CN112272044B - Radio frequency circuit and electronic equipment - Google Patents
Radio frequency circuit and electronic equipment Download PDFInfo
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- CN112272044B CN112272044B CN202011156094.3A CN202011156094A CN112272044B CN 112272044 B CN112272044 B CN 112272044B CN 202011156094 A CN202011156094 A CN 202011156094A CN 112272044 B CN112272044 B CN 112272044B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Abstract
The application provides a radio frequency circuit and electronic equipment, wherein the radio frequency circuit comprises a radio frequency transceiver, a first radio frequency transceiver module, a second radio frequency transceiver module, a first radio frequency receiving module, a second radio frequency receiving module, a switch module and an antenna array; the radio frequency transceiver comprises a first local vibration source, a power divider, a first switch, a first baseband signal generator, a first frequency mixer, a second local vibration source, a second switch, a second baseband signal generator, a second frequency mixer and a third local vibration source; under the control of the first switch and the second switch, the radio frequency circuit can be switched among a plurality of states, wherein the plurality of states comprise a first state and a second state, the first local vibration source is conducted with the first radio frequency transceiving module and the second radio frequency transceiving module in the first state, the second local vibration source is conducted with the first radio frequency transceiving module in the second state, and the third local vibration source is conducted with the second radio frequency transceiving module. The embodiment of the application can improve the flexibility of the design of the radio frequency circuit.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a radio frequency circuit and an electronic device.
Background
With the rapid development of internet communication technology and the increasing popularity of electronic devices, the demand of users for data traffic is increasing. The transmission rate from 4G is 100Mbps to 1Gbps, the peak transmission rate to 5G NR can reach 20Gbps, and the improvement of the rate requires a key technology that 5G must have 4 × 4 Multiple Input Multiple Output (MIMO).
Fig. 1 is a schematic structural diagram of a radio frequency circuit of a 5G-capable electronic device in the related art, where the circuit architecture is used to implement that two-transceiver four-transceiver 2T4R is compatible with one-transceiver four-transceiver 1T 4R. The radio frequency transmitting signal is a signal obtained by mixing a local oscillator signal and a baseband signal. The radio frequency circuit comprises a radio frequency transceiver, the radio frequency transceiver comprises a local oscillation source, and the local oscillation source is used for generating local oscillation signals. In the process of implementing the present application, the inventors found that at least the following problems exist in the related art: in order to make local oscillation signals of four antennas the same during transmission, a switch for switching the antennas for transmission at the rear end of the radio frequency circuit in the related art needs to be a four-pole four-throw switch, so that the radio frequency circuit is single in design structure and poor in flexibility.
Disclosure of Invention
The embodiment of the application provides a radio frequency circuit and electronic equipment, and can solve the technical problems that the design structure of the radio frequency circuit is single and the flexibility is poor in the related technology.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present application provides a radio frequency circuit, where the radio frequency circuit includes a radio frequency transceiver, a first radio frequency transceiver module, a second radio frequency transceiver module, a first radio frequency receiving module, a second radio frequency receiving module, a switch module, and an antenna array;
the radio frequency transceiver comprises a first local vibration source, a power divider, a first switch, a first baseband signal generator, a first frequency mixer, a second local vibration source, a second switch, a second baseband signal generator, a second frequency mixer and a third local vibration source;
the first local vibration source is connected to the first input end of the first switch and the first input end of the second switch through the power splitter, the second local vibration source is connected to the second input end of the first switch, the output end of the first switch is connected to the first end of the first mixer, the first baseband signal generator is connected to the first end of the first rf transceiver module through the second end of the first mixer, the third local vibration source is connected to the second input end of the second switch, the output end of the second switch is connected to the first end of the second mixer, and the second baseband signal generator is connected to the first end of the second rf transceiver module through the second end of the second mixer;
the first end of the first radio frequency receiving module and the first end of the second radio frequency receiving module are both connected with the radio frequency transceiver, and the second end of the first radio frequency receiving module, the second end of the second radio frequency receiving module, the second end of the first radio frequency receiving module and the second end of the second radio frequency receiving module are both connected with the antenna array through the switch module;
under the control of the first switch and the second switch, the radio frequency circuit can be switched between a plurality of states, the plurality of states include a first state and a second state, in the first state, the first local vibration source is conducted with the first radio frequency transceiver module and the second radio frequency transceiver module, in the second state, the second local vibration source is conducted with the first radio frequency transceiver module, and the third local vibration source is conducted with the second radio frequency transceiver module.
In a second aspect, an embodiment of the present application provides an electronic device, which includes the radio frequency circuit described in the first aspect.
In the embodiment of the application, the first local vibration source is connected with the two radio frequency transceiver modules through the power divider, and provides the same local vibration signals for the two radio frequency transceiver modules, so that the situation that a switch used for switching the transmitting antenna at the rear end needs to be a four-pole four-throw switch can be avoided, and the flexibility of radio frequency circuit design can be improved.
Drawings
FIG. 1 is a schematic diagram of an RF circuit in the related art;
fig. 2 is a schematic diagram of a networking architecture according to an embodiment of the present application;
fig. 3 is a second schematic diagram of a networking architecture according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a radio frequency circuit according to an embodiment of the present disclosure;
fig. 5 is a second schematic structural diagram of an rf circuit according to an embodiment of the present application;
fig. 6 is one of schematic antenna layouts of an electronic device according to an embodiment of the present disclosure;
fig. 7 is a third schematic diagram illustrating a structure of a radio frequency circuit according to an embodiment of the present application;
fig. 8 is a second schematic diagram of an antenna layout of an electronic device according to an embodiment of the present application;
fig. 9 is a fourth schematic structural diagram of an rf circuit according to an embodiment of the present application;
fig. 10 is a third schematic view of an antenna layout of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/", and generally means that the former and latter related objects are in an "or" relationship.
The radio frequency circuit can be used for fifth generation mobile communication (5G). The 5G has the technical characteristics of high speed, low time delay and large connection. For 5G terminal devices, in order to realize an ultra-high network rate, downlink 4 × 4MIMO (Multiple Input Multiple Output), UL 2 × 2 MIMO, SRS (Sounding Reference Signal), 1024QAM, 4-Way ASDiV (Antenna Switching Diversity), and the like have been introduced. In addition, because of network evolution from 4G to 5G, the 5G networking mode can be divided into two modes, NSA and SA. As shown in fig. 2, NSA is a non-independent networking mode, and uses a 4G base station as a primary station and a 5G base station as a secondary station with the help of a current 4G core network; as shown in fig. 3, SA is an independent networking mode, and only 5G base stations are connected to a 5G core network. For 5G terminals, two networking modes of SA and NSA are simultaneously supported. In the networking mode of NSA, only one TX path, four RX paths and SRS require to realize the function of 1T 4R; in the networking mode of the SA, there are two TX paths and four RX paths, and the SRS requires to implement a 2T4R function, and may also support a 1T4R function. The radio frequency circuit in this embodiment can realize that the two-transmission four-reception 2T4R is compatible with the one-transmission four-reception 1T 4R.
It should be noted that, for the radio frequency circuit shown in fig. 1 in the related art, in the NSA mode, to support SRS 1T4R and 4-Way ASDiV, the TX0 path needs to be cut to four antennas through the switch array (SW) at the back end. Due to the layout and space of the antennas, the trace difference of the TX0 path cut to 4 antennas is very large, and as shown in table 1, the trace difference is 5.5dB at most.
TABLE 1
Table 1 shows the loss diff (loss difference) of the radio frequency circuit under different configurations and different RX (transmit receive) module operations under three bands of N41, N78, and N79, and PRX, DRX, PRX MIMO, and DRX MIMO are different transmit receive modules of the radio frequency circuit.
For the radio frequency circuit shown in fig. 1, when SRS is transmitted in a 1T4R round, the problem of inaccurate evaluation is caused by large wiring differences, and the maximum throughput is directly affected by the inaccurate SRS evaluation; when four antennas are switched, the large wiring difference can cause the switched antennas to reside on poor antennas, and the experience is influenced; and the difference of the four routes is large, which means that the path loss of the radio frequency circuit is too large, and the large loss directly causes the problems of large power consumption, reduced maximum transmitting power, reduced signal quality and the like.
The radio frequency circuit provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a radio frequency circuit provided in the embodiment of the present application, and as shown in fig. 4, the radio frequency circuit includes a radio frequency transceiver 1, a first radio frequency transceiver module 2, a second radio frequency transceiver module 3, a first radio frequency receiving module 4, a second radio frequency receiving module 5, a switch module 6, and an antenna array 7;
the radio frequency transceiver 1 comprises a first local oscillation source 11, a power divider 12, a first switch 13, a first baseband signal generator 14, a first mixer 15, a second local oscillation source 16, a second switch 17, a second baseband signal generator 18, a second mixer 19 and a third local oscillation source 20;
the first local oscillator 11 is connected to a first input terminal of the first switch 13 and a first input terminal of the second switch 17 through the power divider 12, the second local oscillator 16 is connected to a second input terminal of the first switch 13, an output terminal of the first switch 13 is connected to a first terminal of the first mixer 15, the first baseband signal generator 14 is connected to a first terminal of the first rf transceiver module 2 through a second terminal of the first mixer 15, the third local oscillator 20 is connected to a second input terminal of the second switch 17, an output terminal of the second switch 17 is connected to a first terminal of the second mixer 19, and the second baseband signal generator 18 is connected to a first terminal of the second rf transceiver module 3 through a second terminal of the second mixer 19;
a first end of the first rf receiving module 4 and a first end of the second rf receiving module 5 are both connected to the rf transceiver 1, and a second end of the first rf transceiver module 2, a second end of the second rf transceiver module 3, a second end of the first rf receiving module 4, and a second end of the second rf receiving module 5 are both connected to the antenna array 7 through the switch module 6;
under the control of the first switch 13 and the second switch 17, the radio frequency circuit may be switched between a plurality of states, where the plurality of states include a first state and a second state, in the first state, the first local vibration source 11 is conducted with the first radio frequency transceiver module 2 and the second radio frequency transceiver module 3, in the second state, the second local vibration source 16 is conducted with the first radio frequency transceiver module 2, and the third local vibration source 20 is conducted with the second radio frequency transceiver module 3.
The first local oscillator 11 may be configured to generate a local oscillator signal. The power divider 12 may be configured to divide the local oscillation signal generated by the first local oscillation source 11 into multiple paths of signals. Both the first baseband signal generator 14 and the second baseband signal generator 18 may be used to generate baseband signals. Both the first mixer 15 and the second mixer 19 may be configured to mix multiple input signals and output the mixed signals. The second and third local oscillator sources 16, 20 may be used to generate local oscillator signals. The switch module 6 may comprise a first double pole double throw switch and a second double pole double throw switch; or may comprise a first single pole, triple throw switch; or may comprise a second single pole, triple throw switch; and so on.
In addition, the radio frequency circuit in this embodiment can support two networking modes, namely, an NSA mode and an SA mode, and realizes compatibility of two-transmission four-reception 2T4R with one-transmission four-reception 1T 4R.
The radio frequency circuit in this embodiment supports SRS 1T4R and four-antenna switching in the NSA mode. When radio frequency transmission is performed, the first switch 13 may be controlled to conduct the first local vibration source 11 and the first radio frequency transceiver module 2, and the second switch 17 may be controlled to conduct the first local vibration source 11 and the second radio frequency transceiver module 3. Because of the common first local oscillator 11, TX0 for performing frequency mixing output on the baseband signal of the first baseband signal generator 14 and the local oscillator signal of the first local oscillator 11, and TX1 for performing frequency mixing output on the baseband signal of the second baseband signal generator 18 and the local oscillator signal of the first local oscillator 11 are two paths of the same TX signals. In the related art, if TX0 and TX1 are not the same TX signal, the switch module 6 needs to be a four-pole four-throw switch to realize 1T4R and four-antenna switching. In this embodiment, two identical TX signals are output through the rf transceiver support, so that the switch module 6 may include a first double-pole double-throw switch and a second double-pole double-throw switch, or may include a first single-pole three-throw switch, and so on, and is not necessarily limited to a four-pole four-throw switch.
The radio frequency circuit in this embodiment simultaneously supports two different TX signals in the SA mode, and can implement two-transmission and four-reception 2T 4R. When radio frequency transmission is performed, the first switch 13 may be controlled to conduct the second local vibration source 16 and the first radio frequency transceiver module 2, and the second switch 17 may be controlled to conduct the third local vibration source 20 and the second radio frequency transceiver module 3. Since the second local oscillation source 16 and the third local oscillation source 20 are different local oscillation sources, TX0 for performing frequency mixing output on the baseband signal of the first baseband signal generator 14 and the local oscillation signal of the second local oscillation source 16, and TX1 for performing frequency mixing output on the baseband signal of the second baseband signal generator 18 and the local oscillation signal of the third local oscillation source 20 are two paths of different TX signals, so that two-transmission four-reception 2T4R can be realized.
The radio frequency circuit in the embodiment of the application has the advantage that an uplink path is reconfigurable. As shown in fig. 4, by adding the first local oscillator source 11 in the radio frequency transceiver 1, the first local oscillator source 11 is connected to two channels of a TX0 and a TX1 through a power divider 12, and outputs a TX signal of the first local oscillator source 11 after being mixed with two baseband signals TX0_ BB and TX1_ BB, respectively. The two baseband signals TX0_ BB and TX1_ BB send the same data without substantial difference, and generate two rf signals TX0 and TX1 after mixing by the local oscillation signal of the first local oscillation source 11. The TX0 and TX1 signals are output from two TX ports, but are actually one signal because of the common first local oscillator 11. The TX0 and TX1 signals are selected according to the corresponding relation between the radio frequency paths and the antennas, the corresponding radio frequency paths are sent to the corresponding antennas, channel reconstruction is achieved, the requirement that different radio frequency paths cover different antennas is met, a switch which is used for switching the antennas for transmission at the rear end is not limited to be a four-pole four-throw switch, and therefore path loss of the radio frequency circuit can be reduced, and radio frequency power consumption is reduced; in addition, in order to make the local oscillation signals of the four antennas the same during transmission, the switch used for switching the antenna for transmission at the rear end in the radio frequency circuit can be a single-pole triple-throw switch or a double-pole double-throw switch, and the like, so that the flexibility of the design of the radio frequency circuit can be improved.
In this embodiment of the application, the first local vibration source 11 is connected to the two rf transceiver modules through the power splitter 12, and the first local vibration source 11 provides the same local vibration signal for the two rf transceiver modules, so that it can be avoided that a switch at the rear end for switching the transmitting antenna needs to be a four-pole four-throw switch, thereby improving the flexibility of the rf circuit design.
Optionally, the first switch 13 is a single-pole double-throw switch, and the second switch 17 is a single-pole double-throw switch.
In this embodiment, the first switch 13 is a single-pole double-throw switch, the second switch 17 is a single-pole double-throw switch, a first active end of the first switch 13 is connected to the power divider 12, a first input end of the second switch 17 is connected, a second active end of the first switch 13 is connected to the second local oscillation source 16, and a fixed end of the first switch 13 is connected to a first end of the first mixer 15; a first active end of the second switch 17 is connected to the power divider 12, a second active end of the second switch 17 is connected to the third local oscillation source 20, and a fixed end of the second switch 17 is connected to a first end of the second mixer 19.
In this way, the local oscillation signal of the first local oscillation source 11 and the baseband signal of the first baseband signal generator 14 can be controlled to be mixed by the single-pole double-throw switch, or the local oscillation signal of the second local oscillation source 16 and the baseband signal of the second baseband signal generator 18 can be controlled to be mixed by the single-pole double-throw switch, so that the radio frequency circuit can be applied to the NSA mode and the SA mode.
Optionally, the antenna array 7 includes a first antenna 71, a second antenna 72, a third antenna 73, and a fourth antenna 74, and the first antenna 71, the second antenna 72, the third antenna 73, and the fourth antenna 74 are all connected to the switch module 6.
In this embodiment, the radio frequency circuit may be configured to implement compatibility of two-transceiver four-transceiver 2T4R with one-transceiver four-transceiver 1T4R through the first antenna 71, the second antenna 72, the third antenna 73 and the fourth antenna 74.
Optionally, as shown in fig. 5, the first radio frequency transceiver module 2 includes a first power amplifier 21, and an input end of the first power amplifier 21 is connected to the first mixer 15 through a third switch 8.
The second radio frequency transceiver module 3 includes a second power amplifier 31, and an input end of the second power amplifier 31 is connected to the second mixer 19 through a fourth switch 9.
The third switch 8 may be connected to the first mixer 15 via a low-pass filter, and the fourth switch 9 may be connected to the second mixer 19 via a low-pass filter.
In this embodiment, the third switch 8 and the fourth switch 9 respectively control whether the first power amplifier 21 and the second power amplifier 31 operate, so that the first radio frequency transceiver module 2 and/or the second radio frequency transceiver module 3 are controlled to transmit radio frequency signals in the process of transmitting radio frequency signals.
Optionally, as shown in fig. 5, the switch module 6 includes a first double-pole double-throw switch 61 and a second double-pole double-throw switch 62, the second end of the first radio frequency transceiver module 2 and the second end of the first radio frequency receiver module 4 are both connected to the first antenna 71 and the second antenna 72 through the first double-pole double-throw switch 61, and the second end of the second radio frequency transceiver module 3 and the second end of the second radio frequency receiver module 5 are both connected to the third antenna 73 and the fourth antenna 74 through the second double-pole double-throw switch 62.
As shown in fig. 5, the first local vibration source 11 and the power divider 12 are connected to the first baseband signal generator 14 through the first switch 13, and connected to the second baseband signal generator 18 through the second switch 17, and after being mixed with the two baseband signals TX0_ BB and TX1_ BB, respectively, the two signals TX0_ BB and TX1_ BB output two TX signals, that is, TX0 and TX1 signals, which are common to the first local vibration source 11, and the TX0 and TX1 signals select the corresponding radio frequency channel to be transmitted to the corresponding antenna according to the corresponding relationship between the radio frequency channel and the antenna, so that the purpose that one local vibration source covers two radio frequency channels can be achieved.
In addition, the radio frequency circuit may be used in an antenna layout as shown in fig. 6, where the first antenna 71 and the second antenna 72 are in the upper half of the electronic device, and the path loss of the TX0 path to the first antenna 71 and the second antenna 72 is small; the third antenna 73 and the fourth antenna 74 are in the lower half of the electronic device and the path loss of the TX1 path to the third antenna 73 and the fourth antenna 74 is small.
It should be noted that, in the NSA mode, SRS 1T4R and four-antenna switching need to be supported, the first switch 13 may be controlled to turn on the first local oscillation source 11 and the first radio frequency transceiver module 2, and the second switch 17 may be controlled to turn on the first local oscillation source 11 and the second radio frequency transceiver module 3, so that a baseband signal of the first baseband signal generator 14 is mixed with a local oscillation signal of the first local oscillation source 11, and a baseband signal of the second baseband signal generator 18 is mixed with a local oscillation signal of the first local oscillation source 11. In the NSA mode, if the TX path needs to be switched to the first antenna 71 and the second antenna 72, the third switch 8 is controlled to be closed, the fourth switch 9 is controlled to be opened, and the TX signal passes through the path of the first power amplifier 21 to the first antenna 71 and the second antenna 72, so that the path loss can be reduced; in NSA mode, if the TX path needs to be switched to the third antenna 73 and the fourth antenna 74, the fourth switch 9 is controlled to be closed, the third switch 8 is controlled to be opened, and the TX signal passes through the path of the second power amplifier 31 to the third antenna 73 and the fourth antenna 74, so that the path loss can be reduced.
Further, in the SA mode, two TX signals need to be simultaneously supported, the first switch 13 may be controlled to turn on the second local oscillation source 16 and the first radio frequency transceiver module 2, and the second switch 17 may be controlled to turn on the third local oscillation source 20 and the second radio frequency transceiver module 3, so that the baseband signal of the first baseband signal generator 14 and the local oscillation signal of the second local oscillation source 16 are mixed, and the baseband signal of the second baseband signal generator 18 and the local oscillation signal of the third local oscillation source 20 are mixed. The third switch 8 and the fourth switch 9 may be controlled to be closed so that the TX0 signal passes through the path of the first power amplifier 21 to the first antenna 71 and the second antenna 72 and the TX1 signal passes through the path of the second power amplifier 31 to the third antenna 73 and the fourth antenna 74.
Through uplink path reconstruction, in the scenario of 1T4R, the TX signal passes through the path of the first power amplifier 21 to the first antenna 71 and the second antenna 72, or the TX signal passes through the path of the second power amplifier 31 to the third antenna 73 and the fourth antenna 74, so that the TX signal passing through the first power amplifier 21 to the first antenna 71, the second antenna 72, the third antenna 73 and the fourth antenna 74 through a four-pole four-throw switch is avoided. The path loss at the rear end of the radio frequency circuit can be reduced, the performance is improved, and the power consumption is reduced; the complexity of the switch can be reduced, the switch at the rear end can be replaced by two DPDTs from 4P4T, and the cost, the occupied area and the path loss can be improved; and the routing difference of 4 paths can be reduced, and the influence of unbalance caused by the routing difference on antenna switching is reduced.
In this embodiment, the first rf transceiver module 2 can transmit the rf transmission signal through the first antenna 71 and the second antenna 72, and the second rf transceiver module 3 can transmit the rf transmission signal through the third antenna 73 and the fourth antenna 74, so that a 1T4R scenario can be realized through the first double-pole double-throw switch 61 and the second double-pole double-throw switch 62, and the use of a four-pole four-throw switch is avoided, thereby reducing path loss, improving the rf transmission performance, and reducing the rf power consumption.
Optionally, the switch module 6 includes a first single-pole double-throw switch and a second single-pole double-throw switch, the second end of the first rf receiving module 4 is connected to the second antenna 72 through the first single-pole double-throw switch, and the second end of the second rf receiving module 5 is connected to the fourth antenna 74 through the second single-pole double-throw switch.
The first rf receiving module 4 may include a power amplifier and a band pass filter, the power amplifier is connected to the rf transceiver 1, and the power amplifier is connected to the switching module 6 through the band pass filter. The second rf receiving module 5 may include a power amplifier and a band pass filter, the power amplifier is connected with the rf transceiver 1, and the power amplifier is connected with the switch module 6 through the band pass filter.
In addition, a first active end of the first single-pole double-throw switch is connected to the second end of the first rf receiving module 4, a fixed end of the first single-pole double-throw switch is connected to the second antenna 72, and a second active end of the first single-pole double-throw switch is connected to the second rf transceiving module 3 or the first rf transceiving module 2; a first active end of the second single-pole double-throw switch is connected with a second end of the second radio frequency receiving module 5, a fixed end of the second single-pole double-throw switch is connected with the fourth antenna 74, and a second active end of the second single-pole double-throw switch is connected with the second radio frequency receiving module 5 or the second radio frequency transceiving module 3.
In this embodiment, the second antenna 72 can be controlled by the first single pole double throw switch for rf transmission or rf reception, and the fourth antenna 74 can be controlled by the second single pole double throw switch for rf transmission or rf reception.
Optionally, as shown in fig. 7, the switch module 6 further includes a first single-pole-three-throw switch 63, a second end of the first rf transceiver module 2 is connected to a first antenna 71, and a second end of the second rf transceiver module 3 is respectively connected to a second antenna 72, a third antenna 73, and a fourth antenna 74 through the first single-pole-three-throw switch 63.
As shown in fig. 7, the first local oscillation source 11 and the power divider 12 are connected to the first baseband signal generator 14 through the first switch 13, and connected to the second baseband signal generator 18 through the second switch 17, and after being mixed with the two baseband signals TX0_ BB and TX1_ BB, respectively, the two TX signals, that is, TX0 and TX1 signals, sharing the first local oscillation source 11 are output, and the TX0 and TX1 signals select the corresponding radio frequency path to send to the corresponding antenna according to the corresponding relationship between the radio frequency path and the antenna, so that the purpose that one local oscillation source covers the two radio frequency paths can be achieved.
In addition, the rf circuit may be used in an antenna layout as shown in fig. 8, where the first antenna 71 is in the upper half of the electronic device, and the path loss of the TX0 path to the first antenna 71 is small; the second antenna 72, the third antenna 73 and the fourth antenna 74 are in the lower half of the electronic device, and the path loss of the TX1 path to the second antenna 72, the third antenna 73 and the fourth antenna 74 is small.
It should be noted that, in the NSA mode, SRS 1T4R and four-antenna switching need to be supported, the first switch 13 may be controlled to turn on the first local oscillation source 11 and the first radio frequency transceiver module 2, and the second switch 17 may be controlled to turn on the first local oscillation source 11 and the second radio frequency transceiver module 3, so that a baseband signal of the first baseband signal generator 14 is mixed with a local oscillation signal of the first local oscillation source 11, and a baseband signal of the second baseband signal generator 18 is mixed with a local oscillation signal of the first local oscillation source 11. In the NSA mode, if the TX path needs to be switched to the first antenna 71, the third switch 8 is controlled to be closed, the fourth switch 9 is controlled to be opened, and the TX signal passes through the path of the first power amplifier 21 to reach the first antenna 71, so that the path loss can be reduced; in the NSA mode, if the TX path needs to be switched to the second antenna 72, the third antenna 73 and the fourth antenna 74, the fourth switch 9 is controlled to be closed, the third switch 8 is controlled to be opened, and the TX signal passes through the path of the second power amplifier 31 to the second antenna 72, the third antenna 73 and the fourth antenna 74, so that the path loss can be reduced.
Further, in the SA mode, two TX signals need to be simultaneously supported, the first switch 13 may be controlled to turn on the second local oscillation source 16 and the first radio frequency transceiver module 2, and the second switch 17 may be controlled to turn on the third local oscillation source 20 and the second radio frequency transceiver module 3, so that the baseband signal of the first baseband signal generator 14 and the local oscillation signal of the second local oscillation source 16 are mixed, and the baseband signal of the second baseband signal generator 18 and the local oscillation signal of the third local oscillation source 20 are mixed. The third switch 8 and the fourth switch 9 may be controlled to be closed so that the TX0 signal passes through the path of the first power amplifier 21 to the first antenna 71 and the TX1 signal passes through the path of the second power amplifier 31 to the second antenna 72, the third antenna 73 and the fourth antenna 74.
Through the uplink path reconstruction, the TX signal is enabled to pass through the first power amplifier 21 to the first antenna 71 under the scenario of 1T4R, or the TX signal is enabled to pass through the second power amplifier 31 to the second antenna 72, the third antenna 73 and the fourth antenna 74, so that the TX signal is prevented from passing through the first power amplifier 21 to the first antenna 71, the second antenna 72, the third antenna 73 and the fourth antenna 74 through the four-pole four-throw switch. The path loss at the rear end of the radio frequency circuit can be reduced, the performance is improved, and the power consumption is reduced; the complexity of the switch can be reduced, the switch at the rear end can be changed from 4P4T to SP3T, and the cost, the occupied area and the path loss can be improved; and the routing difference of 4 paths can be reduced, and the influence of unbalance caused by the routing difference on antenna switching is reduced.
It should be noted that a fixed end of the first single-pole-three-throw switch 63 is connected to a second end of the second rf transceiver module 3, a first active end of the first single-pole-three-throw switch 63 is connected to the second antenna 72 through the first single-pole-two-throw switch, a second active end of the first single-pole-three-throw switch 63 is connected to the third antenna 73, and a third active end of the first single-pole-three-throw switch 63 is connected to the fourth antenna 74.
In addition, in this embodiment, the fixed terminal of the first single-pole double-throw switch may be connected to the second antenna 72, the first active terminal of the first single-pole double-throw switch may be connected to the first rf receiving module 4, and the second active terminal of the first single-pole double-throw switch may be connected to the second rf transceiving module 3 through the first single-pole double-throw switch 63. The fixed end of the second single-pole double-throw switch may be connected to the fourth antenna 74, the first active end of the second single-pole double-throw switch may be connected to the second rf receiving module 5, and the second active end of the second single-pole double-throw switch may be connected to the second rf transceiving module 3.
In this embodiment, the first rf transceiver module 2 can transmit the rf transmission signal through the first antenna 71, and the second rf transceiver module 3 can transmit the rf transmission signal through the second antenna 72, the third antenna 73, and the fourth antenna 74, so that a 1T4R scenario can be implemented by the first single-pole-three-throw switch 63, and a four-pole-four-throw switch is not used, thereby reducing path loss, improving the rf transmission performance, and reducing the rf power consumption.
Optionally, as shown in fig. 9, the switch module 6 further includes a second single-pole-three-throw switch 64, the second end of the first rf transceiver module 2 is connected to the first antenna 71, the second antenna 72 and the third antenna 73 through the second single-pole-three-throw switch 64, respectively, and the second end of the second rf transceiver module 3 is connected to the third antenna 73.
As shown in fig. 9, the first local vibration source 11 and the power divider 12 are connected to the first baseband signal generator 14 through the first switch 13, and connected to the second baseband signal generator 18 through the second switch 17, and after being mixed with the two baseband signals TX0_ BB and TX1_ BB, respectively, the two signals TX0_ BB and TX1_ BB output two TX signals, that is, TX0 and TX1 signals, which are common to the first local vibration source 11, and the TX0 and TX1 signals select the corresponding radio frequency channel to be transmitted to the corresponding antenna according to the corresponding relationship between the radio frequency channel and the antenna, so that the purpose that one local vibration source covers two radio frequency channels can be achieved.
In addition, the radio frequency circuit can be used in an antenna layout as shown in fig. 10, the first antenna 71, the second antenna 72 and the third antenna 73 are on the upper half part of the electronic device, and the path loss of the TX0 path to the first antenna 71, the second antenna 72 and the third antenna 73 is small; the fourth antenna 74 is in the lower half of the electronic device and the path loss of the TX1 path to the fourth antenna 74 is small.
It should be noted that, in the NSA mode, SRS 1T4R and four-antenna switching need to be supported, the first switch 13 may be controlled to turn on the first local oscillation source 11 and the first radio frequency transceiver module 2, and the second switch 17 may be controlled to turn on the first local oscillation source 11 and the second radio frequency transceiver module 3, so that a baseband signal of the first baseband signal generator 14 is mixed with a local oscillation signal of the first local oscillation source 11, and a baseband signal of the second baseband signal generator 18 is mixed with a local oscillation signal of the first local oscillation source 11. In the NSA mode, if the TX path needs to be switched to the first antenna 71, the second antenna 72, and the third antenna 73, the third switch 8 is controlled to be closed, the fourth switch 9 is controlled to be opened, and the TX signal passes through the path of the first power amplifier 21 to the first antenna 71, the second antenna 72, and the third antenna 73, so that the path loss can be reduced; in NSA mode, if the TX path needs to be switched to the fourth antenna 74, the fourth switch 9 is controlled to be closed, the third switch 8 is controlled to be opened, and the TX signal passes through the path of the second power amplifier 31 to the fourth antenna 74, so that the path loss can be reduced.
Further, in the SA mode, two TX signals need to be simultaneously supported, the first switch 13 may be controlled to turn on the second local oscillation source 16 and the first radio frequency transceiver module 2, and the second switch 17 may be controlled to turn on the third local oscillation source 20 and the second radio frequency transceiver module 3, so that the baseband signal of the first baseband signal generator 14 and the local oscillation signal of the second local oscillation source 16 are mixed, and the baseband signal of the second baseband signal generator 18 and the local oscillation signal of the third local oscillation source 20 are mixed. The third switch 8 and the fourth switch 9 may be controlled to be closed so that the TX0 signal passes through the path of the first power amplifier 21 to the first antenna 71, the second antenna 72 and the third antenna 73 and the TX1 signal passes through the path of the second power amplifier 31 to the fourth antenna 74.
Through the uplink path reconstruction, in the scenario of 1T4R, the TX signal passes through the path of the first power amplifier 21 to the first antenna 71, the second antenna 72, and the third antenna 73, or the TX signal passes through the path of the second power amplifier 31 to the fourth antenna 74, so that the TX signal passing through the first power amplifier 21 to the first antenna 71, the second antenna 72, the third antenna 73, and the fourth antenna 74 through the four-pole four-throw switch is avoided. The path loss at the rear end of the radio frequency circuit can be reduced, the performance is improved, and the power consumption is reduced; the complexity of the switch can be reduced, the switch at the rear end can be changed from 4P4T to SP3T, and the cost, the occupied area and the path loss can be improved; and the routing difference of 4 paths can be reduced, and the influence of unbalance caused by the routing difference on antenna switching is reduced.
It should be noted that a fixed end of the second single-pole-three-throw switch 64 is connected to the second end of the first radio frequency transceiver module 2, a first active end of the second single-pole-three-throw switch 64 is connected to the first antenna 71, a second active end of the second single-pole-three-throw switch 64 is connected to the second antenna 72 through the first single-pole-two-throw switch, and a third active end of the second single-pole-three-throw switch 64 is connected to the third antenna 73.
In addition, in this embodiment, the fixed terminal of the first single-pole double-throw switch may be connected to the second antenna 72, the first active terminal of the first single-pole double-throw switch may be connected to the first rf receiving module 4, and the second active terminal of the first single-pole double-throw switch may be connected to the first rf transceiving module 2 through the second single-pole double-throw switch 64. The fixed end of the second single-pole double-throw switch may be connected to the fourth antenna 74, the first active end of the second single-pole double-throw switch may be connected to the second rf receiving module 5, and the second active end of the second single-pole double-throw switch may be connected to the second rf transceiving module 3.
In this embodiment, the first rf transceiver module 2 can transmit the rf transmission signal through the first antenna 71, the second antenna 72, and the third antenna 73, and the second rf transceiver module 3 can transmit the rf transmission signal through the fourth antenna 74, so that the 1T4R scenario can be realized through the second single-pole-three-throw switch 64, and the use of a four-pole-four-throw switch is avoided, thereby reducing path loss, improving the rf transmission performance, and reducing the rf power consumption.
Optionally, as shown in fig. 5, the first rf transceiver module 2 further includes a third power amplifier 22 and a third single-pole double-throw switch 23, where the third power amplifier 22 is connected to the rf transceiver 1, a fixed end of the third single-pole double-throw switch 23 is connected to the switch module 6, a first active end of the third single-pole double-throw switch 23 is connected to the first power amplifier 21, and a second active end of the third single-pole double-throw switch 23 is connected to the third power amplifier 22;
the second rf transceiver module 3 further includes a fourth power amplifier 32 and a fourth single-pole double-throw switch 33, the fourth power amplifier 32 is connected to the rf transceiver 1, a fixed end of the fourth single-pole double-throw switch 33 is connected to the switch module 6, a first active end of the fourth single-pole double-throw switch 33 is connected to the second power amplifier 31, and a second active end of the fourth single-pole double-throw switch 33 is connected to the fourth power amplifier 32.
The output end of the third power amplifier 22 is connected to the radio frequency transceiver 1, the first active end of the third single-pole double-throw switch 23 may be connected to the output end of the first power amplifier 21, the second active end of the third single-pole double-throw switch 23 may be connected to the input end of the third power amplifier 22, and the fixed end of the third single-pole double-throw switch 23 may be connected to the switch module 6 through a band-pass filter. An output terminal of the fourth power amplifier 32 may be connected to the radio frequency transceiver 1, a first active terminal of the fourth single-pole double-throw switch 33 may be connected to an output terminal of the second power amplifier 31, a second active terminal of the fourth single-pole double-throw switch 33 may be connected to an input terminal of the fourth power amplifier 32, and a fixed terminal of the fourth single-pole double-throw switch 33 may be connected to the switch module 6 through a band-pass filter.
In this embodiment, the third single-pole double-throw switch 23 can control the first rf transceiver module 2 for rf transmission or rf reception, and the fourth single-pole double-throw switch 33 can control the second rf transceiver module 3 for rf transmission or rf reception, so that the complexity of the rf circuit can be reduced.
The embodiment of the application also provides electronic equipment, and the electronic equipment comprises the radio frequency circuit in the embodiment of the application.
Since other structures of the electronic device are the prior art, and the radio frequency circuit has been described in detail in the foregoing embodiment, details of the structure of the electronic device in this embodiment are not repeated.
The electronic equipment provided by the embodiment of the application is connected with the two radio frequency receiving and transmitting modules through the first local vibration source 11 via the power divider 12, the first local vibration source 11 provides the same local vibration signals for the two radio frequency receiving and transmitting modules, and the situation that a switch used for switching an antenna for transmitting at the rear end needs to be a four-pole four-throw switch can be avoided, so that the flexibility of the design of a radio frequency circuit can be improved.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A radio frequency circuit is characterized by comprising a radio frequency transceiver, a first radio frequency transceiver module, a second radio frequency transceiver module, a first radio frequency receiving module, a second radio frequency receiving module, a switch module and an antenna array;
the radio frequency transceiver comprises a first local vibration source, a power divider, a first switch, a first baseband signal generator, a first frequency mixer, a second local vibration source, a second switch, a second baseband signal generator, a second frequency mixer and a third local vibration source;
the first local vibration source is connected to the first input end of the first switch and the first input end of the second switch through the power splitter, the second local vibration source is connected to the second input end of the first switch, the output end of the first switch is connected to the first end of the first mixer, the first baseband signal generator is connected to the first end of the first rf transceiver module through the second end of the first mixer, the third local vibration source is connected to the second input end of the second switch, the output end of the second switch is connected to the first end of the second mixer, and the second baseband signal generator is connected to the first end of the second rf transceiver module through the second end of the second mixer;
the first end of the first radio frequency receiving module and the first end of the second radio frequency receiving module are both connected with the radio frequency transceiver, and the second end of the first radio frequency receiving module, the second end of the second radio frequency receiving module, the second end of the first radio frequency receiving module and the second end of the second radio frequency receiving module are both connected with the antenna array through the switch module;
under the control of the first switch and the second switch, the radio frequency circuit can be switched between a plurality of states, wherein the plurality of states include a first state and a second state, in the first state, the first local vibration source is conducted with the first radio frequency transceiver module and the second radio frequency transceiver module, in the second state, the second local vibration source is conducted with the first radio frequency transceiver module, and the third local vibration source is conducted with the second radio frequency transceiver module;
the first local oscillation source is configured to generate a local oscillation signal, and the power divider is configured to divide the local oscillation signal generated by the first local oscillation source 11 into multiple paths of signals.
2. The radio frequency circuit of claim 1, wherein the first switch is a single pole double throw switch and the second switch is a single pole double throw switch.
3. The radio frequency circuit of claim 1, wherein the antenna array comprises a first antenna, a second antenna, a third antenna, and a fourth antenna, and wherein the first antenna, the second antenna, the third antenna, and the fourth antenna are all connected to the switch module.
4. The radio frequency circuit according to claim 3, wherein the first radio frequency transceiver module comprises a first power amplifier, an input terminal of the first power amplifier is connected to the first mixer through a third switch;
the second radio frequency transceiver module comprises a second power amplifier, and the input end of the second power amplifier is connected with the second mixer through a fourth switch.
5. The RF circuit of claim 4, wherein the switch module comprises a first double-pole double-throw switch and a second double-pole double-throw switch, the second terminal of the first RF transceiver module and the second terminal of the first RF receiver module are respectively connected to the first antenna and the second antenna through the first double-pole double-throw switch, and the second terminal of the second RF transceiver module and the second terminal of the second RF receiver module are respectively connected to the third antenna and the fourth antenna through the second double-pole double-throw switch.
6. The RF circuit of claim 4, wherein the switch module comprises a first single-pole double-throw switch and a second single-pole double-throw switch, the second terminal of the first RF receiving module is connected to a second antenna through the first single-pole double-throw switch, and the second terminal of the second RF receiving module is connected to a fourth antenna through the second single-pole double-throw switch.
7. The RF circuit of claim 6, wherein the switch module further comprises a first single-pole-three-throw switch, a second terminal of the first RF transceiver module is connected to a first antenna, and a second terminal of the second RF transceiver module is connected to a second antenna, a third antenna and a fourth antenna through the first single-pole-three-throw switch.
8. The RF circuit of claim 6, wherein the switch module further comprises a second SPDT switch, the second terminal of the first RF transceiver module is connected to the first antenna, the second antenna and the third antenna through the second SPDT switch, and the second terminal of the second RF transceiver module is connected to the third antenna.
9. The RF circuit of claim 4, wherein the first RF transceiver module further comprises a third power amplifier and a third SPDT switch, the third power amplifier is connected to the RF transceiver, a fixed terminal of the third SPDT switch is connected to the switch module, a first active terminal of the third SPDT switch is connected to the first power amplifier, and a second active terminal of the third SPDT switch is connected to the third power amplifier;
the second radio frequency transceiving module further comprises a fourth power amplifier and a fourth single-pole double-throw switch, the fourth power amplifier is connected with the radio frequency transceiving module, the fixed end of the fourth single-pole double-throw switch is connected with the switch module, the first active end of the fourth single-pole double-throw switch is connected with the second power amplifier, and the second active end of the fourth single-pole double-throw switch is connected with the fourth power amplifier.
10. An electronic device, characterized in that the electronic device comprises a radio frequency circuit according to any of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011156094.3A CN112272044B (en) | 2020-10-26 | 2020-10-26 | Radio frequency circuit and electronic equipment |
| PCT/CN2021/125814 WO2022089329A1 (en) | 2020-10-26 | 2021-10-22 | Radio-frequency circuit and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011156094.3A CN112272044B (en) | 2020-10-26 | 2020-10-26 | Radio frequency circuit and electronic equipment |
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| CN112272044B true CN112272044B (en) | 2022-07-01 |
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| CN112272044B (en) * | 2020-10-26 | 2022-07-01 | 维沃移动通信有限公司 | Radio frequency circuit and electronic equipment |
| CN112886973B (en) * | 2021-01-28 | 2022-08-26 | 维沃移动通信有限公司 | Radio frequency circuit and electronic equipment |
| CN113258944B (en) * | 2021-05-12 | 2023-05-16 | 展讯通信（上海）有限公司 | SRS transmitting circuit, method and device |
| CN113746495A (en) * | 2021-08-04 | 2021-12-03 | Tcl通讯（宁波）有限公司 | Radio frequency front-end circuit and electronic equipment |
| CN114499704B (en) * | 2022-01-14 | 2023-08-22 | 维沃移动通信有限公司 | Power detection circuit and terminal |
| CN114759946B (en) * | 2022-06-14 | 2022-11-11 | 荣耀终端有限公司 | Radio frequency front end module and method for controlling radio frequency front end module |
| CN115102568B (en) * | 2022-07-12 | 2023-10-24 | 东集技术股份有限公司 | Radio frequency circuit, control method and device, radio frequency read-write equipment and storage medium |
| CN115694522B (en) * | 2023-01-03 | 2023-05-23 | 荣耀终端有限公司 | Radio frequency module and electronic equipment |
| CN116299398B (en) * | 2023-05-23 | 2023-08-29 | 石家庄银河微波技术股份有限公司 | Target ranging method and device applied to aircraft and electronic equipment |
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| CN112272044A (en) | 2021-01-26 |
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