A common base radio frequency power amplifier

Abstract

The embodiment of the present disclosure discloses a common-base radio frequency power amplifier, comprising: an input balun, an output balun, at least one transistor and a feedback circuit. Wherein, the first input end of the input balun receives a first signal; the second input end of the input balun is grounded; the emitter of the transistor is connected to the corresponding output end of the input balun; the collector of the transistor is connected to the corresponding input end of the output balun; the first output end of the output balun outputs a second signal; the second output end of the output balun is grounded; the base of the transistor is connected to the feedback circuit. The input balun, the transistor and the output balun are configured to amplify the first signal into the second signal. The feedback circuit is configured to generate a feedback signal based on the input balun and / or the output balun, and couple the feedback signal to the base of the transistor.

Description

Technical Field

[0001] This disclosure relates to the field of communications, specifically to a common-base radio frequency power amplifier. Background Technology

[0002] Radio frequency (RF) power amplifiers are an important component of various wireless transmitters, used to amplify RF signals. In the front-end circuit of a wireless transmitter, the RF signal generated by the modulation oscillator circuit has very low power. It needs to pass through a series of amplification stages to obtain sufficient RF power before it can be fed to the antenna for radiation.

[0003] While RF power amplifiers are widely used in RF circuits, they generally suffer from low gain. However, low-gain RF power amplifiers significantly increase the design complexity of other circuits within the RF circuitry, leading to higher design and manufacturing costs. Therefore, improving the gain of RF power amplifiers has become a problem that needs to be solved. Summary of the Invention

[0004] The technical solution of this disclosure embodiment is implemented as follows:

[0005] This disclosure provides a common-base radio frequency power amplifier, comprising: an input balun, an output balun, at least one transistor, and a feedback circuit; a first input terminal of the input balun receives a first signal; a second input terminal of the input balun is grounded; the emitter of the transistor is connected to an output terminal corresponding to the input balun; the collector of the transistor is connected to an input terminal corresponding to the output balun; a first output terminal of the output balun outputs a second signal; a second output terminal of the output balun is grounded; the feedback circuit is connected to the base of the transistor; the input balun, the transistor, and the output balun are configured to amplify the first signal into the second signal; the feedback circuit is configured to generate a feedback signal based on the input balun and / or the output balun, and couple the feedback signal to the base of the transistor.

[0006] In some embodiments of this disclosure, the feedback circuit includes: at least one feedback capacitor; a first terminal of the feedback capacitor is connected to the base of the corresponding transistor; and a second terminal of the feedback capacitor receives the feedback signal.

[0007] In some embodiments of this disclosure, the feedback circuit further includes: at least one feedback inductor; the feedback inductor is connected to a second terminal of the feedback capacitor; the feedback inductor is coupled to the input balun and / or the output balun.

[0008] In some embodiments of this disclosure, the feedback inductor is coupled to the differential inductor of the input balun and / or the differential inductor of the output balun.

[0009] In some embodiments of this disclosure, the at least one transistor includes: a first transistor and a second transistor; a first output terminal of the input balun is connected to the emitter of the first transistor; a first input terminal of the output balun is connected to the collector of the first transistor; a second output terminal of the input balun is connected to the emitter of the second transistor; a second input terminal of the output balun is connected to the collector of the second transistor; the feedback circuit includes: a first feedback capacitor and a second feedback capacitor; a first terminal of the first feedback capacitor is connected to the base of the first transistor; a first terminal of the second feedback capacitor is connected to the base of the second transistor.

[0010] In some embodiments of this disclosure, the second terminal of the first feedback capacitor is connected to the second input terminal of the output balun; the second terminal of the second feedback capacitor is connected to the first input terminal of the output balun.

[0011] In some embodiments of this disclosure, the feedback circuit further includes: a first feedback inductor; a second terminal of the first feedback capacitor and a second terminal of the second feedback capacitor, respectively connected to the two terminals of the first feedback inductor; and the first feedback inductor coupled to the input balun or the output balun.

[0012] In some embodiments of this disclosure, the at least one transistor includes: a third transistor; a first output terminal of the input balun is connected to the emitter of the third transistor; a first input terminal of the output balun is connected to the collector of the third transistor; the feedback circuit includes: a third feedback capacitor and a second feedback inductor; a first terminal of the third feedback capacitor is connected to the base of the third transistor; a second terminal of the third feedback capacitor is connected to the first terminal of the second feedback inductor; the second feedback inductor is coupled to either the input balun or the output balun; a second terminal of the second feedback inductor, a second output terminal of the input balun, and a second input terminal of the output balun are all grounded.

[0013] In some embodiments of this disclosure, the common-base radio frequency power amplifier further includes: at least one current source; the base of the transistor is connected to the corresponding current source.

[0014] In some embodiments of this disclosure, the common-base radio frequency power amplifier further includes: a preamplifier; the output terminal of the preamplifier is connected to the first input terminal of the input balun; the preamplifier is configured to preamplify the signal received by the common-base radio frequency power amplifier and output the first signal.

[0015] Understandably, the feedback circuit couples the signal from the transistor's input or output back to the transistor's base. This can affect the transistor's base voltage, thereby adjusting the Vbe equivalent RF swing to a suitable range and improving the amplifier's gain, power-added efficiency, and linearity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the circuit structure of a common-base radio frequency power amplifier in related technologies. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the circuit structure of a common-base radio frequency power amplifier in related technologies. Figure 2 ;

[0018] Figure 3 Schematic diagram of the circuit structure of the common-base radio frequency power amplifier provided in the embodiments of this disclosure Figure 1 ;

[0019] Figure 4 Schematic diagram of the circuit structure of the common-base radio frequency power amplifier provided in the embodiments of this disclosure Figure 2 ;

[0020] Figure 5 Schematic diagram of the circuit structure of the common-base radio frequency power amplifier provided in the embodiments of this disclosure Figure 3 ;

[0021] Figure 6 Schematic diagram of the circuit structure of the common-base radio frequency power amplifier provided in the embodiments of this disclosure Figure 4 ;

[0022] Figure 7 Schematic diagram of the circuit structure of the common-base radio frequency power amplifier provided in the embodiments of this disclosure Figure 5 ;

[0023] Figure 8 Schematic diagram of the circuit structure of the common-base radio frequency power amplifier provided in the embodiments of this disclosure Figure 6 ;

[0024] Figure 9 Schematic diagram of the circuit structure of the common-base radio frequency power amplifier provided in the embodiments of this disclosure Figure 7 . Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of this disclosure are further described in detail below with reference to the accompanying drawings and embodiments. The described embodiments should not be regarded as limitations on this disclosure. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0026] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0027] If the application documents contain similar descriptions such as "first / second", the following explanation shall be added: In the following description, the terms "first / second / third" are used only to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0028] In this document, when a layer / component is referred to as being "above" another layer / component, the layer / component may be directly above the other layer / component, or there may be an intermediate layer / component between them. Furthermore, in one orientation, a layer / component is "above" another layer / component; when the orientation is reversed, the layer / component may be "below" the other layer / component.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to be limiting of this disclosure.

[0030] Figure 1 A circuit of a common-base radio frequency power amplifier in the related art is shown.

[0031] refer to Figure 1 The common-base RF power amplifier includes two baluns: an input balun TF1 and an output balun TF2. The first input terminal of the input balun TF1 receives a first signal RF1, and the first output terminal of the output balun TF2 outputs a second signal RF2. Both the first signal RF1 and the second signal RF2 are RF signals. Through coupling, the input balun TF1 and the output balun TF2 amplify the power of the first signal RF1 and output the second signal RF2.

[0032] Continue to refer to Figure 1The common-base RF power amplifier also includes two transistors: a first transistor Q1 and a second transistor Q2. The first output terminal of the input balun TF1 is connected to the emitter of the first transistor Q1, and the first input terminal of the output balun TF2 is connected to the collector of the first transistor Q1. The second output terminal of the input balun TF1 is connected to the emitter of the second transistor Q2, and the second input terminal of the output balun TF2 is connected to the collector of the second transistor Q2. The first transistor Q1 and the second transistor Q2 can form a push-pull structure, thereby canceling even-order harmonics and increasing output power.

[0033] Continue to refer to Figure 1 The middle portion of the differential inductor of input balun TF1 (i.e., the inductor connecting the first transistor Q1 and the second transistor Q2) is connected to ground; similarly, the middle portion of the differential inductor of output balun TF2 (i.e., the inductor connecting the first transistor Q1 and the second transistor Q2) is connected to DC voltage source U1. Simultaneously, the second input terminal of input balun TF1 and the second output terminal of output balun TF2 are both grounded. This provides a stable quiescent operating point for both input balun TF1 and output balun TF2, thereby suppressing common-mode noise and reducing signal loss.

[0034] Figure 2 Another circuit for a common-base RF power amplifier in the related art is shown.

[0035] refer to Figure 2 The common-base RF power amplifier includes two baluns: an input balun TF1 and an output balun TF2. The first input terminal of the input balun TF1 receives a first signal RF1, and the first output terminal of the output balun TF2 outputs a second signal RF2. Both the first signal RF1 and the second signal RF2 are RF signals. Through coupling, the input balun TF1 and the output balun TF2 amplify the power of the first signal RF1 and output the second signal RF2.

[0036] Continue to refer to Figure 2 The common-base RF power amplifier also includes a transistor: a third transistor Q3. The first output terminal of the input balun TF1 is connected to the emitter of the third transistor Q3, and the first input terminal of the output balun TF2 is connected to the collector of the third transistor Q3.

[0037] Continue to refer to Figure 2 The second input and second output terminals of input balun TF1, as well as the second input and second output terminals of output balun TF2, are all grounded. This provides a stable quiescent operating point for input balun TF1 and output balun TF2, thereby suppressing common-mode noise and reducing signal loss.

[0038] It should be noted that the reference Figure 1 and Figure 2 The common-base RF power amplifier is called "common-base" because the bases of transistors Q1, Q2, and Q3 serve as the common terminals for both input and output. The input signal is received through the emitters of transistors Q1, Q2, and Q3, while the output signal is derived from the collectors of transistors Q1, Q2, and Q3. The bases of transistors Q1, Q2, and Q3 simultaneously serve as reference points for both the input and output circuits, forming a "common-base" structure.

[0039] Based on the impedance characteristics of transistors, common-base amplifiers have lower input impedance and higher output impedance, making them suitable for high-frequency signal amplification and widely used in radio frequency (RF) and microwave fields. Compared to common-emitter (common emitter) and common-collector (common collector) amplifiers, common-base amplifiers offer unique advantages in voltage gain and frequency response. Specifically, the current gain of a common-base amplifier is approximately 1, but its voltage gain is higher. Since the total power gain is determined by both voltage gain and impedance transformation, common-base amplifiers have a higher total power gain. Simultaneously, by using the base as a reference point, common-base amplifiers reduce the influence of transistor inter-electrode capacitance, effectively extending the amplifier's upper cutoff frequency, making them suitable for linear power amplification of RF signals.

[0040] exist Figure 1 and Figure 2 Based on the common-base RF power amplifier shown, embodiments of this disclosure provide a common-base RF power amplifier, such as... Figures 3 to 9 As shown.

[0041] refer to Figures 3 to 9 In any of the accompanying drawings, in this embodiment of the disclosure, the common-base radio frequency power amplifier includes: an input balun TF1, an output balun TF2, at least one transistor, and feedback circuits FB1 / FB2. The first input terminal of the input balun TF1 receives a first signal RF1, and the second input terminal of the input balun TF1 is grounded. The emitter of the transistor is connected to an output terminal corresponding to the input balun TF1, and the collector of the transistor is connected to an input terminal corresponding to the output balun TF2. The first output terminal of the output balun TF2 outputs a second signal RF2, and the second output terminal of the output balun TF2 is grounded. The input balun TF1, the transistor, and the output balun TF2 are configured to amplify the first signal RF1 into the second signal RF2. That is, the input balun TF1 and the output balun TF2, through coupling, can amplify the power of the first signal RF1 and output the second signal RF2.

[0042] In this embodiment of the disclosure, the base of the transistor is connected to a feedback circuit FB1 / FB2. The feedback circuit FB1 / FB2 is configured to generate a feedback signal based on the input balun TF1 and / or the output balun TF2, and couple the feedback signal to the base of the transistor. In other words, the feedback circuit FB1 / FB2 can couple the input or output signal of the transistor back to the base of the transistor, thereby affecting the base voltage of the transistor.

[0043] It is understood that the feedback circuit couples the signal input or output of the transistor back to the transistor's base, thus affecting the transistor's base voltage and adjusting the Vbe equivalent RF swing to a suitable range. The Vbe equivalent RF swing refers to the dynamic range of the transistor's base-emitter voltage (Vbe) under the influence of an RF signal, directly affecting the amplifier's linearity and efficiency. Therefore, the common-base RF power amplifier provided in this disclosure has higher gain, better power-added efficiency (PAE), and better linearity.

[0044] It should be noted that, Figure 3 , Figure 4 , Figure 5 and Figure 8 The feedback circuit FB2 shown generates a feedback signal based on the output balun TF2; that is, it provides feedback based on the transistor's output signal, which can be called "feedback." Correspondingly, Figure 6 , Figure 7 and Figure 9 The feedback circuit FB1 shown generates a feedback signal based on the input balun TF1, that is, it is based on the input signal of the transistor for feedback, which can be called "feedforward".

[0045] In some embodiments of this disclosure, the "feedforward" feedback circuit FB1 and the "feedback" feedback circuit FB2 can be separately configured in the common-base RF power amplifier, such as... Figures 3 to 9 The circuit shown is shown.

[0046] In some other embodiments of this disclosure, the "feedforward" feedback circuit FB1 and the "feedback" feedback circuit FB2 can be simultaneously disposed in the common-base RF power amplifier; that is, the "feedforward" feedback circuit FB1 and the "feedback" feedback circuit FB2 can simultaneously act on the base of the transistor.

[0047] In some embodiments of this disclosure, reference is made to Figures 3 to 9 In any of the accompanying drawings, the feedback circuit FB1 / FB2 includes at least one feedback capacitor (including feedback capacitor C1, C2, or C3). A first terminal of the feedback capacitor is connected to the base of the corresponding transistor, and a second terminal of the feedback capacitor receives the feedback signal. The feedback capacitor is configured to couple the feedback signal to the base of the transistor.

[0048] It is understandable that by utilizing the coupling effect of the feedback capacitor on the RF signal, the feedback signal can be coupled to the base of the transistor, affecting the base voltage of the transistor. Thus, the equivalent RF swing of Vbe can be adjusted to a suitable range, improving the gain, power-added efficiency, and linearity of the common-base RF power amplifier.

[0049] In some embodiments of this disclosure, reference is made to Figures 4 to 9 In any of the accompanying drawings, the feedback circuit FB1 / FB2 further includes: at least one feedback inductor (including feedback inductor L1 or L2). The feedback inductor is connected to the second terminal of the feedback capacitor and is coupled to the input balun and / or the output balun. The feedback inductor is configured to generate a feedback signal.

[0050] It is understandable that by utilizing the coupling effect between the feedback inductor and the input / output balun, a feedback signal can be generated. This feedback signal can then be coupled to the base of the transistor, affecting the base voltage of the transistor. Consequently, the equivalent RF swing Vbe can be adjusted to a suitable range, improving the gain, power-added efficiency, and linearity of the common-base RF power amplifier.

[0051] In some embodiments of this disclosure, reference is made to Figures 4 to 9 In any of the attached diagrams, the feedback inductor L1 or L2 is a differential inductor that couples the input balun TF1 and / or the output balun TF2.

[0052] In this embodiment, both the input balun TF1 and the output balun TF2 are constructed by winding and coupling a primary coil (i.e., a differential inductor) and a secondary coil (i.e., a single-ended inductor) together. The differential inductors of the input balun TF1 and the output balun TF2 are directly connected to the transistor, and the signal strength on the differential inductor is consistent with the input / output signal of the transistor. Therefore, the feedback inductor L1 or L2, coupled to the differential inductor, can generate a feedback signal based on the transistor's input / output signal, thereby more effectively influencing the transistor's base voltage and adjusting the Vbe equivalent RF swing to a suitable range.

[0053] In some embodiments of this disclosure, reference is made to Figures 3 to 7 In any of the accompanying drawings, at least one transistor includes: a first transistor Q1 and a second transistor Q2. The first output terminal of the input balun TF1 is connected to the emitter of the first transistor Q1, and the first input terminal of the output balun TF2 is connected to the collector of the first transistor Q1. The second output terminal of the input balun TF1 is connected to the emitter of the second transistor Q2, and the second input terminal of the output balun TF2 is connected to the collector of the second transistor Q2.

[0054] Continue to refer to Figures 3 to 7In any of the attached figures, the feedback circuit FB1 / FB2 includes: a first feedback capacitor C1 and a second feedback capacitor C2. The first terminal of the first feedback capacitor C1 is connected to the base of the first transistor Q1; the first terminal of the second feedback capacitor C2 is connected to the base of the second transistor Q2.

[0055] In some embodiments of this disclosure, reference is made to Figure 3 The second terminal of the first feedback capacitor C1 is connected to the second input terminal of the output balun TF2; the second terminal of the second feedback capacitor C2 is connected to the first input terminal of the output balun TF2. In this way, the first feedback capacitor C1 couples the output signal of the second transistor Q2 to the base of the first transistor Q1, and the second feedback capacitor C2 couples the output signal of the first transistor Q1 to the base of the second transistor Q2. The base voltage of each transistor can be adjusted based on the output signals of the symmetrical transistors, thus simplifying the circuit.

[0056] In some embodiments of this disclosure, reference is made to Figures 4 to 7 In any of the accompanying drawings, the feedback circuit FB1 / FB2 further includes: a first feedback inductor L1. The second terminal of the first feedback capacitor C1 and the second terminal of the second feedback capacitor C2 are respectively connected to the two terminals of the first feedback inductor L1. The first feedback inductor L1 is coupled to either the input balun TF1 or the output balun TF2.

[0057] In this embodiment of the disclosure, the first feedback inductor L1 is coupled to the differential inductor of the input balun TF1 or the differential inductor of the output balun TF2. The winding directions of the first feedback inductor L1 and the differential inductor can be the same or opposite. For example, in... Figure 4 In the circuit, the winding directions of the differential inductors of the first feedback inductor L1 and the output balun TF2 are the same; Figure 5 In this configuration, the winding directions of the differential inductors of the first feedback inductor L1 and the output balun TF2 are opposite. Figure 6 In the circuit, the winding direction of the differential inductor of the first feedback inductor L1 and the input balun TF1 is the same; Figure 7 In this circuit, the winding directions of the first feedback inductor L1 and the differential inductor of the input balun TF1 are opposite. Whether the winding directions are the same or opposite will affect the signal waveforms coupled to the bases of transistors Q1 and Q2, and can be set according to specific circumstances.

[0058] In some embodiments of this disclosure, reference is made to Figures 8 to 9 In any of the accompanying drawings, at least one transistor includes: a third transistor Q3. The first output terminal of the input balun TF1 is connected to the emitter of the third transistor Q3; the first input terminal of the output balun TF2 is connected to the collector of the third transistor Q3.

[0059] Continue to refer to Figures 8 to 9In any of the attached figures, the feedback circuit TF1 / TF2 includes: a third feedback capacitor C3 and a second feedback inductor L2. The first terminal of the third feedback capacitor C3 is connected to the base of the third transistor Q3; the second terminal of the third feedback capacitor C3 is connected to the first terminal of the second feedback inductor L2.

[0060] In this embodiment, the second feedback inductor L2 is coupled to either the input balun TF1 or the output balun TF2; wherein, the second feedback inductor L2 is coupled to the differential inductor of the input balun TF1 or the differential inductor of the output balun TF2. The second terminal of the second feedback inductor L2, the second output terminal of the input balun TF1, and the second input terminal of the output balun TF2 are all grounded; this provides a stable static operating point, thereby suppressing common-mode noise and reducing signal loss.

[0061] In some embodiments of this disclosure, reference is made to Figures 3 to 9 In any of the accompanying drawings, the common-base RF power amplifier further includes at least one current source A1, A2, or A3. The base of the transistor is connected to the corresponding current source; that is, the base of transistor Q1 is connected to current source A1, the base of transistor Q2 is connected to current source A2, and the base of transistor Q3 is connected to current source A3.

[0062] In this embodiment, the current source provides a constant bias current (Ib) to the base of the transistor, ensuring that the transistor always operates in the amplification region. Simultaneously, the constant current characteristic of the current source can reduce the random noise of the base current and improve the signal-to-noise ratio of the amplifier. Furthermore, the current source can control the base current, optimizing the transconductance (gm) of the transistor, thereby improving power gain and efficiency. Additionally, the base current source, in conjunction with the emitter signal input, utilizes the current amplification characteristics of the transistor to convert the small-signal current input to the emitter into a large-signal current output to the collector.

[0063] In some embodiments of this disclosure, reference is made to Figures 3 to 9 In any of the accompanying drawings, the common-base RF power amplifier further includes a preamplifier Amp1. The output of the preamplifier Amp1 is connected to the first input of the input balun TF1. The preamplifier Amp1 is configured to preamplify the signal received by the common-base RF power amplifier and output a first signal RF1.

[0064] In this embodiment, the preamplifier Amp1 can pre-amplify and pre-process the signal received by the common-base RF power amplifier to improve the gain of the common-base RF power amplifier; at the same time, the preamplifier Amp1 can isolate the signal source from the baluns TF1 / TF2 to avoid mutual interference.

[0065] It should be noted that, in this document, 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 a 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.

[0066] The sequence numbers of the embodiments disclosed above are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The methods disclosed in the several method embodiments provided in this disclosure can be arbitrarily combined to obtain new method embodiments without conflict. The features disclosed in the several product embodiments provided in this disclosure can be arbitrarily combined to obtain new product embodiments without conflict. The features disclosed in the several method or device embodiments provided in this disclosure can be arbitrarily combined to obtain new method embodiments or device embodiments without conflict.

[0067] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A common-base radio frequency power amplifier, characterized in that, The common-base RF power amplifier includes: an input balun, an output balun, at least one transistor, and a feedback circuit; The first input terminal of the input balun receives a first signal; the second input terminal of the input balun is grounded; the emitter of the transistor is connected to an output terminal corresponding to the input balun; the collector of the transistor is connected to an input terminal corresponding to the output balun; the first output terminal of the output balun outputs a second signal; the second output terminal of the output balun is grounded; the feedback circuit is connected to the base of the transistor. The input balun, the transistor, and the output balun are configured to amplify the first signal into a second signal; The feedback circuit is configured to generate a feedback signal based on the input balun and / or the output balun, and to couple the feedback signal to the base of the transistor; The feedback circuit includes: at least one feedback capacitor and at least one feedback inductor; a first terminal of the feedback capacitor is connected to the base of the corresponding transistor; a second terminal of the feedback capacitor receives the feedback signal; the feedback inductor is connected to the second terminal of the feedback capacitor; the feedback inductor is coupled to the input balun and / or the output balun.

2. The common-base RF power amplifier according to claim 1, characterized in that, The feedback inductor is coupled to the differential inductor of the input balun and / or the differential inductor of the output balun.

3. The common-base RF power amplifier according to claim 1, characterized in that, The at least one transistor includes: a first transistor and a second transistor; The first output terminal of the input balun is connected to the emitter of the first transistor; the first input terminal of the output balun is connected to the collector of the first transistor. The second output terminal of the input balun is connected to the emitter of the second transistor; the second input terminal of the output balun is connected to the collector of the second transistor. The feedback circuit includes: a first feedback capacitor and a second feedback capacitor; The first terminal of the first feedback capacitor is connected to the base of the first transistor; The first terminal of the second feedback capacitor is connected to the base of the second transistor.

4. The common-base RF power amplifier according to claim 3, characterized in that, The second end of the first feedback capacitor is connected to the second input terminal of the output balun; the second end of the second feedback capacitor is connected to the first input terminal of the output balun.

5. The common-base RF power amplifier according to claim 3, characterized in that, The feedback circuit further includes: a first feedback inductor; The second end of the first feedback capacitor and the second end of the second feedback capacitor are respectively connected to the two ends of the first feedback inductor; The first feedback inductor is coupled to either the input balun or the output balun.

6. The common-base RF power amplifier according to claim 1, characterized in that, The at least one transistor includes: a third transistor; The first output terminal of the input balun is connected to the emitter of the third transistor; the first input terminal of the output balun is connected to the collector of the third transistor. The feedback circuit includes: a third feedback capacitor and a second feedback inductor; The first terminal of the third feedback capacitor is connected to the base of the third transistor; the second terminal of the third feedback capacitor is connected to the first terminal of the second feedback inductor. The second feedback inductor is coupled to either the input balun or the output balun; The second terminal of the second feedback inductor, the second output terminal of the input balun, and the second input terminal of the output balun are all grounded.

7. The common-base radio frequency power amplifier according to any one of claims 1 to 6, characterized in that, The common-base radio frequency power amplifier further includes: at least one current source; The base of the transistor is connected to the corresponding current source.

8. The common-base radio frequency power amplifier according to any one of claims 1 to 6, characterized in that, The common-base RF power amplifier further includes: a preamplifier; The output of the preamplifier is connected to the first input of the input balun. The preamplifier is configured to preamplify the signal received by the common-base RF power amplifier and output the first signal.

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