A 5G communication system and predistortion-based millimeter wave broadband power amplifier

Abstract

The application relates to a 5G communication system and a pre-distortion millimeter wave broadband-based power amplifier, which comprises an input matching module, a pre-distortion linearization module, an inter-stage matching module, a power amplification module and an output matching module connected in sequence, the inter-stage matching module comprises a single-input port and a double-output port, and the output matching module comprises a double-input port and a single-output port. The power amplifier can avoid the nonlinear problems caused by various parasitic effects through the pre-distortion linearization module; the pre-distortion linearization module is adopted to provide gain for the power amplification module, so that the problem of phase imbalance caused by the differential structure of the power amplifier can be avoided; the fourth capacitor of the pre-distortion linearization module improves the slope of the gain compensation curve of the power amplifier, so that the power amplifier can adaptively reduce the performance reduction caused by the process, thereby improving the linearity and output power of the power amplifier.

Description

Technical Field

[0001] This application relates to the field of power amplifier technology, and more particularly to a 5G communication system and a power amplifier based on predistortion millimeter-wave broadband. Background Technology

[0002] With the rapid development of the communications industry, the fifth-generation radio standard has emerged, and 5G frequency bands have been put into use in China. 5G frequency bands are divided into sub-6GHz bands and millimeter-wave bands. While China currently possesses strong core competitiveness in the sub-6GHz band, it remains relatively unfamiliar with the millimeter-wave band. To meet the requirements of supporting gigabits per second data rates and wide modulation bandwidth, the development of millimeter-wave frequency bands is urgently needed. Millimeter-wave technology will occupy a very important strategic position in the future development of communications.

[0003] Due to the increased data transmission rates, 5G communication systems tend to use more complex high-order modulation schemes, such as quadrature amplitude modulation (QAM) and orthogonal frequency division multiplexing (OFDM), which offer high peak-to-average power ratios. This modulation technique requires transmitters and power amplifiers in millimeter-wave 5G communication systems to possess exceptionally high linearity. However, there is an inherent conflict between high-linearity circuit design and high-efficiency operation. Therefore, efficient linear power amplifier design is crucial for modern wireless communication.

[0004] Existing power amplifiers suffer from inaccurate modeling of passive components, isolation between surrounding components, and nonlinearity issues caused by various parasitic effects. Summary of the Invention

[0005] This application provides a 5G communication system and a power amplifier based on predistortion millimeter-wave broadband to solve the technical problems of low linearity and low output power in existing power amplifiers used in 5G communication systems.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0007] A power amplifier based on predistortion millimeter-wave broadband includes an input matching module, a predistortion linearization module, an interstage matching module, a power amplification module, and an output matching module connected in sequence. The interstage matching module includes a single input port and dual output ports, and the output matching module includes dual input ports and a single output port. The predistortion linearization module includes a first switch, a fifth switch, and a fourth capacitor. The first terminal of the first switch is connected to the output terminal of the input matching module and the second terminal of the fifth switch, respectively. The fourth capacitor is connected to the second terminal of the first switch and the first terminal of the fifth switch, and the third terminal of the first switch is grounded. The fourth capacitor is used to provide a driving voltage to the second terminal of the first switch, using the driving voltage as a reverse driving signal to improve the gain compensation slope of the predistortion linearization module.

[0008] Preferably, a second resistor is connected in parallel to the second and third terminals of the fifth switch transistor. The second resistor is used to make the voltage at the second terminal of the fifth switch transistor equal to the voltage at the third terminal of the fifth switch transistor, so that the fifth switch transistor operates in the linear region.

[0009] Preferably, the pre-distortion linearization module includes a third capacitor for ensuring that the voltage at the third terminal of the fifth switch is normal, the first terminal of the third capacitor is connected to the third terminal of the fifth switch, and the second terminal of the third capacitor is grounded.

[0010] Preferably, the gain compensation value of the predistortion linearization module is the difference between the power at the first terminal of the first switch and the power of the source signal output by the input matching module.

[0011] Preferably, the power amplifier module includes a third switch and a fourth switch. The first end of the third switch is connected to the first port of the dual-output port in the inter-stage matching module, and the first end of the fourth switch is connected to the second port of the dual-output port in the inter-stage matching module. The third end of the third switch is connected to the third end of the fourth switch and then grounded. The second end of the third switch is connected to the first port of the dual-input port in the output matching module, and the second end of the fourth switch is connected to the second port of the dual-input port in the output matching module.

[0012] Preferably, the matching network of the interstage matching module includes a first transformer. The first end of the first transformer is connected to the output end of the predistortion linearization module. A ninth capacitor is connected between the first end of the first transformer and the output end of the predistortion linearization module. The first end of the first transformer serves as the single input port. The second end of the first transformer serves as the port providing a first DC bias power supply to the first ends of the first and fifth switching transistors. The third end of the first transformer is grounded. The fourth end of the first transformer serves as the first port of the dual output port. The sixth end of the first transformer serves as the second port of the dual output port. The fifth end of the first transformer serves as the port providing a second DC bias power supply to the first ends of the switching transistors in the power amplifier module. A fifth capacitor is connected in parallel to the fourth and sixth ends of the first transformer.

[0013] Preferably, the output matching module includes a second transformer, the first end of the second transformer serves as the first port of the dual input port, the third end of the second transformer serves as the second port of the dual input port, the dual input port is also connected in parallel with a sixth capacitor, the second end of the second transformer serves as the port for providing a third DC bias power supply to the second terminal of the switching transistor in the power amplifier module, the fifth end of the second transformer is grounded, and the fourth end of the second transformer is connected to the single output port.

[0014] Preferably, a seventh capacitor and an eighth capacitor are provided between the fourth terminal of the second transformer and the single output port. The seventh capacitor is connected to the fourth terminal of the second transformer and the first terminal of the eighth capacitor, respectively, and the second terminal of the eighth capacitor is connected to the single output port.

[0015] Preferably, the T-type matching network of the input matching module includes a first capacitor, a second capacitor, and a first inductor. The first terminal of the first capacitor is connected to the input terminal of the radio frequency signal. The second terminal of the first capacitor is connected to the first terminal of the second capacitor and the first terminal of the first inductor, respectively. The second terminal of the second capacitor is connected to the pre-distortion linearization module, and the second terminal of the first inductor is grounded.

[0016] This application also provides a 5G communication system, including the power amplifier based on predistortion millimeter-wave broadband described above.

[0017] As can be seen from the above technical solutions, the embodiments of this application have the following advantages: the 5G communication system and the power amplifier based on predistortion millimeter-wave broadband, the power amplifier based on predistortion millimeter-wave broadband includes an input matching module, a predistortion linearization module, an interstage matching module, a power amplification module and an output matching module connected in sequence, the interstage matching module includes a single input port and dual output ports, and the output matching module includes dual input ports and a single output port. This predistortion-based millimeter-wave broadband power amplifier avoids nonlinearity issues caused by inaccurate passive component modeling, isolation between surrounding components, and various parasitic effects through a predistortion linearization module. Furthermore, by using the predistortion linearization module as a single-ended gain source, it avoids phase imbalance issues caused by the differential structure of the power amplifier. By using the fourth capacitor in the predistortion linearization module as the power supply for the second terminal driving the first switch, the slope of the power amplifier's gain compensation curve is increased, enabling the power amplifier to adapt to performance degradation caused by energy-saving processes, thereby improving the linearity and output power of the power amplifier. Finally, by using inter-stage matching and output matching modules to broaden the bandwidth of the power amplifier, it solves the technical problems of low linearity and low output power in existing power amplifiers used in 5G communication systems. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the frame of the power amplifier based on predistortion millimeter-wave broadband described in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the circuit principle of the power amplifier based on predistortion millimeter-wave broadband described in the embodiments of this application;

[0021] Figure 3 This is a gain compensation curve of the predistortion linearization module in the power amplifier based on predistortion millimeter-wave broadband described in the embodiments of this application;

[0022] Figure 4 This is an equivalent diagram of the matching network for the interstage matching module of the power amplifier based on predistortion millimeter-wave broadband, as described in the embodiments of this application. Detailed Implementation

[0023] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] This application proposes a 5G communication system and a power amplifier based on predistortion millimeter-wave broadband, which solves the technical problems of low linearity and low output power in existing power amplifiers used in 5G communication systems. In this embodiment, all the switching transistors in the power amplifier based on predistortion millimeter-wave broadband can be selected as transistors such as bipolar junction transistors (BJTs), field-effect transistors (FETs), thyristors, or IGBTs. The first terminal of the switching transistor is the gate, the second terminal is the drain, and the third terminal is the source.

[0025] Example 1:

[0026] Figure 1 This is a schematic diagram of the framework of the power amplifier based on predistortion millimeter-wave broadband described in the embodiments of this application. Figure 2 This is a schematic diagram of the circuit principle of the power amplifier based on predistortion millimeter-wave broadband described in the embodiments of this application. Figure 3 This is a gain compensation curve of the predistortion linearization module in the power amplifier based on predistortion millimeter-wave broadband described in the embodiments of this application.

[0027] like Figure 1 and Figure 2 As shown, this application provides a power amplifier based on predistortion millimeter-wave broadband, including an input matching module 10, a predistortion linearization module 20, an interstage matching module 30, a power amplification module 40, and an output matching module 50 connected in sequence. The interstage matching module 30 includes a single input port and dual output ports, and the output matching module 50 includes dual input ports and a single output port. The predistortion linearization module 20 includes a first switch Q1, a fifth switch Q5, and a fourth capacitor C4. The first terminal of the first switch Q1 is connected to the output terminal of the input matching module 10 and the second terminal of the fifth switch Q5, respectively. The fourth capacitor C4 is connected to the second terminal of the first switch Q1 and the first terminal of the fifth switch Q5, and the third terminal of the first switch Q1 is grounded. The fourth capacitor C4 is used to provide a driving voltage to the second terminal of the first switch Q1, using the driving voltage as a reverse driving signal to improve the gain compensation slope of the predistortion linearization module.

[0028] It should be noted that the input RF signal is connected to the input terminal of the input matching module 10, the output terminal of the input matching module 10 is connected to the input terminal of the predistortion linearization module 20, the output terminal of the predistortion linearization module 20 is connected to the input terminal of the interstage matching module 30, the output terminal of the interstage matching module 30 is connected to the input terminal of the power amplification module 40, the output terminal of the power amplification module 40 is connected to the input terminal of the output matching module 50, and the output terminal of the output matching module 50 is connected to the load. The signal input through a single input port is a single-ended signal, and the signal output through a dual output port is a differential signal. In this embodiment, the first terminal of the first switch Q1 is also connected in series with a third resistor and connected to the first DC bias power supply provided by the interstage matching module, and the first terminal of the fifth switch Q5 is also connected in series with a first resistor and connected to the first DC bias power supply provided by the interstage matching module.

[0029] In this embodiment, the gain compensation value of the predistortion linearization module 20 is the difference between the power of the first terminal of the first switch and the power of the source signal output by the input matching module 10.

[0030] It should be noted that the source signal passes through the input matching module 10, the predistortion linearization module 20, and then enters the power amplification module 40. When the source signal is small, the fifth switch Q5 operates in the deep linear region, acting as an approximately constant low shunt resistor. As the power Pin of the source signal gradually increases, the fifth switch Q5 moves to the intermediate linear region, increasing its equivalent resistance value, eventually reaching the maximum value of the linear region. To design a predistortion linearization module 20 with effective compensation, given the power Pin of the source signal, the power at the gate of the first switch Q1 is set to PQ1G. The gain compensation value of the predistortion linearization module 20 is GLIN. Therefore, the gain compensation value can be calculated using GLIN = PQ1G - Pin. The gain compensation curve is shown below. Figure 3 As shown.

[0031] In this embodiment, the predistortion-based millimeter-wave broadband power amplifier avoids nonlinearity issues caused by inaccurate passive component modeling, isolation between surrounding components, and various parasitic effects through a predistortion linearization module. Furthermore, the predistortion linearization module provides gain at a single end, preventing phase imbalance issues caused by the differential structure of the power amplifier. Specifically, the fourth capacitor in the predistortion linearization module serves as the power supply for the second terminal of the first switch, thereby increasing the slope of the power amplifier's gain compensation curve and enabling the power amplifier to adapt to reduce performance degradation caused by process technology. The fourth capacitor also acts as a DC blocking element, preventing the DC bias signal from the inter-stage matching module from flowing into the first switch. The fourth capacitor in the predistortion linearization module reduces the layout area of ​​the power amplifier, and its high quality factor reduces power amplifier losses.

[0032] This application provides a predistortion millimeter-wave broadband power amplifier, comprising an input matching module, a predistortion linearization module, an interstage matching module, a power amplification module, and an output matching module connected in sequence. The interstage matching module includes a single input port and dual output ports, while the output matching module includes dual input ports and a single output port. This predistortion millimeter-wave broadband power amplifier, through the predistortion linearization module, avoids nonlinearity problems caused by inaccurate modeling of passive components, isolation between surrounding components, and various parasitic effects. By using the predistortion linearization module to provide gain to the power amplification module, it avoids the phase imbalance problem caused by the differential structure of the power amplifier. By using the fourth capacitor in the predistortion linearization module as the power supply to drive the second terminal of the first switching transistor, the slope of the power amplifier's gain compensation curve is increased, enabling the power amplifier to adapt to performance degradation caused by energy-saving processes, thereby improving the linearity and output power of the power amplifier. Furthermore, the interstage matching module and output matching module broaden the bandwidth of the power amplifier, solving the technical problems of low linearity and low output power in existing power amplifiers used in 5G communication systems.

[0033] like Figure 2 As shown, in one embodiment of this application, the predistortion linearization module 20 includes a third capacitor C3 for ensuring that the voltage at the third terminal of the fifth switch Q5 is normal. The first terminal of the third capacitor C3 is connected to the third terminal of the fifth switch Q5, and the second terminal of the third capacitor C3 is grounded. A second resistor R2 is connected in parallel across the second and third terminals of the fifth switch Q5. The second resistor R2 is used to make the voltage at the second terminal of the fifth switch Q5 equal to the voltage at the third terminal of the fifth switch Q5, so that the fifth switch Q5 operates in the linear region.

[0034] It should be noted that in the predistortion linearization module 20, the voltage at the second terminal of the fifth switch Q5 is kept consistent with the voltage at its third terminal to ensure that the fifth switch Q5 operates in the linear region; the second resistor R2 ensures that the voltage at the second terminal of the fifth switch Q5 is equal to the voltage at its third terminal, and avoids adding an additional DC bias to the third terminal of the fifth switch Q5 to guarantee the voltage value. A third capacitor C3 is connected in series at the third terminal of the fifth switch Q5 to create an AC path, ensuring that the voltage at the third terminal of the fifth switch Q5 has a normal swing. In this embodiment, as... Figure 2 As shown, the drain of the fifth switch Q5 is connected to the gate of the first switch Q1. The source of the fifth switch Q5 is connected to the second resistor R2 and the third capacitor C3. The other end of the third capacitor C3 is grounded, and the other end of the second resistor R2 is connected to the drain of the fifth switch Q5. The gate of the fifth switch Q5 is connected to the first resistor R1 and the fifth capacitor C4. The other end of the fourth capacitor C4 is connected to the drain of the first switch Q1. The other end of the first resistor R1 is connected to the DC bias VG2, which provides the first DC bias power supply to the gate of the fifth switch Q5. The gate of the first switch Q1 is connected to the third resistor R3, and the other end of the third resistor R3 is connected to the DC bias VG1, which provides the first DC bias power supply to the gate of the first switch Q1.

[0035] like Figure 2 As shown, in one embodiment of this application, the power amplifier module 40 includes a third switch Q3 and a fourth switch Q4. The first end of the third switch Q3 is connected to the first port of the dual output port in the interstage matching module 30, and the first end of the fourth switch Q4 is connected to the second port of the dual output port in the interstage matching module 30. The third end of the third switch Q3 is connected to the third end of the fourth switch Q4 and then grounded. The second end of the third switch Q3 is connected to the first port of the dual input port in the output matching module 50, and the second end of the fourth switch Q4 is connected to the second port of the dual input port in the output matching module 50.

[0036] It should be noted that the differential signals output from the dual output ports of the interstage matching module are connected to the gates of the third switch Q3 and the fourth switch Q4, respectively. The sources of the third switch Q3 and the fourth switch Q4 are connected and then grounded. The drains of the third switch Q3 and the fourth switch Q4 output differential signals, which are then connected to the dual input ports of the output matching module. The second terminal k of the transformer of the output matching module 50 serves as the DC bias VD2 providing the third DC bias power supply, providing DC bias VD2 to the drains of the third switch Q3 and the fourth switch Q4. The power amplification module 40 of this predistorted millimeter-wave broadband power amplifier adopts a differential structure. The differential structure of the power amplification module 40 has a common-mode signal suppression effect. Ideally, the common-mode output of the power amplification module 40 is zero, which can better suppress unnecessary noise and interference from various environments, thereby improving the linearity of the predistorted millimeter-wave broadband power amplifier. The differential power amplifier module 40 allows the source stages of the third switch Q3 and the fourth switch Q4 to be connected together. From the perspective of AC signal analysis, the source stages of the third switch Q3 and the fourth switch Q4 will have an ideal AC ground, which alleviates the problem of gain reduction caused by the source stage wiring process and parasitic effects of the third switch Q3 and the fourth switch Q4.

[0037] like Figure 2 As shown, in one embodiment of this application, the matching network of the interstage matching module 30 includes a first transformer T1. The first terminal A of the first transformer T1 is connected to the output terminal of the predistortion linearization module 20. A ninth capacitor C9 is connected between the first terminal A of the first transformer T1 and the output terminal of the predistortion linearization module 20. The first terminal A of the first transformer T1 serves as a single input port. The second terminal E of the first transformer T1 serves as a port providing a first DC bias power supply to the first terminals of the first switch Q1 and the fifth switch Q3. The third terminal B of the first transformer T1 is grounded. The fourth terminal C of the first transformer T1 serves as the first port of the dual output port. The sixth terminal D of the first transformer T1 serves as the second port of the dual output port. The fifth terminal F of the first transformer T1 serves as a port providing a second DC bias power supply to the first terminals of the switches in the power amplifier module 40. The second DC bias power supply is used to provide power to the first terminals of the third switch Q3 and the sixth switch Q6 of the power amplifier module 40. A fifth capacitor C5 is connected in parallel on the fourth terminal C and the sixth terminal D of the first transformer T1.

[0038] It should be noted that the output of the predistortion linearization module 20 is connected to the first terminal A of the first transformer T1 via a parallel ninth capacitor C9, while the third terminal B of the first transformer T1 is grounded. The second terminal E of the center tap of the first transformer T1 provides a DC bias VD1 to the gates of the first switch Q1 and the second switch Q2 of the predistortion linearization module 20, and the fifth terminal F of the first transformer T1 provides a DC bias VG3 to the gates of the third switch Q3 and the fourth switch Q4 of the power amplifier module 40. The signals are converted from single-input signals to differential signals through the omega capacitor of the first transformer T1 and output from the fourth terminal C and the sixth terminal D, respectively. The differential signals are output to the power amplifier module 40 via the fifth capacitor C5.

[0039] Figure 4 This is an equivalent diagram of the matching network for the interstage matching module of the power amplifier based on predistortion millimeter-wave broadband, as described in the embodiments of this application.

[0040] In this embodiment, the actual structure of the first transformer T1 is a primary coil and a secondary coil coupled together, and the equivalent circuit is as follows: Figure 4 As shown, Lm is the mutual inductance of the two coils coupled together, Lp is the self-inductance of the primary coil minus the mutual inductance, and Ls is the self-inductance of the secondary coil minus the mutual inductance. When the self-inductances of the two coils are inconsistent, one of Lp and Ls may be negative. A negative inductance is equivalent to a capacitor. Therefore, different first transformers can form different matching networks, which can replace the traditional capacitor-inductor matching method. The interstage matching module 30, which uses the first transformer for matching, also solves the problem of narrow-band interstage matching, making broadband matching of this power amplifier based on predistortion millimeter-wave broadband possible.

[0041] like Figure 2 As shown, in one embodiment of this application, the T-type matching network of the input matching module 10 includes a first capacitor C1, a second capacitor C2, and a first inductor L1. The first end of the first capacitor C1 is connected to the input terminal RFIN of the radio frequency signal. The second end of the first capacitor C1 is connected to the first end of the second capacitor C2 and the first end of the first inductor L1, respectively. The second end of the second capacitor C2 is connected to the input terminal of the predistortion linearization module 20. The second end of the first inductor L1 is grounded.

[0042] It should be noted that the signal output from the second terminal of the second capacitor C2 is sent to the drive amplifier module 20. The input matching module 10 uses a T-type matching network to reduce the bounce of the input RFIN radio frequency signal. The first capacitor C1 of the input matching module 10 participates in matching and acts as a DC blocking agent. The input matching module 10 can also match a suitable input impedance for this power amplifier based on predistortion millimeter-wave broadband.

[0043] like Figure 2As shown, in one embodiment of this application, the output matching module 50 includes a second transformer T2. The first terminal G of the second transformer T2 serves as the first port of the dual-input port, and the third terminal H of the second transformer T2 serves as the second port of the dual-input port. The dual-input port is also connected in parallel with a sixth capacitor C6. The second terminal K of the second transformer T2 serves as the port for the third DC bias power supply provided by the second terminal of the switching transistor in the power amplifier module 40. The fifth terminal J of the second transformer T1 is grounded, and the fourth terminal I of the second transformer T2 is connected to a single output port. A seventh capacitor C7 and an eighth capacitor C8 are disposed between the fourth terminal I of the second transformer T2 and the single output port. The seventh capacitor C7 is connected to the fourth terminal I of the second transformer T2 and the first terminal of the eighth capacitor C8, respectively. The second terminal of the eighth capacitor C8 is connected to the single output port RFOUT.

[0044] It should be noted that the amplified signal output from the power amplifier module 40 is connected to the first terminal G and the third terminal H of the second transformer T2 via a parallel sixth capacitor C6. The second terminal K of the second transformer T2 provides a DC bias VD2 to the drains of the switching transistors Q3 and Q4 of the power amplifier module 40. The amplified signal is converted from a differential dual-ended signal to a single-ended signal via the second transformer T2 and output from the fourth terminal I of the second transformer T2. The fifth terminal J of the second transformer T2 is grounded. The communication signal output from the second transformer T2 is connected to the eighth capacitor C8 via a parallel seventh capacitor C7 and finally output from the single output port RFOUT. In this embodiment, the principle and advantages of the output matching module are the same as those of the inter-stage matching module. Since the power amplifier module needs larger transistors to output greater power and has a smaller optimal load impedance, the transformer can not only act as a matching network but also perform impedance transformation. Therefore, the output matching module uses a second transformer with a turns ratio of 1:2, which converts the 50-ohm single output port RFOUT to the optimal load impedance RL of the switching transistors in the power amplifier module, thereby improving the output power. The power amplifier based on predistortion millimeter-wave broadband increases the output power through the power amplification module 40, and reduces the loss of output power by using the second transformer of the output matching module to successfully output the power.

[0045] Example 2:

[0046] This application also provides a 5G communication system, including the aforementioned power amplifier based on predistortion millimeter-wave broadband.

[0047] It should be noted that the content of the power amplifier based on predistortion millimeter-wave broadband in Embodiment 2 has already been described in Embodiment 1, and the content of the power amplifier based on predistortion millimeter-wave broadband will not be described again in Embodiment 2.

[0048] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0049] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0050] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0051] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0052] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0053] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A power amplifier based on predistortion millimeter-wave broadband, characterized in that, The system comprises an input matching module, a predistortion linearization module, an interstage matching module, a power amplification module, and an output matching module connected in sequence. The interstage matching module includes a single input port and dual output ports, and the output matching module includes dual input ports and a single output port. The predistortion linearization module includes a first switch, a fifth switch, and a fourth capacitor. The first terminal of the first switch is connected to the output terminal of the input matching module and the second terminal of the fifth switch, respectively. The fourth capacitor is connected to the second terminal of the first switch and the first terminal of the fifth switch, and the third terminal of the first switch is grounded. The fourth capacitor provides a driving voltage to the second terminal of the first switch, which serves as a reverse driving signal to improve the gain compensation slope of the predistortion linearization module. A second resistor is connected in parallel to the second and third terminals of the fifth switch. The second resistor is used to make the voltage at the second terminal of the fifth switch equal to the voltage at the third terminal of the fifth switch, so that the fifth switch can operate in the linear region. The pre-distortion linearization module includes a third capacitor for ensuring that the third terminal voltage of the fifth switch is normal. The first terminal of the third capacitor is connected to the third terminal of the fifth switch, and the second terminal of the third capacitor is grounded. The gain compensation value of the predistortion linearization module is the difference between the power of the first terminal of the first switch and the power of the source signal output by the input matching module. Wherein, the gain compensation slope is the slope of the tangent line at a certain point on the gain compensation curve, and the gain compensation curve is a curve constructed by taking the power of the source signal output by the input matching module as the horizontal axis and the gain compensation value as the vertical axis.

2. The power amplifier based on predistortion millimeter-wave broadband according to claim 1, characterized in that, The power amplifier module includes a third switch and a fourth switch. The first end of the third switch is connected to the first port of the dual-output port in the inter-stage matching module. The first end of the fourth switch is connected to the second port of the dual-output port in the inter-stage matching module. The third end of the third switch is connected to the third end of the fourth switch and then grounded. The second end of the third switch is connected to the first port of the dual-input port in the output matching module. The second end of the fourth switch is connected to the second port of the dual-input port in the output matching module.

3. The power amplifier based on predistortion millimeter-wave broadband according to claim 1, characterized in that, The matching network of the interstage matching module includes a first transformer. The first end of the first transformer is connected to the output end of the predistortion linearization module. Both the first end of the first transformer and the output end of the predistortion linearization module are connected to the first end of a ninth capacitor. The second end of the ninth capacitor is grounded. The first end of the first transformer serves as the single input port. The second end of the first transformer serves as a port that provides a first DC bias power supply to the first ends of the first and fifth switching transistors. The third end of the first transformer is grounded. The fourth end of the first transformer serves as the first port of the dual output port. The sixth end of the first transformer serves as the second port of the dual output port. The fifth end of the first transformer serves as a port that provides a second DC bias power supply to the first ends of the switching transistors in the power amplifier module. A fifth capacitor is connected in parallel to the fourth and sixth ends of the first transformer.

4. The power amplifier based on predistortion millimeter-wave broadband according to claim 1, characterized in that, The output matching module includes a second transformer. The first end of the second transformer serves as the first port of the dual input port, the third end of the second transformer serves as the second port of the dual input port, the dual input port is also connected in parallel with a sixth capacitor, the second end of the second transformer serves as the port for providing a third DC bias power supply to the second terminal of the switching transistor in the power amplifier module, the fifth end of the second transformer is grounded, and the fourth end of the second transformer is connected to the single output port.

5. The power amplifier based on predistortion millimeter-wave broadband according to claim 4, characterized in that, A seventh capacitor and an eighth capacitor are provided between the fourth terminal of the second transformer and the single output port. The seventh capacitor is connected to the fourth terminal of the second transformer and the first terminal of the eighth capacitor, respectively, and the second terminal of the eighth capacitor is connected to the single output port.

6. The power amplifier based on predistortion millimeter-wave broadband according to claim 1, characterized in that, The T-type matching network of the input matching module includes a first capacitor, a second capacitor, and a first inductor. The first terminal of the first capacitor is connected to the input terminal of the radio frequency signal. The second terminal of the first capacitor is connected to the first terminal of the second capacitor and the first terminal of the first inductor, respectively. The second terminal of the second capacitor is connected to the pre-distortion linearization module. The second terminal of the first inductor is grounded.

7. A 5G communication system, characterized in that, Includes the power amplifier based on predistortion millimeter-wave broadband as described in any one of claims 1-6.

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