CN116388793A - Radio frequency front-end circuit and electronic equipment - Google Patents
Radio frequency front-end circuit and electronic equipment Download PDFInfo
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- CN116388793A CN116388793A CN202310432149.6A CN202310432149A CN116388793A CN 116388793 A CN116388793 A CN 116388793A CN 202310432149 A CN202310432149 A CN 202310432149A CN 116388793 A CN116388793 A CN 116388793A
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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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- 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 circuit and electronic equipment, belongs to the technical field of electronic circuits. Wherein the radio frequency front-end circuit comprises: first antenna, first switch, first filter, first transmit signal amplifier, first receive signal amplifier and radio frequency transceiver, wherein: the first output end of the radio frequency transceiver is connected with the input end of the first transmission signal amplifier, the output end of the first transmission signal amplifier is connected with the first fixed contact of the first switch, the movable contact of the first switch is connected with the first end of the first filter, and the second end of the first filter is connected with the first antenna; the first input end of the radio frequency transceiver is connected with the output end of the first receiving signal amplifier, and the input end of the first receiving signal amplifier is connected with the second stationary contact of the first switch.
Description
Technical Field
The application belongs to the technical field of electronic circuits, and particularly relates to a radio frequency front-end circuit and electronic equipment.
Background
Mobile communication systems have undergone 2G, 3G and 4G developments, and have now entered the 5G era substantially entirely.
Currently, 5G has two modes, namely independent networking (SA) and Non-independent Networking (NSA). Under the non-independent networking, the 5G needs the parallel transceiving of LTE and NR. Based on this, for the non-independent networking, the complexity of the radio frequency front-end circuit on the mobile terminal is increased, and the hardware cost is also increased.
How to improve the rf front-end circuit to reduce the number of devices in the rf front-end circuit, thereby reducing the complexity and hardware cost of the rf front-end circuit is one of the technical problems to be solved.
Disclosure of Invention
The embodiment of the application aims to provide a radio frequency front-end circuit and electronic equipment, which can solve the technical problems of how to improve the radio frequency front-end circuit to reduce the number of devices in the radio frequency front-end circuit, thereby reducing the complexity of the radio frequency front-end circuit and the hardware cost.
In a first aspect, an embodiment of the present application provides a radio frequency front-end circuit, including: first antenna, first switch, first filter, first transmit signal amplifier, first receive signal amplifier and radio frequency transceiver, wherein:
the first output end of the radio frequency transceiver is connected with the input end of the first transmission signal amplifier, the output end of the first transmission signal amplifier is connected with the first fixed contact of the first switch, the movable contact of the first switch is connected with the first end of the first filter, and the second end of the first filter is connected with the first antenna;
the first input end of the radio frequency transceiver is connected with the output end of the first receiving signal amplifier, and the input end of the first receiving signal amplifier is connected with the second stationary contact of the first switch;
The first transmission signal amplifier is used for amplifying the NR frequency band transmission signal and the LTE frequency band transmission signal, and the first filter is used for filtering noise in the amplified NR frequency band transmission signal and the amplified LTE frequency band transmission signal;
the first filter is further configured to filter the radio frequency signal to obtain a first NR frequency band main set received signal and a first LTE frequency band main set received signal, and the first received signal amplifier is configured to amplify the first NR frequency band main set received signal and the first LTE frequency band main set received signal.
In a second aspect, an embodiment of the present application provides an electronic device, where the electronic device includes the radio frequency front-end circuit in the first aspect.
There is provided in the present application a radio frequency front end circuit comprising: first antenna, first switch, first filter, first transmit signal amplifier, first receive signal amplifier and radio frequency transceiver, wherein: the first output end of the radio frequency transceiver is connected with the input end of the first transmission signal amplifier, the output end of the first transmission signal amplifier is connected with the first fixed contact of the first switch, the movable contact of the first switch is connected with the first end of the first filter, and the second end of the first filter is connected with the first antenna; the first input end of the radio frequency transceiver is connected with the output end of the first receiving signal amplifier, and the input end of the first receiving signal amplifier is connected with the second stationary contact of the first switch; the first transmission signal amplifier is used for amplifying the NR frequency band transmission signal and the LTE frequency band transmission signal, and the first filter is used for filtering noise in the amplified NR frequency band transmission signal and the amplified LTE frequency band transmission signal; the first filter is further configured to filter the radio frequency signal to obtain a first NR frequency band main set received signal and a first LTE frequency band main set received signal, and the first received signal amplifier is configured to amplify the first NR frequency band main set received signal and the first LTE frequency band main set received signal. Based on the radio frequency front-end circuit provided by the embodiment of the application, through the same transmitting channel consisting of the first transmitting signal amplifier, the first switch, the first filter and the first antenna, the transmission of the NR frequency band transmitting signal and the LTE frequency band transmitting signal can be completed. Multiplexing the transmission paths by the NR frequency band transmission paths and the LTE frequency band transmission paths can be realized. And receiving the first NR frequency band main set receiving signal and the first LTE frequency band main set receiving signal can be completed through one main set receiving path consisting of the first antenna, the first filter, the first switch and the first receiving signal amplifier. And the same main set receiving channel can be realized by the NR frequency band main set receiving channel and the LTE frequency band main set receiving channel. Therefore, the number of devices in the radio frequency front-end circuit can be reduced in a multiplexing mode, and the complexity and hardware cost of the radio frequency front-end circuit are reduced.
Drawings
Fig. 1 is a schematic structural diagram of a radio frequency front-end circuit according to an embodiment of the present application;
fig. 2 is a schematic diagram of a second structure of a radio frequency front-end circuit according to an embodiment of the present application;
fig. 3 is a schematic structural diagram III of a radio frequency front-end circuit according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a radio frequency front-end circuit according to an embodiment of the present application;
fig. 5 is a schematic diagram of a structure of a radio frequency front-end circuit according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a radio frequency front-end circuit according to an embodiment of the present application.
Detailed Description
Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The radio frequency front-end circuit and the electronic device provided by the embodiment of the application are described in detail below by means of specific embodiments and application scenes thereof with reference to the accompanying drawings.
The embodiment of the application provides a radio frequency front-end circuit, as shown in fig. 1, which includes: a first antenna 101, a first switch 201, a first filter 301, a first transmit signal amplifier 401, a first receive signal amplifier 501, and a radio frequency transceiver 601, wherein:
a first output end of the radio frequency transceiver 601 is connected with an input end of the first transmission signal amplifier 401, an output end of the first transmission signal amplifier 401 is connected with a first fixed contact of the first switch 201, a movable contact of the first switch 201 is connected with a first end of the first filter 301, and a second end of the first filter 301 is connected with the first antenna 101;
a first input end of the radio frequency transceiver 601 is connected with an output end of the first receiving signal amplifier 501, and an input end of the first receiving signal amplifier 501 is connected with a second fixed contact of the first switch 201;
the first transmit signal amplifier 401 is configured to amplify an NR frequency band transmit signal and an LTE frequency band transmit signal, and the first filter 301 is configured to filter noise in the amplified NR frequency band transmit signal and the LTE frequency band transmit signal;
The first filter 301 is further configured to filter the radio frequency signal to obtain a first NR frequency band primary set received signal and a first LTE frequency band primary set received signal, and the first received signal amplifier 501 is configured to amplify the first NR frequency band primary set received signal and the first LTE frequency band primary set received signal.
In this embodiment of the present application, the first transmit signal amplifier 401 is configured to amplify an NR frequency band transmit signal and an LTE frequency band transmit signal, and specifically refers to: the first transmit signal amplifier 401 is configured to amplify an NR frequency band transmit signal when receiving an NR frequency band transmit signal sent by the radio frequency transceiver 601 at a transmit time of the NR frequency band transmit signal, and amplify an LTE frequency band transmit signal when receiving an LTE frequency band transmit signal sent by the radio frequency transceiver 601 at a transmit time of the LTE frequency band transmit signal.
The first filter 301 is configured to filter noise in the amplified NR frequency band transmission signal and the LTE frequency band transmission signal, and specifically refers to: the first filter 301 is configured to filter noise in the amplified NR frequency band transmission signal when the amplified NR frequency band transmission signal is received, and filter noise in the amplified LTE frequency band transmission signal when the amplified LTE frequency band transmission signal is received;
The first filter 301 is further configured to filter the radio frequency signal to obtain a first NR frequency band main set received signal and a first LTE frequency band main set received signal, and specifically, the first filter 301 is configured to filter the radio frequency signal at a receiving time of the first NR frequency band main set received signal to obtain a first NR frequency band main set received signal, and filter the radio frequency signal at a receiving time of the first LTE frequency band main set received signal to obtain a first LTE frequency band main set received signal;
and, the first received signal amplifier 501 is configured to amplify the first NR frequency band main set received signal and the first LTE frequency band main set received signal, specifically, the first received signal amplifier 501 is configured to amplify the first NR frequency band main set received signal when receiving the first NR frequency band main set received signal sent by the first filter 301, and to amplify the first LTE frequency band main set received signal when receiving the first LTE frequency band main set received signal sent by the first filter 301.
The radio frequency front-end circuit provided by the embodiment of the application is applied to an NSA architecture. And, the NSA architecture corresponds to two modes, EUTRA-NR dual connectivity (EUTRA-NR Dual Connection, ENDC) and carrier aggregation CA (Carrier Aggregation).
In one example, the first filter 301 is a surface acoustic wave (Surface Acoustic Wave, SAW) filter. The first transmit signal Amplifier 401 is a Power Amplifier (PA). The first receive signal amplifier 501 is a low noise amplifier (low noise amplifier, LNA). The radio frequency Transceiver 601 is a Transceiver (transmitter).
In one example, the NR frequency band transmit signal is an N41 TX frequency band signal, the first NR frequency band primary set receive signal is an N41 PRX frequency band signal, the LTE frequency band transmit signal is a B41 TX frequency band signal, and the first LTE frequency band primary set receive signal is a B41 PRX frequency band signal.
In the embodiment of the present application, the first filter 301 is specifically a duplex filter. And, as shown in fig. 1 to 6, the first switch 201 is embodied as a single pole double throw switch.
The radio frequency transceiver 601 may be configured to receive and process the first NR frequency band primary set received signal amplified by the first received signal amplifier 501, and may be configured to receive and process the first LTE frequency band primary set received signal amplified by the first received signal amplifier 501. And, the radio frequency transceiver 601 may be used to transmit both NR band transmission signals to the first transmission signal amplifier 401 and LTE band transmission signals to the first transmission signal amplifier 401.
The first antenna 101 is configured to receive radio frequency signals (band not limited), and transmit LTE band transmission signals and NR band transmission signals. The transmitting LTE band transmission signal and the NR band transmission signal specifically refer to transmitting the LTE band transmission signal when the first antenna 101 receives the LTE band transmission signal sent by the first filter 301, and transmitting the NR band transmission signal when the NR band transmission signal sent by the first filter 301 is received.
In combination with the above, in the embodiment of the present application, at the transmission time of the NR band transmission signal, the first stationary contact of the first switch 101 is connected to the movable contact of the first switch 101. The radio frequency transceiver 601 transmits an NR band transmit signal to the first transmit signal amplifier 401. The first transmission signal amplifier 401 amplifies the NR band transmission signal and then transmits the amplified NR band transmission signal to the first filter 301. The first filter 301 performs noise filtering on the amplified NR frequency band transmission signal, and sends the amplified NR frequency band transmission signal with noise filtered to the first antenna 101, and the amplified NR frequency band transmission signal is transmitted by the first antenna 101. Thus, the radio frequency front-end circuit completes the transmission of the NR frequency band transmission signal.
Similarly, at the transmission time of the LTE band transmission signal, the first stationary contact of the first switch 101 is connected to the movable contact of the first switch 101. The radio frequency transceiver 601 transmits an LTE band transmission signal to the first transmission signal amplifier 401. The first transmit signal amplifier 401 amplifies the LTE band transmit signal, and then transmits the amplified LTE band transmit signal to the first filter 301. The first filter 301 performs noise filtering on the amplified LTE band transmission signal, and sends the amplified LTE band transmission signal with noise filtered to the first antenna 101, and the amplified LTE band transmission signal is transmitted by the first antenna 101. Thus, the radio frequency front-end circuit completes the transmission of the LTE frequency band transmission signal.
And, at the receiving time of the first NR frequency band main set received signal, the second stationary contact of the first switch 101 is connected to the movable contact of the first switch 101. The first antenna 101 receives a radio frequency signal and transmits the received radio frequency signal to the first filter 301. The first filter 301 filters out-of-band signals (i.e., interference signals other than the first NR band main set of received signals) from the received radio frequency signals to obtain first NR band main set of received signals, and sends the first NR band main set of received signals to the first received signal amplifier 501. The first received signal amplifier 501 amplifies the received first NR frequency band main set received signal to obtain an amplified first NR frequency band main set received signal, and sends the amplified first NR frequency band main set received signal to the radio frequency transceiver 601. The radio frequency transceiver 601 parses the amplified first NR frequency band primary set of received signals. Thus, the radio frequency front-end circuit completes the reception of the received signal of the first NR frequency band main set.
Similarly, at the time of receiving the signal received by the first LTE band main set, the first stationary contact of the first switch 101 is connected to the movable contact of the first switch 101. The first antenna 101 receives a radio frequency signal and transmits the received radio frequency signal to the first filter 301. The first filter 301 filters out-of-band signals (i.e., interference signals other than the first LTE band main set received signals) from the received radio frequency signals, and sends the first LTE band main set received signals to the first received signal amplifier 501. The first received signal amplifier 501 amplifies the received first LTE band main set received signal, and obtains an amplified first LTE band main set received signal, and sends the amplified first LTE band main set received signal to the radio frequency transceiver 601. The radio frequency transceiver 601 parses the amplified first LTE band main set received signal. Thus, the radio frequency front-end circuit completes the reception of the first LTE frequency band main set received signal.
In summary, the transmission of the NR band transmission signal and the LTE band transmission signal can be completed by the same transmission path composed of the first transmission signal amplifier 401, the first switch 201, the first filter 301, and the first antenna 101. Namely, multiplexing the same transmission channel by the NR frequency band transmission channel and the LTE frequency band transmission channel is realized.
In one example, in the case where the NR frequency band transmission signal is an N41 TX frequency band signal and the LTE frequency band transmission signal is a B41 TX frequency band signal, multiplexing of the transmission path of the N41 TX frequency band signal and the transmission path of the B41 TX frequency band transmission signal by the transmission path may be achieved.
In view of the above, only one transmitting path is required to be provided in the radio frequency front-end circuit, and the NR frequency band transmitting path and the LTE frequency band transmitting path which are independent of each other are not required to be provided. This reduces the number of devices in the rf front-end circuit, thereby reducing the complexity and hardware cost of the rf front-end circuit.
And, the reception of the first NR frequency band main set reception signal and the first LTE frequency band main set reception signal can be completed through one main set reception path composed of the first antenna 101, the first filter 301, the first switch 201, and the first reception signal amplifier 501. The method realizes multiplexing of the NR frequency band main set receiving channel and the LTE frequency band main set receiving channel to the same main set receiving channel.
In one example, in the case where the first LTE band main set received signal is a B41 PRX band signal and the first NR band main set received signal is an N41 PRX band signal, the receiving path may be used for receiving paths of the B41 PRX band signal and the N41 PRX band signal.
In view of the above, it is only necessary to set a main set receiving path in the radio frequency front-end circuit, and there is no need to set a first LTE band main set receiving circuit and a first NR band main set receiving path that are independent of each other. This further reduces the number of devices in the rf front-end circuit, thereby reducing the complexity and hardware cost of the rf front-end circuit.
It should be noted that, in the conventional technology, the capability of the PMIC/PMU on the die where the rf front-end circuit is located is limited, and the PMIC/PMU is only available for the rf devices corresponding to LTE on the rf front-end circuit, but not for the rf devices corresponding to NR on the rf front-end circuit, so that an additional PMIC/PMU needs to be provided for the rf devices corresponding to NR. This results in the transmit path of the N41 TX band signal in the radio frequency front end circuit being independent of the transmit path of the B41 TX band signal and the main set receive path of the N41PRX band signal being independent of the main set receive path of the B41 PRX band signal. The capability of PMIC/PMU and the like on the chip of the current radio frequency front-end circuit is improved, and the device can be used for radio frequency devices corresponding to LTE and NR on the radio frequency front-end circuit. Thus, the transmit path of the N41 TX band signal and the transmit path of the B41 TX band signal in the radio frequency front end circuit may be multiplexed, and the main set receive path of the N41PRX band signal and the main set receive path of the B41 PRX band signal may be multiplexed.
There is provided in the present application a radio frequency front end circuit comprising: first antenna, first switch, first filter, first transmit signal amplifier, first receive signal amplifier and radio frequency transceiver, wherein: the first output end of the radio frequency transceiver is connected with the input end of the first transmission signal amplifier, the output end of the first transmission signal amplifier is connected with the first fixed contact of the first switch, the movable contact of the first switch is connected with the first end of the first filter, and the second end of the first filter is connected with the first antenna; the first input end of the radio frequency transceiver is connected with the output end of the first receiving signal amplifier, and the input end of the first receiving signal amplifier is connected with the second stationary contact of the first switch; the first transmission signal amplifier is used for amplifying the NR frequency band transmission signal and the LTE frequency band transmission signal, and the first filter is used for filtering noise in the amplified NR frequency band transmission signal and the amplified LTE frequency band transmission signal; the first filter is further configured to filter the radio frequency signal to obtain a first NR frequency band main set received signal and a first LTE frequency band main set received signal, and the first received signal amplifier is configured to amplify the first NR frequency band main set received signal and the first LTE frequency band main set received signal. Based on the radio frequency front-end circuit provided by the embodiment of the application, through the same transmitting channel consisting of the first transmitting signal amplifier, the first switch, the first filter and the first antenna, the transmission of the NR frequency band transmitting signal and the LTE frequency band transmitting signal can be completed. Multiplexing the transmission paths by the NR frequency band transmission paths and the LTE frequency band transmission paths can be realized. And receiving the first NR frequency band main set receiving signal and the first LTE frequency band main set receiving signal can be completed through one main set receiving path consisting of the first antenna, the first filter, the first switch and the first receiving signal amplifier. And the same main set receiving channel can be realized by the NR frequency band main set receiving channel and the LTE frequency band main set receiving channel. Therefore, the number of devices in the radio frequency front-end circuit can be reduced in a multiplexing mode, and the complexity and hardware cost of the radio frequency front-end circuit are reduced.
In one embodiment of the present application, as shown in fig. 2, the radio frequency front-end circuit provided in the embodiment of the present application further includes: a second receive signal amplifier 502, a second antenna 102, and a second filter 302, wherein:
a second input terminal of the radio frequency transceiver 601 is connected to an output terminal of the second receive signal amplifier 502, an input terminal of the second receive signal amplifier 502 is connected to a first terminal of the second filter 302, and a second terminal of the second filter 302 is connected to the second antenna 102;
the second filter 302 is configured to filter the radio frequency signal to obtain a second NR frequency band primary set received signal and a second LTE frequency band primary set received signal, and the second received signal amplifier 502 is configured to amplify the second NR frequency band primary set received signal and the second LTE frequency band primary set received signal.
It should be noted that, in the embodiment of the present application, the second filter 302 is configured to filter the radio frequency signal to obtain a second NR frequency band main set received signal and a second LTE frequency band main set received signal, which specifically refers to: the second filter 302 filters the radio frequency signal at the receiving time of the second NR frequency band main set received signal to obtain a second NR frequency band main set received signal, and filters the radio frequency signal at the receiving time of the second LTE frequency band main set received signal to obtain a second LTE frequency band main set received signal.
And, the second received signal amplifier 502 is configured to amplify the second NR frequency band main set received signal and the second LTE frequency band main set received signal, specifically: the second received signal amplifier 502 amplifies the second NR frequency band primary set received signal when receiving the second NR frequency band primary set received signal transmitted by the second filter 302, and amplifies the second LTE frequency band primary set received signal when receiving the second LTE frequency band primary set received signal transmitted by the second filter 302.
In the embodiment of the present application, the second antenna 102 is configured to receive radio frequency signals (frequency band is not limited).
In one example, the first filter 301 may also be a surface acoustic wave filter. The second receive signal amplifier 502 is a low noise amplifier.
And when the first LTE frequency band main set received signal is the B41 PRX frequency band signal and the first NR frequency band main set received signal is the N41 PRX frequency band signal, the second LTE frequency band main set received signal is the B41 PRX MIMO frequency band signal and the second NR frequency band main set received signal is the N41 PRX MIMO frequency band signal.
In the conventional technology, the same receiving path corresponding to the second LTE band main set of receiving signals and the second NR band main set of receiving signals uses the same receiving signal amplifier as the receiving path corresponding to the first LTE band main set of receiving signals.
In the radio frequency circuit provided by the embodiment of the application, a receiving path corresponding to a first LTE frequency band main set receiving signal and a receiving path corresponding to a first NR frequency band main set receiving signal are the same receiving path. Whereas communication protocols typically require four receive antennas in the NR frequency band to receive four receive radio frequency signals (including a first main set of receive signals, e.g., PRX, a second main set of receive signals, e.g., PRXMIMO, a first diversity of receive signals, e.g., DRX, and a second diversity of receive signals, e.g., DRXMIMO), i.e., the receive path corresponding to the first main set of receive signals and the receive path corresponding to the second main set of receive signals in the NR frequency band cannot use the same receive signal amplifier. Therefore, in order to adapt to the radio frequency circuit provided in the embodiment of the present application, the received signal amplifier on the receiving path corresponding to the received signal of the second NR frequency band main set cannot be the first received signal amplifier 501 used for the receiving path corresponding to the received signal of the first NR frequency band main set. Based on this, as shown in fig. 2, a second received signal amplifier 502 is provided for the received path corresponding to the received signal of the second NR frequency band main set.
In this embodiment of the present application, at the time of receiving the second LTE band main set received signal, the second antenna 102 receives the radio frequency signal, and sends the received radio frequency signal to the second filter 302. The second filter 302 filters the radio frequency signal to obtain a second LTE band main set received signal and sends it to the second received signal amplifier 502. The second received signal amplifier 502 amplifies the second LTE band main set received signal and transmits it to the radio frequency transceiver 601. The radio frequency transceiver 601 parses the amplified second LTE band main set received signal.
In one embodiment of the present application, as shown in fig. 3, the radio frequency front-end circuit provided in the embodiment of the present application further includes: the radio frequency front end circuit further comprises: a third antenna 103, a fourth antenna 104, a third filter 303, a fourth filter 304, a third received signal amplifier 503, and a fourth received signal amplifier 504, wherein:
a third input terminal of the radio frequency transceiver 601 is connected to an output terminal of the third receive signal amplifier 503, an input terminal of the third receive signal amplifier 503 is connected to a first terminal of the third filter 303, and a second terminal of the third filter 303 is connected to the third antenna 103;
a fourth input terminal of the radio frequency transceiver 601 is connected to an output terminal of the fourth receive signal amplifier 504, an input terminal of the fourth receive signal amplifier 504 is connected to a first terminal of the fourth filter 304, and a second terminal of the fourth filter 304 is connected to the fourth antenna 104;
the third filter 303 is configured to filter the radio frequency signal to obtain a first NR frequency band diversity reception signal and a first LTE frequency band diversity reception signal, and the third reception signal amplifier 503 is configured to amplify the first NR frequency band diversity reception signal and the first LTE frequency band diversity reception signal;
the fourth filter 304 is configured to filter the radio frequency signal to obtain a second NR frequency band diversity receive signal and a second LTE frequency band diversity receive signal, and the fourth receive signal amplifier 504 is configured to amplify the second NR frequency band diversity receive signal and the second LTE frequency band diversity receive signal.
It should be noted that, in the embodiment of the present application, the third filter 303 is configured to filter the radio frequency signal to obtain a first NR frequency band diversity receiving signal and a first LTE frequency band diversity receiving signal, which specifically refers to: the third filter 303 is configured to filter the radio frequency signal at a receiving time of the first NR frequency band diversity receive signal to obtain the first NR frequency band diversity receive signal, and filter the radio frequency signal at a receiving time of the first LTE frequency band diversity receive signal to obtain the first LTE frequency band diversity receive signal;
the third received signal amplifier 503 is configured to amplify the first NR frequency band diversity received signal and the first LTE frequency band diversity received signal, specifically: the third received signal amplifier 503 is configured to amplify the first NR frequency band diversity received signal when receiving the first LTE frequency band diversity received signal sent by the third filter 303, and amplify the first LTE frequency band diversity received signal when receiving the first LTE frequency band diversity received signal sent by the third filter 303;
the fourth filter 304 is configured to filter the radio frequency signal to obtain a second NR frequency band diversity receiving signal and a second LTE frequency band diversity receiving signal, specifically: the fourth filter 304 is configured to filter the radio frequency signal at a receiving time of the second NR frequency band diversity reception signal to obtain the second NR frequency band diversity reception signal, and filter the radio frequency signal at a receiving time of the second LTE frequency band diversity reception signal to obtain the second LTE frequency band diversity reception signal;
The fourth received signal amplifier 504 is configured to amplify the second NR frequency band diversity received signal and the second LTE frequency band diversity received signal, specifically: the fourth received signal amplifier 504 is configured to amplify the second NR frequency band diversity received signal when the second NR frequency band diversity received signal transmitted by the fourth filter 304 is received, and amplify the second LTE frequency band diversity received signal when the second LTE frequency band diversity received signal transmitted by the fourth filter 304 is received.
In the embodiment of the present application, the third antenna 103 and the fourth antenna 104 are used for receiving radio frequency signals.
In one example, the third filter 303 and the fourth filter 304 are surface acoustic wave filters. The third received signal amplifier 503 and the fourth received signal amplifier 504 are low noise amplifiers.
In the embodiment of the present application, the communication protocol generally specifies that four receiving antennas are required in the NR frequency band to receive four received radio frequency signals. To meet this requirement, the radio frequency circuit provided in the embodiment of the present application further includes, on the basis of the illustration in fig. 1, a third antenna 103 and a fourth antenna 104 to receive radio frequency signals. Specific:
at the reception timing of the first NR band diversity reception signal, the third antenna 103 receives a radio frequency signal and transmits the received radio frequency signal to the third filter 303. The third filter 303 filters the radio frequency signal to obtain a first NR band diversity receive signal and sends it to the third receive signal amplifier 503. The third received signal amplifier 503 amplifies the first NR frequency band diversity received signal and transmits it to the radio frequency transceiver 601. The radio frequency transceiver 601 parses the amplified first NR band diversity receive signal.
At the time of receiving the second NR frequency band diversity reception signal, the fourth antenna 104 receives a radio frequency signal and transmits the received radio frequency signal to the fourth filter 304. The fourth filter 304 filters the radio frequency signal to obtain a second NR band diversity receive signal and sends it to a fourth receive signal amplifier 504. The fourth received signal amplifier 504 amplifies the second NR frequency band diversity received signal and transmits it to the radio frequency transceiver 601. The radio frequency transceiver 601 parses the amplified second NR band diversity receive signal.
In addition, at the time of reception of the diversity reception signal of the first LTE band, the third antenna 103 receives the radio frequency signal and transmits the received radio frequency signal to the third filter 303. The third filter 303 filters the radio frequency signal to obtain a first LTE band diversity reception signal and sends it to the third reception signal amplifier 503. The third received signal amplifier 503 amplifies the first LTE band diversity received signal and transmits it to the radio frequency transceiver 601. The radio frequency transceiver 601 parses the amplified first LTE band diversity received signal.
And, at the time of receiving the second LTE band diversity reception signal, the fourth antenna 104 receives the radio frequency signal, and sends the received radio frequency signal to the fourth filter 304. The fourth filter 304 filters the radio frequency signal to obtain a second LTE band diversity receive signal and sends it to the fourth receive signal amplifier 504. The fourth received signal amplifier 504 amplifies the second LTE band diversity received signal and transmits it to the radio frequency transceiver 601. The radio frequency transceiver 601 parses the amplified second LTE band diversity received signal.
In one example, when the first LTE band primary set received signal is a B41 PRX band signal, the first NR band primary set received signal is a N41 PRX band signal, the second LTE band primary set received signal is a B41 PRX MIMO band signal, the second NR band primary set received signal is a N41 PRX MIMO band signal, the first LTE band diversity received signal is a B41 DRX band signal, the first NR band diversity received signal is a N41 DRX band signal, the second LTE band diversity received signal is a B41 DRX MIMO band signal, and the second NR band diversity received signal is a N41 DRX MIMO band signal.
In one embodiment of the present application, as shown in fig. 4, the radio frequency circuit provided in the embodiment of the present application further includes: a fifth antenna 105, a fifth filter 305 and a second transmit signal amplifier 402, wherein:
a second output terminal of the radio frequency transceiver 601 is connected to an input terminal of the second transmit signal amplifier 402, an output terminal of the second transmit signal amplifier 402 is connected to a first terminal of the fifth filter 305, and a second terminal of the fifth filter 305 is connected to the fifth antenna 105;
the second transmit signal amplifier 402 is configured to amplify the first frequency band transmit signal, and the fifth filter 305 is configured to filter noise in the amplified first frequency band transmit signal.
In the embodiment of the present application, the fifth antenna 105 is configured to transmit the first frequency band transmission signal after noise is filtered by the fifth filter 305. Wherein the first frequency band transmission signal is a transmission signal different from the NR frequency band transmission signal and the LTE frequency band transmission signal.
In this embodiment of the present application, the transmission path formed by the second transmission signal amplifier 402, the fifth filter 305 and the fifth antenna 105 is specifically a transmission path of an NR band transmission signal in the conventional technology (such as a transmission path of an N41 band transmission signal). Namely, the transmission path of the NR frequency band transmission signal in the conventional technology is reserved in the embodiment. The purpose of this is to use the transmission path of the transmission signal of the NR frequency band in the conventional technology to transmit the transmission signal of the first frequency band in order to satisfy some areas.
In the embodiment of the present application, at the transmission time of the first frequency band transmission signal, the radio frequency transceiver 601 sends the first frequency band transmission signal to the second transmission signal amplifier 402. The second transmit signal amplifier 402 amplifies the received first band transmit signal and then sends it to the fifth filter 305. The fifth filter 305 filters noise (interference signals other than the first frequency band transmission signal) in the amplified first frequency band transmission signal, and then transmits the noise to the fifth antenna 105, and further, the noise is transmitted by the fifth antenna 105.
It will be appreciated that in the embodiment shown in fig. 4, the transmission path of the NR frequency band transmission signal of the conventional technology is used in some areas to transmit a transmission signal of a first frequency band. There are areas where transmission signals of at least two first frequency bands are transmitted using transmission paths of transmission signals of NR frequency bands in the conventional art. Based on the above, a filter and a switch corresponding to each frequency band can be set, and the switch is switched to the path where the filter of the current frequency band is located. In an example, taking a transmission path of an NR frequency band transmission signal in a conventional technology as an example, two first frequency band transmission signals are transmitted, a radio frequency front end circuit provided in an embodiment of the present application is shown in fig. 5.
Specifically, on the basis of the embodiment shown in fig. 4, the radio frequency front-end circuit provided in the embodiment of the present application further includes: a second switch 202 and a sixth filter 306, wherein:
the first stationary contact of the second switch 202 is connected to the second end of the fifth filter 305, and the movable contact of the second switch 202 is connected to the fifth antenna 105;
a first end of the sixth filter 306 is connected to the output of the second transmit signal amplifier 402, and a second end of the sixth filter 306 is connected to the second stationary contact of the second switch 202;
The second transmit signal amplifier 402 is further configured to amplify the second frequency band transmit signal, and the sixth filter is configured to filter noise in the amplified second frequency band transmit signal.
In this embodiment of the present application, the second frequency band transmission signal is a signal different from the NR frequency band transmission signal, the LTE frequency band transmission signal, and the first frequency band transmission signal.
And, the fifth antenna 105 is further configured to transmit the amplified second band transmission signal from which noise is filtered by the sixth filter 306.
In this embodiment of the present application, at the time of transmitting the signal in the first frequency band, the first stationary contact of the second switch 202 is connected to the moving contact of the second switch 202. The radio frequency transceiver 601 transmits the first frequency band transmit signal to the second transmit signal amplifier 402. The second transmit signal amplifier 402 amplifies the received first band transmit signal and then sends it to the fifth filter 305. The fifth filter 305 filters noise (interference signals other than the first frequency band transmission signal) in the amplified first frequency band transmission signal, and then transmits the noise to the fifth antenna 105, and further, the noise is transmitted by the fifth antenna 105.
In this embodiment of the present application, at the time of transmitting the signal in the second frequency band, the second stationary contact of the second switch 202 is connected to the moving contact of the second switch 202. The radio frequency transceiver 601 transmits a second frequency band transmit signal to the second transmit signal amplifier 402. The second transmit signal amplifier 402 amplifies the received second frequency band transmit signal and then sends it to the fifth filter 305. The fifth filter 305 filters noise (interference signals other than the second frequency band transmission signal) in the amplified second frequency band transmission signal, and then transmits the noise to the fifth antenna 105, and further, the noise is transmitted by the fifth antenna 105.
In one embodiment of the present application, as shown in fig. 6, the radio frequency front end circuit provided in the embodiment of the present application further includes: a third switch 203, wherein:
a first stationary contact of the third switch 203 is connected to the input of the first receiving signal amplifier 501, a second stationary contact of the third switch 203 is connected to the output of the second transmitting signal amplifier 402, and a movable contact of the third switch 203 is connected to the first end of the fifth filter 305;
the fifth filter 305 is further configured to filter the radio frequency signal to obtain a third frequency band receiving signal, the sixth filter is further configured to filter the radio frequency receiving signal to obtain a fourth frequency band receiving signal, and the first receiving signal amplifier 501 is further configured to amplify the third frequency band receiving signal and the fourth frequency band receiving signal.
It should be noted that, in the embodiment of the present application, the first received signal amplifier 501 is further configured to amplify the third frequency band received signal and the fourth frequency band received signal, which specifically refers to: the first received signal amplifier 501 is configured to amplify the third frequency band received signal when the third frequency band received signal is received, and amplify the fourth frequency band received signal when the fourth frequency band received signal is received.
In the embodiment of the present application, the fifth antenna 105 is further configured to receive radio frequency signals. And, the third switch 203 is specifically a single pole double throw switch.
The third frequency band received signal and the fourth frequency band received signal are different in frequency band and different from any of the above-mentioned frequency bands of received signals.
In the embodiment of the present application, the second transmit signal amplifier 402, the third switch 203, the fifth filter 305, and the fifth antenna 105 are specifically the receiving paths of the first NR frequency band main set of received signals in the conventional technology. I.e. the present embodiment reserves a reception path for the signal received by the primary set of first NR frequency bands. The purpose of this is to receive the third band received signal and the fourth band received signal using the reception path of the first NR band main set received signal in the conventional art in order to satisfy some areas. Meanwhile, in order to avoid the reception path formed by the first transmit signal amplifier 402, the third switch 203, the fifth filter 305 and the fifth antenna 105, the first filter 301 and the first antenna are connected to the same receive signal amplifier, specifically, the same first receive signal amplifier 501, as shown in fig. 6, in order to avoid the reception of the first NR frequency band main set receive signal by the first transmit signal amplifier 401, the first switch 201, the first filter 301 and the first antenna.
In this embodiment of the present application, at the time of receiving the signal in the third frequency band, the first stationary contact of the third switch 203 is connected to the moving contact of the third switch 203, and the first stationary contact of the second switch 202 is connected to the moving contact of the second switch 202. The fifth antenna 105 receives the radio frequency signal and transmits the received radio frequency signal to the fifth filter 305. The fifth filter 305 filters the radio frequency signal to obtain a third band reception signal, and sends it to the first reception signal amplifier 501. The first received signal amplifier 501 amplifies the third band received signal and transmits it to the radio frequency transceiver 601. The radio frequency transceiver 601 parses the amplified third band received signal.
Similarly, at the time of receiving the fourth frequency band reception signal, the second stationary contact of the third switch 203 is connected to the movable contact of the third switch 203, and the second stationary contact of the second switch 202 is connected to the movable contact of the second switch 202. The fifth antenna 105 receives the radio frequency signal and transmits the received radio frequency signal to the sixth filter 306. The sixth filter 306 filters the radio frequency signal to obtain a fourth band reception signal, and sends it to the first reception signal amplifier 501. The first received signal amplifier 501 amplifies the fourth band received signal and transmits it to the radio frequency transceiver 601. The rf transceiver 601 parses the amplified fourth band received signal.
It should be noted that, on the basis of the radio frequency front-end circuit shown in fig. 6, for the area outside the area used by the receiving path of the first NR frequency band main set receiving signal in the conventional technology when receiving the third frequency band receiving signal and the fourth frequency band receiving signal, the number of devices of the radio frequency circuit provided in the embodiment of the present application is reduced. In other words, the radio frequency front-end circuit provided by the embodiment of the application also considers the regional adaptability under the premise of considering the number of devices.
In an embodiment of the present application, in order to improve the utilization rate of devices in the rf front-end circuit shown in fig. 1, as shown in fig. 6, the rf front-end circuit provided in the embodiment of the present application further includes: a fourth switch 204 and a seventh filter 307, wherein:
a first stationary contact of the fourth switch 204 is connected to the second end of the first filter 301, and a movable contact of the fourth switch 204 is connected to the first antenna 101;
the second stationary contact of the fourth switch 204 is connected to the first end of the seventh filter 307, and the second end of the seventh filter 307 is connected to the movable contact of the first switch 201.
The seventh filter 307 is configured to filter the radio frequency signal to obtain a fifth frequency band transceiver signal.
In this embodiment of the present application, the fifth frequency band transceiver signal is a fifth frequency band receiver signal or a fifth frequency band transmitter signal. And the fifth frequency band received signal is different from the received signal of any frequency band, and the fifth transmitted signal is different from the transmitted signal of any frequency band. The fourth switch 204 is embodied as a single pole double throw switch.
In one example, the seventh filter 307 may be illustratively a surface acoustic wave filter.
In the embodiment of the present application, the first transmit signal amplifier 401 and the first antenna 101 may be multiplexed as devices in the transmit path of the fifth frequency band transmit signal. And, the first received signal amplifier 501 and the first antenna 101 may be multiplexed as devices in the receive path of the fifth band received signal.
It is understood that the fourth switch 204 may be embodied as a single pole, multi-throw switch, and that the number of stationary contacts of the filter connected to the fourth switch 204 is the same as that of the single pole, multi-throw switch. In this way, the utilization of devices in the radio frequency front-end circuit shown in fig. 1 can be further improved.
The embodiment of the application also provides electronic equipment, which comprises the radio frequency front-end circuit provided by any one of the embodiments.
In one embodiment of the present application, the electronic device may be: the embodiments of the present application are not limited to mobile phones, tablet computers, notebook computers, palm computers, vehicle-mounted electronic devices, and the like.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
Claims (9)
1. A radio frequency front-end circuit, comprising: first antenna, first switch, first filter, first transmit signal amplifier, first receive signal amplifier and radio frequency transceiver, wherein:
the first output end of the radio frequency transceiver is connected with the input end of the first transmission signal amplifier, the output end of the first transmission signal amplifier is connected with the first fixed contact of the first switch, the movable contact of the first switch is connected with the first end of the first filter, and the second end of the first filter is connected with the first antenna;
the first input end of the radio frequency transceiver is connected with the output end of the first receiving signal amplifier, and the input end of the first receiving signal amplifier is connected with the second stationary contact of the first switch;
the first transmission signal amplifier is used for amplifying the NR frequency band transmission signal and the LTE frequency band transmission signal, and the first filter is used for filtering noise in the amplified NR frequency band transmission signal and the amplified LTE frequency band transmission signal;
the first filter is further configured to filter the radio frequency signal to obtain a first NR frequency band main set received signal and a first LTE frequency band main set received signal, and the first received signal amplifier is configured to amplify the first NR frequency band main set received signal and the first LTE frequency band main set received signal.
2. The circuit of claim 1, wherein the radio frequency front end circuit further comprises: a second received signal amplifier, a second antenna, and a second filter, wherein:
the second input end of the radio frequency transceiver is connected with the output end of the second receiving signal amplifier, the input end of the second receiving signal amplifier is connected with the first end of the second filter, and the second end of the second filter is connected with the second antenna;
the second filter is configured to filter the radio frequency signal to obtain a second NR frequency band main set received signal and a second LTE frequency band main set received signal, and the second receive signal amplifier is configured to amplify the second NR frequency band main set received signal and the second LTE frequency band main set received signal.
3. The circuit of claim 1 or 2, wherein the radio frequency front-end circuit further comprises: third antenna, fourth antenna, third filter, fourth filter, third received signal amplifier and fourth received signal amplifier, wherein:
a third input end of the radio frequency transceiver is connected with an output end of the third receiving signal amplifier, an input end of the third receiving signal amplifier is connected with a first end of the third filter, and a second end of the third filter is connected with the third antenna;
The fourth input end of the radio frequency transceiver is connected with the output end of the fourth receiving signal amplifier, the input end of the fourth receiving signal amplifier is connected with the first end of the fourth filter, and the second end of the fourth filter is connected with the fourth antenna;
the third filter is used for filtering the radio frequency signals to obtain a first NR frequency band diversity receiving signal and a first LTE frequency band diversity receiving signal, and the third receiving signal amplifier is used for amplifying the first NR frequency band diversity receiving signal and the first LTE frequency band diversity receiving signal;
the fourth filter is configured to filter the radio frequency signal to obtain a second NR frequency band diversity reception signal and a second LTE frequency band diversity reception signal, and the fourth reception signal amplifier is configured to amplify the second NR frequency band diversity reception signal and the second LTE frequency band diversity reception signal.
4. The circuit of claim 1, wherein the radio frequency front end circuit further comprises a fifth antenna, a fifth filter, and a second transmit signal amplifier, wherein:
the second output end of the radio frequency transceiver is connected with the input end of the second transmitting signal amplifier, the output end of the second transmitting signal amplifier is connected with the first end of the fifth filter, and the second end of the fifth filter is connected with the fifth antenna;
The second transmitting signal amplifier is used for amplifying the first frequency band transmitting signal, and the fifth filter is used for filtering noise in the amplified first frequency band transmitting signal.
5. The circuit of claim 4, wherein the radio frequency front end circuit further comprises: a second switch and a sixth filter, wherein:
the first fixed contact of the second switch is connected with the second end of the fifth filter, and the movable contact of the second switch is connected with the fifth antenna;
the first end of the sixth filter is connected with the output end of the second transmitting signal amplifier, and the second end of the sixth filter is connected with the second stationary contact of the second switch;
the second transmitting signal amplifier is further configured to amplify a second frequency band transmitting signal, and the sixth filter is configured to filter noise in the amplified second frequency band transmitting signal.
6. The circuit of claim 5, wherein the radio frequency front end circuit further comprises a third switch, wherein:
the first fixed contact of the third switch is connected with the input end of the first receiving signal amplifier, the second fixed contact of the third switch is connected with the output end of the second transmitting signal amplifier, and the movable contact of the third switch is connected with the first end of the fifth filter;
The fifth filter is further configured to filter the radio frequency signal to obtain a third frequency band receiving signal, the sixth filter is further configured to filter the radio frequency receiving signal to obtain a fourth frequency band receiving signal, and the first receiving signal amplifier is further configured to amplify the third frequency band receiving signal and the fourth frequency band receiving signal.
7. The circuit of claim 1, wherein the radio frequency front end circuit further comprises a fourth switch and a seventh filter, wherein:
the first fixed contact of the fourth switch is connected with the second end of the first filter, and the movable contact of the fourth switch is connected with the first antenna;
the second stationary contact of the fourth switch is connected with the first end of the seventh filter, and the second end of the seventh filter is connected with the movable contact of the first switch;
the seventh filter is configured to filter the radio frequency signal to obtain a fifth frequency band transceiver signal.
8. The circuit of claim 1, wherein the NR frequency band transmit signal is an N41TX frequency band signal, the first NR frequency band primary set receive signal is an N41 PRX frequency band signal, the LTE frequency band transmit signal is a B41 TX frequency band signal, and the first LTE frequency band primary set receive signal is a B41PRX frequency band signal.
9. An electronic device comprising the radio frequency front-end circuit of any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310432149.6A CN116388793A (en) | 2023-04-20 | 2023-04-20 | Radio frequency front-end circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310432149.6A CN116388793A (en) | 2023-04-20 | 2023-04-20 | Radio frequency front-end circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116388793A true CN116388793A (en) | 2023-07-04 |
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ID=86973251
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310432149.6A Pending CN116388793A (en) | 2023-04-20 | 2023-04-20 | Radio frequency front-end circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116388793A (en) |
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2023
- 2023-04-20 CN CN202310432149.6A patent/CN116388793A/en active Pending
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