CN117997372A - Radio frequency front-end circuit, antenna switching method and mobile terminal - Google Patents
Radio frequency front-end circuit, antenna switching method and mobile terminal Download PDFInfo
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- CN117997372A CN117997372A CN202410093071.4A CN202410093071A CN117997372A CN 117997372 A CN117997372 A CN 117997372A CN 202410093071 A CN202410093071 A CN 202410093071A CN 117997372 A CN117997372 A CN 117997372A
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Abstract
The application discloses a radio frequency front-end circuit, an antenna switching method and a mobile terminal, wherein the radio frequency front-end circuit comprises a first power amplifier, a second power amplifier and a switch switching module, and the first power amplifier is used for outputting a 4G radio frequency signal; the second power amplifier is used for outputting a 5G radio frequency signal; the switch switching module is respectively connected with the first power amplifier, the second power amplifier, the first antenna and the second antenna, and the efficiency of the second antenna is higher than that of the first antenna; when the radio frequency front-end circuit is in a single-frequency working mode, the switch switching module is configured to communicate the first power amplifier or the second power amplifier with the second antenna; the application can effectively improve the antenna performance of the mobile terminal in the single-frequency working mode.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a radio frequency front end circuit, an antenna switching method, and a mobile terminal.
Background
The conventional mobile terminal 5G project design needs to support NSA (Non Standalone, non-independent networking) mode, that is, the 4G frequency band and the 5G frequency band work simultaneously, at this time, a 4G radio frequency power amplifier and a 5G radio frequency power amplifier need to be used, and the two radio frequency power amplifiers work simultaneously to respectively transmit the 4G signal and the 5G signal. This results in the need for 2 antennas to support the 4G band and the 5G band, respectively.
But at the same time, the mobile terminal also supports single-frequency operation, such as single 4G frequency band operation or single 5G frequency band operation, the transmitting signal of the conventional 4G radio frequency power amplifier is designed to fix one antenna, the transmitting signal of the 5G radio frequency power amplifier is designed to fix the other antenna, in the product of the mobile terminal which tends to be light and thin like this, the space is limited, only one of the two antennas is a high-efficiency antenna in many cases, and the other antenna has low efficiency. This results in either a somewhat inefficient antenna for the 4G band or a somewhat inefficient antenna for the 5G band during single frequency operation, resulting in reduced antenna performance in the mobile terminal.
Disclosure of Invention
The application provides a radio frequency front-end circuit, an antenna switching method and a mobile terminal, which can improve the antenna performance of the mobile terminal in single-frequency operation.
The application provides a radio frequency front-end circuit, which comprises a first power amplifier, a second power amplifier and a switch switching module, wherein the first power amplifier is connected with the second power amplifier; the first power amplifier is used for outputting a 4G radio frequency signal; the second power amplifier is used for outputting a 5G radio frequency signal; the switch switching module is respectively connected with the first power amplifier and the second power amplifier, and is also respectively connected with the first antenna and the second antenna; wherein the efficiency of the second antenna is higher than the efficiency of the first antenna; when the radio frequency front-end circuit is in a single-frequency working mode, the switch switching module is configured to communicate the first power amplifier or the second power amplifier with the second antenna; the radio frequency front-end circuit transmits a 4G radio frequency signal or a 5G radio frequency signal in a single-frequency working mode; when the radio frequency front-end circuit is in the dual-frequency working mode, the switch switching module is configured to communicate the first power amplifier with the first antenna and communicate the second power amplifier with the second antenna; the radio frequency front-end circuit transmits a 4G radio frequency signal and a 5G radio frequency signal in a double-frequency working mode.
In some embodiments, the radio frequency front end circuit has a first power amplifier with a plurality of first transmit ports and a second power amplifier with a plurality of second transmit ports; the frequency bands of the 4G radio frequency signals output by each first transmitting port are different, and the frequency bands of the 5G radio frequency signals output by each second transmitting port are different.
In some embodiments, the radio frequency front-end circuit, the switch switching module includes one or more switch switching units; each switch switching unit is correspondingly connected with a first transmitting port and a second transmitting port, and the frequency bands of radio frequency signals output by the first transmitting port and the second transmitting port which are connected with the same switch switching unit are the same.
In some embodiments, when the switch switching units are multiple, the radio frequency front-end circuit further includes a first integrated switch and a second integrated switch, the first integrated switch is connected with the first antenna and each switch switching unit, and the first integrated switch is used for outputting the radio frequency signals output by each switch switching unit to the first antenna after being combined; the second integrated switch is connected with the second antenna and each switch switching unit, and the second integrated switch is used for outputting the radio frequency signals output by each switch switching unit to the second antenna after being combined.
In some embodiments, the radio frequency front-end circuit further comprises a receiving module, a first diplexer, and a second diplexer; the number of the first diplexers is the same as that of the switch switching units, the receiving ends of the first diplexers are connected with the receiving modules, the transmitting ends of the first diplexers are correspondingly connected with one switch switching unit, and the public ends of the first diplexers are connected with the first integrated switch; the number of the second diplexers is the same as that of the switch switching units, the receiving ends of the second diplexers are connected with the receiving modules, the transmitting ends of the second diplexers are correspondingly connected with one switch switching unit, and the public ends of the second diplexers are connected with the second integrated switch.
In some embodiments, the radio frequency front end circuit, the switch switching unit comprises a double pole double throw switch, a first input end of the double pole double throw switch is connected with the first transmitting port, a second input end of the double pole double throw switch is connected with the second transmitting port, a first output end of the double pole double throw switch is connected with the transmitting end of the first duplexer, and a second output end of the double pole double throw switch is connected with the transmitting end of the second duplexer.
In some embodiments, the radio frequency front end circuit comprises a switch switching unit including a first single-pole double-throw switch and a second single-pole double-throw switch, wherein a common end of the first single-pole double-throw switch is connected with the first transmitting port, a first connecting end of the first single-pole double-throw switch is connected with a transmitting end of the first duplexer, a second connecting end of the first single-pole double-throw switch is connected with a first connecting end of the second single-pole double-throw switch, a second connecting end of the second single-pole double-throw switch is connected with the second transmitting port, and a common end of the second single-pole double-throw switch is connected with a transmitting end of the second duplexer.
In some embodiments, the radio frequency front end circuit, the first antenna and the second antenna are both transmit-receive antennas.
The embodiment of the application also provides the mobile terminal, and the mobile terminal is provided with the radio frequency front-end circuit.
The embodiment of the application also provides an antenna switching method which is applied to the radio frequency front-end circuit, and in the antenna switching method, when the radio frequency front-end circuit is in a single-frequency working mode, the switch switching module is controlled to communicate the first power amplifier or the second power amplifier with the second antenna; when the radio frequency front-end circuit is in the dual-frequency working mode, the control switch switching module is used for communicating the first power amplifier with the first antenna and communicating the second power amplifier with the second antenna.
According to the radio frequency front-end circuit, the antenna switching method and the mobile terminal, the switch switching module is arranged in the radio frequency front-end circuit, so that the antenna with highest efficiency can be selected to form a transmitting path when the radio frequency front-end circuit works at a single frequency, the antenna with highest efficiency can be used for transmitting the 4G radio frequency signal and the 5G radio frequency signal, and the performance of the antenna is improved.
Drawings
The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a block diagram of a first configuration of a radio frequency front-end circuit according to an embodiment of the present application.
Fig. 2 is a block diagram of a second structure of a radio frequency front-end circuit according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a first structure of a switch unit in a radio frequency front-end circuit according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a second structure of a switch unit in a radio frequency front-end circuit according to an embodiment of the present application.
Fig. 5 is a flowchart of an antenna switching method 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 accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defining "first," "second," or the like, may explicitly or implicitly include one or more features, and in the description of the present invention, a meaning of "a plurality" is two or more, unless otherwise specifically defined.
Referring to fig. 1, the present embodiment provides a radio frequency front-end circuit, which includes a first power amplifier 11, a second power amplifier 12, and a switch switching module 20, wherein the switch switching module 20 is respectively connected to the first power amplifier 11 and the second power amplifier 12, and the switch switching module 20 is also respectively connected to a first antenna 31 and a second antenna 32; wherein the efficiency of the second antenna 32 is higher than the efficiency of the first antenna 31.
In specific implementation, the first power amplifier 11 is used for outputting a 4G radio frequency signal, and the second power amplifier 12 is used for outputting a 5G radio frequency signal; when the radio frequency front end circuit is in the single frequency mode of operation, the switch-and-switch module 20 is configured to communicate the first power amplifier 11 or the second power amplifier 12 with the second antenna 32 to form a respective transmit path; the radio frequency front-end circuit transmits a 4G radio frequency signal or a 5G radio frequency signal in a single frequency working mode, namely, the radio frequency front-end circuit only transmits one of the 4G radio frequency signal and the 5G radio frequency signal in the single frequency working mode. When the radio frequency front end circuit is in the dual frequency mode of operation, the switch-and-switch module 20 is configured to communicate the first power amplifier 11 with the first antenna 31 to form a transmit path, and to communicate the second power amplifier 12 with the second antenna 32 to form another transmit path; the rf front-end circuit transmits the 4G rf signal and the 5G rf signal in the dual-frequency mode, that is, when the rf front-end circuit is in the dual-frequency mode, the first power amplifier 11 and the second power amplifier 12 operate simultaneously, so that the rf front-end circuit transmits the 4G rf signal and the 5G rf signal simultaneously.
According to the application, the switch switching module 20 is arranged, so that the antenna with highest efficiency can be selected to form a transmitting path when the radio frequency front-end circuit works at a single frequency, and therefore, the antenna with highest efficiency can be used for transmitting the 4G radio frequency signal and the 5G radio frequency signal, and the antenna performance is optimized.
Referring to fig. 2, in some embodiments, the first power amplifier 11 has a plurality of first transmit ports, and the second power amplifier 12 has a plurality of second transmit ports; the frequency bands of the 4G radio frequency signals output by each first transmitting port are different, and the frequency bands of the 5G radio frequency signals output by each second transmitting port are different; the first power amplifier 11 and the second power amplifier 12 in this embodiment can support radio frequency signals in a plurality of different frequency bands. For example, the first power amplifier 11 is provided with three first transmitting ports, namely a B8 port, a B1 port and a B7 port, and frequency bands corresponding to radio frequency signals transmitted by the three ports are B8, B1 and B7; the second power amplifier 12 is provided with three second transmitting ports, namely an N8 port, an N1 port and an N7 port, and the frequency bands corresponding to the radio frequency signals transmitted by the three ports are respectively N8, N1 and N7. Wherein B8 and N8 are radio frequency signals with the same frequency, B1 and N1 are radio frequency signals with the same frequency, and B7 and N7 are radio frequency signals with the same frequency.
In some embodiments, the switch-switching module 20 comprises one or more switch-switching units 21; each switch switching unit 21 is correspondingly connected to a first transmitting port and a second transmitting port, each switch switching unit 21 is connected to a first antenna 31 and a second antenna 32, where frequency bands of radio frequency signals output by the first transmitting port and the second transmitting port connected to the same switch switching unit 21 are the same, for example, a B7 port and an N8 port are simultaneously connected to one switch switching unit 21, and a B1 port and an N1 port are simultaneously connected to one switch switching unit 21. In this embodiment, a switch switching unit 21 is correspondingly provided for a group of first transmitting ports and second transmitting ports, and the switch switching unit 21 is switchably connected with the first antenna 31 or the second antenna 32, so as to realize flexible switching of transmitting paths, and further ensure that the radio frequency front-end circuit can select an antenna with higher efficiency in a single-frequency working mode, so as to improve the antenna performance.
In some embodiments, when the switch switching unit 21 is plural, the radio frequency front end circuit further includes a first integrated switch 41 and a second integrated switch 42; the first integrated switch 41 is connected to the first antenna 31 and each of the switch switching units 21, and the second integrated switch 42 is connected to the second antenna 32 and each of the switch switching units 21; the first integrated switch 41 is configured to combine the radio frequency signals output by the switch switching units 21 and output the combined radio frequency signals to the first antenna 31, and the second integrated switch 42 is configured to combine the radio frequency signals output by the switch switching units 21 and output the combined radio frequency signals to the second antenna 32. The first integrated switch 41 and the second integrated switch 42 in this embodiment are both a module integrated with a switch and a frequency divider, and support frequencies of multiple frequency bands, so that multiple radio frequency signals can be combined into one path to be connected to an antenna, and signals received by the antenna can be distributed to different receiving paths according to the frequencies.
Referring to fig. 3, in some embodiments, the rf front-end circuit further includes a receiving module, a first duplexer T1, and a second duplexer T2; the number of the first diplexers T1 is the same as the number of the switching units 21, and the number of the second diplexers T2 is the same as the number of the switching units 21; the receiving end of the first duplexer T1 is connected with the receiving module, the transmitting end of the first duplexer T1 is correspondingly connected with a switch switching unit 21, the public end of the first duplexer T1 is connected with the first integrated switch 41, the receiving end of the second duplexer T2 is connected with the receiving module, the transmitting end of the second duplexer T2 is correspondingly connected with the switch switching unit 21, and the public end of the second duplexer T2 is connected with the second integrated switch 42.
The antenna is connected to the integrated switch, and then connected to the receiving module via the duplexer to form a receiving path, and the first power amplifier 11 or the second power amplifier 12 is connected to the switch switching unit 21, and then connected to the integrated switch via the duplexer to form a transmitting path. The duplexer in this embodiment is a radio frequency device, and the duplexer can combine the transmitting path and the receiving path of the radio frequency signal to become one path. Meanwhile, the duplexer can be a frequency-selecting device, can separate a received radio frequency signal from a transmitted radio frequency signal according to different frequencies, is different from a switch, and can ensure that a transmitting passage and a receiving passage are always in a connection state without interruption.
As an embodiment, the first antenna 31 and the second antenna 32 are both transceiver antennas, that is, the first antenna 31 can support both transmitting and receiving functions, and support multiple frequency bands, including high, medium and low frequency bands. Specifically, the first antenna 31 supports transmission and reception of 4G radio frequency signals, and also supports transmission and reception of 5G radio frequency signals. Likewise, the second antenna 32 may also support both transmitting and receiving functions, and may support multiple frequency bands, including high, medium, and low frequency bands. Specifically, the second antenna 32 supports transmission and reception of 4G radio frequency signals, as well as transmission and reception of 5G radio frequency signals.
In some embodiments, the rf front-end circuit further includes a third antenna 33 and a fourth antenna 34, where the third antenna 33 is correspondingly connected to a third integrated switch 43, and the fourth antenna 34 is correspondingly connected to an integrated switch; the efficiency of both the third antenna 33 and the fourth antenna 34 is less than the efficiency of the first antenna 31. That is, among the first antenna 31, the second antenna 32, the third antenna 33, and the fourth antenna 34, the second antenna 32 has the highest efficiency, and the first antenna 31 has the next highest efficiency. The first antenna 31, the second antenna 32, the third antenna 33, and the fourth antenna 34 in the present embodiment each support a reception function, whereby a MIMO (multiple input multiple output) function can be realized with a plurality of reception antennas, improving the transmission rate and throughput.
As an embodiment, the receiving module in this embodiment includes four receiving modules, which in at least one embodiment are a main set receiving module, a diversity receiving module, a MIMO receiving module, and a MIMO diversity receiving module, respectively. The first antenna 31 may be used as a receiving antenna of the main set receiving module, the second antenna 32 may be used as a receiving antenna of the diversity receiving module, the third antenna 33 may be used as a receiving antenna of the MIMO receiving module, and the fourth antenna 34 may be used as a receiving antenna of the MIMO diversity receiving module.
As an embodiment, each receiving module is provided with three receiving ports, wherein the three receiving ports are a B8/N8 port, a B1/N1 port and a B7/N7 port, the B8/N8 port can receive radio frequency signals of a B8 frequency band and a N8 frequency band, the B1/N1 port can receive radio frequency signals of a B1 frequency band and a N1 frequency band, and the B7/N7 port can receive radio frequency signals of a B7 frequency band and a N7 frequency band. Each receiving port in the MIMO diversity receiving module is connected to the fourth integrated switch 44, and each receiving port in the MIMO receiving module is connected to the third integrated switch 43; correspondingly, the third antenna 33 connected to the third integrated switch 43 and the fourth antenna 34 connected to the fourth integrated switch 44 support the receiving function, and can support multiple frequency bands including high, middle and low frequency bands, and can support the receiving of the 4G radio frequency signal and also support the receiving of the 5G radio frequency signal. And each receiving port in the main set receiving module is correspondingly connected with the receiving end of one first duplexer T1, and each receiving port in the diversity receiving module is correspondingly connected with the receiving end of one second duplexer T2.
With continued reference to fig. 3, as an embodiment, the switch switching unit 21 includes a double-pole double-throw switch, where a first input end of the double-pole double-throw switch D1 is connected to the first transmitting port, a second input end of the double-pole double-throw switch D1 is connected to the second transmitting port, a first output end of the double-pole double-throw switch D1 is connected to the transmitting end of the first duplexer T1, and a second output end of the double-pole double-throw switch D1 is connected to the transmitting end of the second duplexer T2.
When the rf front-end circuit only transmits and receives the 4G rf signal in the single-frequency operation mode, the second antenna 32 with the highest efficiency can be ensured to be used as the transmitting antenna by switching the double pole double throw switch D1. For example, when the first power amplifier 11 transmits a radio frequency signal in the B7 band, the transmitted radio frequency signal is output to the corresponding double pole double throw switch D1 through the B7 port of the first power amplifier 11, the radio frequency signal is sent to the second duplexer T2 through the switching on of the double pole double throw switch D1, and then output to the second antenna 32 through the second integrated switch 42, and the radio frequency signal in the B7 band is transmitted through the second antenna 32. During receiving, the radio frequency signals in the B7 frequency band can be simultaneously received by the first antenna 31, the second antenna 32, the third antenna 33 and the fourth antenna 34, and the radio frequency signals in the B7 frequency band are distributed and transmitted to the corresponding diplexer after passing through the integrated switch on the first antenna 31 and the second antenna 32, and then transmitted to the B7/N7 port of the receiving module through the receiving end of the corresponding diplexer, and further enter the receiving module for demodulation. On the third antenna 33 and the fourth antenna 34, the radio frequency signals in the B7 frequency band are distributed to the B7 corresponding port after passing through the integrated switch, and then transmitted to the B7/N7 port of the receiving module, and enter the receiving module for demodulation.
When the rf front-end circuit only receives and transmits the 5G rf signal in the single-frequency operation mode, the second antenna 32 with the highest efficiency can be ensured to be used as the transmitting antenna by switching the double pole double throw switch D1. For example, when the second amplifier transmits the radio frequency signal in the N7 frequency band, the transmitted radio frequency signal is output to the corresponding double pole double throw switch D1 through the N7 port of the second power amplifier 12, the radio frequency signal is sent to the second duplexer T2 through the switching on of the double pole double throw switch D1, and then is output to the second antenna 32 through the second integrated switch 42, and the radio frequency signal in the N7 frequency band is transmitted through the second antenna 32. During receiving, the first antenna 31, the second antenna 32, the third antenna 33 and the fourth antenna 34 can simultaneously receive the radio frequency signals of the N7 frequency band on the first antenna 31 and the second antenna 32, the radio frequency signals are distributed to the corresponding diplexer after passing through the integrated switch, and then the radio frequency signals are transmitted to the B7/N7 port of the receiving module through the receiving end of the corresponding diplexer, and then enter the receiving module for demodulation. On the third antenna 33 and the fourth antenna 34, the radio frequency signals in the N7 frequency band are distributed to the N7 corresponding port after passing through the integrated switch, and then transmitted to the B7/N7 port of the receiving module, and enter the receiving module for demodulation.
In the single-frequency working mode, the radio frequency front-end circuit in this embodiment can use the second antenna 32 with the highest efficiency as the transmitting antenna no matter the radio frequency signal with the 4G or the radio frequency signal with the 5G is transmitted, so that the idling of the high-efficiency antenna can be avoided, the antenna resource can be fully utilized, and the communication performance of the product is optimal.
When the rf front-end circuit is in the dual-frequency operation mode, that is, the 4G rf signal and the 5G rf signal are simultaneously received and transmitted, the switching of the double-pole double-throw switch D1 can make the 5G rf signal transmit using the second antenna 32 and the 4G rf signal transmit using the first antenna 31. For example, during transmission, the second power amplifier 12 transmits the radio frequency signal in the N7 frequency band from the N7 port, is turned on by switching of the double pole double throw switch D1, and is sent to the corresponding second duplexer T2, and is then transmitted from the second antenna 32 through the second integrated switch 42. Meanwhile, the first power amplifier 11 outputs a radio frequency signal in the B7 frequency band from the B7 port, and transmits the radio frequency signal to the corresponding first duplexer T1 through the corresponding double pole double throw switch D1, and then is transmitted by the first antenna 31 through the first integrated switch 41. During receiving, the radio frequency signals in the N7 frequency band are received through the first antenna 31, the second antenna 32, the third antenna 33 and the fourth antenna 34, the radio frequency signals in the N7 frequency band are distributed and transmitted to corresponding diplexers after passing through the integrated switch on the first antenna 31 and the second antenna 32, and then are transmitted to the B7/N7 port of the receiving module through the receiving end of the corresponding diplexer, and then enter the receiving module for demodulation. On the third antenna 33 and the fourth antenna 34, the radio frequency signals in the N7 frequency band are distributed to the N7 corresponding port after passing through the integrated switch, and then transmitted to the B7/N7 port of the receiving module, and enter the receiving module for demodulation. Similarly, the radio frequency signals in the B7 band are simultaneously received by the first antenna 31, the second antenna 32, the third antenna 33 and the fourth antenna 34, and on the first antenna 31 and the second antenna 32, the radio frequency signals in the B7 band are distributed and transmitted to the corresponding diplexer after passing through the integrated switch, and then transmitted to the B7/N7 port of the receiving module through the receiving end of the corresponding diplexer, and further enter the receiving module for demodulation. On the third antenna 33 and the fourth antenna 34, the radio frequency signals in the B7 frequency band are distributed to the B7 corresponding port after passing through the integrated switch, and then transmitted to the B7/N7 port of the receiving module, and enter the receiving module for demodulation.
In this embodiment, on the same receiving channel, the radio frequency signal in the B7 band and the receiving signal in the radio frequency signal in the N7 band are transmitted simultaneously, because the B7 and N7 are the same frequency. If the two different-frequency dual-frequency radio frequency signals are two different-frequency dual-frequency radio frequency signals, the respective received signals are respectively transmitted on different receiving paths and enter the receiving module for demodulation.
Referring to fig. 4, as an embodiment, the switch switching unit 21 includes a first single-pole double-throw switch S1 and a second single-pole double-throw switch S2, wherein a common end of the first single-pole double-throw switch S1 is connected to the first transmitting port, a first connection end of the first single-pole double-throw switch S1 is connected to the transmitting end of the first duplexer T1, a second connection end of the first single-pole double-throw switch S1 is connected to a first connection end of the second single-pole double-throw switch S2, a second connection end of the second single-pole double-throw switch S2 is connected to the second transmitting port, and a common end of the second single-pole double-throw switch S2 is connected to the transmitting end of the second duplexer T2.
Unlike the double pole double throw switch D1, two single pole double throw switches may be provided for switching in the present embodiment. When the radio frequency front-end circuit only receives and transmits a 4G radio frequency signal in a single-frequency working mode, the B7 port of the first power amplifier 11 outputs the radio frequency signal to the public end of the corresponding first single-pole double-throw switch S1; after the radio frequency signal is switched by the first single-pole double-throw switch S1 and the second single-pole double-throw switch S2, the radio frequency signal is output to the corresponding second duplexer T2 through the common end of the second single-pole double-throw switch S2 after passing through the second connection end of the first single-pole double-throw switch S1 to the first connection end of the corresponding second single-pole double-throw switch S2, and is emitted by the second antenna 32 after passing through the second integrated switch 42. When the rf front-end circuit only receives and transmits the 5G rf signal in the single-frequency operation mode, the N7 port of the second power amplifier 12 outputs the rf signal to the second connection end of the corresponding second single-pole double-throw switch S2, outputs the rf signal to the corresponding second duplexer T2 through the common end of the second single-pole double-throw switch S2, and then outputs the rf signal through the second antenna 32 after passing through the second integrated switch 42.
When the rf front-end circuit is in the dual-frequency mode, i.e. simultaneously receives and transmits the 4G rf signal and the 5G rf signal, the switching of the two single-pole double-throw switches can make the 5G rf signal transmit using the second antenna 32 and the 4G rf signal transmit using the first antenna 31. When transmitting the radio frequency signal with the same frequency, the second power amplifier 12 transmits the radio frequency signal with the N7 frequency band from the N7 port to the second connection end of the second single-pole double-throw switch S2, outputs the radio frequency signal to the corresponding second duplexer T2 through the common end of the second single-pole double-throw switch S2, and then transmits the radio frequency signal to the second antenna 32 through the second integrated switch 42. Meanwhile, the first power amplifier 11 outputs a radio frequency signal in the B7 frequency band from the B7 port, and the radio frequency signal is transmitted to the corresponding first duplexer T1 through the first connection end of the first single pole double throw switch S1, and then is transmitted by the first antenna 31 after passing through the first integrated switch 41. When transmitting two radio frequency signals with different frequency bands, for example, transmitting the radio frequency signals with the N7 frequency band and the B1 frequency band respectively, the two single-pole double-throw switches of the respective transmitting paths switch to transmit the radio frequency signals with the N7 frequency band through the second antenna 32 and transmit the radio frequency signals with the B1 frequency band through the first antenna 31.
The embodiment of the application also provides a mobile terminal which comprises the radio frequency front-end circuit, wherein the second antenna is used as the antenna with highest efficiency in the mobile terminal, and the second antenna is distributed and arranged at a position with better space environment in the mobile terminal, such as the bottom position of the mobile terminal; and the first antenna is used as a second high-efficiency antenna, and the first antenna can be distributed and arranged at the top position of the mobile terminal. According to the application, the switch switching module is arranged in the radio frequency front-end circuit, so that the antenna with highest efficiency can be selected to form a transmitting path when the mobile terminal works at a single frequency, thereby ensuring that the antenna with highest efficiency can be used for transmitting the 4G radio frequency signal and the 5G radio frequency signal, optimizing the performance of the antenna and ensuring the communication performance of the mobile terminal. Since the rf front-end circuit is described in detail above, it is not described here in detail.
Referring to fig. 5, an embodiment of the present application further provides an antenna switching method, where the antenna switching method is applied to the radio frequency front-end circuit, and the antenna switching method includes:
100. when the radio frequency front-end circuit is in a single-frequency working mode, the switch switching module is controlled to communicate the first power amplifier or the second power amplifier with the second antenna.
200. When the radio frequency front-end circuit is in the dual-frequency working mode, the control switch switching module is used for communicating the first power amplifier with the first antenna and communicating the second power amplifier with the second antenna.
According to the application, an antenna for transmitting radio frequency signals is selected according to the working mode of the mobile terminal, specifically, when the mobile terminal is in a single-frequency working mode, a switch switching module in a radio frequency front-end circuit is controlled to communicate a first power amplifier or a second power amplifier with a second antenna; when in the dual-frequency working mode, the control switch switching module is used for communicating the first power amplifier with the first antenna and communicating the second power amplifier with the second antenna; wherein the efficiency of the second antenna is greater than the efficiency of the first antenna. Therefore, in the single-frequency working mode, whether the 4G radio frequency signal or the 5G radio frequency signal is transmitted, the second antenna with the highest efficiency can be used as the transmitting antenna, so that the idling of the high-efficiency antenna can be avoided, the antenna resource can be fully utilized, and the communication performance of the product is optimal.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The rf front-end circuit provided by the embodiment of the present application is described in detail, and specific examples are applied to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only for helping to understand the technical solution and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. A radio frequency front-end circuit, comprising:
the first power amplifier is used for outputting a 4G radio frequency signal;
the second power amplifier is used for outputting a 5G radio frequency signal;
The switch switching module is respectively connected with the first power amplifier and the second power amplifier, and is also respectively connected with the first antenna and the second antenna; wherein the efficiency of the second antenna is higher than the efficiency of the first antenna;
When the radio frequency front end circuit is in a single frequency working mode, the switch switching module is configured to communicate the first power amplifier or the second power amplifier with the second antenna; the radio frequency front-end circuit transmits the 4G radio frequency signal or the 5G radio frequency signal in a single-frequency working mode;
When the radio frequency front end circuit is in a dual-frequency working mode, the switch switching module is configured to communicate the first power amplifier with the first antenna and communicate the second power amplifier with the second antenna; the radio frequency front-end circuit transmits the 4G radio frequency signal and the 5G radio frequency signal in a double-frequency working mode.
2. The radio frequency front-end circuit of claim 1, wherein the first power amplifier has a plurality of first transmit ports and the second power amplifier has a plurality of second transmit ports; the frequency bands of the 4G radio frequency signals output by the first transmitting ports are different, and the frequency bands of the 5G radio frequency signals output by the second transmitting ports are different.
3. The radio frequency front-end circuit of claim 2, wherein the switch-switching module comprises one or more switch-switching units; each switch switching unit is correspondingly connected with one first transmitting port and one second transmitting port, and the frequency bands of radio frequency signals output by the first transmitting port and the second transmitting port which are connected with the same switch switching unit are the same.
4. The radio frequency front-end circuit of claim 3, wherein when the switch switching unit is plural, the radio frequency front-end circuit further comprises:
The first integrated switch is connected with the first antenna and each switch switching unit, and is used for combining radio frequency signals output by each switch switching unit and outputting the radio frequency signals to the first antenna;
the second integrated switch is connected with the second antenna and each switch switching unit, and the second integrated switch is used for combining radio frequency signals output by each switch switching unit and outputting the radio frequency signals to the second antenna.
5. The radio frequency front-end circuit of claim 4, further comprising:
a receiving module;
The number of the first diplexers is the same as that of the switch switching units, the receiving end of the first diplexer is connected with the receiving module, the transmitting end of the first diplexer is correspondingly connected with one switch switching unit, and the public end of the first diplexer is connected with the first integrated switch;
the number of the second diplexers is the same as that of the switch switching units, the receiving end of the second diplexer is connected with the receiving module, the transmitting end of the second diplexer is correspondingly connected with one switch switching unit, and the public end of the second diplexer is connected with the second integrated switch.
6. The radio frequency front end circuit of claim 5, wherein the switch switching unit comprises a double pole double throw switch, a first input of the double pole double throw switch is connected to the first transmit port, a second input of the double pole double throw switch is connected to the second transmit port, a first output of the double pole double throw switch is connected to the transmit end of the first diplexer, and a second output of the double pole double throw switch is connected to the transmit end of the second diplexer.
7. The radio frequency front end circuit of claim 5, wherein the switch switching unit comprises a first single pole double throw switch and a second single pole double throw switch, wherein a common end of the first single pole double throw switch is connected to the first transmit port, a first connection end of the first single pole double throw switch is connected to the transmit end of the first diplexer, a second connection end of the first single pole double throw switch is connected to a first connection end of the second single pole double throw switch, a second connection end of the second single pole double throw switch is connected to the second transmit port, and a common end of the second single pole double throw switch is connected to the transmit end of the second diplexer.
8. The radio frequency front-end circuit of claim 5, wherein the first antenna and the second antenna are both transmit-receive antennas.
9. A mobile terminal, characterized in that the radio frequency front-end circuit according to any of claims 1-8 is provided in the mobile terminal.
10. An antenna switching method, wherein the antenna switching method is applied to the radio frequency front-end circuit according to any one of claims 1 to 8, and the antenna switching method comprises:
When the radio frequency front-end circuit is in a single-frequency working mode, the switch switching module is controlled to be communicated with the first power amplifier or the second power amplifier and the second antenna;
When the radio frequency front-end circuit is in a dual-frequency working mode, the switch switching module is controlled to be communicated with the first power amplifier and the first antenna, and the second power amplifier is controlled to be communicated with the second antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410093071.4A CN117997372A (en) | 2024-01-22 | 2024-01-22 | Radio frequency front-end circuit, antenna switching method and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410093071.4A CN117997372A (en) | 2024-01-22 | 2024-01-22 | Radio frequency front-end circuit, antenna switching method and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117997372A true CN117997372A (en) | 2024-05-07 |
Family
ID=90896630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410093071.4A Pending CN117997372A (en) | 2024-01-22 | 2024-01-22 | Radio frequency front-end circuit, antenna switching method and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117997372A (en) |
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2024
- 2024-01-22 CN CN202410093071.4A patent/CN117997372A/en active Pending
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