Power amplification system, radio frequency emission system and signal emission device

Abstract

The embodiment of the invention provides a power amplification system, a radio frequency emission system and a signal emission device. The power amplification system comprises a hybrid coupler, a first amplifier, a second amplifier, a first impedance conversion line and a second impedance conversion line. The output end of the first amplifier is coupled with the hybrid coupler through a first impedance conversion line. And the output end of the second amplifier is coupled with the hybrid coupler through a second impedance conversion line. Wherein the first amplifier and the second amplifier are used for outputting radio frequency signals. And the hybrid coupler is used for performing impedance conversion with the first impedance conversion line and / or the second impedance conversion line. And outputting the synthesized radio frequency signal from the fourth end of the hybrid coupler. The synthesized radio frequency signal is synthesized by a plurality of radio frequency signals. According to the embodiment of the invention, the hybrid coupler is combined with the wavelength line serving as the impedance conversion line to realize impedance conversion and load traction, so that the area overhead caused by the wavelength line is reduced on the basis of reducing the power consumption of the power amplification system.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a power amplification system, a radio frequency transmission system and a signal transmission device. Background Art

[0002] In the application of wireless communication technology, data information is carried on the radio frequency signal through modulation technology, and the radio frequency signal is transmitted to realize wireless communication between the transmitting side and the receiving side. In order to ensure the communication quality of wireless communication, the radio frequency signal is usually required to be power amplified before the radio frequency signal is transmitted. Power amplification of the radio frequency signal depends on the power amplifier. A constant supply power signal is input to the power supply end of the power amplifier. When the input end of the power amplifier receives the corresponding radio frequency signal, the power amplifier converts and outputs a second radio frequency signal based on the supply power signal according to the signal power of the input first radio frequency signal. The signal power of the second radio frequency signal is in a gain amplification relationship with the signal power of the first radio frequency signal. The second radio frequency signal is transmitted as a radio frequency signal after power amplification. However, with the development of wireless communication technology, the modulation technology of radio frequency signals has gradually become more complicated. At this time, in order to ensure the linearity of the second radio frequency signal, it is necessary to make the power amplifier have a certain power back-off amount. As the power back-off amount increases, the conversion efficiency of the supply power signal decreases, which increases the static power consumption of the power amplifier, resulting in a huge waste of power consumption.

[0003] An improved method is: a power amplifier system based on a Doherty structure realizes power amplification. The power amplifier system includes multiple impedance transformation lines and at least two power amplifiers. Among the at least two power amplifiers, one main power amplifier and one or more slave power amplifiers are included. According to the signal power of the input first RF signal, power amplification is realized by one or more power amplifiers. When the multi-channel power amplifier is working, the main power amplifier and the slave power amplifier realize load pulling through multiple impedance transformation lines to synthesize the power of multiple RF signals output by the multi-channel power amplifier to obtain a second RF signal. The power amplifier system based on the Doherty structure can still have a high conversion efficiency and power back-off when amplifying the first RF signal whose signal power is in a lower power working range. At the same time, the power amplifier system can maintain a low static power consumption. However, a large number of wavelength lines are required in the Doherty architecture to perform impedance transformation to synthesize RF signals, which makes the area of ​​the power amplifier system larger, and as the number of branches of the power amplifier increases, the number of wavelength lines will also increase, so that the area overhead will also increase. Summary of the invention

[0004] The embodiments of the present application provide a power amplification system, a radio frequency transmission system and a signal transmission device, which reduce the number of required wavelength lines on the basis of realizing power synthesis of multiple branches.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a power amplification system is provided, which includes a hybrid coupler, a first amplifier, a second amplifier, a first impedance transformation line, and a second impedance transformation line. The output end of the first amplifier is coupled to the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the hybrid coupler through the second impedance transformation line. The first amplifier and the second amplifier are used to output radio frequency signals. The hybrid coupler is used to: perform impedance transformation with the first impedance transformation line and / or the second impedance transformation line. A synthesized radio frequency signal is output from a fourth end of the hybrid coupler. The synthesized radio frequency signal is synthesized by multiple radio frequency signals.

[0007] In the traditional Doherty architecture, in the two-branch Doherty architecture, at least four wavelength lines as impedance transformation lines are required to achieve impedance transformation and load pulling, so as to achieve the purpose of power synthesis. As the number of branches increases, the number of wavelength lines will also increase, which greatly increases the area overhead, limiting the application and development of power amplifier systems including multi-branch structures. In the embodiment of the present application, by coupling the hybrid coupler with the first amplifier and the second amplifier, impedance transformation and load pulling can be achieved on the basis of reducing the number of wavelength lines as impedance transformation lines, thereby achieving the purpose of power synthesis. Based on power synthesis, the power amplifier system can have higher fallback conversion efficiency and full load conversion efficiency, as well as lower static power consumption. At the same time, as the number of branches of the power amplifier system increases, in one or more groups of two-branch structures in the multi-branch, impedance transformation and load pulling can be achieved by one or more hybrid couplers to reduce a larger number of wavelength lines.

[0008] Exemplarily, different numbers of wavelength lines may be reduced depending on how the hybrid coupler is configured.

[0009] Exemplarily, according to different types of amplifiers, the multiple amplifiers can be divided into a master amplifier and at least one slave amplifier. The minimum operating power of the master amplifier is less than the minimum operating power of all other slave amplifiers. The multiple slave amplifiers have different minimum operating powers.

[0010] In a possible implementation, the fourth end of the hybrid coupler is an output end, and the first end, the second end, and the third end of the hybrid coupler are respectively coupled with amplifying branches to achieve impedance transformation and load pulling under a multi-branch architecture.

[0011] Exemplarily, the power amplification system also includes a third amplifier. The output end of the first amplifier is coupled to the first end of the hybrid coupler through a first impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through a second impedance transformation line. The output end of the third amplifier is coupled to the third end of the hybrid coupler. In a traditional three-way Doherty architecture, at least six wavelength lines as impedance transformation lines are required to achieve impedance transformation and load pulling, thereby achieving the purpose of power synthesis. In an embodiment of the present application, in a power amplification system with a three-way branch structure, a hybrid coupler can be used to reduce the wavelength lines in the three branches to reduce the area overhead caused by the wavelength lines in the power amplification system. Compared with the traditional three-way Doherty architecture, in an embodiment of the present application, according to the types of amplifiers in the three branches and the coupling relationship between them and the hybrid coupler, one or two wavelength lines can be reduced based on a hybrid coupler.

[0012] In some possible implementations, the third terminal of the hybrid coupler is grounded. The fourth terminal of the hybrid coupler is an output terminal. The first terminal and / or the second terminal of the hybrid coupler is coupled to a branch. At this time, the minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier.

[0013] Exemplarily, when the third end of the hybrid coupler is grounded. The power amplification system also includes a third amplifier. The output end of the first amplifier is coupled to the first end of the hybrid coupler through a first impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through a second impedance transformation line. The output end of the third amplifier is coupled to the fourth end of the hybrid coupler. The minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier. In an embodiment of the present application, when the third end of the hybrid coupler is grounded, the first amplifier as the first master amplifier can be coupled through the first end of the hybrid coupler. The second amplifier as the first slave amplifier is coupled through the second end of the hybrid coupler. The third amplifier as the second slave amplifier is coupled through the fourth end of the hybrid coupler, and the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0014] Exemplarily, when the third end of the hybrid coupler is grounded. The power amplification system also includes a third amplifier and a third impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the third impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier. In an embodiment of the present application, when the third end of the hybrid coupler is grounded, the first amplifier as the first slave amplifier can be coupled through the first end of the hybrid coupler. The second amplifier as the second slave amplifier is coupled through the second end of the hybrid coupler. The third amplifier as the first master amplifier is coupled through the fourth end of the hybrid coupler, and the use of a hybrid coupler can reduce the number of required wavelength lines on the basis of reducing power consumption based on impedance transformation and load pulling.

[0015] Exemplarily, when the third end of the hybrid coupler is grounded. The power amplification system also includes a third amplifier, a third impedance transformation line, and a fourth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the fourth impedance transformation line connected in series. The output end of the third amplifier is coupled to the second end of the hybrid coupler through the third impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier. In an embodiment of the present application, the third amplifier is the first master amplifier. The first amplifier is the first slave amplifier. The second amplifier is the second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0016] Exemplarily, when the third end of the hybrid coupler is grounded. The power amplification system also includes a third amplifier. The output end of the first amplifier is coupled to the first end of the hybrid coupler through a first impedance transformation line. The output end of the third amplifier is coupled to the first end of the hybrid coupler. The output end of the second amplifier is coupled to the second end of the hybrid coupler through a second impedance transformation line. The minimum operating power of the third amplifier is greater than the minimum operating power of the first amplifier and less than the minimum operating power of the second amplifier. In an embodiment of the present application, the first amplifier is a first master amplifier. The third amplifier is a first slave amplifier. The second amplifier is a second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0017] Exemplarily, when the third end of the hybrid coupler is grounded. The power amplification system also includes a third amplifier and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line and the third impedance transformation line connected in series. The output end of the third amplifier is coupled to the first end of the third impedance transformation line, and is coupled to the first end of the hybrid coupler through the second end of the third impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line. The minimum operating power of the third amplifier is greater than the minimum operating power of the first amplifier and less than the minimum operating power of the second amplifier. In an embodiment of the present application, the first amplifier is a first master amplifier. The third amplifier is a first slave amplifier. The second amplifier is a second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0018] In some possible implementations, the third end of the hybrid coupler can be left vacant. The fourth end of the hybrid coupler is used as an output end. Impedance transformation and load pulling are achieved through at least two of the first end, the second end, and the fourth end of the hybrid coupler. At this time, the minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier.

[0019] Exemplarily, when the third end of the hybrid coupler is vacant. The power amplification system also includes a third amplifier and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line. The first end of the third impedance transformation line is coupled to the fourth end of the hybrid coupler. The output end of the third amplifier is coupled to the second end of the third impedance transformation line. The minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier. In an embodiment of the present application, the first amplifier is a first master amplifier. The second amplifier is a first slave amplifier. The third amplifier is a second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0020] Exemplarily, when the third end of the hybrid coupler is vacant. The power amplification system also includes a third amplifier and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line and the third impedance transformation line connected in series. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line. The output end of the third amplifier is coupled to the first end of the third impedance transformation line, and is coupled to the first end of the hybrid coupler through the second end of the third impedance transformation line. The minimum operating power of the third amplifier is greater than the minimum operating power of the first amplifier and less than the minimum operating power of the second amplifier. In an embodiment of the present application, the first amplifier is a first master amplifier. The third amplifier is a first slave amplifier. The second amplifier is a second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0021] Exemplarily, when the third end of the hybrid coupler is vacant. The power amplification system also includes a third amplifier, a third impedance transformation line and a fourth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line. The first end of the fourth impedance transformation line is coupled to the fourth end of the hybrid coupler. The output end of the third amplifier is coupled to the second end of the fourth impedance transformation line through the third impedance transformation line. The minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier. In an embodiment of the present application, the third amplifier is the first master amplifier. The first amplifier is the first slave amplifier. The second amplifier is the second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0022] Exemplarily, when the third end of the hybrid coupler is vacant. The power amplification system also includes a third amplifier and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series. The output end of the third amplifier is coupled to the second end of the hybrid coupler. The minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier. In an embodiment of the present application, the first amplifier is a first master amplifier. The second amplifier is a first slave amplifier. The third amplifier is a second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0023] Exemplarily, when the third end of the hybrid coupler is vacant. The power amplification system also includes a third amplifier and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series. The output end of the third amplifier is coupled to the fourth end of the hybrid coupler. The minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier. In an embodiment of the present application, the first amplifier is a first master amplifier. The second amplifier is a first slave amplifier. The third amplifier is a second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0024] Exemplarily, when the third end of the hybrid coupler is vacant. The power amplification system also includes a third amplifier, a third impedance transformation line and a fourth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series. The output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the fourth impedance transformation line. The minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier. In an embodiment of the present application, the third amplifier is the first master amplifier. The first amplifier is the first slave amplifier. The second amplifier is the second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0025] Exemplarily, when the third end of the hybrid coupler is vacant. The power amplification system also includes a third amplifier, a third impedance transformation line and a fourth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series. The output end of the third amplifier is coupled to the second end of the hybrid coupler through the fourth impedance transformation line. The minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier. In an embodiment of the present application, the third amplifier is the first master amplifier. The first amplifier is the first slave amplifier. The second amplifier is the second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0026] In some possible implementations, the second and third ends of the hybrid coupler may be grounded, or the second and third ends of the hybrid coupler may be left vacant. The fourth end of the hybrid coupler is used as an output end. At this time, the power amplification system also includes a third impedance transformation line. The minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series. In an embodiment of the present application, the second and third ends of the hybrid coupler may be grounded, or the second and third ends of the hybrid coupler may be left vacant. Two amplification branches are coupled based on the first end of the hybrid coupler to reduce the number of wavelength lines in the architecture of the two branches.

[0027] Exemplarily, when the second end and the third end of the hybrid coupler are grounded, or the second end and the third end of the hybrid coupler are vacant. The hybrid coupler can also be used to reduce the wavelength lines in the three-branch architecture. At this time, the power amplification system also includes a third amplifier. The fourth end of the hybrid coupler is coupled to the output end of the third amplifier. The minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier. In an embodiment of the present application, the first amplifier is a first master amplifier. The second amplifier is a first slave amplifier. The third amplifier is a second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0028] Exemplarily, when the second end and the third end of the hybrid coupler are grounded, or the second end and the third end of the hybrid coupler are vacant. The hybrid coupler can also be used to reduce the wavelength lines in the three-branch architecture. At this time, the power amplification system also includes a third amplifier and a fourth impedance transformation line. The output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the fourth impedance transformation line. The minimum power of the third amplifier is less than the minimum operating power of the first amplifier. In an embodiment of the present application, the third amplifier is the first master amplifier. The first amplifier is the first slave amplifier. The second amplifier is the second slave amplifier. Through the coupling method of the embodiment of the present application, the number of required wavelength lines can be reduced by using a hybrid coupler on the basis of reducing power consumption based on impedance transformation and load pulling.

[0029] In some possible implementations, the hybrid coupler is a coupler based on a three-dimensional stacked structure. Exemplarily, the hybrid coupler may be a coupler based on a waveguide suspension line process, or a suspension coupler based on a substrate integrated suspended line (SISL) process. In an embodiment of the present application, a coupler with a three-dimensional stacked structure is used as a hybrid coupler coupler1. Compared to a traditional coupler, a coupler with a three-dimensional stacked structure forms a coupler through a multi-layer stacked structure, which can reduce the occupied area of ​​the coupler.

[0030] For example, when the frequency band of the input RF signal is 860 MHz, the length of one wavelength line is about 52 mm. When the hybrid coupler is a suspended coupler, the length of one hybrid coupler is about 6 mm. Therefore, the embodiment of the present application can greatly reduce the area overhead caused by the wavelength line in the power amplifier system.

[0031] In a second aspect, an embodiment of the present application further provides a radio frequency transmission system, the radio frequency transmission system comprising a radio frequency generation circuit and a power amplification system as described in the first aspect. The output end of the radio frequency generation circuit is coupled to the input end of the power amplification system.

[0032] In a third aspect, an embodiment of the present application further provides a signal transmitting device, which includes a baseband processing system and a radio frequency transmitting system as described in the second aspect.

[0033] Regarding the technical principles and beneficial effects of the second and third aspects, reference may be made to the relevant description of the first aspect above, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the structure of a power amplifier;

[0035] Figure 2 A schematic diagram of the response relationship between the gain amplification factor and the input power of a power amplifier;

[0036] Figure 3 A schematic diagram of the structure of a signal transmitting device provided in an embodiment of the present application;

[0037] Figure 4 A schematic diagram of the structure of a radio frequency transmission system provided in an embodiment of the present application;

[0038] Figure 5 A schematic diagram of a first power amplification system provided in an embodiment of the present application Figure 1 ;

[0039] Figure 6A schematic diagram of another first power amplification system provided in an embodiment of the present application Figure 2 ;

[0040] Figure 7 A method provided in the embodiment of the present application is as follows Figure 6 A schematic diagram showing the response relationship between each branch current and input signal power of the first power amplification system shown;

[0041] Figure 8 A method provided in the embodiment of the present application is as follows Figure 6 A schematic diagram showing the response relationship between the voltages of each branch of the first power amplification system and the input signal power;

[0042] Fig. 9 A method provided in the embodiment of the present application is as follows Figure 6 A schematic diagram showing the response relationship between each branch impedance load and input signal power of the first power amplification system;

[0043] Fig.10 A method provided in the embodiment of the present application is as follows Figure 6 A schematic diagram showing the response relationship between the conversion efficiency and the input signal power of the first power amplification system shown;

[0044] Fig.11 A schematic diagram of the structure of another first power amplification system provided in an embodiment of the present application Figure 3 ;

[0045] Fig.12 A method provided in the embodiment of the present application is as follows Fig.11 A schematic diagram showing the response relationship between each branch current and input signal power of the first power amplification system shown;

[0046] Fig.13 A method provided in the embodiment of the present application is as follows Fig.11 A schematic diagram showing the response relationship between the voltages of each branch of the first power amplification system and the input signal power;

[0047] Fig.14 A method provided in the embodiment of the present application is as follows Fig.11 A schematic diagram showing the response relationship between each branch impedance load and input signal power of the first power amplification system;

[0048] Fig.15 A method provided in the embodiment of the present application is as follows Fig.11 A schematic diagram showing the response relationship between the conversion efficiency and the input signal power of the first power amplification system shown;

[0049] Fig.16 A structural diagram of the correspondence between the ports of a hybrid coupler provided in an embodiment of the present application;

[0050] Fig.17 A schematic diagram of a second power amplification system provided in an embodiment of the present application Figure 1 ;

[0051] Fig.18 A schematic diagram of another structure of a second power amplification system provided in an embodiment of the present application Figure 2 ;

[0052] Fig.19 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 3 ;

[0053] Fig. 20 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 4 ;

[0054] Fig.21 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 5 ;

[0055] Fig. 22 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 6 ;

[0056] Fig.23 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 7 ;

[0057] Fig.24 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 8 ;

[0058] Fig.25 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 9 ;

[0059] Fig.26 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10 ;

[0060] Fig. 27 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10 one;

[0061] Fig.28 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10 two;

[0062] Fig.29 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10three;

[0063] Fig.30 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10 Four;

[0064] Fig.31 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10 five;

[0065] Fig.32 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10 six;

[0066] Fig.33 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10 seven;

[0067] Fig.34 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10 eight;

[0068] Fig.35 A method provided in the embodiment of the present application is as follows Fig.34 A schematic diagram showing the response relationship between each branch current and input signal power of the second power amplification system shown;

[0069] Fig.36 A method provided in the embodiment of the present application is as follows Fig.34 A schematic diagram showing the response relationship between the branch voltages and the input signal power of the second power amplification system shown;

[0070] Fig.37 A method provided in the embodiment of the present application is as follows Fig.34 A schematic diagram showing the response relationship between the impedance load of each branch of the second power amplification system and the input signal power;

[0071] Fig.38 A method provided in the embodiment of the present application is as follows Fig.34 A schematic diagram showing the response relationship between the conversion efficiency of the second power amplification system and the input signal power;

[0072] Fig.39 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 10 Nine;

[0073] Fig.40 A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 2 ten;

[0074] Fig.41A schematic diagram of the structure of another second power amplification system provided in an embodiment of the present application Figure 2 eleven;

[0075] Fig.42 A method provided in the embodiment of the present application is as follows Fig.39 , Fig.40 and Fig.41 A schematic diagram showing the response relationship between each branch current and input signal power of the second power amplification system shown;

[0076] Fig.43 A method provided in the embodiment of the present application is as follows Fig.39 , Fig.40 and Fig.41 A schematic diagram showing the response relationship between the branch voltages and the input signal power of the second power amplification system shown;

[0077] Fig.44 A method provided in the embodiment of the present application is as follows Fig.39 , Fig.40 and Fig.41 A schematic diagram showing the response relationship between the impedance load of each branch of the second power amplification system and the input signal power;

[0078] Fig.45 A method provided in the embodiment of the present application is as follows Fig.39 , Fig.40 and Fig.41 The diagram shows the response relationship between the conversion efficiency of the second power amplification system and the input signal power. DETAILED DESCRIPTION

[0079] It should be noted that the terms "first", "second", etc. involved in the embodiments of the present application are only used to distinguish features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

[0080] The terms "exemplary" or "for example" and the like in the embodiments of the present application are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the related concepts in a specific way.

[0081] The terms "coupling" and "connection" involved in the embodiments of the present application should be understood in a broad sense. For example, they may refer to a direct physical connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors, microstrip lines, couplers or other electronic devices.

[0082] First, some basic concepts involved in this application are explained:

[0083] Power amplifier: Power amplifiers can be divided into power tube type power amplifiers and switch type power amplifiers. Power tube type power amplifiers can be further divided into Class A power amplifiers, Class B power amplifiers, Class AB power amplifiers and Class C power amplifiers. Among them, Class A power amplifiers, Class B power amplifiers and Class AB power amplifiers are linear power amplifiers. Class C power amplifiers are nonlinear power amplifiers. Class A power amplifiers can achieve full-cycle operation and have the best linearity, which is suitable for power amplification of small-signal DC signals. Class B power amplifiers operate in half a cycle, and single-ended Class B power amplifiers will produce a lot of nonlinear distortion. Class AB power amplifiers are a combination of Class A power amplifiers and Class B power amplifiers. The efficiency and linearity of Class AB power amplifiers are between Class A power amplifiers and Class B power amplifiers, and they are widely used in power amplification of RF signals. Class C power amplifiers are nonlinear power amplifiers. Such as Figure 1 As shown in FIG. 1 , a basic structure of a single power tube type power amplifier is shown. In the figure, a gate bias circuit P1 is provided at the gate of the power tube M, and a drain bias circuit P2 is provided at the drain of the power tube M. The bias state between the electrodes of the power tube M is controlled by the gate bias circuit P1 and the drain bias circuit P2, so that the power tube M is in a power amplification state. The power tube M in the power amplification state can amplify the power of the received signal.

[0084] The efficiency of a power amplifier refers to the ratio of the input power that can be converted into useful output power. In practical applications, the ratio of the power of the signal output by the power amplifier to the power supplied by the power supply is the efficiency of the power amplifier, expressed as η, that is: η = Po / PE*100%. According to the definition, the efficiency of the power amplifier = (output power / supply power) × 100%. Figure 1 For example, the working efficiency of the power amplifier can be reflected by the working efficiency provided by the drain bias circuit P2 of the power tube M, that is, the ratio of the drain DC signal provided by the drain bias circuit P2 to the RF signal actually output by the power amplifier. The working efficiency of the power amplifier will decrease as the output power decreases. The output power of the power amplifier is positively correlated with the input power of the power amplifier. The input power of the power amplifier is as follows: Figure 1 The power of the radio frequency signal received by the gate of the power tube M shown.

[0085] Power amplifier power back-off: such as Figure 2As shown, it is a schematic diagram of power amplification of a single power amplifier. It can be seen that the power amplifier has a certain linear working power range. In this linear working power range, the amplification gain multiple between the input power and the output power of the power amplifier is linear (that is, it is a proportional constant amplification gain multiple). When the input power of the power amplifier exceeds the linear working power range, the amplification gain multiple of the input power and the output power is nonlinear. Even when the input power reaches the saturation power range of the power amplifier, the output power no longer increases with the increase of the input power. In order to ensure that the RF signal output by the power amplifier is linearly amplified, it is necessary to perform power backoff on the power amplifier (that is, back off a certain amount from the maximum working power point of the power amplification). The RF signal received by the power amplifier is a modulated signal obtained by modulating data information onto a carrier signal. The backoff amount of power backoff is related to the peak to average power ratio (PAPR) of the modulated signal. In wireless communication, the data signal that needs to be communicated is carried based on the RF signal. The greater the amount of data carried on the RF signal, the greater the power of the RF signal received by the power tube M.

[0086] Static current refers to the current on an electronic device when there is no external signal input, that is, the current consumed by the electronic device when it is not affected by external factors. Similarly, static voltage refers to the voltage on an electronic device when there is no external signal input, that is, the voltage maintained by the electronic device when it is not affected by external factors. Static power consumption refers to the power consumption generated by an electronic device under the state of static current and / or static voltage.

[0087] The present application embodiment provides a signal transmitting device, such as Figure 3 As shown, the signal transmitting device 1000 includes a baseband processing system 100 and a radio frequency transmitting system 200. The output end of the baseband processing system 100 is coupled to the input end of the radio frequency transmitting system 200. The baseband processing system 100 is used to: send data information to the radio frequency transmitting system 200 in the form of a first baseband signal. The radio frequency transmitting system 200 is used to: carry the first baseband signal on a radio frequency signal based on a modulation technology, and transmit the radio frequency signal to achieve wireless communication.

[0088] like Figure 4 As shown, the RF transmission system 200 includes a RF generation circuit 10 and a power amplification system 20. The output end of the RF generation circuit 10 is coupled to the input end of the power amplification system 20. The RF generation circuit 10 is used to: carry the first baseband signal on the first RF signal based on the modulation technology, and output the first RF signal to the power amplification system 20.

[0089] Exemplarily, the power amplification system 20 may include one or more input terminals. In some examples, the RF generation circuit 10 may output one or more first RF signals to an input terminal of the power amplification system 20. In some examples, the RF generation circuit 10 may output one or more first RF signals to multiple input terminals of the power amplification system 20. In some examples, the multiple first RF signals may be the same RF signal or different RF signals.

[0090] In some possible implementations, such as Figure 4 The power amplification system 20 shown is a first power amplification system based on a Doherty architecture. The first power amplification system includes a multi-channel power amplifier. One of the multi-channel power amplifiers is a main power amplifier (MPA), also known as a carrier power amplifier (CPA). The main power amplifier can be a class AB power amplifier. The other one or more power amplifiers in the multi-channel power amplifier are auxiliary power amplifiers (APA), also known as peak power amplifiers (PPA); the slave power amplifier can be a class B power amplifier or a class C power amplifier. Exemplarily, the first power amplification system can be based on a traditional two-channel Doherty architecture and a multi-channel Doherty architecture, etc.

[0091] In some examples, such as Figure 5As shown in Figure (a), the first power amplification system 20A is a traditional Doherty architecture including a main amplifier M1 and a first slave amplifier A1. At this time, the first power amplification system 20A also includes a first wavelength line L1 and a second wavelength line L2. Among them, the output end of the first main amplifier M1 is coupled to the first end of the first wavelength line L1, and is coupled to the first end of the second wavelength line L2 through the second end of the first wavelength line L1. The output end of the first slave amplifier A1 is coupled to the second end of the first wavelength line L1. In the embodiment of the present application, the minimum operating power of the first slave amplifier A1 is greater than the minimum operating power of the first main amplifier M1. When the operating power of the first power amplification system 20A is in the low-power operating range, the first slave amplifier A1 does not work, and the first main amplifier M1 starts to work. When the power of the input RF signal is low, the first main amplifier M1 can work in its own larger power operating range to achieve a higher back-off conversion efficiency. When the power of the input RF signal is large, the first power amplification system 20A works in the high-power operating range, and both the first main amplifier M1 and the first slave amplifier A1 work. At this time, the first main amplifier M1 and the first slave amplifier A1 respectively power amplify the input RF signal and output two power-amplified RF signals. When the first power amplification system 20A works in the high-power working range, the first wavelength line L1 can perform impedance inversion. The impedance inversion of the first wavelength line L1 enables: when the first slave amplifier A1 is turned on, the power of the branch where the first main amplifier M1 is located can continue to increase. Based on the changes in the working voltage, working current and load size of the branch where the first main amplifier M1 and the first slave amplifier A1 are located when the impedance of the first wavelength line L1 is inverted, combined with the output impedance matching of the second wavelength line L2, the first power amplification system 20A can achieve load pulling (loud pull) to achieve power synthesis of the RF signals output by the first main amplifier M1 and the first slave amplifier A1 to obtain a second RF signal. When the first main amplifier M1 and the first slave amplifier A1 of the first power amplification system 20A work simultaneously, the first power amplification system 20A can also maintain a large full-load conversion efficiency. In addition, when the first power amplification system 20A is in an idle state, the first main amplifier M1 can be biased at a lower static operating voltage and / or static operating current, and its static power consumption is also lower. Figure 5 The Doherty architecture shown in Figure (a) is only a theoretical architecture based on load pulling and impedance transformation. In actual applications, the structure also includes many wavelength lines that do not perform impedance inversion. These wavelength lines are connected in series in pairs. The two wavelength lines in series as impedance transformation lines can compensate for each other's impedance inversion effect. Figure 5The theoretical schematic diagram of Figure (a) is not shown. However, in practical applications, these wavelength lines as impedance transformation lines are still needed to achieve power synthesis of multiple RF signals. For example, Figure 5 As shown in Figure (b), based on Figure 5 The first power amplification system 20A shown in FIG. (a) also includes a third wavelength line L3 and a fourth wavelength line L4. After the output end of the first slave amplifier A1 is coupled with the third wavelength line L3 and the fourth wavelength line L4, it is coupled to the second end of the first wavelength line L1 through the fourth wavelength line L4. Figure 5 As shown in Figure (b), the traditional Doherty architecture requires at least four impedance transformation lines (for example, the first wavelength line L1, the second wavelength line L2, the third wavelength line L3 and the fourth wavelength line L4) to achieve power synthesis. In actual products, the area overhead of the power tube M used in the power amplifier is relatively small. The wavelength line used as an impedance transformation line is usually 1 / 4 wavelength of the radio frequency signal, which has a certain length and area. A large number of wavelength lines will increase the area of ​​the first power amplifier system 20A. Taking the frequency band less than 1 GHz as an example, the length of the wavelength line corresponding to the radio frequency signal of 860 MHz is approximately 52 millimeters (mm). Therefore, the main area overhead of the first power amplifier system 20A comes from the wavelength line, and this area occupancy will greatly increase with the increase in the number of branches in the Doherty architecture. The following takes a multi-channel Doherty architecture as an example:

[0092] In some examples, the first power amplification system 20A can also be a multi-channel Doherty architecture including a multi-channel amplifier. Taking the multi-channel Doherty architecture as an example, the first main amplifier, the first slave amplifier, and the second slave amplifier are three amplifiers whose minimum operating power is sorted from small to large. When the first power amplification system 20A is in a low-power operating range, the first main amplifier is turned on and the two slave amplifiers are not working. When the first power amplification system 20A is in a medium-power operating range, the first main amplifier and the first slave amplifier are turned on and the second slave amplifier is not working. When the first power amplification system 20A is in a high-power operating range, the first main amplifier, the first slave amplifier, and the second slave amplifier are all turned on.

[0093] Exemplarily, when the first power amplification system 20A is based on a Doherty architecture including three branches, as shown in FIG. Figure 6As shown in Figure (a), the first power amplification system 20A includes a first master amplifier M1, a first slave amplifier A1, a second slave amplifier A2, a first wavelength line L1, a second wavelength line L2 and a seventh wavelength line L7. The output end of the first master amplifier M1 is coupled to the first end of the first wavelength line L1, and the second end of the first wavelength line L1 is coupled to the first end of the second wavelength line L2. The second end of the second wavelength line L2 is coupled to the first end of the seventh wavelength line L7. The output end of the first slave amplifier A1 is coupled to the second end of the first wavelength line L1, and the output end of the second slave amplifier A2 is coupled to the second end of the second wavelength line L2. The second end of the seventh wavelength line L7 is used to output the second RF signal after power synthesis. As shown in Figure 2, the output end of the first slave amplifier A1 is coupled to the second end of the first wavelength line L1, and the output end of the second slave amplifier A2 is coupled to the second end of the second wavelength line L2. The second end of the seventh wavelength line L7 is used to output the second RF signal after power synthesis. Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, Figure 6 FIG. 1 is a schematic diagram of a circuit parameter and a power variation curve of an input radio frequency signal of a first power amplification system 20A as shown in FIG. 1 . Figure 7 Schematic diagram of the current change curve of each branch and the power change curve of the input RF signal. Figure 8 Schematic diagram of the voltage of each branch and the power variation curve of the input RF signal. Fig. 9 It is a schematic diagram of the load impedance of each branch and the power change curve of the input RF signal. Fig.10 Schematic diagram of the conversion efficiency and power change curve of the input RF signal of the first power amplification system 20A. In the figure, line ① is the branch where the first master amplifier M1 is located. Line ② is the branch where the first slave amplifier A1 is located, and line ③ is the branch where the second slave amplifier A2 is located. Take 0dB as the maximum operating power point of the first power amplification system 20A as an example:

[0094] When the signal power of the input RF signal is below -11dB, Figure 6 The first power amplification system 20A shown in FIG. (a) is in a low power working range. At this time, the first master amplifier M1 is working, and the first slave amplifier A1 and the second slave amplifier A2 are not working. In the low power working range, as the signal power of the input RF signal increases, Figure 7 As shown, the current in the branch where the first master amplifier M1 is located gradually increases, and the current in the branch where the first slave amplifier A1 and the second slave amplifier A2 are located remains at 0. Figure 8 As shown, the voltages of the branches where the first master amplifier M1, the first slave amplifier A1, and the second slave amplifier A2 are located all gradually increase. Fig. 9 As shown, the impedance of the branch where the first main amplifier M1 is located remains constant, and the impedance of the branch where the first slave amplifier A1 and the second slave amplifier A2 are located remains infinite. At this time, the RF signal output by the first main power amplifier M1 is used as the second RF signal. Fig.10As shown, at the saturation power point of -11 dB in the low power working range, the first power amplification system 20A can maintain a relatively high back-off conversion efficiency.

[0095] When the signal power of the input RF signal is between -11dB and -5dB, Figure 6 The first power amplification system 20A shown in FIG. (a) is in the medium power working range. At this time, the first master amplifier M1 and the first slave amplifier A1 are working and the second slave amplifier A2 is not working. Figure 7 As shown, the current of the branch where the first master amplifier M1 is located gradually increases until it reaches the maximum current. The current of the branch where the first slave amplifier A1 is located gradually increases. The current of the branch where the second slave amplifier A2 is located remains at 0. Figure 8 As shown, the voltage of the branch where the first main amplifier M1 is located remains unchanged at the maximum voltage value, and the voltage of the first slave amplifier A1 gradually increases to the maximum voltage value. The voltage of the second slave amplifier A2 gradually rises. After the first slave amplifier A1 is turned on, as the signal power of the input RF signal increases, impedance inversion can be achieved based on the first wavelength line L1, thereby ensuring that the signal power of the RF signal output by the first main amplifier M1 can still increase in the medium power working range: Fig. 9 As shown in FIG. 1 , at this time, the load impedance of the branch where the second slave amplifier A2 is located remains infinite, while the load impedance of the branch where the first slave amplifier A1 is located gradually decreases. The impedance inversion of the first wavelength line L1 causes the load impedance of the branch where the first master amplifier M1 is located to decrease. At this time, as shown in FIG. Figure 7 He Ru Figure 8 As shown, although the voltage of the branch where the first main amplifier M1 is located remains unchanged, the load impedance of the branch where the first main amplifier M1 is located is reduced so that its current gradually increases, so that the signal power of the RF signal output by the first main amplifier M1 can still increase with the signal power of the input RF signal. Under the effect of load traction between the first main amplifier M1 and the first slave amplifier A1, the RF signal power output by the first main amplifier M1 and the first slave amplifier A1 can be synthesized to obtain a second RF signal. The second wavelength line L2 and the seventh wavelength line L7 can perform output impedance matching during the process of inputting the second RF signal. As shown in FIG. Fig.10 As shown, at the power saturation point of -5 dB in the medium power working range, the first power amplification system 20A can maintain a relatively high back-off conversion efficiency.

[0096] When Figure 6 When the signal power of the input RF signal of the first power amplification system 20A shown in FIG. (a) is between -5dB and 0dB, the first power amplification system 20A is in a high power working range. At this time, the first master amplifier M1, the first slave amplifier A1 and the second slave amplifier A2 are all working. Figure 7As shown, the current of the branch where the first master amplifier M1 is located remains unchanged, and the current of the branch where the first slave amplifier A1 and the second slave amplifier A2 are located gradually increases to the maximum value. Figure 8 As shown in FIG. 1 , the voltage of the branch where the first master amplifier M1 is located remains unchanged, and the voltage of the branch where the first slave amplifier A1 is located gradually increases to the maximum value. The voltage of the branch where the second slave amplifier A2 is located also gradually increases. At this time, the load impedance of the three branches is transformed as follows: Fig. 9 As shown, impedance inversion is achieved through the first wavelength line L1 and the second wavelength line L2 respectively, and output impedance matching is performed in combination with the seventh wavelength line L7. Under the effect of load pulling, the power of the RF signals output by the first main amplifier M1, the first slave amplifier A1 and the second slave amplifier A2 can be synthesized to obtain the second RF signal. Fig.10 As shown, at the power saturation point of 0 dB in the high power working range, the first power amplification system 20A can maintain a relatively high full-load conversion efficiency.

[0097] In some examples, such as Figure 6 As shown in Figure (b), in actual applications, based on Figure 6 The multi-channel Doherty architecture of the structure in Figure (a) also includes a third wavelength line L3, a fourth wavelength line L4, a fifth wavelength line L5 and a sixth wavelength line L6. The output end of the first slave amplifier A1 is coupled to the second end of the first wavelength line L1 through the third wavelength line L3 and the fourth wavelength line L4. The output end of the second slave amplifier A2 is coupled to the second end of the second wavelength line L2 through the fifth wavelength line L5 and the sixth wavelength line L6. Based on the first wavelength line L1, the second wavelength line L2, the third wavelength line L3, the fourth wavelength line L4, the fifth wavelength line L5, the sixth wavelength line L6 and the seventh wavelength line L7, the power synthesis of the multi-channel RF signals is jointly implemented to obtain the second RF signal. Figure 6 The schematic diagram of the power synthesis effect of the structure shown in Figure (b) is similar to Figure 7 , Figure 8 , Fig. 9 and Fig.10 In some examples, the impedance can be adjusted in the subsequent device of the first amplification system 20A to omit the seventh wavelength line L7. Figure 6 In the embodiment shown in FIG. (b), at least six wavelength lines as impedance transformation lines are required in the first power amplification system 20A to achieve power synthesis to obtain the second RF signal. Figure 5 In the embodiment shown in FIG. (b), as the number of branches increases, the number of impedance transformation lines also increases greatly, which causes a sharp increase in the area overhead of the first power amplification system 20A.

[0098] Exemplarily, when the first power amplification system 20A is based on a Doherty architecture including three branches, as shown in FIG. Fig.11 As shown in (a) of the figure, the first power amplification system 20A includes a first main amplifier M1, a first slave amplifier A1, a second slave amplifier A2, a first wavelength line L1, a second wavelength line L2, a third wavelength line L3 and a fourth wavelength line L4. The output end of the first main amplifier M1 is coupled to the first end of the first wavelength line L1. The second end of the first wavelength line L1 is coupled to the first end of the second wavelength line L2. The second end of the second wavelength line L2 is used to output a second radio frequency signal. The output end of the first slave amplifier A1 is coupled to the first end of the third wavelength line L3. The second end of the third wavelength line L3 is coupled to the first end of the fourth wavelength line L4. The second end of the fourth wavelength line L4 is coupled to the second end of the first wavelength line L1. As shown in FIG. Fig.12 , Fig.13 , Fig.14 and Fig.15 As shown, Fig.11 FIG. 1 is a schematic diagram of a circuit parameter and a power variation curve of an input radio frequency signal of a first power amplification system 20A as shown in FIG. 1 . Fig.12 Schematic diagram of the current change curve of each branch and the power change curve of the input RF signal. Fig.13 Schematic diagram of the voltage of each branch and the power variation curve of the input RF signal. Fig.14 It is a schematic diagram of the load impedance of each branch and the power change curve of the input RF signal.

[0099] Fig.15 Schematic diagram of the conversion efficiency and power change curve of the input RF signal of the first power amplification system 20A. In the figure, line ① is the branch where the first master amplifier M1 is located. Line ② is the branch where the first slave amplifier A1 is located, and line ③ is the branch where the second slave amplifier A2 is located. Take 0dB as the maximum operating power point of the first power amplification system 20A as an example:

[0100] When Fig.11 When the signal power of the input RF signal of the first power amplification system 20A shown in FIG. (a) is below -9.6 dB, the first power amplification system 20A is in a low power working range. At this time, the first master amplifier M1 is working, and the first slave amplifier A1 and the second slave amplifier A2 are not working. In the low power working range, as the signal power of the input RF signal increases, Fig.12 As shown, the current in the branch where the first master amplifier M1 is located gradually increases, and the current in the branch where the first slave amplifier A1 and the second slave amplifier A2 are located remains at 0. Fig.13 As shown, the voltages of the branches where the first master amplifier M1 and the first slave amplifier A1 are located are gradually increasing, and the voltage of the branch where the second slave amplifier A2 is located is 0. Fig.14As shown, the impedance of the branch where the first main amplifier M1 is located remains constant, and the impedance of the branch where the first slave amplifier A1 and the second slave amplifier A2 are located remains infinite. At this time, the RF signal output by the first main power amplifier M1 is used as the second RF signal. Fig.15 As shown, at the saturation power point of -9.6 dB in the low power working range, the first power amplification system 20A can maintain a relatively high back-off conversion efficiency.

[0101] When the signal power of the input RF signal is between -9.6dB and -6.2dB, Fig.11 The first power amplification system 20A shown in FIG. (a) is in the medium power working range. At this time, the first master amplifier M1 and the first slave amplifier A1 are working and the second slave amplifier A2 is not working. Fig.12 As shown in FIG. 1 , the currents in the branches where the first master amplifier M1 and the first slave amplifier A1 are located gradually increase. The current in the branch where the second slave amplifier A2 is located remains at 0. Fig.13 As shown in FIG. 1 , the voltage of the branch where the first master amplifier M1 is located keeps the maximum voltage value unchanged, and the voltage of the first slave amplifier A1 gradually increases to the maximum voltage value. The voltage of the second slave amplifier A2 gradually rises. Fig.12 He Ru Fig.13 As shown in FIG. 1 , in the medium power operation interval after the first slave amplifier A1 is turned on, the voltage of the branch where the first master amplifier M1 is located remains unchanged. Fig.14 As shown, impedance inversion can be achieved based on the first wavelength line L1, that is, Fig.14 As shown: after the first slave amplifier A1 is turned on, as the signal power of the input RF signal increases, the first wavelength line L1 reduces the load impedance of the branch where the first main amplifier M1 is located, thereby increasing the current of the branch where the first main amplifier M1 is located, so that the signal power of the RF signal output by the first main amplifier M1 can still increase in the medium power working range. At this time, the load impedance of the branch where the second slave amplifier A2 is located still remains infinite, while the load impedance of the branch where the first slave amplifier A1 is located gradually decreases. Under the effect of load traction, the first main amplifier M1 and the first slave amplifier A1 can synthesize the RF signal power output by the first main amplifier M1 and the first slave amplifier A1 to obtain a second RF signal. The second wavelength line L2, the third wavelength line L3 and the fourth wavelength line L4 can perform output impedance matching in the process of inputting the second RF signal. As shown Fig.15 As shown, at the power saturation point of -6.2 dB in the medium power working range, the first power amplification system 20A can maintain a relatively high back-off conversion efficiency.

[0102] When Fig.11When the signal power of the input RF signal of the first power amplification system 20A shown in FIG. (a) is between -6.2 dB and 0 dB, the first power amplification system 20A is in a high power working range. At this time, the first master amplifier M1, the first slave amplifier A1 and the second slave amplifier A2 are all working. Fig.12 As shown, the currents of the branches where the first master amplifier M1, the first slave amplifier A1 and the second slave amplifier A2 are located gradually increase to the maximum value of the saturation power point. Fig.13 As shown in FIG. 1 , the voltage of the branch where the first master amplifier M1 and the first slave amplifier A1 are located remains at the maximum value, and the voltage of the branch where the second slave amplifier A2 is located also gradually increases to the maximum value. At this time, the load impedance of the three branches is transformed as follows: Fig.14 As shown, impedance inversion is achieved through the first wavelength line L1 and the third wavelength line L3 respectively, and output impedance matching is performed in combination with the second wavelength line L2 and the fourth wavelength line L4. Under the effect of load pulling, the power of the RF signals output by the first main amplifier M1, the first slave amplifier A1 and the second slave amplifier A2 can be synthesized to obtain the second RF signal. Fig.15 As shown, at the power saturation point of 0 dB in the high power working range, the first power amplification system 20A can maintain a relatively high full-load conversion efficiency.

[0103] In some examples, it is also possible to Figure 5 , Figure 6 and Fig.11 The Doherty architecture shown is deformed to obtain an inverse Doherty architecture or an asymmetric Doherty architecture, etc.

[0104] Including the above Figure 5 , Figure 6 and Fig.11 In the first power amplifier system 20A of the structure shown or the Doherty architecture obtained based on its deformation, as the number of branches in the Doherty architecture increases, a larger back-off amount can be obtained, and the requirements of improving conversion efficiency and reducing static power consumption under a larger bandwidth can be met. However, these Doherty architectures all need to realize the power synthesis of the RF signals output by multiple branches based on the wavelength line as the impedance transformation line. The wavelength line will bring a large area overhead, and as the number of branches increases, the area overhead of the wavelength line will also increase sharply, thereby limiting the development of the Doherty architecture.

[0105] In order to reduce the area overhead caused by the wavelength line, in some possible implementations, such as Figure 4The power amplifier system 20 shown can be a second power amplifier system combining a Doherty architecture with a hybrid coupler. The second power amplifier system includes a hybrid coupler, a first impedance transformation line, a second impedance transformation line and at least two power amplifiers. Among them, the at least two power amplifiers include a first amplifier and a second amplifier. The output end of the first amplifier is coupled to the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the hybrid coupler through the second impedance transformation line. Among them, the first amplifier and the second amplifier are respectively used to output a radio frequency signal. The hybrid coupler is used to: perform impedance transformation with the first impedance transformation line and / or the second impedance transformation line, and output a synthetic radio frequency signal from the fourth end of the hybrid coupler. The synthetic radio frequency signal is synthesized by the first radio frequency signal and the second radio frequency signal. In an embodiment of the present application, in the second power amplifier system, the hybrid coupler can be equivalent to a wavelength line, and impedance transformation is performed with the first impedance transformation line and / or the second impedance transformation line to achieve load pulling between multiple branches. Based on the hybrid coupler, it is possible to achieve power synthesis of multiple branches on the basis of reducing wavelength lines, thereby achieving a reduction in the area overhead of the power amplifier system 20 on the basis of having higher back-off conversion efficiency and full-load conversion efficiency and lower static power consumption.

[0106] In some possible implementations, such as Fig.16 As shown, the hybrid coupler coupler1 includes four ports. When the fourth end of the hybrid coupler coupler1 is used as a reference, the coupling end, the through end and the isolation end of the hybrid coupler are distributed as shown in FIG. Fig.16 As shown. Among them, the fourth end is the output end of the hybrid coupler. When the hybrid coupler coupler1 is equivalent to a wavelength line, different equivalent effects can be achieved according to the different connection conditions of the coupling end, the straight-through end and the isolation end of the hybrid coupler. For example, in some examples, one of the coupling end, the straight-through end and the isolation end can be grounded. In some examples, one of the coupling end, the straight-through end and the isolation end can be left vacant. In some examples, two of the coupling end, the straight-through end and the isolation end can be grounded, or two of the coupling end, the straight-through end and the isolation end can be left vacant. In some examples, the coupling end, the straight-through end and the isolation end can be coupled to a branch respectively.

[0107] In some possible implementations, the third terminal of the hybrid coupler coupler1 may be grounded:

[0108] In some examples, when the third terminal of the hybrid coupler coupler1 is grounded, the second power amplification system is a Doherty architecture including two branches. Fig.17As shown, the second power amplification system 20B includes a first amplifier PA1, a second amplifier PA2, a first impedance transformation line Z1, and a second impedance transformation line Z2. The output end of the first amplifier PA1 is coupled to the first end of the hybrid coupler coupler1 through the first impedance transformation line Z1. The output end of the second amplifier PA2 is coupled to the second end of the hybrid coupler coupler1 through the second impedance transformation line Z2. The minimum operating power of the first amplifier PA1 is less than the minimum operating power of the second amplifier PA2. Fig.17 In the embodiment, the RF signals output by the first amplifier PA1 and the second amplifier PA2 are power synthesized by the hybrid coupler coupler 1 to obtain a synthesized RF signal. The synthesized RF signal can be used as the second RF signal output by the second power amplification system 20B. Fig.17 In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. In the application embodiment, as Fig.17 The impedance transformation and load pulling characteristics of the second power amplifier system 20B are shown in FIG. Figure 5 The impedance transformation and load-pull characteristics of the embodiment shown are consistent. The area overhead of the hybrid coupler coupler1 is less than the area overhead of the wavelength line as the impedance transformation line. Figure 5 In the implementation method of Figure (b), Fig.17 In the embodiment shown, a hybrid coupler 1 is used to reduce two wavelength lines. Figure 5 The area overhead is greatly reduced based on the fallback conversion efficiency, full load conversion efficiency and static power consumption of the embodiment in Figure (b).

[0109] In some examples, when Fig.17 When the two-branch structure described in the related embodiments is applied to a three-branch structure, the second power amplification system 20B further includes a third amplifier.

[0110] In some examples, when based on Fig.17When the two-way Doherty architecture shown is applied to the three-way Doherty architecture, the power amplification system also includes a third amplifier. The output end of the first amplifier PA1 is coupled to the first end of the hybrid coupler through a first impedance transformation line. The output end of the second amplifier PA2 is coupled to the second end of the hybrid coupler through a second impedance transformation line. The output end of the third amplifier is coupled to the fourth end of the hybrid coupler. The minimum operating power of the second amplifier PA2 is less than the minimum operating power of the third amplifier. The minimum operating power of the first amplifier PA1 is less than the minimum operating power of the second amplifier PA2. For example, Fig.18 As shown, the second power amplification system 20B includes a first main amplifier M1, a first slave amplifier A1, a second slave amplifier A2, a first wavelength line L1, and a third wavelength line L3. The output end of the first main amplifier M1 is coupled to the first end of the hybrid coupler coupler1 through the first wavelength line L1. The output end of the first slave amplifier A1 is coupled to the second end of the hybrid coupler coupler1 through the third wavelength line L3. The output end of the second slave amplifier A2 is coupled to the fourth end of the hybrid coupler coupler1. At this time, Fig.18 The first wavelength line L1 corresponds to Fig.17 The first impedance transformation line Z1 in Fig.18 The third wavelength line L3 in corresponds to the second impedance transformation line Z2. Fig.18 The first main amplifier M1 corresponds to Fig.17 The first amplifier PA1 in Fig.18 The first slave amplifier A1 corresponds to Fig.17 The second amplifier PA2 in. Fig.18 The second slave amplifier A2 in the amplifier is the third amplifier. At this time, the minimum operating power of the first amplifier PA1 is less than the minimum operating power of the second amplifier PA2. And the minimum operating power of the second amplifier PA2 is less than the minimum operating power of the third amplifier. For example, Fig.18 As shown, the second power amplification system 20B may also include a fifth wavelength line L5 and a sixth wavelength line L6. The output end of the second slave amplifier A2 (i.e., the third amplifier) ​​is coupled to the fourth end of the hybrid coupler coupler1 through the fifth wavelength line L5 and the sixth wavelength line L6 connected in series. At this time, after the hybrid coupler coupler1 synthesizes the RF signals output by the first slave amplifier A1 and the first main amplifier M1 to obtain a synthesized RF signal, the synthesized RF signal output by the fourth end of the hybrid coupler coupler1 is synthesized with the RF signal output by the second slave amplifier A2 to obtain a second RF signal. Fig.18In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. In the embodiment of the present application, as Fig.18 The impedance transformation and load pulling effect diagram of the embodiment shown in FIG. Figure 6 The impedance transformation and load pulling effect of the embodiment shown in FIG. Figure 1 In the embodiment of the present application, the Figure 6 In the embodiment shown, the area overhead caused by the second wavelength line L2 and the fourth wavelength line L4 is realized based on the area overhead caused by the second wavelength line L2 and the fourth wavelength line L4. Figure 6 The embodiments have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0111] For example, when based on Fig.17 When the two-way Doherty architecture shown is applied to the three-way Doherty architecture, when the third end of the hybrid coupler coupler1 is grounded, the second power amplification system 20B also includes a third amplifier and a third impedance transformation line; the output end of the first amplifier PA1 is coupled to the first end of the hybrid coupler coupler1 through the first impedance transformation line Z1. The output end of the second amplifier PA2 is coupled to the second end of the hybrid coupler coupler1 through the second impedance transformation line Z2. The output end of the third amplifier is coupled to the fourth end of the hybrid coupler coupler1 through the third impedance transformation line. The minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier PA1. The minimum operating power of the first amplifier PA1 is less than the minimum operating power of the second amplifier PA2. Exemplarily, as Fig.19As shown, in the embodiment of the present application, the first amplifier PA1 may be the first slave amplifier A1, the second amplifier PA2 may be the second slave amplifier A2, the third amplifier may be the first master amplifier M1, the first impedance transformation line Z1 may be the third wavelength line L3, the second impedance transformation line Z2 may be the eighth wavelength line L8, and the third impedance transformation line may be the first wavelength line L1. At this time, after the hybrid coupler coupler1 synthesizes the RF signals output by the first slave amplifier A1 and the second slave amplifier A2 to obtain a synthesized RF signal, the synthesized RF signal output by the fourth end of the hybrid coupler coupler1 is synthesized with the RF signal output by the first master amplifier M1 to obtain a second RF signal. Fig.19 In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.19 The impedance transformation and load pulling effect diagram of the embodiment shown in FIG. Fig.11 The impedance transformation and load pulling effect of the embodiment shown in FIG. Figure 1 In the embodiment of the present application, the Fig.11 The fourth wavelength line L4 and the ninth wavelength line L9 in the embodiment shown in the figure are realized on the basis of the area overhead caused by the fourth wavelength line L4 and the ninth wavelength line L9. Fig.11 The embodiments have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0112] In some examples, when based on Fig.17When the two-way Doherty architecture shown is applied to the three-way Doherty architecture, when the third end of the hybrid coupler coupler1 is grounded, the second power amplification system 20B also includes a third amplifier, a third impedance transformation line and a fourth impedance transformation line; the output end of the first amplifier PA1 is coupled to the first end of the hybrid coupler coupler1 through the first impedance transformation line Z1. The output end of the second amplifier PA2 is coupled to the first end of the hybrid coupler coupler1 through the second impedance transformation line Z2 and the fourth impedance transformation line connected in series; the output end of the third amplifier is coupled to the second end of the hybrid coupler coupler1 through the third impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier PA1. The minimum operating power of the first amplifier PA1 is less than the minimum operating power of the second amplifier PA2. Exemplarily, as Fig. 20 As shown, in the embodiment of the present application, the first amplifier PA1 may be the first slave amplifier A1, the second amplifier PA2 may be the second slave amplifier A2, the third amplifier may be the first master amplifier M1, the first impedance transformation line Z1 may be the third wavelength line L3, the second impedance transformation line Z2 may be the eighth wavelength line L8, the third impedance transformation line may be the first wavelength line L1, and the fourth impedance transformation line may be the ninth wavelength line L9. At this time, the RF signal output by the second slave amplifier A2 is synthesized with the RF signal output by the first slave amplifier A1 and then output to the coupling end of the hybrid coupler coupler1, the RF signal output by the first master amplifier M1 is transmitted to the through end of the hybrid coupler coupler1, and the fourth end of the hybrid coupler coupler1 outputs the synthesized RF signal, which may be used as the second RF signal output by the second power amplification system 20B. Fig. 20 In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig. 20 The impedance transformation and load pulling effect diagram of the embodiment shown in FIG. Fig.11 The impedance transformation and load pulling effect of the embodiment shown in FIG. Figure 1In the embodiment of the present application, the Fig.11 In the embodiment shown, the area overhead caused by the second wavelength line L2 and the fourth wavelength line L4 is realized based on the area overhead caused by the second wavelength line L2 and the fourth wavelength line L4. Fig.11 The embodiments have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0113] In some possible implementations, when the third end of the hybrid coupler coupler1 is grounded, the second power amplification system 20B may include three branches. At this time, the second power amplification system 20B also includes a third amplifier. The output end of the first amplifier PA2 is coupled to the first end of the hybrid coupler through a first impedance transformation line. The output end of the third amplifier is coupled to the first end of the hybrid coupler. The output end of the second amplifier PA2 is coupled to the second end of the hybrid coupler through a second impedance transformation line. In some examples, the second power amplification system 20B also includes a third impedance transformation line and a fourth impedance transformation line. The output end of the third amplifier is coupled to the first end of the hybrid coupler through a third impedance transformation line and a fourth impedance transformation line connected in series. Exemplarily, as Fig.21 As shown, in the embodiment of the present application, the first amplifier PA1 can be the first main amplifier M1, the second amplifier PA2 can be the second slave amplifier A2, the third amplifier can be the first slave amplifier A1, the first impedance transformation line can be the first wavelength line L1, the second impedance transformation line can be the fifth wavelength line L5, the third impedance transformation line can be the third wavelength line L3, and the fourth impedance transformation line can be the fourth wavelength line L4. At this time, the RF signals output by the first main amplifier M1 and the first slave amplifier A1 are synthesized and transmitted to the isolation end of the hybrid coupler coupler1, and the RF signal output by the second slave amplifier A2 is transmitted to the through end of the hybrid coupler coupler1. Then the synthesized RF signal is output by the fourth end of the hybrid coupler coupler1. Fig.21 In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1. Although not illustrated, in some other examples, the third end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.21 The impedance transformation and load pulling effect diagram of the embodiment shown in FIG. Figure 6 The impedance transformation and load pulling effect of the embodiment shown in FIG. Figure 1 In the embodiment of the present application, the Figure 6 In the embodiment shown, the area overhead caused by the second wavelength line L2 and the sixth wavelength line L6 is realized based on the area overhead caused by the second wavelength line L2 and the sixth wavelength line L6. Figure 6 The embodiments have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0114] In some possible implementations, the second power amplification system 20B further includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, a second impedance transformation line, and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line and the third impedance transformation line connected in series. The output end of the third amplifier is coupled to the first end of the third impedance transformation line, and is coupled to the first end of the hybrid coupler through the second end of the third impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line. The minimum operating power of the third amplifier is greater than the minimum operating power of the first amplifier and less than the minimum operating power of the second amplifier. In some examples, the second power amplification system 20 further includes a fourth impedance transformation line and a fifth impedance transformation line. The output end of the third amplifier is coupled to the first end of the third impedance transformation line through the fourth impedance transformation line and the fifth impedance transformation line connected in series. For example, as Fig. 22 As shown, the first amplifier may be the first main amplifier M1, the second amplifier may be the second slave amplifier A2, the third amplifier may be the first slave amplifier A1, the first impedance transformation line may be the first wavelength line L1, the second impedance transformation line may be the fifth wavelength line L5, the third impedance transformation line may be the second wavelength line L2, the fourth impedance transformation line may be the third wavelength line L3, and the fifth impedance transformation line may be the fourth wavelength line L4. At this time, the RF signals output by the first main amplifier M1 and the first slave amplifier A1 are synthesized and transmitted to the through-end of the hybrid coupler coupler1, and the RF signal output by the second slave amplifier A2 is transmitted to the coupling end of the hybrid coupler coupler1. Then the synthesized RF signal is output by the fourth end of the hybrid coupler coupler1. As shown in FIG. Fig. 22In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig. 22 The impedance transformation and load pulling effect diagram of the embodiment shown in FIG. Figure 6 The impedance transformation and load pulling effect of the embodiment shown in FIG. Figure 1 In the embodiment of the present application, the Figure 6 The sixth wavelength line L6 and the seventh wavelength line L7 in the embodiment shown in the figure are realized on the basis of the area overhead brought by the sixth wavelength line L6 and the seventh wavelength line L7. Fig.11 The embodiments have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0115] In some implementations, the third terminal of the hybrid coupler coupler1 may be left vacant:

[0116] In some examples, when the third end of the hybrid coupler coupler1 is vacant, the second power amplification system 20B is based on two branches. At this time, the second power amplification system 20B includes a first amplifier, a second amplifier, a first impedance transformation line, a second impedance transformation line, and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line. The fourth end of the hybrid coupler is coupled to the third impedance transformation line. Fig.23 As shown, the first amplifier may be a first master amplifier M1, the second amplifier may be a first slave amplifier A1, the first impedance transformation line may be a first wavelength line L1, the second impedance transformation line may be a third wavelength line L3, and the third impedance transformation line may be a second wavelength line L2. Fig.23In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.23 In the embodiment shown, after adopting the hybrid coupler coupler1, it is possible to Figure 5 The embodiment shown in the figure is based on the area overhead caused by the fourth wavelength line L4, and Figure 5 The embodiments have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0117] In some examples, when the third terminal of the hybrid coupler coupler1 is vacant, based on Fig.23 and the two-branch architecture of its related embodiments, the second power amplification system 20B can be an architecture including three branches. At this time, the second power amplification system 20B includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, a second impedance transformation line and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line. The first end of the third impedance transformation line is coupled to the fourth end of the hybrid coupler. The output end of the third amplifier is coupled to the second end of the third impedance transformation line. The minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier. The minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier. Exemplarily, the second power amplification system 20B also includes a fourth impedance transformation line and a fifth impedance transformation line. The output end of the third amplifier is coupled to the second end of the third impedance transformation line through the fourth impedance transformation line and the fifth impedance transformation line connected in series. As Fig.24 As shown, the first amplifier may be a first master amplifier M1, the second amplifier may be a first slave amplifier A1, the third amplifier may be a second slave amplifier A2, the first impedance transformation line may be a first wavelength line L1, the second impedance transformation line may be a third wavelength line L3, the third impedance transformation line may be a second wavelength line L2, the fourth impedance transformation line may be a fifth wavelength line L5, and the fifth impedance transformation line may be a sixth wavelength line L6. Fig.24 In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.24 In the embodiment shown, after adopting the hybrid coupler coupler1, the effects of impedance transformation and load pulling are as follows: Figure 7 , Figure 8 , Fig. 9 and Fig.10 Therefore, in Figure 6 The embodiment shown in FIG. (b) is realized on the basis of the area overhead caused by the fourth wavelength line L4. Figure 6 The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0118] In some examples, when the third end of the hybrid coupler coupler1 is vacant, the second power amplification system 20B can be an architecture including three branches. At this time, the second power amplification system 20B also includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, a second impedance transformation line and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line and the third impedance transformation line connected in series; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the output end of the third amplifier is coupled to the first end of the third impedance transformation line, and is coupled to the first end of the hybrid coupler through the second end of the third impedance transformation line; the minimum operating power of the third amplifier is greater than the minimum operating power of the first amplifier and less than the minimum operating power of the second amplifier. Exemplarily, the second power amplification system 20B also includes a fourth impedance transformation line and a fifth impedance transformation line. The output end of the third amplifier is coupled to the first end of the third impedance transformation line through the fourth impedance transformation line and the fifth impedance transformation line connected in series. Exemplarily, as Fig.25As shown, the first amplifier may be the first master amplifier M1, the second amplifier may be the second slave amplifier A2, the third amplifier may be the first slave amplifier A1, the first impedance transformation line may be the first wavelength line L1, the second impedance transformation line may be the fifth wavelength line L5, the third impedance transformation line may be the second wavelength line L2, the fourth impedance transformation line may be the third wavelength line L3, and the fifth impedance transformation line may also be the fourth wavelength line L4. Fig.25 In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.25 In the embodiment shown, after adopting the hybrid coupler coupler1, the effects of impedance transformation and load pulling are as follows: Figure 7 , Figure 8 , Fig. 9 and Fig.10 Therefore, in Figure 6 The embodiment shown in FIG. (b) is realized on the basis of the area overhead caused by the sixth wavelength line L6. Figure 6 The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0119] In some examples, when the third end of the hybrid coupler coupler1 is vacant, the second power amplification system 20B can be an architecture including three branches. At this time, the second power amplification system 20B also includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, a second impedance transformation line, a third impedance transformation line and a fourth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the first end of the fourth impedance transformation line is coupled to the fourth end of the hybrid coupler; the output end of the third amplifier is coupled to the second end of the fourth impedance transformation line through the third impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier. The minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier. Exemplarily, as Fig.26 As shown, the first amplifier may be the first slave amplifier A1, the second amplifier may be the second slave amplifier A2, the third amplifier may be the first master amplifier M1, the first impedance transformation line may be the third wavelength line L3, the second impedance transformation line may be the eighth wavelength line L8, the third impedance transformation line may be the first wavelength line L1, and the fourth impedance transformation line may be the fourth wavelength line L4. Fig.26 In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.26 In the embodiment shown, after adopting the hybrid coupler coupler1, the effects of impedance transformation and load pulling are as follows: Fig.12 , Fig.13 , Fig.14 and Fig.15 Therefore, in Fig.11 The embodiment shown in FIG. (b) is realized based on the area overhead caused by reducing the ninth wavelength line L9. Fig.11 The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0120] In some examples, when the third end of the hybrid coupler coupler1 is vacant, the second power amplification system 20B can be an architecture including three branches. At this time, the second power amplification system 20B also includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, a second impedance transformation line, and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line. The output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series. The output end of the third amplifier is coupled to the second end of the hybrid coupler. The minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier. Exemplarily, the second power amplification system 20B also includes a fourth impedance transformation line and a fifth impedance transformation line. The output end of the third amplifier is coupled to the second end of the hybrid coupler through the fourth impedance transformation line and the fifth impedance transformation line connected in series. Fig. 27 As shown, the first amplifier may be a first master amplifier M1, the second amplifier may be a first slave amplifier A1, the third amplifier may be a second slave amplifier A2, the first impedance transformation line may be a first wavelength line L1, the second impedance transformation line may be a third wavelength line L3, the third impedance transformation line may be a fourth wavelength line L4, the fourth impedance transformation line may be a fifth wavelength line L5, and the fifth impedance transformation line may be a sixth wavelength line L6. Fig. 27 In the implemented embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. In the present application as Fig. 27 In the embodiment shown, after adopting the hybrid coupler coupler1, the effects of impedance transformation and load pulling are as follows: Figure 7 , Figure 8 , Fig. 9 and Fig.10 Therefore, in Figure 6 The embodiment shown in FIG. (b) is realized on the basis of reducing the area overhead caused by the second wavelength line L2. Figure 6 The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0121] In some examples, when the third end of the hybrid coupler coupler1 is vacant, the second power amplification system 20B can be an architecture including three branches. At this time, the second power amplification system 20B also includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, a second impedance transformation line, and a third impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series; the output end of the third amplifier is coupled to the fourth end of the hybrid coupler; the minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier. The minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier. Exemplarily, the second power amplification system 20B also includes a fourth impedance transformation line and a fifth impedance transformation line. The output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the fourth impedance transformation line and the fifth impedance transformation line connected in series. As Fig.28 As shown, the first amplifier may be a first master amplifier M1, the second amplifier may be a first slave amplifier A1, the third amplifier may be a second slave amplifier A2, the first impedance transformation line may be a first wavelength line L1, the second impedance transformation line may be a third wavelength line L3, the third impedance transformation line may be a fourth wavelength line L4, the fourth impedance transformation line may be a fifth wavelength line L5, and the fifth impedance transformation line may be a sixth wavelength line L6. Fig.28 In the implemented embodiment, the third end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.28 In the embodiment shown, after adopting the hybrid coupler coupler1, the effects of impedance transformation and load pulling are as follows: Figure 7 , Figure 8 , Fig. 9 and Fig.10 Therefore, in Figure 6 The embodiment shown in FIG. (b) is realized on the basis of reducing the area overhead caused by the second wavelength line L2. Figure 6The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0122] In some examples, when the third end of the hybrid coupler coupler1 is vacant, the second power amplification system 20B can be an architecture including three branches. At this time, the second power amplification system 20B also includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, a second impedance transformation line, a third impedance transformation line and a fourth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series; the output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the fourth impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier. The minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier. Exemplarily, as Fig.29 As shown, the first amplifier may be the first slave amplifier A1, the second amplifier may be the second slave amplifier A2, the third amplifier may be the first master amplifier M1, the first impedance transformation line may be the third wavelength line L3, the second impedance transformation line may be the eighth wavelength line L8, the third impedance transformation line may be the ninth wavelength line L9, and the fourth impedance transformation line may be the first wavelength line L1. Fig.29 In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.29 In the embodiment shown, after adopting the hybrid coupler coupler1, the effects of impedance transformation and load pulling are as follows: Fig.12 , Fig.13 , Fig.14 and Fig.15 Therefore, in Fig.11 The embodiment shown in FIG. (b) is realized on the basis of the area overhead caused by the fourth wavelength line L4. Fig.11 The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0123] In some examples, when the third end of the hybrid coupler coupler1 is vacant, the second power amplification system 20B can be an architecture including three branches. At this time, the second power amplification system 20B also includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, a second impedance transformation line, a third impedance transformation line and a fourth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series; the output end of the third amplifier is coupled to the second end of the hybrid coupler through the fourth impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier. The minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier. Exemplarily, as Fig.30 As shown, the first amplifier may be the first slave amplifier A1, the second amplifier may be the second slave amplifier A2, the third amplifier may be the first master amplifier M1, the first impedance transformation line may be the third wavelength line L3, the second impedance transformation line may be the eighth wavelength line L8, the third impedance transformation line may be the ninth wavelength line L9, and the fourth impedance transformation line may be the first wavelength line L1. Fig.30 In the illustrated embodiment, the third end of the hybrid coupler coupler 1 is an isolation end relative to the fourth end of the hybrid coupler coupler 1, the first end of the hybrid coupler coupler 1 is a through end relative to the fourth end of the hybrid coupler coupler 1, and the second end of the hybrid coupler coupler 1 is a coupling end relative to the fourth end of the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the third end of the hybrid coupler coupler 1 may be a through end relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be an isolation end relative to the fourth end of the hybrid coupler coupler 1. The second end of the hybrid coupler coupler 1 may be a coupling end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.30 In the embodiment shown, after adopting the hybrid coupler coupler1, the effects of impedance transformation and load pulling are as follows: Fig.12 , Fig.13 , Fig.14 and Fig.15 Therefore, in Fig.11 The embodiment shown in FIG. (b) is realized on the basis of the area overhead caused by the fourth wavelength line L4. Fig.11 The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0124] In some possible implementations, the second end and the third end of the hybrid coupler coupler1 are grounded, or the second end and the third end of the hybrid coupler coupler1 are left vacant.

[0125] In some examples, when the second end and the third end of the hybrid coupler coupler1 are grounded, or the second end and the third end of the hybrid coupler coupler1 are left vacant, and the second power amplification system 20B includes two branches, Fig.31 As shown, the second power amplification system 20B includes a first amplifier PA1, a second amplifier PA2, a first impedance transformation line Z1, a second impedance transformation line Z2, and a third impedance transformation line Z3. The minimum operating power of the first amplifier PA1 is less than the minimum operating power of the second amplifier PA2; the output end of the first amplifier PA1 is coupled to the first end of the hybrid coupler coupler1 through the first impedance transformation line Z1; the output end of the second amplifier PA2 is coupled to the first end of the hybrid coupler coupler1 through the second impedance transformation line Z2 and the third impedance transformation line Z3 connected in series. Fig.31 In the illustrated embodiment, the second end and the third end of the hybrid coupler coupler 1 may be the isolation end and the coupling end, respectively, relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 is the through end relative to the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the second end and the third end of the hybrid coupler coupler 1 may be the coupling end and the through end, respectively, relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be the isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.31 In the embodiment shown, after using the hybrid coupler coupler1, the impedance transformation and load pulling effects are Figure 5 The embodiment shown in the figure is consistent. Therefore, in the example Figure 5 The embodiment shown in FIG. (b) is realized on the basis of the area overhead caused by the fourth wavelength line L4. Figure 5 The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0126] In some examples, when the second end and the third end of the hybrid coupler coupler1 are grounded, or the second end and the third end of the hybrid coupler coupler1 are left vacant, and the second power amplification system 20B includes three branches, Fig.31On the basis of the two-branch architecture shown, the second power amplification system 20B includes a first amplifier PA1, a second amplifier PA2, a third amplifier, a first impedance transformation line Z1, a second impedance transformation line Z2 and a third impedance transformation line Z3. The minimum operating power of the first amplifier PA1 is less than the minimum operating power of the second amplifier PA2; the output end of the first amplifier PA1 is coupled to the first end of the hybrid coupler coupler1 through the first impedance transformation line Z1; the output end of the second amplifier PA2 is coupled to the first end of the hybrid coupler coupler1 through the second impedance transformation line Z2 and the third impedance transformation line Z3 connected in series. The fourth end of the hybrid coupler is coupled to the output end of the third amplifier; the minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier. Exemplarily, the second power amplification system 20B also includes a fourth impedance transformation line and a fifth impedance transformation line. The output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the fourth impedance transformation line and the fifth impedance transformation line connected in series. Exemplarily, as Fig.32 As shown, the first amplifier PA1 may be the first master amplifier M1, the second amplifier PA2 may be the first slave amplifier A1, the third amplifier may be the second slave amplifier A2, the first impedance transformation line may be the first wavelength line L1, the second impedance transformation line may be the third wavelength line L3, the third impedance transformation line may be the fourth wavelength line L4, the fourth impedance transformation line may be the fifth wavelength line L5, and the fifth impedance transformation line may be the sixth wavelength line L6. In the present application, Fig.32 In the illustrated embodiment, the second end and the third end of the hybrid coupler coupler 1 may be the isolation end and the coupling end, respectively, relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 is the through end relative to the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the second end and the third end of the hybrid coupler coupler 1 may be the coupling end and the through end, respectively, relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be the isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.32 In the embodiment shown, after using the hybrid coupler coupler1, the impedance transformation and load pulling effects are Figure 6 The embodiment shown in FIG. (b) is consistent with FIG. Therefore, in the example Figure 6 The embodiment shown in FIG. (b) is realized on the basis of the area overhead caused by the fourth wavelength line L4. Figure 6 The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0127] In some examples, when the second end and the third end of the hybrid coupler coupler1 are grounded, or the second end and the third end of the hybrid coupler coupler1 are left vacant, and the second power amplification system 20B includes three branches, Fig.31 On the basis of the two-branch architecture shown, the second power amplification system 20B includes a first amplifier PA1, a second amplifier PA2, a third amplifier, a first impedance transformation line Z1, a second impedance transformation line Z2, a third impedance transformation line Z3 and a fourth impedance transformation line. The minimum operating power of the first amplifier PA1 is less than the minimum operating power of the second amplifier PA2; the output end of the first amplifier PA1 is coupled to the first end of the hybrid coupler coupler1 through the first impedance transformation line Z1; the output end of the second amplifier PA2 is coupled to the first end of the hybrid coupler coupler1 through the second impedance transformation line Z2 and the third impedance transformation line Z3 connected in series. The output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the fourth impedance transformation line. The minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier PA1. Exemplarily, as Fig.33 As shown, the first amplifier PA1 may be the first slave amplifier A1, the second amplifier PA2 may be the second slave amplifier A2, the third amplifier may be the first master amplifier M1, the first impedance transformation line may be the third wavelength line L3, the second impedance transformation line may be the eighth wavelength line L8, the third impedance transformation line may be the ninth wavelength line L9, and the fourth impedance transformation line may be the first wavelength line L1. Fig.33 In the illustrated embodiment, the second end and the third end of the hybrid coupler coupler 1 may be the isolation end and the coupling end, respectively, relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 is the through end relative to the hybrid coupler coupler 1. Although not shown in the figure, in some other examples, the second end and the third end of the hybrid coupler coupler 1 may be the coupling end and the through end, respectively, relative to the fourth end of the hybrid coupler coupler 1. The first end of the hybrid coupler coupler 1 may be the isolation end relative to the fourth end of the hybrid coupler coupler 1. In the present application, Fig.33 In the embodiment shown, after using the hybrid coupler coupler1, the impedance transformation and load pulling effects are Fig.11 The embodiment shown in FIG. (b) is consistent with FIG. Therefore, in the example Fig.11 The embodiment shown in FIG. (b) is realized on the basis of the area overhead caused by the fourth wavelength line L4. Figure 6 The embodiments in Figure (b) have equivalent fallback conversion efficiency, full load conversion efficiency and static power consumption.

[0128] In some possible implementations, the first end, the second end, and the third end of the hybrid coupler couper1 are respectively coupled with at least one branch. Taking the second power amplification system 20B including three branches as an example, the second power amplification system 20B includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, and a second impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; and the output end of the third amplifier is coupled to the third end of the hybrid coupler. Exemplarily, the second power amplification system 20B also includes a third impedance transformation line, a fourth impedance transformation line, and a fifth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line and the third impedance transformation line connected in series. The output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line and the fourth impedance transformation line connected in series. The output end of the third amplifier is coupled to the third end of the hybrid coupler through the fifth impedance transformation line. Exemplarily, as Fig.34 As shown, the first amplifier may be the first master amplifier M1, the second amplifier may be the first slave amplifier A1, the third amplifier may be the second slave amplifier A2, the first impedance transformation line may be the tenth wavelength line L10, the second impedance transformation line may be the twelfth wavelength line L12, the third impedance transformation line may be the eleventh wavelength line L11, the fourth impedance transformation line may be the thirteenth wavelength line L13, and the fifth impedance transformation line may be the fourteenth wavelength line L14. The first end of the hybrid coupler coupler1 is a coupling end relative to the fourth end of the hybrid coupler coupler1; the second end of the hybrid coupler coupler1 is a through end relative to the fourth end of the hybrid coupler coupler1; and the third end of the hybrid coupler coupler1 is an isolation end relative to the fourth end of the hybrid coupler coupler1. About Fig.34 The curve of the circuit parameters changing with the signal power of the input RF signal is shown as follows Fig.35 , Fig.36 , Fig.37 and Fig.38 shown. Fig.35 for Fig.34 The diagram is a schematic diagram of a curve showing a change in the current of each branch of the second power amplification system 20B with the power of the input radio frequency signal. Fig.36 for Fig.34 The diagram is a schematic diagram of a curve showing a change in voltage of each branch of the second power amplification system 20B as a function of the power of the input radio frequency signal. Fig.37 for Fig.34 The diagram is a schematic diagram of a curve showing a change in impedance load of each branch of the second power amplification system 20B as a function of the power of the input radio frequency signal. Fig.38 for Fig.34The conversion efficiency of the second power amplification system 20B shown in the figure is a schematic diagram of a curve showing a change in the power of the input RF signal. In the figure, line ① is the branch where the first master amplifier M1 is located. Line ② is the branch where the first slave amplifier A1 is located, and line ③ is the branch where the second slave amplifier A2 is located. It can be seen that, taking 0dB as the maximum operating power point of the second power amplification system 20B as an example, the power operating range below -13.8dB is the low-power operating range of the second power amplification system 20B. The power operating range from -13.8dB to -7.7dB is the medium-power range of the second power amplification system 20B. The power operating range from -7.7dB to 0dB is the high-power range of the second power amplification system 20B. According to Fig.35 , Fig.36 and Fig.37 It can be seen that Fig.34 The embodiment shown can be based on the aforementioned Figure 5 , Figure 6 , Fig.11 , Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 , Fig. 22 , Fig.23 , Fig.24 , Fig.25 , Fig.26 , Fig. 27 , Fig.28 , Fig.29 , Fig.30 , Fig.31 , Fig.32 and Fig.33 The embodiment of the present invention adopts completely different load-pulling changes to realize power synthesis of radio frequency signals output by multiple branches to obtain a second radio frequency signal.

[0129] In some possible implementations, the first end, the second end, and the third end of the hybrid coupler couper1 are respectively coupled with at least one branch. Taking the second power amplification system 20B including three branches as an example, the second power amplification system 20B includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, and a second impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; and the output end of the third amplifier is coupled to the third end of the hybrid coupler. Exemplarily, the second power amplification system 20B also includes a third impedance transformation line and a fourth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line and the third impedance transformation line connected in series. The output end of the third amplifier is coupled to the third end of the hybrid coupler through the fourth impedance transformation line. Exemplarily, as Fig.39 As shown, the first amplifier may be a first master amplifier M1, the second amplifier may be a first slave amplifier A1, the third amplifier may be a second slave amplifier A2, the first impedance transformation line may be a tenth wavelength line L10, the second impedance transformation line may be a twelfth wavelength line L12, the third impedance transformation line may be an eleventh wavelength line L11, and the fourth impedance transformation line may be a fourteenth wavelength line L14. The first end of the hybrid coupler coupler1 is a through end relative to the fourth end of the hybrid coupler coupler1; the second end of the hybrid coupler coupler1 is an isolation end relative to the fourth end of the hybrid coupler coupler1; and the third end of the hybrid coupler coupler1 is a coupling end relative to the fourth end of the hybrid coupler coupler1. For example, as Fig.40 As shown, the first amplifier may be the second slave amplifier A2, the second amplifier may be the first master amplifier M1, and the third amplifier may be the first slave amplifier A1. The first impedance transformation line may be the fourteenth wavelength line L14, the second impedance transformation line may be the tenth wavelength line L10, and the third impedance transformation line may be the fifteenth wavelength line L15. The first end of the hybrid coupler coupler1 is a through end relative to the fourth end of the hybrid coupler coupler1; the second end of the hybrid coupler coupler1 is a coupling end relative to the fourth end of the hybrid coupler coupler1; and the third end of the hybrid coupler coupler1 is an isolation end relative to the fourth end of the hybrid coupler coupler1.

[0130] In some possible implementations, the first end, the second end, and the third end of the hybrid coupler couper1 are respectively coupled with at least one branch. Taking the second power amplification system 20B including three branches as an example, the second power amplification system 20B includes a first amplifier, a second amplifier, a third amplifier, a first impedance transformation line, and a second impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; and the output end of the third amplifier is coupled to the third end of the hybrid coupler. Exemplarily, the second power amplification system 20B also includes a third impedance transformation line, a fourth impedance transformation line, and a fifth impedance transformation line. The output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line and the third impedance transformation line connected in series. The output end of the third amplifier is coupled to the third end of the hybrid coupler through the fourth impedance transformation line and the fifth impedance transformation line connected in series. Exemplarily, as Fig.41As shown, the first amplifier may be the first master amplifier M1, the second amplifier may be the second slave amplifier A2, the third amplifier may be the first slave amplifier A1, the first impedance transformation line may be the tenth wavelength line L10, the second impedance transformation line may be the fourteenth wavelength line L14, the third impedance transformation line may be the eleventh wavelength line L11, the fourth impedance transformation line may be the twelfth wavelength line L12, and the fifth impedance transformation line may be the thirteenth wavelength line L13. The first end of the hybrid coupler coupler1 is a coupling end relative to the fourth end of the hybrid coupler coupler1; the second end of the hybrid coupler coupler1 is a through end relative to the fourth end of the hybrid coupler coupler1; and the third end of the hybrid coupler coupler1 is an isolation end relative to the fourth end of the hybrid coupler coupler1.

[0131] like Fig.39 , Fig.40 and Fig.41 The curve of the circuit parameters of the embodiment shown in FIG. 1 and the signal power of the input radio frequency signal is shown in FIG. Fig.42 , Fig.43 , Fig.44 and Fig.45 shown. Fig.42 for Fig.39 , Fig.40 and Fig.41 The diagram is a schematic diagram of a curve showing a change in the current of each branch of the second power amplification system 20B with the power of the input radio frequency signal. Fig.43 for Fig.39 , Fig.40 and Fig.41 The diagram is a schematic diagram of a curve showing a change in voltage of each branch of the second power amplification system 20B as a function of the power of the input radio frequency signal. Fig.44 for Fig.39 , Fig.40 and Fig.41 The diagram is a schematic diagram of a curve showing a change in impedance load of each branch of the second power amplification system 20B as a function of the power of the input radio frequency signal. Fig.45 for Fig.39 , Fig.40 and Fig.41The conversion efficiency of the second power amplification system 20B shown in the figure is a schematic diagram of a curve showing a change in the power of the input RF signal. In the figure, line ① is the branch where the first master amplifier M1 is located. Line ② is the branch where the first slave amplifier A1 is located, and line ③ is the branch where the second slave amplifier A2 is located. It can be seen that, taking 0dB as the maximum operating power point of the second power amplification system 20B as an example, the power operating range below -7.7dB is the low-power operating range of the second power amplification system 20B. The power operating range from -7.7dB to -5dB is the medium-power range of the second power amplification system 20B. The power operating range from -5dB to 0dB is the high-power range of the second power amplification system 20B. According to Fig.42 , Fig.43 , Fig.44 and Fig.45 It can be seen that Fig.39 , Fig.40 and Fig.41 The embodiment shown can be based on the aforementioned Figure 5 , Figure 6 , Fig.11 , Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 , Fig. 22 , Fig.23 , Fig.24 , Fig.25 , Fig.26 , Fig. 27 , Fig.28 , Fig.29 , Fig.30 , Fig.31 , Fig.32 , Fig.33 and Fig.34 The embodiment of the present invention adopts different load-pulling changes to realize power synthesis of radio frequency signals output by multiple branches to obtain a second radio frequency signal.

[0132] In some possible implementations, Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 , Fig. 22 , Fig.23 , Fig.24 , Fig.25 , Fig.26 , Fig. 27 , Fig.28 , Fig.29 , Fig.30 , Fig.31 , Fig.32 , Fig.33 , Fig.34 , Fig.39 , Fig.40 and Fig.41 In the illustrated embodiment, the hybrid coupler coupler1 may be a coupler of a three-dimensional stacked structure. For example, it may be a coupler based on a waveguide suspension line process, or a suspended coupler based on a substrate integrated suspended line (SISL) process. In the embodiment of the present application, a coupler of a three-dimensional stacked structure is used as the hybrid coupler coupler1. Compared with a traditional coupler, a coupler of a three-dimensional stacked structure is formed by a multi-layer stacked structure, which can reduce the occupied area of ​​the coupler. When the hybrid coupler coupler1 is a suspended coupler, taking the frequency band of the input RF signal as 860MHz as an example, the line length of a wavelength line is about 52mm, and the length of a hybrid coupler coupler1 is 6mm, which can greatly reduce the area overhead of the second power amplifier system 20B.

[0133] In some possible implementations, when the second power amplification system 20B is a multi-branch structure having more than three branches, it may include the aforementioned Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 , Fig. 22 , Fig.23 , Fig.24 , Fig.25 , Fig.26 , Fig. 27 , Fig.28 , Fig.29 , Fig.30 , Fig.31 , Fig.32 , Fig.33 , Fig.34 , Fig.39 , Fig.40 and Fig.41 One or more structures in the embodiment shown. At this time, one or more hybrid couplers 1 can be used to achieve power synthesis.

[0134] For example, in Fig.17 , Fig.18 , Fig.21 , Fig.23 , Fig.24 , Fig.25 , Fig. 27 , Fig.28 , Fig.31 and Fig.32In the embodiment of the present invention, the second power amplification system 20B may further include a seventh wavelength line. The first end of the seventh wavelength line is coupled to the fourth end of the hybrid coupler coupler1, and the second end of the seventh wavelength line serves as the output end of the second power amplification system 20B. In the embodiment of the present application, the output impedance matching of the second power amplification system 20B is achieved by the seventh wavelength line. In some other embodiments, the seventh wavelength line may not be set in the second power amplification system 20B, but may be set in the subsequent stage device of the second power amplification system 20B, or the impedance of the subsequent stage device of the second power amplification system 20B may be adjusted.

[0135] For example, in Fig.17 , Fig.19 , Fig.26 , Fig.29 and Fig.30 In the embodiment of the present invention, the second power amplification system 20B may further include a second wavelength line. The fourth end of the hybrid coupler coupler1 is coupled to the first end of the second wavelength line. The second end of the second wavelength line serves as the output end of the second power amplification system 20B. In the embodiment of the present application, the output impedance matching of the second power amplification system 20B is achieved by the second wavelength line. In some other embodiments, the second wavelength line may not be set in the second power amplification system 20B, but the second wavelength line may be set in the subsequent device of the second power amplification system 20B, or the impedance of the subsequent device of the second power amplification system 20B may be adjusted.

[0136] The embodiment of the present application provides a power amplification system, a radio frequency transmission system and a signal transmission device. In the power amplification system, a hybrid coupler is used in combination with multiple amplification branches to realize impedance transformation and load pulling, so as to synthesize the radio frequency signals output by the multiple amplification branches to obtain a second radio frequency signal. Multiple amplification branches require a certain number of wavelength lines as impedance transformation lines to realize the power synthesis of multiple radio frequency signals. However, the area overhead of the wavelength line is large, which restricts the development of the power amplification system of multiple amplification branches. In the embodiment of the present application, by setting a hybrid coupler, the number of wavelength lines required for multiple amplification branches can be reduced. And as the number of amplification branches increases, the number of hybrid couplers that can be set is also more, and the degree of reduction in the area overhead of the power amplification system is also greater. At the same time, the more the number of wavelength lines equivalently reduced by each hybrid coupler, the greater the degree of reduction in the area overhead of the power amplification system. The scheme described in the embodiments of the present application can greatly reduce the limitation of the area overhead of the impedance transformation line on the development of the power amplifier system with multiple amplification branch architecture, so as to better apply the architecture of multiple amplification branches based on the impedance transformation line to application scenarios with large bandwidth, high back-off conversion efficiency, high full-load conversion efficiency and low static power consumption.

[0137] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0138] In the several embodiments provided in the present application, it should be understood that the disclosed systems and devices can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules is only a logical function division, and there may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0139] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one device or distributed on multiple devices. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0140] In addition, each functional module in each embodiment of the present application may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

[0141] The signal transmitting device in the embodiment of the present application may be a device for realizing a wireless communication function, such as a terminal or a chip that can be used in a terminal, etc. The terminal may be a UE, an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a terminal agent or a terminal device in a 5G network, a 6G network or a public land mobile network (PLMN) in the future. The access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the electronic device and the transmitting device may be mobile or fixed.

[0142] In a possible implementation, the signal transmitting device in the embodiment of the present application may be a network device that communicates with the terminal device. The network device may include a transmission and reception point (TRP), a base station, a remote radio unit (RRU) or a baseband unit (BBU) (also referred to as a digital unit (DU)) of a separated base station, a satellite, a drone, a broadband network gateway (BNG), a converged switch, a non-3GPP access device, a relay station or an access point, etc.

[0143] In addition, the base station can be a base transceiver station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA) network, an NB (Node B) in wideband code division multiple access (WCDMA), an eNB or eNodeB (evolutional NodeB) in LTE, a wireless controller in a cloud radio access network (CRAN) scenario, or a base station in a 5G communication system (such as a next-generation Node B (gNodeB, gNB)), or a base station in a future evolution network, etc., without specific limitation here.

[0144] In addition, the communication architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of the communication architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0145] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A power amplification system, characterized in that: The invention comprises a hybrid coupler, a first amplifier, a second amplifier, a first impedance transformation line and a second impedance transformation line; the output end of the first amplifier is coupled to the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the hybrid coupler through the second impedance transformation line; wherein: The first amplifier and the second amplifier are used to output radio frequency signals; The hybrid coupler is used for: performing impedance transformation with the first impedance transformation line and / or the second impedance transformation line; A synthesized radio frequency signal is output from the fourth end of the hybrid coupler; the synthesized radio frequency signal is synthesized by a plurality of the radio frequency signals.

2. The power amplification system according to claim 1, characterized in that: The power amplification system also includes a third amplifier; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; and the output end of the third amplifier is coupled to the third end of the hybrid coupler.

3. The power amplification system according to claim 1, characterized in that: The third terminal of the hybrid coupler is grounded; the minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier.

4. The power amplification system according to claim 3, characterized in that: The power amplification system also includes a third amplifier; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the output end of the third amplifier is coupled to the fourth end of the hybrid coupler; the minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier.

5. The power amplification system according to claim 3, characterized in that: The power amplification system further includes a third amplifier and a third impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the third impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier.

6. The power amplification system according to claim 3, characterized in that: The power amplification system further includes a third amplifier, a third impedance transformation line and a fourth impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the fourth impedance transformation line connected in series; the output end of the third amplifier is coupled to the second end of the hybrid coupler through the third impedance transformation line; and the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier.

7. The power amplification system according to claim 3, characterized in that: The power amplification system also includes a third amplifier; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the third amplifier is coupled to the first end of the hybrid coupler; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the minimum operating power of the third amplifier is greater than the minimum operating power of the first amplifier and less than the minimum operating power of the second amplifier.

8. The power amplification system according to claim 3, characterized in that: The power amplification system further includes a third amplifier and a third impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line and the third impedance transformation line connected in series; the output end of the third amplifier is coupled to the first end of the third impedance transformation line, and is coupled to the first end of the hybrid coupler through the second end of the third impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the minimum operating power of the third amplifier is greater than the minimum operating power of the first amplifier and less than the minimum operating power of the second amplifier.

9. The power amplification system according to claim 1, characterized in that: The third end of the hybrid coupler is vacant; the minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier.

10. The power amplification system according to claim 9, characterized in that: The power amplification system further includes a third amplifier and a third impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the first end of the third impedance transformation line is coupled to the fourth end of the hybrid coupler; the output end of the third amplifier is coupled to the second end of the third impedance transformation line; the minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier.

11. The power amplification system according to claim 9, characterized in that: The power amplification system further includes a third amplifier and a third impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line and the third impedance transformation line connected in series; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the output end of the third amplifier is coupled to the first end of the third impedance transformation line, and is coupled to the first end of the hybrid coupler through the second end of the third impedance transformation line; the minimum operating power of the third amplifier is greater than the minimum operating power of the first amplifier and less than the minimum operating power of the second amplifier.

12. The power amplification system according to claim 9, characterized in that: The power amplification system further includes a third amplifier, a third impedance transformation line and a fourth impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line; the first end of the fourth impedance transformation line is coupled to the fourth end of the hybrid coupler; the output end of the third amplifier is coupled to the second end of the fourth impedance transformation line through the third impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier.

13. The power amplification system according to claim 9, characterized in that: The power amplification system further includes a third amplifier and a third impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series; the output end of the third amplifier is coupled to the second end of the hybrid coupler; the minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier.

14. The power amplification system according to claim 9, characterized in that: The power amplification system further includes a third amplifier and a third impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series; the output end of the third amplifier is coupled to the fourth end of the hybrid coupler; the minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier.

15. The power amplification system according to claim 9, characterized in that: The power amplification system further includes a third amplifier, a third impedance transformation line and a fourth impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler; the output end of the second amplifier is coupled to the second end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series; the output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the fourth impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier.

16. The power amplification system according to claim 9, characterized in that: The power amplification system further includes a third amplifier, a third impedance transformation line and a fourth impedance transformation line; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series; the output end of the third amplifier is coupled to the second end of the hybrid coupler through the fourth impedance transformation line; the minimum operating power of the third amplifier is less than the minimum operating power of the first amplifier.

17. The power amplification system according to claim 1, characterized in that: The second end and the third end of the hybrid coupler are grounded, or the second end and the third end of the hybrid coupler are left vacant; the power amplification system further comprises a third impedance transformation line; the minimum operating power of the first amplifier is less than the minimum operating power of the second amplifier; the output end of the first amplifier is coupled to the first end of the hybrid coupler through the first impedance transformation line; the output end of the second amplifier is coupled to the first end of the hybrid coupler through the second impedance transformation line and the third impedance transformation line connected in series.

18. The power amplification system according to claim 17, characterized in that: The power amplification system further includes a third amplifier; the fourth end of the hybrid coupler is coupled to the output end of the third amplifier; and the minimum operating power of the second amplifier is less than the minimum operating power of the third amplifier.

19. The power amplification system according to claim 17, characterized in that: The power amplification system also includes a third amplifier and a fourth impedance transformation line; the output end of the third amplifier is coupled to the fourth end of the hybrid coupler through the fourth impedance transformation line; the minimum power of the third amplifier is less than the minimum operating power of the first amplifier.

20. The power amplification system according to any one of claims 1 to 19, characterized in that: The hybrid coupler is a coupler based on a three-dimensional stacking structure.

21. A radio frequency transmission system, characterized in that: The radio frequency transmission system comprises a radio frequency generation circuit and a power amplification system as described in any one of claims 1 to 20; the output end of the radio frequency generation circuit is coupled to the input end of the power amplification system.

22. A signal transmitting device, characterized in that: The signal transmitting device comprises a baseband processing system and a radio frequency transmitting system as claimed in claim 21.

Images