Power amplification module and satellite communication equipment

Abstract

The invention provides a power amplification module and satellite communication equipment, relates to the field of satellite communication, and solves the problem that stable work of a communication system cannot be guaranteed due to the fact that the gain of a power amplifier during large signal power output and the gain of the power amplifier during small signal power output in the prior art are greatly fluctuated. According to the power amplification module of the scheme, the two-channel detection unit is arranged, so that a hardware closed loop is realized in a link, the signal levels corresponding to the input signal and the output signal are acquired through the two-channel detection unit, and the attenuation amount of the attenuation unit is adjusted, so that the hardware closed loop is realized to dynamically adjust the link gain; therefore, the link gain is kept stable, and the satellite communication quality can be improved.

Description

Technical Field

[0001] This application relates to the field of satellite communication technology, and in particular to a power amplifier module and satellite communication equipment. Background Technology

[0002] In satellite communication systems, gallium nitride (GaN) power amplifiers are typically used in the final stage power amplifiers and driver power amplifiers of satellite communication equipment (such as transmitters and transceivers). However, this type of amplifier exhibits significant link gain fluctuations under different power output conditions; for example, the gain is high at low signal power outputs but relatively low at high signal power outputs. Furthermore, when the driver power amplifier and the final stage power amplifier are cascaded, the link gain fluctuations are even greater in response to changes in signal power output.

[0003] For example, in multi-carrier applications, a communication system initially operates with a small-signal carrier, and then a large-signal carrier is added. At this point, because the gain of the gallium nitride power amplifier decreases when outputting the large signal power, the sharp drop in gain in the small-signal carrier link can severely impact signal quality, link budget, system stability, and equipment reliability, even causing the communication system to malfunction. In response, the power amplifiers provided by related technologies exhibit large gain fluctuations, failing to guarantee stable operation of the communication system. Summary of the Invention

[0004] This application provides a power amplifier module and satellite communication equipment, which solves the problem in related technologies that the gain of power amplifiers fluctuates greatly when the signal power is high compared with the gain when the signal power is low, thus failing to ensure the stable operation of the communication system. The power amplifier module provided by this solution can form a hardware closed loop to achieve automatic gain stabilization, effectively ensuring the stable operation of the satellite communication system.

[0005] In a first aspect, this application provides a power amplifier module, comprising a power drive unit, an attenuation unit, a power amplification unit, and a dual-channel detection unit. The first input terminal of the dual-channel detection unit is connected to the sampling terminal of the power drive unit, the second input terminal of the dual-channel detection unit is connected to the sampling terminal of the power amplification unit, and the output terminal of the dual-channel detection unit is connected to the controlled terminal of the attenuation unit. The dual-channel detection unit is used to adjust a generated control signal based on a first signal level acquired from the power drive unit and a second signal level acquired from the power amplification unit. The input terminal of the power drive unit is used to receive a radio frequency (RF) signal, and the output terminal of the power drive unit is connected to the input terminal of the attenuation unit. The output terminal of the attenuation unit is connected to the input terminal of the power amplification unit. The power drive unit is also used to filter and amplify the RF signal, and the attenuation unit is used to adjust the attenuation amount according to the control signal to control the link gain.

[0006] Secondly, this application also provides a satellite communication device, which includes the power amplifier module provided in the first aspect above.

[0007] The power amplifier module of this application achieves hardware closed-loop in the link by setting up a dual-channel detection unit. The dual-channel detection unit collects the signal levels corresponding to the input and output signals and adjusts the attenuation of the attenuation unit, thereby realizing hardware closed-loop to dynamically adjust the link gain, so that the link gain remains stable, which helps to improve the quality of satellite communication. Attached Figure Description

[0008] Figure 1 This is a schematic block diagram of a power amplifier module provided in one embodiment of this application.

[0009] Figure 2 This is a schematic diagram of the circuit structure of an integrator unit provided in an embodiment of this application.

[0010] Figure 3 This is a schematic diagram of the structure of a power amplifier module provided in an embodiment of this application.

[0011] Figure 4 This is a block diagram of a gain test provided in one embodiment of this application. Detailed Implementation

[0012] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of this application and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, the accompanying drawings only show the parts related to the embodiments of this application, not all structures. Those skilled in the art, after reading this specification, should be able to conceive that any combination of technical features can constitute an optional implementation method, provided that the technical features do not contradict each other.

[0013] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects, not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship. In the description of this application, "multiple" means two or more, and "several" means one or more.

[0014] In satellite communication systems, power amplifiers such as the final stage power amplifier and the driver power amplifier typically use gallium nitride (GaN) power amplifiers. However, this type of amplifier exhibits significant link gain fluctuations under different power output conditions; that is, the gain is high at low signal power outputs but relatively low at high signal power outputs, reaching 5 to 10 dB. In this case, when the driver power amplifier and the final stage amplifier are cascaded, the link gain fluctuations are even greater in response to changes in signal power output.

[0015] In multi-carrier applications, a communication system initially operates with a small-signal carrier, followed by the addition of a large-signal carrier. However, the gain of the gallium nitride (GaN) power amplifier decreases significantly at high-signal power output. This sharp drop in gain in the small-signal carrier link severely impacts signal quality, link budget, system stability, and equipment reliability. For example, it can cause modulation distortion, deterioration of the bit error rate, and multi-carrier intermodulation distortion, affecting signal quality and even impacting EIRP (Equivalent Isotropic Radiated Power) stability, leading to multiple access interference and ultimately rendering the communication system inoperable. Therefore, the gain of power amplifiers provided by related technologies fluctuates greatly between small-signal power output and large-signal power output, failing to guarantee stable operation of the communication system.

[0016] In response, this application provides a power amplifier module that achieves automatic gain stabilization based on hardware closed-loop, which can stabilize the link gain under both high-signal-power output and low-signal-power output conditions, thereby enabling the communication system to operate stably. Figure 1 The schematic diagram of a power amplifier module provided in an embodiment of this application is shown in the figure. The power amplifier module includes a power drive unit 110, an attenuation unit 120, a power amplification unit 130, and a dual-channel detection unit 140.

[0017] The dual-channel detection unit 140 has its first input terminal connected to the sampling terminal of the power drive unit 110, its second input terminal connected to the sampling terminal of the power amplifier unit 130, and its output terminal connected to the controlled terminal of the attenuation unit 120. The dual-channel detection unit 140 generates a control signal based on the first signal level acquired from the power drive unit 110 and the second signal level acquired from the power amplifier unit 130. Specifically, the dual-channel detection unit 140 detects the input and output signals to acquire the first and second signal levels, processes these acquired levels to generate a corresponding control signal, and then adjusts the attenuation unit 120 using this control signal.

[0018] Furthermore, the input terminal of the power drive unit 110 is used to receive radio frequency signals, and the output terminal of the power drive unit 110 is connected to the input terminal of the attenuation unit 120. The output terminal of the attenuation unit 120 is connected to the input terminal of the power amplifier unit 130. The power drive unit 110 is also used to filter and amplify the radio frequency signals, and the attenuation unit 120 is used to adjust the attenuation amount according to the control signal to control the link gain. It can be imagined that the power drive unit 110, the attenuation unit 120, and the power amplifier unit 130 can amplify, filter, and perform other signal processing on the received signals to generate corresponding output signals. After the dual-channel detector unit 140 outputs a control signal, the attenuation unit 120 adjusts the attenuation amount according to the control signal to control the link gain, so that the output signal can meet the requirements.

[0019] As can be seen from the above scheme, the power amplifier module of this scheme acquires the signal levels corresponding to the input and output signals through a dual-channel detection unit, and adjusts the attenuation of the attenuation unit, thereby realizing a hardware closed loop to dynamically adjust the link gain and keep the link gain stable.

[0020] In one embodiment, the dual-channel detection unit includes a first detection unit, a second detection unit, and an integrator unit. Specifically, the input terminal of the first detection unit serves as the first input terminal of the dual-channel detection unit, and the input terminal of the first detection unit is connected to the sampling terminal of the power drive unit. The output terminal of the first detection unit is connected to the first input terminal of the integrator unit. The input terminal of the second detection unit serves as the second input terminal of the dual-channel detection unit, and the input terminal of the second detection unit is connected to the sampling terminal of the power amplifier unit. The output terminal of the second detection unit is connected to the second input terminal of the integrator unit, and the output terminal of the integrator unit is connected to the controlled terminal of the attenuation unit.

[0021] Understandably, the first detection unit samples the first signal level and generates a first detection voltage. This first detection voltage decreases as the first signal level increases; that is, the higher the first signal level sampled by the first detection unit, the lower its output first detection voltage. Similarly, the second detection unit samples the second signal level and generates a second detection voltage. This second detection voltage also decreases as the second signal level increases; that is, the higher the second signal level sampled by the second detection unit, the lower its output second detection voltage. The integrator unit adjusts the voltage value of the generated control signal based on the first and second detection voltages. After the two detection voltages enter the integrator unit, the control signal output by the integrator unit is a voltage signal. This voltage value controls the attenuation amount of the attenuation unit, thereby controlling the link gain.

[0022] It should be noted that, in some embodiments, the dual-channel detection unit can use a dual-channel detection chip to acquire the detection voltages corresponding to the input and output signals, and provide corresponding control signals to the attenuation unit.

[0023] Optionally, Figure 2 The circuit structure diagram of an integrator unit provided in an embodiment of this application is shown in the figure. The integrator unit includes an operational amplifier OPA, a first resistor R1, a second resistor R2, a third resistor R3, and a first capacitor C1. Specifically, the non-inverting input terminal of the operational amplifier OPA is connected to the output terminal of the second detector unit through the first resistor R1, the inverting input terminal of the operational amplifier OPA is connected to the output terminal of the first detector unit through the second resistor R2, the first end of the third resistor R3 is connected to the inverting input terminal of the operational amplifier OPA, the second end of the third resistor R3 is connected to the first end of the first capacitor C1, and the second end of the first capacitor C1 is connected to the output terminal of the operational amplifier OPA.

[0024] It is understandable that, taking the voltage connected to the operational amplifier OPA through the first resistor R1 as voltage Vin1 and the voltage connected to the operational amplifier OPA through the second resistor R2 as voltage Vin2, if voltage Vin2 is less than voltage Vin1, current will flow from the output of the operational amplifier OPA through the first capacitor C1 and the third resistor R3 back to the input. This increases the voltage at the output of the operational amplifier OPA, meaning the control signal output by the integrator unit increases, and consequently the attenuation of the attenuation unit decreases, thus increasing the output power of the output signal. Similarly, if voltage Vin2 is greater than voltage Vin1, current will flow through the first capacitor C1 and the third resistor R3 to the output, decreasing the voltage at the output of the operational amplifier OPA. This decreases the control signal output by the integrator unit, and consequently the attenuation of the attenuation unit increases, thus decreasing the output power of the output signal. Therefore, this scheme, through the integrator unit, can generate corresponding control signals after detecting the input and output signals to control the gain changes of the link, thereby effectively stabilizing the link gain.

[0025] Optionally, the first and second detection units include a detector, a fourth resistor, a second capacitor, and a third capacitor. Specifically, the first input terminal of the detector is connected to the first terminal of the second capacitor, the second terminal of the second capacitor is grounded, the second input terminal of the detector is connected to the first terminal of the third capacitor, the second terminal of the third capacitor is connected to the first terminal of the fourth resistor, the second terminal of the fourth resistor is connected to the second terminal of the second capacitor, and the second input terminal of the detector is connected to the sampling terminal of the power drive unit or the sampling terminal of the power amplification unit through the third capacitor. It should be noted that in some embodiments, the detectors included in the first and second detection units are logarithmic detectors. It is understood that the first and second detection units output corresponding detection voltages by detecting the input signal; the lower the signal level, the larger the output detection voltage, and the higher the signal level, the smaller the output detection voltage.

[0026] In one embodiment, the second detection unit further includes a first variable attenuator. The input of the first variable attenuator is connected to the sampling terminal of the power amplifier unit, and the output of the first variable attenuator is connected to the second terminal of the third capacitor in the second detection unit. Therefore, the output signal can be attenuated by the first variable attenuator before detection, facilitating the adjustment of the link gain. It is conceivable that the attenuation provided by the first variable attenuator functions identically to a preset gain value, thereby generating a corresponding second detection voltage. When the second detection voltage is equal to the generated first detection voltage, it can be determined that the link gain remains at the preset gain value; when the second detection voltage is not equal to the first detection voltage, it can be determined that the link gain has changed. In this case, the attenuation in the link can be adjusted by the integrator unit, thereby stabilizing the link gain.

[0027] In one embodiment, the power drive unit includes an isolator, a second variable attenuator, a first power amplifier, a coupler, an equalizer, and a first bandpass filter. Specifically, the input of the isolator is used to receive the radio frequency signal; the output of the isolator is connected to the input of the second variable attenuator; the output of the second variable attenuator is connected to the input of the first power amplifier; the output of the first power amplifier is connected to the input of the coupler; the first output of the coupler is connected to the input of the equalizer; the second output of the coupler serves as the sampling terminal of the power drive unit and is connected to the first input of the dual-channel detection unit; the output of the equalizer is connected to the input of the first bandpass filter; and the output of the first bandpass filter is connected to the input of the attenuation unit. It is conceivable that after the input signal is reduced by the isolator and attenuated by the second variable attenuator, it is then amplified by the first power amplifier. The coupler splits the signal into two paths: one path is connected to the dual-channel detection unit, and the other path is connected to the equalizer to adjust the attenuation of each frequency component of the electrical signal, and then the signal is filtered by the first bandpass filter.

[0028] Optionally, the attenuation unit includes a third variable attenuator. The input of the third variable attenuator is connected to the output of the power drive unit, the output of the third variable attenuator is connected to the input of the power amplifier unit, and the control terminal of the third variable attenuator is connected to the output of the dual-channel detector unit. The third variable attenuator is used to receive a control signal and adjust the attenuation according to the control signal. It is conceivable that after the third variable attenuator receives the control signal through the control terminal, the attenuation of the third variable attenuator changes with the change of the control signal. For example, when the control signal increases, the attenuation of the third variable attenuator decreases, thereby increasing the power of the RF output signal. To address this, this solution constructs a hardware closed loop to adjust the attenuation of the variable attenuator, thereby stabilizing the link gain.

[0029] In one embodiment, the power amplification unit includes a second power amplifier, a second bandpass filter, a third power amplifier, and a high-power amplifier. Specifically, the input terminal of the second power amplifier is connected to the output terminal of the attenuation unit, the output terminal of the second power amplifier is connected to the input terminal of the second bandpass filter, the output terminal of the second bandpass filter is connected to the input terminal of the third power amplifier, and the output terminal of the third power amplifier is connected to the input terminal of the high-power amplifier, which amplifies the signal. It can be understood that after receiving the attenuated signal from the attenuation unit, the second power amplifier amplifies it, then filters it using the second bandpass filter, and then sequentially amplifies it using the third power amplifier and the high-power amplifier, so that the output signal power reaches a preset power.

[0030] Figure 3 This is a schematic diagram of the structure of a power amplifier module provided in one embodiment of the present application. In one embodiment, the structure of the power amplifier module is as follows: Figure 3As shown, after receiving the input signal, the power amplifier module reduces the reflection of the input signal through an isolator before inputting it to the second variable attenuator ATT2. After attenuation by the second variable attenuator ATT2, it is connected to the first power amplifier PA1 for power amplification. Then, the signal is split into two paths by a coupler Coupler1. One path is connected to the detector Log_B through capacitor C5, and the other path is connected to the equalizer EQ to adjust the attenuation of each frequency component of the electrical signal. This is then connected to the first bandpass filter FL1 for signal filtering. The third variable attenuator ATT3 is connected to the first bandpass filter FL1 to filter the signal before it is transmitted to the second power amplifier PA2. The control terminal of the third variable attenuator ATT3 is connected to the output terminal of the operational amplifier OPA in the integrator unit to receive corresponding control signals to control the attenuation of the third variable attenuator ATT3. The signal from the output of the third variable attenuator ATT3 is amplified by the second power amplifier PA2, then filtered by the second bandpass filter FL2, and then amplified by the third power amplifier PA3 and the high power amplifier HPA in sequence, so that the power of the output signal reaches the preset power.

[0031] A coupler (Couple2) can be installed at the output of the high-power amplifier (HPA) to transmit the output signal to the first variable attenuator (ATT1). The first variable attenuator (ATT1) receives the output signal, attenuates it, and then transmits it to the detector (Log_A) through capacitor C3. Detectors Log_A and Log_B receive the corresponding signal levels and generate corresponding detection voltages. Then, based on the operational amplifier (OPA), an integrator unit is constructed to calculate the two detection voltages and output corresponding control signals to control the attenuation of the third variable attenuator (ATT3), thereby adjusting the link gain and stabilizing it.

[0032] For example, Figure 4 As shown in the figure, a gain test block diagram is provided for an embodiment of this application. The host computer 210 is connected to the signal source 220 to control the signal source 220 to output signals with different powers. The host computer 210 is also connected to the power meter 240 to obtain the power of the output signal. The satellite communication device 230 is provided with the above-mentioned power amplification module. The satellite communication device 230 is connected to the signal source 220 and the power meter 240, thereby receiving the input signal and generating the output signal after power amplification and filtering.

[0033] Before testing, the small signal input level can be fixed, and the control voltage of the first variable attenuator can be adjusted to ensure that the output power of the satellite communication equipment reaches the desired power. For example, with an RF input power of -45dBm and an RF output power of 25dBm, the gain of the satellite communication equipment is the RF output power minus the RF input power, i.e., gain G = 25dBm - (-45dBm) = 70dB. Therefore, the link gain can be fixed before testing. After the satellite communication equipment achieves gain stabilization based on a hardware closed loop using the power amplifier module, when the RF input power is -45dBm, the coupling power Pin of its input signal is input to the detector Log_B, and the detection voltage of the input signal is Vin2. Since the control voltage of the first adjustable attenuator ATT1 is adjusted to make the power of the RF output signal 25dBm, the coupling power Pout of the output signal is input to the detector Log_A through the first adjustable attenuator ATT1. At this time, the detection voltage Vin1 of the output signal is equal to the detection voltage Vin2 of the input signal.

[0034] However, when the input signal level increases, such as to -15dBm, the gain becomes relatively smaller due to link gain fluctuations, i.e., smaller than 70dB, such as decreasing to 65dB. When the input signal power increases to -15dBm, and due to link gain compression, the output signal power decreases (e.g., to 50dBm). In response, the detection voltage Vin2 obtained by the input signal corresponding to detector Log_B is less than the detection voltage Vin1 obtained by the output signal corresponding to detector Log_A. Consequently, after the two detection voltages pass through the integrator unit based on operational amplifier OPA, the control signal voltage output by operational amplifier OPA continuously increases, thereby reducing the attenuation of the third variable attenuation unit ATT3. This leads to a continuous increase in the RF output power of the output signal, and the increase in RF output power causes a decrease in detection voltage Vin1. It can be imagined that through this hardware closed-loop circuit, the detection voltage Vin1, the attenuation of the third variable attenuation unit ATT3, and the RF output power of the output signal are all dynamically changing until the detection voltage Vin1 equals the detection voltage Vin2, ultimately achieving a dynamic balance, resulting in an RF output power of 55dBm and a link gain of 70dB.

[0035] This application also provides a satellite communication device, which includes the power amplifier module provided in the above embodiments. This satellite communication device can be a transmitter, transceiver, etc. The satellite communication device of this solution can maintain stable link gain in response to changes in input signals, resulting in smaller gain fluctuations and effectively improving satellite communication quality. Therefore, based on... Figure 4The test system shown was used to test different input signals. It was also compared with related technologies using hardware open-loop designs (such as device A in the table) and the satellite communication equipment of this solution (such as device B in the table). The comparison results are shown in the table below:

[0036]

[0037] Therefore, compared with related technologies, the satellite communication equipment in this solution can detect the magnitude of the input signal and adjust the link gain in real time through hardware closed loop and negative feedback mechanism, thereby maintaining the stability of the link gain and helping to improve the quality of satellite communication.

[0038] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0039] Note that the above description is merely a preferred embodiment and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of this application, and the scope of this application is determined by the scope of the appended claims.

Claims

1. A power amplifier module, characterized in that, It includes a power drive unit, an attenuation unit, a power amplification unit, and a dual-channel detection unit; The first input terminal of the dual-channel detector unit is connected to the sampling terminal of the power drive unit, the second input terminal of the dual-channel detector unit is connected to the sampling terminal of the power amplifier unit, and the output terminal of the dual-channel detector unit is connected to the controlled terminal of the attenuation unit. The dual-channel detector unit is used to generate a control signal based on the first signal level acquired from the power drive unit and the second signal level acquired from the power amplifier unit. The input terminal of the power drive unit is used to receive radio frequency signals, the output terminal of the power drive unit is connected to the input terminal of the attenuation unit, the output terminal of the attenuation unit is connected to the input terminal of the power amplifier unit, the power drive unit is also used to filter and amplify the radio frequency signals, and the attenuation unit is used to adjust the attenuation amount according to the control signal to control the link gain.

2. The power amplifier module according to claim 1, characterized in that, The dual-channel detection unit includes a first detection unit, a second detection unit, and an integrator unit; The input terminal of the first detection unit serves as the first input terminal of the dual-channel detection unit. The input terminal of the first detection unit is connected to the sampling terminal of the power drive unit. The output terminal of the first detection unit is connected to the first input terminal of the integrator unit. The first detection unit is used to sample the first signal level and generate a first detection voltage. The first detection voltage decreases as the first signal level increases. The input terminal of the second detection unit serves as the second input terminal of the dual-channel detection unit. The input terminal of the second detection unit is connected to the sampling terminal of the power amplifier unit. The output terminal of the second detection unit is connected to the second input terminal of the integrator unit. The second detection unit is used to sample the second signal level and generate a second detection voltage. The second detection voltage decreases as the second signal level increases. The output terminal of the integrator unit is connected to the controlled terminal of the attenuation unit. The integrator unit is used to adjust the voltage value of the generated control signal according to the first detector voltage and the second detector voltage.

3. The power amplifier module according to claim 2, characterized in that, The integrator unit includes an operational amplifier, a first resistor, a second resistor, a third resistor, and a first capacitor; The non-inverting input of the operational amplifier is connected to the output of the second detector unit through the first resistor, the inverting input of the operational amplifier is connected to the output of the first detector unit through the second resistor, the first end of the third resistor is connected to the inverting input of the operational amplifier, the second end of the third resistor is connected to the first end of the first capacitor, and the second end of the first capacitor is connected to the output of the operational amplifier.

4. The power amplifier module according to claim 2 or 3, characterized in that, Both the first detection unit and the second detection unit include a detector, a fourth resistor, a second capacitor, and a third capacitor; The first input terminal of the detector is connected to the first terminal of the second capacitor, the second terminal of the second capacitor is grounded, the second input terminal of the detector is connected to the first terminal of the third capacitor, the second terminal of the third capacitor is connected to the first terminal of the fourth resistor, the second terminal of the fourth resistor is connected to the second terminal of the second capacitor, and the second input terminal of the detector is connected to the sampling terminal of the power drive unit or the sampling terminal of the power amplifier unit through the third capacitor.

5. The power amplifier module according to claim 4, characterized in that, The detector is a logarithmic detector.

6. The power amplifier module according to claim 4, characterized in that, The second detection unit further includes a first variable attenuator, the input of which is connected to the sampling end of the power amplifier unit, and the output of which is connected to the second terminal of the third capacitor in the second detection unit.

7. The power amplifier module according to claim 1, characterized in that, The power drive unit includes an isolator, a second variable attenuator, a first power amplifier, a coupler, an equalizer, and a first bandpass filter; The input terminal of the isolator is used to receive the radio frequency signal. The output terminal of the isolator is connected to the input terminal of the second variable attenuator. The output terminal of the second variable attenuator is connected to the input terminal of the first power amplifier. The output terminal of the first power amplifier is connected to the input terminal of the coupler. The first output terminal of the coupler is connected to the input terminal of the equalizer. The second output terminal of the coupler serves as the sampling terminal of the power drive unit and is connected to the first input terminal of the dual-channel detector unit. The output terminal of the equalizer is connected to the input terminal of the first bandpass filter. The output terminal of the first bandpass filter is connected to the input terminal of the attenuation unit.

8. The power amplifier module according to claim 1 or 7, characterized in that, The attenuation unit includes a third variable attenuator. The input of the third variable attenuator is connected to the output of the power drive unit, the output of the third variable attenuator is connected to the input of the power amplifier unit, and the control terminal of the third variable attenuator is connected to the output of the dual-channel detector unit. The third variable attenuator is used to receive the control signal and adjust the attenuation amount according to the control signal.

9. The power amplifier module according to claim 1, 2, or 7, characterized in that, The power amplification unit includes a second power amplifier, a second bandpass filter, a third power amplifier, and a high-power amplifier; The input terminal of the second power amplifier is connected to the output terminal of the attenuation unit, the output terminal of the second power amplifier is connected to the input terminal of the second bandpass filter, the output terminal of the second bandpass filter is connected to the input terminal of the third power amplifier, and the output terminal of the third power amplifier is connected to the input terminal of the high power amplifier, which is used to amplify the signal.

10. A satellite communication device, characterized in that, Includes the power amplifier module as described in any one of claims 1-9.

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