Broadband power amplifier circuit, multi-band co-transmitting RRU circuit and signal processing method

Abstract

The invention provides a broadband power amplifier circuit, a multi-band co-transmitting RRU circuit and a signal processing method, and belongs to the field of communication. The broadband power amplifier circuit comprises a single-frequency signal processing circuit used for receiving an input dual-frequency signal, performing signal separation from the dual-frequency signal to obtain two paths of single-frequency signals, and performing power amplification processing on each single-frequency signal to obtain an amplified single-frequency signal corresponding to each single-frequency signal; the dual-frequency signal processing circuit is used for performing power amplification processing on the dual-frequency signal to obtain a target dual-frequency signal; the plurality of signal processing devices are respectively connected with the dual-frequency signal processing circuit and one path of amplified single-frequency signal output by the single-frequency signal processing circuit, and are used for carrying out signal separation processing on the target dual-frequency signal to obtain a separated single-frequency signal corresponding to one path of amplified single-frequency signal; and performing power synthesis processing on the amplified single-frequency signal and the separated single-frequency signal to obtain a target single-frequency signal. According to the invention, power and efficiency loss caused by broadband matching and power synthesis can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of signal processing, and in particular to a broadband power amplifier circuit, a multi-band co-transmitting RRU circuit and a signal processing method. Background Art

[0002] With the development of mobile communications, the Remote Radio Unit (RRU) needs to support the need to transmit in multiple frequency bands. Currently, for certain broadband requirements, all branches in most power amplifier circuits use ultra-wideband matching technology, and the power synthesis part in the circuit also uses ultra-wideband synthesis technology to achieve power amplification using ultra-wideband technology.

[0003] As the demand for bandwidth becomes faster and faster, the use of ultra-wideband technology has two problems: the power amplifier efficiency drops too much, and the requirements for the power amplifier tube are very high. If a higher-power power amplifier tube is selected, it will lead to low efficiency and increased costs when working at rated power. Summary of the invention

[0004] The present invention provides a broadband power amplifier circuit, a multi-band co-transmitting RRU circuit and a signal processing method, aiming to reduce power and efficiency losses caused by broadband matching and power synthesis.

[0005] In a first aspect, the present application provides a broadband power amplifier circuit, comprising:

[0006] The single-frequency signal processing circuit is used to receive an input dual-frequency signal, perform signal separation from the dual-frequency signal to obtain two single-frequency signals, and perform power amplification processing on each of the single-frequency signals to obtain an amplified single-frequency signal corresponding to each of the single-frequency signals;

[0007] A dual-frequency signal processing circuit, used for performing power amplification processing on the dual-frequency signal to obtain a target dual-frequency signal;

[0008] A plurality of signal processing devices are respectively connected to the dual-frequency signal processing circuit and the amplified single-frequency signal output by the single-frequency signal processing circuit, and are used to perform signal separation processing on the target dual-frequency signal to obtain a separated single-frequency signal corresponding to the amplified single-frequency signal; and perform power synthesis processing on the amplified single-frequency signal and the separated single-frequency signal to obtain the target single-frequency signal.

[0009] In the second aspect, the present application also provides a multi-band co-transmitting RRU circuit for an active antenna unit applied to a communication base station, the multi-band co-transmitting RRU circuit comprising a radio frequency signal amplification circuit, a broadband power amplifier circuit, a filter circuit and an antenna assembly; the radio frequency signal amplification circuit is connected to the filter circuit via the broadband power amplifier circuit, and the filter circuit is also connected to the antenna assembly, wherein the broadband power amplifier circuit is the broadband power amplifier circuit provided in the first aspect.

[0010] In a third aspect, the present application further provides a signal processing method applied to the broadband power amplifier circuit provided in the first aspect, the method comprising:

[0011] receiving an input dual-frequency signal;

[0012] Separating the dual-frequency signal to obtain two single-frequency signals, and performing power amplification processing on each of the single-frequency signals to obtain an amplified single-frequency signal corresponding to each of the single-frequency signals;

[0013] Performing power amplification processing on the dual-frequency signal to obtain a target dual-frequency signal;

[0014] According to the connection relationship between the signal processing device in the broadband power amplifier circuit and the single-frequency signal processing circuit, the target dual-frequency signal output by the dual-frequency signal processing circuit is subjected to signal separation processing to obtain a separated single-frequency signal corresponding to the amplified single-frequency signal; and the amplified single-frequency signal and the separated single-frequency signal corresponding to the amplified single-frequency signal are subjected to power synthesis processing to obtain a target single-frequency signal.

[0015] The present application provides a broadband power amplifier circuit, a multi-band co-transmitting RRU circuit and a signal processing method. The present application uses a broadband power amplifier circuit to perform narrowband matching in a single-frequency signal processing circuit, effectively improving the efficiency of the power amplifier when working at rated power, and performs broadband matching in a dual-frequency signal processing circuit to meet the multi-band shared output capability of the system, and the signal processing device can perform signal separation, so that the power amplifier of the dual-frequency signal processing circuit does not have the shutdown problem after being combined into the link, thereby improving the rated efficiency of the power amplifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the structure of a broadband power amplifier circuit provided in this application;

[0018] Figure 2a A schematic diagram of the structure of a broadband power amplifier circuit provided in one embodiment of the present application;

[0019] Figure 2b for Figure 2a A circuit element structure diagram of a broadband power amplifier circuit is provided;

[0020] Figure 3aA schematic structural diagram of a broadband power amplifier circuit provided by another embodiment of the present application;

[0021] Figure 3b for Figure 3a A circuit element structure diagram of a broadband power amplifier circuit is provided;

[0022] Figure 4a A schematic structural diagram of a broadband power amplifier circuit provided in yet another embodiment of the present application;

[0023] Figure 4b for Figure 4a A circuit element structure diagram of a broadband power amplifier circuit is provided;

[0024] Figure 5 A schematic structural diagram of a broadband power amplifier circuit provided by another embodiment of the present application;

[0025] Figure 6a A schematic structural diagram of a broadband power amplifier circuit provided in yet another embodiment of the present application;

[0026] Figure 6b for Figure 6a A circuit element structure diagram of a broadband power amplifier circuit is provided;

[0027] Figure 7 A schematic diagram of the structure of a multi-band co-transmitting RRU circuit provided in one embodiment of the present application;

[0028] Figure 8 A flowchart of the steps of a signal processing method provided in one embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in this application to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0031] It should be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] The present application provides a broadband power amplifier circuit, a multi-band co-transmitting RRU circuit and a signal processing method. The broadband power amplifier circuit can be applied to a multi-band co-transmitting RRU circuit, and the broadband power amplifier circuit provides the system with a multi-band power sharing output capability and improves the efficiency of the power amplifier when working at rated power.

[0033] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a broadband power amplifier circuit provided in this application.

[0035] like Figure 1 As shown, the broadband power amplifier circuit 100 includes a single-frequency signal processing circuit 10 , a dual-frequency signal processing circuit 20 and a plurality of signal processing devices 30 .

[0036] The single-frequency signal processing circuit 10 is used to receive an input dual-frequency signal, perform signal separation from the dual-frequency signal to obtain two single-frequency signals, and perform power amplification processing on each single-frequency signal to obtain an amplified single-frequency signal corresponding to each single-frequency signal. The dual-frequency signal processing circuit 20 is used to perform power amplification processing on the dual-frequency signal to obtain a target dual-frequency signal. A plurality of signal processing devices 30 are respectively connected to the dual-frequency signal processing circuit 20 and an amplified single-frequency signal output by the single-frequency signal processing circuit 10, and are used to perform signal separation processing on the target dual-frequency signal to obtain a separated single-frequency signal corresponding to the amplified single-frequency signal; and power synthesis processing is performed on the amplified single-frequency signal and the separated single-frequency signal to obtain a target single-frequency signal.

[0037] In a specific implementation process, the dual-frequency signal is composed of, for example, a single-frequency signal with a frequency band of F1 and a single-frequency signal with a frequency band of F2. Therefore, after the dual-frequency signal is input into the single-frequency signal processing circuit 10, the single-frequency signal processing circuit 10 performs signal separation on the dual-frequency signal to obtain a single-frequency signal with a frequency band of F1 and another single-frequency signal with a frequency band of F2, and performs power amplification processing on the two single-frequency signals respectively to obtain an amplified single-frequency signal corresponding to each single-frequency signal; at the same time, the dual-frequency signal is also input into the dual-frequency signal processing circuit 20, and the dual-frequency signal processing circuit 20 performs power amplification processing on the dual-frequency signal to obtain a target dual-frequency signal. The signal processing device 30 is connected to one output interface of the dual-frequency signal processing circuit 20 and the single-frequency signal processing circuit 10 respectively to receive one amplified single-frequency signal output by the single-frequency signal processing circuit 10. The signal processing device 30 is also used to perform signal separation processing on the target dual-frequency signal to obtain a separated single-frequency signal corresponding to the received amplified single-frequency signal, and to perform power synthesis processing on the amplified single-frequency signal and the separated single-frequency signal to obtain the target single-frequency signal. It can be understood that the difference between the frequency band of the amplified single-frequency signal and the frequency band of the separated single-frequency signal corresponding to the amplified single-frequency signal is less than or equal to a preset threshold. Through the above process, the matching, synthesis and power amplification processing of the signal are completed, and the output of multi-band power sharing is realized.

[0038] It should be noted that, in the process of the signal processing device 30 realizing power synthesis, there is a role of impedance isolation. Specifically, the impedance isolation of power synthesis can be realized by electronic components such as a circulator or a bridge provided in the following embodiments.

[0039] In one embodiment, the single-frequency signal processing circuit 10 includes a plurality of signal processing sub-circuits, each of which corresponds to an amplified single-frequency signal. The signal processing device 30 includes a circulator, each of which is connected to the dual-frequency signal processing circuit 20 and a signal processing sub-circuit in the single-frequency signal processing circuit 10.

[0040] Exemplarily, the number of signal processing devices 30 is the same as the number of signal processing sub-circuits in the single-frequency signal processing circuit 10. For example, when the single-frequency signal processing circuit 10 includes two signal processing sub-circuits, the broadband power amplifier circuit 100 includes two signal processing devices 30, that is, two circulators, and each circulator is respectively connected to the dual-frequency signal processing circuit 20 and a signal processing sub-circuit.

[0041] See also Figure 2a and Figure 2b , Figure 2a Schematic diagram of the structure of a broadband power amplifier circuit 100 provided in one embodiment of the present application. Figure 2b for Figure 2a A circuit element structure diagram of a broadband power amplifier circuit 100 is provided.

[0042] In one embodiment, the single-frequency signal processing circuit 10 includes a first signal processing sub-circuit 11 and a second signal processing sub-circuit 12 , and the plurality of signal processing devices 30 include a first circulator 31 and a second circulator 32 .

[0043] The first circulator 31 is connected to the dual-frequency signal processing circuit 20 and the first signal processing sub-circuit 11 , and the second circulator 32 is connected to the dual-frequency signal processing circuit 20 and the second signal processing sub-circuit 12 .

[0044] During the implementation process, the dual-frequency signal is input into the first signal processing sub-circuit 11 and the second signal processing sub-circuit 12. The first signal processing sub-circuit 11 is used to perform signal separation from the input dual-frequency signal to obtain a first single-frequency signal, and to power amplify the first single-frequency signal to obtain a first amplified single-frequency signal. For example, the dual-frequency signal F1+F2 is separated to obtain a first single-frequency signal F1, and the first single-frequency signal is power amplified to obtain a first amplified single-frequency signal F1'.

[0045] It should be understood that in the second signal processing sub-circuit 12, signal separation is performed on the input dual-frequency signal to obtain the second single-frequency signal F2, and the second single-frequency signal is power amplified to obtain the second amplified single-frequency signal F2'.

[0046] The first circulator 31 is used to receive the target dual-frequency signal, perform signal separation processing on the target dual-frequency signal to obtain a first separated single-frequency signal corresponding to the first amplified single-frequency signal, and perform power synthesis processing on the first separated single-frequency signal and the first amplified single-frequency signal to obtain a first target single-frequency signal. For example, the target dual-frequency signal is subjected to signal separation processing to obtain a first separated single-frequency signal F1', and the first separated single-frequency signal F1' is subjected to power synthesis processing with the first amplified single-frequency signal F1 to obtain a first target single-frequency signal F1 * .

[0047] It should be understood that the second circulator 32 is used to perform signal separation on the target dual-frequency signal to obtain a second separated single-frequency signal F2'' corresponding to the second amplified single-frequency signal, and to perform power synthesis processing on the second separated single-frequency signal F2'' and the second amplified single-frequency signal F2' to obtain the second target single-frequency signal F2 * .

[0048] Through the first signal processing subcircuit 11, the second signal processing subcircuit 12, and the first circulator 31 connected to the dual-frequency signal processing circuit 20 and the first signal processing subcircuit 11, and the second circulator 32 connected to the dual-frequency signal processing circuit 20 and the second signal processing subcircuit 12, the dual-frequency signal is separated to obtain two single-frequency signals, and the two single-frequency signals are amplified and processed to obtain corresponding amplified single-frequency signals respectively. At the same time, the dual-frequency signal is amplified and processed and then separated to obtain a separated single-frequency signal, and the amplified single-frequency signal and the corresponding separated single-frequency signal are power-synthesized to obtain the corresponding target single-frequency signal. The narrowband matching of the first signal processing subcircuit 11 and the second signal processing subcircuit 12 can effectively improve the efficiency of the power amplifier when working at rated power, and reduce the power and efficiency losses caused by broadband matching and broadband power synthesis. At the same time, the circulator is used for power synthesis, so that the dual-frequency signal processing circuit 20 does not have the shutdown problem after joining the link, thereby improving the efficiency of the power amplifier.

[0049] Please continue reading Figure 2a and Figure 2b In one embodiment, when the relative bandwidth of the single-frequency signal transmitted by the signal processing subcircuit is less than or equal to the first bandwidth threshold, the input end of the circulator is connected to the signal processing subcircuit, and the isolation end of the circulator is connected to the dual-frequency signal processing circuit 20.

[0050] Exemplarily, the circulator includes an input end, an output end and an isolation end. When the relative bandwidth of the single-frequency signal transmitted by the signal processing subcircuit is less than or equal to the first bandwidth threshold, the circulator is connected to the broadband power amplifier circuit 100 in the form of the input end connected to the signal processing subcircuit and the isolation end connected to the dual-frequency signal processing circuit 20.

[0051] The first bandwidth threshold is 5%.

[0052] In the specific implementation process, taking the single-frequency signal processing circuit 10 including the first signal processing sub-circuit 11 and the second signal processing sub-circuit 12 as an example, the relative bandwidth of the first single-frequency signal transmitted in the first signal processing sub-circuit 11 and the second single-frequency signal transmitted in the second signal processing sub-circuit 12 are both less than or equal to the first bandwidth threshold, the first circulator 31 is a forward-rotating circulator, and the second circulator 32 is a reverse-rotating circulator. The forward-rotating circulator is used to connect the dual-frequency signal processing circuit 20 and the first signal processing sub-circuit 11, and the reverse-rotating circulator is used to connect the dual-frequency signal processing circuit 20 and the second signal processing sub-circuit 12.

[0053] It can be understood that since in the actual circuit layout, the dual-frequency signal processing circuit 20 is located between the first signal processing sub-circuit 11 and the second signal processing sub-circuit 12, in order to prevent the circuit routing from crossing, a derotating circulator is used to connect the dual-frequency signal processing circuit 20 and the second signal processing sub-circuit 12.

[0054] See also Figure 3a and Figure 3b , Figure 3a and Figure 3b This is a schematic structural diagram of a broadband power amplifier circuit 100 provided in another embodiment of the present application. Figure 3b for Figure 3a A circuit element structure diagram of a broadband power amplifier circuit 100 is provided.

[0055] In one embodiment, when the relative bandwidth of the single-frequency signal transmitted by the signal processing subcircuit is greater than or equal to the second bandwidth threshold, the isolation end of the circulator is connected to the signal processing subcircuit, and the input end of the circulator is connected to the dual-frequency signal processing circuit 20.

[0056] Exemplarily, the second bandwidth threshold is 7%. When the relative bandwidth of the single-frequency signal is greater than or equal to the second bandwidth threshold, for example, when the signal processing subcircuit is used to transmit and amplify a single-frequency signal with a relative bandwidth of 7% to 20%, the isolation end of the circulator is connected to the signal processing subcircuit, and the input end of the circulator is connected to the dual-frequency signal processing circuit 20.

[0057] In the specific implementation process, Figure 3a and Figure 3b As shown, taking the single-frequency signal processing circuit 10 including the first signal processing sub-circuit 11 and the second signal processing sub-circuit 12 as an example, the dual-frequency signal processing circuit 20 is located between the first signal processing sub-circuit 11 and the second signal processing sub-circuit 12. In order to prevent the circuit wiring from crossing, the dual-frequency signal processing circuit 20 and the first signal processing sub-circuit 11 are connected by a reverse circulator, and the dual-frequency signal processing circuit 20 and the second signal processing sub-circuit 12 are connected by a forward circulator. It can be understood that the reverse circulator and the forward circulator are both connected to the dual-frequency signal processing circuit 20 at the input end, and the isolation end is connected to the corresponding signal processing sub-circuit.

[0058] See also Figure 4a and Figure 4b , Figure 4a This is a schematic structural diagram of a broadband power amplifier circuit 100 provided in yet another embodiment of the present application. Figure 4b for Figure 4a A circuit element structure diagram of a broadband power amplifier circuit 100 is provided.

[0059] Exemplarily, when the relative bandwidth of the first single-frequency signal is less than or equal to the first bandwidth threshold and the relative bandwidth of the second single-frequency signal is greater than or equal to the second bandwidth threshold, the first signal processing subcircuit 11 and the dual-frequency signal processing circuit 20 are connected using a forward-rotating circulator, and the second signal processing subcircuit 12 and the dual-frequency signal processing circuit 20 are connected using a forward-rotating circulator. It can be understood that the access method of the circulator is the same as that provided in the previous embodiments, and will not be repeated here.

[0060] In a specific implementation, each signal processing subcircuit includes a power amplifier unit, wherein the power amplifier unit includes an input matching network component, a power amplifier tube, a power supply network component, and an output matching network component, and each component is connected to communicate with each other to realize power amplification processing of the input single-frequency signal, wherein the difference between the working frequency band of the power amplifier unit and the frequency band of the input single-frequency signal is less than or equal to the preset frequency band difference, so that the power amplifier unit matches the input single-frequency signal and can perform power amplification processing on the input single-frequency signal. Specifically, the input matching network component and the output matching network component in the power amplifier unit are respectively used to realize the matching of the root of the power amplifier tube to the 50-ohm system, which can be realized by adding capacitors to microstrip lines.

[0061] It should be understood that the dual-frequency signal processing circuit 20 also includes a power amplifier unit. The power amplifier unit in the dual-frequency signal processing circuit 20 has the same structure as the power amplifier unit in the signal processing subcircuit. The power amplifier unit in the dual-frequency signal processing circuit 20 matches the frequency band of the transmitted dual-frequency signal.

[0062] It should be noted that each signal processing sub-circuit also includes a frequency separation unit, such as Figure 2b , Figure 3b , Figure 4b The first signal processing subcircuit 11 includes a first frequency separation unit 111, and the second signal processing subcircuit 12 includes a second frequency separation unit 121. It can be understood that the first end of the frequency separation unit is used to receive the dual-frequency signal, and the second end of the frequency separation unit is connected to the power amplifier unit in each circuit, wherein the first signal processing subcircuit 11 also includes a first power amplifier unit PA1, the second signal processing subcircuit 12 also includes a second power amplifier unit PA2, and the dual-frequency signal processing circuit 20 includes a third power amplifier unit PA3. The frequency separation unit is used to separate the dual-frequency signal to obtain a single-frequency signal, and the power amplifier unit is used to amplify the signal in each path. Specifically, the frequency separation unit is composed of a microstrip splitter and an integrated filter, and can also be composed of a bridge and a filter, which is not limited in this application.

[0063] In one embodiment, the difference between the working frequency band of the circulator and the frequency band of the single-frequency signal transmitted in the signal processing subcircuit connected to the circulator is less than or equal to a preset frequency band difference threshold.

[0064] Exemplarily, the operating frequency band of the circulator matches the frequency band of the single-frequency signal transmitted in the signal processing subcircuit of the connected circulator to separate the separated single-frequency signal corresponding to the amplified single-frequency signal from the target dual-frequency signal.

[0065] Exemplarily, the frequency band isolation between the plurality of signal processing devices 30 is greater than or equal to a preset isolation threshold. For example, there is an isolation of more than 20 dB between the first circulator 31 and the second circulator 32 provided in the above embodiment.

[0066] See also Figure 5 , Figure 5 A schematic structural diagram of a broadband power amplifier circuit 100 provided in another embodiment of the present application.

[0067] In one embodiment, the signal processing device 30 includes a filter 33 and a synthesis network component 34; the input end of the filter 33 is connected to the dual-frequency signal processing circuit 20, the output end of the filter 33 is connected to the first input end of the synthesis network component 34, and the second input end of the synthesis network component 34 is connected to the amplified single-frequency signal output by the single-frequency signal processing circuit 10; the filter 33 is used to perform signal separation processing on the target dual-frequency signal output by the dual-frequency signal processing circuit 20 to obtain a separated single-frequency signal corresponding to the amplified single-frequency signal; the synthesis network component 34 is used to perform power synthesis processing on the amplified single-frequency signal and the separated single-frequency signal to obtain the target single-frequency signal.

[0068] Exemplarily, in addition to using a circulator, the dual-frequency signal can be separated by a filter 33 and a synthesis network component 34, and the separated single-frequency signal obtained from the dual-frequency signal and the corresponding amplified single-frequency signal can be power synthesized to obtain a target single-frequency signal.

[0069] In the specific implementation process, the filter 33 realizes the separation of the target dual-frequency signal to obtain a separated single-frequency signal corresponding to one amplified single-frequency signal. The synthesis network component 34 is used to perform power synthesis processing on the amplified single-frequency signal and the separated single-frequency signal corresponding to the amplified single-frequency signal to obtain the corresponding target single-frequency signal.

[0070] See also Figure 6a and Figure 6b , Figure 6a This is a schematic structural diagram of a broadband power amplifier circuit 100 provided in yet another embodiment of the present application. Figure 6b for Figure 6a A circuit element structure diagram of a broadband power amplifier circuit 100 is provided.

[0071] The single-frequency signal processing circuit 10 includes a first signal processing sub-circuit 11 and a second signal processing sub-circuit 12; the multiple filters 33 include a first filter 331 and a second filter 332; the multiple synthesis network components 34 include a first bridge 341 and a second bridge 342; the dual-frequency signal processing circuit 20 is connected to the input end of the first filter 331 and the input end of the second filter 332, the output end of the first filter 331 is connected to the first end of the first bridge 341, and the second end of the first bridge 341 is connected to the first signal processing sub-circuit 11; the output end of the second filter 332 is connected to the first end of the second bridge 342, and the second end of the second bridge 342 is connected to the second signal processing sub-circuit 12.

[0072] Among them, the first signal processing sub-circuit 11 is used to perform signal separation from the dual-frequency signal to obtain a first single-frequency signal, and to perform power amplification processing on the first single-frequency signal to obtain a first amplified single-frequency signal. The first filter 331 is used to perform signal separation processing on the target dual-frequency signal output by the dual-frequency signal processing circuit 20 to obtain a first separated single-frequency signal corresponding to the first amplified single-frequency signal; the first bridge 341 is used to perform power synthesis processing on the first amplified single-frequency signal and the first separated single-frequency signal to obtain a first target single-frequency signal.

[0073] The second signal processing sub-circuit 12 is used to perform signal separation from the dual-frequency signal to obtain a second single-frequency signal, and to perform power amplification processing on the second single-frequency signal to obtain a second amplified single-frequency signal; the second filter 332 is used to perform signal separation processing on the target dual-frequency signal output by the dual-frequency signal processing circuit 20 to obtain a second separated single-frequency signal corresponding to the second amplified single-frequency signal, and the second bridge 342 is used to perform power synthesis processing on the second amplified single-frequency signal and the second separated single-frequency signal to obtain a second target single-frequency signal; the difference between the signal frequency of the second single-frequency signal and the signal frequency of the first single-frequency signal is greater than or equal to the frequency difference threshold.

[0074] In a specific implementation, the first filter 331 separates the first separated single-frequency signal from the target dual-frequency signal and outputs it to the first bridge 341, so that the first bridge 341 receives the first separated single-frequency signal and the first amplified single-frequency signal, and the first bridge 341 performs power synthesis processing on the first separated single-frequency signal and the first amplified single-frequency signal to obtain the corresponding first target single-frequency signal. It should be understood that the second filter 332 separates the second separated single-frequency signal from the target dual-frequency signal and outputs it to the second bridge 342, so that the second bridge 342 receives the second separated single-frequency signal and the second amplified single-frequency signal, and the second bridge 342 performs power synthesis processing on the second separated single-frequency signal and the second amplified single-frequency signal to obtain the corresponding second target single-frequency signal.

[0075] It should be noted that the first end of the first bridge 341 is the input end of the first bridge 341, the second end of the first bridge 341 is the first output end of the first bridge 341, the first end of the second bridge 342 is the input end of the second bridge 342, the second end of the second bridge 342 is the first output end of the second bridge 342, and the second output end of the first bridge 341 and / or the output end of the second bridge 342 are also used to connect a matching load to achieve isolation of the first signal processing sub-circuit 11 and the second signal processing sub-circuit 12.

[0076] Narrowband matching is achieved through the first signal processing subcircuit 11 and the second signal processing subcircuit 12 in the single-frequency signal processing circuit 10, and broadband matching is achieved by the dual-frequency signal processing circuit 20. In addition, signal processing devices 30 such as circulators, filters and bridges are used to achieve power synthesis during power synthesis, thereby reducing the power and efficiency losses caused by broadband matching and broadband power synthesis. In addition, narrowband matching can effectively improve the efficiency of the power amplifier when working at rated power. At the same time, broadband matching is achieved through the dual-frequency signal processing circuit 20 to meet the multi-band power sharing output of the system, and power synthesis is performed by using signal processing devices 30 such as circulators, so that the power amplification unit in the dual-frequency signal processing circuit 20 does not have the problem of shutting down after joining the link, thereby improving the rated efficiency of the power amplifier.

[0077] See also Figure 7 , Figure 7 A schematic diagram of the structure of a multi-band co-transmitting RRU circuit provided in one embodiment of the present application.

[0078] The multi-band co-transmitting RRU circuit is applied to the active antenna unit of the communication base station, such as Figure 7 As shown, the multi-band co-transmitting RRU circuit includes a broadband power amplifier circuit 100, a radio frequency signal amplifying circuit 200, a filtering circuit 300 and an antenna assembly 400. The radio frequency signal amplifying circuit 200 is connected to the filtering circuit 300 through the broadband power amplifier circuit 100, and the filtering circuit 300 is also connected to the antenna assembly 400, wherein the broadband power amplifier circuit 100 is the broadband power amplifier circuit 100 provided in any of the foregoing embodiments.

[0079] See also Figure 8 , Figure 8 A flowchart of the steps of a signal processing method provided in one embodiment of the present application.

[0080] like Figure 8 As shown, the signal processing method includes steps S101 to S104.

[0081] Step S101: receiving an input dual-frequency signal.

[0082] Step S102: performing signal separation from the dual-frequency signal to obtain two single-frequency signals, and performing power amplification processing on each single-frequency signal to obtain an amplified single-frequency signal corresponding to each single-frequency signal.

[0083] Step S103: perform power amplification processing on the dual-frequency signal to obtain a target dual-frequency signal.

[0084] Step S104: according to the connection relationship between the signal processing device in the broadband power amplifier circuit and the single-frequency signal processing circuit, the target dual-frequency signal output by the dual-frequency signal processing circuit is subjected to signal separation processing to obtain a separated single-frequency signal corresponding to the amplified single-frequency signal; and the amplified single-frequency signal and the separated single-frequency signal corresponding to the amplified single-frequency signal are subjected to power synthesis processing to obtain the target single-frequency signal.

[0085] It should be noted that the signal processing method provided in the present application is applied to any embodiment of the broadband power amplifier circuit described above. The specific implementation process can refer to the embodiments of the broadband power amplifier circuit described above, and will not be repeated here.

[0086] It should be understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations. It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "including a..." does not exclude the presence of other identical elements in the process, method, article or system including the element.

[0087] The above application serial numbers are only for description and do not represent the advantages and disadvantages of the embodiments. The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A broadband power amplifier circuit, characterized in that: The broadband power amplifier circuit comprises: The single-frequency signal processing circuit is used to receive an input dual-frequency signal, perform signal separation from the dual-frequency signal to obtain two single-frequency signals, and perform power amplification processing on each of the single-frequency signals to obtain an amplified single-frequency signal corresponding to each of the single-frequency signals; A dual-frequency signal processing circuit, used for performing power amplification processing on the dual-frequency signal to obtain a target dual-frequency signal; A plurality of signal processing devices are respectively connected to the dual-frequency signal processing circuit and the amplified single-frequency signal output by the single-frequency signal processing circuit, and are used to perform signal separation processing on the target dual-frequency signal to obtain a separated single-frequency signal corresponding to the amplified single-frequency signal; and perform power synthesis processing on the amplified single-frequency signal and the separated single-frequency signal to obtain the target single-frequency signal.

2. The broadband power amplifier circuit according to claim 1, characterized in that: The single-frequency signal processing circuit includes a plurality of signal processing sub-circuits, each of which corresponds to one amplified single-frequency signal. The signal processing device includes a circulator, each of which is connected to the dual-frequency signal processing circuit and one of the signal processing sub-circuits in the single-frequency signal processing circuit.

3. The broadband power amplifier circuit according to claim 2, characterized in that: When the relative bandwidth of the single-frequency signal transmitted by the signal processing subcircuit is less than or equal to the first bandwidth threshold, the input end of the circulator is connected to the signal processing subcircuit, and the isolation end of the circulator is connected to the dual-frequency signal processing circuit.

4. The broadband power amplifier circuit according to claim 2, characterized in that: When the relative bandwidth of the single-frequency signal transmitted by the signal processing subcircuit is greater than or equal to the second bandwidth threshold, the isolation end of the circulator is connected to the signal processing subcircuit, and the input end of the circulator is connected to the dual-frequency signal processing circuit.

5. The broadband power amplifier circuit according to claim 2, characterized in that: The difference between the working frequency band of the circulator and the frequency band of the single-frequency signal transmitted in the signal processing subcircuit connected to the circulator is less than or equal to a preset frequency band difference threshold.

6. The broadband power amplifier circuit according to claim 2, characterized in that: The single-frequency signal processing circuit includes a first signal processing subcircuit and a second signal processing subcircuit, and the plurality of signal processing devices include a first circulator and a second circulator; the first circulator is connected to the first signal processing subcircuit and the dual-frequency signal processing circuit, and the second circulator is connected to the second signal processing subcircuit and the dual-frequency signal processing circuit; The first signal processing subcircuit is used to perform signal separation from the dual-frequency signal to obtain a first single-frequency signal, and to perform power amplification processing on the first single-frequency signal to obtain a first amplified single-frequency signal; The second signal processing subcircuit is used to perform signal separation from the dual-frequency signal to obtain a second single-frequency signal, and to perform power amplification processing on the second single-frequency signal to obtain a second amplified single-frequency signal, wherein the difference between the signal frequency of the second single-frequency signal and the signal frequency of the first single-frequency signal is greater than or equal to a frequency difference threshold; The first circulator is used to perform signal separation processing on the target dual-frequency signal output by the dual-frequency signal processing circuit to obtain a first separated single-frequency signal corresponding to the first amplified single-frequency signal, and perform power synthesis processing on the first separated single-frequency signal and the first amplified single-frequency signal to obtain a first target single-frequency signal; The second circulator is used to perform signal separation processing on the target dual-frequency signal output by the dual-frequency signal processing circuit to obtain a second separated single-frequency signal corresponding to the second amplified single-frequency signal, and to perform power synthesis processing on the second separated single-frequency signal and the second amplified single-frequency signal to obtain a second target single-frequency signal.

7. The broadband power amplifier circuit according to claim 1, characterized in that: The signal processing device comprises a filter and a synthesis network component; the input end of the filter is connected to the dual-frequency signal processing circuit, the output end of the filter is connected to the first input end of the synthesis network component, and the second input end of the synthesis network component is connected to an amplified single-frequency signal output by the single-frequency signal processing circuit; The filter is used to perform signal separation processing on the target dual-frequency signal output by the dual-frequency signal processing circuit to obtain a separated single-frequency signal corresponding to the amplified single-frequency signal; the synthesis network component is used to perform power synthesis processing on the amplified single-frequency signal and the separated single-frequency signal to obtain the target single-frequency signal.

8. The broadband power amplifier circuit according to claim 7, characterized in that: The single-frequency signal processing circuit includes a first signal processing subcircuit and a second signal processing subcircuit; the plurality of filters include a first filter and a second filter; the plurality of synthesis network components include a first bridge and a second bridge; the dual-frequency signal processing circuit is connected to an input end of the first filter and an input end of the second filter; the output end of the first filter is connected to a first end of the first bridge, and a second end of the first bridge is connected to the first signal processing subcircuit; the output end of the second filter is connected to a first end of the second bridge, and a second end of the second bridge is connected to the second signal processing subcircuit; The first signal processing subcircuit is used to perform signal separation from the dual-frequency signal to obtain a first single-frequency signal, and to perform power amplification processing on the first single-frequency signal to obtain a first amplified single-frequency signal; the first filter is used to perform signal separation processing on the target dual-frequency signal output by the dual-frequency signal processing circuit to obtain a first separated single-frequency signal corresponding to the first amplified single-frequency signal; the first bridge is used to perform power synthesis processing on the first amplified single-frequency signal and the first separated single-frequency signal to obtain a first target single-frequency signal; The second signal processing sub-circuit is used to perform signal separation from the dual-frequency signal to obtain a second single-frequency signal, and to perform power amplification processing on the second single-frequency signal to obtain a second amplified single-frequency signal; the second filter is used to perform signal separation processing on the target dual-frequency signal output by the dual-frequency signal processing circuit to obtain a second separated single-frequency signal corresponding to the second amplified single-frequency signal; the second bridge is used to perform power synthesis processing on the second amplified single-frequency signal and the second separated single-frequency signal to obtain a second target single-frequency signal; the difference between the signal frequency of the second single-frequency signal and the signal frequency of the first single-frequency signal is greater than or equal to a frequency difference threshold.

9. A multi-band co-transmitting RRU circuit, characterized in that: An active antenna unit applied to a communication base station, the multi-band co-transmitting RRU circuit includes a radio frequency signal amplification circuit, a broadband power amplifier circuit, a filter circuit and an antenna assembly; the radio frequency signal amplification circuit is connected to the filter circuit via the broadband power amplifier circuit, and the filter circuit is also connected to the antenna assembly, wherein the broadband power amplifier circuit is the broadband power amplifier circuit described in any one of claims 1 to 8.

10. A signal processing method, characterized in that: Applied to the broadband power amplifier circuit according to any one of claims 1 to 8, the method comprising: receiving an input dual-frequency signal; Separating the dual-frequency signal to obtain two single-frequency signals, and performing power amplification processing on each of the single-frequency signals to obtain an amplified single-frequency signal corresponding to each of the single-frequency signals; Performing power amplification processing on the dual-frequency signal to obtain a target dual-frequency signal; According to the connection relationship between the signal processing device in the broadband power amplifier circuit and the single-frequency signal processing circuit, the target dual-frequency signal output by the dual-frequency signal processing circuit is subjected to signal separation processing to obtain a separated single-frequency signal corresponding to the amplified single-frequency signal; and the amplified single-frequency signal and the separated single-frequency signal corresponding to the amplified single-frequency signal are subjected to power synthesis processing to obtain a target single-frequency signal.

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