CN111478709A - Carrier aggregation circuit and mobile terminal - Google Patents
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- H—ELECTRICITY
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- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—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
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Abstract
The application discloses a carrier aggregation circuit and a mobile terminal. According to the method, the frequency band signals belonging to three different frequency intervals are divided, and the independent antenna design is carried out on the frequency band signal of a third frequency interval; allocating one of two different frequency band signals belonging to the first frequency interval to the single antenna for carrier frequency transmission; and respectively using an antenna switch for the other frequency band signal and the frequency band signal belonging to the second frequency interval, and then using the same frequency divider for same-antenna transmission. When the carrier aggregation is realized, the quadruplex device is saved, the cost is saved, the insertion loss of the radio frequency front end is reduced, and the structural design of the antenna is optimized.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a carrier aggregation circuit and a mobile terminal.
Background
In current electronic products, in order to pursue higher, faster and smoother network speed experience, a long Term Evolution (L ong Term Evolution, L TE for short) Carrier Aggregation (CA for short) technology is often adopted in radio frequency circuit design.
In the circuit architecture design of the CA, in order to realize carrier aggregation between frequency bands in different frequency Band intervals, a front end frequency division design is performed on a front end of a radio frequency circuit by a frequency divider (Diplexer, DIP), a Duplexer (DUP), a Triplexer (TPX), a Quadplexer (QPX) or a Separate Antenna (Separate Antenna), then circuit design and signal transmission are performed by an Antenna Switch (Antenna Switch) shared Antenna, generally, if an Ultra-High Band (UHB) and a High/medium/low frequency Band (HB/MB/L B) are different, a CA circuit design (539-2) is performed, generally, if a frequency Divider (DIP) is used, if a High-medium frequency Band and a low frequency Band (HB/MB/L B) are different, a High frequency Band (MH-MH) and a low frequency Band (UHP-M) are different, generally, a frequency Divider (DIP) and a low frequency Band (QPX-UHM) are different, and if a frequency divider (QPX-High frequency Band and a low frequency Band (UHM-MH-M) and a frequency divider (UFM) are different from a High frequency Band (UHP-medium frequency Band).
Referring to fig. 1, an architecture diagram of an embodiment of a conventional CA design circuit includes a Transceiver (Transceiver)11, a Power Amplifier module (PA (s))12, a first duplexer (DUP1)131, a second duplexer (DUP2)132, a third duplexer (DUP3)133, a first antenna switch (ASM1)141, a second antenna switch (ASM2)142, a Divider (DIP)15, and an Antenna (ANT)16, wherein the Power Amplifier module 12 includes one or more Power Amplifiers (PA) (PA (s)) representing one or more PAs, TX representing transmission, RX representing reception, a bidirectional arrow representing transmission-reception common path (TRX), HB representing high band, MB representing medium band, and L B representing low band.
The transmitting port (TX) of the transceiver 11 is connected to the power amplifier module 12, and the receiving ports (RX1-RX3) thereof are respectively connected to the first duplexer 131, the second duplexer 132, and the third duplexer 133, and the transceiver 11 is configured to transmit signals to each power amplifier in the power amplifier module 12 and respectively receive HB, MB, and L B signals transmitted by the corresponding duplexers.
Each power amplifier in the power amplifier module 12 is further connected to the first duplexer 131, the second duplexer 132, and the third duplexer 133, respectively; each power amplifier is configured to power-amplify a signal transmitted by the transceiver 11 and provide the amplified signal to a corresponding duplexer.
In practical applications, the transmitting signal of L B passes through DUP1, ASM1 and DIP to reach ANT, the transmitting signal of MB passes through DUP2, ASM1 and DIP to reach ANT, and the transmitting signal of HB passes through DUP3, ASM2 and DIP to reach ANT.
In this embodiment, the frequency divider 15 divides L B, MB, and HB, so as to implement CA combination between different frequency bands of two frequency intervals L B + MB and L B + HB.
When two different frequency bands belonging to MB or L B exist in a CA combination, it is necessary to perform a circuit design by dividing two frequency bands belonging to one frequency interval (the same L B interval or MB interval) by using a Quadplexer (QPX).
Referring to fig. 2A-2B, fig. 2A is a schematic diagram of an architecture of another embodiment of a conventional CA design circuit, and fig. 2B is a schematic diagram of an embodiment of a quadplexer.
As shown in FIG. 2A, the CA in the present embodiment adopts the design of CA combination of B1+ B3+ B8, B3 and B1 belong to MB, B8 belongs to L B, namely, two different frequency bands belong to MB interval, the difference from the embodiment shown in FIG. 1 is that in the present embodiment, the CA circuit design is carried out on the different frequency bands (B1 and B3) in the two intermediate frequency bands, a Quadrupler (QPX)232 is used for frequency division between the frequency bands, the first duplexer 131 is connected with the second antenna switch 142, and the Quadrupler (QPX)232 and the third duplexer 133 are connected with the first antenna switch 141.
In practical application, the emission signal of B1 in MB passes through QPX, ASM1 and DIP to ANT; the transmit signal of B3 in MB passes through QPX, ASM1, and DIP to ANT.
In the B1+ B3 quadplexer shown in fig. 2B, port 3 is a common port, ports 1 and 2 are transmitting ports (Tx) of B1 and B3, respectively, and ports 4 and 5 are transmitting ports (Rx) of B1 and B3, respectively. The four-frequency-division functions of two transmission and two reception of B1 and B3 are realized by using a B1+ B3 quadplexer.
However, the cost of the quadruplex is high, the insertion loss is large, the cost of adding one QPX is dozens of times of the cost of adding one FPC antenna, and when CA combinations among multiple frequency bands exist in one electronic product, a multistage frequency divider or a three-frequency divider must be used to divide L B, MB and HB to different ASMs, which also causes the cost to be increased and the insertion loss of the radio frequency front end is large.
Disclosure of Invention
The application aims to solve the problems in the prior art, and the carrier aggregation circuit and the mobile terminal are provided, so that the quadruplex device can be saved, the cost can be saved, the insertion loss of the radio frequency front end can be reduced, and the structural design of the antenna can be optimized.
To achieve the above object, an embodiment of the present application provides a carrier aggregation circuit, including: a transceiver; the first antenna is used for receiving an external first frequency band signal and an external third frequency band signal; the first signal processing unit is used for acquiring the external first frequency band signal and the external third frequency band signal and outputting the external first frequency band signal and the external third frequency band signal to the transceiver respectively; the second antenna is used for receiving an external second frequency band signal and an external fourth frequency band signal; the second signal processing unit is used for acquiring the external second frequency band signal and the external fourth frequency band signal and outputting the external second frequency band signal and the external fourth frequency band signal to the transceiver respectively; the external second frequency band signal and the external first frequency band signal belong to a first frequency interval, the external third frequency band signal belongs to a second frequency interval, and the external fourth frequency band signal belongs to a third frequency interval; the transceiver is configured to acquire the external first frequency band signal, the external second frequency band signal, the external third frequency band signal, and the external fourth frequency band signal, and implement inter-band carrier aggregation of the first, second, and third frequency band signals by using the external first frequency band signal, the external third frequency band signal, and the external second frequency band signal.
In order to achieve the above object of the present application, an embodiment of the present application further provides a mobile terminal, including: the carrier aggregation circuit described herein.
The method has the advantages that the method carries out independent antenna design on frequency band signals belonging to three different frequency intervals in a bisection mode through the frequency band signals belonging to a third frequency interval (WHB or HB), one of the two different frequency band signals belonging to a first frequency interval (L B or MB) is distributed to the independent antenna for carrier frequency transmission, the other frequency band signal and the frequency band signal belonging to a second frequency interval are respectively transmitted on the same antenna through the same frequency divider after an antenna switch is used.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram of an embodiment of a conventional CA design circuit;
FIG. 2A is a schematic diagram of another embodiment of a conventional CA design circuit;
FIG. 2B is a schematic diagram of an embodiment of a quadplexer;
fig. 3 is a schematic diagram of a carrier aggregation circuit according to the present application;
fig. 4 is a schematic diagram of a first embodiment of a carrier aggregation circuit of the present application;
fig. 5 is a diagram of a second embodiment of a carrier aggregation circuit of the present application;
fig. 6 is a schematic architecture diagram of a mobile terminal according to the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The terms "first," "second," "third," and the like in the description and in the claims of the present application, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover a non-exclusive inclusion. The directional phrases referred to in this application, for example: up, down, left, right, front, rear, inner, outer, lateral, etc., are simply directions with reference to the drawings.
Throughout the description of the present application, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
For convenience of explanation, the following provides a brief explanation of some terms of art to which this application relates.
Ultra-High Band (UHB): generally, the operating frequency is a radio frequency band operating above 3GHZ, and the frequency band interval includes a plurality of frequency bands.
High Band (HB): generally, the radio frequency band with the working frequency of 2300 plus 2700MHz is used, and the frequency band interval comprises a plurality of frequency bands.
Mid Band (MB): generally refers to a radio frequency band with an operating frequency of 1250-2250MHz, and the band interval includes a plurality of frequency bands.
The low frequency Band (L ow Band, L B) generally refers to the radio frequency Band with the operating frequency of 700-1000MHz, and the Band interval includes a plurality of frequency bands.
Band X (Band X, Bx): a band-specific bandwidth within the band interval is defined. For example: the frequency band 1(B1) defines the bandwidth of the uplink 1920-1980MHZ frequency band and the bandwidth of the downlink 2110-2170MHZ frequency band in the middle frequency band interval; the band 2(B2) defines the bandwidth of uplink 1850 and 1910MHZ bands and the bandwidth of downlink 1930 and 1990MHZ bands in the middle band interval; the band 5(B5) defines the bandwidth of the uplink 824-849MHZ band and the bandwidth of the downlink 869-894MHZ band within the low band segment. Namely, both B1 and B2 belong to the MB frequency band interval, and the operating mode is frequency division multiplexing (FDD).
Carrier Aggregation (CA): multiple carriers are combined together to increase the signal bandwidth and thereby increase the transmission bit rate.
Frequency Dividers (DIPs) are commonly used to divide frequencies between two different frequency bands, such as by dividing HB and MB by two, or by dividing MB and L B by two, etc.
Duplexer (Duplexer, DUP for short): usually as a frequency division for transmission and reception in the same frequency band.
Triplexer (TPX for short): the design is usually used for realizing the three-frequency-band multiplexing, and the three-frequency-band multiplexing function is realized on one device.
Quadplexer (QPX for short): the method is generally used for multiplexing the transmission and the reception of two frequency bands on one device, and a common path realizes the transmission and the reception of the two frequency bands.
The core of the application is to provide a carrier aggregation circuit and a mobile terminal, wherein the carrier aggregation circuit and the mobile terminal are realized by independently designing an antenna on a frequency Band area where the Band A is positioned, simultaneously distributing the Band X/Band Y to the antenna of the Band A for frequency transmission, and respectively using an antenna switch for the Band Y/Band X and the Band B and then using the same frequency divider for same-antenna transmission.
Referring to fig. 3, an architecture of a carrier aggregation circuit according to the present application is shown. The carrier aggregation circuit includes: a first antenna 31, a first signal processing unit 32, a second antenna 33, a second signal processing unit 34 and a transceiver 35.
The first antenna 31 is configured to receive an external first frequency Band signal Band Y and an external third frequency Band signal Band B. Wherein, the Band Y and the Band B belong to different frequency intervals. Specifically, when receiving external Band Y and Band B frequency Band signals from the network side, the first antenna 31 outputs the external Band Y and Band B frequency Band signals to the first signal processing unit 32, and the first signal processing unit 32 performs frequency division and other processing on the external Band Y and Band B frequency Band signals and forwards the signals to the transceiver 35.
The first signal processing unit 32 is configured to obtain the external first frequency Band signal Band Y and the external third frequency Band signal Band B, and output the external first frequency Band signal Band Y and the external third frequency Band signal Band B to the transceiver 35 respectively. Specifically, the first signal processing unit 32 receives the external signal transmitted by the first antenna 31, performs frequency division, and outputs the divided Band Y and Band B frequency Band signals to corresponding receiving ports (RX) of the transceiver 35.
The second antenna 33 is configured to receive an external second frequency Band signal Band X and an external fourth frequency Band signal Band a. And the external second frequency Band signal Band X and the external first frequency Band signal Band Y belong to the same frequency interval. Specifically, when receiving external Band X and Band a frequency Band signals from the network side, the second antenna 33 outputs the external Band X and Band a frequency Band signals to the second signal processing unit 34, and the second signal processing unit 34 performs frequency division and other processing on the external Band X and Band a frequency Band signals and forwards the signals to the transceiver 35.
The second signal processing unit 34 is configured to obtain the external second frequency Band signal Band X and the external fourth frequency Band signal Band a, and output the external second frequency Band signal Band X and the external fourth frequency Band signal Band a to the transceiver 35 respectively. Specifically, the second signal processing unit 34 receives the external signal transmitted by the second antenna 33, performs frequency division, and outputs the divided Band X and Band a frequency Band signals to corresponding receiving ports (RX) of the transceiver 35.
The transceiver 35 is configured to obtain the external first frequency Band signal Band Y, the external second frequency Band signal Band X, the external third frequency Band signal Band B, and the external fourth frequency Band signal Band a, and implement the first, second, and third frequency Band signal inter-Band CA by using the external first frequency Band signal Band Y, the external third frequency Band signal Band B, and the external second frequency Band signal Band X. The transceiver 35 may also use the external first frequency Band signal Band Y and the external third frequency Band signal Band B output by the first signal processing unit 32, and the external second frequency Band signal Band X and the external fourth frequency Band signal Band a output by the second signal processing unit 34 to implement the inter-Band CA of the first frequency Band signal, the second frequency Band signal, the third frequency Band signal and the fourth frequency Band signal.
Specifically, the third frequency interval is a high-frequency Band frequency interval (HB) or an ultra-high frequency Band frequency interval (UHB), and the second antenna 33 is a high-frequency antenna, when the second frequency interval is a middle-frequency Band frequency interval (MB), the first frequency interval is a low-frequency Band frequency interval (L B), or when the second frequency interval is a low-frequency Band frequency interval (L B), and the first frequency interval is a middle-frequency Band frequency interval (MB), that is, Band X and Band Y belong to L B or MB, and Band a and Band B belong to another two frequency intervals different from the frequency intervals to which Band X and Band Y belong.
In the implementation, the transceiver 35 has a receiving port (RX1-RX4) and a transmitting port (TX) for receiving and transmitting signals, and can acquire signals received by or to be transmitted by each antenna. In this application, all the signals received by the first antenna 31 and the second antenna 33, including the external Band X, Band Y, Band a, Band B frequency Band signals, are transmitted to the corresponding receiving port of the transceiver 35, and then the transceiver 35 hands on the subsequent processing procedure, thereby implementing inter-Band aggregation of Band X + Band Y + Band B or Band X + Band Y + Band B + Band a. The application focuses on the process of transmitting the external Band X, Band Y, Band a, and Band B frequency Band signals to the transceiver 35, and for the specific processing procedure for implementing inter-Band CA, reference may be made to the prior art, which is not described herein.
In a further embodiment, the circuit further comprises: a Power Amplifier module 36, wherein the Power Amplifier module 36 includes at least one Power Amplifier (PA). One end of the power amplifier module 36 is connected to the transceiver 35, and the other end is connected to the first signal processing unit 32 and the second signal processing unit 34, respectively. Each power amplifier in the power amplifier module 36 is configured to amplify the power of the signal transmitted by the transceiver 35 and provide the amplified signal to a corresponding signal processing unit.
In a further embodiment, from the perspective of practical application, the first antenna 31 may also be used to transmit the internal first Band signal Band Y and the internal third Band signal Band B from the corresponding transmission ports of the transceiver 35. The second antenna 33 may also be used to transmit internal second Band signals Band X and internal fourth Band signals Band a from respective transmit ports (TX) of the transceiver 35.
According to the method, the frequency band signals belonging to three different frequency intervals are divided, a single antenna design is carried out on the frequency band signals belonging to a third frequency interval (WHB or HB), one of two different frequency band signals belonging to a first frequency interval (L B or MB) is distributed to the single antenna for carrier frequency transmission, the other frequency band signal and the frequency band signal belonging to a second frequency interval are respectively transmitted by using the same frequency divider after using an antenna switch.
Please refer to fig. 3 and fig. 4, wherein fig. 4 is a schematic diagram of a carrier aggregation circuit according to a first embodiment of the present application. In the figure, RX represents receiving, TX represents transmitting, and a bidirectional arrow represents transmitting and receiving same-path (TRX); PA(s) represent PA series combinations, which may be n discrete PAs when designed for uplink CA.
In this embodiment, Band X and Band Y belong to two different frequency bands in the same frequency range (L B or MB), for example, they belong to L B, Band a and Band B belong to two different frequency bands in another two different frequency ranges, for example, Band a belongs to HB and Band B belongs to MB, wherein there is no CA combination between Band X and Band a, there is CA combination between Band Y and Band B, and there is CA combination of Band X + Band Y + Band B, the first antenna (ANT1)34 is responsible for transceiving Band Y and Band B frequency Band signals, and the second antenna (ANT2)35 is responsible for transceiving Band X and Band AB3 frequency Band signals.
In this embodiment, the first signal processing unit 32 includes: a first frequency divider (DIP1)321, a first duplexer (DUP1)322, a first antenna switch (ASM1)323, a second duplexer (DUP2)324, and a second antenna switch (ASM2) 325.
The first frequency divider 321 is connected to the first antenna 31, and the first frequency divider 321 is configured to divide the frequency of an external first frequency Band signal Band Y and an external third frequency Band signal Band B. Specifically, the first frequency divider 321 identifies and divides the frequency of the external signal according to the frequency range of the Band Y and Band B frequency signals to obtain Band Y and Band B.
The first duplexer 322 is connected to the first frequency divider 321 through the first antenna switch 323, and is configured to receive the external first frequency Band signal Band Y and output the external first frequency Band signal Band Y to the transceiver 35. The first duplexer 322, while distinguishing between transmitting and receiving, is further configured to filter frequencies associated with Band Y, thereby ensuring that the signal output from the first duplexer 322 to the receive port of the transceiver 35 is a Band Y signal.
The second duplexer 324 is connected to the first frequency divider 321 through the second antenna switch 325, and is configured to receive the external first frequency Band signal Band B and output the external first frequency Band signal Band B to the transceiver 35. The second duplexer 324, while distinguishing between transmitting and receiving, is further configured to filter frequencies associated with Band B, thereby ensuring that the signal output from the second duplexer 324 to the receive port of the transceiver 35 is a Band B signal.
The first antenna 31 may also be used to transmit internal Band Y, Band B frequency Band signals. When transmitting signals, the corresponding transmitting ports of the transceiver 35 transmit internal Band Y and Band B frequency Band signals; the corresponding power amplifier in the power amplifier module 36 performs the corresponding power amplification; whether to transmit or receive is distinguished by a duplexer; other more specific details may be found in the prior art. A transmission signal of Band Y (namely, an internal Band Y frequency Band signal) passes through corresponding power amplifiers in pa(s), DUP1, ASM1 and DIP1 to ANT 1; the transmit signal of Band B (i.e., the internal Band B Band signal) passes through the corresponding power amplifiers in pa(s), DUP2, ASM2, and DIP1 to ANT 1.
In this embodiment, the second signal processing unit 34 includes: a third duplexer (DUP3)341, a fourth duplexer (DUP4)342, and a third antenna switch (ASM3) 343.
The third duplexer 341 is connected to the second antenna 33 through the third antenna switch 343, and is configured to receive the external second frequency Band signal Band X, and output the external second frequency Band signal Band X to the transceiver 35. The third duplexer 341, while distinguishing between transmitting and receiving, is further configured to filter the frequency associated with Band X, thereby ensuring that the signal output from the third duplexer 341 to the receiving port of the transceiver 35 is a Band X signal.
The fourth duplexer 342 is connected to the second antenna 33 through the third antenna switch 343, and is configured to receive the external fourth frequency Band signal Band a and output the external fourth frequency Band signal Band a to the transceiver 35. The fourth duplexer 342, while distinguishing between transmitting and receiving, is further configured to filter frequencies associated with Band a, thereby ensuring that the signal output from the fourth duplexer 342 to the receiving port of the transceiver 35 is a Band a signal.
The second antenna 33 may also be used to transmit internal Band X, Band a Band signals. When transmitting signals, the corresponding transmitting ports of the transceiver 35 transmit internal Band X and Band a frequency Band signals; the corresponding power amplifier in the power amplifier module 36 performs the corresponding power amplification; whether to transmit or receive is distinguished by a duplexer; other more specific details may be found in the prior art. A transmission signal of Band X (i.e. an internal Band X frequency Band signal) passes through corresponding power amplifiers in pa(s), DUP3 and ASM3 to ANT 2;
the transmit signal of Band a (i.e., the internal Band a Band signal) passes through the corresponding power amplifiers in pa(s), DUP4, and ASM3 to ANT 2.
The transceiver 35 acquires signals received by the first antenna 31 and the second antenna 33, including external Band X, Band Y, Band a, and Band B frequency Band signals, and implements Band X + Band Y + Band B inter-Band CA using the Band Y, Band B, and Band X frequency Band signals. The specific processing procedure of inter-band CA can be referred to the prior art, and is not described herein.
In the embodiment, a single antenna in a frequency Band area where Band A is located is designed, and Band X of Band X and Band Y belonging to the same frequency interval is simultaneously allocated to the antenna of Band A for frequency transmission; and respectively using an antenna switch for Band Y and Band B and then using the same frequency divider for same-antenna transmission. When the carrier aggregation is realized, the quadruplex device is saved, the cost is saved, the insertion loss of the radio frequency front end is reduced, and the structural design of the antenna is optimized.
Please refer to fig. 3 and fig. 5, wherein fig. 5 is a schematic diagram of a carrier aggregation circuit according to a second embodiment of the present application. In the figure, RX represents receiving, TX represents transmitting, and a bidirectional arrow represents transmitting and receiving same-path (TRX); PA(s) represent PA series combinations, which may be n discrete PAs when designed for uplink CA.
The difference from the embodiment shown in fig. 4 is that in this embodiment, a CA combination is also present between Band X and Band a. A second frequency divider (DIP2)344 is additionally arranged in the corresponding second signal processing unit 34 a; the third duplexer 341 accesses the second antenna 33 through the second frequency divider 344; the fourth duplexer 342 accesses the second antenna 33 through the third antenna switch 343 and the second frequency divider 344.
Specifically, the second frequency divider 344 is connected to the second antenna 33, and the second frequency divider 344 is configured to divide the frequency of the external second frequency Band signal Band X and the frequency of the external fourth frequency Band signal Band a. Specifically, the second frequency divider 344 performs identification and frequency division on the external signal according to the frequency range of the Band X and Band a frequency Band signals, so as to obtain Band X and Band a. While the third antenna switch 343 is switched in only the transmission path of Band a.
The transceiver 35 acquires signals received by the first antenna 31 and the second antenna 33, including external Band X, Band Y, Band a, Band B frequency Band signals, and implements Band X + Band Y + Band B + Band a inter-Band CA using the Band Y, Band B, Band X, and Band a frequency Band signals. The specific processing procedure of inter-band CA can be referred to the prior art, and is not described herein.
In the embodiment, a single antenna in a frequency Band area where Band A is located is designed, and Band X of Band X and Band Y belonging to the same frequency interval is simultaneously allocated to the antenna of Band A for frequency transmission; the radio frequency front end is designed to use a radio frequency switch as an antenna change-over switch of Band A, and a frequency divider is used for dividing frequency of Band X and Band A, so that CA combination of Band A and Band X is further realized; and respectively using an antenna switch for Band Y and Band B and then using the same frequency divider for same-antenna transmission, thereby realizing CA combination of Band B and Band Y. When the carrier aggregation is realized, the quadruplex device is saved, the cost is saved, the insertion loss of the radio frequency front end is reduced, and the structural design of the antenna is optimized.
Based on the same inventive concept, the application also provides a mobile terminal. Please refer to fig. 6, a schematic diagram of a mobile terminal according to the present application. The mobile terminal 60 comprises a carrier aggregation circuit 61. The carrier aggregation circuit 61 is the carrier aggregation circuit described above in this application. The configuration and the advantageous effects of the carrier aggregation circuit 61 are described in detail before, and are not described herein again.
The mobile terminal 60 may also include components such as memory, input units, display units, sensors, audio circuits, processors, and a power supply, including one or more computer-readable storage media. Those skilled in the art will appreciate that the configuration of the mobile terminal 60 shown in fig. 6 is not intended to be limiting of the mobile terminal of the present application and may include more or less components than shown, or some components may be combined, or a different arrangement of components.
The carrier aggregation circuit 61 is configured to receive and transmit electromagnetic waves, and implement interconversion between the electromagnetic waves and electrical signals, so as to communicate with a communication network or other devices. The carrier aggregation circuit 61 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and so forth. The carrier aggregation circuit 51 may communicate with various networks such as the internet, an intranet, a wireless network, or with other devices via a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network.
The above description of the embodiments is only for assisting understanding of the technical solutions and the core ideas thereof; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A carrier aggregation circuit, comprising:
a transceiver;
the first antenna is used for receiving an external first frequency band signal and an external third frequency band signal;
the first signal processing unit is used for acquiring the external first frequency band signal and the external third frequency band signal and outputting the external first frequency band signal and the external third frequency band signal to the transceiver respectively;
the second antenna is used for receiving an external second frequency band signal and an external fourth frequency band signal; and
the second signal processing unit is used for acquiring the external second frequency band signal and the external fourth frequency band signal and outputting the external second frequency band signal and the external fourth frequency band signal to the transceiver respectively; the external second frequency band signal and the external first frequency band signal belong to a first frequency interval, the external third frequency band signal belongs to a second frequency interval, and the external fourth frequency band signal belongs to a third frequency interval;
the transceiver is configured to acquire the external first frequency band signal, the external second frequency band signal, the external third frequency band signal, and the external fourth frequency band signal, and implement inter-band carrier aggregation of the first, second, and third frequency band signals by using the external first frequency band signal, the external third frequency band signal, and the external second frequency band signal.
2. The carrier aggregation circuit of claim 1, wherein the first signal processing unit comprises:
the first frequency divider is connected to the first antenna and is used for dividing the frequency of the external first frequency band signal and the external third frequency band signal;
the first duplexer is accessed to the first frequency divider through a first antenna switch and is used for receiving the external first frequency band signal and outputting the external first frequency band signal to the transceiver; and
and the second duplexer is accessed to the first frequency divider through a second antenna switch and is used for receiving the external first frequency band signal and outputting the external first frequency band signal to the transceiver.
3. The carrier aggregation circuit of claim 1, wherein the second signal processing unit comprises:
the third duplexer is connected to the second antenna through a third antenna switch, and is used for receiving the external second frequency band signal and outputting the external second frequency band signal to the transceiver; and
and the fourth duplexer is connected to the second antenna through the third antenna switch, and is used for receiving the external fourth frequency band signal and outputting the external fourth frequency band signal to the transceiver.
4. The carrier aggregation circuit of claim 1, wherein the transceiver is further configured to implement inter-band carrier aggregation of the first, second, third, and fourth frequency band signals by using the external first frequency band signal, the external third frequency band signal, the external second frequency band signal, and the external fourth frequency band signal.
5. The carrier aggregation circuit of claim 4, wherein the second signal processing unit comprises:
the second frequency divider is connected to the second antenna and is used for dividing the frequency of the external second frequency band signal and the external fourth frequency band signal;
the third duplexer is accessed to the second frequency divider, is used for receiving the external second frequency band signal and outputs the external second frequency band signal to the transceiver; and
and the fourth duplexer is accessed to the second frequency divider through the third antenna switch and is used for receiving the external fourth frequency band signal and outputting the external fourth frequency band signal to the transceiver.
6. The carrier aggregation circuit of claim 1, wherein the third frequency interval is a high-band frequency interval or an ultra-high-band frequency interval.
7. The carrier aggregation circuit of claim 6, wherein the second frequency interval is a mid-band frequency interval and the first frequency interval is a low-band frequency interval; or the second frequency interval is a low-frequency band frequency interval, and the first frequency interval is a middle-frequency band frequency interval.
8. The carrier aggregation circuit of claim 1,
the first antenna is further used for transmitting an internal first frequency band signal and an internal third frequency band signal;
the second antenna is further configured to transmit an internal second frequency band signal and an internal fourth frequency band signal.
9. The carrier aggregation circuit of claim 1, wherein the circuit further comprises: the power amplifier module comprises at least one power amplifier; one end of the power amplifier module is connected with the transceiver, and the other end of the power amplifier module is connected with the first signal processing unit and the second signal processing unit respectively.
10. A mobile terminal, comprising: the carrier aggregation circuit of any of claims 1-9.
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| CN111478709B (en) | 2021-11-16 |
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