Balanced topology multi-signal duplex synthesis and power amplifier and amplification method

Abstract

Balanced topology multi-signal duplex synthesis and power amplifier and amplification method based on, belong to communication technical field, include: the two ports of the input side of first stage 90 DEG electric bridge receive a frequency point signal respectively, the two ports of the output side of first stage 90 DEG electric bridge are connected the input end of two power amplifiers of two branches respectively, and the output end of two amplifiers is connected to the two ports of the input side of secondary 90 DEG electric bridge respectively.The present application has the advantages of balanced amplifier power synthesis and high stability, and also has the function of double-band signal duplex synthesis and power amplifier, avoids the problem of amplifier gain decline caused by the insertion loss of duplexer or combiner.Compared with the traditional balanced amplifier, the method realizes duplex synthesis, filtering and power amplification with extremely simple topology, effectively improves the efficiency of the amplifier, and effectively reduces the number of hardware and improves the performance of the amplifier.

Description

Technical Field

[0001] This invention relates to a balanced topology multi-signal duplex synthesis and power amplifier and amplification method, belonging to the field of communication technology. Background Technology

[0002] Modern wireless communication systems often operate under multiple frequency standards. To enable a single hardware component to cover multiple communication frequencies, multi-passband power amplifiers have become a research hotspot in recent years. Obtaining a dual-band power amplifier requires not only matching the fundamental impedance but also providing harmonic impedance terminations for two or more different communication bands. Furthermore, it often necessitates duplexing of the two band signals, which makes amplifier design extremely complex and is one of the main reasons limiting the realization of multi-band power amplifiers. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a balanced topology multi-signal duplex synthesis and power amplifier and amplification method, which realizes the duplex integration of dual signals at the same time, so as to meet the needs of dual-frequency, duplex transmitters at the lowest cost.

[0004] The technical solution of this invention is: a balanced topology multi-signal duplex synthesizer and power amplifier, including a primary 90° bridge and a secondary 90° bridge, and two branches connecting the two; wherein

[0005] The two input ports of the primary 90° bridge each receive a frequency signal; the two output ports of the primary 90° bridge are respectively connected to the input terminals of the two power amplifiers of the two branches, and the output terminals of the two amplifiers are respectively connected to the two input ports of the secondary 90° bridge; among the two output ports of the secondary 90° bridge, the through port outputs the required superimposed signal, and the two signals with opposite phases at the coupling port cancel each other out.

[0006] Furthermore, for the two input frequency signals, the phase of the first-stage 90° bridge remains unchanged at its through-end, while the phase changes by 90° simultaneously at the coupling end.

[0007] Furthermore, for the two input frequency signals, the secondary 90° bridge maintains a constant phase at its through-end and simultaneously changes phase values ​​to 90° and -90° at the coupling end.

[0008] Furthermore, the in-band characteristic matching of the primary 90° bridge and the secondary 90° bridge meets preset conditions to achieve the superposition of the required signal at the output of the secondary 90° bridge and the signal cancellation and shielding at its coupling end.

[0009] Furthermore, both branches include a wideband input matching circuit, an RC stabilization circuit, a transistor, and a dual impedance matching circuit to ensure that the amplifier has preset efficiency, gain, and flatness performance.

[0010] Furthermore, the dual impedance matching circuit satisfies that the load impedance is in the maximum power region.

[0011] Furthermore, the power amplifiers of the two branches are dual-band power amplifiers.

[0012] The method for balanced topology multi-signal duplex synthesis and power amplification based on balanced topology multi-signal duplex synthesis and power amplification, as described above, includes:

[0013] At the first-stage 90° bridge, frequency signals are input to its two input ports respectively; the phase and power of the two signals undergo their first change, and are amplified by the power amplifiers of the two branches respectively;

[0014] At the secondary 90° bridge, the phase and power of the two signals change again. Based on the changes in phase and power, the two signals are superimposed and output at the same output port of the secondary 90° bridge, and signal shielding and cancellation are achieved at the same isolation port.

[0015] The advantages of this invention compared to the prior art are:

[0016] (1) This invention proposes a novel balanced amplifier topology, which realizes the duplex synthesis of two signals, reduces the gain requirement of the entire link, and reduces hardware overhead.

[0017] (2) This invention achieves duplex synthesis and power amplification of dual-band signals through a novel 90° bridge circuit design, avoiding the amplifier gain reduction problem caused by duplexer or combiner insertion loss;

[0018] (3) This invention proposes a balanced power amplifier design method, which realizes the advantages of balanced amplifier power synthesis and high stability. It can be widely used in various power multi-frequency coverage transmitters and has important application value. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 This is a schematic diagram of the topology of a novel dual-band balanced power amplifier with duplex functionality according to the present invention.

[0021] Figure 2 This is a schematic diagram illustrating a second 90-degree bridge design example of the present invention;

[0022] Figure 3 This is a flowchart illustrating a specific implementation of the dual-band power amplifier based on a balanced topology according to the present invention.

[0023] Figure 4 (a) and (b) are schematic diagrams showing the phase changes of two frequency signals, Sig1 and Sig2, respectively.

[0024] Figure 5 This is a schematic diagram illustrating a design example of a novel dual-band balanced power amplifier with duplex functionality according to the present invention. Detailed Implementation

[0025] To better understand the above technical solutions, the technical solutions of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0026] The following description, in conjunction with the accompanying drawings, provides a more detailed account of a balanced topology-based multi-signal duplex synthesizer and power amplifier and amplification method provided in this application. Specific implementation methods may include: topology as follows... Figure 1 As shown, the amplifier consists of a first 90° bridge, a first branch power amplifier, a second branch power amplifier, and a second 90° bridge. The first 90° bridge provides a phase change of ΔΦ = 90° for both signals f1 and f2 at the two frequencies. The first branch power amplifier and power amplifier 2 can simultaneously satisfy load matching at both signals f1 and f2, ensuring normal amplification output at the required frequencies. The second 90° bridge provides a phase change of ΔΦ = 90° for signal f1 and a phase change of ΔΦ = -90° for signal f2.

[0027] The design layout and simulation curves of the second 90° bridge are as follows: Figure 2 As shown, this bridge exhibits good transmission characteristics for signals f1 and f2 at two frequency points, and also has a certain suppression effect on the frequency band transmission characteristics between the two frequency points. Simultaneously, it ensures that the phase difference between signals f1 and f2 at the two frequency points is opposite. By inputting the signals to the two ports of the first-stage bridge separately, and amplifying the signals through the upper and lower branch power amplifiers, the signals are finally superimposed and canceled at the second-stage bridge, achieving a unified output at the output port. The signals at the isolation ports have opposite phases, thus achieving cancellation and isolation.

[0028] In the solutions provided in this application, the specific implementation method of the dual-channel combining and amplification method of the power amplifier based on the balanced topology is as follows: Figure 3 The detailed steps are as follows:

[0029] (1) At the first 90° bridge, input frequency signals Sig1 and Sig2 at the two ports respectively;

[0030] (2) The phase and power of the two signals Sig1 and Sig2 undergo their first changes;

[0031] (3) The two signals Sig1 and Sig2 are amplified by power amplifiers respectively;

[0032] (4) At the second-stage 90° bridge, the phase and power of the two signals Sig1 and Sig2 change again;

[0033] (5) Based on the phase and power changes, the two signals Sig1 and Sig2 are superimposed and output at the same output port, and the signal shielding and cancellation are achieved at the same isolation port.

[0034] (6) Two signals are output at the same output port, thereby realizing duplex synthesis and power amplification of the two signals.

[0035] For details on the phase method during the above signal transmission process, please refer to [link / reference]. Figure 4 The changes of the two signals Sig1 and Sig2 during signal transmission are as follows:

[0036] (1) For signal 1, fed from port 1, its phase relationship is as follows: Assuming that the initial phase of signal 1 is 0°, after passing through the first 90° bridge, its phase change with respect to Sig1 is ΔΦ = 90°. According to its phase relationship, the phase is 0° in the path where VA1 is located and 90° in the path where VB1 is located. After passing through the second 90° bridge, its phase change with respect to Sig1 is ΔΦ = 90°. According to its phase relationship, two signals with opposite phases are obtained at the load matching end, which cancel each other out. At the output end, two signals with the same phase are obtained. The two signals are superimposed on each other, realizing the normal output of signal 1.

[0037] (2) For signal 2, fed from port 2, its phase relationship is as follows: Assuming that the initial phase of signal 2 is 0°, after passing through the first 90° bridge, its phase change with respect to Sig2 is ΔΦ = 90°. According to its phase relationship, the phase is 90° in the path where VA1 is located and 0° in the path where VB1 is located. After passing through the second 90° bridge, its phase change with respect to Sig2 is ΔΦ = -90°. According to its phase relationship, two signals with opposite phases are obtained at the load matching end, which cancel each other out. At the output end, two signals with the same phase are obtained. The two signals are superimposed on each other, realizing the normal output of signal 2.

[0038] As shown in Appendix 5, a design example employing the above-mentioned balanced topology-based multi-signal duplex combining and power amplification method combines the advantages of balanced amplifier power combining and high stability with the functions of dual-band signal duplex combining and power amplification, avoiding the amplifier gain reduction problem caused by duplexer or combiner insertion loss. Compared with traditional balanced amplifiers, this method achieves duplex combining, filtering, and power amplification simultaneously with a minimal topology, effectively improving amplifier efficiency, reducing hardware requirements, and enhancing amplifier performance. It can be widely applied in various power multi-frequency coverage transmitters, demonstrating significant application value.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

[0041] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A balanced topology multi-signal duplex synthesizer and power amplifier, characterized in that, It includes a primary 90° bridge and a secondary 90° bridge, as well as two branches connecting the two; among which The two input ports of the primary 90° bridge each receive a frequency signal; the two output ports of the primary 90° bridge are respectively connected to the input terminals of the two power amplifiers of the two branches, and the output terminals of the two amplifiers are respectively connected to the two input ports of the secondary 90° bridge; among the two output ports of the secondary 90° bridge, the through port outputs the required superimposed signal, and the two signals with opposite phases at the coupling port cancel each other out. For the two input frequency signals, the phase of the first-stage 90° bridge remains unchanged at its through-end, while the phase changes by 90° at the coupling end. For the two input frequency signals, the secondary 90° bridge maintains a constant phase at its through-end and simultaneously changes the phase value to 90° and -90° at the coupling end. The in-band characteristic matching of the primary 90° bridge and the secondary 90° bridge meets the preset conditions to achieve the superposition of the required signal at the output of the secondary 90° bridge and the signal cancellation and shielding at its coupling end. Both branches include a wideband input matching circuit, an RC stabilization circuit, a transistor, and a dual impedance matching circuit to ensure that the amplifier has preset efficiency, gain, and flatness performance. The dual impedance matching circuit ensures that the load impedance is in the maximum power region. The power amplifiers for the two branches are dual-band power amplifiers.

2. The method for balanced topology multi-signal duplex synthesis and power amplification based on balanced topology multi-signal duplex synthesis and power amplification according to claim 1, characterized in that, include: At the first-stage 90° bridge, frequency signals are input to its two input ports respectively; the phase and power of the two signals undergo their first change, and are amplified by the power amplifiers of the two branches respectively; At the secondary 90° bridge, the phase and power of the two signals change again. Based on the changes in phase and power, the two signals are superimposed and output at the same output port of the secondary 90° bridge, and signal shielding and cancellation are achieved at the same isolation port.

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