Power amplifier

Abstract

The utility model belongs to the technical field of microwave power, and particularly discloses a power amplifier. According to the invention, the input radio-frequency signal is amplified through the power amplifier to obtain the first radio-frequency signal, at least one output port is selected from the plurality of output ports according to the control signal received by the output control module, and the first radio-frequency signal is output from the selected at least one output port, so that the reconfigurable output power is realized; therefore, the output power can be quickly switched among a plurality of output ports and can be simultaneously output, and the output flexibility and applicability of the power amplifier are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of microwave power, and more particularly, relates to a power amplifier. BACKGROUND

[0002] In the technical field of microwave power, a radio frequency power amplifier is a key component for realizing wireless transmission of a radio frequency signal. The function of the radio frequency power amplifier is to convert a radar signal received by an antenna to a transceiver assembly and amplify a small signal generated by the transceiver assembly to be radiated through the antenna. The performance of the radio frequency power amplifier directly affects interference effect, signal transmission strength, and the like.

[0003] In various application scenarios, the following requirements are often required: 1) the output power of a single power amplifier can be quickly switched to multiple different output ports (antennas); and 2) the output power of a single power amplifier can be simultaneously output to output ports in different directions. The power amplifier in the prior art cannot fully meet the above requirements. CONTENT OF THE INVENTION

[0004] In view of the defects in the prior art, the purpose of the application is to provide a power amplifier, which aims to solve the problem that the power amplifier in the prior art cannot realize quick switching and simultaneous output of output power between multiple output ports.

[0005] To achieve the above purpose, the application provides a power amplifier, which comprises:

[0006] A power amplification module, configured to amplify the power of an input radio frequency signal and output a first radio frequency signal.

[0007] An output control module, connected to the power amplification module, configured to select at least one output port from multiple output ports according to a received first control signal and output the first radio frequency signal through the at least one output port.

[0008] In some embodiments, the power amplification module comprises:

[0009] A power control module, configured to control the amplitude of the input radio frequency signal and output a second radio frequency signal.

[0010] A pre-stage amplification module, connected to the power control module, configured to amplify the power of the received second radio frequency signal and obtain a third radio frequency signal.

[0011] A post-stage amplification module, connected to the pre-stage amplification module, configured to amplify the power of the received third radio frequency signal and obtain the first radio frequency signal.

[0012] In some embodiments, the power control module comprises:

[0013] a level converter, configured to convert a received first voltage signal into a second voltage signal required by the digitally controlled attenuator;

[0014] The digitally controlled attenuator is connected to the level converter and is used to control the amplitude of the input radio frequency signal according to the received second voltage signal and output the second radio frequency signal.

[0015] In some embodiments, the preamplifier module includes:

[0016] a low noise amplifier, connected to the power control module, configured to amplify the power of the second radio frequency signal and output a fourth radio frequency signal;

[0017] a temperature-compensated attenuator connected to the low-noise amplifier, configured to compensate for the power of the received fourth radio frequency signal and output a fifth radio frequency signal;

[0018] The driving amplifier is connected to the low noise amplifier and is used to amplify the power of the received fifth radio frequency signal and output a third radio frequency signal.

[0019] In some embodiments, the post-amplification module includes:

[0020] a power amplifier tube connected to the pre-amplifier module, configured to amplify the power of the third radio frequency signal according to the received third voltage signal and output the first radio frequency signal;

[0021] The modulation switch chip is connected to the power amplifier tube and is used to convert the received fourth voltage signal into the third voltage signal required by the power amplifier tube.

[0022] In some embodiments, the output control module includes:

[0023] A driver, configured to output a second control signal according to the received first control signal;

[0024] The RF switch is connected to the driver and is used to select at least one output port from the multiple output ports according to the received second control signal, and output the first RF signal from the at least one output port through a circulator connected to the RF switch.

[0025] In some embodiments, further comprising:

[0026] The power supply unit is used to provide the required fifth voltage signal to the power amplification module and the output control module respectively.

[0027] In some embodiments, the power supply unit includes:

[0028] a power supply module, configured to output a sixth voltage signal according to the received input voltage signal,

[0029] The power management module is connected with the power module, and is used for providing the power amplification module and the output control module with required fifth voltage signals respectively according to the received sixth voltage signal.

[0030] In some embodiments, further comprising:

[0031] The first isolator is connected with the post-stage amplification module, and is used for preventing the first radio frequency signal from entering the post-stage amplification module from the pre-stage amplification module.

[0032] The second isolator is connected with the output control module, and is used for preventing the first radio frequency signal from entering the post-stage amplification module from the output control module.

[0033] In some embodiments, the pi attenuator is connected with the power amplification module, and is used for attenuating the input radio frequency signal and outputting the attenuated radio frequency signal to the power amplification module.

[0034] Overall, compared with the prior art, the above technical solutions conceived by the present application at least have the following beneficial effects:

[0035] The power amplifier provided by the present application realizes amplification of the input radio frequency signal through the power amplifier to obtain the first radio frequency signal, selects at least one output port from the multiple output ports according to the control signal received by the output control module, and outputs the first radio frequency signal from the selected at least one output port, so as to realize reconfiguration of the output power, make the output power can be quickly switched and simultaneously output between the multiple output ports, and improve the flexibility and applicability of the power amplifier output. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is one of the structural schematic diagrams of the power amplifier provided by the embodiments of the present application;

[0037] Figure 2 is the second structural schematic diagram of the power amplifier provided by the embodiments of the present application;

[0038] Figure 3 is the third structural schematic diagram of the power amplifier provided by the embodiments of the present application;

[0039] Figure 4 is the fourth structural schematic diagram of the power amplifier provided by the embodiments of the present application;

[0040] Figure 5 is the fifth structural schematic diagram of the power amplifier provided by the embodiments of the present application;

[0041] Figure 6 is the sixth structural schematic diagram of the power amplifier provided by the embodiments of the present application;

[0042] Figure 7Fig. 7 is a structural schematic diagram of a power amplifier according to an embodiment of the present application;

[0043] Figure 8 Fig. 8 is a structural schematic diagram of a power amplifier according to an embodiment of the present application;

[0044] Figure 9 Fig. 9 is a structural schematic diagram of a power amplifier according to an embodiment of the present application;

[0045] Figure 10 Fig. 10 is a structural schematic diagram of a power supply unit according to an embodiment of the present application;

[0046] Figure 11 Fig. 11 is a structural schematic diagram of an external interface according to an embodiment of the present application;

[0047] Figure 12 Fig. 12 is a structural schematic diagram of a power amplifier according to an embodiment of the present application.

[0048] In all the drawings, the same reference signs are used to indicate the same elements or structures, wherein 10 is a power amplification module, 20 is an output control module, 101 is a power control module, 102 is a pre-stage amplification module, 103 is a post-stage amplification module, 1011 is a level converter, 1012 is a digital control attenuator, 1021 is a low noise amplifier, 1022 is a temperature compensation attenuator, 1023 is a driving amplifier, 1031 is a power amplifier tube, 1032 is a modulation switch chip, 201 is a driver, 202 is a radio frequency switch, 203 is a circulator, 30 is a power supply unit, 301 is a power supply module, 302 is a power management module, 3021 is a power management chip, 3022 is an LDO, 3023 is a voltage dividing resistor, and 40 is an external interface. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0050] In order to improve the output power of the transmitted signal and achieve the purpose of interfering with the target, the present application provides a power amplifier, which can realize input multiple output power reconfiguration. Different distances require different output powers. When the power supply capability is limited and the transmission distance is small, the attenuator can be controlled to reduce the output power. For signals of different polarization modes, multiple ports can connect antennas of different polarization modes, so as to realize receiving and transmitting signals of different polarizations. The power amplifier can adapt to signals of different pulse widths, and has good pulse width adaptability.

[0051] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0052] Referring to Figure 1 The embodiments of the present application provide a power amplifier, comprising:

[0053] The power amplification module 10 is configured to amplify the power of the input radio frequency signal and output a first radio frequency signal.

[0054] The output control module 20 is connected to the power amplification module 10 and configured to select at least one output port from a plurality of output ports according to a received first control signal and output the first radio frequency signal through the at least one output port.

[0055] In the embodiments of the present application, the power amplifier can specifically include the power amplification module 10 and the output control module 20 connected to the power amplification module 10.

[0056] The power amplification module 10 can specifically be configured to amplify the power of the input radio frequency signal and output an amplified radio frequency signal, i.e., the first radio frequency signal.

[0057] In the embodiments of the present application, the frequency band of the input radio frequency signal is located in the C band.

[0058] The output control module 20 can be configured to select at least one output port from a plurality of output ports connected thereto according to a received control signal (i.e., the first control signal) and output the obtained first radio frequency signal through the selected at least one output port.

[0059] The power amplifier provided by the embodiments of the present application can amplify the input radio frequency signal through the power amplifier to obtain the first radio frequency signal, select at least one output port from a plurality of output ports according to a control signal received by the output control module, and output the first radio frequency signal from the selected at least one output port, thereby realizing the reconfiguration of the output power and enabling the output power to be quickly switched and simultaneously output among the plurality of output ports, and improving the flexibility and applicability of the output of the power amplifier. Further, in some embodiments, the power amplification module 10 includes:

[0060] The power control module 101 is configured to control the amplitude of the input radio frequency signal and output a second radio frequency signal.

[0061] The pre-stage amplification module 102 is connected to the power control module 101 and configured to amplify the power of the received second radio frequency signal to obtain a third radio frequency signal.

[0062] The post-stage amplification module 103 is connected to the pre-stage amplification module 102 and configured to amplify the power of the received third radio frequency signal to obtain the first radio frequency signal.

[0063] See further Figure 2 The power amplification module 10 may include a power control module 101 , a pre-stage amplification module 102 connected to the power control module 101 , and a post-stage amplification module 103 connected to the pre-stage amplification module 102 .

[0064] The power control module 101 is used to control the amplitude of the input RF signal, such as increasing or decreasing it, and output a second RF signal. By controlling the amplitude of the input RF signal through the power control module 101, the output power can be reconfigured.

[0065] The pre-amplifier module 102 is used to amplify the power of the second radio frequency signal transmitted by the power control module 101 and output a third radio frequency signal to provide appropriate driving power to the post-amplifier module 103 .

[0066] The post-amplification module 103 is configured to amplify the power of the third radio frequency signal transmitted by the pre-amplification module 102 again and output the first radio frequency signal.

[0067] Furthermore, in some embodiments, the power control module 101 includes:

[0068] The level converter 1011 is used to convert the received first voltage signal into a second voltage signal required by the digitally controlled attenuator 1012;

[0069] The digitally controlled attenuator 1012 is connected to the level converter 1011 and is configured to control the amplitude of the input radio frequency signal according to the received second voltage signal and output a second radio frequency signal.

[0070] See further Figure 3 The power control module 101 includes a level converter 1011 and a digitally controlled attenuator 1012 connected to the level converter 1011 .

[0071] The level converter 1011 can be used to convert the received first voltage signal (such as Figure 3 As shown, including +3V, +5V, +3V_CRAL1, +3V_CRAL2, +3V_CRAL3, +3V_CRAL4 and +3V_CRAL5) are converted into a second voltage signal (such as Figure 3 As shown, including A1 to A5, where A1 to A5 are all +5V). In addition, the digitally controlled attenuator also requires an input voltage signal of -5V. The voltage signals received by the level converter 1011, such as +3V_CRAL1, +3V_CRAL2, +3V_CRAL3, +3V_CRAL4, and +3V_CRAL5, are all input from the external interface 40.

[0072] The amplitude of the input radio frequency signal is controlled by controlling the attenuation amount of the digital attenuator 1012 (for example, the attenuation amount of the digital attenuator can be adjusted by adjusting the attenuation level of the digital attenuator), so as to finally realize the reconfiguration of the output power size.

[0073] By controlling the attenuation level of the attenuator, the signal adjustment amplitude of 0 dB to 31.5 dB can be realized, and the control precision is 0.5 dB.

[0074] Further, in some embodiments, the pre-stage amplification module 102 includes:

[0075] The low noise amplifier 1021 is connected with the power control module 101, and is configured to amplify the power of the second radio frequency signal and output a fourth radio frequency signal.

[0076] The temperature compensation attenuator 1022 is connected with the low noise amplifier 1021, and is configured to compensate the power of the received fourth radio frequency signal and output a fifth radio frequency signal.

[0077] The driver amplifier 1023 is connected with the low noise amplifier 1022, and is configured to amplify the power of the received fifth radio frequency signal and output a third radio frequency signal.

[0078] Further refer to Figure 4 , the pre-stage amplification module 1012 can include the low noise amplifier 1021, the temperature compensation attenuator 1022 and the driver amplifier 1023. Among them, the low noise amplifier 1021 is connected with the power control module 101, and more specifically connected with the digital attenuator 1012 in the power control module 101; the temperature compensation attenuator 1022 is connected with the low noise amplifier 1021, and the driver amplifier 1023 is connected with the temperature compensation attenuator 1022.

[0079] The low noise amplifier 1021 is configured to amplify the power of the second radio frequency signal output by the digital attenuator 1012 and output a fourth radio frequency signal, and transmit the fourth radio frequency signal to the temperature compensation attenuator 1022; the temperature compensation attenuator 1022 compensates the power of the received fourth radio frequency signal and outputs a fifth radio frequency signal, and transmits the fifth radio frequency signal to the driver amplifier 1023, so as to compensate the power at different temperatures and keep the output power stable at high and low temperatures; the driver amplifier 1023 is configured to amplify the power of the received fifth radio frequency signal again, so as to provide appropriate driving power for the post-stage amplification module 103.

[0080] In the embodiments of the present application, the saturation output power of the power amplifier can be realized to be 46 dBm through the low noise amplifier, the pre-stage amplification module and the post-stage amplification module.

[0081] Further, in some embodiments, the post-stage amplification module 103 includes:

[0082] The power amplifier 1031 is connected with the pre-amplification module 102, and is configured to amplify the power of the third radio frequency signal according to the received third voltage signal, and output a first radio frequency signal.

[0083] The modulation switch chip 1032 is connected with the power amplifier 1031, and is configured to convert the received fourth voltage signal into the third voltage signal required by the power amplifier 1031.

[0084] Further referring to Figure 5 , the post-amplification module 103 includes a power amplifier 1031 and a modulation switch chip 1032. The power amplifier 1031 is connected with the pre-amplification module 102, and more specifically, is connected with the driver amplifier 1023 in the pre-amplification module 102.

[0085] The power amplifier 1031 needs to be applied with a negative voltage and then a positive voltage to work normally. In the embodiment of the present application, the voltage signal applied to the power amplifier 1031 is a third voltage signal, as shown in Figure 5 , which can include +28V_VD and -2.4V. The power amplifier 1031, when working normally, can be used to amplify the power of the third radio frequency signal transmitted by the driver amplifier 1023 again, and output a first radio frequency signal.

[0086] The modulation switch chip 1032 can control the switch of the +28V_VD power supply of the power amplifier 1031, so as to realize the power reconfiguration of the large power output and the mute of the power amplifier. Specifically, when the modulation switch chip 1032 is turned on, the fourth voltage signal (as shown in Figure 5 , including +28V and -5V) received is modulated to +28V_VD to supply power to the power amplifier 1031. Whether the modulation switch chip 1032 is turned on or not can be determined by the control signal PA_CATL received by the modulation switch chip 1032.

[0087] In the embodiment of the present application, the control signal PA_CATL is input by the external interface 40.

[0088] In the embodiment of the present application, the digital control attenuator and the modulation switch chip can realize the power reconfiguration of multiple output powers, and the amplification circuit mode is flexible, diverse, and highly applicable, and can work normally in the pulse wave and continuous wave modes.

[0089] Further, in some embodiments, the output control module 20 includes:

[0090] The driver 201 is configured to output a second control signal according to the received first control signal.

[0091] The radio frequency switch 202 is connected with the driver 201, and is used for selecting at least one output port from the multiple output ports according to the received second control signal, and outputting the first radio frequency signal from the at least one output port through the circulator connected with the radio frequency switch 202.

[0092] Please further refer to Figure 6 The output control module 20 can include a driver 201, a radio frequency switch 202 connected with the driver 201, and a circulator 203 connected with the radio frequency switch 202.

[0093] The driver 201 receives a first control signal of an external interface, outputs multiple second control signals, and sends the multiple second control signals to the radio frequency switch 202, so as to realize the output channel switching function. One or more output ports are selected from multiple output ports according to needs, and are output through the circulator 203 connected therewith.

[0094] Please further refer to Figure 7 The output control module 20 includes a radio frequency switch 202, a circulator 203, and a driver 201. The radio frequency switch 202 realizes dual-power output; the driver 201 receives a first control signal (such as a polarization switching signal PA_POLAR) of an external interface, outputs two opposite second control signals (respectively used for realizing control signals of left-handed and right-handed), and sends the two second control signals to the radio frequency switch 202, so as to realize the channel switching function. The radio frequency switch 202 selects left-handed or right-handed transmission according to needs; the transmission channel is output through a circulator 203.

[0095] In the embodiment of the application, the polarization switching signal PA_POLAR is input by the external interface 40.

[0096] Please further refer to Figure 8 An amplitude limiter can also be added on the receiving channel to prevent the transmission channel power from leaking to the receiving channel and damaging the transceiver assembly circuit, such as a digital board.

[0097] The radio frequency signal input passes through the front-stage amplification module 102, and then passes through the rear-stage amplification module 103, and then the first radio frequency signal is divided into two radio frequency signals through a radio frequency switch 202. One radio frequency signal is connected to the left-handed antenna through a circulator 203, and the other radio frequency signal is connected to the right-handed antenna through a circulator 203. Then the radio frequency signal is radiated through the left-handed antenna or the right-handed antenna connected with the circulator 203; the left-handed antenna or the right-handed antenna receives the radiated signal, and then outputs from the other two ports through the circulator 203, and outputs to the transceiver assembly.

[0098] The power amplifier provided by the embodiment of the present application controls the radio frequency switch through the driver, so as to realize the change of the output from single path to multiple paths, and realize the switching of the output port, for example, realize the left-handed or right-handed emission, the emission channel is output through a circulator, and an amplitude limiter is added on the receiving channel to prevent the emission channel power from leaking to the receiving channel and damaging the transceiver component circuit.

[0099] Further, in some embodiments, the power amplifier further comprises:

[0100] The power supply unit is configured to provide a fifth voltage signal required by the power amplification module and the output control module, respectively.

[0101] Further referring to Figure 9 , the power amplifier can further comprise a power supply unit 30, which can provide a fifth voltage signal required by the power amplification module 10 and the output control module 20, respectively.

[0102] Further, in some embodiments, the power supply unit 30 comprises:

[0103] The power supply module 301 is configured to output a sixth voltage signal according to the received input voltage signal,

[0104] The power management module 302 is connected with the power supply module 301 and is configured to provide a fifth voltage signal required by the power amplification module and the output control module, respectively, according to the received sixth voltage signal.

[0105] Further referring to Figure 10 , the power supply unit 30 comprises a power supply module 301 and a power management module 302 connected with the power supply module 301.

[0106] The power supply module 301 is configured to output a sixth voltage signal according to the received input voltage signal, and supply power to the power management module 302. In the embodiment of the present application, the input voltage signal is DC 28V, and the output sixth voltage signal is +28V.

[0107] The power management module 302 converts the above-mentioned sixth voltage signal into a fifth voltage signal required by the power amplification module 10 and the output control module 20.

[0108] Specifically, the power management module 302 can include a power management chip 3021, low dropout regulators 3022 (LDOs), and a voltage dividing resistor 3023. Among them, the power management chip 302 is used to convert the input +28V voltage signal into -6V and +5V, and apply them to the low dropout regulators 3022 respectively, wherein one low dropout regulator 3022 converts the +8V voltage signal into +5V, and then another low dropout regulator 3022 connected thereto converts the +5V into +3.3V. Another low dropout regulator 3022 converts the input -6V voltage signal into a -5V voltage signal, and then outputs a -2.5V voltage signal through the voltage dividing resistor connected thereto.

[0109] In the embodiment of the present application, the DC 28V input received by the power module 301 can be input through an external interface 40, as shown in Figure 11

[0110] Further, in some embodiments, the power amplifier further comprises:

[0111] The first isolator is connected with the post-stage amplification module, and is used to prevent the first radio frequency signal from entering the pre-stage amplification module from the post-stage amplification module.

[0112] The second isolator is connected with the output control module, and is used to prevent the first radio frequency signal from entering the post-stage amplification module from the output control module.

[0113] Please further refer to Figure 12 The power amplifier further comprises a first isolator and a second isolator.

[0114] Among them, the first isolator 1024 is connected with the post-stage amplification module 103, and more specifically, the first isolator 1024 is connected between the drive amplifier 1023 and the power amplifier tube 1031, which can effectively prevent the first radio frequency signal from returning to the pre-stage amplification module 102 from the post-stage amplification module 103, and more specifically, the first isolator 1023 can effectively prevent the first radio frequency signal from returning to the drive amplifier 1023 from the power amplifier tube 1031, thereby playing a role in protecting the drive amplifier 1023.

[0115] The second isolator 1033 is connected between the power amplifier tube 1031 and the radio frequency switch 202, which can effectively prevent the first radio frequency signal from returning to the post-stage amplification module 103 from the output control module 20, and more specifically, the second isolator can isolate the amplified radio frequency signal from the power amplifier tube 1031 from returning to the power amplifier tube 1031 again, thereby playing a role in protecting the power amplifier tube 1031.

[0116] In the embodiment of the present application, the first isolator 1024 and the second isolator 1033 can both be diodes.

[0117] ​Further, in some embodiments, the power amplifier further comprises:

[0118] a pi attenuator connected with the power amplification module, configured to attenuate the input radio frequency signal and output the attenuated radio frequency signal to the power amplification module.

[0119] Please continue to see Figure 12 , the power amplifier further comprises a pi attenuator connected with the power amplification module 10, and more specifically, the pi attenuator is connected with the digital attenuator 1012.

[0120] The pi attenuator can be configured to attenuate the input radio frequency signal and transmit the attenuated radio frequency signal to the power amplification module 20.

[0121] The power amplifier provided by the embodiment of the application comprises a pre-stage amplification module 102, a post-stage amplification module 103, a power supply module 30, a power control module 101, an output control module 20 and a peripherally configured capacitor resistor. The power supply module 30 is configured to supply power to each module in the power amplifier. The pre-stage amplification module 102 provides appropriate input power for the post-stage amplification module 103, so that the post-stage amplification module 103 works normally. The power control module 101 controls the power of the radio frequency signal entering the pre-stage amplification module 102, so as to change the output power of the post-stage amplification module 103 and realize the reconfiguration of the output power. The output control module 103 realizes the switching of the output port of the power amplifier.

[0122] Specifically, the input end of the pre-stage amplification module 102 is connected with the radio frequency signal output by a digital board. After being amplified by a low-noise amplifier 1021 and a driving amplifier 1023, the pre-stage amplification module 102 provides appropriate driving power for the post-stage amplification module 103. The temperature compensation attenuator 1022 in the pre-stage amplification module 102 compensates the power of the radio frequency signal entering the pre-stage amplification module 102 at different temperatures, so that the output power remains stable at high and low temperatures.

[0123] The post-stage amplification module 103 can realize the output of the input radio frequency signal in two power states, i.e., a high-power state and a mute state. According to actual needs, the state can be switched. The post-stage amplification module 103 must be supplied with negative voltage before being supplied with positive voltage in order to realize normal amplification. In order to meet this requirement, a time sequence control is added to the power supply part to meet the requirement of normal working of the power amplifier tube 1031. After the radio frequency signal is amplified, it is first transmitted through a second isolator to prevent the amplified signal from being reflected back to the power amplifier tube 1031, which causes the power amplifier tube 1031 to fail to work.

[0124] The power control module 101 comprises a digital attenuator 1012 and a level converter 1011. The amplitude of the input radio frequency signal is controlled by controlling the attenuation of the digital attenuator 1012, so as to finally realize the reconfiguration of the output power size, realize the signal adjustment amplitude of 0dB-31.5dB, and the control precision is 0.5dB; the level converter 1011 is used to convert the received external +3.3V control signal into a +5V control signal that can be used by the digital attenuator 1012.

[0125] The output control module 20 comprises a radio frequency switch 202, a circulator 203 and a driver 201. The radio frequency switch 202 realizes dual-path power output; the driver 201 receives a control signal of one external interface, outputs two opposite control signals, and inputs the two control signals to the radio frequency switch 202, so as to realize the channel switching function, and select left-handed or right-handed transmission according to the need; the transmission channel is output through a circulator 203, and an amplitude limiter is added on the receiving channel to prevent the transmission channel power from leaking to the receiving channel and damaging the transceiver component circuit.

[0126] It should be understood that expressions such as "include" and "may include" used in the present application indicate the presence of disclosed functions, operations or constituent elements, and do not limit one or more additional functions, operations and constituent elements. In the present application, terms such as "include" and / or "have" can be interpreted to mean that specific features, numbers, operations, constituent elements, components or combinations thereof are present, but cannot be interpreted to exclude the presence or addition of one or more other features, numbers, operations, constituent elements, components or combinations thereof.

[0127] In addition, in the present application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" can include A, can include B, or can include both A and B.

[0128] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the term "connection" should be understood broadly, for example, "connection" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. Among them, "fixed connection" refers to the relative position relationship after connection is unchanged. "Rotary connection" refers to the relative rotation after connection. "Sliding connection" refers to the relative sliding after connection. The orientation language mentioned in the embodiments of the present application, such as "top", "bottom", "inner", "outer", "left", "right", etc., is only the direction of the drawing, therefore, the orientation language used is to better and more clearly illustrate and understand the embodiments of the present application, and is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0129] In addition, in the embodiments of the present application, the mathematical concepts mentioned, such as symmetry, equality, parallel, perpendicular, etc. These limitations are all for the current process level, and are not the absolute strict definition in the mathematical sense, and a small amount of deviation is allowed, such as approximately symmetrical, approximately equal, approximately parallel, approximately perpendicular, etc. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, the included angle between A and B can be between 0 degrees and 10 degrees. A is perpendicular to B, which means that A and B are perpendicular or approximately perpendicular, the included angle between A and B can be between 80 degrees and 100 degrees.

[0130] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power amplifier, characterized by, The power amplifier comprises: a power amplification module, configured to amplify power of an input radio frequency signal and output a first radio frequency signal; an output control module, connected to the power amplification module, configured to select at least one output port from a plurality of output ports according to a received first control signal, and output the first radio frequency signal through the at least one output port.

2. The power amplifier of claim 1, wherein, The power amplification module comprises: a power control module, configured to control amplitude of the input radio frequency signal and output a second radio frequency signal; a pre-stage amplification module, connected to the power control module, configured to amplify power of the received second radio frequency signal and obtain a third radio frequency signal; a post-stage amplification module, connected to the pre-stage amplification module, configured to amplify power of the received third radio frequency signal and obtain the first radio frequency signal.

3. The power amplifier of claim 2, wherein, The power control module comprises: a level converter, configured to convert a received first voltage signal into a second voltage signal required by a digital attenuator; the digital attenuator, connected to the level converter, configured to control amplitude of the input radio frequency signal according to the received second voltage signal and output the second radio frequency signal.

4. The power amplifier of claim 2, wherein, The pre-stage amplification module comprises: a low-noise amplifier, connected to the power control module, configured to amplify power of the second radio frequency signal and output a fourth radio frequency signal; a temperature compensation attenuator, connected to the low-noise amplifier, configured to compensate power of the received fourth radio frequency signal and output a fifth radio frequency signal; a drive amplifier, connected to the low-noise amplifier, configured to amplify power of the received fifth radio frequency signal and output the third radio frequency signal.

5. The power amplifier of claim 2, wherein, The post-stage amplification module comprises: a power amplifier tube, connected to the pre-stage amplification module, configured to amplify power of the third radio frequency signal according to a received third voltage signal and output the first radio frequency signal; a modulation switch chip, connected to the power amplifier tube, configured to convert a received fourth voltage signal into the third voltage signal required by the power amplifier tube.

6. The power amplifier of claim 1, wherein the output control module comprises: a driver, configured to output a second control signal according to the received first control signal; a radio frequency switch, connected to the driver, configured to select at least one output port from a plurality of output ports according to the received second control signal, and output the first radio frequency signal from the at least one output port through a circulator connected to the radio frequency switch.

7. The power amplifier of any one of claims 1-6, wherein, Further comprising: a power supply unit, configured to provide a required fifth voltage signal for the power amplification module and the output control module respectively.

8. The power amplifier of claim 7, wherein, The power supply unit comprises: a power module, configured to output a sixth voltage signal according to a received input voltage signal, a power management module, connected to the power module, configured to provide the required fifth voltage signal for the power amplification module and the output control module respectively according to the received sixth voltage signal.

9. The power amplifier of any of claims 2-5, wherein, Further comprising: a first isolator, connected to the post-stage amplification module, configured to prevent the first radio frequency signal from entering the pre-stage amplification module from the post-stage amplification module. A second isolator is connected with the output control module, and is used for preventing the first radio frequency signal from entering the post-stage amplification module from the output control module.

10. The power amplifier of any one of claims 1-6, wherein, Further comprising: A π attenuator is connected with the power amplification module, and is used for attenuating the input radio frequency signal and outputting the attenuated radio frequency signal to the power amplification module.

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