal is used to receive radio frequency signal Rf inb_1 Single-tube power amplifier D b_1 The output terminal is connected to the input port I of the combiner 210. b_1 (For example, the input port of the circulator HB) is connected. This allows the power amplifier 220 to be connected. b_1 A single-tube power amplifier is used to reduce design complexity and production costs.

[0176] For example, referring to FIG19, power amplifier 220 b_1 As a second power amplifier, the drive unit 230 b_1 This is the second drive unit. Drive unit 230 can be used. b_1 It has one drive input terminal and one drive output terminal. Furthermore, the drive unit 230 b_1 It may include the driver amplifier Q b_1 and impedance matching circuit Z b_1 , drive amplifier Q b_1 The output terminal and the input terminal Z of the impedance matching circuit. b_1 Connect, and drive the input terminal Q of the amplifier. b_1 For drive unit 230 b_1 The drive input terminal is used to receive the radio frequency signal Rf. inc Impedance matching circuit Z b_1 The output terminal is the drive unit 230 b_1 The drive output terminal, so that the impedance matching circuit Z b_1 The output terminal is connected to the single-tube power amplifier D. b_1 The input terminals are connected. This configuration effectively increases the gain of both the main amplifier and the auxiliary amplifier, improving the efficiency of the link. Furthermore, it drives the amplifier Q... b_1 With single-tube power amplifier D b_1 An impedance matching circuit Z is used between them. b_1 They are connected to achieve impedance matching. For example, impedance matching circuit Z... b_1 It can be composed of one or more discrete components such as capacitors, inductors, resistors, and microstrip lines, or an impedance matching circuit Z. b_1 It can also be an integrated IPD chip circuit to drive the Q amplifier. b_1 Output to single-tube power amplifier D b_1 The input fundamental and harmonic frequencies are matched. Furthermore, the second drive unit and its connected second power amplifier can be either a separate power amplifier package or an unpackaged power amplifier die. Additionally, the drive amplifier Q... b_1 It can be a single-transistor power amplifier, or a driver amplifier Q. b_1A Doherty power amplifier or other high efficiency circuit architecture can also be used.

[0177] For example, referring to FIG. 19, when the power amplifier assembly 200 is working, the second signal synthesis circuit 252 receives a radio frequency signal Rf ina1_1 and Rf ina1_2 , outputs a radio frequency signal Rf inc , and the radio frequency signal Rf inc is amplified by the driver amplifier Q b_1 to a radio frequency signal Rf inb_1 , and then output to the single tube power amplifier D b_1 through the impedance matching circuit Z b_1 . The radio frequency signal Rf inb_1 is power amplified by the single tube power amplifier D b_1 and output to the input port of the circulator HB. The second signal decomposition circuit 242 can directly receive a radio frequency signal Rf ina1_2 , and the radio frequency signal Rf ina1_2 is decomposed into two radio frequency signals Rf ina2_1 and Rf ina2_2 by the seventh bridge TG, and the radio frequency signal Rf ina2_1 is amplified by the driver amplifier Q a_2 to a radio frequency signal Rf ina_2 , and then output to the auxiliary amplifier P a_2 through the impedance matching circuit Z a_1 . The radio frequency signal Rf ina_2 is power amplified by the auxiliary amplifier P a_1 and output to the first balanced port of the eighth bridge TH. The radio frequency signal Rf ina2_2 is amplified by the driver amplifier Q a_3 to a radio frequency signal Rf ina_3 , and then output to the auxiliary amplifier P a_3 through the impedance matching circuit Z a_2 . The radio frequency signal Rf ina_3 is power amplified by the auxiliary amplifier P a_2 and output to the second balanced port of the eighth bridge TH. The radio frequency signal Rf ina1_1 is amplified by the driver amplifier Q a_1 to a radio frequency signal Rf ina_1 , and then output to the main amplifier M a_1 through the impedance matching circuit Z a_1 . The radio frequency signal Rf ina_1 is power amplified by the main amplifier M a_1 and output to the isolation port of the eighth bridge TH, and the eighth bridge TH outputs the received radio frequency signals to the isolation port of the circulator HB after combining. Moreover, the main amplifier M a_1 is biased as class AB, and the auxiliary amplifier Pa_1 and P a_2 Bias as light C class, single tube power amplifier D b_1 Bias as deep C class. When the input radio frequency signal Rf ina1_1 and Rf ina1_2 power is small, auxiliary amplifier P a_1 and P a_2 , and single tube power amplifier D b_1 are in the off state, the main amplifier M a_1 works, as the radio frequency signal Rf ina1_1 and Rf ina1_2 power increases, the main amplifier M a_1 reaches voltage saturation, so the first high efficiency point appears as the output power increases. After that, as the radio frequency signal Rf ina1_1 and Rf ina1_2 power increases, auxiliary amplifier P a_1 and P a_2 start working, as the radio frequency signal Rf ina1_1 and Rf ina1_2 power increases, auxiliary amplifier P a_1 and P a_2 reach voltage saturation, so the second high efficiency point appears as the output power increases. After that, as the radio frequency signal Rf ina1_1 and Rf ina1_2 power increases, single tube power amplifier D b_1 starts working, when single tube power amplifier D b_1 reaches voltage saturation, main amplifier M a_1 , auxiliary amplifier P a_1 and P a_2 , and single tube power amplifier D b_1 all work in high efficiency state, so the third high efficiency point appears as the output power increases, and the maximum power output is realized. Thus, high efficiency in a large backoff power interval is realized. And, on the basis of ensuring a large backoff range of -15dB-0dB, the efficiency pit problem can be improved, and the overall power amplifier assembly efficiency is improved.

[0178] In some embodiments, the structure of the power amplifier assembly in embodiment twelve can be deformed according to the structure of the power amplifier assembly shown in other embodiments in this application, so that the structure of the power amplifier assembly in embodiment twelve can have multiple, which will not be described here.

[0179] Embodiment thirteen,

[0180] Figure 21 is another circuit structure schematic of the power amplifier assembly in the embodiment of the present application. Referring to Figure 21, the present embodiment is a variation of the implementation in Embodiment Ten. The differences between the present embodiment and Embodiment Ten will be described below, and the same parts will not be described again.

[0181] In some embodiments, referring to Figure 21, the power amplifier 220 b_1 includes two single-tube power amplifiers D b_1 and D b_2 and microstrip lines 411 b_1 and 411 b_2 The output of the single-tube power amplifier D b_1 is connected to the first end of the microstrip line 411 b_1 , the output of the single-tube power amplifier D b_2 is connected to the first end of the microstrip line 411 b_2 , the second end of the microstrip line 411 b_1 is connected to the second end of the microstrip line 411 b_2 and the input port I b_1 (e.g. the first balanced port of the first bridge) of the combiner 210. And, the power amplifier 220 b_2 includes two single-tube power amplifiers D b_3 and D b_4 and microstrip lines 411 b_3 and 411 b_4 The output of the single-tube power amplifier D b_3 is connected to the first end of the microstrip line 411 b_3 , the output of the single-tube power amplifier D b_4 is connected to the first end of the microstrip line 411 b_4 , the second end of the microstrip line 411 b_3 is connected to the second end of the microstrip line 411 b_4 and the input port I b_2 (e.g. the second balanced port of the first bridge) of the combiner 210. In other embodiments, the power amplifier connected to the input port of the combiner can also include three, four or more single-tube power amplifiers for simultaneous operation. The specific implementation can refer to the Silonex power amplifier, which will not be described again here.

[0182] The power amplifier 220 b_1 is set as the second power amplifier, the driving unit 230 b_1 is the second driving unit, the driving unit 230 b_1 has one driving input, and the driving unit 230 b_1 may include a driving amplifier Q b_1 and a power distribution assembly F b_1, drive amplifier Q b_1 Output terminal and power distribution component F b_1 The input terminal is connected. Therefore, the driver amplifier Q is... b_1 The input terminal can be the drive unit 230 b_1 The drive input terminal then drives amplifier Q. b_1 The input terminal can receive radio frequency signal Rf inb1_1 Power distribution component F b_1 The power distribution component F has multiple output terminals. b_1 One output terminal is the drive unit 230 b_1 One of the drive output terminals, and the power distribution component F b_1 Used to drive amplifier Q b_1 The output RF signal is divided into multiple RF signals and output through different output terminals. Therefore, a single driver amplifier Q can be used. b_1 and power distribution component F b_1 To drive the main amplifier M b_1 and auxiliary amplifier P b_1 This helps save space.

[0183] Power Amplifier 220 b_2 It is also configured as a second power amplifier, drive unit 230 b_2 It is also configured as the second drive unit, which can enable drive unit 230 b_2 It has a drive input terminal, and the drive unit 230 b_2 It may include the driver amplifier Q b_2 and power distribution component F b_2 , drive amplifier Q b_2 Output terminal and power distribution component F b_2 The input terminal is connected. Therefore, the driver amplifier Q is... b_2 The input terminal can be the drive unit 230 b_2 The drive input terminal then drives amplifier Q. b_2 The output terminal can receive radio frequency signal Rf inb1_2 Power distribution component F b_2 The power distribution component F has multiple output terminals. b_2 One output terminal is the drive unit 230 b_2 One of the drive output terminals, and the power distribution component F b_2 Used to drive amplifier Q b_2 The output RF signal is divided into multiple RF signals and output through different output terminals. Therefore, a single driver amplifier Q can be used. b_2 and power distribution component F b_2 To drive the main amplifier M b_2 and auxiliary amplifier Pb_2 It is beneficial to save area.

[0184] Wherein, the power distribution component F b_1 and F b_2 The embodiments can refer to example five, and specific details are not described here.

[0185] Exemplarily, referring to FIG. 16a, when the input radio frequency signal Rf ina_1 and Rf inb_2 The power is small, the auxiliary amplifier P a_1 and single tube power amplifier D b_1 to D b_4 are in the off state, the main amplifier M a_1 works, as the power of radio frequency signal Rf ina_1 and Rf ina_2 increases, the main amplifier M a_1 reaches voltage saturation, so that the first high efficiency point appears with the increase of output power. Then, as the power of radio frequency signal Rf ina_1 and Rf ina_2 increases, the auxiliary amplifier P a_1 starts to work, as the power of radio frequency signal Rf ina_1 and Rf ina_2 increases, the auxiliary amplifier P a_1 reaches voltage saturation, so that the second high efficiency point appears with the increase of output power. Then, as the power of radio frequency signal Rf ina_1 and Rf ina_2 increases, the single tube power amplifier D b_1 to D b_4 starts to work at the same time, because the single tube power amplifier D b_1 to D b_4 starts to work, the output efficiency first decreases and then increases, finally the main amplifier M a_1 , auxiliary amplifier P a_1 , single tube power amplifier D b_1 to D b_4 all work in high efficiency state, so that the third high efficiency point appears with the increase of output power, and the maximum power output is realized. Thus, high efficiency in a large backoff power interval is realized. Moreover, on the basis of ensuring a large backoff range of-15dB-0dB, the efficiency pit problem can be improved, and the overall power amplifier component efficiency is improved. In addition, the remaining working principle of the power amplifier component shown in FIG. 21 can refer to example ten, and specific details are not described here.

[0186] In some embodiments, the structure of the power amplifier assembly in Embodiment Thirteen can be modified according to the structure of the power amplifier assembly shown in other embodiments in this application, so that the structure of the power amplifier assembly in Embodiment Thirteen can have various forms, which are not described in detail here.

[0187] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed in the present application, which shall be covered within the protection scope of the present application.

Claims

1. A power amplifier assembly, characterized by The application relates to a power amplifier assembly. The power amplifier assembly comprises a combiner and a plurality of power amplifiers, the input ends of the plurality of power amplifiers are used for receiving radio frequency signals, the output ends of part of the power amplifiers in the plurality of power amplifiers are connected with isolated ports of the combiner, the output ends of the rest of the power amplifiers are connected with input ports of the combiner, and the output port of the combiner is used for outputting radio frequency signals. The plurality of power amplifiers comprises at least one first power amplifier, the first power amplifier is provided with a main amplifier, an auxiliary amplifier and a power combination component, the input ends of the main amplifier and the auxiliary amplifier respectively receive radio frequency signals with different phases, and the output ends of the main amplifier and the auxiliary amplifier are connected with the combiner through the power combination component.

2. The power amplifier assembly of claim 1, wherein, The power amplifier connected with the isolated port of the combiner is the first power amplifier.

3. The power amplifier assembly of claim 2, wherein, The combiner has at least one input port, and the power amplifier connected with at least one input port comprises the first power amplifier, a single-tube power amplifier or a plurality of single-tube power amplifiers which are used for simultaneous operation.

4. The power amplifier assembly of claim 1, wherein, The power amplifier connected with the isolated port of the combiner comprises a single-tube power amplifier or a plurality of single-tube power amplifiers which are used for simultaneous operation.

5. The power amplifier assembly of claim 4, wherein, The combiner has at least one input port, and the power amplifier connected with at least one input port is the first power amplifier.

6. The power amplifier assembly of any of claims 1-5, wherein, The combiner is a first electric bridge, the combiner has two input ports, one input port of the combiner is a first balanced port of the first electric bridge, another input port of the combiner is a second balanced port of the first electric bridge, the isolated port of the combiner is an isolated port of the first electric bridge, and the output port of the combiner is an output port of the first electric bridge.

7. The power amplifier assembly of any of claims 1-5, wherein, The combiner is a circulator, the combiner comprises one input port, the input port of the combiner is an input port of the circulator, the isolated port of the combiner is an isolated port of the circulator, and the output port of the combiner is an output port of the circulator.

8. The power amplifier assembly of any of claims 1-7, wherein, The power amplifier assembly further comprises a plurality of driving units, the driving input ends of the plurality of driving units are used for receiving radio frequency signals, the driving output ends of the plurality of driving units are connected with the input ends of the plurality of power amplifiers in correspondence, and the plurality of driving units are respectively used for outputting the received radio frequency signals after amplification. The driving unit connected with the first power amplifier is a first driving unit, the first driving unit has a plurality of driving output ends which are different, and the input end of the main amplifier and the input end of the auxiliary amplifier are respectively connected with different driving output ends.

9. The power amplifier assembly of claim 8, wherein, The first driving unit has a plurality of driving input ends, the first driving unit comprises a plurality of first driving branches, each first driving branch comprises a driving amplifier and an impedance matching circuit, and the output end of the driving amplifier is connected with the input end of the impedance matching circuit. An input terminal of a drive amplifier in one of the first drive branches is a drive input terminal, and an output terminal of an impedance matching circuit in one of the first drive branches is a drive output terminal.

10. The power amplifier assembly of claim 8, wherein, The first drive unit has a drive input terminal, and the first drive unit comprises a drive amplifier and a power distribution component, an output terminal of the drive amplifier and an input terminal of the power distribution component are connected; An input terminal of the drive amplifier is the drive input terminal of the first drive unit, the power distribution component has different output terminals, one of the output terminals of the power distribution component is a drive output terminal, and the power distribution component is configured to divide the radio frequency signal output by the drive amplifier into multiple radio frequency signals and output the radio frequency signals through different output terminals.

11. The power amplifier assembly of any of claims 8-10, wherein, The power amplifier other than the first power amplifier in the multiple power amplifiers is a second power amplifier, and the drive unit connected to the second power amplifier is a second drive unit; The second power amplifier is a single-tube power amplifier, the second drive unit has a drive input terminal and a drive output terminal, the second drive unit comprises a drive amplifier and an impedance matching circuit, an output terminal of the drive amplifier and an input terminal of the impedance matching circuit are connected, an input terminal of the drive amplifier is the drive input terminal of the second drive unit, and an output terminal of the impedance matching circuit is the drive output terminal of the second drive unit; Alternatively, multiple single-tube power amplifiers are arranged in the second power amplifier, the second drive unit has different drive input terminals and different drive output terminals, the second drive unit comprises multiple second drive branches, each of the second drive branches comprises a drive amplifier and an impedance matching circuit, an output terminal of the drive amplifier and an input terminal of the impedance matching circuit are connected, an input terminal of the drive amplifier in one of the second drive branches is one of the drive input terminals of the second drive unit, and an output terminal of the impedance matching circuit in one of the second drive branches is one of the drive output terminals of the second drive unit; Alternatively, multiple single-tube power amplifiers are arranged in the second power amplifier, the second drive unit has a drive input terminal and different drive output terminals, the second drive unit comprises a drive amplifier and a power distribution component, an output terminal of the drive amplifier and an input terminal of the power distribution component are connected, an input terminal of the drive amplifier is the drive input terminal of the second drive unit, the power distribution component has different output terminals, one of the output terminals of the power distribution component is one of the drive output terminals of the second drive unit, and the power distribution component is configured to divide the radio frequency signal output by the drive amplifier into multiple radio frequency signals and output the radio frequency signals through different output terminals.

12. The power amplifier assembly of any of claims 8-11, wherein, The power amplifier component further comprises a first signal decomposition circuit, an input terminal of the first signal decomposition circuit is configured to receive a radio frequency signal, and output terminals of the first signal decomposition circuit are connected to at least part of the drive input terminals of at least part of the drive units. The total number of the radio frequency signals received by the first signal decomposition circuit is less than the total number of the radio frequency signals received by the power unit connected to the first signal decomposition circuit, and the first signal decomposition circuit is configured to output the received radio frequency signals after decomposition.

13. The power amplifier assembly of claim 12, wherein, The driving unit connected to the first signal decomposition circuit is connected to the power amplifier connected to the input port of the combiner.

14. The power amplifier assembly of claim 13, wherein, The combiner has two input ports, and the driving unit connected to the power amplifier connected to each input port of the combiner has two driving input terminals.

15. The power amplifier assembly of claim 13, wherein, The first signal decomposition circuit includes a first third bridge, a second third bridge, and a third third bridge. The first balanced port of the first third bridge is configured to receive a radio frequency signal, the second balanced port of the first third bridge is grounded, the isolation port of the first third bridge is connected to the first balanced port of the second third bridge, and the output port of the first third bridge is connected to the first balanced port of the third third bridge. The second balanced port of the second third bridge is grounded, and the isolation port and the output port of the second third bridge are respectively connected to the two driving input terminals of one of the driving units. The second balanced port of the third third bridge is grounded, and the isolation port and the output port of the third third bridge are respectively connected to the two driving input terminals of another driving unit.

16. The power amplifier assembly of any of claims 12-15, wherein, The driving unit connected to the power amplifier connected to the isolation port of the combiner has different driving input terminals. The power amplifier assembly further includes a first signal synthesis circuit, the input terminals of the first signal synthesis circuit are respectively connected to the driving input terminals, the output terminal of the first signal synthesis circuit is connected to the input terminal of the first signal decomposition circuit, and the first signal synthesis circuit is configured to output the received radio frequency signals after synthesis.

17. The power amplifier assembly of claim 9, wherein, The power amplifier connected to the isolation port of the combiner is the first power amplifier, and the first driving unit corresponding to the first power amplifier connected to the isolation port of the combiner has at least three driving output terminals. The power amplifier assembly further includes a second signal decomposition circuit, the input terminal of the second signal decomposition circuit is configured to receive a radio frequency signal, the output terminal of the second signal decomposition circuit is connected to at least two driving input terminals of the at least three driving output terminals, and the second signal decomposition circuit is configured to output the received radio frequency signals after decomposition.

18. The power amplifier assembly of claim 17, wherein, The combiner includes an input port, and the driving unit corresponding to the power amplifier connected to the input port of the combiner has one driving input terminal. The power amplifier assembly further comprises a second signal synthesis circuit, input ends of the second signal synthesis circuit are connected with input ends of the second signal decomposition circuit and driving input ends of the at least three driving output ends except the at least two driving input ends, an output end of the signal synthesis circuit is connected with a driving input end of a driving unit corresponding to a power amplifier connected with an input port of the combiner, and the second signal synthesis circuit is used for synthesizing the received radio frequency signal and outputting.

19. A method of power amplification using the power amplifier assembly of any one of claims 1-18, wherein, Comprising: Each of the power amplifiers amplifies the radio frequency signal and outputs through the combiner; Wherein, when the first power amplifier performs the power amplification, the main amplifier performs the power amplification first, and the auxiliary amplifier performs the power amplification later.

20. A radio remote unit, comprising: Comprising: A communication interface, a filter, and the power amplifier assembly according to any one of claims 1-18; Input ends of the plurality of power amplifiers in the power amplifier assembly are connected with the communication interface, and an output end of the power amplifier assembly is connected with an input end of the filter.

21. A communications device, comprising: Comprising: A baseband unit and the radio frequency remote unit according to claim 20, wherein the radio frequency remote unit is connected with the baseband unit.

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