CN112751573B - Radio frequency front-end module, transceiver and communication terminal - Google Patents
Radio frequency front-end module, transceiver and communication terminal Download PDFInfo
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- CN112751573B CN112751573B CN201911045768.XA CN201911045768A CN112751573B CN 112751573 B CN112751573 B CN 112751573B CN 201911045768 A CN201911045768 A CN 201911045768A CN 112751573 B CN112751573 B CN 112751573B
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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
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application discloses a radio frequency front end module, a transceiver and a communication terminal. The radio frequency front end module comprises a first signal channel used for transmitting a first frequency band signal; the second signal channel is used for transmitting a second frequency band signal, wherein the second frequency band signal is a radio frequency signal which is different from the first frequency band signal network in generation and has an overlapped frequency spectrum range; the switch unit is connected with the first signal channel and the second signal channel and used for switching between the first signal channel and the second signal channel so as to enable any one of the first signal channel and the second signal channel to be communicated with an antenna. By the technical scheme of the embodiment of the application, two frequency band signals with different network generations and overlapped frequency spectrum ranges can share one antenna transceiving link, the number of transceiving antennas is reduced, the structure of a transceiving device of a communication terminal is simplified, the space size of the transceiving device is reduced, and the hardware cost of the transceiving device is reduced.
Description
Technical Field
The application relates to a radio frequency front-end module, a transceiver and a communication terminal.
Background
As is well known, spectrum resources are non-renewable and scarce resources, which are the key points for the competition of various operators and are also resources that equipment manufacturers want to try to help the operators to exert the maximum value.
From the development track of mobile communication development, coexistence of different era technologies is a common phenomenon. For example, as the 5G era comes, the spectrum resource distribution will become complicated, not only the high, middle and low frequency spectrums coexist, but also the spectrum is shared with the 3G and 4G. In order to support more different network systems and simultaneously support frequency bands sharing the same frequency spectrum in different networks, the structure of the antenna of the 5G communication terminal becomes more complicated, which brings great challenges to the structural design of communication terminal equipment, especially mobile terminal products.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
On one hand, the embodiment of the application provides a radio frequency front-end module, a transceiver device and a communication terminal, so that the communication terminal can simultaneously support frequency bands sharing the same frequency spectrum in different inter-generation networks, and the number of transceiver antennas of the communication terminal can be reduced and the area of the layout of the transceiver antennas can be reduced.
In another aspect, an embodiment of the present application provides a radio frequency front end module, including:
a first signal channel for transmitting a first frequency band signal;
the second signal channel is used for transmitting a second frequency band signal, wherein the second frequency band signal is a radio frequency signal which is different from the first frequency band signal network in generation and has an overlapped frequency spectrum range;
the switch unit is connected with the first signal channel and the second signal channel and used for switching between the first signal channel and the second signal channel so as to enable any one of the first signal channel and the second signal channel to be communicated with an antenna.
On the other hand, an embodiment of the present application provides a transceiver apparatus, including: the base band module, the transceiving module, the radio frequency front end module and the antenna are arranged in the base band module; the baseband module comprises a first baseband module and a second baseband module; the transceiver module comprises a first transceiver module and a second transceiver module; the first baseband module is connected to the radio frequency front end module through the first transceiver module; the second baseband module is connected to the radio frequency front end module through the second transceiver module; the antenna is connected to the radio frequency front end module.
In another aspect, an embodiment of the present application provides a communication terminal, including the transceiver device.
The embodiment of the application comprises the following steps: a first signal channel for transmitting a first frequency band signal; the second signal channel is used for transmitting a second frequency band signal, wherein the second frequency band signal is a radio frequency signal which is different from the first frequency band signal network in generation and has an overlapped frequency spectrum range; the switch unit is connected with the first signal channel and the second signal channel and used for switching between the first signal channel and the second signal channel so as to enable any one of the first signal channel and the second signal channel to be communicated with an antenna. By the technical scheme of the embodiment of the application, two frequency band signals with different network generations and overlapped frequency spectrum ranges can share one antenna transceiving link, the number of transceiving antennas is reduced, the structure of a transceiving device of a communication terminal is simplified, the space size of the transceiving device is reduced, and the hardware cost of the transceiving device is reduced.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.
Fig. 1 is an exemplary structural diagram of a transceiver device according to an embodiment of the present application;
fig. 2 is an exemplary structural diagram of another transceiver device according to an embodiment of the present application;
fig. 3 is an exemplary structural diagram of another transceiver device according to an embodiment of the present application;
fig. 4 is an exemplary structural diagram of another transceiver device according to an embodiment of the present application;
FIG. 5 is a Smith chart of impedance matching for the RF front end module in an embodiment of the application;
fig. 6 is an exemplary structural diagram of another transceiver device according to an embodiment of the present application;
fig. 7 is an exemplary structural diagram of a signal channel of the rf front-end module in the embodiment of the present application;
fig. 8 is an exemplary structural diagram of another signal channel of the rf front-end module in the embodiment of the present application;
fig. 9 is an exemplary configuration diagram of a communication terminal in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that although the functional modules are divided in the schematic diagram of the apparatus, in some cases, the functional modules may be divided differently from the modules in the apparatus. The terms first, second and the like in the description and in the claims, as well as in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
As is well known, spectrum resources are non-renewable and scarce resources, which are the key points for the competition of various operators and are also resources that equipment manufacturers want to try to help the operators to exert the maximum value. In the 5G era, spectrum resource distribution becomes complicated, and not only does high, middle, and low frequency spectrum coexist, but also spectrum is shared with 3G and 4G.
From the development track of mobile communication development, coexistence of different era technologies is a common phenomenon. For example, a 5G network has been built at present, before the 5G network is developed and matured, a 4G network and the 5G network coexist complementarily for a long time, and a 5G communication terminal adopts a Non-standalone Networking (NSA) mode to support more different generation network systems and simultaneously support frequency bands sharing the same frequency spectrum in different generation networks, which makes an antenna structure of the 5G communication terminal more complicated, and brings great challenges to the structural design of a communication terminal 1 device, especially a mobile terminal product.
In view of this, embodiments of the present application provide a radio frequency front end module, a transceiver device, and a communication terminal, so that the communication terminal can simultaneously support frequency bands sharing the same frequency spectrum in different inter-generation networks, and can reduce the number of transceiver antennas of the communication terminal and reduce the area of the layout of the transceiver antennas.
For convenience of understanding the rf front-end module provided in the embodiment of the present application, an application scenario of the rf front-end module provided in the embodiment of the present application is first described below, where the rf front-end module is applied to a transceiver of a communication terminal. The transceiver specifically comprises a baseband module, a transceiver module, a radio frequency front end module and an antenna. The transmitting and receiving communication of the communication terminal can be realized through the transmitting and receiving device.
Fig. 1 illustrates a transceiver 10 according to an embodiment of the present disclosure. As shown in fig. 1, the baseband module 11 includes a first baseband module 111 and a second baseband module 112; the transceiver module 12 includes a first transceiver module 121 and a second transceiver module 122. The first baseband module 111 is connected to the rf front end module 13 through the first transceiver module 121; the second baseband module 112 is connected to the rf front end module 13 through the second transceiver module 122; the antenna 14 is connected to the radio frequency front end module 13.
The first baseband module 111 is configured to receive and transmit a first baseband signal; the second baseband module 112 is configured to receive and transmit a second baseband signal, where the second baseband signal is a signal different from the first baseband signal in terms of network substitution; the first transceiver module 121 is configured to convert the first baseband signal output by the first baseband module 111 into a first radio frequency signal, and output the first radio frequency signal to the radio frequency front end module 13; the first transceiver module 121 is further configured to receive a first radio frequency signal output by the radio frequency front-end module 13, convert the first radio frequency signal into a first baseband signal, and output the first baseband signal to the first baseband module 111, where the first radio frequency signal includes a first frequency band signal; the second transceiver module 122 is configured to convert the second baseband signal output by the second baseband module 112 into a second radio frequency signal, and output the second radio frequency signal to the radio frequency front end module 13; the second transceiver module 122 is further configured to convert the second radio frequency signal into a second baseband signal after receiving the second radio frequency signal output by the radio frequency front end module 13, and output the second baseband signal to the second baseband module 112, where the second radio frequency signal includes a second frequency band signal. Here, the second band signal is a radio frequency signal whose frequency spectrum range overlaps with the frequency spectrum range of the first band signal.
Illustratively, the first baseband module 111 may be a 4G baseband module. When the signal is in the uplink transmission direction, the 4G baseband module sends a 4G baseband signal to the first transceiver module 121, and the first transceiver module 121 performs, for example, modulation, filtering, shaping, digital-to-analog conversion, and up-conversion on the 4G baseband signal output by the 4G baseband module, converts the 4G baseband signal into a 4G radio frequency signal with different frequency bands, and outputs the 4G radio frequency signal to the radio frequency front-end module 13; when the signal is in the downlink transmission direction, the first transceiver module 121 receives the 4G radio frequency signal output by the radio frequency front end module 13, and converts the first radio frequency signal into a 4G baseband signal after performing down conversion, digital-to-analog conversion, and filtering processing, and outputs the 4G baseband signal to the 4G baseband module.
Illustratively, the second baseband module 112 may be a 5G baseband module. When the signal is in the uplink transmission direction, the 5G baseband module sends the 5G baseband signal to the second transceiver module 122, and the second transceiver module 122 performs, for example, modulation, filtering shaping, digital-to-analog conversion, and up-conversion on the 5G baseband signal output by the 5G baseband module, converts the signal into a 5G radio frequency signal of different frequency bands, and outputs the signal to the radio frequency front-end module 13; when the signal is in the downlink transmission direction, the first transceiver module 121 receives the 5G rf signal output by the rf front-end module 13, and converts the 5G rf signal into a 5G baseband signal after performing down-conversion, digital-to-analog conversion, and filtering, for example, and outputs the 5G baseband signal to the 5G baseband module.
As shown in fig. 1, the rf front-end module 13 provided in the embodiment of the present application may include a first signal path 131, a second signal path 132, and a switch unit 135. The first signal channel 131 is used for transmitting a first frequency band signal; a second signal path 132 for transmitting second frequency band signals; the switch unit 135 is connected to the first signal channel 131, the second signal channel 132 and the antenna 14, and the switch unit 135 is used for switching between the first signal channel 131 and the second signal channel 132, so that any one of the first signal channel 131 and the second signal channel 132 is communicated with the antenna 14, and the antenna 14 can be used for transmitting and receiving any one of the first frequency band signal and the second frequency band signal.
It should be understood that the first frequency band signal and the second frequency band signal are radio frequency signals with different networks and overlapping frequency spectrum ranges. For example, the first frequency band signal may be a 4G B41 frequency band, the second frequency band signal may be a 5G N41 frequency band, and the frequency ranges of the B41 frequency band and the N41 frequency band are overlapped (2496 Mhz-2690 Mhz). In the embodiment of the present application, the switch unit 135 is used to switch the first signal channel 131 and the second signal channel 132, so that the first frequency band signal and the second frequency band signal share a transceiving link and one antenna 14 to implement transceiving of the frequency band signal, thereby achieving the purpose of reducing the number of antennas 14 of the communication terminal 1 and reducing the layout area of the antennas 14.
Referring to fig. 2, in an embodiment, the first radio frequency signal transceived by the first transceiver module 121 further includes n third frequency band signals. The rf front-end module 13 includes n third signal channels (e.g., 133a, 133b marked in fig. 2), where the n third signal channels are used for correspondingly transmitting n third frequency band signals, where n is an integer and n is greater than or equal to 1. Here, the n third band signals are radio frequency signals having the same frequency spectrum as the first band signal network and non-overlapping frequency spectrum ranges.
In the exemplary embodiment of fig. 2, the switching unit 135 may specifically include a first switch 1351 and a second switch 1352. The active end of the first switch 1351 is connected to the first signal channel 131 and the n third signal channels, and the first frequency band signal and the n third frequency band signals are subjected to Carrier Aggregation (CA) through the first switch 1351 to form a Carrier aggregation signal. The active end of the second switch 1352 is connected to the fixed end of the first switch 1351 and the second signal channel 132, the fixed end of the second switch 1352 is connected to the antenna 14, and the second switch 1352 is used for switching between the first switch 1351 and the second signal channel 132, so as to perform transceiving transmission of any one of the carrier aggregation signal and the second frequency band signal through the antenna 14. Specifically, the first switch 1351 and the second switch 1352 may each be a single-pole, multi-throw switch.
Assuming that N =2, as shown in fig. 2, the rf front-end module 13 has two third signal channels 133a and 133B, and the two third signal channels 133a and 133B are respectively used for transmitting two third frequency band signals with different frequency bands, where taking the B41 frequency band in which the first frequency band signal is 4G and the N41 frequency band in which the second frequency band signal is 5G as an example, the two third frequency band signals with different frequency bands may be a B1 frequency band and a B3 frequency band of a 4G network, respectively. Three active terminals of the first switch 1351 are correspondingly connected to signal channels of a B41 frequency band, a B1 frequency band and a B3 frequency band.
When the fixed ends of the second switch 1352 and the first switch 1351 are in an on state, when a signal is in an uplink transmission direction, the first switch 1351 forms a carrier aggregation signal combined by the three frequency band signals by gating the B41 frequency band signal, the B1 frequency band signal and the B3 frequency band signal, and the carrier aggregation signal is output from the fixed end of the first switch 1351 to the second switch 1352 and is transmitted to the outside through the second switch 1352 and the antenna 14; when the signal is in the downlink transmission direction, the antenna 14 receives a carrier aggregation signal composed of a B41 frequency band signal, a B1 frequency band signal, and a B3 frequency band signal from the outside, the carrier aggregation signal is transmitted to the first switch 1351 through the second switch 1352, and then is switched to different signal channels through the first switch 1351, so that frequency division of the carrier aggregation signal is realized, and the B41 frequency band signal, the B1 frequency band signal, and the B3 frequency band signal are output to respective signal channels.
When the second switch 1352 and the second signal channel 132 are in the on state, and the signal is in the uplink transmission direction, the N41 band signal is transmitted to the outside through the second signal channel 132, the second switch 1352 and the antenna 14; when the signal is in the downlink transmission direction, the antenna 14 receives the N41 band signal from the outside, and the N41 band signal is transmitted to the second signal channel 132 through the second switch 1352.
By the technical scheme, the embodiment can realize that radio frequency signals with different generation networks and overlapped frequency spectrum ranges share one transceiving link and one antenna 14 to realize transceiving of frequency band signals, and achieve the purposes of reducing the number of transceiving antennas 14 of the communication terminal 1 and reducing the layout area of the transceiving antennas 14. The radio frequency front-end module 13 of this embodiment can simultaneously implement carrier aggregation, and aggregate a plurality of continuous or discrete carriers together to form a signal with a wider frequency spectrum, which not only meets the requirement in the aspect of communication bandwidth, but also can improve the utilization rate of frequency spectrum resources.
As shown in fig. 2, in some embodiments, the first radio frequency signal transceived by the first transceiving module 121 further includes a fourth frequency band signal. The rf front-end module 13 may further include a fourth signal path 134, where the fourth signal path 134 is used to transmit a fourth frequency band signal. Here, the fourth band signal is a radio frequency signal with the same generation as the first band signal network and non-overlapping spectrum range, for example, in the case that the first band signal is a 4G B41 band, the second band signal is a 5G N41 band, and the third band signal includes a 4G network B1 band and a 4G network B3 band, the fourth band signal may be a B2 band signal. The fourth signal path 134 connects the second switch 1352; the second switch 1352 is also used for switching to the fourth signal channel 134, so as to perform transceiving transmission of a fourth frequency band signal through the antenna 14. It can be understood that, when the second switch 1352 and the fourth signal channel 134 are in the on state, when the signal is in the uplink transmission direction, the B2 band signal is transmitted to the outside through the fourth signal channel 134, the second switch 1352 and the antenna 14; when the signal is in the downlink transmission direction, the antenna 14 receives the B2 frequency band signal from the outside, and the B2 frequency band signal is transmitted to the fourth signal channel 134 through the second switch 1352. Here, the fourth frequency band signal that does not participate in carrier aggregation is transmitted and received via a separate link to the antenna 14, so that the insertion loss of the signal is reduced without carrier aggregation.
Referring to fig. 3, in another embodiment, the switching unit 135 may include a third switch 1353 and a fourth switch 1356; the active end of the third switch 1353 connects the first signal channel 131 and the second signal channel 132 for switching between the first signal channel 131 and the second signal channel 132; a movable end of the fourth switch 1356 is connected to the fixed end of the third switch 1353 and the n third signal channels (133 a, 133 b), any one of the first frequency band signal and the second frequency band signal and the n third frequency band signals are subjected to carrier aggregation through the fourth switch 1356, and a formed carrier aggregation signal is transmitted to the antenna 14 through the fourth switch 1356. The third switch 1353 and the fourth switch 1356 may each be a single-pole, multi-throw switch.
Specifically, continuing to take N =2 as an example, the first band signal is a 4G B41 band signal, the second band signal is a 5G N41 band signal, and the third band signal includes a B1 band signal and a B3 band signal, when the signal is in the uplink transmission direction and the third switch 1353 is switched to the first signal channel 131, the B41 band signal is output to the fourth switch 1356 through the third switch 1353, and the fourth switch 1356 forms a carrier aggregation signal combined by the three band signals by gating the B41 band signal, the B1 band signal and the B3 band signal, and the carrier aggregation signal can be output from the fixed end of the fourth switch 1356 to the antenna 14 and be transmitted to the outside through the antenna 14; when the signal is switched to the first signal channel 131 in the downlink transmission direction and the third switch 1353, the antenna 14 receives a carrier aggregation signal composed of the B41 band signal, the B1 band signal, and the B3 band signal from the outside, and the carrier aggregation signal may implement frequency division of the carrier aggregation signal through the fourth switch 1356, so that the B41 band signal, the B1 band signal, and the B3 band signal are output to respective signal channels.
Similarly, when the signal is in the downlink transmission direction and the third switch 1353 is switched to the second signal channel 132, the N41 band signal is output to the fourth switch 1356 through the third switch 1353, the fourth switch 1356 forms a carrier aggregation signal combined by the three band signals by gating the N41 band signal, the B1 band signal and the B3 band signal, and the carrier aggregation signal can be output to the antenna 14 from the fixed end of the fourth switch 1356 and sent to the outside through the antenna 14; when the signal is switched to the first signal channel 131 in the downlink transmission direction and the third switch 1353, the antenna 14 receives a carrier aggregation signal composed of the N41 band signal, the B1 band signal, and the B3 band signal from the outside, and the carrier aggregation signal can implement frequency division of the carrier aggregation signal through the fourth switch 1356, so that the N41 band signal, the B1 band signal, and the B3 band signal are output to respective signal channels.
The exemplary radio frequency front-end module 13 in fig. 3 can implement that the first frequency band signal and the second frequency band signal, which are different in network generation and have overlapping frequency ranges, share one antenna 14, and can implement that the first frequency band signal or the second frequency band signal performs carrier aggregation with n third frequency band signals correspondingly, thereby meeting the requirement in the aspect of communication bandwidth and improving the utilization rate of frequency spectrum resources.
Referring to fig. 4, in another embodiment, the switch unit 135 may include (n + 2) phase shifter units (e.g., 1354a, 1354b, 1354c, and 1354d shown in fig. 4), where the (n + 2) phase shifter units are connected to the first signal path 131, the second signal path 132, and the n third signal paths (133 a, 133 b), respectively. In this example, each phase shifter element only allows the frequency band signals transmitted by the signal path to which it is connected to pass, while blocking the frequency band signals transmitted by the remaining signal paths.
Still taking N =2, the first band signal is a B41 band signal, the second band signal is an N41 band signal, and the third band signal includes a B1 band signal and a B3 band signal as an example, which is further exemplified below.
Generally, an operator may preferentially allocate a spectrum to a higher-generation network system, that is, the N41 band has a higher priority than the B41 band to use the spectrum resource shared by the two, so that the B41 band and the N41 band do not operate simultaneously. In the example of fig. 4, the phase shift states of the phase shifter elements 1354B, 1354c and 1354d may be set in advance, so that when the B41 frequency band operates, the B41 frequency band signal and the B1 frequency band signal and the B3 frequency band signal can be subjected to carrier aggregation, and the formed carrier aggregation signal is output to the antenna 14. When the N41 band operates, the N41 band signal is separately output to the antenna 14. In this example, the phase shifter units 1354b, 1354c, and 1354d implement multi-band carrier aggregation, so that the insertion loss of the signal can be reduced, and the quality of signal transmission can be improved.
It should be understood that, in the above example, the N41 frequency band cannot be subjected to carrier aggregation with the B1 frequency band signal and the B3 frequency band signal, because different signal transmission lines need to be subjected to characteristic impedance matching to realize correlated transmission of each signal transmission line due to the capacitance and inductance of the phase shifter unit according to the impedance matching principle of radio frequency. As shown in the smith chart of fig. 5, when the impedance point of the B41 band signal transmission line is at the 50 Ω matching point (m 6 in fig. 5), the B1 band signal transmission line and the B3 band signal transmission line are at the open circuit points (m 4 and m5 in fig. 5), but when one path of the N41 band signal transmission line is added, the original matching of the B1 band signal transmission line, the B3 band signal transmission line and the B41 band signal transmission line is changed, so that the design of matching and combining can be achieved only when two sets of matching are required for the B1 band signal transmission line, the B3 band signal transmission line relative to the B41 band signal transmission line and the N41 band signal transmission line.
Based on this, referring to fig. 6, in another example, tuning devices (1355 a, 1355 b) are respectively connected to n phase shifter elements (1354 c, 1354 d) corresponding to the n third signal channels (133 a, 133 b). Specifically, the tuning device may be a variable capacitor or the like, as long as the characteristic impedance of the frequency band signal transmission line can be adjusted. By configuring the phase shifter elements (1354 c, 1354 d) corresponding to the third signal paths (133 a, 133 b) with variable capacitances or the like, more than two sets of impedance matching can be provided for the transmission line of the third frequency band signal.
Continuing with the above example, after the variable capacitors are added to the signal transmission lines in the B1 band and the B3 band, the variable capacitors are adjusted, so that the signal transmission lines in the B1 band and the B3 band can implement two different sets of impedance matching corresponding to the signal transmission lines in the B41 band and the N41 band. That is to say, by adjusting the variable capacitor, the B41 frequency band or the N41 frequency band can be realized, and carrier aggregation is performed correspondingly with the B1 frequency band and the B3 frequency band, so that the radio frequency front end module 13 shown in fig. 6 can realize a carrier aggregation mode of two combinations, i.e., B41+ B1+ B3 and N41+ B1+ B3.
The rf front-end module 13 shown in fig. 3, 4 and 6 may further include a fourth signal channel 134, where the fourth signal channel 134 is used for transceiving and transmitting a fourth frequency band signal, where the fourth frequency band signal is an rf signal with the same generation as the first frequency band signal network and without overlapping spectrum range. In this case, the switching unit 135 further includes a fifth switch 1357.
In the example of fig. 3, the active end of the fifth switch 1357 is connected to the fixed end of the fourth switch 1351 and the fourth signal channel 134, the fixed end of the fifth switch 1357 is connected to the antenna 14, and the fifth switch 1357 is used for switching between the fourth switch 1351 and the fourth signal channel 134, so as to perform transceiving transmission of any one of the carrier aggregation signal and the fourth frequency band signal through the antenna 14. In this way, the fifth switch 1357 can switch between the carrier aggregation signal and the non-carrier aggregation signal (fourth band signal).
In the examples of fig. 4 and 6, the output terminals of the phase shifter elements are commonly connected to one active terminal of a fifth switch 1357, the other active terminal of the fifth switch 1357 is connected to the fourth signal channel 134, and the fixed terminal of the fifth switch 1357 is connected to the antenna 14, so that the transceiving transmission of any one of the carrier aggregation signal and the fourth frequency band signal through the antenna 14 is realized by using the circuit structure.
The fourth signal path 134 is similar to the fourth signal path 134 shown in fig. 1, and since the operation principle and the implementation of the fourth signal path 134 have been described above, details thereof are not repeated herein.
It should be appreciated that the structure of the first signal path 131, the second signal path 132, the third signal path (133 a, 133 b) and the fourth signal path 134 may be determined according to whether the transmitted Frequency band is in FDD (Frequency-Division Duplex) mode or TDD (Time-Division Duplex) mode.
As shown in fig. 7, when the frequency band signal transceiving transmission in the FDD mode is used, the signal path may specifically include a power amplifier 1361 and a duplexer 1362, where the power amplifier 1361 may be an MMMB PA (multi-mode multi-frequency power amplifier). The power amplifier 1361 is configured to amplify the radio frequency signal output by the transceiver module and transmit the amplified radio frequency signal to the duplexer 1362, and the duplexer 1362 is configured to switch between transmitting and receiving of the radio frequency signal. For example, the signal paths of the B1 band, the B3 band, and the B2 band adopt the structure shown in fig. 7.
As shown in fig. 8, when the frequency band signal transceiving transmission in the TDD mode is used, the signal path may specifically include a power amplifier 1361, a first filter 1363, a second filter 1365, and a switch 1364. The power amplifier 1361 is configured to amplify the radio frequency signal output by the transceiver module and transmit the amplified radio frequency signal to the first filter 1363; the first filter 1363 is configured to filter the radio frequency signal output from the power amplifier 1361 and transmit the filtered radio frequency signal to the switch 1364; the switch 1364 is connected to the first filter 1363 and the second filter 1365, and the switch 1364 is used for switching between transmitting and receiving of the radio frequency signal; the second filter 1365 is configured to filter the received radio frequency signal and transmit the filtered radio frequency signal to the transceiver module. For example, the signal paths of the B41 band and the N41 band have the structure shown in fig. 8.
Those skilled in the art can understand that the transceiver 10 may include other components besides the modules and the rf front-end module 13 shown in the foregoing description, and details are not repeated in this specification. The above-mentioned rf front-end module 13 can be understood by referring to the description in the respective embodiments.
Referring to fig. 9, an embodiment of the present application provides a communication terminal 1, where the communication terminal 1 includes, for example, a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), an in-vehicle computer, an intelligent wearable product, and the like, and the embodiment of the present application does not particularly limit the specific form of the communication terminal 1. The communication terminal 1 of the embodiment of the present application includes a transceiver 10, where the transceiver 10 includes a baseband module 11, a transceiver module 12, and a radio frequency front end module 13. Specifically, the transceiver device 10 may adopt any one of the exemplary structures shown in fig. 1 to 4 and 6. The communication terminal 1 has the same technical effects as the transceiver 10 provided in the foregoing embodiment, and the details are not repeated herein. Those skilled in the art can understand that the communication terminal 1 may include other components besides the transceiver 10, and details are not further described in this specification.
It should be noted that, although the embodiment of the present application is exemplified by a 4G network and a 5G network, a person skilled in the art should recognize that the present application is not limited to be applied in a scenario where different networks of 4G and 5G coexist, and may also be applied in a scenario where different networks of 2G, 3G, and 6G developed in the future coexist, and the present application is not limited to this.
It is to be understood that the above description is not intended to limit the present application, and the present application is not limited to the above examples, and that various changes, modifications, additions and substitutions which may be made by those skilled in the art within the spirit and scope of the present application are also within the scope of the present application.
Claims (8)
1. A radio frequency front end module, comprising:
a first signal channel for transmitting a first frequency band signal;
the second signal channel is used for transmitting a second frequency band signal, wherein the second frequency band signal is a radio frequency signal which is different from the first frequency band signal network in generation and has an overlapped frequency spectrum range;
the switch unit is connected with the first signal channel and the second signal channel and used for switching between the first signal channel and the second signal channel so as to enable any one of the first signal channel and the second signal channel to be communicated with an antenna;
the system also comprises n third signal channels, wherein the n third signal channels are used for correspondingly transmitting n third frequency band signals; the n is an integer and is more than or equal to 1, and the n third frequency band signals are respectively radio frequency signals which are the same as the first frequency band signal network generation and have non-overlapping frequency spectrum ranges;
the switch unit comprises a first switch and a second switch, the first switch is connected with the first signal channel and the n third signal channels, the first frequency band signal and the n third frequency band signals are subjected to carrier aggregation through the first switch, the second switch is connected with the first switch and the second signal channel, and the second switch is used for switching between the first switch and the second signal channel.
2. The rf front-end module of claim 1, wherein the switch unit comprises (n + 2) phase shifter units, the (n + 2) phase shifter units being connected to the first signal path, the second signal path, and the n third signal paths, respectively.
3. The rf front-end module according to claim 2, wherein tuning devices are respectively connected to the n phase shifter elements correspondingly connected to the n third signal paths.
4. The radio frequency front end module of claim 3, wherein the tuning device is a variable capacitance.
5. The rf front-end module of claim 1, further comprising a fourth signal channel, the fourth signal channel being configured to transmit a fourth frequency band signal, wherein the fourth frequency band signal is an rf signal with the same frequency as the first frequency band signal network and non-overlapping frequency spectrum range; the fourth signal channel is connected with the switch unit; the switch unit is further configured to switch to the fourth signal channel, so that the fourth signal channel is communicated with the antenna.
6. The radio frequency front end module according to any of claims 1-5, wherein the first, second, third and fourth signal paths each comprise one of:
the power amplifier is used for amplifying and processing the radio-frequency signal output by the receiving and transmitting module and then transmitting the radio-frequency signal to the duplexer, and the duplexer is used for switching the receiving and transmitting of the radio-frequency signal;
the radio frequency signal processing device comprises a power amplifier, a first filter, a second filter and a change-over switch, wherein the power amplifier is used for amplifying a radio frequency signal output by a transceiver module and then transmitting the radio frequency signal to the first filter; the first filter is used for filtering the radio frequency signal output from the power amplifier and then transmitting the radio frequency signal to the selector switch; the change-over switch is connected with the first filter and the second filter and is used for receiving and transmitting radio-frequency signals; the second filter is used for filtering the received radio frequency signal and then transmitting the radio frequency signal to the transceiver module.
7. A transceiver apparatus, comprising: a baseband module, a transceiver module, the RF front-end module of any one of claims 1 to 6, and an antenna; the baseband module comprises a first baseband module and a second baseband module; the transceiving module comprises a first transceiving module and a second transceiving module; the first baseband module is connected to the radio frequency front end module through the first transceiver module; the second baseband module is connected to the radio frequency front end module through the second transceiver module; the antenna is connected to the radio frequency front end module.
8. A communication terminal, comprising: the transceiver apparatus of claim 7.
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