Radio frequency circuit, electronic equipment and base station

Abstract

The present application discloses a radio frequency circuit, electronic device, and base station. The radio frequency circuit includes at least one group of circuit units, each of the at least one group of circuit units includes a digital channel and a planar array panel unit; the digital channel includes N digital sub-channels, and the panel unit includes N panel sub-units. The N panel sub-units correspond one-to-one to the N digital sub-channels, where N is an integer greater than 1; wherein the N panel sub-units are used to receive N first signals sent by the N digital sub-channels and send the N first signals through N beams; and / or receive N second signals through N beams and send the N second signals to the N digital sub-channels.

Description

Technical Field

[0001] The present application relates to signal processing technology, and in particular to a radio frequency circuit, electronic equipment, and base station. Background Art

[0002] 5G systems are gradually adopting millimeter waves for wireless communications. Millimeter waves have large propagation losses, so a hybrid digital-analog beamforming solution has been introduced. This solution uses amplitude modulation and phase modulation to perform beamforming on the analog side (also called joint beamforming).

[0003] Currently, a panel unit (i.e., the analog end) can only perform joint shaping for one digital channel, meaning that a panel unit can only form one beam. When there are a large number of users and they are widely distributed, a single beam in one direction cannot meet the communication needs of multiple users. Summary of the Invention

[0004] To solve the above technical problems, the embodiments of the present application provide a radio frequency circuit, an electronic device, and a base station.

[0005] The radio frequency circuit provided in the embodiment of the present application includes at least one group of circuit units, each group of circuit units in the at least one group of circuit units includes a digital channel and a planar array panel unit; the digital channel includes N digital sub-channels, the panel unit includes N panel sub-units, the N panel sub-units correspond one-to-one to the N digital sub-channels, and N is an integer greater than 1; wherein,

[0006] The N panel sub-units are used to receive N first signals sent by the N digital sub-channels and send the N first signals through N beams; and / or receive N second signals through N beams and send the N second signals to the N digital sub-channels.

[0007] In one embodiment of the present application, when the N Panel sub-units are connected correspondingly to the N digital sub-channels, the N Panel sub-units are respectively used to perform beamforming on the N digital sub-channels to form N beams corresponding to the N digital sub-channels.

[0008] In one embodiment of the present application, each of the N Panel subunits includes P radio frequency channels, where P is a positive integer;

[0009] The P radio frequency channels are used to perform beamforming for the digital sub-channel corresponding to the Panel sub-unit to form a beam corresponding to the digital sub-channel.

[0010] In one embodiment of the present application, each group of circuit units further includes a first switch group and a second switch group, the first switch group includes N first switches, the second switch group includes N second switches, and the N first switches and the N second switches correspond one-to-one; the N digital sub-channels are connected to the N first switches in a one-to-one correspondence, and the N second switches are connected to the N panel sub-units in a one-to-one correspondence; wherein,

[0011] When the N first switches are strobed and connected to the N second switches and the N second switches are strobed and connected to the N first switches, the N panel sub-units are correspondingly connected to the N digital sub-channels.

[0012] In one embodiment of the present application, each group of circuit units further includes a bandpass filter group and a power splitter / combiner unit, the bandpass filter group includes N bandpass filters, and the N bandpass filters are connected to the N first ends of the power splitter / combiner unit in a one-to-one correspondence; wherein,

[0013] When the N first switches are connected to the N band-pass filters and the N second switches are connected to the N second terminals of the power splitter / combiner unit,

[0014] The N bandpass filters are configured to receive the N first signals sent by the N digital sub-channels and send the N first signals to the power splitter / combiner unit;

[0015] The power splitter / combiner unit is configured to combine the N first signals into one signal in the frequency domain, power split the one signal into N third signals, and send the N third signals to the N panel subunits;

[0016] The N panel sub-units are used to receive the N third signals and send the N third signals through one beam.

[0017] In one embodiment of the present application, each group of circuit units further includes a bandpass filter group and a power splitter / combiner unit, the bandpass filter group includes N bandpass filters, and the N bandpass filters are connected to the N first ends of the power splitter / combiner unit in a one-to-one correspondence; wherein,

[0018] When the N first switches are connected to the N band-pass filters and the N second switches are connected to the N second terminals of the power splitter / combiner unit,

[0019] The N panel sub-units are configured to receive N fourth signals through one beam and send the N fourth signals to the power splitter / combiner unit;

[0020] The power splitting and combining unit is configured to combine the N fourth signals into one signal in terms of power, and to split the one signal into N fifth signals and send them to the N bandpass filters;

[0021] The N band-pass filters are used to filter the N channels of fifth signals to obtain N channels of sixth signals, and send the N channels of sixth signals to the N digital sub-channels.

[0022] In one embodiment of the present application, when the N first switches are connected to the N bandpass filters and the N second switches are connected to the N second ends of the power splitter / combiner unit, the panel unit is used to perform beamforming on the digital channel to form a beam corresponding to the digital channel.

[0023] In one embodiment of the present application, the Panel unit includes N×P radio frequency channels, where P is a positive integer;

[0024] The N×P radio frequency channels are used to perform beamforming for the digital channels corresponding to the Panel units to form a beam corresponding to the digital channels.

[0025] In one embodiment of the present application, the carrier bandwidth corresponding to the digital sub-channel is 1 / N of the carrier bandwidth corresponding to the digital channel.

[0026] The electronic device provided in the embodiment of the present application includes the above-mentioned radio frequency circuit.

[0027] The base station provided in the embodiment of the present application includes the above-mentioned radio frequency circuit.

[0028] In the technical solution of the embodiment of the present application, a radio frequency circuit is proposed, which includes at least one group of circuit units, each group of circuit units in the at least one group of circuit units includes a digital channel and a panel unit; the digital channel includes N digital sub-channels, and the panel unit includes N panel sub-units. The N panel sub-units can be used to perform joint shaping on the N digital sub-channels to form N beams. In this way, for the transmitting side, the N panel sub-units receive the N first signals sent by the N digital sub-channels and send the N first signals through N beams; for the receiving side, the N panel sub-units receive the N second signals through N beams and send the N second signals to the N digital sub-channels. Since each panel unit in the radio frequency circuit can form N beams, it can meet the communication needs of a large number of users scattered in different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a digital-analog hybrid beamforming architecture for 5G millimeter wave base stations;

[0030] Figure 2 is a schematic diagram of a beam provided in an embodiment of the present application;

[0031] Figure 3 This is a schematic diagram of the structure of the radio frequency circuit provided in the embodiment of the present application. Figure 1 ;

[0032] Figure 4 This is a schematic diagram of the structure of the radio frequency circuit provided in the embodiment of the present application. Figure 2 ;

[0033] Figure 5 is a schematic diagram of a Panel subunit provided in an embodiment of the present application;

[0034] Figure 6 is a schematic diagram of a Panel unit provided in an embodiment of the present application;

[0035] Figure 7 is a schematic diagram of a digital channel provided in an embodiment of the present application;

[0036] Figure 8 This is a schematic diagram of a group of circuit units provided in an embodiment of the present application. Figure 1 ;

[0037] Figure 9 This is a schematic diagram of the structure of the radio frequency circuit provided in the embodiment of the present application. Figure 3 ;

[0038] Figure 10 is a schematic diagram of a beam provided in an embodiment of the present application;

[0039] Figure 11 This is a schematic diagram of a group of circuit units provided in an embodiment of the present application. Figure 2 ;

[0040] Figure 12 This is a schematic diagram of the structure of the radio frequency circuit provided in the embodiment of the present application. Figure 4 . DETAILED DESCRIPTION

[0041] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0042] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0043] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0044] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0045] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below.

[0047] Unlike previous 2G to 4G, 5G needs to meet a wider range of business types and scenarios. To meet the eight key performance indicators of 5G in three major scenarios defined by the International Telecommunication Union (ITU), 5G systems need to gradually adopt millimeter waves for wireless communication. Millimeter waves are mainly used to meet the extremely high user experience rates and peak capacity requirements in urban hotspots, suburban hotspots, and indoor scenarios.

[0048] Millimeter-wave propagation loss is 20-30dB higher than that of lower frequencies. To ensure coverage, higher radiated power is required. However, due to inherent semiconductor characteristics, single-channel devices in the millimeter-wave band struggle to achieve high power, necessitating an increased number of antennas to achieve a certain level of beamforming gain. Millimeter-wave bandwidth is 800MHz and above. Using the same architecture as lower frequencies would require enormous capacity for digital-to-analog converters and digital processors, making cost, size, and power consumption prohibitive. A hybrid digital-analog beamforming solution uses amplitude and phase modulation on the analog side for beamforming, and can be combined with baseband digital beamforming. The number of baseband channels is far smaller than the number of RF antennas, significantly reducing complexity, saving costs and lowering baseband processing complexity. This solution is suitable for millimeter-wave basestation beamforming.

[0049] The current 5G millimeter wave base station digital-analog hybrid beamforming architecture is as follows: Figure 1 As shown, Figure 1Taking four groups of circuit units as an example, each group consists of a digital channel and a panel unit, such as digital channel 1 and panel 1. The digital channel may include intermediate frequency (IF) components such as digital-to-analog converters (DACs) and analog-to-digital converters (ADCs), as well as filters, mixers, and local oscillators. The panel unit may also include multiple RF channels, each of which may include a phase shifter and amplitude modulator for phase shifting and amplitude modulation, thus implementing beamforming. Furthermore, it may include a power amplifier (PA), a low-noise amplifier (LNA), and an antenna array. Current 5G millimeter-wave base stations have the following characteristics: 1. Each digital channel uses wideband IF components; 2. Each digital channel corresponds to a panel unit; 3. Each panel unit has a polarization direction; and 4. Each panel unit has multiple RF channels, which are used to jointly shape a digital channel.

[0050] Figure 1 The beam formed by the 5G millimeter wave base station when the user accesses is as shown in Figure 2 As shown, four panels can form four beams in different directions, with each beam having a bandwidth of 800 MHz. Assuming the size of each panel is M (i.e., the number of RF channels included in the panel is M), and the antenna size corresponding to each panel is N (i.e., the number of antenna elements included in the panel is N), then the size of each beam involved in shaping is (M + N).

[0051] As can be seen from the above description, the current 5G millimeter wave base station architecture can implement four beams in different directions, each with an 800MHz bandwidth. Each beam can be used to frequency-divide access to different users. For example, if each beam is used to frequency-divide access to two users, each with a bandwidth of 400MHz, since these two users access one beam, they must be located in the same direction.

[0052] In the current 5G millimeter wave base station architecture, a panel unit can only form one beam. In other words, the beam formed by a panel unit can only be oriented in one direction. When the number of users in a cell is large and dispersed, and not in the same beam direction, the base station needs to access different users separately through time division. Especially when each user's service is small packets, the base station needs to frequently schedule them in different time slots, resulting in large scheduling overhead.

[0053] To this end, the following technical solution of the embodiment of the present application is proposed. The technical solution of the embodiment of the present application proposes a flexible digital-analog hybrid beamforming base station architecture, which can enable a panel unit to simultaneously access multiple users through beams in multiple directions.

[0054] It should be noted that although the above-mentioned related technologies are described using base stations as an example, the technical solutions of the embodiments of the present application are not limited to base stations. The technical solutions of the embodiments of the present application can be applied to electronic devices, which can be base stations, access network nodes, terminals, and any other devices capable of wireless communication.

[0055] An embodiment of the present application provides a radio frequency circuit, comprising at least one group of circuit units. Furthermore, the radio frequency circuit also includes a baseband, with each of the at least one group of circuit units being connected to the baseband. The baseband is configured to provide baseband signals to the at least one group of circuit units.

[0056] In one example, referring to Figure 3 The RF circuit includes four groups of circuit units, and all four groups of circuit units are connected to the baseband.

[0057] In the embodiment of the present application, each group of circuit units in the radio frequency circuit includes a digital channel and a panel unit. The structure of each group of circuit units is described in detail below.

[0058] Reference Figure 4 The circuit unit includes a digital channel 11 and a panel unit 12; the digital channel 11 includes N digital sub-channels, the panel unit 12 includes N panel sub-units, the N panel sub-units correspond one-to-one to the N digital sub-channels, and N is an integer greater than 1.

[0059] In an embodiment of the present application, when the N panel sub-units are correspondingly connected to the N digital sub-channels, the N panel sub-units are used to receive N first signals sent by the N digital sub-channels and send the N first signals through N beams; and / or, receive N second signals through N beams and send the N second signals to the N digital sub-channels.

[0060] It should be noted that when the N panel subunits are connected to the N digital subchannels, the N panel subunits are used to perform beamforming on the N digital subchannels, forming N beams corresponding to the N digital subchannels. Thus, on the transmitting side, the N panel subunits receive N first signals from the N digital subchannels and transmit the N first signals via N beams; on the receiving side, the N panel subunits receive N second signals via N beams and transmit the N second signals to the N digital subchannels.

[0061] In an embodiment of the present application, a panel subunit is used to perform beamforming on a digital subchannel, forming a beam for the digital subchannel. Specifically, a panel subunit may include P radio frequency channels, where P is a positive integer; the P radio frequency channels are used to perform beamforming on the digital subchannel corresponding to the panel subunit, forming a beam corresponding to the digital subchannel.

[0062] Reference Figure 5 , Figure 5 This is a schematic diagram of a panel subunit. A panel subunit includes multiple RF channels, which are used to beamform the corresponding digital subchannels, forming a directional beam. Each RF channel may include a phase shifter and amplitude modulator, which implement phase shifting and amplitude modulation, thus achieving beamforming. It may also include PAs, LNAs, and antenna arrays.

[0063] In one example, referring to Figure 6 A Panel unit consists of 4 Panel subunits, and the structure of each Panel subunit can refer to Figure 5 In specific implementation, a panel unit can be split into multiple sub-panel units, where the number of sub-panel units is the same as the number of digital sub-channels in the digital channel.

[0064] In the embodiment of the present application, a digital channel includes N digital sub-channels. Each digital sub-channel may include intermediate frequency components such as a DAC and an ADC, as well as filters, mixers, and local oscillators. Here, the carrier bandwidth corresponding to the digital sub-channel is 1 / N of the carrier bandwidth corresponding to the digital channel.

[0065] In one example, referring to Figure 7A digital channel consists of four digital sub-channels. The carrier bandwidth of the digital channel is 800MHz, and the carrier bandwidth of each digital sub-channel is 200MHz. In specific implementation, the intermediate frequency devices (such as DAC, ADC) in the digital sub-channel can use 200MHz intermediate frequency devices. Figure 1 For the 800 MHz intermediate frequency device shown in FIG, the 200 MHz intermediate frequency device is a narrowband intermediate frequency device, while the 800 MHz intermediate frequency device is a broadband intermediate frequency device.

[0066] In one example, Figure 6 The Panel unit shown and Figure 7 The digital channels shown in the figure form a group of circuit unit structures, which can be referred to Figure 8 shown.

[0067] In one example, referring to Figure 9 The RF circuit includes 4 groups of circuit units. The structure of each group of circuit units can refer to Figure 8 The structure shown.

[0068] In the embodiment of this application, Figure 9 The beam formed by the RF circuit shown in the figure when the user accesses is as follows Figure 10 As shown, each Panel unit can form multiple beams in different directions ( Figure 9 Take 4 beams in different directions as an example), where the bandwidth of each beam is the same as the bandwidth of the RF sub-channel (or the intermediate frequency device in the RF sub-channel) (for example, both are 200MHz). Assuming that the scale of each panel unit is M and the antenna scale corresponding to each panel unit is N, then the scale of each beam participating in the shaping is (M / 4+N / 4), so 16 beams in different directions can be formed. Figure 2 For the four beams shown, the radio frequency circuit of the embodiment of the present application can expand the number of beams, so that it can be applied to the scattered small packet multi-user scenario, reducing the scheduling overhead.

[0069] In an optional method of this application, if Figure 11 As shown, each group of circuit units further includes a first switch group and a second switch group, the first switch group includes N first switches, the second switch group includes N second switches, and the N first switches and the N second switches correspond one-to-one; the N digital sub-channels are connected one-to-one with the N first switches, and the N second switches are connected one-to-one with the N Panel sub-units; wherein, when the N first switches are connected to the N second switches and the N second switches are connected to the N first switches, the N Panel sub-units are connected to the N digital sub-channels.

[0070] In an optional method of this application, if Figure 11 As shown, each group of circuit units further includes a bandpass filter group and a power splitter / combiner unit, the bandpass filter group includes N bandpass filters, and the N bandpass filters are connected to the N first ends of the power splitter / combiner unit in a one-to-one correspondence.

[0071] In the embodiment of the present application, when the N first switches are connected to the N bandpass filters and the N second switches are connected to the N second terminals of the power splitter / combiner unit,

[0072] On the transmitting side, the N bandpass filters are used to receive the N first signals sent by the N digital sub-channels and send the N first signals to the power splitter / combiner unit; the power splitter / combiner unit is used to combine the N first signals into one signal in the frequency domain, power-split the one signal into N third signals, and send the N third signals to the N panel sub-units; the N panel sub-units are used to receive the N third signals and send the N third signals through one beam;

[0073] For the receiving side, the N panel sub-units are used to receive N fourth signals through a beam and send the N fourth signals to the power splitter / combiner unit; the power splitter / combiner unit is used to combine the N fourth signals into one signal in terms of power, and divide the one signal into N fifth signals and send them to the N band-pass filters; the N band-pass filters are used to filter the N fifth signals to obtain N sixth signals, and send the N sixth signals to the N digital sub-channels.

[0074] In an embodiment of the present application, when the N first switches are connected to the N bandpass filters and the N second switches are connected to the N second terminals of the power splitter / combiner unit, the panel unit is configured to perform beamforming on the digital channel to form a beam corresponding to the digital channel. Specifically, the panel unit 12 includes N×P RF channels, where P is a positive integer; the N×P RF channels are configured to perform beamforming on the digital channel corresponding to the panel unit to form a beam corresponding to the digital channel.

[0075] It should be noted that the in-band pass bandwidth and center frequency interval of each bandpass filter in the bandpass filter group are consistent with the bandwidth of the intermediate frequency device in the digital sub-channel, for example, both are 200 MHz.

[0076] In one example, referring to Figure 12 The RF circuit includes 4 groups of circuit units. The structure of each group of circuit units can refer to Figure 10 The structure shown. Figure 12 For the RF circuit shown, the first switch group is used to select whether to connect to the second switch group or the bandpass filter group, and the second switch group is used to select whether to connect to the first switch group or the power splitter / combiner unit. The power splitter / combiner unit connects two power splitters (combiners) to form a multi-input multi-output module. Each end on the left side of the power splitter / combiner unit (called the first end) is connected to a bandpass filter, and each end on the right side (called the second end) is connected to the second switch group.

[0077] In the embodiment of the present application, when the first switch group is connected to the bandpass filter group and the second switch group is connected to the power splitter / combiner unit, the RF circuit can implement the following first beamforming mode. When the first switch group is connected to the second switch group and the second switch group is connected to the first switch group, the RF circuit can implement the following second beamforming mode.

[0078] First way:

[0079] Assume that the cell bandwidth is 800MHz. Figure 12 As shown, both the first switch group and the second switch group select the dotted path. At this time, for each digital channel, it is equivalent to combining multiple narrow-band IF devices of multiple digital sub-channels into a single broadband IF device (for example, four 200MHz narrow-band IF devices are combined into an 800MHz broadband IF device in the figure). For each Panel unit, an 800MHz bandwidth signal is accessed.

[0080] On the transmitting side, the baseband 800MHz broadband signal is processed in parallel by the digital channel and frequency-combined in the power splitter / combiner unit. When entering the second switch group, the signal of each panel unit is an 800MHz broadband signal.

[0081] On the receiving side, the 800MHz broadband signal received by the panel unit passes through the bandpass filter and enters the first switch group. The four signals are converted into 200MHz narrowband signals in adjacent frequency bands, and then enter the narrowband intermediate frequency device for processing.

[0082] The first method is equivalent to Figure 1 The RF architecture shown is Figure 1 The difference between the RF architectures shown is that the RF channel in the first method is split into multiple RF sub-channels, that is, the broadband IF device is split into multiple narrowband IF devices. Since the broadband signal is processed in parallel by multiple narrowband IF devices, the timing synchronization requirements of the multiple narrowband IF devices are high. When the equipment leaves the factory, each RF sub-channel can be calibrated to compensate for the phase error of different RF sub-channels.

[0083] Second way:

[0084] Assume that the cell bandwidth is 800MHz. Figure 12 As shown, both the first switch group and the second switch group select the solid line path. At this time, for each digital channel, it is equivalent to splitting the broadband digital channel into multiple narrowband digital sub-channels (for example, four 200MHz digital sub-channels); for each Panel unit, it is equivalent to splitting the Panel unit into multiple Panel sub-units (for example, four Panel sub-units), and each narrowband digital sub-channel is connected to a Panel sub-unit.

[0085] The second method is equivalent to Figure 9 The RF architecture is shown.

[0086] In the embodiment of the present application, the above two methods can be flexibly configured according to the application scenario. The first method can achieve the same effect as the current base station architecture, and the second method can greatly expand the number of beams in different directions to meet the communication needs of more users scattered in different directions.

[0087] An embodiment of the present application further provides an electronic device, which includes a radio frequency circuit. The structure of the radio frequency circuit in the electronic device can refer to the technical solutions related to the above embodiments of the present application.

[0088] An embodiment of the present application further provides a base station, which includes a radio frequency circuit. The structure of the radio frequency circuit in the electronic device can refer to the technical solutions related to the above embodiments of the present application.

[0089] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments.

[0090] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0091] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0092] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0093] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0094] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0095] 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 circuit, characterized in that: The radio frequency circuit includes at least one group of circuit units, each group of circuit units in the at least one group of circuit units includes a digital channel and a planar array panel unit; the digital channel includes N digital sub-channels, and the carrier bandwidth corresponding to the digital sub-channel is 1 / N of the carrier bandwidth corresponding to the digital channel; the panel unit includes N panel sub-units, and the N panel sub-units correspond to the N digital sub-channels one-to-one, where N is an integer greater than 1; wherein, The N panel sub-units are configured to receive N first signals sent by the N digital sub-channels and send the N first signals through N beams; and / or receive N second signals through N beams and send the N second signals to the N digital sub-channels; Each group of circuit units further includes a first switch group, a second switch group, a bandpass filter group and a power splitter / combiner unit. When the first switch group is connected to the bandpass filter group and the second switch group is connected to the power splitter / combiner unit, The bandpass filter group is configured to receive N first signals sent by the N digital sub-channels and send the N first signals to the power splitter / combiner unit; The power splitter / combiner unit is configured to combine the N first signals into one signal in the frequency domain, power split the one signal into N third signals, and send the N third signals to the N panel subunits; The N panel sub-units are used to receive the N third signals and send the N third signals through one beam.

2. The radio frequency circuit according to claim 1, wherein: When the N panel sub-units are connected correspondingly to the N digital sub-channels, the N panel sub-units are respectively used to perform beamforming on the N digital sub-channels to form N beams corresponding to the N digital sub-channels.

3. The radio frequency circuit according to claim 2, characterized in that: Each of the N Panel sub-units includes P radio frequency channels, where P is a positive integer; The P radio frequency channels are used to perform beamforming for the digital sub-channel corresponding to the Panel sub-unit to form a beam corresponding to the digital sub-channel.

4. The radio frequency circuit according to claim 2, wherein: The first switch group includes N first switches, the second switch group includes N second switches, the N first switches and the N second switches are in one-to-one correspondence; the N digital sub-channels are connected to the N first switches in one-to-one correspondence, and the N second switches are connected to the N panel sub-units in one-to-one correspondence; wherein, When the N first switches are strobed and connected to the N second switches and the N second switches are strobed and connected to the N first switches, the N panel sub-units are correspondingly connected to the N digital sub-channels.

5. The radio frequency circuit according to claim 4, characterized in that: The bandpass filter group includes N bandpass filters, and the N bandpass filters are connected to the N first ends of the power splitter / combiner units in a one-to-one correspondence; wherein the first switch group is connected to the bandpass filter group and the second switch group is connected to the power splitter / combiner units in a gated manner, including: The N first switches are connected to the N band-pass filters and the N second switches are connected to the N second ends of the power splitter / combiner units; The N band-pass filters are used to receive N first signals sent by the N digital sub-channels, and send the N first signals to the power splitter / combiner unit.

6. The radio frequency circuit according to claim 4, characterized in that: The bandpass filter group includes N bandpass filters, and the N bandpass filters are connected to the N first ends of the power splitter / combiner units in a one-to-one correspondence; wherein the first switch group is connected to the bandpass filter group and the second switch group is connected to the power splitter / combiner units in a gated manner, comprising: The N first switches are connected to the N band-pass filters and the N second switches are connected to the N second terminals of the power splitter / combiner units. The N panel sub-units are further configured to receive N fourth signals through one beam and send the N fourth signals to the power splitter / combiner unit; The power splitter / combiner unit is further configured to combine the N fourth signals into one signal in terms of power, and to split the one signal into N fifth signals and send them to the N bandpass filters; The N band-pass filters are further configured to filter the N channels of fifth signals to obtain N channels of sixth signals, and send the N channels of sixth signals to the N digital sub-channels.

7. The radio frequency circuit according to claim 5 or 6, characterized in that: When the N first switches are connected to the N bandpass filters and the N second switches are connected to the N second ends of the power splitter / combiner unit, the panel unit is used to perform beamforming on the digital channel to form a beam corresponding to the digital channel.

8. The radio frequency circuit according to claim 7, characterized in that: The Panel unit includes N×P radio frequency channels, where P is a positive integer; The N×P radio frequency channels are used to perform beamforming for the digital channels corresponding to the Panel units to form a beam corresponding to the digital channels.

9. An electronic device, characterized in that: The electronic device comprises the radio frequency circuit according to any one of claims 1 to 8.

10. A base station, characterized in that: The base station comprises the radio frequency circuit according to any one of claims 1 to 8.

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