A high linearity power amplifier based on dynamic feedback

Abstract

The application discloses a high-linearity power amplifier based on dynamic feedback, comprising a driving stage input matching network, a driving stage amplification network, a driving stage bias circuit, an inter-stage matching network, a power stage bias circuit, a dynamic feedback network and a power stage amplification matching network. The application is based on a common-emitter common-base amplification structure of a two-stage heterojunction bipolar transistor, and combines the dynamic feedback network, so that high-linearity indexes under high output power and low output power can be realized, and meanwhile, higher efficiency and gain indexes are also achieved.

Description

Technical Field

[0001] This invention belongs to the field of radio frequency integrated circuit technology, and specifically relates to a high linearity power amplifier based on dynamic feedback. Background Technology

[0002] With the development of technologies such as software-defined radio, broadband instruments, 5G communication, and ultra-wideband communication, the system bandwidth and speed indicators are constantly improving. This has led to higher market demands for the linearity of broadband amplifiers. In particular, to handle high-speed peak-to-average power ratio (PAPR) signals, amplifiers are required to achieve high linearity at both high and low output power levels.

[0003] To improve the linearity of driver amplifier chips at both high and low output power, the following techniques can be employed during chip design; however, these techniques all have some shortcomings:

[0004] (1) Power back-off technology, that is, selecting transistors with higher power or using a multi-channel high-power combining structure to make the amplifier work in the back-off linear amplification region to obtain high linearity index. However, in order to achieve high output power and high linearity under low output power, for example, a very large transistor size is used, which greatly sacrifices the DC power consumption of the amplifier and the efficiency of the amplifier is very low.

[0005] (2) Envelope tracking technology uses detection circuits, bias adjustment technology and other methods to track the output power of the amplifier. The bias circuit of the amplifier is automatically adjusted according to the dynamic range of the output power, thereby avoiding the drawback of the "one-size-fits-all" approach to high-power transistors in power back-off technology. This method has a good improvement effect, but the circuit structure is extremely complex and difficult to integrate on the chip.

[0006] (2) Passive negative feedback technology uses negative feedback technology to feed back a portion of the output RF signal to the input of the amplifier. After the intermodulation components are canceled, the linearity of the amplifier is improved. However, this feedback technology often uses passive RLC circuits, which have limited ability to coordinate adjustment under high output power and low output power. It is often difficult to achieve both states and cannot achieve the best cancellation effect, thus losing the meaning of dynamic adjustment. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a high linearity power amplifier based on dynamic feedback.

[0008] The technical solution of the present invention is: a high linearity power amplifier based on dynamic feedback, comprising a driver stage input matching network, a driver stage amplification network, a driver stage bias circuit, an inter-stage matching network, a power stage bias circuit, a dynamic feedback network, and a power stage amplification matching network;

[0009] The input terminal of the driver stage input matching network serves as the input terminal of the high linearity power amplifier, and its output terminal is connected to the input terminal of the driver stage amplification network, the output terminal of the driver stage bias circuit, and the output terminal of the dynamic feedback network, respectively.

[0010] The output of the driver stage amplifier network is connected to the input of the interstage matching network and the input of the power stage bias circuit, respectively.

[0011] The first output of the power stage amplification matching network serves as the output of the high linearity power amplifier. Its second output is connected to the input of the dynamic feedback network, and its input is connected to the output of the interstage matching network and the output of the power stage bias circuit, respectively.

[0012] The beneficial effects of this invention are: Based on the common-emitter common-base amplification structure of a two-stage heterojunction bipolar transistor, combined with a dynamic feedback network, this invention can achieve high linearity under both high and low output power, while also having high efficiency and gain.

[0013] Furthermore, the driver-stage input matching network includes capacitor C1, ground capacitor C2, and capacitor C... 17 Grounding resistor R1, resistor R2, and inductor L1;

[0014] One end of capacitor C1 serves as the input terminal of the driver stage input matching network and is connected to the grounding resistor R1; the other end of capacitor C1 is connected to the grounding capacitor C2 and one end of inductor L1; the other end of inductor L1 is connected to one end of resistor R2 and capacitor C1. 17 One end of resistor R2 is connected; the other end of resistor R2 serves as the output of the input matching network of the driver stage, and is connected to capacitor C. 17 The other end is connected.

[0015] The beneficial effects of the above-mentioned further solutions are: in this invention, the grounding resistor R1 is beneficial to improving the extremely low frequency stability of the amplifier, while the RLC matching network is beneficial to achieving good input impedance matching.

[0016] Furthermore, the driver stage amplification network includes transistors Q1, Q2, Q3, and Q4, microstrip line TL1 and TL2, grounding resistors R3 and R4, resistors R5 and R6, resistors R7 and R8, grounding capacitors C3 and C4, and inductor L2.

[0017] One end of microstrip line TL1 serves as the input terminal of the driver stage amplifier network and is connected to one end of microstrip line TL2; the other end of microstrip line TL1 is connected to the base of transistor Q1; the collector of transistor Q1 is connected to the emitter of transistor Q2; the emitter of transistor Q1 is connected to ground resistor R3; the base of transistor Q2 is connected to ground capacitor C3 and one end of resistor R5; the collector of transistor Q2 serves as the output terminal of the driver stage amplifier network and is connected to the collector of transistor Q4 and... One end of inductor L2 is connected; the base of transistor Q3 is connected to the other end of microstrip line TL2; the collector of transistor Q3 is connected to the emitter of transistor Q4; the emitter of transistor Q3 is connected to grounding resistor R4; the base of transistor Q4 is connected to grounding capacitor C4 and one end of resistor R6; the other end of resistor R5 is connected to the other end of resistor R6, one end of resistor R7, and grounding resistor R8; the other end of resistor R7 is connected to the other end of inductor L2 and the collector supply voltage V. C1 connect.

[0018] The beneficial effects of the above-mentioned further solutions are: In this invention, the common-emitter common-base amplification structure based on a bipolar transistor with a dual-level heterojunction can achieve high power gain and large power capacity, while having good high-frequency stability characteristics.

[0019] Furthermore, the interstage matching network includes inductor L3, inductor L4, grounding capacitor C7, and capacitor C8;

[0020] One end of inductor L3 serves as the input of the interstage matching network, and its other end is connected to the grounding capacitor C7 and one end of inductor L4 respectively; the other end of inductor L4 is connected to one end of capacitor C8; the other end of capacitor C8 serves as the output of the interstage matching network.

[0021] The beneficial effects of the above-mentioned further solutions are: In this invention, the interstage matching network is used to achieve good matching between the output impedance of the driver stage amplification network and the input impedance of the power stage amplification and matching network, thereby reducing insertion loss and improving interstage stability.

[0022] Furthermore, the driver stage bias circuit includes transistors Q5, Q6, and Q7, resistor R9, and resistor R. 10 Resistance R 11 Grounding capacitor C5 and grounding capacitor C6;

[0023] resistor R 10 One end is connected to the collector supply voltage V C1 Connect to grounding capacitor C6; resistor R 10The other end is connected to one end of resistor R9 and the collector of transistor Q7; the base of transistor Q6 is connected to the base of transistor Q7, the collector of transistor Q6, the other end of resistor R9, and grounding capacitor C5; the emitter of transistor Q6 is connected to the base and collector of transistor Q5; the emitter of transistor Q5 is grounded; the emitter of transistor Q7 and resistor R9 are connected to the collector of transistor Q5. 11 One end is connected; resistor R 11 The other end serves as the output of the driver stage bias circuit.

[0024] The beneficial effects of the above-mentioned further solutions are: In this invention, the drive stage bias circuit has a dynamic adaptive function, which can automatically adjust and compensate for the static current fluctuation problem caused by temperature changes according to the needs of the transistor circuit, thereby improving temperature consistency and reliability.

[0025] Furthermore, the power stage bias circuit includes transistor Q. 13 Transistor Q 14 Transistor Q 15 Grounding capacitor C9, grounding capacitor C 10 Resistance R 17 Resistance R 18 Resistance R 19 and inductor L5;

[0026] One end of inductor L5 serves as the input terminal of the power stage bias circuit, while the other end is connected to ground capacitor C9 and resistor R. 18 One end is connected; transistor Q 13 The base of each capacitor is connected to the grounding capacitor C. 10 Resistance R 19 One end of the transistor Q 14 collector and transistor Q 14 The base connection of the transistor Q; 13 The collectors are respectively connected to resistor R 18 The other end and resistor R 19 The other end is connected; transistor Q 13 emitter and resistor R 17 One end is connected; resistor R 17 The other end serves as the output of the power stage bias circuit; transistor Q 14 The emitters are respectively connected to the transistor Q. 15 The base and transistor Q 15 collector connection; transistor Q 15 The emitter is grounded.

[0027] The beneficial effects of the above-mentioned further solutions are: In this invention, the power stage bias circuit has a dynamic adaptive function, which can automatically adjust and compensate for the static current fluctuation caused by temperature changes according to the needs of the transistor circuit, thereby improving temperature consistency and reliability.

[0028] Furthermore, the dynamic feedback network includes transistor Q8 and capacitor C. 11 Grounding capacitor C 12 Resistance R 14 Grounding capacitor C 12 Resistance R 13 Resistance R 14 Resistance R 15 and resistance R 16 ;

[0029] The collector of transistor Q8 serves as the input terminal of the dynamic feedback network and is connected to resistor R. 16 One end is connected; the base of transistor Q8 is connected to the ground capacitor C. 12 and resistance R 15 One end is connected; the emitter of transistor Q8 and resistor R 13 One end is connected; resistor R 15 The other end is connected to resistor R respectively 16 The other end and resistor R 14 One end is connected; resistor R 14 The other end is connected to capacitor C. 11 One end, grounding resistance R 12 and resistance R 13 The other end is connected; capacitor C 11 The other end serves as the output of the dynamic feedback network.

[0030] The beneficial effect of the above-mentioned further solution is that, in this invention, the dynamic feedback network can automatically adjust the feedback depth according to the magnitude of the feedback signal, thereby dynamically improving the linearity index of the entire amplifier.

[0031] Furthermore, the power stage amplification matching network includes transistor Q9 and transistor Q... 10 Transistor Q 11 Transistor Q 12 Microstrip line TL3, microstrip line TL4, grounding capacitor C 13 Capacitor C 14 Grounding capacitor C 15 Capacitor C 16 Grounding inductance L6, inductance L7, grounding resistance R 20 Grounding resistance R 21 Resistance R 22 Resistance R 23 Grounding resistance R 24 and resistance R25 ;

[0032] One end of microstrip line TL3 serves as the input to the power stage amplification matching network and is connected to the other end of microstrip line TL4; the base of transistor Q9 is connected to the other end of microstrip line TL3; the collector of transistor Q9 is connected to the other end of transistor Q4. 10 The emitter connection of transistor Q9; the emitter and ground resistor R 20 Connection; Transistor Q 10 The base of each capacitor is connected to the grounding capacitor C. 13 and resistance R 22 One end is connected; transistor Q 10 The collector of the transistor serves as the second output terminal of the power stage amplification matching network, and is connected to one end of inductor L7 and transistor Q, respectively. 12 collector and capacitor C 16 One end is connected; transistor Q 11 The base of the transistor is connected to the other end of the microstrip line TL4; transistor Q 11 collector and transistor Q 12 emitter connection; transistor Q 11 emitter and grounding resistance R 21 Connection; Transistor Q 12 The bases are respectively connected to resistor R 23 One end and grounding capacitor C 14 Connection; Resistor R 22 The other end is connected to resistor R respectively 23 The other end, grounding resistance R 24 and resistance R 25 One end is connected; resistor R 25 The other end is connected to the other end of inductor L7 and grounding capacitor C respectively. 15 and collector supply voltage V C2 Connection; Capacitor C 16 The other end serves as the first output of the power stage amplification matching network and is connected to the grounding inductor L6.

[0033] The beneficial effects of the above-mentioned further solutions are as follows: In this invention, the power stage amplification matching network is based on the common-emitter common-base amplification structure of a two-stage heterojunction bipolar transistor, which can achieve high power gain and large power capacity, while having good high-frequency stability characteristics and good output matching characteristics. Attached Figure Description

[0034] Figure 1 The diagram shown is a block diagram of a high linearity power amplifier based on dynamic feedback provided by an embodiment of the present invention.

[0035] Figure 2The diagram shown is a circuit diagram of a high linearity power amplifier based on dynamic feedback provided by an embodiment of the present invention. Detailed Implementation

[0036] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, the present invention provides a high linearity power amplifier based on dynamic feedback, including a driver stage input matching network, a driver stage amplification network, a driver stage bias circuit, an inter-stage matching network, a power stage bias circuit, a dynamic feedback network, and a power stage amplification matching network;

[0038] The input terminal of the driver stage input matching network serves as the input terminal of the high linearity power amplifier, and its output terminal is connected to the input terminal of the driver stage amplification network, the output terminal of the driver stage bias circuit, and the output terminal of the dynamic feedback network, respectively.

[0039] The output of the driver stage amplifier network is connected to the input of the interstage matching network and the input of the power stage bias circuit, respectively.

[0040] The first output of the power stage amplification matching network serves as the output of the high linearity power amplifier. Its second output is connected to the input of the dynamic feedback network, and its input is connected to the output of the interstage matching network and the output of the power stage bias circuit, respectively.

[0041] In embodiments of the present invention, such as Figure 2 As shown, the driver-stage input matching network includes capacitor C1, ground capacitor C2, and capacitor C... 17 Grounding resistor R1, resistor R2, and inductor L1;

[0042] One end of capacitor C1 serves as the input terminal of the driver stage input matching network and is connected to the grounding resistor R1; the other end of capacitor C1 is connected to the grounding capacitor C2 and one end of inductor L1; the other end of inductor L1 is connected to one end of resistor R2 and capacitor C1. 17 One end of resistor R2 is connected; the other end of resistor R2 serves as the output of the input matching network of the driver stage, and is connected to capacitor C. 17 The other end is connected.

[0043] In embodiments of the present invention, such as Figure 2 As shown, the driver stage amplifier network includes transistors Q1, Q2, Q3, and Q4, microstrip line TL1 and TL2, grounding resistors R3 and R4, resistors R5 and R6, resistors R7 and R8, grounding capacitors C3 and C4, and inductor L2.

[0044] One end of microstrip line TL1 serves as the input terminal of the driver stage amplifier network and is connected to one end of microstrip line TL2; the other end of microstrip line TL1 is connected to the base of transistor Q1; the collector of transistor Q1 is connected to the emitter of transistor Q2; the emitter of transistor Q1 is connected to ground resistor R3; the base of transistor Q2 is connected to ground capacitor C3 and one end of resistor R5; the collector of transistor Q2 serves as the output terminal of the driver stage amplifier network and is connected to the collector of transistor Q4 and... One end of inductor L2 is connected; the base of transistor Q3 is connected to the other end of microstrip line TL2; the collector of transistor Q3 is connected to the emitter of transistor Q4; the emitter of transistor Q3 is connected to grounding resistor R4; the base of transistor Q4 is connected to grounding capacitor C4 and one end of resistor R6; the other end of resistor R5 is connected to the other end of resistor R6, one end of resistor R7, and grounding resistor R8; the other end of resistor R7 is connected to the other end of inductor L2 and the collector supply voltage V. C1 connect.

[0045] In embodiments of the present invention, such as Figure 2 As shown, the interstage matching network includes inductor L3, inductor L4, grounding capacitor C7, and capacitor C8;

[0046] One end of inductor L3 serves as the input of the interstage matching network, and its other end is connected to the grounding capacitor C7 and one end of inductor L4 respectively; the other end of inductor L4 is connected to one end of capacitor C8; the other end of capacitor C8 serves as the output of the interstage matching network.

[0047] In embodiments of the present invention, such as Figure 2 As shown, the driver stage bias circuit includes transistors Q5, Q6, and Q7, resistor R9, and resistor R. 10 Resistance R 11 Grounding capacitor C5 and grounding capacitor C6;

[0048] resistor R 10 One end is connected to the collector supply voltage V C1 Connect to grounding capacitor C6; resistor R 10 The other end is connected to one end of resistor R9 and the collector of transistor Q7; the base of transistor Q6 is connected to the base of transistor Q7, the collector of transistor Q6, the other end of resistor R9, and grounding capacitor C5; the emitter of transistor Q6 is connected to the base and collector of transistor Q5; the emitter of transistor Q5 is grounded; the emitter of transistor Q7 and resistor R9 are connected to the collector of transistor Q5. 11 One end is connected; resistor R 11 The other end serves as the output of the driver stage bias circuit.

[0049] In embodiments of the present invention, such as Figure 2As shown, the power stage bias circuit includes transistor Q. 13 Transistor Q 14 Transistor Q 15 Grounding capacitor C9, grounding capacitor C 10 Resistance R 17 Resistance R 18 Resistance R 19 and inductor L5;

[0050] One end of inductor L5 serves as the input terminal of the power stage bias circuit, while the other end is connected to ground capacitor C9 and resistor R. 18 One end is connected; transistor Q 13 The base of each capacitor is connected to the grounding capacitor C. 10 Resistance R 19 One end of the transistor Q 14 collector and transistor Q 14 The base connection of the transistor Q; 13 The collectors are respectively connected to resistor R 18 The other end and resistor R 19 The other end is connected; transistor Q 13 emitter and resistor R 17 One end is connected; resistor R 17 The other end serves as the output of the power stage bias circuit; transistor Q 14 The emitters are respectively connected to the transistor Q. 15 The base and transistor Q 15 collector connection; transistor Q 15 The emitter is grounded.

[0051] In embodiments of the present invention, such as Figure 2 As shown, the dynamic feedback network includes transistor Q8 and capacitor C. 11 Grounding capacitor C 12 Resistance R 14 Grounding capacitor C 12 Resistance R 13 Resistance R 14 Resistance R 15 and resistance R 16 ;

[0052] The collector of transistor Q8 serves as the input terminal of the dynamic feedback network and is connected to resistor R. 16 One end is connected; the base of transistor Q8 is connected to the ground capacitor C. 12 and resistance R 15 One end is connected; the emitter of transistor Q8 and resistor R 13 One end is connected; resistor R 15 The other end is connected to resistor R respectively 16 The other end and resistor R 14One end is connected; resistor R 14 The other end is connected to capacitor C. 11 One end, grounding resistance R 12 and resistance R 13 The other end is connected; capacitor C 11 The other end serves as the output of the dynamic feedback network.

[0053] In embodiments of the present invention, such as Figure 2 As shown, the power stage amplification matching network includes transistor Q9 and transistor Q... 10 Transistor Q 11 Transistor Q 12 Microstrip line TL3, microstrip line TL4, grounding capacitor C 13 Capacitor C 14 Grounding capacitor C 15 Capacitor C 16 Grounding inductance L6, inductance L7, grounding resistance R 20 Grounding resistance R 21 Resistance R 22 Resistance R 23 Grounding resistance R 24 and resistance R 25 ;

[0054] One end of microstrip line TL3 serves as the input to the power stage amplification matching network and is connected to the other end of microstrip line TL4; the base of transistor Q9 is connected to the other end of microstrip line TL3; the collector of transistor Q9 is connected to the other end of transistor Q4. 10 The emitter connection of transistor Q9; the emitter and ground resistor R 20 Connection; Transistor Q 10 The base of each capacitor is connected to the grounding capacitor C. 13 and resistance R 22 One end is connected; transistor Q 10 The collector of the transistor serves as the second output terminal of the power stage amplification matching network, and is connected to one end of inductor L7 and transistor Q, respectively. 12 collector and capacitor C 16 One end is connected; transistor Q 11 The base of the transistor is connected to the other end of the microstrip line TL4; transistor Q 11 collector and transistor Q 12 emitter connection; transistor Q 11 emitter and grounding resistance R 21 Connection; Transistor Q 12 The bases are respectively connected to resistor R 23 One end and grounding capacitor C 14 Connection; Resistor R 22 The other end is connected to resistor R respectively 23 The other end, grounding resistance R24 and resistance R 25 One end is connected; resistor R 25 The other end is connected to the other end of inductor L7 and grounding capacitor C respectively. 15 and collector supply voltage V C2 Connection; Capacitor C 16 The other end serves as the first output of the power stage amplification matching network and is connected to the grounding inductor L6.

[0055] The following is combined Figure 2 The specific working principle and process of this invention are described below: The radio frequency (RF) signal enters the driver stage input matching network. After input impedance matching, the RF signal enters the driver stage amplification network after being superimposed with the feedback signal of the dynamic feedback network for signal amplification. Then, it enters the interstage matching network. After interstage impedance matching, it enters the power stage amplification matching network for signal amplification. Part of the signal enters the output port of the amplifier, and part of it is fed back to the driver stage amplification network as a feedback signal. The dynamic feedback network can automatically adjust the feedback depth according to the magnitude of the feedback signal, thereby dynamically improving the linearity of the entire amplifier.

[0056] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of the invention, and should be understood that the scope of protection of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the technical teachings disclosed in this invention without departing from the spirit of the invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A high linearity power amplifier based on dynamic feedback, characterized in that, It includes the driver stage input matching network, driver stage amplification network, driver stage bias circuit, inter-stage matching network, power stage bias circuit, dynamic feedback network, and power stage amplification matching network; The input terminal of the driver stage input matching network serves as the input terminal of the high linearity power amplifier, and its output terminal is connected to the input terminal of the driver stage amplification network, the output terminal of the driver stage bias circuit, and the output terminal of the dynamic feedback network, respectively. The output terminal of the driver stage amplification network is connected to the input terminal of the interstage matching network and the input terminal of the power stage bias circuit, respectively; the driver stage amplification network includes transistors Q1, Q2, Q3, and Q4, microstrip line TL1, microstrip line TL2, grounding resistors R3, R4, R5, R6, R7, R8, grounding capacitors C3 and C4, and inductor L2; One end of the microstrip line TL1 is connected with one end of the microstrip line TL2 as the input terminal of the driving stage amplification network; the other end of the microstrip line TL1 is connected with the base of the triode Q1; the collector of the triode Q1 is connected with the emitter of the triode Q2; the emitter of the triode Q1 is connected with the grounding resistor R3; the base of the triode Q2 is connected with the grounding capacitor C3 and one end of the resistor R5 respectively; the collector of the triode Q2 is connected with the collector of the triode Q4 and one end of the inductor L2 as the output terminal of the driving stage amplification network; the base of the triode Q3 is connected with the other end of the microstrip line TL2; the collector of the triode Q3 is connected with the emitter of the triode Q4; the emitter of the triode Q3 is connected with the grounding resistor R4; the base of the triode Q4 is connected with the grounding capacitor C4 and one end of the resistor R6 respectively; the other end of the resistor R5 is connected with the other end of the resistor R6, one end of the resistor R7 and the grounding resistor R8 respectively; the other end of the resistor R7 is connected with the other end of the inductor L2 and the collector power supply voltage V C1 respectively; one end of the inductor L1 is connected with the grounding capacitor C1 and the other end of the resistor R2 respectively; the other end of the inductor L1 is connected with the base of the triode Q1; one end of the inductor L2 is connected with the grounding capacitor C2 and the other end of the resistor R4 respectively; the other end of the inductor L2 is connected with the collector of the triode Q2; one end of the inductor L3 is connected with the grounding capacitor C5 and the other end of the resistor R7 respectively; the other end of the inductor L3 is connected with the collector of the triode Q3; one end of the inductor L4 is connected with the grounding capacitor C6 and the other end of the resistor R8 respectively; the other end of the inductor L4 is connected with the collector of the triode Q4. The first output terminal of the power stage amplification matching network serves as the output terminal of the high linearity power amplifier, its second output terminal is connected to the input terminal of the dynamic feedback network, and its input terminal is connected to the output terminal of the interstage matching network and the output terminal of the power stage bias circuit, respectively.

2. The high linearity power amplifier based on dynamic feedback according to claim 1, characterized in that, The driver stage input matching network includes a capacitor C1, a grounded capacitor C2, a capacitor C 17 , a grounded resistor R1, a resistor R2, and an inductor L1. One end of the capacitor C1 is connected with the ground resistance R1 as the input end of the input matching network of the driving stage, and the other end of the capacitor C1 is connected with the ground capacitor C2 and one end of the inductor L1 respectively; the other end of the inductor L1 is connected with one end of the resistance R2 and one end of the capacitor C 17 respectively; the other end of the resistance R2 is connected with the other end of the capacitor C 17 as the output end of the input matching network of the driving stage.

3. The high linearity power amplifier based on dynamic feedback according to claim 1, characterized in that, The interstage matching network includes inductor L3, inductor L4, grounding capacitor C7, and capacitor C8; One end of the inductor L3 serves as the input of the interstage matching network, and its other end is connected to the grounding capacitor C7 and one end of the inductor L4, respectively; the other end of the inductor L4 is connected to one end of the capacitor C8; the other end of the capacitor C8 serves as the output of the interstage matching network.

4. The high linearity power amplifier based on dynamic feedback according to claim 1, characterized in that, The drive stage biasing circuit includes a transistor Q5, a transistor Q6, a transistor Q7, a resistor R9, a resistor R 10 , a resistor R 11 , a ground capacitor C5 and a ground capacitor C6; one end of the resistor R 10 is connected with the collector power supply voltage V C1 and the ground capacitor C6 respectively; the other end of the resistor R 10 is connected with one end of the resistor R9 and the collector of the transistor Q7 respectively; the base of the transistor Q6 is connected with the base of the transistor Q7, the collector of the transistor Q6, the other end of the resistor R9 and the ground capacitor C5 respectively; the emitter of the transistor Q6 is connected with the base of the transistor Q5 and the collector of the transistor Q5 respectively; the emitter of the transistor Q5 is grounded; the emitter of the transistor Q7 and one end of the resistor R 11 are connected; the other end of the resistor R 11 serves as the output terminal of the driving stage bias circuit.

5. The high linearity power amplifier based on dynamic feedback according to claim 1, characterized in that, The power stage biasing circuit comprises a transistor Q 13 a transistor Q 14 a transistor Q 15 a ground capacitor C9, a ground capacitor C 10 a resistor R 17 a resistor R 18 a resistor R 19 and an inductor L5; One end of the inductor L5 is connected to the input end of the power stage bias circuit, and the other end is connected with the ground capacitor C9 and the resistor R 18 respectively; the base of the triode Q 13 is connected with the ground capacitor C 10 , one end of the resistor R 19 , the collector of the triode Q 14 and the base of the triode Q 14 respectively; the collector of the triode Q 13 is connected with the other end of the resistor R 18 and the other end of the resistor R 19 respectively; the emitter of the triode Q 13 is connected with one end of the resistor R 17 ; the other end of the resistor R 17 is the output end of the power stage bias circuit; the emitter of the triode Q 14 is connected with the base of the triode Q 15 and the collector of the triode Q 15 respectively; and the emitter of the triode Q 15 is grounded.

6. The high linearity power amplifier based on dynamic feedback according to claim 1, characterized in that, The dynamic feedback network comprises a triode Q8, a capacitor C 11 , a ground capacitor C 12 , a resistor R 14 , a ground capacitor C 12 , a resistor R 13 , a resistor R 14 , a resistor R 15 , and a resistor R 16 ; The collector of transistor Q8 serves as the input terminal of the dynamic feedback network and is connected to resistor R. 16 One end is connected; the base of the transistor Q8 is connected to the ground capacitor C. 12 and resistance R 15 One end is connected; the emitter of the transistor Q8 and the resistor R 13 One end is connected; the resistor R 15 The other end is connected to resistor R respectively 16 The other end and resistor R 14 One end is connected; the resistor R 14 The other end is connected to capacitor C. 11 One end, grounding resistance R 12 and resistance R 13 The other end is connected; the capacitor C 11 The other end serves as the output of the dynamic feedback network.

7. The high linearity power amplifier based on dynamic feedback according to claim 1, characterized in that, The power stage amplification matching network includes transistor Q9 and transistor Q. 10 Transistor Q 11 Transistor Q 12 Microstrip line TL3, microstrip line TL4, grounding capacitor C 13 Capacitor C 14 Grounding capacitor C 15 Capacitor C 16 Grounding inductance L6, inductance L7, grounding resistance R 20 Grounding resistance R 21 Resistance R 22 Resistance R 23 Grounding resistance R 24 and resistance R 25 ; One end of the microstrip line TL3 serves as the input terminal of the power stage amplification matching network and is connected to the other end of the microstrip line TL4; the base of the transistor Q9 is connected to the other end of the microstrip line TL3; the collector of the transistor Q9 is connected to the collector of the transistor Q4. 10 The emitter connection of the transistor Q9; the emitter and grounding resistor R 20 Connection; the transistor Q 10 The base of each capacitor is connected to the grounding capacitor C. 13 and resistance R 22 One end is connected; the transistor Q 10 The collector of the transistor serves as the second output terminal of the power stage amplification matching network, and is connected to one end of inductor L7 and transistor Q, respectively. 12 collector and capacitor C 16 One end is connected; the transistor Q 11 The base of the transistor is connected to the other end of the microstrip line TL4; the transistor Q 11 collector and transistor Q 12 The emitter connection; the transistor Q 11 emitter and grounding resistance R 21 Connection; the transistor Q 12 The bases are respectively connected to resistor R 23 One end and grounding capacitor C 14 Connection; the resistor R 22 The other end is connected to resistor R respectively 23 The other end, grounding resistance R 24 and resistance R 25 One end is connected; the resistor R 25 The other end is connected to the other end of inductor L7 and grounding capacitor C respectively. 15 and collector supply voltage V C2 Connection; the capacitor C 16 The other end serves as the first output of the power stage amplification matching network and is connected to the grounding inductor L6.

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