CN108183714B - Radio frequency device and communication equipment - Google Patents
Radio frequency device and communication equipment Download PDFInfo
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- CN108183714B CN108183714B CN201810045189.4A CN201810045189A CN108183714B CN 108183714 B CN108183714 B CN 108183714B CN 201810045189 A CN201810045189 A CN 201810045189A CN 108183714 B CN108183714 B CN 108183714B
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- 238000000926 separation method Methods 0.000 claims abstract description 79
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- 238000004220 aggregation Methods 0.000 claims abstract description 32
- 238000012545 processing Methods 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 abstract description 7
- 230000037431 insertion Effects 0.000 abstract description 7
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- 238000010586 diagram Methods 0.000 description 10
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- 230000005540 biological transmission Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
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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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
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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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/006—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
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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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Abstract
The invention provides a radio frequency device and communication equipment, which solve the problems of insertion loss deterioration and performance reduction of a radio frequency channel caused by the fact that whether a radio frequency signal is a carrier aggregation signal or not needs to pass through all frequency dividers in the radio frequency device when the radio frequency device in the prior art is utilized. The radio frequency device comprises a radio frequency channel switching module, a frequency band separation module and a plurality of radio frequency modules, wherein the radio frequency channel switching module is coupled to an antenna and is used for switching radio frequency signals received by the antenna to the frequency band separation module and transmitting the frequency band signals generated by the frequency band separation module to at least one radio frequency module or directly transmitting the radio frequency signals received by the antenna to at least one radio frequency module; the frequency band separation module is coupled to the radio frequency channel switching module and is used for carrying out frequency band separation on the radio frequency signals transferred by the radio frequency channel switching module, generating frequency band signals and transmitting the frequency band signals to the radio frequency channel switching module; the plurality of radio frequency modules are used for performing radio frequency processing on the radio frequency signals or the frequency band signals.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a radio frequency device and communication equipment.
Background
Currently, in order to increase a communication bandwidth and achieve a higher user data throughput, a Carrier Aggregation (CA) technology is adopted in a Long Term Evolution-Advanced (Long Term Evolution-Advanced, LTE-a) technology. Carrier aggregation is a technique for increasing signal transmission bandwidth and data transmission rate by combining spectrum resources of different frequency bands into a wider frequency band.
The frequency Band of the LTE system is divided into Low Band (LB), Medium Band (MB), and High Band (HB). The multi-carrier aggregation signal received by the antenna generally needs to be divided into frequency bands corresponding to LB, MB, and HB through frequency band separation, and the carrier signal in each frequency band is transmitted to a corresponding radio frequency module for corresponding processing after operations such as filtering, amplification, and the like.
Fig. 1 is a schematic structural diagram of a radio frequency device provided in the prior art. As shown in fig. 1, the radio frequency device includes two frequency dividers, a first frequency divider 21 and a second frequency divider 22, the first frequency divider 21 is coupled to the antenna 10, and the second frequency divider 22 is coupled to the first frequency divider 21. When the radio frequency device is used as a radio frequency receiver, the first frequency divider 21 is used for receiving a radio frequency signal from the antenna 10 and distinguishing HB from MB and LB in the radio frequency signal; the second frequency divider 22 is used to divide the signal divided by the first frequency divider 21 into MB and LB. When the 3CA LB + MB + HB operation is performed, the rf signal received by the antenna 10 is first divided into two signals by the first frequency divider 21, wherein one signal is an HB signal, and the HB signal is cut to a corresponding frequency band by the first Multiplexer (MUX) 31 coupled to the first frequency divider 21, and then filtered by the at least one first filter 41 with a specific frequency, and then transmitted to the at least one first rf module 51 for signal processing; the other path of signals is divided into MB signals and LB signals by the second frequency divider 22, wherein the MB signals are cut to the corresponding frequency band by the second multiplexer 32 coupled to the second frequency divider 22, and then are filtered by the at least one second filter 42 with a specific frequency and then are transmitted to the at least one second rf module 52 for signal processing, and the LB signals are cut to the corresponding frequency band by the third multiplexer 33 coupled to the second frequency divider 22 and then are filtered by the at least one third filter 43 with a specific frequency and then are transmitted to the at least one third rf module 53 for signal processing. For another example, when performing 2CA LB + MB operation, the rf signal received by the antenna 10 also needs to pass through the first frequency divider 21 and then pass through the second frequency divider 22 to perform frequency division operation, and then the MB signal and the LB signal are divided, where the MB signal/the LB signal are respectively switched to corresponding frequency bands through the second multiplexer 32 and the third multiplexer 33, and then are filtered by the at least one second filter 42 and the at least one third filter 43 with specific frequencies, and finally are transmitted to the at least one second rf module 52 and the at least one third rf module 53 for signal processing. When the radio frequency signal is not a carrier aggregation signal and does not need to be CA operated, for example, in the case of using the LB frequency band in the LTE system, the radio frequency signal also passes through the first frequency divider 21 and the second frequency divider 22, then enters the third multiplexer 33, is switched to the corresponding frequency band by the switch of the third multiplexer 33, is filtered by the at least one third filter 43, and finally is transmitted to the at least one third radio frequency module 53 for signal processing.
It can be seen that, with the rf device shown in fig. 1, no matter whether the CA operation is performed or not, the rf signal must pass through the first frequency divider 21 and the second frequency divider 22, which results in increased loss, and the performance of the rf device, both for transmitting and receiving, is reduced.
Disclosure of Invention
In view of this, embodiments of the present invention provide a radio frequency device and a communication apparatus, so as to solve the problems of degraded insertion loss and performance degradation of a radio frequency channel caused by that whether a radio frequency signal is a carrier aggregation signal or not needs to pass through all frequency dividers in the radio frequency device when the radio frequency device in the prior art is used.
The invention provides a radio frequency device, which comprises a radio frequency channel switching module, a frequency band separation module and a plurality of radio frequency modules, wherein the radio frequency channel switching module is coupled to an antenna and is used for switching a radio frequency signal received by the antenna to the frequency band separation module and transmitting the frequency band signal generated by the frequency band separation module to at least one of the plurality of radio frequency modules or directly transmitting the radio frequency signal received by the antenna to at least one of the plurality of radio frequency modules; the frequency band separation module is coupled to the radio frequency channel switching module and is used for carrying out frequency band separation on the radio frequency signals transferred by the radio frequency channel switching module, generating frequency band signals and transmitting the frequency band signals to the radio frequency channel switching module; the plurality of radio frequency modules are used for performing radio frequency processing on the radio frequency signals or the frequency band signals output by the radio frequency channel switching module.
In one embodiment, the radio frequency device further includes a detection module, disposed between the antenna and the radio frequency path switching module, for detecting whether the radio frequency signal received by the antenna is a carrier aggregation signal, and when it is detected that the radio frequency signal is the carrier aggregation signal, controlling the radio frequency path switching module to switch the radio frequency signal to the frequency band separation module for frequency band separation; and when the radio frequency signal is detected not to be the carrier aggregation signal, controlling the radio frequency channel switching module to directly transmit the radio frequency signal to at least one radio frequency module in the plurality of radio frequency modules.
In one embodiment, the rf path switching module includes a first input port coupled to the detection module, a first output port coupled to the frequency band separation module, and a plurality of second output ports coupled to the plurality of rf modules, the detection module controls the rf path switching module to switch the rf signal to the frequency band separation module by controlling the first input port and the first output port to be connected to the frequency band separation module, and controls the rf path switching module to directly transmit the rf signal to at least one of the plurality of rf modules by controlling at least one of the second output ports of the first input port and the plurality of second output ports to be connected to at least one of the plurality of rf modules.
In one embodiment, the rf path switching module further includes a plurality of second input ports, and the frequency band separating module includes: a common terminal coupled to a first output port of the radio frequency path switching module; and the plurality of branch ports are coupled to the plurality of second input ports of the radio frequency path switching module and are selectively coupled to the plurality of radio frequency modules through the connection of the plurality of second input ports and the plurality of second output ports of the radio frequency path switching module.
In one embodiment, the frequency band separating module is multiple, and the radio frequency path switching module enables, through switching control, a common port of each of the multiple frequency band separating modules to be coupled to both a first output port of the radio frequency path switching module and sub-ports of other frequency band separating modules, so that each sub-port of each of the frequency band separating modules can be selectively coupled to at least one of the multiple radio frequency modules through connection of at least one second input port of the multiple second input ports and at least one second output port of the multiple second output ports, and can also be coupled to common ports of other frequency band separating modules.
In one embodiment, the plurality of frequency band separating modules include a first frequency band separating module having a first frequency range and a second frequency band separating module having a second frequency range, where the second frequency range is included in the first frequency range, the first frequency band separating module and the second frequency band separating module respectively include a common port and two sub-ports, when performing 2CA operation, the radio frequency path switching module controls the common port of one of the first frequency band separating module and the second frequency band separating module to be coupled to the first output port of the radio frequency path switching module, and each of the two sub-ports is selectively coupled to at least one of the plurality of radio frequency modules through connection of at least one second input port of the plurality of second input ports and at least one second output port of the plurality of second output ports; when the 3CA operation is performed, the radio frequency path switching module controls the common port of the first frequency band separating module to be coupled to the first output port of the radio frequency path switching module, one of the two sub-ports is coupled to the common port of the second frequency band separating module, and the other sub-port of the first frequency band separating module and the two sub-ports of the second frequency band separating module are selectively coupled to at least one of the plurality of radio frequency modules through connection of at least one second input port of the plurality of second input ports and at least one second output port of the plurality of second output ports, respectively.
In one embodiment, the frequency band signal includes a frequency band sub-signal or a plurality of frequency band sub-signals with different frequency ranges, the radio frequency device further includes a plurality of signal processing modules, the plurality of signal processing modules are coupled between the radio frequency path switching module and the plurality of radio frequency modules and correspond to the plurality of radio frequency modules one to one, and each signal processing module of the plurality of signal processing modules is configured to process the radio frequency signal or the frequency band sub-signal output by the radio frequency path switching module and then transmit the radio frequency signal or the frequency band sub-signal to the corresponding radio frequency module.
In one embodiment, any one of the plurality of signal processing modules comprises: the filter is used for filtering the radio frequency signal or the frequency band sub-signal output by the radio frequency channel switching module to obtain a filtering signal; and the amplifier is coupled to the filter and used for carrying out gain amplification on the filtered signal output by the filter.
In one embodiment, the radio frequency path switching module is a multiplexer; the frequency band separation module is one or a combination of a duplexer, a triplexer, a quadruplexer, a low-pass filter, a high-pass filter and a band-pass filter.
Another aspect of the present invention provides a communication device, including the radio frequency device and the antenna as described in any of the above embodiments.
In the radio frequency device provided by the embodiment of the invention, the radio frequency channel switching module with the channel switching function is arranged between the frequency band separation module and the radio frequency module, so that when a radio frequency signal is a carrier aggregation signal, the radio frequency signal can be switched to the frequency band separation module by the radio frequency channel switching module to carry out frequency band separation operation, and at least one frequency band sub-signal obtained after separation is selectively coupled to the corresponding radio frequency module, thereby avoiding mutual interference among signals in different frequency ranges; meanwhile, when the radio frequency signal is a non-carrier aggregation signal, the radio frequency signal can be controlled by the radio frequency channel switching module to be directly switched to the radio frequency module matched with the radio frequency signal without passing through a frequency band separation module, so that the insertion loss is reduced, the insertion loss deterioration of the radio frequency channel is improved, and the performance of the radio frequency device is improved.
Drawings
Fig. 1 is a schematic structural diagram of a radio frequency device provided in the prior art.
Fig. 2 is a schematic structural diagram of a radio frequency device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a radio frequency device according to another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a radio frequency device according to another embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a radio frequency device according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 is a schematic structural diagram of a radio frequency device according to an embodiment of the present invention. The radio frequency device can support a carrier aggregation technology in the technical field of LTE-A, and can be applied to communication equipment such as a smart phone, a tablet computer or a notebook computer. The radio frequency device is coupled to an antenna 40, and the antenna 40 is used for receiving radio frequency signals, for example, radio frequency signals transmitted by base stations in a wireless network. As shown in fig. 2, the radio frequency device in this embodiment specifically includes a radio frequency path switching module 10a, a frequency band separating module 20a, and a plurality of radio frequency modules 30, wherein the radio frequency path switching module 10a is coupled to an antenna 40, and is capable of switching a radio frequency signal received by the antenna 40 to the frequency band separating module 20a and transmitting a frequency band signal generated by frequency division of the frequency band separating module 20a to at least one radio frequency module 30 of the plurality of radio frequency modules 30, or directly transmitting a radio frequency signal received by the antenna 40 to at least one radio frequency module 30 of the plurality of radio frequency modules 30. The frequency band separating module 20a is coupled to the rf path switching module 10a, and is configured to separate the frequency band of the rf signal transferred by the rf path switching module 10a, generate a frequency band signal, and transmit the frequency band signal to the rf path switching module 10 a. The rf module 30 is configured to perform rf processing such as modulation and extraction on the rf signal or the frequency band signal output by the rf path switching module 10 a. That is to say, when the radio frequency signal received by the antenna 40 is a carrier aggregation signal of multiple carriers, the radio frequency path switching module 10a may connect the path to the frequency band splitting module 20a, so that the radio frequency signal received by the antenna 40 is transmitted to the frequency band splitting module 20a for frequency band splitting, thereby obtaining a frequency band signal, where the frequency band signal may be a frequency band sub-signal, or may include multiple frequency band sub-signals with different frequency ranges, and each frequency band sub-signal may further include at least one carrier of the multiple carriers. The at least one frequency band sub-signal is selectively transmitted to at least one rf module 30 of the plurality of rf modules 30 for rf processing through the rf path switching module 10 a. When the rf signal received by the antenna 40 is not a carrier aggregation signal, the rf signal may not pass through the frequency band separation module 20a, but be controlled by the rf path switching module 10a to be directly transmitted to at least one of the plurality of rf modules 30.
It should be noted that, although only two rf modules 30 are shown in the embodiment of fig. 2, those skilled in the art can understand that the number of the rf modules 30 may be set differently according to specific needs and different situations, for example, the number may be three, four or more, and the present invention is not limited thereto.
In an embodiment of the present invention, the rf path switching module 10a may be implemented by a multiplexer.
In the radio frequency device provided by the embodiment of the invention, the radio frequency channel switching module 10a with the channel switching function is arranged between the frequency band separation module 20a and the radio frequency module 30, so that when a radio frequency signal is a carrier aggregation signal, the radio frequency signal can be switched to the frequency band separation module 20a by the radio frequency channel switching module 10a to carry out frequency band separation operation, and at least one frequency band sub-signal obtained after separation is selectively coupled to the corresponding radio frequency module 30, thereby avoiding mutual interference among signals in different frequency ranges; meanwhile, when the rf signal is a non-carrier aggregation signal, the rf signal can be controlled by the rf path switching module 10a to be directly switched to the rf module 30 matched with the rf signal without passing through the frequency band separating module 20a, so that the insertion loss is reduced, the insertion loss deterioration of the rf path is improved, and the performance of the rf device is improved.
Fig. 3 is a schematic structural diagram of a radio frequency device according to another embodiment of the present invention. As shown in fig. 3, the rf apparatus includes a detection module 50 in addition to an rf path switching module 10b, a frequency band separating module 20b and a plurality of rf modules 30. The detecting module 50 is disposed between the antenna 40 and the rf path switching module 10b, and is configured to detect whether the rf signal received by the antenna 40 is a carrier aggregation signal. The rf path switching module 10b includes a first input port 11 coupled to the detection module 50, a first output port 12 coupled to the band separating module 20b, a plurality of second output ports 13 coupled to the plurality of rf modules 30, and a plurality of second input ports 14 capable of matching with the plurality of second output ports 13.
When the detection module 50 detects that the radio frequency signal received by the antenna 40 is a carrier aggregation signal, the radio frequency path switching module 10b is controlled to switch the radio frequency signal to the frequency band separation module 20b for frequency band separation, and specifically, the radio frequency signal is switched to the frequency band separation module 20b by controlling the connection between the first input port 11 and the first output port 12 and the frequency band separation module 20 b; when the detection module 50 detects that the rf signal is not a carrier aggregation signal, the rf path switching module 10b is controlled to directly transmit the rf signal to at least one rf module 30 of the plurality of rf modules 30, and specifically, the first input port 11 and the at least one second output port 13 are controlled to be connected to the at least one rf module 30 to directly transmit the rf signal to the at least one rf module 30 matched therewith.
The frequency band splitting module 20b specifically includes a common port 23 and a plurality of sub-ports 24. The common terminal 23 is coupled to the first output port 12 of the rf path switching module 10 b. The plurality of sub-ports 24 are coupled to the plurality of second input ports 14 of the rf path switching module 10b, and may be selectively coupled to the plurality of rf modules 30 through connection of the plurality of second input ports 14 and the plurality of second output ports 13 of the rf path switching module 10 b.
Thus, a plurality of signal paths are formed among the frequency band separating module 20b, the radio frequency path switching module 10b and the plurality of radio frequency modules 30, and specifically, each signal path is composed of a common port 23 of the frequency band separating module 20b, a branch port 24, a second input port 14, at least one second output port 13 and at least one radio frequency module 30 of the radio frequency path switching module 10 b. When the carrier aggregation signal is divided into a plurality of frequency band sub-signals with different frequency ranges by the frequency band separation module 20b, each of the frequency band sub-signals is finally transmitted to at least one rf module 30 through the path for corresponding processing.
In addition, when the radio frequency signal received by the antenna 40 is an intra-band discontinuous CA signal or an intra-band continuous CA signal, the frequency band separation module 20b may further divide a plurality of carriers of the intra-band discontinuous CA or the intra-band continuous CA into a frequency band, that is, a frequency band sub-signal is formed after passing through the frequency band separation module 20b, and then the frequency band sub-signal is finally transmitted to at least one radio frequency module 30 through transmission of a path matched with the frequency band sub-signal.
In this embodiment, the three sub-ports 24 in the frequency band separating module 20b are only used as an example, and those skilled in the art can understand that in other embodiments, the frequency band separating module 20b may also include, for example, two, four or other numbers of sub-ports 24, and the specific number of the sub-ports 24 is related to the type of the selected frequency band separating module 20 b.
For the band separating module 20b, it may be a combination of one or more of a duplexer, a triplexer, a quadplexer, a low pass filter, a high pass filter, and a band pass filter, for example. For example, when the duplexer is selected as the frequency band separating module 20b, the number of the branch ports 24 is two, and at this time, 2CA operation may be performed, for example, the carrier aggregation signal may be divided into signals of two frequency bands, i.e., high and low frequencies; when the triplexer is selected as the frequency band separation module 20b, the number of the branch ports 24 is three, and at this time, the carrier aggregation signal can be divided into signals of three frequency bands, i.e., high, medium, and low frequencies, i.e., 3CA operation is performed; when the quadruplex is selected as the frequency band separation module 20b, the number of the branch ports 24 is four, and at this time, 4CA operation can be performed, that is, the carrier aggregation signal can be divided into 4 frequency band signals with different frequency ranges. Meanwhile, the number of the rf modules 30 coupled to the second output port 13 of the rf path switching module 10b may correspond to the number of the branch ports 24 of the frequency band splitting module 20b, which is two, three, and four, respectively, and certainly may be more than the number of the branch ports 24 of the frequency band splitting module 20b, which is not limited in the present invention.
The radio frequency device provided in the embodiment of the present invention detects whether the radio frequency signal received by the antenna 40 is a carrier aggregation signal by adding the detection module 50, and controls whether the radio frequency path switching module 10b switches the radio frequency signal to the frequency band separation module 20b for frequency division operation according to the detection result, and specifically, the switching operation of the line can be realized by controlling the connection between the first input port 11 and the first output port 12 or the second output port 13 of the radio frequency path switching module 10b, which is simple in structure and easy to implement.
Fig. 4 is a schematic structural diagram of a radio frequency device according to another embodiment of the present invention. As shown in fig. 4, the rf apparatus further includes a plurality of signal processing modules 60 based on the embodiment shown in fig. 3, wherein the signal processing modules 60 are coupled between the rf path switching module 10b and the plurality of rf modules 30, and correspond to the rf modules 30 one to one. Each signal processing module 60 is configured to process the rf signal or the frequency band sub-signal output by the rf path switching module 10b, and then transmit the processed rf signal or frequency band sub-signal to the corresponding rf module 30.
In one embodiment, any one of the plurality of signal processing modules 60 may include a filter 61 and an amplifier 62. The input of the filter 61 is coupled to a second output 13 of the rf path switching module 10b, and the output of the filter 61 is coupled to the input of the amplifier 62. The filter 61 is configured to filter the radio frequency signal or the frequency band sub-signal output by the radio frequency path switching module 10b to obtain a filtered signal. The filter 61 can be selected according to specific needs, such as a band pass filter, a low pass filter, or a high pass filter. The amplifier 62 is configured to receive the filtered signal output by the filter 61, perform gain amplification on the filtered signal to obtain a processed signal, and transmit the processed signal to the corresponding rf module 30. For the amplifier 62, a low noise amplifier may be selected, for example, to improve the signal-to-noise ratio of the output.
The radio frequency device provided by the embodiment of the invention further reduces mutual interference in the signal transmission process by adding the design of the filter 61 and the amplifier 62, improves the signal-to-noise ratio and optimizes the overall performance of the radio frequency device.
In an embodiment of the present invention, the radio frequency device may include a plurality of frequency band separation modules having different frequency ranges or different components. The radio frequency channel switching module can make the common end of each frequency band separation module in the frequency band separation modules be coupled to the first output port of the radio frequency channel switching module or to the branch ports of other frequency band separation modules through switching control, and make each branch port of each frequency band separation module be selectively coupled to at least one radio frequency module in the plurality of radio frequency modules through the connection of at least one second input port in the plurality of second input ports and at least one second output port in the plurality of second output ports or to the common end of other frequency band separation modules.
Then, when the radio frequency signal received by the antenna is a carrier aggregation signal, the radio frequency path switching module may select and switch the carrier aggregation signal to the frequency band separation module corresponding to the carrier aggregation signal to perform frequency band separation operation according to the frequency range of frequency division required by the CA, so as to obtain a plurality of first frequency band sub-signals, and further, may switch one or more first frequency band sub-signals among the plurality of first frequency band sub-signals to the common terminal of another frequency band separation module to continue the frequency band separation operation, so as to obtain a plurality of second frequency band sub-signals with different frequency ranges or a plurality of carrier signals with different frequency components.
In the following, a case that the radio frequency device includes a plurality of frequency band separation modules will be specifically described by taking an example that the frequency band separation modules are two and each frequency band separation module includes two sub-ports, but it is to be understood that the present invention is not limited to such a structure, the frequency band separation modules in the radio frequency device may also be three, four or more, and the sub-ports in each frequency band separation module are also not limited to two, but may also be three, four or more.
Fig. 5 is a schematic structural diagram of a radio frequency device according to an embodiment of the present invention. As shown in fig. 5, the rf module includes two frequency band separating modules, namely a first frequency band separating module 210 having a first frequency range and a second frequency band separating module 220 having a second frequency range, wherein the second frequency range is included in the first frequency range, that is, the frequency range of the first frequency band separating module 210 is larger, and the frequency range of the second frequency band separating module 220 is smaller, which can continue to perform finer frequency division based on the frequency division result of the first frequency band separating module 210. The first band splitting module 210 and the second band splitting module 220 each comprise a common port 23 and two sub-ports 24.
The radio frequency device can be controlled by the switching of the radio frequency path switching module 10c, so that the common port 23 of the first frequency band separating module 210 can be coupled to the first output port 12 of the radio frequency path switching module 10c, and the branch port 24 of the first frequency band separating module 210 can be selectively coupled to at least one radio frequency module 30 of the plurality of radio frequency modules 30 by the connection of the second input port 14 and the second output port 13 of the radio frequency path switching module 10c, so as to complete the transmission of the frequency band sub-signal of the 2CA operation, and can also be coupled to the common port 23 of the second frequency band separating module 220 to perform the 3CA operation. For the second frequency band separating module 220, the sub-port 24 thereof can be selectively coupled to at least one rf module 30 of the plurality of rf modules 30 by connecting the second input port 14 and the second output port 13 of the rf path switching module 10c, and the common port 23 thereof can be coupled to both the first output port 12 of the rf path switching module 10c to perform 2CA operation and the sub-port 24 of the first frequency band separating module 210 to perform 3CA operation.
For example, the first band separation module 210 of the radio frequency device of the present embodiment can separate the HB signal from a larger frequency range, such as a range including three types of signals, i.e., HB, MB and LB, and the second band separation module 220 can distinguish MB and LB. When performing 2CA LB + MB operation, the rf path switching module control 10c may directly control the common port 23 of the second frequency band separating module 220 to be coupled to the first output port 12 of the rf path switching module 10c, so that each sub-port 24 of the second frequency band separating module 220 is selectively coupled to at least one rf module 30 through the connection of at least one second input port 14 and at least one second output port 13, and frequency division operation may be completed without passing through the first frequency band separating module 210.
When the 3CA LB + MB + HB operation is performed, the rf path switching module control 10c may control the common port 23 of the first frequency band separating module 210 to be coupled to the first output port 12 of the rf path switching module 10c, such that one sub-port 24 of the two sub-ports 24 is coupled to the common port 23 of the second frequency band separating module 220, and simultaneously, the other sub-port 24 of the first frequency band separating module 210 and the two sub-ports 24 of the second frequency band separating module 220 are selectively coupled to at least one rf module 30 through the connection of the at least one second input port 14 and the at least one second output port 13, respectively. The carrier aggregation signal is separated by the frequency band of the first frequency band separation module 210 to generate two first frequency band sub-signals, which are an HB signal and an LB + MB signal, respectively, wherein the HB signal does not need to undergo frequency division operation, and can be directly transmitted to at least one corresponding radio frequency module 30 through the switching control of the radio frequency access switching module 10 c; the LB + MB signal is switched to the second frequency band separation module 220 through the switching control of the rf path switching module 10c to continue the frequency band separation operation, and is divided into two second frequency band sub-signals, which are the LB signal and the MB signal, after the second frequency division, and the two second frequency band sub-signals are controlled by the rf path switching module 10c to be directly transmitted to the corresponding at least one rf module 30.
In practical applications, sometimes it is necessary to perform operations over 3CA on a radio frequency signal, such as 4CA and 5CA operations or continue carrier separation operations on a frequency band sub-signal generated after the frequency band separation operation, and a person skilled in the art may add a frequency band separation module of a required frequency range or component in a radio frequency module according to actual needs, which is not limited in the present invention.
The radio frequency device provided by the embodiment comprises a plurality of frequency band separation modules, so that in the frequency band separation process, carrier aggregation signals can be selectively switched to the corresponding frequency dividers for frequency division operation under the control of the radio frequency path switching module according to the frequency range of required frequency division, and thus, when 2CA operation is carried out, a radio frequency path only needs to pass through one frequency band separation module; the radio frequency device can also couple the public end and the branch port of the different frequency band separation modules together through the control of the radio frequency channel switching module so as to complete the frequency band separation operation or the carrier separation operation of 3CA and even above 3 CA. In summary, the radio frequency device provided in the embodiment of the present invention enables the radio frequency channel to be switched to different frequency band separation modules for frequency division operation according to different requirements by setting the switching functions of the plurality of frequency band separation modules and the radio frequency channel switching module, so that the insertion loss is optimized, and the flexibility and reliability of the radio frequency channel are improved.
The embodiment of the present invention further provides a communication device, including the radio frequency device and the antenna described in any of the above embodiments, where the communication device may be a smart phone, a tablet computer, or a notebook computer.
It should be understood that although several modules of the apparatus are mentioned in the above detailed description, such division is merely exemplary and not mandatory. In fact, according to the exemplary embodiment of the present invention, the above-described division of each module is only one logical function division, and there may be another division in actual implementation, for example, the features and functions of two or more modules may be implemented in one module, whereas the features and functions of one module described above may be further divided into multiple modules to be implemented. Furthermore, some of the modules described above may be omitted in some application scenarios.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalents and the like within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A radio frequency device comprises a detection module, a radio frequency channel switching module, a frequency band separation module and a plurality of radio frequency modules,
the detection module is arranged between an antenna and the radio frequency channel switching module and is used for detecting whether the radio frequency signal received by the antenna is a carrier aggregation signal or not, wherein when the detection module detects that the radio frequency signal is the carrier aggregation signal, the detection module controls the radio frequency channel switching module to transfer the radio frequency signal to the frequency band separation module for frequency band separation; when the detection module detects that the radio frequency signal is not a carrier aggregation signal, controlling the radio frequency channel switching module to directly transmit the radio frequency signal to at least one of the plurality of radio frequency modules;
the radio frequency channel switching module is coupled to the antenna and is used for switching a radio frequency signal received by the antenna to the frequency band separation module and transmitting the frequency band signal generated by the frequency band separation module to at least one of the plurality of radio frequency modules, or directly transmitting the radio frequency signal received by the antenna to at least one of the plurality of radio frequency modules;
the frequency band separation module is coupled to the radio frequency channel switching module and is used for carrying out frequency band separation on the radio frequency signals transferred by the radio frequency channel switching module, generating the frequency band signals and transmitting the frequency band signals to the radio frequency channel switching module;
the radio frequency modules are used for performing radio frequency processing on the radio frequency signals or the frequency band signals output by the radio frequency channel switching module;
the radio frequency path switching module comprises a first input port, a first output port, a plurality of second input ports and a plurality of second output ports; the frequency band separation module includes: a common port coupled to a first output port of the radio frequency path switching module; a plurality of sub-ports coupled to the plurality of second input ports of the radio frequency path switching module, selectively coupled to the plurality of radio frequency modules through connection of the plurality of second input ports and the plurality of second output ports of the radio frequency path switching module;
the frequency band separating module is multiple, the radio frequency path switching module enables a common end of each frequency band separating module in the frequency band separating modules to be coupled to the first output port of the radio frequency path switching module and also to be coupled to sub-ports of other frequency band separating modules through switching control, and each sub-port of each frequency band separating module can be selectively coupled to at least one radio frequency module in the radio frequency modules through connection of at least one second input port in the second input ports and at least one second output port in the second output ports, and also can be coupled to common ends of other frequency band separating modules;
the plurality of frequency band separating modules comprise a first frequency band separating module with a first frequency range and a second frequency band separating module with a second frequency range, wherein the second frequency range is included in the first frequency range, the first frequency band separating module and the second frequency band separating module respectively comprise a public end and two branch ports,
wherein, when performing 2CA operation, the radio frequency path switching module controls a common port of one of the first and second frequency band separating modules to be coupled to the first output port of the radio frequency path switching module, each of the two sub-ports being selectively coupled to at least one of the plurality of radio frequency modules through a connection of at least one of the plurality of second input ports and at least one of the plurality of second output ports;
when performing a 3CA operation, the rf path switching module controls a common port of the first band separating module to be coupled to the first output port of the rf path switching module, one of the two sub-ports is coupled to a common port of the second band separating module, and the other sub-port of the first band separating module and the two sub-ports of the second band separating module are selectively coupled to at least one of the plurality of rf modules through connection of at least one second input port of the plurality of second input ports and at least one second output port of the plurality of second output ports, respectively.
2. The radio frequency apparatus according to claim 1, wherein the radio frequency path switching module includes a first input port coupled to the detection module, a first output port coupled to the band splitting module, and a plurality of second output ports coupled to the plurality of radio frequency modules, the detection module controls the radio frequency channel switching module to switch the radio frequency signal to the frequency band separation module by controlling the first input port and the first output port to be connected with the frequency band separation module, controlling the radio frequency path switching module to directly transmit the radio frequency signal to at least one of the plurality of radio frequency modules by controlling at least one of the first input port and the plurality of second output ports to be connected with at least one of the plurality of radio frequency modules.
3. The radio frequency device according to claim 1, wherein the band signal includes a band sub-signal or a plurality of band sub-signals with different frequency ranges, the radio frequency device further includes a plurality of signal processing modules, the plurality of signal processing modules are coupled between the radio frequency path switching module and the plurality of radio frequency modules and correspond to the plurality of radio frequency modules one to one, and each of the plurality of signal processing modules is configured to process the radio frequency signal or the band sub-signal output by the radio frequency path switching module and then transmit the radio frequency signal or the band sub-signal to a corresponding radio frequency module.
4. The radio frequency device according to claim 3, wherein any one of the plurality of signal processing modules comprises:
the filter is used for filtering the radio frequency signal or the frequency band sub-signal output by the radio frequency channel switching module to obtain a filtered signal;
an amplifier coupled to the filter for gain amplifying the filtered signal output by the filter.
5. The radio frequency device according to claim 1, wherein the radio frequency path switching module is a multiplexer; the frequency band separation module is one or a combination of a duplexer, a triplexer, a quadruplexer, a low-pass filter, a high-pass filter and a band-pass filter.
6. A communication device comprising a radio frequency apparatus as claimed in any one of claims 1 to 5 and an antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045189.4A CN108183714B (en) | 2018-01-17 | 2018-01-17 | Radio frequency device and communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810045189.4A CN108183714B (en) | 2018-01-17 | 2018-01-17 | Radio frequency device and communication equipment |
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| CN108183714A CN108183714A (en) | 2018-06-19 |
| CN108183714B true CN108183714B (en) | 2021-12-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8892057B2 (en) * | 2011-08-23 | 2014-11-18 | Rf Micro Devices, Inc. | Carrier aggregation radio system |
| CN204761429U (en) * | 2015-06-24 | 2015-11-11 | 陈林 | Terminal device |
| US10182403B2 (en) * | 2015-09-30 | 2019-01-15 | Skyworks Solutions, Inc. | Diplexed coupler for carrier aggregation |
| CN106712795B (en) * | 2015-11-13 | 2020-06-16 | 华为终端有限公司 | Radio frequency circuit of LTE carrier aggregation technology and communication equipment thereof |
| CN107181497B (en) * | 2017-06-30 | 2020-01-14 | Oppo广东移动通信有限公司 | Radio frequency circuit, antenna device and electronic equipment |
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