Multipath differential radio frequency power amplifier based on transformer

Abstract

The utility model provides a transformer-based multi-path differential radio frequency power amplifier. The transformer-based multi-path differential radio frequency power amplifier comprises a signal input module, a differential conversion module, a direct-current power supply module, a plurality of power amplification modules, a plurality of transformer output modules and a signal output module, the signal input module is connected with the differential conversion module; the anode output end of the differential conversion module is connected in parallel with a plurality of power amplification modules, and the cathode output end of the differential conversion module is connected in parallel with the remaining power amplification modules; each positive output power amplification module and each negative output power amplification module form a group, and the multiple groups of power amplification modules are jointly connected to the same transformer output module; the direct-current power supply module is connected with each power amplification module and supplies power to the power amplification modules; and the output ends of all the transformer output modules are connected in series and then pass through the signal output module. The technical problems that in the prior art, a transmission line transformer is complex in structure, limited in signal amplification capacity and complex in structure are solved.

Description

Technical Field

[0001] The present application belongs to the technical field of power amplifiers and relates to a transformer-based multi-channel differential radio frequency power amplifier. Background Art

[0002] To achieve higher power output, power combining technology is often required. Power combining technologies include spatial power combining and on-chip power combining. A common on-chip power combining technology is the transmission line transformer, which uses a ferrite core with excellent high-frequency performance and high magnetic permeability (μ).

[0003] In the high-frequency field, since signal energy is no longer coupled like in low-frequency transformers, and energy is transferred between input and output by an electromagnetic coupling chain, transmission line transformers are different from ordinary transformers. However, they are all coupled through magnetic flux mutual inductance. By controlling the turns ratio of the primary coil and the secondary coil, impedance transformation can be completed. The physical isolation of the primary coil and the secondary coil can form a DC isolation and provide ESD protection. The structure of the transmission line transformer is complex, and the function implementation technology and assembly process are equally complex. Utility Model Content

[0004] The present application provides a transformer-based multi-channel differential radio frequency power amplifier, which solves the technical problems in the prior art of complex transmission line transformer structure, limited signal amplification capability and complex structure.

[0005] This application adopts the following technical solutions:

[0006] The present application provides a transformer-based multi-channel differential radio frequency power amplifier, comprising:

[0007] The utility model provides a transformer-based multi-channel differential radio frequency power amplifier, comprising: a signal input module, a differential conversion module, a DC power supply module, multiple power amplification modules, multiple transformer output modules and a signal output module;

[0008] The signal input module is connected to the differential conversion module;

[0009] The positive output end of the differential conversion module is connected in parallel to multiple power amplifier modules, and the negative output end of the differential conversion module is connected in parallel to the remaining multiple power amplifier modules;

[0010] Each power amplifier module with positive and negative outputs is a group, and multiple groups of power amplifier modules are connected to the same transformer output module;

[0011] The DC power supply module is connected to each power amplifier module to provide power to it;

[0012] The output ends of all transformer output modules are connected in series and then pass through the signal output module.

[0013] Optionally, the output end of the differential conversion module includes an input winding and an output winding.

[0014] Optionally, the middle terminal of the output winding is grounded, the other terminal is the positive output terminal, and the terminal is the negative output terminal.

[0015] The beneficial effects of the present application are as follows: the present application uses a differential-differential conversion module to differentially divide the signal generated by the signal generator into two signals, one positive and one negative; these two signals are respectively amplified by multiple power amplifier modules connected in parallel, and then further combined by a transformer output module; the key point is that when the differentially amplified signal passes through the transformer output module, each positive and negative power amplifier module in this group passes through the transformer output module to output a signal twice the original signal; if N groups of power amplifier modules pass through the same transformer output module at the same time, the signal is amplified 2N times. In addition, if M differential conversion modules are output in series, each differential conversion module amplifies the original signal by 2N times, and M differential conversion modules are output in series, the original signal is amplified by 2N*M times. Therefore, the differential-differential conversion module provided by the present application can amplify the original signal by a limited number of times according to the number of power amplifier modules selected and the cascade method with the transformer output module, and has a simple structure and high efficiency. It can be widely used in non-destructive testing and acoustics, wireless signal transmission, electromagnetic fields, biomedicine and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall block diagram of a transformer-based multi-channel differential RF power amplifier provided in this application.

[0017] Figure 2 This is a structural diagram of a single differential conversion module provided by this application.

[0018] Figure 3 This is a schematic diagram of the connection structure of the two groups of power amplifier modules and the transformer output module provided in this application.

[0019] Figure 4 A schematic diagram of the parallel output structure of a differential conversion module provided in this application.

[0020] Among them: 1. Signal input module; 2. Differential conversion module; 3. DC power supply module; 4. Power amplifier module; 5. Transformer output module; 6. Signal output module. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] The present application is described in further detail below with reference to the accompanying drawings:

[0024] like Figure 1 As shown, the utility model provides a transformer-based multi-channel differential RF power amplifier, including: a signal input module 1, a differential conversion module 2, a DC power supply module 3, multiple power amplifier modules 4, multiple transformer output modules 5 and a signal output module 6; the signal input module 1 is connected to the differential conversion module 2; the positive output end of the differential conversion module 2 is connected in parallel with multiple power amplifier modules 4, and the negative output end of the differential conversion module 2 is connected in parallel with the remaining multiple power amplifier modules 4; each power amplifier module 4 with one positive and one negative output is a group, and multiple groups of the power amplifier modules are connected to the same transformer output module 5; the DC power supply module 3 is connected to each power amplifier module to supply power to it; the output ends of all the transformer output modules 5 are connected in series and then pass through the signal output module 6.

[0025] It should be noted that Figure 1 This is only a schematic structure of a transformer-based multi-channel differential RF power amplifier, and is not the only structure.

[0026] In one embodiment, each module is Figure 1The connection order is as follows. When in use, the signal input module 1 inputs the signal emitted by the signal generator into the differential conversion module 2. The differential conversion module 2 converts the input single-ended signal into a positive and a negative differential signal and outputs it from the output end. The positive end of the differential signal is connected in parallel with multiple power amplifier modules 4 to amplify each signal; the negative end of the differential signal is also connected in parallel with multiple power amplifier modules 4 to amplify each signal.

[0027] like Figure 2 As shown, optionally, the output end of the differential conversion module 2 includes an input winding and an output winding.

[0028] Optionally, terminal 202 in the middle of the output winding is grounded, terminal 201 is the positive output terminal, and terminal 203 is the negative output terminal. It should be noted that after the signal input module 1 inputs the signal to the input winding of the differential conversion module 2, by controlling the number of turns of the primary coil and the secondary coil and the output terminal on the secondary coil, the positive differential signal on the output winding is output from terminal 201, and the negative differential signal is output from terminal 202.

[0029] It should be noted that the number of power amplifier modules 4 connected in parallel to the positive end of the differential signal is consistent with the number of power amplifier modules 4 connected in parallel to the negative end of the differential signal. Figure 1 As shown, multiple power amplifier modules 4 amplify the input differential signal (a total of 16 groups, of which 8 groups are the positive ends of the differential signal and the remaining 8 groups are the negative ends of the differential signal. It should be noted that the number of power amplifier modules 4 is set according to actual needs and is not limited here), and the amplified signal is input into the transformer output module 5, and the DC power supply module 3 supplies power to each power amplifier module.

[0030] The power amplifier module 4 transmits the amplified signal to the transformer output module 5, which performs power synthesis and outputs the signal from the signal output module 6. The signal output module 6 adopts an N-type output interface. It should be noted that each power amplifier module 4 with one positive output and one negative output is a group. In order to achieve a certain amplification of the signal according to the requirements, the output ends of multiple groups of power amplifier modules 4 with one positive output and one negative output can be used as the input winding of the transformer output module 5. Figure 3 As shown, Figure 3In the figure, the transformer output module 5 includes an input winding 1 and an input winding 2, which perform one positive and one negative power synthesis to achieve signal amplification. At the same time, the output is output through the output winding terminal 501 and the terminal 502, realizing the power synthesis of the one positive and one negative output signals of the two groups of power amplifier modules 4. Due to the different coil winding methods, the signal is finally amplified in phase. In order to change the size of the signal output, the transformer output module 5 here can include 3 groups of input windings, and then output through the output winding to achieve power synthesis of the 3 groups of signals. Therefore, those skilled in the art can know that the combined cascade method of the output of multiple power amplifier modules 4 and the transformer output module 5 is not limited to the attached Figure 3 Or the combined embodiments mentioned in this specification can be configured or improved according to actual signal power combining requirements.

[0031] In one embodiment, after multiple transformer output modules 5 are connected in series, the synthesized signal is output through the signal output module 6 to achieve multi-channel signal amplification. Figure 3 and Figure 4 In this embodiment, 8 power amplifier modules 4 are used to amplify 8 positive differential signals, and 8 power amplifier modules 4 are used to amplify 8 negative differential signals. Figure 3 In the embodiment, every two groups of power amplifier modules 4 form a group, and every two groups of power amplifier modules 4 are connected to the same transformer output module 5, and finally divided into 4 groups of signals (2 groups of differential signal positive ends and 2 groups of differential signal negative ends) are power synthesized through 4 transformer output modules 5, such as Figure 4 As shown, the four transformer output modules simultaneously combine the four groups of signals in series and output them from the output module 6, thereby amplifying the input signals and achieving the technical effect of high-power output. It should be noted that those skilled in the art will understand that this is only one combination method, not all combination methods. To achieve the high-power output effect, three groups of power amplifier modules 4 can also be connected to the same transformer output module 5, four groups of power amplifier modules 4 can be connected to the same transformer output module 5, etc. The specific situation can be designed according to actual needs.

[0032] It should be noted that the transformer-based multi-channel differential RF power amplifier provided by this application has a wide range of applications, and can be specifically applied to non-destructive testing and acoustics, wireless signal transmission, electromagnetic fields, biomedicine and other fields.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0034] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present application should be included in the scope of protection of the claims of the present application.

Claims

1. A transformer-based multi-channel differential RF power amplifier, characterized in that: include: A signal input module (1), a differential conversion module (2), a DC power supply module (3), a plurality of power amplifier modules (4), a plurality of transformer output modules (5) and a signal output module (6); The signal input module (1) is connected to the differential conversion module (2); The positive output end of the differential conversion module (2) is connected in parallel to a plurality of the power amplification modules (4), and the negative output end of the differential conversion module (2) is connected in parallel to the remaining plurality of the power amplification modules (4); Each of the power amplifier modules (4) with positive and negative outputs forms a group, and multiple groups of the power amplifier modules (4) are connected to the same transformer output module (5); The DC power supply module (3) is connected to each of the power amplifier modules to supply power thereto; The output ends of all transformer output modules (5) are connected in series and then pass through the signal output module (6).

2. The transformer-based multi-channel differential RF power amplifier according to claim 1, wherein: The output end of the differential conversion module (2) includes an input winding and an output winding.

3. The transformer-based multi-channel differential RF power amplifier according to claim 2, characterized in that: The terminal (202) in the middle of the output winding is grounded, the other terminal (201) is the positive output terminal, and the terminal (203) is the negative output terminal.

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