CN106301461A - A carrier aggregation radio frequency circuit and mobile terminal - Google Patents

Abstract

The invention provides a carrier aggregation radio frequency circuit and a mobile terminal, wherein the radio frequency circuit comprises a radio frequency transceiver module, a power amplification module and a radio frequency front end module, and the power amplification module comprises: the power amplifier comprises a first power amplification submodule, a second power amplification submodule and a filtering submodule; it can be seen that the radio frequency circuit is provided with the filtering submodule in the power amplification module, and the filtering submodule is used for filtering the second frequency band carrier signal to reduce the harmonic power of the second frequency band carrier signal, so that the receiving interference of the harmonic of the second frequency band carrier signal on the first frequency band carrier signal when the carrier aggregation is realized is reduced, and compared with the prior art, the receiving quality of the first frequency band carrier signal can be improved, and the signal receiving performance of the carrier aggregation is further improved.

Description

A carrier aggregation radio frequency circuit and mobile terminal

technical field

The present invention relates to the communication field, in particular to a carrier aggregation radio frequency circuit and a mobile terminal.

Background technique

Carrier Aggregation (Carrier Aggregation, referred to as CA) is a technology to increase transmission bandwidth, which can aggregate 2 to 5 LTE (Long Term Evolution, long-term evolution) component carriers (Component Carrier, referred to as CC) together to achieve a maximum of 100MHz The transmission bandwidth effectively improves the uplink and downlink transmission rates. In carrier aggregation, it includes a primary carrier (PCC) and at least one secondary carrier (SCC).

When using the existing carrier aggregation radio frequency circuit to implement carrier aggregation, since multiple frequency band carriers share one power amplifier (such as a multi-mode multi-frequency power amplifier), when the power amplifier transmits multiple frequency band carrier signals at the same time, a certain P The harmonics of the frequency band carrier signal (such as the second or third harmonic) may be coupled to the signal receiving path of another Q-band carrier through the power amplifier. At this time, it will interfere with the reception of the Q-band carrier signal, making the Q-band carrier signal The reception quality of the carrier is poor, which leads to the low performance of carrier aggregation signal reception; for example, the second or third harmonic of the low-frequency PCC (primary carrier) will be coupled to the receiving path of the medium-high frequency SCC (secondary carrier) through the power amplifier , which will interfere with the reception of the SCC in the middle and high frequency bands, and deteriorate the reception quality of the SCC in the middle and high frequency bands.

Contents of the invention

Embodiments of the present invention provide a carrier aggregation radio frequency circuit and a mobile terminal, which can solve the technical problem that the existing radio frequency circuit causes lower performance of carrier aggregation signal reception.

An embodiment of the present invention provides a radio frequency circuit for carrier aggregation, which includes: a radio frequency transceiver module, a power amplification module, and a radio frequency front-end module. The power amplification module includes: a first power amplification submodule, a second power amplification submodule, and a filter submodule;

The radio frequency transceiver module is configured to send a first frequency band carrier signal to the first power amplification submodule through a first radio frequency path, and send a second frequency band carrier signal to the second power amplification submodule through a second radio frequency path ;

The first power amplification sub-module is configured to amplify the power of the first frequency band carrier signal and send it to the radio frequency front-end module;

The second power amplifying submodule is configured to amplify the power of the second frequency band carrier signal and send it to the filtering submodule;

The filtering sub-module is configured to filter the power-amplified second frequency band carrier signal and send it to the radio frequency front-end module;

The radio frequency front-end module is used to send the amplified carrier signal of the first frequency band and the carrier signal of the second frequency band after filtering to the outside.

In the radio frequency circuit of the present invention, the second power amplifying sub-module is a multi-stage amplifying circuit composed of at least two single-stage amplifying circuits cascaded; the multi-stage amplifying circuit has a signal input terminal and a signal output terminal ;

The signal input terminal is connected to the radio frequency transceiver module, and is used to receive the second frequency band carrier signal sent by the radio frequency transceiver module through the second radio frequency channel;

The signal output end is connected to the filtering sub-module, and is used for sending the power-amplified carrier signal of the second frequency band to the filtering sub-module.

In the radio frequency circuit of the present invention, the second power amplifying sub-module may be a single-stage amplifying circuit, and the single-stage amplifying circuit has a signal input terminal and a signal output terminal;

The signal input terminal is connected to the radio frequency transceiver module, and is used to receive the second frequency band carrier signal sent by the radio frequency transceiver module through the second radio frequency channel;

The signal output end is connected to the filtering sub-module, and is used for sending the power-amplified carrier signal of the second frequency band to the filtering sub-module.

In the radio frequency circuit of the present invention, the single-stage amplifying circuit is formed by cascading multiple amplifiers; the power amplifying module further includes: a power supply circuit;

The power supply circuits are respectively connected to the amplifiers for providing voltages to the amplifiers, and the voltages are between 0.7v and 3.9v;

The amplifier is configured to amplify the input carrier signal of the second frequency band according to the voltage.

In the radio frequency circuit of the present invention, the radio frequency front-end module is also used to receive the external first frequency band carrier signal and the external second frequency band carrier signal, and transmit the external first frequency band carrier signal through the third radio frequency path To the radio frequency transceiver module, sending the external second frequency band carrier signal to the radio frequency transceiver module through a fourth radio frequency channel.

In the radio frequency circuit of the present invention, the radio frequency front-end module includes: an antenna, a radio frequency switch, a first duplexer and a second duplexer;

The first duplexer is respectively connected to the radio frequency transceiver module, the first power amplification sub-module, and the radio frequency switch, and is used to transmit the power amplified first frequency band carrier signal to the radio frequency switch, and adopt the The third radio frequency channel sends the external first frequency band carrier signal transmitted by the radio frequency switch to the radio frequency transceiver module;

The second duplexer is respectively connected to the radio frequency transceiver module, the filter sub-module, and the radio frequency switch, and is used to transmit the filtered carrier signal of the second frequency band to the radio frequency switch, and adopt the fourth radio frequency The channel transmits the external second frequency band carrier signal transmitted by the radio frequency switch to the radio frequency transceiver module;

The radio frequency switch is also connected to the antenna, and is used to transmit the power-amplified first frequency band carrier signal and the filtered second frequency band carrier signal to the outside through the antenna, and to transmit the external first frequency band signal received by the antenna to the outside world. The carrier signal is transmitted to the first duplexer, and the external second carrier signal received by the antenna is transmitted to the second duplexer.

In the radio frequency circuit of the present invention, the power amplification module has a first signal receiving end, a second signal receiving end, a first signal sending end, and a second signal sending end;

The first signal receiving end is connected to the radio frequency transceiver module through the first radio frequency channel, and is connected to the first power amplification sub-module for transmitting the first frequency band carrier signal sent by the radio frequency transceiver module to the first power amplifying sub-module;

The first signal sending end is respectively connected to the first power amplifying sub-module and the first duplexer, and is used to send the power amplified carrier signal of the first frequency band to the first duplexer;

The second signal receiving end is connected to the radio frequency transceiver module through the second radio frequency channel, and is connected to the signal input end of the second power amplification sub-module for transmitting the second signal sent by the radio frequency transceiver module. The frequency band carrier signal is transmitted to the second power amplification sub-module;

The second signal sending end is respectively connected to the filtering sub-module and the second duplexer, and is used to send the second frequency band carrier signal output by the filtering sub-module to the second duplexer.

In the radio frequency circuit of the present invention, it also includes: a filter;

The filters are respectively connected to the first signal sending end and the first duplexer, and are used to filter the first frequency band carrier signal output by the first signal sending end, and filter the first frequency band carrier signal The signal is transmitted to the first duplexer.

In the radio frequency circuit of the present invention, the filter sub-module is a passive filter or a filter matching network.

An embodiment of the present invention also provides a mobile terminal, which includes the above-mentioned radio frequency circuit.

An embodiment of the present invention provides a radio frequency circuit for carrier aggregation. In the radio frequency circuit, a filter sub-module is set in the power amplification module, and the carrier signal of the second frequency band is filtered by the filter sub-module to reduce the harmonic of the carrier signal of the second frequency band. Power, reduce the reception interference of the carrier signal of the second frequency band to the carrier signal of the first frequency band when carrier aggregation is realized, compared with the existing technology, it can improve the receiving quality of the carrier signal of the first frequency band, and then improve the signal of carrier aggregation Receive performance.

Description of drawings

FIG. 1 is a schematic structural diagram of a first carrier aggregation radio frequency circuit provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second type of carrier aggregation radio frequency circuit provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a single-stage amplifier circuit provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a third type of carrier aggregation radio frequency circuit provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a radio frequency circuit of a fourth type of carrier aggregation provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a fifth type of carrier aggregation radio frequency circuit provided by an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a carrier aggregation radio frequency circuit provided by an embodiment of the present invention. The radio frequency circuit of the carrier aggregation includes a radio frequency transceiver module 21, a power amplification module 22, and a radio frequency front-end module 23, specifically as follows;

The power amplifying module 22 includes: a first power amplifying submodule 220, a second power amplifying submodule 221, and a filtering submodule 222;

The radio frequency transceiver module 21 is respectively connected with the first power amplification sub-module 220 and the second power amplification sub-module 221, and is used to send the first frequency band carrier signal to the first power amplification sub-module through the first radio frequency path 25 220, and send the carrier signal of the second frequency band to the second power amplification sub-module 221 through the second radio frequency channel 26;

The first power amplification sub-module 220 is connected to the radio frequency front-end module 23, and is used to amplify the power of the first frequency band carrier signal and send it to the radio frequency front-end module 23;

The second power amplifying submodule 221 is connected to the filtering submodule 222, and is used to amplify the power of the second frequency band carrier signal and send it to the filtering submodule 222;

The filtering sub-module 222 is connected to the radio frequency front-end module 23, and is used to filter the second frequency band carrier signal sent by the second power amplification sub-module 221 and send it to the radio frequency front-end module 23;

The RF front-end module 23 is used to send the amplified first frequency band carrier signal and the filtered second frequency band carrier signal to the outside world, and is also used to receive the external first frequency band carrier signal and the external second frequency band carrier signal, and pass The third radio frequency path 27 sends the carrier signal of the first external frequency band to the radio frequency transceiver module 21 , and sends the carrier signal of the second external frequency band to the radio frequency transceiver module 21 through the fourth radio frequency path 28 .

In this embodiment, the first radio frequency path 25 is used to transmit the carrier signal of the first frequency band to the power amplifier sub-module 220. The first radio frequency path 25 can be a radio frequency line capable of transmitting radio frequency signals. There can be various types of radio frequency lines, for example, It may be composed of radio frequency traces only, or may be composed of radio frequency traces and other radio frequency transmission components, and the composition of radio frequency lines may be set according to actual requirements. Similarly, the second radio frequency path 206 , the third radio frequency path 207 , and the fourth radio frequency path 208 can all be radio frequency lines capable of transmitting radio frequency signals, and the composition of the radio frequency lines can be set according to actual needs.

In this embodiment, the filtering sub-module 222 may be a passive filter, or a filter matching network, or other filters.

In this embodiment, the radio frequency transceiver module 21 may be a radio frequency transceiver chip, and the power amplification module may be a multi-mode multi-frequency power amplifier (MMMB PA) and the like. Wherein, the carrier signal in the first frequency band may be a carrier signal in the medium and high frequency band, that is, a carrier signal whose frequency band falls into the first preset frequency interval, and the carrier signal in the first frequency band may be used as a secondary carrier signal, specifically, it may be a medium and high frequency SCC, such as Auxiliary carrier signals in the B3 frequency band, etc.; the second frequency band carrier signal is a low-frequency carrier signal, that is, a carrier signal whose frequency band falls into the second preset frequency region, and the second frequency band carrier signal can be used as a main carrier signal, specifically low-frequency PCC, such as the main carrier signal of the B8 frequency band, etc.

Optionally, the second power amplifying sub-module 221 in this embodiment may be a multi-stage amplifying circuit, and the multi-stage amplifying circuit may be composed of at least two single-stage amplifying circuits cascaded, and the multi-stage amplifying circuit has a signal input terminal And signal output end, described signal input end is connected with described radio frequency transceiving module 21, is used for receiving the second frequency band carrier signal that radio frequency transceiving module 21 sends;

The signal output terminal is connected to the radio frequency front-end module 23 for sending the carrier signal of the second frequency band amplified by the multi-stage amplifier circuit to the radio frequency front-end module 23 .

For example, as shown in FIG. 2, the second power amplifying sub-module 221 may be a multi-stage amplifying circuit composed of n single-stage amplifying circuits 2210 cascaded, where n is greater than 1 and is a positive integer, wherein the second power amplifying The submodule, that is, the multi-stage amplifying circuit 221 has a signal input terminal 221a and a signal output terminal 221b, and the signal input terminal 221a is connected with the radio frequency transceiver module 21 through the second radio frequency path, and receives the second signal sent by the radio frequency transceiver module through the second radio frequency path. For the frequency band carrier signal, the signal output port 221b is connected to the filter sub-module 222 for sending the second frequency band sub-carrier signal amplified by the multi-stage amplifier circuit 221 (ie after power amplification) to the filter sub-module 222 .

Optionally, the second power amplification sub-module 221 in this embodiment can also be a single-stage amplifying circuit. At this time, the single-stage amplifying circuit has a signal input terminal and a signal output terminal, and the signal input terminal communicates with the radio frequency Module connection, for receiving the second frequency band carrier signal sent by the radio frequency transceiver module through the second radio frequency path, the signal output end is connected with the filter sub-module, for amplifying through the multi-stage amplifier circuit (i.e. power After amplifying), the carrier signal of the second frequency band is sent to the filter sub-module.

In this embodiment, the single-stage amplifying circuit 2210 may be formed by cascading a plurality of amplifiers (PA). For example, as shown in FIG. 1, and is a positive integer.

The radio frequency circuit shown in Fig. 1 and Fig. 2 above is provided with a filter sub-module in the power amplifier module, so that the second frequency band carrier signal can be filtered by the filter sub-module to reduce the harmonic power of the second frequency band carrier signal, reducing the realization of During carrier aggregation, the harmonics of the carrier signal in the second frequency band interfere with the reception of the carrier signal in the first frequency band. Compared with the prior art, the receiving quality of the carrier signal in the first frequency band can be improved, thereby improving the signal receiving performance of carrier aggregation.

In order to further reduce the harmonics of the carrier signal in the second frequency band, this embodiment can increase the voltage of the amplifier (that is, the bias voltage) to improve the linearity of the amplifier. Specifically, the voltage of the amplifier can be between 0.7v and 3.9v ( Existing voltage interval is 0.6-3.7v); For example, with reference to Fig. 4, power amplifying module 22 can also comprise in the present embodiment: power supply circuit 223, and this power supply circuit 223 is connected with the amplifier PA in the single-stage amplifying circuit 2210 respectively, It is used to provide voltage to the amplifier, wherein the voltage is between 0.7v and 3.9v; at this time, the amplifier is used to amplify the input carrier signal of the second frequency band according to the voltage.

In this embodiment, the radio frequency front-end module 23 is used to realize the transmission and reception of the carrier signal of the first frequency band and the carrier signal of the second frequency band. The radio frequency front-end module 23 may be composed of a radio frequency switch, a duplexer and an antenna. Specifically, refer to FIG. 5 , the radio frequency front-end module 23 may include: an antenna 230, a radio frequency switch 231, a first duplexer 232 and a second duplexer 233;

The first duplexer 232 is respectively connected to the radio frequency transceiver module 21, the first power amplifying sub-module 220, and the radio frequency switch 231, and is used to transmit the first frequency band carrier wave transmitted by the first power amplifying sub-module 220 The signal (i.e. the first frequency band signal after the power amplification) is transmitted to the radio frequency switch 231, and the third radio frequency path 27 is used to send the external first frequency band carrier signal transmitted by the radio frequency switch 231 to the radio frequency transceiver module 21; refer to FIG. 5 , the signal transmitting end 232a of the first duplexer 232 is connected to the radio frequency transceiver module 21 through the third radio frequency path 27, the signal input end 232b of the first duplexer 232 is connected to the first power amplifier sub-module 220, the second A signal transceiver end 232c of a duplexer 232 is connected to the radio frequency switch 231;

The second duplexer 233 is respectively connected with the radio frequency transceiver module 21, the filter sub-module 222, and the radio frequency switch 231, and is used to filter the second frequency band carrier signal (i.e. filter) sent by the filter sub-module 222. The second frequency band carrier signal) is transmitted to the radio frequency switch 231, and the external second frequency band carrier signal transmitted by the radio frequency switch 231 is transmitted to the radio frequency transceiver module 21 by using the fourth radio frequency path 28; with reference to FIG. 5 , the second The signal input end 233a of the duplexer 233 is connected with the filtering sub-module 222, the signal transmitting end 233b of the second duplexer 233 is connected with the radio frequency transceiver module 21 through the fourth radio frequency path 28, and the signal transceiver end of the second duplexer 233 233c is connected to the radio frequency switch 231;

The radio frequency switch 231 is also connected to the antenna 230, and is used to transmit the power-amplified carrier signal of the first frequency band and the carrier signal of the second frequency band after filtering to the outside through the antenna 230, and receive the carrier signal of the second frequency band by the antenna 230 The external first carrier signal received by the antenna 230 is transmitted to the first duplexer 232 , and the external second carrier signal received by the antenna 230 is transmitted to the second duplexer 233 .

Referring to FIG. 5, the power amplification module 22 also has a first signal receiving end 22a, a second signal receiving end 22b, a first signal sending end 22c, and a second signal sending end 22d;

The first signal receiving end 22a is connected to the radio frequency transceiver module 21 through the first radio frequency channel, and is connected to the first power amplification sub-module 220, for transmitting the first signal transmitted by the radio frequency transceiver module 21. The frequency band carrier signal is transmitted to the first power amplification sub-module 220;

The first signal sending end 22c is respectively connected with the first power amplifying sub-module 220 and the first duplexer 232, and is used to output the first frequency band carrier signal (i.e. after power amplifying) from the first power amplifying sub-module 220. The first frequency band carrier signal) is sent to the first duplexer 232;

The second signal receiving end 22b is connected to the radio frequency transceiver module 21 through the second radio frequency channel, and is connected to the signal input end of the second power amplification sub-module 221, for connecting the radio frequency transceiver module 21 The transmitted second frequency band carrier signal (ie, the filtered second frequency band carrier signal) is transmitted to the second power amplification sub-module 221;

The second signal sending end 22d is respectively connected to the filtering sub-module 222 and the second duplexer 233 for sending the second frequency band carrier signal output by the filtering sub-module 222 to the second duplexer 233 .

In this embodiment, a filter can also be set on the transmission path of the first frequency band carrier signal. For example, referring to FIG. The first duplexer 232 (signal input end 232b of the first duplexer 232) is connected to filter the first frequency band carrier signal output by the first signal sending end 22c, and filter the first frequency band The carrier signal is transmitted to the first duplexer 232 .

Wherein, the filter 24 may be a passive filter, or a filter matching network, or other filters.

In the radio frequency circuit provided by the embodiment of the present invention, a filter sub-module is set in the power amplification module, and the second frequency band carrier signal is filtered through the filter sub-module to reduce the harmonic power of the second frequency band carrier signal, reducing the second frequency when carrier aggregation is implemented. The harmonics of the carrier signal in the frequency band interfere with the reception of the carrier signal in the first frequency band, and the radio frequency circuit can also improve the linearity of the amplifier by increasing the bias voltage of the amplifier in the power amplifier module, thereby reducing the harmonics of the carrier signal in the second frequency band. Wave output, suppress harmonic interference, improve the signal receiving performance of carrier aggregation, and improve the download rate when users use a specific frequency band combined CA network.

In addition, the radio frequency circuit provided by the embodiment of the present invention can also add a filter to attenuate the harmonics of the carrier signal in the second frequency band, further reduce the receiving interference of the carrier signal in the second frequency band to the carrier signal in the first frequency band, and further improve the carrier frequency. Aggregated signal reception performance.

The embodiment of the present invention also provides a mobile terminal, the mobile terminal includes the above radio frequency circuit for carrier aggregation, and the radio frequency circuit includes a radio frequency transceiver module, a power amplification module and a radio frequency front-end module;

The power amplifying module includes: a first power amplifying submodule, a second power amplifying submodule, and a filtering submodule;

The radio frequency transceiver module is connected to the first power amplification sub-module and the second power amplification sub-module respectively, and is used to send a first frequency band carrier signal to the first power amplification sub-module through a first radio frequency path, and sending a second frequency band carrier signal to the second power amplification submodule through a second radio frequency path;

The first power amplification sub-module is connected to the radio frequency front-end module, and is used to amplify the power of the first frequency band carrier signal and send it to the radio frequency front-end module;

The second power amplifying submodule is connected to the filtering submodule, and is used to amplify the power of the second frequency band carrier signal and send it to the filtering submodule;

The filtering sub-module is connected to the radio frequency front-end module, and is used to filter the second frequency band carrier signal sent by the second power amplification sub-module and send it to the radio frequency front-end module;

The RF front-end module is used to send the carrier signal of the first frequency band and the carrier signal of the second frequency band to the outside, and receive the carrier signal of the first frequency band and the carrier signal of the second frequency band from the outside, and transmit the carrier signal of the second frequency band to the outside through the third radio frequency channel. The first frequency band carrier signal is sent to the radio frequency transceiver module, and the second external frequency band carrier signal is sent to the radio frequency transceiver module through the fourth radio frequency path.

In the mobile terminal provided by the embodiment of the present invention, a filter sub-module is set in the power amplification module, and the filter sub-module performs filtering processing on the carrier signal of the second frequency band to reduce the harmonic power of the carrier signal of the second frequency band, thereby reducing the second frequency when carrier aggregation is implemented. The harmonics of the carrier signal in the frequency band interfere with the reception of the carrier signal in the first frequency band, and the radio frequency circuit can also improve the linearity of the amplifier by increasing the bias voltage of the amplifier in the power amplifier module, thereby reducing the harmonics of the carrier signal in the second frequency band. Wave output, suppress harmonic interference, improve the signal receiving performance of carrier aggregation, and improve the download rate when users use a specific frequency band combined CA network.

In summary, although the present invention has been disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present invention, and those of ordinary skill in the art can make various modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope defined in the claims.

Claims (10)

1. A radio frequency circuit for carrier aggregation, comprising: a radio frequency transceiver module, a power amplification module, and a radio frequency front-end module, wherein the power amplification module includes: a first power amplification submodule, a second power amplification submodule, and a filter submodule; The radio frequency transceiver module is configured to send a first frequency band carrier signal to the first power amplification submodule through a first radio frequency path, and send a second frequency band carrier signal to the second power amplification submodule through a second radio frequency path ; The first power amplification sub-module is configured to amplify the power of the first frequency band carrier signal and send it to the radio frequency front-end module; The second power amplifying submodule is configured to amplify the power of the second frequency band carrier signal and send it to the filtering submodule; The filtering sub-module is configured to filter the power-amplified second frequency band carrier signal and send it to the radio frequency front-end module; The radio frequency front-end module is used to send the amplified carrier signal of the first frequency band and the carrier signal of the second frequency band after filtering to the outside. 2. The radio frequency circuit according to claim 1, wherein the second power amplifier sub-module is a multistage amplifier circuit composed of at least two single-stage amplifier circuits cascaded; the multistage amplifier circuit has a signal input and signal output; The signal input terminal is connected to the radio frequency transceiver module, and is used to receive the second frequency band carrier signal sent by the radio frequency transceiver module through the second radio frequency channel; The signal output end is connected to the filtering sub-module, and is used for sending the power-amplified carrier signal of the second frequency band to the filtering sub-module. 3. The radio frequency circuit according to claim 1, wherein the second power amplifier sub-module can be a single-stage amplifier circuit, and the single-stage amplifier circuit has a signal input terminal and a signal output terminal; The signal input terminal is connected to the radio frequency transceiver module, and is used to receive the second frequency band carrier signal sent by the radio frequency transceiver module through the second radio frequency channel; The signal output end is connected to the filtering sub-module, and is used for sending the power-amplified carrier signal of the second frequency band to the filtering sub-module. 4. The radio frequency circuit according to claim 2 or 3, wherein the single-stage amplifying circuit is formed by cascading a plurality of amplifiers; the power amplifying module further comprises: a power supply circuit; The power supply circuits are respectively connected to the amplifiers for providing voltages to the amplifiers, and the voltages are between 0.7v and 3.9v; The amplifier is configured to amplify the input carrier signal of the second frequency band according to the voltage. 5. The radio frequency circuit according to claim 1, wherein the radio frequency front-end module is also used to receive an external first frequency band carrier signal and an external second frequency band carrier signal, and transmit the external signal through a third radio frequency path. The first frequency band carrier signal is sent to the radio frequency transceiver module, and the second external frequency band carrier signal is sent to the radio frequency transceiver module through a fourth radio frequency path. 6. The radio frequency circuit according to claim 5, wherein the radio frequency front-end module comprises: an antenna, a radio frequency switch, a first duplexer and a second duplexer; The first duplexer is respectively connected to the radio frequency transceiver module, the first power amplification sub-module, and the radio frequency switch, and is used to transmit the power amplified first frequency band carrier signal to the radio frequency switch, and adopt the The third radio frequency channel sends the external first frequency band carrier signal transmitted by the radio frequency switch to the radio frequency transceiver module; The second duplexer is respectively connected to the radio frequency transceiver module, the filter sub-module, and the radio frequency switch, and is used to transmit the filtered carrier signal of the second frequency band to the radio frequency switch, and adopt the fourth radio frequency The channel transmits the external second frequency band carrier signal transmitted by the radio frequency switch to the radio frequency transceiver module; The radio frequency switch is also connected to the antenna, and is used to transmit the power-amplified first frequency band carrier signal and the filtered second frequency band carrier signal to the outside through the antenna, and to transmit the external first frequency band signal received by the antenna to the outside world. The carrier signal is transmitted to the first duplexer, and the external second carrier signal received by the antenna is transmitted to the second duplexer. 7. The radio frequency circuit according to claim 5, wherein the power amplification module has a first signal receiving end, a second signal receiving end, a first signal sending end and a second signal sending end; The first signal receiving end is connected to the radio frequency transceiver module through the first radio frequency channel, and is connected to the first power amplification sub-module for transmitting the first frequency band carrier signal sent by the radio frequency transceiver module to the first power amplifying sub-module; The first signal sending end is respectively connected to the first power amplifying sub-module and the first duplexer, and is used to send the power amplified carrier signal of the first frequency band to the first duplexer; The second signal receiving end is connected to the radio frequency transceiver module through the second radio frequency channel, and is connected to the signal input end of the second power amplification sub-module for transmitting the second signal sent by the radio frequency transceiver module. The frequency band carrier signal is transmitted to the second power amplification sub-module; The second signal sending end is respectively connected with the filtering sub-module and the second duplexer, and is used for sending the filtered carrier signal of the second frequency band to the second duplexer. 8. The radio frequency circuit according to claim 7, further comprising: a filter; The filters are respectively connected to the first signal sending end and the first duplexer, and are used to filter the first frequency band carrier signal output by the first signal sending end, and filter the first frequency band carrier signal The signal is transmitted to the first duplexer. 9. The radio frequency circuit according to claim 1, wherein the filter sub-module is a passive filter or a filter matching network. 10. A mobile terminal, comprising the radio frequency circuit for carrier aggregation according to any one of claims 1-9.