Remote radio apparatus and base station

Abstract

Provided in the present application are a remote radio apparatus and a base station. The remote radio apparatus comprises at least one first voltage conversion unit, at least one second voltage conversion unit and a radio frequency power amplification circuit; each first voltage conversion unit is used for converting an input negative voltage into a positive voltage; each second voltage conversion unit is used for converting a voltage outputted by the first voltage conversion unit; each first voltage conversion unit comprises a plurality of output ends, each output end being correspondingly connected to a different power conversion circuit in the first voltage conversion unit; and at least one output end of the first voltage conversion unit is connected to the radio frequency power amplification circuit via the second voltage conversion unit. Each power conversion circuit in each first voltage conversion unit can be independently shut down, so that the number of the power conversion circuits that need to operate can be flexibly configured on the basis of requirements of radio frequency power amplification circuits, thus reducing the energy loss.

Description

Radio frequency remote device and base station Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to a radio remote device and a base station. Background Art

[0002] With the rapid development of wireless communications, especially the advent of fifth-generation mobile communications, distributed power supply architectures are becoming increasingly widespread. In this architecture, remote radio units (RRUs) are located away from the communications equipment room. These RRUs contain multiple RF power amplifiers, and one of the challenges is how to configure power supply circuits within these RRUs to power these RF power amplifiers.

[0003] Summary of the Invention

[0004] The present application provides a radio frequency remote device and a base station. The radio frequency remote device includes at least one first voltage conversion unit and a radio frequency power amplifier circuit. Each power conversion circuit in the first voltage conversion unit supports independent shutdown, so that the number of power conversion circuits that need to work can be flexibly configured based on the requirements of the radio frequency power amplifier circuit, thereby reducing energy loss.

[0005] In a first aspect, embodiments of the present application provide a remote radio frequency device, comprising at least one first voltage conversion unit, at least one second voltage conversion unit, and a radio frequency power amplifier circuit. Each first voltage conversion unit is configured to convert an input negative voltage into a positive voltage, and each second voltage conversion unit is configured to convert the voltage output by the first voltage conversion unit. Each first voltage conversion unit includes multiple output terminals, each output terminal correspondingly connected to a different power conversion circuit in the first voltage conversion unit, and at least one output terminal of the first voltage conversion unit is connected to the radio frequency power amplifier circuit via the second voltage conversion unit.

[0006] The output ends of the first voltage conversion unit provided in the embodiment of the present application correspond to different power conversion circuits. Therefore, each output end can output current independently by controlling each power conversion circuit. This allows the number of power conversion circuits that need to work to be flexibly configured based on the power requirements of the radio frequency power amplifier circuit, thereby improving the flexibility of energy distribution and reducing energy loss.

[0007] In combination with the first aspect, in one possible design, one part of the multiple output ends of the first voltage conversion unit is connected to the RF power amplifier circuit, and another part of the multiple output ends of the first voltage conversion unit is connected to the RF power amplifier circuit through the second voltage conversion unit.

[0008] Since each power conversion circuit can be turned off independently, the number of power conversion circuits that need to work can be flexibly configured according to the change in the power demand of the radio frequency power amplifier circuit. In addition, especially when the power required by the radio frequency power amplifier circuit becomes less, part of the power conversion circuit or the second voltage conversion unit can be controlled to be turned off, thereby reducing energy loss. In addition, since part of the output ends of the multiple output ends corresponding to the power conversion circuit included in the first voltage conversion unit are directly connected to the radio frequency power amplifier circuit, it is only necessary to perform one voltage conversion on the electric energy input by the first voltage conversion unit to supply power to the radio frequency power amplifier circuit. One voltage conversion only consumes one power, while the existing power supply architecture requires two voltage conversions, and two voltage conversions have two power consumptions, which increases power consumption. Therefore, compared with the power supply architecture that requires two voltage conversions, the present application can improve the voltage conversion efficiency.

[0009] In conjunction with the first aspect, in one possible design, one of the output ends of the plurality of output ends of the first voltage conversion unit is connected to the radio frequency power amplifier circuit, including: at least two output ends of the output end of the plurality of output ends are connected in parallel to the radio frequency power amplifier circuit; or, each output end of the output end of the plurality of output ends is connected to the radio frequency power amplifier circuit in a one-to-one correspondence. Thus, the number of power conversion circuits connected to the radio frequency power amplifier circuit can be configured based on the maximum power required by the radio frequency power amplifier circuit. In addition, since at least two output ends of the output end of the plurality of output ends corresponding to the power conversion circuit are directly connected to the radio frequency power amplifier circuit, the electric energy input by the first voltage conversion unit only needs to be converted into voltage once to supply power to the radio frequency power amplifier circuit. Only one power consumption is consumed for each voltage conversion, thereby improving the voltage conversion efficiency.

[0010] In conjunction with the first aspect, in one possible design, another portion of the multiple output terminals of the first voltage conversion unit are connected to the RF power amplifier circuit via the second voltage conversion unit. This includes: each output terminal of the other portion of the multiple output terminals is connected in a one-to-one correspondence with the second voltage conversion unit, and the output terminals of the second voltage conversion unit are connected in a one-to-one correspondence with the RF power amplifier circuit; or, at least two output terminals of the other portion of the multiple output terminals are connected in parallel to the second voltage conversion unit, and the output terminals of the second voltage conversion unit are connected in a one-to-one correspondence with the RF power amplifier circuit. The second voltage conversion unit can perform voltage conversion on the electrical energy output by the first conversion unit. This allows the output power of the second voltage conversion unit and the output power of the power conversion circuit connected to the second voltage conversion unit to be flexibly adjusted based on the power of the RF power amplifier circuit, thereby improving power distribution flexibility.

[0011] In conjunction with the first aspect, in one possible design, each of the multiple output terminals of the first voltage conversion unit is connected to a second voltage conversion unit in a one-to-one correspondence, and the output terminals of the second voltage conversion unit are connected to the RF power amplifier circuit in a one-to-one correspondence. The second voltage conversion unit can perform voltage conversion on the electrical energy output by the first conversion unit, thereby flexibly adjusting the output power of the second voltage conversion unit and the output power of the power conversion circuit connected to the second voltage conversion unit based on the power of the RF power amplifier circuit, thereby improving power distribution flexibility.

[0012] In combination with the first aspect, in one possible design, each first voltage conversion unit includes a first control unit, which is used to disconnect or connect multiple power conversion circuits in the first voltage conversion unit according to the power required by the radio frequency power amplification circuit.

[0013] The first control unit can flexibly control the number of power conversion circuits required to operate among the power conversion circuits connected to the RF power amplifier circuit based on changes in the power demand of the RF power amplifier circuit. Furthermore, each first voltage conversion unit includes a first control unit, and each first control unit operates independently. Even if a first control unit fails, it will not affect the operation of other first control units, thereby reducing system coupling.

[0014] In combination with the first aspect, in one possible design, the radio remote device further includes a centralized control unit, which is configured to disconnect or connect multiple power conversion circuits of each first voltage conversion unit according to the power required by the radio frequency power amplification circuit.

[0015] The centralized control unit can flexibly control the number of power conversion circuits connected to the RF power amplifier circuit that need to operate according to the power demand of the RF power amplifier circuit. In addition, the RF remote device includes a centralized control unit, which has a high degree of integration and low cost.

[0016] In conjunction with the first aspect, in one possible design, each first voltage conversion unit includes a first control unit, and each second voltage conversion unit includes a second control unit. The first control unit is configured to obtain the voltage required by the radio frequency power amplifier circuit connected to the first voltage conversion unit, and the second control unit is configured to obtain the voltage required by the radio frequency power amplifier circuit connected to the second voltage conversion unit. The first control unit is configured to control the output voltage of the power conversion circuit connected to the second voltage conversion unit based on the voltage, and the second control unit is configured to control the output voltage of the second voltage conversion unit based on the voltage.

[0017] The first control unit and the second control unit can jointly regulate the voltage based on the voltage required by the RF power amplifier circuit. Specifically, they can separately control the output voltage of the power conversion circuit connected to the second voltage conversion unit and the output voltage of the second voltage conversion unit connected to the RF power amplifier circuit based on the voltage required by the RF power amplifier circuit. This can improve the voltage conversion efficiency of the first voltage conversion unit and the voltage conversion efficiency of the second voltage conversion unit, thereby reducing losses. In addition, each first control unit independently controls a first voltage conversion unit, and each second control unit independently controls a second voltage conversion unit. Each control unit operates independently, and even if a control unit fails, it will not affect the operation of the other control units, thereby reducing the coupling of the system.

[0018] In combination with the first aspect, in one possible design, the radio frequency remote device includes a centralized control unit; the centralized control unit is used to obtain the voltage required by the radio frequency power amplifier circuit; and control the output voltage of the second voltage conversion unit connected to the radio frequency power amplifier circuit and the output voltage of the power conversion circuit connected to the second voltage conversion unit according to the voltage required by the radio frequency power amplifier circuit.

[0019] The centralized control unit can control the output voltage of a second voltage conversion unit connected to the RF power amplifier circuit, as well as the output voltage of a power conversion circuit connected to the second voltage conversion unit, based on the voltage required by the RF power amplifier circuit. This improves the voltage conversion efficiency of both the first and second voltage conversion units, thereby reducing losses. Furthermore, the inclusion of a centralized control unit in the remote radio frequency device offers a high level of integration and low cost.

[0020] In conjunction with the first aspect, in one possible design, each power conversion circuit includes two power switches connected in series, an inductor, and two capacitors. One end of the two power switches connected in series is connected to one end of one capacitor, the other end of the two power switches connected in series is connected to one end of another capacitor, and the series connection point of the two power switches connected in series is connected to one end of the inductor; the other ends of the two capacitors and the other ends of the inductors are connected to each other; and the other ends of the two power switches connected in series and the other ends of the capacitors serve as output ends of the power conversion circuit.

[0021] In conjunction with the first aspect, in one possible design, the first voltage conversion unit further includes an inverter circuit and a transformer, the transformer including multiple secondary windings. The output end of the inverter circuit is connected to the primary winding of the transformer, and the multiple secondary windings are connected to the multiple power conversion circuits in a one-to-one correspondence.

[0022] In combination with the first aspect, in one possible design, one end of a switching tube in any power conversion circuit is connected to one end of the secondary winding, one end of the other switching tube is connected to the other end of the secondary winding, the other ends of the two switching tubes are connected to one end of the filter inductor, the other end of the filter inductor is connected to one end of the filter capacitor, and the other end of the filter capacitor is connected to the center tap of the secondary winding; the other end of the filter inductor and one end of the filter capacitor are the output ends of the power conversion circuit.

[0023] In combination with the first aspect, in one possible design, the second voltage conversion unit includes: a Buck circuit, or a Boost circuit, or a Buck-Boost circuit.

[0024] In a second aspect, the present application provides a remote radio frequency device, comprising at least one first voltage conversion unit and a radio frequency power amplifier circuit, wherein each first voltage conversion unit is configured to convert an input negative voltage into a positive voltage. Each first voltage conversion unit includes multiple output terminals, each output terminal correspondingly connected to a different power conversion circuit in the first voltage conversion unit, and at least two output terminals of the first voltage conversion unit are connected in parallel to the radio frequency power amplifier circuit.

[0025] In the embodiment of the present application, since multiple output terminals corresponding to different power conversion circuits are directly connected to the RF power amplification circuit after being connected in parallel, and each power conversion circuit can be independently shut down, the number of power conversion circuits that need to work can be configured according to the power demand changes of the RF power amplifier circuit, thereby improving the flexibility of energy distribution and reducing energy loss.

[0026] In combination with the second aspect, in a possible design, at least two output terminals of the first voltage conversion unit are connected in parallel to the radio frequency power amplifier circuit, including: one part of the multiple output terminals of the first voltage conversion unit are connected in parallel to the radio frequency power amplifier circuit, and another part of the multiple output terminals of the first voltage conversion unit are connected in parallel to the radio frequency power amplifier circuit through the second voltage conversion unit.

[0027] In a third aspect, the present application provides a voltage conversion device, comprising at least one first voltage conversion unit and at least one second voltage conversion unit, wherein each second voltage conversion unit is configured to convert a voltage output by the first voltage conversion unit. Each first voltage conversion unit includes multiple output terminals, each output terminal corresponding to a different power conversion circuit in the first voltage conversion unit, and at least one output terminal of the first voltage conversion unit is configured to be connected to a load via the second voltage conversion unit.

[0028] In combination with the third aspect, in one possible design, a portion of the multiple output ends of the first voltage conversion unit is used to connect to the load, and another portion of the multiple output ends of the first voltage conversion unit is used to connect to the load through the second voltage conversion unit.

[0029] In combination with the third aspect, in a possible design, each of the multiple output ends of the first voltage conversion unit is connected to the second voltage conversion unit in a one-to-one correspondence, and the output end of the second voltage conversion unit is used to connect to a load.

[0030] In a fourth aspect, the present application provides a base station, comprising the radio remote device, antenna and baseband unit in the first aspect or the second aspect above, wherein the radio remote device and the baseband unit transmit signals to each other, and the signals are transmitted through the antenna.

[0031] The technical effects brought about by the third and fourth aspects can be referred to the technical effects brought about by different designs in the first or second aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic diagram of a base station provided in an embodiment of the present application.

[0033] FIG2 is a schematic diagram of an architecture for supplying power to wireless powered devices.

[0034] FIG3 is a schematic diagram of a radio remote device provided in an embodiment of the present application.

[0035] FIG4 is a schematic diagram of another radio remote control device provided in an embodiment of the present application.

[0036] FIG5 is a schematic diagram of another radio remote control device provided in an embodiment of the present application.

[0037] FIG6 is a schematic diagram of another radio remote control device provided in an embodiment of the present application.

[0038] FIG7 is a schematic diagram of another radio remote control device provided in an embodiment of the present application.

[0039] FIG8 is a schematic diagram of another radio remote device provided in an embodiment of the present application.

[0040] FIG9 is a schematic diagram of another radio remote device provided in an embodiment of the present application.

[0041] 10A-10D are schematic diagrams of circuit topologies of a first voltage conversion unit according to an embodiment of the present application.

[0042] FIG11A is a schematic diagram of a DC-I distributed power supply architecture.

[0043] FIG11B is a schematic diagram of a DC-C distributed power supply architecture.

[0044] 12A-12C are schematic diagrams of circuit topologies of a second voltage conversion unit provided in an embodiment of the present application.

[0045] FIG13 is a schematic diagram of another base station provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0047] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in this article is merely a way to describe the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0048] In the embodiments of the present application, prefixes such as "first", "second", "third", "fourth", and "fifth" are used only to distinguish different description objects and have no limiting effect on the position, order, priority, quantity, or content of the described objects. In the embodiments of the present application, the use of prefixes such as ordinal numbers to distinguish description objects does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and the use of such prefixes should not constitute an unnecessary limitation. In addition, in the description of this embodiment, unless otherwise specified, the meaning of "multiple" is two or more.

[0049] The positive pole of the 48V power supply output by the power supply unit (PSU) in the communication room is grounded, thereby forming a -48V power supply system to power the equipment. Among them, the grounded positive pole of the power supply serves as the return loop of the power supply current, referred to as RTN (return current). Figure 1 is a schematic diagram of a base station provided by this application. The radio frequency remote device 3 is connected to the baseband unit 4 (bandwidth based unit, BBU) through an optical fiber, and the radio frequency remote device 3 is connected to the antenna 5 through a feeder 6. The radio frequency remote device 3 can receive digital signals and control information from the baseband unit 4, and after modulating the digital signal into a radio frequency signal, the radio frequency power amplifier circuit in the radio frequency remote device 3 amplifies the radio frequency signal and transmits it to the antenna 5. However, the radio frequency remote device works at a positive voltage, and the PSU outputs a negative voltage, so the DC-DC converter in the radio frequency remote device is required to have an inverting function, that is, to convert the input negative voltage into a positive voltage output, thereby powering the radio frequency power amplifier circuit.

[0050] The current architecture for powering RF power amplifiers in base stations is shown in Figure 2. This power supply architecture can convert negative voltage into positive voltage. However, because the isolated or non-isolated inverting open-loop DC-DC converter is connected to each regulated DC-DC converter, it cannot be independently shut down as the power required by the RF power amplifier circuit changes. This results in high energy loss even when the power required by the RF power amplifier circuit decreases. Furthermore, the output voltage of the isolated or non-isolated inverting open-loop DC-DC converter cannot be adjusted accordingly with changes in the voltage required by the RF power amplifier circuit, resulting in low voltage conversion efficiency.

[0051] Based on this, the present application provides a radio frequency remote device, in which each power conversion circuit in the first voltage conversion unit of the radio frequency remote device supports independent shutdown, so that the number of power conversion circuits that need to work can be flexibly configured based on the requirements of the radio frequency power amplifier circuit, thereby reducing energy loss.

[0052] In an embodiment of the present application, the radio frequency remote device includes at least one first voltage conversion unit, at least one second voltage conversion unit and a radio frequency power amplifier circuit, each first voltage conversion unit is used to convert an input negative voltage into a positive voltage, and each second voltage conversion unit is used to convert the voltage output by the first voltage conversion unit.

[0053] In the embodiment of the present application, each first voltage conversion unit can obtain a negative voltage from a negative DC power supply and convert the negative voltage into a positive voltage. The negative DC power supply can be an AC / DC conversion circuit that can convert AC power into negative DC power. The negative DC power supply can also be a battery.

[0054] In an embodiment of the present application, each first voltage conversion unit includes multiple output terminals, each output terminal corresponds to a different power conversion circuit in the first voltage conversion unit, and at least one output terminal of the first voltage conversion unit is connected to the RF power amplifier circuit through the second voltage conversion unit.

[0055] In the embodiment of the present application, each first voltage conversion unit includes multiple output terminals, and each output terminal is connected to a power conversion circuit.

[0056] For any power conversion circuit, the state of the power conversion circuit does not affect the state of other power conversion circuits. For example, one of the first voltage conversion units includes three power conversion circuits, and the conduction or disconnection of these three power conversion circuits does not affect each other. For another example, one of the first voltage conversion units includes three power conversion circuits, and the other first voltage conversion unit includes two power conversion circuits. The state of the power conversion circuit in one of the first voltage conversion units does not affect the state of the power conversion circuit in the other first voltage conversion unit. In other words, each power conversion circuit is independent, and the power conversion circuit in the first voltage conversion unit can be flexibly turned off or on according to the needs of the RF power amplifier circuit.

[0057] In the embodiment of the present application, the main function of the first voltage conversion unit is to convert the polarity of the voltage, such as converting a negative voltage into a positive voltage. The main function of the second voltage conversion unit is to adjust the magnitude of the voltage, such as adjusting the positive voltage output by the first voltage conversion unit.

[0058] In an embodiment of the present application, it is assumed that the radio frequency remote device includes three first voltage conversion units and two second voltage conversion units, and the DC negative voltage obtained by the three first voltage conversion units is -48V. Then, the three first voltage conversion units convert the -48V voltage into a DC positive voltage and respectively input it into the radio frequency power amplifier circuit or the second voltage conversion unit connected to each of them.

[0059] It should be noted that, in addition to converting voltage polarity, the first voltage conversion unit can also convert voltage magnitude. In the above example, the three first voltage conversion units convert a -48V voltage into positive voltages of varying magnitudes. For example, the three first voltage conversion units convert a -48V voltage into +24V, +48V, and +50V.

[0060] The first voltage conversion unit connected to the RF power amplifier circuit inputs the converted positive voltage to the RF power amplifier circuit. The first voltage conversion unit connected to the RF power amplifier circuit via the second voltage conversion unit inputs the converted positive voltage to the second voltage conversion unit, which adjusts the positive voltage and inputs it to the RF power amplifier circuit.

[0061] The radio frequency remote device provided in the embodiment of the present application has multiple output ends of the first voltage conversion unit corresponding to different power conversion circuits. Therefore, each output end can independently output current by controlling each power conversion circuit. Therefore, based on the power requirements of the radio frequency power amplifier circuit, the number of power conversion circuits that need to work can be flexibly configured, thereby improving the flexibility of energy distribution and reducing energy loss.

[0062] The specific structure of the radio remote device will be described below with reference to the accompanying drawings.

[0063] Structure 1:

[0064] In one embodiment, a portion of the multiple output ends of the first voltage conversion unit are used to connect to the radio frequency power amplifier circuit, and another portion of the multiple output ends of the first voltage conversion unit are connected to the radio frequency power amplifier circuit through the second voltage conversion unit.

[0065] FIG3 is a schematic diagram of a radio frequency remote device provided in an embodiment of the present application. The radio frequency remote device includes a voltage conversion module 300 and a radio frequency power amplifier circuit 400. The voltage conversion module 300 includes a first voltage conversion unit 310 and a second voltage conversion unit 320. The first voltage conversion unit 1 includes four output terminals and four power conversion circuits connected to the four output terminals, two of which are connected to the radio frequency power amplifier circuit 1a and the radio frequency power amplifier circuit 1b, respectively, and the other two output terminals are connected in parallel to the radio frequency power amplifier circuit 1c through the second voltage conversion unit A. The first voltage conversion unit 2 includes four output terminals and four power conversion circuits connected to the four output terminals, two of which are connected in parallel to the radio frequency power amplifier circuit 2a, and the other two output terminals are connected to the radio frequency power amplifier circuit 2b and the radio frequency power amplifier circuit 2c, respectively, through two second voltage conversion units. The first voltage conversion unit N includes two output terminals, which are connected in parallel to the radio frequency power amplifier circuit n.

[0066] Similarly, the RF power amplifier circuits connected to the output end of the first voltage conversion unit are different. When the power required by the RF power amplifier circuit decreases, the power conversion circuit in the first voltage conversion unit connected to the RF power amplifier circuit stops working, or the second voltage conversion unit connected to the RF power amplifier circuit and the power conversion circuit connected to the second voltage conversion unit stop working.

[0067] For example, assuming that the power required by the RF power amplifier circuit currently connected to the first voltage conversion unit is relatively large, each power conversion circuit in the first voltage conversion unit is in an operating state and directly or indirectly inputs a positive voltage to the RF power amplifier circuit to which it is connected. If the power required by the RF power amplifier circuit 2a decreases at a certain moment, some of the two power conversion circuits in the first voltage conversion unit 2 connected to the RF power amplifier circuit 2a can stop working. If the RF power amplifier circuit 2b does not need power at a certain moment, the second voltage conversion unit connected to the RF power amplifier circuit 2b and the power conversion circuit in the first voltage conversion unit 2 connected to the second voltage conversion unit 2b can stop working to reduce energy loss.

[0068] Furthermore, since some of the multiple output terminals corresponding to the power conversion circuit are directly connected to the RF power amplifier circuit, the power conversion circuits directly connected to the RF power amplifier circuit can convert negative voltages into positive voltages and input them into the RF power amplifier circuits to which they are connected. Each power conversion circuit only performs one voltage conversion, and each voltage conversion consumes only one power. The power supply architecture shown in FIG2 requires two voltage conversions, each of which consumes two power. Therefore, when converting the same negative voltage to the same positive voltage, the voltage conversion efficiency can be improved because the embodiment of the present application only performs one voltage conversion.

[0069] In the embodiment of the present application, since each power conversion circuit can be turned off independently, the number of power conversion circuits that need to work can be flexibly configured according to the change in the power demand of the radio frequency power amplifier circuit. In particular, when the power required by the radio frequency power amplifier circuit becomes less, part of the power conversion circuit or the second voltage conversion unit can be controlled to be turned off, thereby reducing energy loss. In addition, since part of the output terminals of the multiple output terminals corresponding to the power conversion circuit included in the first voltage conversion unit is directly connected to the radio frequency power amplifier circuit, it is only necessary to perform a voltage conversion on the electric energy input by the radio frequency remote device to supply power to the radio frequency power amplifier circuit. One voltage conversion only consumes one power, while the power supply architecture shown in FIG2 above requires two voltage conversions, and two voltage conversions have two power consumptions, which increases power consumption. Therefore, compared with the power supply architecture that requires two voltage conversions, the embodiment of the present application can improve the voltage conversion efficiency.

[0070] In the embodiment of the present application, the multiple output terminals corresponding to the multiple power conversion circuits and the radio frequency power amplification circuit can be connected in various ways.

[0071] In one embodiment, at least two output terminals of a portion of the plurality of output terminals of the first voltage conversion unit are connected in parallel to the RF power amplifier circuit. Alternatively, each output terminal of a portion of the plurality of output terminals of the first voltage conversion unit is connected to the RF power amplifier circuit in a one-to-one correspondence.

[0072] Referring to Figure 3 above, in one implementation, at least two output ends of a part of the multiple output ends are connected in parallel to the RF power amplifier circuit. The first voltage conversion unit 2 shown in the figure includes four power conversion circuits, of which the output ends corresponding to two power conversion circuits are connected in parallel to the RF power amplifier circuit 2a.

[0073] In another implementation, each output end of a portion of the multiple output ends is used to be connected one-to-one with a radio frequency power amplifier circuit. The first voltage conversion unit 1 shown in the figure includes four power conversion circuits, wherein the output ends of two power conversion circuits are respectively connected one-to-one with the radio frequency power amplifier circuit 1a and the radio frequency power amplifier circuit 1b.

[0074] In the embodiment of the present application, the multiple output terminals corresponding to the multiple power conversion circuits are connected to the radio frequency power amplification circuit through the second voltage conversion unit in various ways.

[0075] In one embodiment, each output end of another portion of the multiple output ends of the first voltage conversion unit is connected to a second voltage conversion unit in a one-to-one correspondence, and the output ends of the second voltage conversion unit are connected to a radio frequency power amplifier circuit in a one-to-one correspondence. Alternatively, at least two output ends of another portion of the multiple output ends are connected in parallel to the second voltage conversion unit, and the output ends of the second voltage conversion unit are connected to a radio frequency power amplifier circuit in a one-to-one correspondence.

[0076] Referring to Figure 3 above, in one implementation, each output end of another part of the multiple output ends is connected one-to-one with the second voltage conversion unit, and the output end of the second voltage conversion unit is used to be connected one-to-one with the RF power amplifier circuit. The first voltage conversion unit 2 shown in the figure includes four power conversion circuits, wherein the output ends of the two power conversion circuits are respectively connected one-to-one with the second voltage conversion unit B and the second voltage conversion unit C, and the output ends of the second voltage conversion unit B and the second voltage conversion unit C are respectively connected one-to-one with the RF power amplifier circuit 2b and the RF power amplifier circuit 2c.

[0077] In another implementation, at least two output ends of another part of the multiple output ends are connected in parallel to a second voltage conversion unit, and the output ends of the second voltage conversion unit are used to be connected one-to-one with the RF power amplifier circuit. The first voltage conversion unit 1 shown in the figure includes four power conversion circuits, of which the output ends of two power conversion circuits are connected in parallel to the RF power amplifier circuit 1c through the second voltage conversion unit A.

[0078] Structure 2:

[0079] In one embodiment, each of the multiple output terminals of the first voltage conversion unit is connected to the second voltage conversion unit in a one-to-one correspondence, and the output terminals of the second voltage conversion unit are connected to the radio frequency power amplification circuit in a one-to-one correspondence.

[0080] FIG4 is a schematic diagram of a radio frequency remote device provided by an embodiment of the present application. The two output terminals of the first voltage conversion unit 1 are connected to the radio frequency power amplifier circuit 1 through the second voltage conversion unit A. The first voltage conversion unit 2 includes three output terminals and three power conversion circuits connected to the three output terminals. Each output terminal is connected to a second voltage conversion unit, and each second voltage conversion unit is connected to a radio frequency power amplifier circuit. For example, the three output terminals of the first voltage conversion unit 2 are connected to the second voltage conversion unit B, the second voltage conversion unit C, and the second voltage conversion unit D, respectively. The three second voltage conversion units are connected to the radio frequency power amplifier circuit 2a, the radio frequency power amplifier circuit 2b, and the radio frequency power amplifier circuit 2c, respectively. The two output terminals of the first voltage conversion unit N are connected to the radio frequency power amplifier circuit n through the second voltage conversion unit E.

[0081] Similarly, the output end of the first voltage conversion unit is connected to a different RF power amplifier circuit through the second voltage conversion unit. When the power required by the RF power amplifier circuit decreases, the second voltage conversion unit connected to the RF power amplifier circuit and the power conversion circuit in the first voltage conversion unit connected to the second voltage conversion unit stop working.

[0082] For example, assuming that the RF power amplifier circuit currently connected to the first voltage conversion unit requires a large amount of power, each power conversion circuit in the first voltage conversion unit is in operation and inputs a positive voltage to the RF power amplifier circuit to which it is connected. If the power required by RF power amplifier circuit 2b decreases at a certain moment, the second voltage conversion unit 2b connected to RF power amplifier circuit 2b and the power conversion circuit in the first voltage conversion unit 2 connected to the second voltage conversion unit 2b can stop operating to reduce energy loss.

[0083] In the embodiments of the present application, the second voltage conversion unit can perform voltage conversion on the electrical energy output by the first conversion unit. This allows the output power of the second voltage conversion unit and the output power of the power conversion circuit connected to the second voltage conversion unit to be flexibly adjusted based on the power of the RF power amplifier circuit, thereby improving power distribution flexibility. In particular, when the power required by the RF power amplifier circuit decreases, part of the power conversion circuit or the second voltage conversion unit can be controlled to shut down, thereby reducing energy loss.

[0084] In addition, in some embodiments, some of the multiple output ends of the first voltage conversion unit may not be connected to the RF power amplifier circuit through the second voltage conversion unit, but may be directly connected to the RF power amplifier circuit, as shown in Structure 3 below.

[0085] Structure three:

[0086] In one embodiment, at least two output terminals of the first voltage conversion unit are connected in parallel to the radio frequency power amplification circuit.

[0087] FIG5 is a schematic diagram of a radio frequency remote device provided in an embodiment of the present application. The radio frequency remote device includes a voltage conversion module 300 and a radio frequency power amplifier circuit 400. The voltage conversion module 300 includes N first voltage conversion units 310. The first voltage conversion unit 1 includes two output terminals and power conversion circuits corresponding to the two output terminals, and the two output terminals are connected in parallel to the radio frequency power amplifier circuit 1; the first voltage conversion unit 2 includes four output terminals and four power conversion circuits corresponding to the four output terminals, two of which are connected in parallel to the radio frequency power amplifier circuit 2, and the other two output terminals are connected to the radio frequency power amplifier circuit 3 through the second voltage conversion unit; the first voltage conversion unit N includes two output terminals, and the two output terminals are connected to the radio frequency power amplifier circuit n.

[0088] In an embodiment of the present application, the output end of each first voltage conversion unit is respectively connected to a different RF power amplifier circuit. When the power required by a certain RF power amplifier circuit is small, some power conversion circuits in the first voltage conversion unit connected to the RF power amplifier circuit can stop working.

[0089] For example, assuming that the power required by the RF power amplifier circuit currently connected to each of the first voltage conversion units is relatively high, the power conversion circuit in each of the first voltage conversion units is in operation and inputs a positive voltage to the RF power amplifier circuit connected thereto. At a certain moment, if the power required by the RF power amplifier circuit 2 decreases, some of the power conversion circuits in the first voltage conversion unit 2 can stop operating to reduce energy loss.

[0090] In addition, there is voltage conversion efficiency when the voltage conversion unit converts the voltage. In the embodiment of the present application, at least two output terminals of the first voltage conversion unit are directly connected to the RF power amplifier circuit. Each first voltage conversion unit can convert a negative voltage into a positive voltage and input it into the RF power amplifier circuit to which it is connected. The first voltage conversion unit directly connected to the RF power amplifier circuit only converts the voltage once, and one voltage conversion consumes only one power. The power supply architecture shown in Figure 2 above requires two voltage conversions, and the two voltage conversions consume two power.

[0091] For example, with a -48V DC voltage as the input of the first voltage conversion unit, it is assumed that a certain radio frequency power amplifier circuit requires a +48V DC voltage. If the first voltage conversion unit is directly connected to the radio frequency power amplifier circuit, the first voltage conversion unit can convert the -48V voltage into a +48V DC voltage, and the conversion efficiency can reach 99%. If the first voltage conversion unit is connected to the radio frequency power amplifier circuit through the second voltage conversion unit, the first voltage conversion unit first converts the -48V voltage into a +20V DC voltage with a conversion efficiency of 98.5%. The second voltage conversion unit then adjusts the +20V DC voltage to +48V with a conversion efficiency of 98%. The final conversion efficiency is 98.5%*98%=96.5%. Since, in the embodiment of the present application, at least two output terminals of the first voltage conversion unit are connected to the radio frequency power amplifier circuit in parallel, the first voltage conversion unit directly connected to the radio frequency power amplifier circuit only performs one voltage conversion, thereby improving the voltage conversion efficiency.

[0092] In the embodiment of the present application, since at least two of the multiple output terminals corresponding to different power conversion circuits are connected in parallel and then directly connected to the radio frequency power amplifier circuit, and each power conversion circuit can be independently shut down, the number of power conversion circuits that need to work can be configured according to the power demand of the radio frequency power amplifier circuit. In particular, when the power required by the radio frequency power amplifier circuit decreases, some power conversion circuits can be controlled to be shut down, thereby reducing energy loss. In addition, since at least two output terminals corresponding to the power conversion circuit included in the first voltage conversion unit are directly connected to the radio frequency power amplifier circuit, it is only necessary to perform a voltage conversion on the electric energy input by the radio frequency remote device to supply power to the radio frequency power amplifier circuit. One voltage conversion only consumes one power, while the power supply architecture shown in FIG2 above requires two voltage conversions, and two voltage conversions have two power consumptions, which increases power consumption. Therefore, compared with the power supply architecture that requires two voltage conversions, the embodiment of the present application can improve the voltage conversion efficiency.

[0093] In the embodiment of the present application, the at least two output terminals of the first voltage conversion unit and the radio frequency power amplification circuit can be connected in various ways.

[0094] In one embodiment, a portion of the multiple output ends of the first voltage conversion unit are connected in parallel to the RF power amplifier circuit, and another portion of the multiple output ends of the first voltage conversion unit are connected in parallel to the RF power amplifier circuit through the second voltage conversion unit.

[0095] Exemplarily, some of the multiple output terminals of the first voltage conversion unit are connected in parallel to the RF power amplifier circuit. The first voltage conversion unit 2 shown in Figure 5 includes four output terminals and four power conversion circuits connected corresponding to the four output terminals, of which two output terminals are connected in parallel to the RF power amplifier circuit 2.

[0096] Another portion of the output terminals of the first voltage conversion unit are connected in parallel and then connected to the RF power amplifier circuit via the second voltage conversion unit. As shown in FIG5 , the other two output terminals of the first voltage conversion unit 2 are connected to the RF power amplifier circuit 3 via the second voltage conversion unit.

[0097] It is understood that at least two of the connection relationships between the first voltage conversion unit and the RF power amplifier circuit shown in the three aforementioned structures can occur in the same remote radio frequency device. For example, a portion of the multiple output terminals of one of the first voltage conversion units in the remote radio frequency device is connected to the RF power amplifier circuit, while another portion of the output terminals is connected to the RF power amplifier circuit via a second voltage conversion unit. Each of the multiple output terminals of another first voltage conversion unit is connected in a one-to-one correspondence to a second voltage conversion unit, and the output terminals of the second voltage conversion unit are connected in a one-to-one correspondence to the RF power amplifier circuit.

[0098] The above describes different structures of the radio remote device. The following further describes the control logic of the voltage conversion module 300 in the radio remote device.

[0099] In one embodiment, each first voltage conversion unit includes a first control unit, and the first control unit is used to disconnect or connect multiple power conversion circuits in the first voltage conversion unit according to the power required by the radio frequency power amplification circuit.

[0100] In an embodiment of the present application, each first voltage conversion unit includes a first control unit, which is applicable to any of the schematic diagrams in Figures 3 to 5 above. The following uses the architecture shown in Figure 3 as an example to introduce the control logic of the first control unit in an embodiment of the present application.

[0101] Each first voltage conversion unit includes a first control unit. In one implementation, each first voltage conversion unit includes one first control unit, which controls the on / off of multiple power conversion circuits in the first voltage conversion unit. In another implementation, each first voltage conversion unit includes multiple first control units, each of which controls the on / off of each power conversion circuit.

[0102] In the embodiment of the present application, each first voltage conversion unit includes a first control unit. FIG6 is a schematic diagram of a radio remote device corresponding to FIG3. Referring to FIG6, each first voltage conversion unit includes a first control unit, and each second voltage conversion unit includes a second control unit.

[0103] In an embodiment of the present application, the output ends of two power conversion circuits of the first voltage conversion unit 2 are connected in parallel to the RF power amplifier circuit 2a, and the first control unit included in the first voltage conversion unit 2 controls the conduction or disconnection of the two power conversion circuits connected to the RF power amplifier circuit 2a according to the power required by the RF power amplifier circuit 2a. Specifically, the power required by the RF power amplifier circuit 2a is relatively large, and the first control unit included in the first voltage conversion unit 2 controls the conduction of the two power conversion circuits. The power required by the RF power amplifier circuit 2a is relatively small, and the first control unit included in the first voltage conversion unit 2 controls the conduction of one power conversion circuit.

[0104] Referring to FIG6 , assuming that the first voltage conversion unit 2 converts a negative DC voltage of -48V into a positive DC voltage of 50V with an output current of 8A, if the RF power amplifier circuit 2a requires a voltage of 50V and a power of 800W, the first control unit included in the first voltage conversion unit 2 controls both power conversion circuits connected to the RF power amplifier circuit 2a to be turned on, and the first voltage conversion unit 2 outputs a voltage of 50V and a power of 800W to the RF power amplifier circuit 2a. If the RF power amplifier circuit 2a requires a voltage of 50V and a power of 400W, the first control unit included in the first voltage conversion unit 2 controls one of the power conversion circuits connected to the RF power amplifier circuit 2a to be turned on, and the first voltage conversion unit 2 outputs a voltage of 50V and a power of 400W to the RF power amplifier circuit 2a, thereby reducing energy loss.

[0105] In the embodiment of the present application, the first control unit can flexibly control the number of power conversion circuits required to operate in the power conversion circuit connected to the RF power amplifier circuit based on changes in the power demand of the RF power amplifier circuit, thereby reducing energy loss. In addition, each first voltage conversion unit includes a first control unit, and each first control unit operates independently. Even if a first control unit fails, it will not affect the operation of other first control units, thereby reducing the coupling of the system.

[0106] In one embodiment, the radio remote device further includes a centralized control unit, configured to disconnect or connect the multiple power conversion circuits of each first voltage conversion unit according to the power required by the radio frequency power amplification circuit.

[0107] FIG7 is a schematic diagram of another remote radio frequency device corresponding to that shown in FIG3 . The remote radio frequency device shown in FIG7 is substantially similar to the remote radio frequency device shown in FIG6 . The difference is that each first voltage conversion unit shown in FIG6 includes a first control unit, which controls the conduction or disconnection of the power conversion circuit within each first voltage conversion unit. The remote radio frequency device shown in FIG7 , on the other hand, includes a centralized control unit, which controls the conduction or disconnection of the power conversion circuit connected to the RF power amplifier circuit in the first voltage conversion unit based on the power required by the RF power amplifier circuit.

[0108] The radio remote device provided in the embodiment of the present application includes a centralized control unit, which has high integration and low cost.

[0109] When describing the architecture shown in FIG2 , it was noted that the output voltage of an isolated inverting open-loop DC-DC converter or a non-isolated inverting open-loop DC-DC converter cannot be adjusted accordingly with the voltage changes required by the RF power amplifier circuit, resulting in high voltage conversion efficiency. To improve the voltage conversion efficiency of the voltage conversion unit, the following further describes the control of the output voltages of the first and second voltage conversion units in embodiments of the present application, in conjunction with FIG8 and FIG9 .

[0110] In one embodiment, each first voltage conversion unit includes a first control unit, and each second voltage conversion unit includes a second control unit.

[0111] The first control unit is used to obtain the voltage required by the radio frequency power amplifier circuit connected to the first voltage conversion unit, and the second control unit is used to obtain the voltage required by the radio frequency power amplifier circuit connected to the second voltage conversion unit.

[0112] The first control unit is used to control the output voltage of the power conversion circuit connected to the second voltage conversion unit according to the voltage, and the second control unit is used to control the output voltage of the second voltage conversion unit according to the voltage.

[0113] In the embodiment of the present application, each first voltage conversion unit and each second voltage conversion unit includes a power switch. Each power switch can be a MOSFET, an IGBT, a switch circuit composed of multiple MOSFETs connected in parallel or in series, a switch circuit composed of multiple IGBTs connected in parallel or in series, a switch circuit composed of a MOSFET and a reverse-connected diode in parallel, or a switch circuit composed of an IGBT and a reverse-connected diode in parallel, without specific limitation herein.

[0114] In the embodiment of the present application, the output voltages of the first and second voltage conversion units are controlled by adjusting the duty cycle of the power switch. For details, please refer to the relevant content of Figures 10A-10D and Figures 12A-12C below.

[0115] In an embodiment of the present application, the first control unit is used to obtain the voltage required by the radio frequency power amplifier circuit connected to the first voltage conversion unit, and the second control unit is used to obtain the voltage required by the radio frequency power amplifier circuit connected to the second voltage conversion unit. In one possible implementation, the first control unit and the second control unit communicate with a radio frequency integrated circuit (RF / IC). Among them, RF / IC has the ability to obtain the voltage required by each radio frequency power amplifier circuit. That is, for any radio frequency power amplifier circuit connected to the voltage conversion module 300, RF / IC can obtain the voltage required by the radio frequency power amplifier circuit. In an embodiment of the present application, the voltage conversion module 300 can power the RF / IC.

[0116] As shown in Figure 8, it is a schematic diagram of another telescopic device provided in an embodiment of the present application. The figure shows that two inverting DC-DC converters are respectively connected to the RF power amplifier circuit 1 and the RF power amplifier circuit 2, and one inverting DC-DC converter is connected to the three RF power amplifier circuits through three non-inverting DC-DC converters. Among them, the inverting DC-DC converter is equivalent to the first voltage conversion unit in the embodiment of the present application, and each inverting DC-DC converter includes a first control unit. The non-inverting DC-DC converter is equivalent to the second voltage conversion unit in the embodiment of the present application, and each non-inverting DC-DC converter includes a second control unit. The first control unit and the second control unit can both communicate with the RF / IC. The figure only shows part of the first control unit and the second control unit communicating with the RF / IC.

[0117] With a -48V DC voltage as the input of the inverting DC-DC converter, and assuming that the DC positive voltages required by RF power amplifier circuit 1 and RF power amplifier circuit 2 are +34V and +48V, respectively, inverting DC-DC converter 1 converts the -48V DC negative voltage into a +34V DC positive voltage while simultaneously performing voltage polarity conversion, and outputs the +34V DC positive voltage to RF power amplifier circuit 1. Inverting DC-DC converter 2 converts the -48V DC negative voltage into a +48V DC positive voltage while simultaneously performing voltage polarity conversion, and outputs the +48V DC positive voltage to RF power amplifier circuit 2.

[0118] In an embodiment of the present application, if the first control unit included in the inverting DC-DC converter 1 receives feedback from the RF / IC that the voltage required by the RF power amplifier circuit 1 is +40V, the first control unit controls the switching duty cycle of the power switch of the switching tube of the inverting DC-DC converter 1 to output a +40V DC positive voltage to the RF power amplifier circuit 1.

[0119] In the embodiment of the present application, the first voltage conversion unit is capable of converting voltage polarity and controlling voltage magnitude, and the second voltage conversion unit is capable of controlling and adjusting the magnitude of the voltage output by the first conversion unit. The first voltage conversion unit and the second voltage conversion unit include different topology circuits, and the different topology circuits correspond to different optimal voltage conversion intervals. The optimal voltage conversion interval in the embodiment of the present application indicates that the conversion efficiency of converting a certain voltage to a voltage within the optimal voltage conversion interval is higher.

[0120] For example, assuming that the first voltage conversion unit includes a Buck-Boost circuit with an inversion function, the Buck-Boost circuit converts -48 V to +48 V. assuming that the second voltage conversion unit includes a Buck circuit or a Boost circuit, the Buck circuit converts +48 V to +28 V, and the Boost circuit converts +48 V to +50 V.

[0121] As shown in FIG8 , with a -48V DC voltage as the input of the inverter DC-DC converter, and assuming that the DC positive voltages required by RF power amplifier circuit 1 and RF power amplifier circuit 2 are +34V and +48V, respectively, inverter DC-DC converter 1 converts the -48V DC negative voltage into a 34V DC positive voltage while simultaneously performing voltage polarity conversion, and outputs a +34V DC positive voltage to RF power amplifier circuit 1. Inverting DC-DC converter 2 converts the -48V DC negative voltage into a 48V DC positive voltage while simultaneously performing voltage polarity conversion, and outputs a +48V DC positive voltage to RF power amplifier circuit 2.

[0122] For inverting DC-DC converter 3, during a first time period, the three circuits connected to the three non-inverting DC-DC converters (including RF power amplifier circuit 3, RF power amplifier circuit 4, and RF / IC) require positive DC voltages of +60V, +80V, and +10V, respectively. Inverting DC-DC converter 3 converts the negative DC voltage of -48V into positive DC voltages of +34V, +48V, and +20V, assuming conversion efficiencies of 97%, 98%, and 98.5%, respectively. The three non-inverting DC-DC converters regulate the input positive voltages according to the voltages required by their respective connected RF power amplifier circuits. That is, non-inverting DC-DC converter 1, non-inverting DC-DC converter 2, and non-inverting DC-DC converter 3 convert +34V, +48V, and +20V into +60V, +80V, and +10V, respectively. Assuming conversion efficiencies of 97.5%, 96%, and 98.5%, respectively, the three non-inverting DC-DC converters regulate the input positive voltages.

[0123] During the second time period, the voltages required by the three RF power amplifier circuits are converted to +80V, +100V, and +10V, respectively. At this point, the RF / IC feeds back the voltages required by RF power amplifier circuits 3 and 4 to the first control unit of inverter DC-DC converter 3. The first control unit then controls inverter DC-DC converter 3 based on the fed-back voltages to adjust the output voltages of each power conversion circuit. For example, when the voltages required by the three RF power amplifier circuits are converted to +80V, +100V, and +10V, inverter DC-DC converter 3 does not adjust the voltages and still outputs +34V, +48V, and +20V, with conversion efficiencies of 97%, 98%, and 98.5%, respectively. Each of the three non-inverting DC-DC converters includes a second control unit that regulates the positive voltage output by inverting DC-DC converter 3 according to the voltage required by the RF power amplifier circuit connected to each of the three non-inverting DC-DC converters. That is, non-inverting DC-DC converter 1, non-inverting DC-DC converter 2, and non-inverting DC-DC converter 3 convert +34V, +48V, and +20V to +80V, +100V, and +10V, respectively, assuming conversion efficiencies of 98%, 97%, and 98.5%, respectively. Therefore, the conversion efficiency of voltage conversion module 300 in converting -48V to +80V, +100V, and +10V is ultimately 95%, 95%, and 97%, respectively. Thus, the voltage conversion efficiency of voltage conversion module 300 is as high as 97%.

[0124] To improve the overall voltage conversion efficiency of the voltage conversion module, the inverting DC-DC converter 3 and the non-inverting DC-DC converter jointly adjust the voltage and output it to the RF power amplifier circuits connected to them. For example, if the three RF power amplifier circuits require voltage conversions of +80V, +100V, and +10V, the inverting DC-DC converter 3 converts the -48V negative DC voltage to +40V, +65V, and +20V, assuming conversion efficiencies of 98.5%, 99%, and 98.5%, respectively. Each of the three non-inverting DC-DC converters includes a second control unit that regulates the positive voltage output by the inverting DC-DC converter 3 according to the voltage required by the radio frequency power amplifier circuit connected to each of the three non-inverting DC-DC converters. That is, the non-inverting DC-DC converter 1, the non-inverting DC-DC converter 2, and the non-inverting DC-DC converter 3 convert +40V, +65V, and +20V to +80V, +100V, and +10V, respectively. Assuming that the conversion efficiency can reach 99%, 99.5%, and 98.5%, respectively. Therefore, the conversion efficiency of the voltage conversion module 300 for converting -48V to +80V, +100V, and +10V is ultimately 97.5%, 98.5%, and 97%, respectively. This shows that the voltage conversion efficiency of the voltage conversion module 300 is not less than 97%. Compared to the inverting DC-DC converter 3 in the above example, which converts -48V to +34V, +48V, and +20V, and the three non-inverting converters, which adjust +34V, +48V, and +20V to +80V, +100V, and +10V, the voltage conversion efficiency of the voltage conversion module 300 can be increased by approximately 2%. Therefore, the combined voltage regulation in the embodiment of the present application can achieve higher efficiency.

[0125] It should be noted that the first control unit and the second control unit can also obtain the power required by the RF power amplifier circuit. In the process of the first control unit and the second control unit adjusting the output voltage of the first voltage conversion unit and the second voltage conversion unit according to the voltage required by the RF power amplifier circuit, the output current of the first voltage conversion unit and the second voltage conversion unit is controlled according to the constant power criterion.

[0126] For example, assuming that the RF power amplifier circuit 3 requires a voltage of 80V and a power of 400W, the power conversion circuit in the inverting DC-DC converter 3, connected to the non-inverting DC / DC converter 1, converts the negative DC voltage of -48V to +40V and outputs a positive DC voltage of +40V and a current of 10A. The non-inverting DC / DC converter 1 adjusts the +40V voltage to +80V and outputs a positive DC voltage of +80V and a current of 5A. Throughout this process, the power is maintained at 400W.

[0127] In an embodiment of the present application, the first control unit and the second control unit can jointly regulate the voltage according to the voltage required by the RF power amplifier circuit. Specifically, they can respectively control the output voltage of the power conversion circuit connected to the second voltage conversion unit and the output voltage of the second voltage conversion unit according to the voltage required by the RF power amplifier circuit. This can improve the voltage conversion efficiency of the first voltage conversion unit and the voltage conversion efficiency of the second voltage conversion unit, thereby reducing losses. In addition, any first control unit independently controls a first voltage conversion unit, and any second control unit independently controls a second voltage conversion unit. Each control unit operates independently, and even if a control unit fails, it will not affect the operation of the other control units, thereby reducing the coupling of the system.

[0128] In one embodiment, the radio remote device further includes a centralized control unit. The centralized control unit is configured to obtain a voltage required by the radio frequency power amplifier circuit and, based on the voltage required by the radio frequency power amplifier circuit, control the output voltage of a second voltage conversion unit connected to the radio frequency power amplifier circuit and the output voltage of a power conversion circuit connected to the second voltage conversion unit.

[0129] In an embodiment of the present application, the centralized control unit can communicate with the RF / IC, wherein the RF / IC is capable of obtaining the voltage required by the RF power amplifier circuit. That is, for any RF power amplifier circuit connected to the voltage conversion module 300, the RF / IC can obtain the voltage required by the RF power amplifier circuit. The centralized control unit controls the output voltage of the second voltage conversion unit connected to the RF power amplifier circuit and the output voltage of the power conversion circuit connected to the second voltage conversion unit based on the voltage required by the RF power amplifier circuit.

[0130] As shown in Figure 9, a schematic diagram of another radio frequency remote device provided in an embodiment of the present application is shown. The figure shows that two inverting DC-DC modules are connected to the radio frequency power amplifier circuit 1 and the radio frequency power amplifier circuit 2 respectively, and one inverting DC-DC module is connected to the three radio frequency power amplifier circuits through three non-inverting closed-loop DC-DC modules. The centralized control unit is connected to the RF / IC and the three inverting DC-DC modules and the three non-inverting closed-loop DC-DC modules. Among them, the inverting DC-DC module is equivalent to the first voltage conversion unit in the embodiment of the present application, and the non-inverting closed-loop DC-DC module is equivalent to the second voltage conversion unit in the embodiment of the present application.

[0131] In the embodiment of the present application, the specific adjustment process is similar to that of FIG8 , except that in the voltage adjustment process shown in FIG8 , both the first control unit and the second control unit communicate with the RF / IC, and the first control unit and the second control unit adjust the output voltages of the first voltage conversion unit and the second voltage conversion unit, respectively, based on the feedback from the RF / IC. The voltage adjustment process shown in FIG9 is that the centralized control unit communicates with the first voltage conversion unit and the RF / IC, and the centralized control unit obtains the voltage required by each RF power amplifier circuit fed back by the RF / IC, and controls the output voltages of the first voltage conversion unit and the second voltage conversion unit, respectively, based on the voltage required by each RF power amplifier circuit fed back, to improve voltage conversion efficiency.

[0132] In this embodiment of the present application, the centralized control unit can control the output voltage of a second voltage conversion unit connected to the RF power amplifier circuit, as well as the output voltage of a power conversion circuit connected to the second voltage conversion unit, based on the voltage required by the RF power amplifier circuit. This can improve the voltage conversion efficiency of the first voltage conversion unit and the voltage conversion efficiency of the second voltage conversion unit, thereby reducing losses. Furthermore, the inclusion of a centralized control unit in the remote radio frequency device provides a high level of integration and low cost.

[0133] As described above, the power conversion circuit in the first voltage conversion unit can be a Buck-Boost circuit. The present application does not limit the specific circuit form of the first voltage conversion unit in the embodiments of the present application. As long as the power conversion circuit in the first voltage conversion unit can achieve voltage polarity conversion, the present application can be applied. The following describes the operating principle of the first voltage conversion unit with reference to Figures 10A to 10D.

[0134] Figure 10A is a schematic diagram of a circuit topology of a first voltage conversion unit provided in an embodiment of the present application. In one embodiment, the power conversion circuit in each first voltage conversion unit includes two power switches K1 and K2 connected in series, an inductor Lr, and two capacitors C1 and C2.

[0135] One end of the two power switches K1 and K2 connected in series is connected to one end of a capacitor C1, and the other end of the two power switches K1 and K2 connected to one end of another capacitor C2. The series connection point of the two power switches K1 and K2 is connected to one end of an inductor Lr. The other ends of the two capacitors C1 and C2 are connected to the other end of the inductor Lr.

[0136] The other ends of the two power switches connected in series and the other end of the capacitor are output ends of the power conversion circuit.

[0137] The power conversion circuit in the embodiment of the present application is a non-isolated circuit. The power switches K1 and K2 are each composed of a MOSFET connected in parallel with a reverse-connected diode. Of course, the present application does not limit the specific form of the power switch; the power switch may also be a MOSFET or an IGBT, or may be composed of multiple MOSFETs connected in parallel or in series, or may be composed of multiple IGBTs connected in parallel or in series. These are not specifically limited here.

[0138] In specific operation, for example, during the first time period, K1 is on and K2 is off. At this point, K1, inductor Lr, and the negative DC power supply form a loop. Inductor Lr can receive the negative voltage -Vin and charge. During the second time period, K1 is off and K2 is on. At this point, K2, inductor Lr, and the output terminal form a branch circuit. Inductor Lr discharges to the output terminal, outputting a positive voltage +VO1.

[0139] FIG10B is a schematic diagram of a circuit topology of another first voltage conversion unit provided in an embodiment of the present application. As shown in FIG10B , the power conversion circuit includes a switch unit 10 , a voltage conversion unit 20 , and a capacitor unit 30 .

[0140] The switch unit includes four power switches, for example, a first power switch K1, a second power switch K2, a third power switch K3, and a fourth power switch K4. The first power switch K1, the second power switch K2, the third power switch K3, and the fourth power switch K4 are connected in series. The voltage conversion unit 20 includes a capacitor Cr and an inductor Lr. The specific connections are shown in the figure and are not further described.

[0141] Capacitor unit 30 may include at least one capacitor, or may include at least one capacitor and at least one resistor connected together. For example, in FIG10B , capacitor unit 30 includes resistor R1 and capacitor C2 connected in series. Capacitor unit 30 has a filtering function for filtering the positive voltage +VO1.

[0142] Specifically, when the power conversion circuit is operating, K1 and K3 form one group of power switches, and K2 and K4 form another group of power switches. The power switches in the same group have the same on-off state, while the power switches in different groups have opposite on-off states.

[0143] For example, during the first time period, K1 and K3 are off, while K2 and K4 are on. At this point, K2, the voltage conversion unit 20, and K4 form a loop with the negative DC power supply. The voltage conversion unit 20 can receive the negative voltage -Vin and charge. During the second time period, K1 and K3 are on, while K2 and K4 are off. At this point, K1, the voltage conversion unit 20, and K3 form a branch circuit with the output terminal. The voltage conversion unit 20 discharges to the output terminal, outputting a positive voltage +VO1.

[0144] FIG10C is a topological diagram of another first voltage conversion unit circuit provided in an embodiment of the present application. As shown in FIG10C , the first voltage conversion unit includes an inverter circuit 40 , a transformer 50 , and a power conversion circuit 60 .

[0145] In FIG10C , the inverter circuit 40 includes two sets of power switches. The transformer 50 includes a resonant capacitor Cr, a resonant inductor Lr, an excitation inductor Lm, and a transformer T. The resonant capacitor Cr, the resonant inductor Lr, and the excitation inductor Lm form an energy transmission network. The power conversion circuit 60 includes two switching transistors V1 and V2, a filter inductor L1, and a filter capacitor C2.

[0146] The inverter circuit 40 includes two groups of parallel power switches, each group of power switches includes two series power switches, the transformer 50 includes a resonant capacitor Cr, a resonant inductor Lr, an excitation inductor Lm and a transformer T, and each power conversion circuit includes two switching tubes V1 and V2, a filter capacitor C2 and a filter inductor L1.

[0147] One end of the resonant capacitor Cr is connected to the series connection point of the two power switches of one group of power switches, the other end of the resonant capacitor Cr is connected to one end of the resonant inductor Lr, the other end of the resonant inductor Lr is connected to one end of the primary winding of the transformer T and one end of the excitation inductor Lm, and the other end of the excitation inductor Lm is connected to the other end of the primary winding of the transformer T and the series connection point of the two power switches of the other group of power switches.

[0148] One end of a switch tube V1 in the power conversion circuit 60 is connected to one end of the secondary winding, one end of another switch tube V2 is connected to the other end of the secondary winding, the other ends of the two switch tubes are connected to one end of the filter inductor L1, the other end of the filter inductor L1 is connected to one end of the filter capacitor C2, and the other end of the filter capacitor C2 is connected to the center tap of the secondary winding.

[0149] In the embodiment of the present application, when the first voltage conversion unit is working, the on-off states of K1 and K4 are the same, the on-off states of K2 and K3 are the same, and the on-off states of K1 and K4 are opposite to the on-off states of K2 and K3.

[0150] For example, during the first time period, K2 and K3 are off, while K1 and K4 are on. At this point, K1, the energy transmission network, the transformer's primary winding, K4, and the negative DC power supply form a loop. The energy transmission network can obtain the negative voltage -Vin and transmit electrical energy to the transformer. The transformer then transmits the electrical energy to the power conversion circuit 60, which then outputs the voltage +VO1.

[0151] During the second time period, K2 and K3 are on, while K1 and K4 are off. At this point, K2, the energy transmission network, the transformer's primary winding, K3, and the negative DC power supply form a loop. The energy transmission network can obtain the negative voltage -Vin and transmit electrical energy to the transformer. The transformer then transmits the electrical energy to the power conversion circuit 60, which then outputs the voltage +VO1.

[0152] Fig. 10D is a topological diagram of another first voltage conversion unit circuit provided by an embodiment of the present application. The first conversion unit shown in Fig. 10D includes multiple output terminals.

[0153] The first conversion unit includes an inverter circuit 40 , a transformer 50 , and a plurality of power conversion circuits. The transformer 50 includes a plurality of secondary windings.

[0154] The output end of the inverter circuit 40 is connected to the primary winding of the transformer 50 , and the multiple secondary windings are connected to the multiple power conversion circuits in a one-to-one correspondence.

[0155] In one embodiment, one end of a switch tube V1 in any power conversion circuit is connected to one end of the secondary winding, one end of another switch tube V2 is connected to the other end of the secondary winding, the other ends of the two switch tubes are connected to one end of the filter inductor L1, the other end of the filter inductor L1 is connected to one end of the filter capacitor C2, and the other end of the filter capacitor C2 is connected to the center tap of the secondary winding.

[0156] The other end of the filter inductor L1 and one end of the filter capacitor C2 are output ends of the power conversion circuit.

[0157] As shown in FIG10D , the emitters of V1 and V2 are connected to two ends of the transformer T, and the collectors of V1 and V2 are connected to one end of the filter inductor L1. In some implementations, the collectors of V1 and V2 are connected to two ends of the transformer T, and the emitters of V1 and V2 are connected to one end of the filter inductor L1.

[0158] The working process of FIG10D is similar to that of FIG10C , except that the first voltage conversion unit shown in FIG10C outputs one positive voltage +VO1 , while the first voltage conversion unit shown in FIG10D outputs multiple positive voltages +VO1 .

[0159] It is understood that in the embodiment of the present application, when the first voltage conversion unit adopts a non-isolated circuit, the voltage conversion module 300 can implement a direct current-return common (DC-C) power supply mode. When the first voltage conversion unit adopts an isolated circuit, the voltage conversion module 300 can implement a direct current-return isolate (DC-I) or DC-DC power supply mode.

[0160] Figure 11A shows the DC-I distributed power supply architecture. DC-I uses a three-wire power supply. The RTN line and ground line are independent of each other. The ground line serves only as a protective ground (discharging current only in scenarios like lightning strikes). The ground network does not participate in the power supply return current. This architecture converts negative voltage to positive voltage through isolated phase inversion.

[0161] Figure 11B shows a DC-C distributed power supply architecture. DC-C is a two-wire power supply. The RTN line and ground line are not independent of each other and both contribute to the power supply return. This architecture converts negative voltage to positive voltage through isolated or non-isolated phase inversion.

[0162] The specific circuit of each second voltage conversion unit is not limited in the embodiment of the present application, as long as each second voltage conversion unit can achieve voltage boost or voltage reduction.

[0163] In one embodiment, the second voltage conversion unit includes: a Buck circuit, or a Boost circuit, or a Buck-Boost circuit.

[0164] In the embodiment of the present application, the Buck-Boost circuit included in the second voltage conversion unit does not have voltage polarity conversion. Of course, each second voltage conversion unit can also be a combination of various circuits. For example, each second voltage conversion unit can be a combination of a Buck circuit and a Boost circuit, a combination of a Buck circuit and a Buck-Boost circuit, or a combination of a Buck circuit, a Boost circuit, and a Buck-Boost circuit, etc., without specific limitation.

[0165] For example, referring to FIG. 12A , in one embodiment, the second voltage conversion unit includes a power switch K5 , a diode VD3 , a capacitor C3 , and an inductor L2 .

[0166] In Figure 12A , for any second voltage conversion unit, the drain of power switch K5 is connected to the output of the first voltage conversion unit to receive the positive voltage +VO1 output by the first conversion unit. The source of power switch K5 is connected to the cathode of diode VD3 and one end of inductor L2. The anode of diode VD3 is connected to the output of the first voltage conversion unit and one end of capacitor C3. The other end of capacitor C3 is connected to the other end of inductor L2 and serves as the output of the second voltage conversion unit to output the adjusted DC positive voltage +VO2. It will be understood that the gate of power switch K5 is used to receive a control signal to switch it on or off under the control of the control signal.

[0167] In the case of the second voltage conversion unit shown in Figure 12A, when the power switch K5 is turned on, both capacitor C3 and inductor L2 are powered. Inductor L2 receives the positive DC voltage output by the first voltage conversion unit through the power switch K5 and stores energy. When the power switch K5 is turned off, inductor L2 releases the previously stored energy to capacitor C3, providing power to capacitor C3. As the power supply to inductor L2 gradually decreases, the second voltage conversion unit can achieve a voltage reduction function. Here, +VO2 = +VO1 * D. D is the switching duty cycle of power switch K5.

[0168] For another example, referring to FIG12B , in another case, the second voltage conversion unit includes a power switch K6 , a diode VD4 , a capacitor C4 , and an inductor L3 . Specific connection relationships are shown in FIG12B and will not be further described.

[0169] In the operating state of the second voltage conversion unit shown in Figure 12B , when the power switch K6 is on, inductor L3 receives the positive DC voltage output by the first voltage conversion unit and stores energy. When the power switch K6 is off, this positive DC voltage supplies power to capacitor C4 via diode VD4. Simultaneously, inductor L3 releases its previously stored energy to capacitor C4 via diode VD4. Therefore, the second voltage conversion unit can achieve a voltage boost function. Here, +VO2 = +VO1 * D. D is the switching duty cycle of power switch K6.

[0170] For another example, referring to FIG12C , in yet another case, the second voltage conversion unit includes power switches K7 to K10 , capacitors C5 and C6 , and inductor L3 . Specific connection relationships are shown in FIG12C and will not be further described.

[0171] When the second voltage conversion unit shown in Figure 12C is operating, when power switches K7 and K10 are on and power switches K9 and K8 are off, inductor L4 receives the positive DC voltage output by the first voltage conversion unit and stores energy. When power switches K7 and K10 are off and power switches K9 and K8 are on, inductor L4 releases the previously stored energy to capacitor C6. Therefore, the second voltage conversion unit can achieve a boost function. Here, +VO2 = +VO1*D / (1-D). D is the switching duty cycle of the simultaneously on power switches K7 and K10. Voltage boost / buck can be achieved by adjusting the value of D.

[0172] In addition, the first conversion unit in the embodiment of the present application can flexibly select any one of the circuits in Figures 10A to 10D according to actual conditions. The second voltage conversion unit can also flexibly select any one of the circuits or a combination of circuits in Figures 12A to 12C according to actual conditions.

[0173] The remote radio device in the embodiment of the present application may be a remote radio unit (RRU) or a multi-antenna array (massive MIMO) that integrates an antenna and an RRU.

[0174] If the remote radio unit is an RRU, as shown in Figure 1 , the RRU is connected to the antenna 5 via a feeder 6. If the remote radio unit is a massive MIMO, a schematic diagram of the base station is shown in Figure 13 .

[0175] With reference to Figure 1 , assume that the remote radio frequency device 3 contains four RF power amplifier circuits operating in different frequency bands. Therefore, it requires four different supply voltages, for example, 12V, 28V, 50V, and 65V. The remote radio frequency device 3 can convert the negative voltage -Vin provided by the negative DC power supply into voltages of 12V, 28V, 50V, and 65V; alternatively, it can convert the negative voltage -Vin into a positive voltage and then convert the positive voltage back into 12V, 28V, 50V, and 65V. The converted voltages are then passed through the corresponding RF power amplifier circuits in the remote radio frequency device 3. Once the RF power amplifier circuits in the remote radio frequency device 3 receive the supply voltages, they can be powered on and operate normally.

[0176] In the embodiment of the present application, the installation locations of the remote radio unit 3, antenna 5, and feeder 6 are not specifically limited. In Figure 1 , the remote radio unit 3, antenna 5, and feeder 6 are installed on the top of a tower 8. Of course, the remote radio unit 3, antenna 5, and feeder 6 can also be installed on a mountain, a rooftop, or the like.

[0177] The specific working process shown in FIG13 is similar to that in FIG1 and will not be described in detail.

[0178] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A radio frequency remote device, characterized in that: The radio remote device includes at least one first voltage conversion unit, at least one second voltage conversion unit and a radio frequency power amplification circuit, each of the first voltage conversion units is used to convert an input negative voltage into a positive voltage, and each of the second voltage conversion units is used to convert a voltage output by the first voltage conversion unit, wherein: Each of the first voltage conversion units includes multiple output ends, each of the output ends is connected to a different power conversion circuit in the first voltage conversion unit, and at least one output end of the first voltage conversion unit is connected to the RF power amplifier circuit through the second voltage conversion unit.

2. The radio remote device according to claim 1, characterized in that: A portion of the multiple output ends of the first voltage conversion unit is connected to a radio frequency power amplifier circuit, and another portion of the multiple output ends of the first voltage conversion unit is connected to a radio frequency power amplifier circuit through the second voltage conversion unit.

3. The radio remote device according to claim 2, characterized in that: Part of the output ends of the plurality of output ends of the first voltage conversion unit are connected to the radio frequency power amplification circuit, including: At least two output ends of a part of the plurality of output ends are connected in parallel to a radio frequency power amplifier circuit; or, Each output end of a part of the multiple output ends is connected to the radio frequency power amplifier circuit in a one-to-one correspondence.

4. The radio remote device according to claim 2 or 3, characterized in that: Another part of the output ends of the plurality of output ends of the first voltage conversion unit is connected to the radio frequency power amplification circuit through the second voltage conversion unit, including: Each output end of another part of the output ends of the plurality of output ends is connected to the second voltage conversion unit in a one-to-one correspondence, and the output ends of the second voltage conversion unit are connected to the radio frequency power amplifier circuit in a one-to-one correspondence; or, At least two output ends of another part of the multiple output ends are connected in parallel to the second voltage conversion unit, and the output ends of the second voltage conversion unit are connected to the radio frequency power amplifier circuit in a one-to-one correspondence.

5. The radio remote device according to any one of claims 1 to 4, characterized in that: Each of the multiple output ends of the first voltage conversion unit is connected to the second voltage conversion unit in a one-to-one correspondence, and the output end of the second voltage conversion unit is connected to the radio frequency power amplification circuit in a one-to-one correspondence.

6. The radio remote device according to any one of claims 1 to 5, characterized in that: Each of the first voltage conversion units comprises a first control unit; The first control unit is used to disconnect or connect multiple power conversion circuits in the first voltage conversion unit according to the power required by the radio frequency power amplification circuit.

7. The radio remote device according to any one of claims 1 to 5, characterized in that: The radio remote device also includes a centralized control unit; The centralized control unit is used to disconnect or connect the multiple power conversion circuits of each first voltage conversion unit according to the power required by the radio frequency power amplification circuit.

8. The radio remote device according to any one of claims 1 to 5, characterized in that: Each of the first voltage conversion units includes a first control unit, and each of the second voltage conversion units includes a second control unit; The first control unit is used to obtain the voltage required by the radio frequency power amplifier circuit connected to the first voltage conversion unit, and the second control unit is used to obtain the voltage required by the radio frequency power amplifier circuit connected to the second voltage conversion unit; The first control unit is used to control the output voltage of the power conversion circuit connected to the second voltage conversion unit according to the voltage, and the second control unit is used to control the output voltage of the second voltage conversion unit according to the voltage.

9. The radio remote device according to any one of claims 1 to 5, characterized in that: The radio remote device comprises a centralized control unit; The centralized control unit is used for: Obtain the voltage required by the RF power amplifier circuit; The output voltage of the second voltage conversion unit connected to the radio frequency power amplification circuit and the output voltage of the power conversion circuit connected to the second voltage conversion unit are controlled according to the voltage.

10. The radio remote device according to any one of claims 1 to 9, characterized in that: Each of the power conversion circuits includes two power switches connected in series, an inductor and two capacitors; One end of the two power switches connected in series is connected to one end of the capacitor, the other end of the two power switches connected in series is connected to one end of the other capacitor, and the series connection point of the two power switches connected in series is connected to one end of the inductor; The other ends of the two capacitors and the other end of the inductor are connected to each other; The other ends of the two power switches connected in series and the other end of the capacitor are output ends of the power conversion circuit.

11. The radio remote device according to any one of claims 1 to 9, characterized in that: The first voltage conversion unit further includes an inverter circuit and a transformer, wherein the transformer includes a plurality of secondary windings; The output end of the inverter circuit is connected to the primary winding of the transformer, and the plurality of secondary windings are connected to the plurality of power conversion circuits in a one-to-one correspondence.

12. The radio remote device according to claim 11, characterized in that: One end of one of the switch tubes in any of the power conversion circuits is connected to one end of the secondary winding, one end of the other switch tube is connected to the other end of the secondary winding, the other ends of the two switch tubes are connected to one end of the filter inductor, the other end of the filter inductor is connected to one end of the filter capacitor, and the other end of the filter capacitor is connected to the center tap of the secondary winding; The other end of the filter inductor and one end of the filter capacitor are output ends of the power conversion circuit.

13. A voltage conversion device, characterized in that: The voltage conversion device includes at least one first voltage conversion unit and at least one second voltage conversion unit, each of the second voltage conversion units is used to convert the voltage output by the first voltage conversion unit, wherein: Each of the first voltage conversion units includes multiple output terminals, each of the output terminals is connected to a different power conversion circuit in the first voltage conversion unit, and at least one output terminal of the first voltage conversion unit is used to connect to a load through the second voltage conversion unit.

14. The voltage conversion device according to claim 13, characterized in that: A portion of the multiple output ends of the first voltage conversion unit is used to connect to a load, and another portion of the multiple output ends of the first voltage conversion unit is used to connect to a load through the second voltage conversion unit.

15. The voltage conversion device according to claim 13 or 14, characterized in that: Each of the multiple output ends of the first voltage conversion unit is connected to the second voltage conversion unit in a one-to-one correspondence, and the output end of the second voltage conversion unit is used to connect a load.

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