Power amplifier device, remote radio unit, and base station

Abstract

The present application provides a power amplifier device, a remote radio unit, and a base station. The power amplifier device comprises: a first power amplifier circuit, a second power amplifier circuit, a third power amplifier circuit, a first coupler, a second coupler, and a third coupler. A first signal is input to an input end of the first power amplifier circuit, and an output end of the first power amplifier circuit is connected to an isolation end of the third coupler; the first coupler is arranged on the second power amplifier circuit, a second signal is input to an input end of the first coupler, and a balanced end of the first coupler is connected to a balanced end of the third coupler; the second coupler is arranged on the third power amplifier circuit, a third signal is input to an input end of the second coupler, a balanced end of the second coupler is connected to the balanced end of the third coupler, and the third coupler performs power combination on signals input from the isolation end and the balanced end of the third coupler and then outputs the combined signal. The power amplifier device provided in the present application can ensure the broadband characteristics of power amplifiers while satisfying the high-efficiency operation of the power amplifiers.

Description

Power amplifier device, radio frequency remote unit and base station

[0001] The present application claims priority to the Chinese patent application No. 202411311821.7, filed on September 19, 2024, and entitled "Power amplifier device, radio frequency remote unit and base station", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of communication devices, and more specifically, to a power amplifier device, a radio frequency remote unit and a base station. BACKGROUND

[0003] As a main energy-consuming component in a base station, the working efficiency of a power amplifier (PA) is very important for the energy consumption of the entire base station. At present, the back-off design of the PA can be realized by load pulling, so that the working efficiency of the PA can still be kept high in the interval after power saturation. However, the current PA architecture restricts the wideband characteristics of the PA. SUMMARY

[0004] Embodiments of the present application provide a power amplifier device, a radio frequency remote unit and a base station, which can meet the high-efficiency working of the PA while ensuring the wideband characteristics of the PA.

[0005] In a first aspect, a power amplifier device is provided, comprising: a first power amplifier circuit, a second power amplifier circuit, a third power amplifier circuit, a first coupler, a second coupler, and a third coupler, an input end of the first power amplifier circuit being configured to input a first signal, the first coupler being disposed on the second power amplifier circuit, an input end of the first coupler being configured to input a second signal, an isolation end of the first coupler being connected to a load, the second coupler being disposed on the third power amplifier circuit, an input end of the second coupler being configured to input a third signal, an isolation end of the second coupler being connected to the load, an output end of the first power amplifier circuit being connected to an isolation end of the third coupler, a balance end of the first coupler being connected to a balance end of the third coupler, a balance end of the second coupler being connected to the balance end of the third coupler, and the third coupler being configured to output a power-combined signal input from the isolation end of the third coupler and the balance end of the third coupler.

[0006] Specifically, the connection of the balance end of the first coupler to the balance end of the third coupler can be indirect connection of the balance end of the first coupler to the balance end of the third coupler through one or more other devices, and the connection of the balance end of the second coupler to the balance end of the third coupler can be direct connection of the balance end of the second coupler to the balance end of the third coupler.

[0007] Specifically, the input of the three signals (the first signal, the second signal, and the third signal) can be single-input or multi-input, which is not limited in the application.

[0008] The power amplifier device adopts the design of the multi-power amplifier circuit to generate at least three high-efficiency points, so that the power amplifier device can still work at high efficiency when the backoff is large, and the power amplifier device can combine the plurality of couplers used for power synthesis into a third coupler, so as to simplify the topology circuit and make the power amplifier device have optimal broadband characteristics.

[0009] In combination with the first aspect, in some implementations of the first aspect, the second power amplifier circuit includes a first amplification branch and a second amplification branch, the third power amplifier circuit includes a third amplification branch and a fourth amplification branch, and the balanced end of the first coupler is connected to the balanced end of the third coupler, including: the two balanced ends of the first coupler are connected to the input end of the first amplification branch and the input end of the second amplification branch, respectively, and the output end of the first amplification branch and the output end of the second amplification branch are connected to the balanced end of the third coupler; the balanced end of the second coupler is connected to the balanced end of the third coupler, including: the two balanced ends of the second coupler are connected to the input end of the third amplification branch and the input end of the fourth amplification branch, respectively, and the output end of the third amplification branch and the output end of the fourth amplification branch are connected to the balanced end of the third coupler.

[0010] For example, the output end of the first amplification branch and the output end of the second amplification branch connected to the balanced end of the third coupler can be that the output end of the first amplification branch and the output end of the second amplification branch are connected to different two balanced ends of the third coupler, respectively, and the output end of the third amplification branch and the output end of the fourth amplification branch are connected to different two balanced ends of the third coupler, respectively.

[0011] The first coupler, the second coupler, and the third coupler in the power amplifier device can be combined into a sequential load modulation balanced power amplifier (sLMBA) power amplifier circuit, and the new power amplifier architecture can ensure the broadband characteristics of the power amplifier while meeting the high-efficiency working of the power amplifier.

[0012] In some implementations of the first aspect, the third amplification branch includes a fifth amplification branch and a sixth amplification branch, the fourth amplification branch includes a seventh amplification branch and an eighth amplification branch, the balanced port of the second coupler is connected to a balanced port of a third coupler, and the first balanced port of the second coupler is connected to an input port of the fifth amplification branch, the second balanced port of the second coupler is connected to an input port of the sixth amplification branch, the third balanced port of the second coupler is connected to an input port of the seventh amplification branch, the fourth balanced port of the second coupler is connected to an input port of the eighth amplification branch, and the output port of the fifth amplification branch, the output port of the sixth amplification branch, the output port of the seventh amplification branch, and the output port of the eighth amplification branch are all connected to the balanced port of the third coupler.

[0013] For example, the output port of the fifth amplification branch, the output port of the sixth amplification branch, the output port of the seventh amplification branch, and the output port of the eighth amplification branch are all connected to the balanced port of the third coupler can be that the output port of the fifth amplification branch, the output port of the sixth amplification branch, the output port of the seventh amplification branch, and the output port of the eighth amplification branch are respectively connected to four different balanced ports of the third coupler.

[0014] The third coupler in the power amplifier device is an eight-port coupler, which can perform power synthesis on signals output by the first power amplifier circuit, the second power amplifier circuit, and the third power amplifier circuit, thereby simplifying the topology circuit and reducing the circuit size.

[0015] In some implementations of the first aspect, a first peak value amplifier is disposed on the first amplification branch, a second peak value amplifier is disposed on the second amplification branch, a third peak value amplifier is disposed on the fifth amplification branch, a fourth peak value amplifier is disposed on the sixth amplification branch, a fifth peak value amplifier is disposed on the seventh amplification branch, and a sixth peak value amplifier is disposed on the eighth amplification branch, and the first peak value amplifier, the third peak value amplifier, and the fourth peak value amplifier are packaged in a three-channel device, and the second peak value amplifier, the fifth peak value amplifier, and the sixth peak value amplifier are packaged in a three-channel device.

[0016] Additionally, a main amplifier is disposed on the first power amplifier circuit, and the main amplifier can be separately packaged.

[0017] The power amplifier device can reduce the circuit size.

[0018] In some implementations of the first aspect, the first power amplifier circuit includes a fifth amplification branch and a sixth amplification branch, the first amplification branch is provided with a first peak amplifier, the second amplification branch is provided with a second peak amplifier, the third amplification branch is provided with a third peak amplifier, the fourth amplification branch is provided with a fourth peak amplifier, the fifth amplification branch is provided with a first main amplifier, and the sixth amplification branch is provided with a second main amplifier, the first peak amplifier and the second peak amplifier are packaged in a two-channel device, the third peak amplifier and the fourth peak amplifier are packaged in a two-channel device, and the first main amplifier and the second main amplifier are packaged in a two-channel device.

[0019] The power amplifier device can reduce the circuit size, reduce the number of packaged devices, and avoid cross-wiring.

[0020] In some implementations of the first aspect, the first power amplifier circuit includes a fifth amplification branch and a sixth amplification branch, the first amplification branch is provided with a first peak amplifier, the second amplification branch is provided with a second peak amplifier, the third amplification branch is provided with a third peak amplifier, the fourth amplification branch is provided with a fourth peak amplifier, the fifth amplification branch is provided with a first main amplifier, and the sixth amplification branch is provided with a second main amplifier, the first peak amplifier and the second peak amplifier are packaged in a two-channel device, the third peak amplifier and the fourth peak amplifier are packaged in a two-channel device, and the first main amplifier and the second main amplifier are packaged in a two-channel device.

[0021] The power amplifier device is packaged with two-channel devices, which can normalize the packaging of amplifiers.

[0022] In some implementations of the first aspect, the power amplifier device further includes a first splitter and a second splitter, the third amplification branch includes a first branch and a second branch, the fourth amplification branch includes a third branch and a fourth branch, the balanced end of the second coupler is connected to the balanced end of the third coupler, and the first balanced end of the second coupler is connected to the input end of the third peak amplifier, the output end of the third peak amplifier is connected to the input end of the first splitter, the two output ends of the first splitter are respectively connected to the input end of the first branch and the input end of the second branch, and the output end of the first branch and the output end of the second branch are connected to the balanced end of the third coupler; the second balanced end of the second coupler is connected to the input end of the fourth peak amplifier, the output end of the fourth peak amplifier is connected to the input end of the second splitter, the two output ends of the second splitter are respectively connected to the input end of the third branch and the input end of the fourth branch, and the output end of the third branch and the output end of the fourth branch are connected to the balanced end of the third coupler.

[0023] For example, the output end of the first branch and the output end of the second branch are connected to the balanced end of the third coupler, and the output end of the third branch and the output end of the fourth branch are connected to the balanced end of the third coupler, which can be that the output end of the first branch, the output end of the second branch, the output end of the third branch and the output end of the fourth branch are respectively connected to four different balanced ends of the third coupler.

[0024] The first splitter and the second splitter in the power amplifier device can perform phase compensation on the signals output by the third peak amplifier and the fourth peak amplifier, so as to ensure the wideband characteristics of the power amplifier device.

[0025] In combination with the first aspect, in some implementations of the first aspect, the power amplifier device further includes a fourth coupler and a fifth coupler, the third amplification branch includes a fifth amplification branch and a sixth amplification branch, the balanced end of the second coupler is connected to the balanced end of the third coupler, and the first balanced end of the second coupler is connected to the input end of the fourth coupler, the isolation end of the fourth coupler is connected to a load, the two balanced ends of the fourth coupler are respectively connected to the input end of the fifth amplification branch and the input end of the sixth amplification branch, the output end of the fifth amplification branch and the output end of the sixth amplification branch are respectively connected to the two balanced ends of the fifth coupler, the output end of the first amplification branch is connected to the isolation end of the fifth coupler, the fifth coupler is configured to perform power synthesis on signals input from the two balanced ends of the fifth coupler and the isolation end of the fifth coupler and then output the signals, and the output end of the fifth coupler is connected to the balanced end of the third coupler.

[0026] The peak amplifiers between the two balanced ends of the fourth coupler and the two balanced ends of the fifth coupler in the power amplifier device and the peak amplifiers of the fifth coupler isolation end are combined into an sLMBA power amplifier circuit, and further, the first coupler, the second coupler, the third coupler, the fourth coupler and the fifth coupler can be combined into a stack-sLMBA power amplifier circuit. This new power amplifier architecture can ensure the wideband characteristics of the power amplifier while meeting the high-efficiency operation of the power amplifier.

[0027] In combination with the first aspect, in some implementations of the first aspect, the power amplifier device further includes a first circulator, the balanced end of the second coupler is connected to the balanced end of the third coupler, and the first balanced end of the second coupler is connected to the input end of the third amplification branch, the output end of the third amplification branch is connected to the input end of the first circulator, the output end of the first amplification branch is connected to the isolation end of the first circulator, the first circulator is configured to perform power synthesis on signals input from the input end of the first circulator and the isolation end of the first circulator and then output the signals, and the output end of the first circulator is connected to the balanced end of the third coupler.

[0028] The first coupler, the second coupler and the third coupler in the power amplifier device can be combined into an sLMBA power amplifier circuit, and the first circulator connected between the first coupler, the second coupler and the third coupler can form a sequential circulator load modulated amplifier (sCLMA) power amplifier circuit, so that the power amplifier device includes a hybrid circuit of the sLMBA power amplifier circuit and the sCLMA power amplifier circuit, and the new power amplifier architecture can ensure the broadband characteristics of the power amplifier while meeting the high-efficiency operation of the power amplifier.

[0029] With reference to the first aspect, in some implementations of the first aspect, the power amplifier device further includes a sixth coupler and a seventh coupler, the fourth amplification branch includes a seventh amplification branch and an eighth amplification branch, the balanced end of the second coupler is connected to the balanced end of the third coupler, and the power amplifier device further includes that the second balanced end of the second coupler is connected to the input end of the sixth coupler, the isolation end of the sixth coupler is connected to a load, the two balanced ends of the sixth coupler are respectively connected to the input end of the seventh amplification branch and the input end of the eighth amplification branch, the output end of the seventh amplification branch and the output end of the eighth amplification branch are respectively connected to the two balanced ends of the seventh coupler, the output end of the second amplification branch is connected to the isolation end of the seventh coupler, the seventh coupler is configured to perform power combination on signals input from the two balanced ends of the seventh coupler and the isolation end of the seventh coupler and then output the signals, and the output end of the seventh coupler is connected to the balanced end of the third coupler.

[0030] The peak amplifiers between the two balanced ends of the sixth coupler and the two balanced ends of the seventh coupler in the power amplifier device and the peak amplifiers of the isolation end of the seventh coupler are combined into an sLMBA power amplifier circuit, and further, the first coupler, the second coupler, the third coupler, the sixth coupler and the seventh coupler can be combined into a stack-sLMBA power amplifier circuit, and the new power amplifier architecture can ensure the broadband characteristics of the power amplifier while meeting the high-efficiency operation of the power amplifier.

[0031] With reference to the first aspect, in some implementations of the first aspect, the power amplifier device further includes a second circulator, the balanced end of the second coupler is connected to the balanced end of the third coupler, and the power amplifier device further includes that the second balanced end of the second coupler is connected to the input end of the fourth amplification branch, the output end of the fourth amplification branch is connected to the input end of the second circulator, the output end of the second amplification branch is connected to the isolation end of the second circulator, the second circulator is configured to perform power combination on signals input from the input end of the second circulator and the isolation end of the second circulator and then output the signals, and the output end of the second circulator is connected to the balanced end of the third coupler.

[0032] The first coupler, the second coupler and the third coupler in the power amplifier device can be combined into an sLMBA power amplifier circuit, and the second circulator connected between the first coupler, the second coupler and the third coupler can form an sCLMA power amplifier circuit, so that the power amplifier device can include a hybrid circuit of the sLMBA power amplifier circuit and the sCLMA power amplifier circuit, and the new power amplifier architecture can ensure the broadband characteristics of the power amplifier while meeting the high-efficiency operation of the power amplifier.

[0033] In a second aspect, a power amplifier device is provided, which includes a first power amplifier circuit, a second power amplifier circuit, a third power amplifier circuit and a first circulator, an input end of the first power amplifier circuit is configured to input a first signal, an input end of the second power amplifier circuit is configured to input a second signal, an input end of the third power amplifier circuit is configured to input a third signal, an output end of the first power amplifier circuit is connected to an isolation end of the first circulator, an output end of the second power amplifier circuit and an output end of the third power amplifier circuit are connected to an input end of the first circulator, and the first circulator is configured to output power-combined signals input from the input end of the first circulator and the isolation end of the first circulator.

[0034] Specifically, the output end of the second power amplifier circuit connected to the input end of the first circulator can be an indirect connection of the output end of the second power amplifier circuit to the input end of the first circulator through one or more other devices, and the output end of the third power amplifier circuit connected to the input end of the first circulator can be an indirect connection of the output end of the third power amplifier circuit to the input end of the first circulator through one or more other devices.

[0035] Specifically, the input of the three signals (the first signal, the second signal and the third signal) can be a single-input mode or a multiple-input mode, which is not limited in the present application.

[0036] The power amplifier device adopts a multi-power amplifier circuit design to generate at least three high-efficiency points, so that the power amplifier device can still work with high efficiency when the backoff is large, and the power amplifier device can use a circulator as the last power-combining device, so that the power amplifier device has the best broadband characteristics.

[0037] In some implementations of the second aspect, the power amplifier device further comprises: a first coupler and a second coupler, the first coupler and the second coupler are arranged on the third power amplifier circuit, the third power amplifier circuit comprises a first amplification branch and a second amplification branch, an output end of the third power amplifier circuit is connected to an input end of the first circulator, the input end of the first coupler is configured to input the third signal, an isolation end of the first coupler is connected to the load, two balanced ends of the first coupler are respectively connected to an input end of the first amplification branch and an input end of the second amplification branch, an output end of the first amplification branch and an output end of the second amplification branch are respectively connected to two balanced ends of the second coupler, an output end of the second power amplifier circuit is connected to an isolation end of the second coupler, the second coupler is configured to output a power-combined signal input from the two balanced ends of the second coupler and the isolation end of the second coupler, and an output end of the second coupler is connected to the input end of the first circulator.

[0038] The power amplifier device can comprise an sLMBA power amplifier circuit and an sCLMA power amplifier circuit, thereby forming a hybrid circuit of the sLMBA power amplifier circuit and the sCLMA power amplifier circuit, and the new power amplifier architecture can ensure the wideband characteristics of the power amplifier while meeting the high-efficiency operation of the power amplifier.

[0039] In some implementations of the second aspect, the power amplifier device further comprises: a second circulator, an output end of the third power amplifier circuit is connected to an input end of the first circulator, the output end of the third power amplifier circuit is connected to an input end of the second circulator, an output end of the second power amplifier circuit is connected to an isolation end of the second circulator, the second circulator is configured to output a power-combined signal input from the input end of the second circulator and the isolation end of the second circulator, and an output end of the second circulator is connected to the input end of the first circulator.

[0040] The first circulator in the power amplifier device can form an sCLMA power amplifier circuit, and the second circulator can also form an sCLMA power amplifier circuit, so that the power amplifier device can form a stacked sCLMA power amplifier circuit (stack-sCLMA), and the new power amplifier architecture can ensure the wideband characteristics of the power amplifier while meeting the high-efficiency operation of the power amplifier.

[0041] In a third aspect, a radio remote unit is provided, the radio remote unit comprises the power amplifier device provided in any possible implementation of the first aspect or the power amplifier device provided in any possible implementation of the second aspect, and the radio remote unit further comprises a duplexer, one end of the duplexer is connected to the power amplifier device.

[0042] In a fourth aspect, a base station is provided, which comprises the remote radio unit and the antenna provided in the third aspect, and the remote radio unit is connected with the antenna, and the remote radio unit is configured to process signals received or transmitted by the antenna. BRIEF DESCRIPTION OF DRAWINGS

[0043] Fig. 1 is a schematic diagram of a power amplifier device 100 according to an embodiment of the present application.

[0044] Fig. 2 is a schematic diagram of another power amplifier device 200 according to an embodiment of the present application.

[0045] Fig. 3 is a schematic diagram of another power amplifier device 300 according to an embodiment of the present application.

[0046] Fig. 4 is a schematic diagram of another power amplifier device 400 according to an embodiment of the present application.

[0047] Fig. 5 is a curve of current, voltage, impedance and efficiency of the power amplifier device 400 varying with backoff power.

[0048] Fig. 6 is a schematic diagram of another power amplifier device 600 according to an embodiment of the present application.

[0049] Fig. 7 is a schematic diagram of another power amplifier device 700 according to an embodiment of the present application.

[0050] Fig. 8 is a schematic diagram of another power amplifier device 800 according to an embodiment of the present application.

[0051] Fig. 9 is a schematic diagram of another power amplifier device 900 according to an embodiment of the present application.

[0052] Fig. 10 is a schematic diagram of another power amplifier device 1000 according to an embodiment of the present application.

[0053] Fig. 11 is a schematic diagram of a remote radio unit and a base station according to an embodiment of the present application. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0055] It should be noted that the "connection" involved in the present application refers to direct or indirect connection. For example, A is connected with B, which can be direct connection between A and B, or indirect connection between A and B through one or more other devices, for example, direct connection between A and C and direct connection between C and B, so that A and B are connected through C.

[0056] The power amplifier device provided in the embodiments of the present application has a new power amplifier architecture, which comprises a first power amplifier circuit, a second power amplifier circuit, a third power amplifier circuit, a first coupler, a second coupler and a third coupler.

[0057] Specifically, the input end of the first power amplifier circuit is configured to input a first signal.

[0058] Specifically, the first coupler is arranged on the second power amplifier circuit, the input end of the first coupler is configured to input a second signal, and the isolation end of the first coupler is connected to the load.

[0059] Specifically, the second coupler is arranged on the third power amplifier circuit, the input end of the second coupler is configured to input a third signal, and the isolation end of the second coupler is connected to the load.

[0060] Specifically, the output end of the first power amplifier circuit is connected to the isolation end of the third coupler, the balanced end of the first coupler is connected to the balanced end of the third coupler, the balanced end of the second coupler is connected to the balanced end of the third coupler, and the third coupler is configured to output the power synthesis of the signals input from the isolation end of the third coupler and the balanced end of the third coupler.

[0061] FIG. 1 shows a schematic diagram of an example power amplifier device 100. The second power amplifier circuit included in the power amplifier device 100 includes a first amplification branch and a second amplification branch, and the third power amplifier circuit includes a third amplification branch and a fourth amplification branch, which can include a fifth amplification branch and a sixth amplification branch, and the fourth amplification branch can include a seventh amplification branch and an eighth amplification branch.

[0062] The first coupler included in the power amplifier device 100 can be a four-port coupler including one input end, one isolation end, and two balanced ends; the second coupler can be a six-port coupler including one input end, one isolation end, and four balanced ends; and the third coupler can be an eight-port coupler including one output end, one isolation end, and six balanced ends.

[0063] Specifically, the two balanced ends of the first coupler are connected to the input end of the first amplification branch and the input end of the second amplification branch, respectively. The four balanced ends of the second coupler are connected to the input end of the fifth amplification branch, the output end of the sixth amplification branch, the output end of the seventh amplification branch and the output end of the eighth amplification branch, respectively, for example, the first balanced end of the second coupler is connected to the input end of the fifth amplification branch, the second balanced end of the second coupler is connected to the input end of the sixth amplification branch, the third balanced end of the second coupler is connected to the input end of the seventh amplification branch, and the fourth balanced end of the second coupler is connected to the input end of the eighth amplification branch. The output end of the first amplification branch, the output end of the second amplification branch, the output end of the fifth amplification branch, the output end of the sixth amplification branch, the output end of the seventh amplification branch and the output end of the eighth amplification branch are all connected to the balanced end of the third coupler, for example, the output end of the first amplification branch is connected to the first balanced end of the third coupler, the output end of the second amplification branch is connected to the second balanced end of the third coupler, the output end of the fifth amplification branch is connected to the third balanced end of the third coupler, the output end of the sixth amplification branch is connected to the fourth balanced end of the third coupler, the output end of the seventh amplification branch is connected to the fifth balanced end of the third coupler, and the output end of the eighth amplification branch is connected to the sixth balanced end of the third coupler.

[0064] As shown in FIG. 1, the first power amplifier circuit is provided with a main amplifier (main), the first amplification branch is provided with a first peak value amplifier (denoted as “1”), the second amplification branch is provided with a second peak value amplifier (denoted as “2”), the fifth amplification branch is provided with a third peak value amplifier (denoted as “3”), the sixth amplification branch is provided with a fourth peak value amplifier (denoted as “4”), the seventh amplification branch is provided with a fifth peak value amplifier (denoted as “5”), and the eighth amplification branch is provided with a sixth peak value amplifier (denoted as “6”). It should be understood that the above-mentioned connection between the balanced end of the first coupler and the balanced end of the third coupler can be as follows: the first balanced end of the first coupler is connected to the input end of the first peak value amplifier, and the output end of the first peak value amplifier is connected to the first balanced end of the third coupler; the second balanced end of the first coupler is connected to the input end of the second peak value amplifier, and the output end of the second peak value amplifier is connected to the second balanced end of the third coupler. The above-mentioned connection between the balanced end of the second coupler and the balanced end of the third coupler can be as follows: the first balanced end of the second coupler is connected to the input end of the third peak value amplifier, and the output end of the third peak value amplifier is connected to the third balanced end of the third coupler; the second balanced end of the second coupler is connected to the input end of the fourth peak value amplifier, and the output end of the fourth peak value amplifier is connected to the fourth balanced end of the third coupler; the third balanced end of the second coupler is connected to the input end of the fifth peak value amplifier, and the output end of the fifth peak value amplifier is connected to the fifth balanced end of the third coupler; and the fourth balanced end of the second coupler is connected to the input end of the sixth peak value amplifier, and the output end of the sixth peak value amplifier is connected to the sixth balanced end of the third coupler.

[0065] Additionally, the power amplifier device provided by the embodiments of the present application can be packaged as follows:

[0066] Example 1: As shown in FIG. 1, the first peak amplifier, the third peak amplifier and the fourth peak amplifier can be packaged in a three-channel device, and the second peak amplifier, the fifth peak amplifier and the sixth peak amplifier can be packaged in a three-channel device, so as to reduce the circuit size. The main amplifier shown in FIG. 1 can be packaged separately.

[0067] Example 2: As shown in FIG. 2, the power amplifier device 200 can package the main amplifier, the first peak amplifier and the second peak amplifier in a three-channel device, and package the third peak amplifier, the fourth peak amplifier, the fifth peak amplifier and the sixth peak amplifier in a four-channel device, so as to not only reduce the circuit size and the number of packaged devices, but also avoid the crossing of wires.

[0068] Example 3: As shown in FIG. 3, the second power amplifier circuit included in the power amplifier device 300 includes a first amplification branch and a second amplification branch, the third power amplifier circuit can include a third amplification branch and a fourth amplification branch, and the first power amplifier circuit includes a fifth amplification branch and a sixth amplification branch.

[0069] Specifically, the first peak amplifier (denoted as “1”) is arranged on the first amplification branch, the second peak amplifier (denoted as “2”) is arranged on the second amplification branch, the third peak amplifier (denoted as “3”) is arranged on the third amplification branch, the fourth peak amplifier (denoted as “4”) is arranged on the fourth amplification branch, the first main amplifier (denoted as “main amplifier 1”) is arranged on the fifth amplification branch, and the second main amplifier (denoted as “main amplifier 2”) is arranged on the sixth amplification branch. The power amplifier device 300 can package the first peak amplifier and the second peak amplifier in a two-channel device, package the third peak amplifier and the fourth peak amplifier in a two-channel device, and package the first main amplifier and the second main amplifier in a two-channel device. The power amplifier device described in FIG. 3 uses a two-channel device for packaging, and the packaging of the amplifiers can be normalized.

[0070] Optionally, the power amplifier device 300 can further include a first splitter and a second splitter, the third amplification branch can include a first branch and a second branch, and the fourth amplification branch can include a third branch and a fourth branch.

[0071] The first coupler included in the power amplifier device 300 can be a four-port coupler including one input port, one isolation port, and two balanced ports; the second coupler can be a four-port coupler including one input port, one isolation port, and two balanced ports; and the third coupler can be an eight-port coupler including one output port, one isolation port, and six balanced ports.

[0072] Specifically, the two balanced ports of the first coupler are respectively connected to the input ports of the first and second amplification branches. The first balanced port of the second coupler is connected to the input port of the third amplification branch, and the second balanced port of the second coupler is connected to the input port of the fourth amplification branch. The output port of the third amplification branch is connected to the input port of the first splitter, and the two output ports of the first splitter are respectively connected to the input ports of the first and second branches. The output port of the fourth amplification branch is connected to the input port of the second splitter, and the two output ports of the second splitter are respectively connected to the input ports of the third and fourth branches. The output ports of the first amplification branch, the second amplification branch, the first branch, the second branch, the third branch, and the fourth branch are all connected to the balanced ports of the third coupler, for example, the output port of the first amplification branch is connected to the first balanced port of the third coupler, the output port of the second amplification branch is connected to the second balanced port of the third coupler, the output port of the first branch is connected to the third balanced port of the third coupler, the output port of the second branch is connected to the fourth balanced port of the third coupler, the output port of the third branch is connected to the fifth balanced port of the third coupler, and the output port of the fourth branch is connected to the sixth balanced port of the third coupler.

[0073] Alternatively, the two balanced ports of the first coupler can be respectively connected to the input ports of the first and second amplification branches. The first balanced port of the second coupler is connected to the input port of the third peak value amplifier, and the second balanced port of the second coupler is connected to the input port of the fourth peak value amplifier. The output port of the third peak value amplifier is connected to the input port of the first splitter, and the two output ports of the first splitter are respectively connected to the input ports of the first and second branches. The output port of the fourth peak value amplifier is connected to the input port of the second splitter, and the two output ports of the second splitter are respectively connected to the input ports of the third and fourth branches. The output ports of the first amplification branch, the second amplification branch, the first branch, the second branch, the third branch, and the fourth branch are all connected to the balanced ports of the third coupler, for example, the output port of the first amplification branch is connected to the first balanced port of the third coupler, the output port of the second amplification branch is connected to the second balanced port of the third coupler, the output port of the first branch is connected to the third balanced port of the third coupler, the output port of the second branch is connected to the fourth balanced port of the third coupler, the output port of the third branch is connected to the fifth balanced port of the third coupler, and the output port of the fourth branch is connected to the sixth balanced port of the third coupler.

[0074] Optionally, the power amplifier device 300 can further comprise a third splitter and a first combiner, the third splitter is configured to input the first path signal, two output ends of the third splitter are connected to input ends of the fifth amplification branch and the sixth amplification branch respectively, output ends of the fifth amplification branch and the sixth amplification branch are connected to an input end of the first combiner, the first combiner is configured to output power-combined signals input from the input end of the first combiner, and an output end of the first combiner is connected to the isolation end of the third coupler.

[0075] Alternatively, the third splitter can be configured to input the first path signal, a first output end of the third splitter is connected to an input end of the first main amplifier, an output end of the first main amplifier is connected to a first input end of the first combiner, a second output end of the third splitter is connected to an input end of the second main amplifier, an output end of the second main amplifier is connected to a second input end of the first combiner, the first combiner is configured to output power-combined signals input from the first input end and the second input end of the first combiner, and an output end of the first combiner is connected to the isolation end of the third coupler.

[0076] Exemplarily, the first splitter, the third splitter and the first combiner in the power amplifier device 300 can be a Balun, and the second splitter can be a power divider, which are not limited in the present application.

[0077] It should be noted that each amplifier in the power amplifier device provided by the embodiments of the present application can be replaced by a Doherty power amplifier circuit, a Chireix power amplifier circuit, an sLMBA power amplifier circuit, an sCLMA power amplifier circuit, etc., which are not limited in the present application.

[0078] Exemplarily, the third peak amplifier in the power amplifier device 300 described above can be replaced by an sLMBA1 power amplifier circuit, and the fourth peak amplifier can be replaced by an sLMBA2 power amplifier circuit, to obtain a power amplifier device 400 shown in FIG. 4.

[0079] The second power amplifier circuit included in the power amplifier device 400 comprises a first amplification branch and a second amplification branch, and the third power amplifier circuit can comprise a third amplification branch and a fourth amplification branch, the third amplification branch comprises a fifth amplification branch and a sixth amplification branch, and the fourth amplification branch comprises a seventh amplification branch and an eighth amplification branch.

[0080] The first coupler, the second coupler and the third coupler included in the power amplifier device 400 are all four-port couplers, the first coupler and the second coupler comprise one input end, one isolation end and two balanced ends, and the third coupler comprises one output end, one isolation end and two balanced ends.

[0081] The power amplifier device 400 further comprises a fourth coupler, a fifth coupler, a sixth coupler and a seventh coupler, the fourth coupler, the fifth coupler, the sixth coupler and the seventh coupler comprised by the power amplifier device 400 are all four-port couplers, the fourth coupler and the sixth coupler comprise one input port, one isolation port and two balanced ports, and the fifth coupler and the seventh coupler comprise one output port, one isolation port and two balanced ports.

[0082] Specifically, the two balanced ports of the first coupler are connected to the input port of the first amplification branch and the input port of the second amplification branch respectively.

[0083] Specifically, the first balanced port of the second coupler is connected to the input port of the fourth coupler, the isolation port of the fourth coupler is connected to the load, the two balanced ports of the fourth coupler are connected to the input port of the fifth amplification branch and the input port of the sixth amplification branch respectively, the output port of the fifth amplification branch and the output port of the sixth amplification branch are connected to the two balanced ports of the fifth coupler respectively, the output port of the first amplification branch is connected to the isolation port of the fifth coupler, and the output port of the fifth coupler is connected to the first balanced port of the third coupler. The second balanced port of the second coupler is connected to the input port of the sixth coupler, the isolation port of the sixth coupler is connected to the load, the two balanced ports of the sixth coupler are connected to the input port of the seventh amplification branch and the input port of the eighth amplification branch respectively, the output port of the seventh amplification branch and the output port of the eighth amplification branch are connected to the two balanced ports of the seventh coupler respectively, the output port of the second amplification branch is connected to the isolation port of the seventh coupler, and the output port of the seventh coupler is connected to the second balanced port of the third coupler.

[0084] As shown in FIG. 4, the first power amplifier circuit is provided with a main amplifier (main), the first amplification branch is provided with a first peak value amplifier (denoted as "1"), the second amplification branch is provided with a second peak value amplifier (denoted as "2"), the fifth amplification branch is provided with a third peak value amplifier (denoted as "3"), the sixth amplification branch is provided with a fourth peak value amplifier (denoted as "4"), the seventh amplification branch is provided with a fifth peak value amplifier (denoted as "5"), and the eighth amplification branch is provided with a sixth peak value amplifier (denoted as "6"). It should be understood that the balanced end of the first coupler is connected to the balanced end of the third coupler, which can be specifically as follows: the first balanced end of the first coupler is connected to the input end of the first peak value amplifier, the output end of the first peak value amplifier is connected to the isolation end of the fifth coupler, and the output end of the fifth coupler is connected to the first balanced end of the third coupler; the second balanced end of the first coupler is connected to the input end of the second peak value amplifier, the output end of the second peak value amplifier is connected to the isolation end of the seventh coupler, and the output end of the seventh coupler is connected to the second balanced end of the third coupler. The balanced end of the second coupler is connected to the balanced end of the third coupler, which can be specifically as follows: the first balanced end of the second coupler is connected to the input end of the fourth coupler, the isolation end of the fourth coupler is connected to the load, the first balanced end of the fourth coupler is connected to the input end of the third peak value amplifier, the output end of the third peak value amplifier is connected to the first balanced end of the fifth coupler, the second balanced end of the fourth coupler is connected to the input end of the fourth peak value amplifier, the output end of the fourth peak value amplifier is connected to the second balanced end of the fifth coupler, and the output end of the fifth coupler is connected to the first balanced end of the third coupler; the second balanced end of the second coupler is connected to the input end of the sixth coupler, the isolation end of the sixth coupler is connected to the load, the first balanced end of the sixth coupler is connected to the input end of the fifth peak value amplifier, the output end of the fifth peak value amplifier is connected to the first balanced end of the seventh coupler, the second balanced end of the sixth coupler is connected to the input end of the sixth peak value amplifier, the output end of the sixth peak value amplifier is connected to the second balanced end of the seventh coupler, and the output end of the seventh coupler is connected to the second balanced end of the third coupler.

[0085] Among them, the first coupler, the second coupler, the fourth coupler and the sixth coupler in the power amplifier device 400 are used for power distribution, and the third coupler, the fifth coupler and the seventh coupler are used for power synthesis.

[0086] Specifically, the main amplifier of the first power amplifier circuit is biased in AB class or B class, and the first power amplifier circuit works first; the first peak value amplifier and the second peak value amplifier of the second power amplifier circuit are biased in shallow C class, and the second power amplifier circuit works after the first power amplifier circuit; the third peak value amplifier, the fourth peak value amplifier, the fifth peak value amplifier and the sixth peak value amplifier of the third power amplifier circuit are biased in deep C class, and the third power amplifier circuit works after the second power amplifier circuit.

[0087] In an example, the first peak amplifier and the second peak amplifier of the second power amplifier circuit are power identical amplifiers and are simultaneously turned on, and the third peak amplifier, the fourth peak amplifier, the fifth peak amplifier and the sixth peak amplifier of the third power amplifier circuit are power identical amplifiers and are simultaneously turned on. FIG. 5 shows the curves of the current, the voltage, the impedance and the efficiency of the power amplifier device 400 with respect to the backoff power, wherein (a) of FIG. 5 shows an example of the curve of the current of the power amplifier device 400 with respect to the backoff power, (b) of FIG. 5 shows an example of the curve of the voltage of the power amplifier device 400 with respect to the backoff power, (c) of FIG. 5 shows an example of the curve of the impedance of the power amplifier device 400 with respect to the backoff power, and (d) of FIG. 5 shows an example of the curve of the efficiency of the power amplifier device 400 with respect to the backoff power. When the power of the input signal is small, the main amplifier of the first power amplifier circuit works in the AB class or the B class, and the main amplifier works first until the voltage saturation state and the current saturation state are reached, at which time the power amplifier device 400 reaches a first high-efficiency point; as the power of the input signal further increases, the main amplifier maintains the voltage saturation state and the current saturation state, the first peak amplifier and the second peak amplifier of the second power amplifier circuit are turned on and work until the first peak amplifier and the second peak amplifier reach the voltage saturation state and the current unsaturated state, at which time the power amplifier device 400 reaches a second high-efficiency point; as the power of the input signal further increases, the main amplifier maintains the voltage saturation state and the current saturation state, the first peak amplifier and the second peak amplifier of the second power amplifier circuit maintain the voltage saturation state and the current continues to increase until the current saturation state is reached, and the third peak amplifier, the fourth peak amplifier, the fifth peak amplifier and the sixth peak amplifier of the third power amplifier circuit are turned on and work until the third peak amplifier, the fourth peak amplifier, the fifth peak amplifier and the sixth peak amplifier reach the voltage saturation state and the current saturation state, at which time the power amplifier device 400 reaches a third high-efficiency point.

[0088] FIG. 5 exemplarily shows that the three high-efficiency points of the backoff power of the power amplifier device 400 are at -15 dB, -7.5 dB and 0 dB respectively, and the positions of the three high-efficiency points of the backoff power are not limited. The power of the main amplifier, the power of the first peak amplifier / second peak amplifier and the power of the third peak amplifier / fourth peak amplifier / fifth peak amplifier / sixth peak amplifier can be calculated as follows: the power of the main amplifier: the power of the first peak amplifier / second peak amplifier: the power of the third peak amplifier / fourth peak amplifier / fifth peak amplifier / sixth peak amplifier ≈ 1:4:5.67, and the load pull ratio (LPR) of the main amplifier is about 1, and the LPR of the first peak amplifier and the second peak amplifier is about 1.7. Therefore, the power levels of the amplifiers of the power amplifier device of the embodiments of the present application are less different, and the LPR is small, so that the power amplifier device provided by the embodiments of the present application can meet the high-efficiency working while also having the best broadband characteristics.

[0089] Additionally, the first peak amplifier and the second peak amplifier of the second power amplifier circuit can also be amplifiers with different powers, the first peak amplifier and the second peak amplifier of the second power amplifier circuit can also not be turned on at the same time, the third peak amplifier and the fourth peak amplifier of the third power amplifier circuit can be partially or entirely amplifiers with different powers, the third peak amplifier and the fourth peak amplifier of the third power amplifier circuit can also not be turned on at the same time, and the present application does not make a limitation in this regard.

[0090] It can be seen that the two peak amplifiers between the two balanced ports of the fourth coupler and the two balanced ports of the fifth coupler of the power amplifier device 400 shown in FIG. 4 and the peak amplifier connected with the isolated port of the fifth coupler can be combined into one sLMBA power amplifier circuit (denoted as “sLMBA1”), the two peak amplifiers between the two balanced ports of the sixth coupler and the two balanced ports of the seventh coupler and the peak amplifier connected with the isolated port of the seventh coupler can be combined into one sLMBA power amplifier circuit (denoted as “sLMBA2”), further, the first coupler, the second coupler and the third coupler can also be combined into an sLMBA power amplifier circuit, thus the power amplifier device 400 shown in FIG. 4 forms a stack-sLMBA power amplifier circuit.

[0091] Exemplarily, any sLMBA power amplifier circuit in the power amplifier device 400 shown in FIG. 4 can also be replaced by an sCLMA power amplifier circuit.

[0092] Example 1: the sLMBA1 power amplifier circuit in the power amplifier device 400 is replaced by an sCLMA1 power amplifier circuit, obtaining the power amplifier device 600 shown in FIG. 6.

[0093] The second power amplifier circuit included in the power amplifier device 600 includes a first amplification branch and a second amplification branch, and the third power amplifier circuit can include a third amplification branch and a fourth amplification branch, the fourth amplification branch including a seventh amplification branch and an eighth amplification branch.

[0094] The first coupler, the second coupler and the third coupler included in the power amplifier device 600 are all four-port couplers, the first coupler and the second coupler including one input port, one isolated port and two balanced ports, and the third coupler including one output port, one isolated port and two balanced ports.

[0095] The power amplifier device 600 further includes a first circulator, a sixth coupler and a seventh coupler, the sixth coupler and the seventh coupler included in the power amplifier device 600 are all four-port couplers, the sixth coupler including one input port, one isolated port and two balanced ports, and the seventh coupler including one output port, one isolated port and two balanced ports.

[0096] Specifically, the two balanced terminals of the first coupler are connected to the input terminal of the first amplification branch and the input terminal of the second amplification branch, respectively.

[0097] Specifically, the first balanced terminal of the second coupler is connected to the input terminal of the third amplification branch, the output terminal of the third amplification branch is connected to the input terminal of the first circulator, the output terminal of the first amplification branch is connected to the isolation terminal of the first circulator, the first circulator is configured to output the power combination of the signals input from the input terminal of the first circulator and the isolation terminal of the first circulator, and the output terminal of the first circulator is connected to the first balanced terminal of the third coupler. The second balanced terminal of the second coupler is connected to the input terminal of the sixth coupler, the isolation terminal of the sixth coupler is connected to the load, the two balanced terminals of the sixth coupler are connected to the input terminal of the seventh amplification branch and the input terminal of the eighth amplification branch, respectively, the output terminal of the seventh amplification branch and the output terminal of the eighth amplification branch are connected to the two balanced terminals of the seventh coupler, respectively, the output terminal of the second amplification branch is connected to the isolation terminal of the seventh coupler, and the output terminal of the seventh coupler is connected to the second balanced terminal of the third coupler.

[0098] As shown in FIG. 6, the first power amplifier circuit is provided with a main amplifier (main), the first amplification branch is provided with a first peak value amplifier (denoted as “1”), the second amplification branch is provided with a second peak value amplifier (denoted as “2”), the third amplification branch is provided with a third peak value amplifier (denoted as “3”), the seventh amplification branch is provided with a fourth peak value amplifier (denoted as “4”), and the eighth amplification branch is provided with a fifth peak value amplifier (denoted as “5”). It should be understood that the connection between the balanced terminals of the first coupler and the balanced terminals of the third coupler can be as follows: the first balanced terminal of the first coupler is connected to the input terminal of the first peak value amplifier, the output terminal of the first peak value amplifier is connected to the isolation terminal of the first circulator, and the output terminal of the first circulator is connected to the first balanced terminal of the third coupler; and the second balanced terminal of the first coupler is connected to the input terminal of the second peak value amplifier, the output terminal of the second peak value amplifier is connected to the isolation terminal of the seventh coupler, and the output terminal of the seventh coupler is connected to the second balanced terminal of the third coupler. The connection between the balanced terminals of the second coupler and the balanced terminals of the third coupler can be as follows: the first balanced terminal of the second coupler is connected to the input terminal of the third peak value amplifier, the output terminal of the third peak value amplifier is connected to the input terminal of the first circulator, and the output terminal of the first circulator is connected to the first balanced terminal of the third coupler; and the second balanced terminal of the second coupler is connected to the input terminal of the sixth coupler, the isolation terminal of the sixth coupler is connected to the load, the first balanced terminal of the sixth coupler is connected to the input terminal of the fourth peak value amplifier, the output terminal of the fourth peak value amplifier is connected to the first balanced terminal of the seventh coupler, the second balanced terminal of the sixth coupler is connected to the input terminal of the fifth peak value amplifier, the output terminal of the fifth peak value amplifier is connected to the second balanced terminal of the seventh coupler, and the output terminal of the seventh coupler is connected to the second balanced terminal of the third coupler.

[0099] Example 2: The sLMBA2 power amplifier circuit in the power amplifier device 400 is replaced by an sCLMA2 power amplifier circuit, and a power amplifier device 700 shown in FIG. 7 is obtained.

[0100] The second power amplifier circuit included in the power amplifier device 700 includes a first amplification branch and a second amplification branch, and the third power amplifier circuit can include a third amplification branch and a fourth amplification branch, the third amplification branch including a fifth amplification branch and a sixth amplification branch.

[0101] The first coupler, the second coupler, and the third coupler included in the power amplifier device 700 are all four-port couplers, the first coupler and the second coupler including one input end, one isolation end, and two balanced ends, and the third coupler including one output end, one isolation end, and two balanced ends.

[0102] The power amplifier device 700 further includes a second circulator, a fourth coupler, and a fifth coupler, the fourth coupler and the fifth coupler included in the power amplifier device 700 are both four-port couplers, the fourth coupler including one input end, one isolation end, and two balanced ends, and the fifth coupler including one output end, one isolation end, and two balanced ends.

[0103] Specifically, the two balanced ends of the first coupler are respectively connected to the input end of the first amplification branch and the input end of the second amplification branch.

[0104] Specifically, the first balanced end of the second coupler is connected to the input end of the fourth coupler, the isolation end of the fourth coupler is connected to a load, the two balanced ends of the fourth coupler are respectively connected to the input end of the fifth amplification branch and the input end of the sixth amplification branch, the output end of the fifth amplification branch and the output end of the sixth amplification branch are respectively connected to the two balanced ends of the fifth coupler, the output end of the first amplification branch is connected to the isolation end of the fifth coupler, and the output end of the fifth coupler is connected to the first balanced end of the third coupler. The second balanced end of the second coupler is connected to the input end of the fourth amplification branch, the output end of the fourth amplification branch is connected to the input end of the second circulator, the output end of the second amplification branch is connected to the isolation end of the second circulator, the second circulator is configured to output a power-combined signal input from the input end and the isolation end of the second circulator, and the output end of the second circulator is connected to the second balanced end of the third coupler.

[0105] As shown in FIG. 7, the first power amplifier circuit is provided with a main amplifier (main), the first amplification branch is provided with a first peak value amplifier (denoted as "1"), the second amplification branch is provided with a second peak value amplifier (denoted as "2"), the fifth amplification branch is provided with a third peak value amplifier (denoted as "3"), the sixth amplification branch is provided with a fourth peak value amplifier (denoted as "4"), and the fourth amplification branch is provided with a fifth peak value amplifier (denoted as "5"). It should be understood that the balanced end of the first coupler is connected to the balanced end of the third coupler, which can be specifically: the first balanced end of the first coupler is connected to the input end of the first peak value amplifier, the output end of the first peak value amplifier is connected to the isolation end of the fifth coupler, and the output end of the fifth coupler is connected to the first balanced end of the third coupler; the second balanced end of the first coupler is connected to the input end of the second peak value amplifier, the output end of the second peak value amplifier is connected to the isolation end of the second circulator, and the output end of the second circulator is connected to the second balanced end of the third coupler. The balanced end of the second coupler is connected to the balanced end of the third coupler, which can be specifically: the first balanced end of the second coupler is connected to the input end of the fourth coupler, the isolation end of the fourth coupler is connected to the load, the first balanced end of the fourth coupler is connected to the input end of the third peak value amplifier, the output end of the third peak value amplifier is connected to the first balanced end of the fifth coupler, the second balanced end of the fourth coupler is connected to the input end of the fourth peak value amplifier, the output end of the fourth peak value amplifier is connected to the second balanced end of the fifth coupler, and the output end of the fifth coupler is connected to the first balanced end of the third coupler; the second balanced end of the second coupler is connected to the input end of the fifth peak value amplifier, the output end of the fifth peak value amplifier is connected to the input end of the second circulator, and the output end of the second circulator is connected to the second balanced end of the third coupler.

[0106] Example 3: The sLMBA1 power amplifier circuit in the power amplifier device 400 is replaced by the sCLMA1 power amplifier circuit, and the sLMBA2 power amplifier circuit is replaced by the sCLMA2 power amplifier circuit, to obtain the power amplifier device 800 shown in FIG. 8.

[0107] The second power amplifier circuit included in the power amplifier device 800 includes a first amplification branch and a second amplification branch, and the third power amplifier circuit can include a third amplification branch and a fourth amplification branch.

[0108] The first coupler, the second coupler and the third coupler included in the power amplifier device 800 are all four-port couplers, the first coupler and the second coupler include one input end, one isolation end and two balanced ends, and the third coupler includes one output end, one isolation end and two balanced ends.

[0109] The power amplifier device 800 further includes a first circulator and a second circulator.

[0110] Specifically, the two balanced ends of the first coupler are connected to the input end of the first amplification branch and the input end of the second amplification branch, respectively.

[0111] Specifically, the first balanced end of the second coupler is connected to the input end of the third amplification branch, the output end of the third amplification branch is connected to the input end of the first circulator, the output end of the first amplification branch is connected to the isolated end of the first circulator, the first circulator is configured to output the power synthesis of the signals input from the input end of the first circulator and the isolated end of the first circulator, and the output end of the first circulator is connected to the first balanced end of the third coupler. The second balanced end of the second coupler is connected to the input end of the fourth amplification branch, the output end of the fourth amplification branch is connected to the input end of the second circulator, the output end of the second amplification branch is connected to the isolated end of the second circulator, the second circulator is configured to output the power synthesis of the signals input from the input end of the second circulator and the isolated end of the second circulator, and the output end of the second circulator is connected to the second balanced end of the third coupler.

[0112] As shown in FIG. 8, the first power amplifier circuit is provided with a main amplifier (main), the first amplification branch is provided with a first peak value amplifier (denoted as “1”), the second amplification branch is provided with a second peak value amplifier (denoted as “2”), the third amplification branch is provided with a third peak value amplifier (denoted as “3”), and the fourth amplification branch is provided with a fourth peak value amplifier (denoted as “4”). It should be understood that the connection between the balanced ends of the first coupler and the balanced ends of the third coupler can be as follows: the first balanced end of the first coupler is connected to the input end of the first peak value amplifier, the output end of the first peak value amplifier is connected to the isolated end of the first circulator, and the output end of the first circulator is connected to the first balanced end of the third coupler; and the second balanced end of the first coupler is connected to the input end of the second peak value amplifier, the output end of the second peak value amplifier is connected to the isolated end of the second circulator, and the output end of the second circulator is connected to the second balanced end of the third coupler. The connection between the balanced ends of the second coupler and the balanced ends of the third coupler can be as follows: the first balanced end of the second coupler is connected to the input end of the third peak value amplifier, the output end of the third peak value amplifier is connected to the input end of the first circulator, and the output end of the first circulator is connected to the first balanced end of the third coupler; and the second balanced end of the second coupler is connected to the input end of the fourth peak value amplifier, the output end of the fourth peak value amplifier is connected to the input end of the second circulator, and the output end of the second circulator is connected to the second balanced end of the third coupler.

[0113] It should be noted that the balanced end of the first coupler involved in the above-mentioned power amplifier device 100, power amplifier device 200, power amplifier device 300, power amplifier device 400, power amplifier device 600, power amplifier device 700, and power amplifier device 800 provided by the embodiments of the present application can also be understood as the output end of the first coupler, the balanced end of the second coupler can also be understood as the output end of the second coupler, the balanced end of the fourth coupler can also be understood as the output end of the fourth coupler, and the balanced end in the sixth coupler can also be understood as the output end in the sixth coupler. The balanced end of the third coupler involved in the above-mentioned power amplifier device 100, power amplifier device 200, power amplifier device 300, power amplifier device 400, power amplifier device 600, power amplifier device 700, and power amplifier device 800 provided by the embodiments of the present application can also be understood as the input end of the third coupler, the balanced end of the fifth coupler can also be understood as the input end of the fifth coupler, and the balanced end of the seventh coupler can also be understood as the input end of the seventh coupler.

[0114] The power amplifier device 800 shown in FIG. 8 reduces the number of amplifiers used and simplifies the topology of the power amplifier architecture compared to the power amplifier device 100 to the power amplifier device 700.

[0115] The embodiments of the present application can also replace the third coupler in the above-mentioned power amplifier device with a circulator (denoted as a first circulator), thereby further simplifying the architecture of the power amplifier device. The power amplifier device in which the third coupler in the above-mentioned power amplifier device is replaced by the first circulator can include: a first power amplifier circuit, a second power amplifier circuit, a third power amplifier circuit, and a first circulator.

[0116] Specifically, the input end of the first power amplifier circuit is used to input a first signal, the input end of the second power amplifier circuit is used to input a second signal, and the input end of the third power amplifier circuit is used to input a third signal.

[0117] Specifically, the output end of the first power amplifier circuit is connected to the isolation end of the first circulator, the output end of the second power amplifier circuit and the output end of the third power amplifier circuit are connected to the input end of the first circulator, and the first circulator is used to perform power synthesis on the signals input from the input end of the first circulator and the isolation end of the first circulator and then output.

[0118] FIG. 9 is a schematic diagram of an example of a power amplifier device 900 in which the third coupler in the above-mentioned power amplifier device is replaced by a first circulator. The power amplifier device 900 further includes: a first coupler, a second coupler, and the third power amplifier circuit included in the power amplifier device 900 includes a first amplification branch and a second amplification branch.

[0119] The first coupler and the second coupler included in the power amplifier device 900 are both four-port couplers, the first coupler includes one input end, one isolation end and two balance ends, and the second coupler includes one output end, one isolation end and two balance ends.

[0120] Specifically, the input end of the first coupler is configured to input the third signal, the isolation end of the first coupler is connected to the load, the two balance ends of the first coupler are respectively connected to the input end of the first amplification branch and the input end of the second amplification branch, the output end of the first amplification branch and the output end of the second amplification branch are respectively connected to the two balance ends of the second coupler, the output end of the second power amplifier circuit is connected to the isolation end of the second coupler, and the output end of the third power amplifier circuit is connected to the isolation end of the first circulator.

[0121] As shown in FIG. 9, the first power amplifier circuit is provided with a main amplifier (denoted as "main"), the second power amplifier circuit is provided with a first peak value amplifier (denoted as "1"), the first amplification branch is provided with a second peak value amplifier (denoted as "2"), and the second amplification branch is provided with a third peak value amplifier (denoted as "3"). It should be understood that the output end of the second power amplifier circuit connected to the input end of the first circulator can be specifically as follows: the input end of the first peak value amplifier provided on the second power amplifier circuit is configured to input the second signal, the output end of the first peak value amplifier is connected to the isolation end of the second coupler, and the output end of the second coupler is connected to the input end of the first circulator. The output end of the third power amplifier circuit connected to the input end of the first circulator can be specifically as follows: the input end of the first coupler is configured to input the third signal, the isolation end of the first coupler is connected to the load, the first balance end of the first coupler is connected to the input end of the second peak value amplifier, the output end of the second peak value amplifier is connected to the first balance end of the second coupler, the second balance end of the first coupler is connected to the input end of the third peak value amplifier, the output end of the third peak value amplifier is connected to the second balance end of the second coupler, and the output end of the second coupler is connected to the input end of the first circulator.

[0122] It should be noted that the balance end of the first coupler involved in the above power amplifier device 900 provided by the embodiments of the present application can also be understood as the output end of the first coupler, and the balance end of the second coupler can also be understood as the input end of the second coupler.

[0123] Compared with the power amplifier devices 100 to 800 described above, the power amplifier device 900 shown in FIG. 9 further reduces the number of amplifiers used and simplifies the topology of the power amplifier architecture.

[0124] It can be seen that the third power amplifier circuit of the power amplifier device 900 shown in FIG. 9 comprises an LBMA power amplifier circuit. The sLMBA power amplifier circuit in the power amplifier device 900 can be replaced by an sCLMA power amplifier circuit, and a power amplifier device 1000 shown in FIG. 10 is obtained.

[0125] The power amplifier device 1000 comprises a first power amplifier circuit, a second power amplifier circuit, a third power amplifier circuit, a first circulator, and a second circulator.

[0126] Specifically, the output end of the first power amplifier circuit is connected to the isolation end of the first circulator, the output end of the second power amplifier circuit and the output end of the third power amplifier circuit are connected to the input end of the first circulator, and the first circulator is configured to output the power combination of the signals input from the input end of the first circulator and the isolation end of the first circulator.

[0127] Specifically, the output end of the second power amplifier circuit connected to the input end of the first circulator can be that the output end of the second power amplifier circuit is connected to the isolation end of the second circulator, and the output end of the second circulator is connected to the input end of the first circulator. The output end of the third power amplifier circuit connected to the input end of the first circulator can be that the output end of the third power amplifier circuit is connected to the input end of the second circulator, and the output end of the second circulator is connected to the input end of the first circulator.

[0128] As shown in FIG. 10, a main amplifier is arranged on the first power amplifier circuit, a first peak value amplifier (denoted as “1”) is arranged on the second power amplifier circuit, and a third peak value amplifier (denoted as “3”) is arranged on the third power amplifier circuit. It should be understood that the output end of the second power amplifier circuit connected to the input end of the first circulator can be that the input end of the first peak value amplifier arranged on the second power amplifier circuit is configured to input a second signal, the output end of the first peak value amplifier is connected to the isolation end of the second circulator, and the output end of the second circulator is connected to the input end of the first circulator. The output end of the third power amplifier circuit connected to the input end of the first circulator can be that the input end of the third peak value amplifier arranged on the third power amplifier circuit is configured to input a third signal, the output end of the third peak value amplifier is connected to the input end of the second circulator, and the output end of the second circulator is connected to the input end of the first circulator.

[0129] It can be seen that the peak value amplifiers connected to the input end and the isolation end of the second circulator in the power amplifier device 1000 shown in FIG. 10 can be combined into an sCLMA power amplifier circuit, the sCLMA power amplifier circuit connected to the input end of the first circulator and the main amplifier connected to the isolation end of the first circulator can be combined into a stack-sCLMA power amplifier circuit.

[0130] The power amplifier device 1000 shown in FIG. 10 further reduces the number of amplifiers used and simplifies the topology of the power amplifier architecture compared to the power amplifier devices 100-900 described above.

[0131] The embodiments of the present application can also provide a radio remote unit (RRU), as shown in FIG. 11. The RRU includes any of the power amplifier devices described above and a duplexer, and the power amplifier device is connected to the duplexer.

[0132] The RRU can also include a low noise amplifier (LNA), a transmit signal processing unit, a receive signal processing unit, a common public radio interface (CPRI), and the like.

[0133] The number of power amplifier devices included in the RRU can be multiple, including power amplifier device 1, …, power amplifier device N. Similarly, the number of LNAs included in the RRU can be multiple, including LNA1, …, LNAN.

[0134] The duplexer is connected to a sky-feed system, and the sky-feed system includes multiple antennas.

[0135] Specifically, for a downlink signal, the radio frequency signal of the radio frequency signal processing unit is first amplified in power by the power amplifier device and then sent to the antennas in the sky-feed system through the duplexer. For an uplink signal, the radio frequency signal received by the antennas in the sky-feed system is first sent to the LNA for power amplification through the duplexer and then sent to the receive signal processing unit for processing.

[0136] The embodiments of the present application can also provide a base station, as shown in FIG. 11. The base station includes an RRU and an antenna, and the RRU is connected to the antenna.

[0137] The base station can also include a baseband unit (BBU), and the CPRI in the RRU is connected to the BBU.

[0138] The embodiments of the present application are not limited to the devices including any of the power amplifier devices described above, and any device including any of the power amplifier devices described above is within the protection scope of the embodiments of the present application.

[0139] In several embodiments provided in the present application, it should be understood that the disclosed apparatus can be implemented in other manners. For example, the division of the apparatus embodiments is only a logical function division, and there can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units, or the among the units, can be indirect couplings or communication connections through some interfaces, devices, or units, and can be in electrical, mechanical, or other forms.

[0140] The above descriptions are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, and all these changes and replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power amplifier device, characterized by, Comprise: The first power amplifier circuit, the second power amplifier circuit, the third power amplifier circuit, the first coupler, the second coupler, the third coupler, The input end of the first power amplifier circuit is used for inputting a first signal, the first coupler is arranged on the second power amplifier circuit, the input end of the first coupler is used for inputting a second signal, the isolation end of the first coupler is connected with a load, the second coupler is arranged on the third power amplifier circuit, the input end of the second coupler is used for inputting a third signal, and the isolation end of the second coupler is connected with a load, The output end of the first power amplifier circuit is connected with the isolation end of the third coupler, the balance end of the first coupler is connected with the balance end of the third coupler, the balance end of the second coupler is connected with the balance end of the third coupler, and the third coupler is used for performing power synthesis on signals input from the isolation end of the third coupler and the balance end of the third coupler and then outputting the signals.

2. The power amplifier device of claim 1, wherein, The second power amplifier circuit comprises a first amplification branch and a second amplification branch, and the third power amplifier circuit comprises a third amplification branch and a fourth amplification branch, The balance end of the first coupler is connected with the balance end of the third coupler, comprising that the two balance ends of the first coupler are respectively connected with the input end of the first amplification branch and the input end of the second amplification branch, and the output end of the first amplification branch and the output end of the second amplification branch are connected with the balance end of the third coupler; The balance end of the second coupler is connected with the balance end of the third coupler, comprising that the two balance ends of the second coupler are respectively connected with the input end of the third amplification branch and the input end of the fourth amplification branch, and the output end of the third amplification branch and the output end of the fourth amplification branch are connected with the balance end of the third coupler.

3. The power amplifier device of claim 2, wherein, The third amplification branch comprises a fifth amplification branch and a sixth amplification branch, and the fourth amplification branch comprises a seventh amplification branch and an eighth amplification branch, The balance end of the second coupler is connected with the balance end of the third coupler, comprising that the first balance end of the second coupler is connected with the input end of the fifth amplification branch, the second balance end of the second coupler is connected with the input end of the sixth amplifier, the third balance end of the second coupler is connected with the input end of the seventh amplification branch, the fourth balance end of the second coupler is connected with the input end of the eighth amplifier, and the output end of the fifth amplification branch, the output end of the sixth amplification branch, the output end of the seventh amplification branch and the output end of the eighth amplification branch are all connected with the balance end of the third coupler.

4. The power amplifier device of claim 3, wherein, The first amplification branch is provided with a first peak value amplifier, the second amplification branch is provided with a second peak value amplifier, the fifth amplification branch is provided with a third peak value amplifier, the sixth amplification branch is provided with a fourth peak value amplifier, the seventh amplification branch is provided with a fifth peak value amplifier, and the eighth amplification branch is provided with a sixth peak value amplifier, The first peak amplifier, the third peak amplifier and the fourth peak amplifier are packaged in a three-channel device, the second peak amplifier, the fifth peak amplifier and the sixth peak amplifier are packaged in a three-channel device.

5. The power amplifier device of claim 3, wherein, The first power amplifier circuit is provided with a main amplifier, the first amplification branch is provided with a first peak amplifier, the second amplification branch is provided with a second peak amplifier, the fifth amplification branch is provided with a third peak amplifier, the sixth amplification branch is provided with a fourth peak amplifier, the seventh amplification branch is provided with a fifth peak amplifier, and the eighth amplification branch is provided with a sixth peak amplifier. The main amplifier, the first peak amplifier and the second peak amplifier are packaged in a three-channel device, the third peak amplifier, the fourth peak amplifier, the fifth peak amplifier and the sixth peak amplifier are packaged in a four-channel device.

6. The power amplifier device of claim 2, wherein, The first power amplifier circuit includes a fifth amplification branch and a sixth amplification branch, The first amplification branch is provided with a first peak amplifier, the second amplification branch is provided with a second peak amplifier, the third amplification branch is provided with a third peak amplifier, the fourth amplification branch is provided with a fourth peak amplifier, the fifth amplification branch is provided with a first main amplifier, and the sixth amplification branch is provided with a second main amplifier. The first peak amplifier and the second peak amplifier are packaged in a two-channel device, the third peak amplifier and the fourth peak amplifier are packaged in a two-channel device, and the first main amplifier and the second main amplifier are packaged in a two-channel device.

7. The power amplifier device of claim 6, wherein, The power amplifier device further comprises a first shunt and a second shunt, the third amplification branch comprises a first branch and a second branch, and the fourth amplification branch comprises a third branch and a fourth branch, The balanced end of the second coupler is connected to the balanced end of the third coupler, comprising: The first balanced end of the second coupler is connected to the input end of the third amplification branch, the output end of the third amplification branch is connected to the input end of the first shunt, the two output ends of the first shunt are respectively connected to the input end of the first branch and the input end of the second branch, and the output end of the first branch and the output end of the second branch are connected to the balanced end of the third coupler, The second balanced end of the second coupler is connected to the input end of the fourth amplification branch, the output end of the fourth amplification branch is connected to the input end of the second shunt, the two output ends of the second shunt are respectively connected to the input end of the third branch and the input end of the fourth branch, and the output end of the third branch and the output end of the fourth branch are connected to the balanced end of the third coupler.

8. The power amplifier device of claim 2, wherein, The power amplifier device further comprises a fourth coupler and a fifth coupler, and the third amplification branch comprises a fifth amplification branch and a sixth amplification branch, The balanced end of the second coupler is connected to the balanced end of the third coupler, comprising: The balanced end of the second coupler is connected to the balanced end of the third coupler, comprising: The first balanced end of the second coupler is connected to the input end of the fourth coupler, the isolation end of the fourth coupler is connected to a load, the two balanced ends of the fourth coupler are respectively connected to the input end of the fifth amplification branch and the input end of the sixth amplification branch, the output end of the fifth amplification branch and the output end of the sixth amplification branch are respectively connected to the two balanced ends of the fifth coupler, The output end of the first amplification branch is connected to the isolation end of the fifth coupler, the fifth coupler is used for power combining and outputting signals input from the two balanced ends of the fifth coupler and the isolation end of the fifth coupler, and the output end of the fifth coupler is connected to the balanced end of the third coupler.

9. The power amplifier device of claim 2, wherein, The power amplifier device further comprises a first circulator, The balanced end of the second coupler is connected to the balanced end of the third coupler, and the second balanced end of the second coupler is connected to the input end of the fourth amplification branch, the output end of the fourth amplification branch is connected to the input end of the first circulator, the output end of the second amplification branch is connected to the isolation end of the first circulator, the first circulator is used for power combining and outputting signals input from the input end and the isolation end of the first circulator, and the output end of the first circulator is connected to the balanced end of the third coupler.

10. The power amplifier device according to claim 8 or 9, characterized in that, The power amplifier device further comprises a sixth coupler and a seventh coupler, the fourth amplification branch comprises a seventh amplification branch and an eighth amplification branch, The balanced end of the second coupler is connected to the balanced end of the third coupler, and the second balanced end of the second coupler is connected to the input end of the fourth amplification branch, the output end of the fourth amplification branch is connected to the input end of the first circulator, the output end of the second amplification branch is connected to the isolation end of the first circulator, the first circulator is used for power combining and outputting signals input from the input end and the isolation end of the first circulator, and the output end of the first circulator is connected to the balanced end of the third coupler. The second balanced end of the second coupler is connected to the input end of the sixth coupler, the isolation end of the sixth coupler is connected to a load, the two balanced ends of the sixth coupler are respectively connected to the input end of the seventh amplification branch and the input end of the eighth amplification branch, the output end of the seventh amplification branch and the output end of the eighth amplification branch are respectively connected to the two balanced ends of the seventh coupler, The output end of the second amplification branch is connected to the isolation end of the seventh coupler, the seventh coupler is used for power combining and outputting signals input from the two balanced ends of the seventh coupler and the isolation end of the seventh coupler, and the output end of the seventh coupler is connected to the balanced end of the third coupler.

11. The power amplifier device according to claim 8 or 9, wherein The power amplifier device further comprises a second circulator, The balanced end of the second coupler is connected to the balanced end of the third coupler, and the second balanced end of the second coupler is connected to the input end of the fourth amplification branch, the output end of the fourth amplification branch is connected to the input end of the first circulator, the output end of the second amplification branch is connected to the isolation end of the first circulator, the first circulator is used for power combining and outputting signals input from the input end and the isolation end of the first circulator, and the output end of the first circulator is connected to the balanced end of the third coupler.

12. A power amplifier device, characterized by Comprise: A first power amplifier circuit, a second power amplifier circuit, a third power amplifier circuit, a first circulator, The input end of the first power amplifier circuit is used for inputting a first signal, the input end of the second power amplifier circuit is used for inputting a second signal, the input end of the third power amplifier circuit is used for inputting a third signal, the output end of the first power amplifier circuit is connected with the isolation end of the first circulator, the output end of the second power amplifier circuit is connected with the input end of the first circulator, the output end of the third power amplifier circuit is connected with the input end of the first circulator, and the first circulator is used for outputting the power synthesis of the signals input from the input end of the first circulator and the isolation end of the first circulator.

13. The power amplifier device of claim 12, wherein, The power amplifier device further comprises a first coupler and a second coupler, the first coupler and the second coupler are arranged on the third power amplifier circuit, the third power amplifier circuit comprises a first amplification branch and a second amplification branch, The output end of the third power amplifier circuit is connected with the input end of the first circulator, comprising: The input end of the first coupler is used for inputting the third signal, the isolation end of the first coupler is connected with a load, the two balanced ends of the first coupler are respectively connected with the input end of the first amplification branch and the input end of the second amplification branch, and the output end of the first amplification branch and the output end of the second amplification branch are respectively connected with the two balanced ends of the second coupler, The output end of the second power amplifier circuit is connected with the isolation end of the second coupler, the second coupler is used for outputting the power synthesis of the signals input from the two balanced ends of the second coupler and the isolation end of the second coupler, and the output end of the second coupler is connected with the input end of the first circulator.

14. The power amplifier device of claim 12, wherein, The power amplifier device further comprises a second circulator, The output end of the third power amplifier circuit is connected with the input end of the first circulator, comprising: The output end of the third power amplifier circuit is connected with the input end of the second circulator, the output end of the second power amplifier circuit is connected with the isolation end of the second circulator, the second circulator is used for outputting the power synthesis of the signals input from the input end of the second circulator and the isolation end of the second circulator, and the output end of the second circulator is connected with the input end of the first circulator.

15. A radio remote unit, characterized by: The power amplifier device and the duplexer as claimed in any one of claims 1 to 14 are comprised, and the power amplifier device is connected with the duplexer.

16. A base station, characterized by The radio frequency remote unit as claimed in claim 15 and the antenna are comprised, the radio frequency remote unit is connected with the antenna, and the radio frequency remote unit is used for processing the signals received or transmitted by the antenna.

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