CN213367788U - Radio frequency front-end circuit and electronic equipment - Google Patents
Radio frequency front-end circuit and electronic equipment Download PDFInfo
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- CN213367788U CN213367788U CN202022877432.4U CN202022877432U CN213367788U CN 213367788 U CN213367788 U CN 213367788U CN 202022877432 U CN202022877432 U CN 202022877432U CN 213367788 U CN213367788 U CN 213367788U
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Abstract
The application discloses radio frequency front-end circuit and electronic equipment belongs to electronic equipment technical field. The radio frequency front end circuit: the first end of the first switch is connected with the first port of the first radio frequency transceiver, the second end of the first switch is connected with the first port of the second radio frequency transceiver, and the third end of the first switch is connected with the first antenna through the first radio frequency transceiving module; the radio frequency front-end circuit is switched between a first working state and a second working state through a first switch; within a first time range, the first end of the first switch is conducted with the third end of the first switch, and the radio frequency front-end circuit is switched to a first working state; in a second time range, the second end of the first switch is conducted with the third end of the first switch, and the radio frequency front-end circuit is switched to a second working state. The device in the radio frequency front-end circuit is multiplexed through the switch, the radio frequency framework is simplified, the redundancy of the device is reduced, the occupied area of the printed circuit board is greatly reduced, and the cost is saved.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a radio frequency front-end circuit and electronic equipment.
Background
At present, new frequency bands of the fifth generation mobile communication technology (abbreviated as 5G) mainly include n77, n78 and n79, wherein the frequency of n79 is 4400MHz to 5000 MHz.
The WIFI frequency band mainly comprises 2.402 GHz-2.482 GHz and 5150 MHz-5850 MHz (hereinafter referred to as WIFI-5G).
For mainstream 5G terminal technology requirements, N792T 4R is generally satisfied, and Wifi-5G supports UL/DL2 × 2 MIMO. The existing radio frequency architecture of UL/DL2 x 2MIMO meeting the support of N792T 4R and Wifi-5G is complex, occupies a large area of a printed circuit board and has high cost.
SUMMERY OF THE UTILITY MODEL
An object of the embodiments of the present application is to provide a radio frequency front end circuit and an electronic device, which can solve the problems of complex radio frequency architecture, large area occupied by a printed circuit board, and high cost in the existing radio frequency front end circuit for processing radio frequency signals with similar operating frequencies.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a radio frequency front-end circuit, including:
the first radio frequency transceiver, the second radio frequency transceiver, the first switch, the first radio frequency transceiving module and the first antenna;
a first port of the first radio frequency transceiver is connected with a first end of the first switch, a first port of the second radio frequency transceiver is connected with a second end of the first switch, and a third end of the first switch is connected with the first antenna through the first radio frequency transceiver module;
the radio frequency front-end circuit is switched between a first working state and a second working state through the first switch;
in a first time range, a first end of the first switch is conducted with a third end of the first switch, the radio frequency front-end circuit is switched to the first working state, and the first radio frequency transceiver transmits a first signal;
and in a second time range, the second end of the first switch is conducted with the third end of the first switch, the radio frequency front-end circuit is switched to the second working state, the second radio frequency transceiver transmits a second signal, and the first time range is different from the second time range.
In a second aspect, an embodiment of the present application provides an electronic device, including: the radio frequency front-end circuit of the first aspect.
In the embodiment of the application, a first end of a first switch is connected with a first port of a first radio frequency transceiver, a second end of the first switch is connected with a first port of a second radio frequency transceiver, and a third end of the first switch is connected with a first antenna through a first radio frequency transceiving module; the radio frequency front-end circuit is switched between a first working state and a second working state through a first switch; in a first time range, a first end of the first switch is conducted with a third end of the first switch, the radio frequency front-end circuit is switched to a first working state, and the first radio frequency transceiver transmits a first signal; in the second time range, the second end of the first switch is conducted with the third end of the first switch, the radio frequency front-end circuit is switched to the second working state, the second radio frequency transceiver transmits the second signal, the first time range is different from the second time range, and therefore devices in the radio frequency front-end circuit are multiplexed through the switch, the radio frequency framework is simplified, device redundancy is reduced, the occupied area of the printed circuit board is greatly reduced, and cost is saved.
Drawings
FIG. 1 is a schematic diagram of transmission time slots of a signal of n79 band and a signal of Wifi-5G band;
FIG. 2 is a second schematic diagram of transmission time slots of a signal of n79 band and a signal of Wifi-5G band;
FIG. 3 is a schematic diagram of a RF front-end circuit according to the prior art;
fig. 4 is a schematic structural diagram of an rf front-end circuit according to an embodiment of the present disclosure;
fig. 5 is a second schematic diagram of a structure of an rf front-end circuit according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one.
In order to make those skilled in the art better understand the rf front-end circuit of the embodiments of the present application, the following description is made.
For electronic equipment (such as a mobile phone) supporting signal transmission of an n79 frequency band and a Wifi-5G frequency band, because the frequency bands used by the two are close, when the electronic equipment supports the n79 frequency band and supports the Wifi-5G frequency band, signals of the two will interfere with each other without avoiding measures, so that the throughput and the receiving sensitivity are reduced, and even the device fails under severe conditions. The existing filter cannot realize enough isolation in the close frequency part, so that the interference cannot be inhibited by the filter mode, and the evasive processing is generally carried out by adopting a software method.
Now, TDM (Time Divided Mode) is usually adopted, that is, Time slots are completely separated, the operating Time slots of the signal in the n79 frequency band and the signal in the Wifi-5G frequency band are controlled by software to be staggered, the Time is separated according to a certain proportion, one part of the Time slots are used for transmitting the signal in the n79 frequency band, and the other part of the Time slots are used for transmitting the signal in the Wifi-5G frequency band, as shown in fig. 1.
However, in practical design, considering that the TX power of the Wifi signal is much lower than the TX power of the NR signal, when Wifi TX ON is performed, n79 is allowed to receive RX ON, so that it can be ensured that the NR listens continuously downstream, as shown in fig. 2.
For mainstream 5G terminal technology requirements, n 792T 4R is generally satisfied, and Wifi-5G supports uplink UL/downlink DL2 × 2MIMO (its corresponding radio architecture is shown in fig. 3).
Note that, 2T 4R: the terminal supports two paths of Transmission (TX), and the two paths of TX can be switched on two antennas respectively.
The existing radio frequency architecture (as shown in fig. 3) needs 4 PAs (Power amplifiers), 6 LNAs (Low-Noise amplifiers) and 6 antennas, and has a complex architecture, a large PCB area and high cost.
In order to solve the above problem, embodiments of the present application provide a radio frequency front end circuit and an electronic device.
The radio frequency front end circuit provided by the embodiment of the present application will be described in detail through specific embodiments and application scenarios thereof with reference to the accompanying drawings.
Fig. 4 and 5 are schematic structural diagrams of an rf front-end circuit according to an embodiment of the present disclosure. The radio frequency front-end circuit is applied to electronic equipment and can comprise: the radio frequency transceiver comprises a first radio frequency transceiver 1, a second radio frequency transceiver 2, a first switch 3, a first radio frequency transceiving module 4 and a first antenna 5; the first port of the first radio frequency transceiver 1 is connected to the first end of the first switch 3, the first port of the second radio frequency transceiver 2 is connected to the second end of the first switch 3, and the third end of the first switch 3 is connected to the first antenna 5 through the first radio frequency transceiving module 4.
The radio frequency front-end circuit is switched between a first working state and a second working state through the first switch 3; in a first time range, the first terminal of the first switch 3 and the third terminal of the first switch 3 are turned on, the rf front-end circuit is switched to the first working state, and the first rf transceiver 1 transmits a first signal; in a second time range, the second terminal of the first switch 3 is conducted with the third terminal of the first switch 3, the rf front-end circuit is switched to the second operating state, and the second rf transceiver 2 transmits a second signal, where the first time range is different from the second time range.
Here, the first switch 3 is a single-pole double-throw switch.
It should be noted that the rf transceivers (in the embodiment of the present application, the first rf transceiver 1 and the second rf transceiver 2) are used for outputting the TX transmission signal in the uplink and receiving the RX reception signal in the downlink. Here, the radio frequency transceiver is also used to control devices (various switches, transmission/reception modules, and the like) of the radio frequency front end.
Optionally, the first signal is a signal of a first preset frequency band, the second signal is a signal of a second preset frequency band, and a maximum frequency in the first preset frequency band is smaller than a minimum frequency in the second preset frequency band.
That is, the first rf transceiver 1 is used for transmitting signals of a first predetermined frequency band, and the second rf transceiver 2 is used for transmitting signals of a second predetermined frequency band. For example, the first rf transceiver 1 is used to transmit signals in the n79 frequency band, and the second rf transceiver 2 is used to transmit signals in the Wifi-5G frequency band.
In different time ranges, the first radio frequency transceiving module 4 can process signals of different frequency bands, that is, in a first time range, the first radio frequency transceiving module 4 processes a first signal transmitted by the first radio frequency transceiver 1; in a second time range, the first rf transceiver module 4 processes a second signal transmitted by the second rf transceiver 2. The method and the device are suitable for a scene that the transmission time slot of the first signal and the transmission time slot of the second signal are completely staggered. For example, in the case that the first rf transceiver 1 is configured to transmit signals in the n79 frequency band, and the second rf transceiver 2 is configured to transmit signals in the Wifi-5G frequency band, the rf architecture including the rf front-end circuit is suitable for a scenario where the time slots of Wifi and NR are completely staggered.
The radio frequency transceiving module can amplify radio frequency signals, send the amplified radio frequency signals to the antenna, primarily amplify one path of received signals and send the amplified signals to the radio frequency transceiver for processing.
Optionally, the first rf transceiver module 4 includes a first filter 41, a first switch 42, a first low noise amplifier 43, and a first power amplifier 44.
The first filter 41 is connected to the first antenna 5, and the first changeover switch 42 is connected to the first low noise amplifier 43 and the first power amplifier 44, respectively.
Optionally, the first diverter switch 42 is a single pole double throw switch.
Specifically, the first radio frequency transceiver module 4 includes a receiving end and a transmitting end, and the receiving end is connected to the third end of the first switch 3.
Wherein, the rf front-end circuit switches to the first working state, and the first rf transceiver 1 receives the first signal;
the rf front-end circuit is switched to the second operating state, and the second rf transceiver 2 receives the second signal.
Specifically, the receiving end of the first rf transceiver module 4 is connected to the first low noise amplifier 43, and the transmitting end of the first rf transceiver module 4 is connected to the first power amplifier 44.
Based on this, as an optional implementation manner, as shown in fig. 4, the rf front-end circuit according to the embodiment of the present application further includes: a second switch 6; wherein, the second port of the first radio frequency transceiver 1 is connected with the first end of the second switch 6; the second port of the second radio frequency transceiver 2 is connected with the second end of the second switch 6; the transmitting end is connected with the third end of the second switch 6.
The radio frequency front-end circuit is switched between the first working state and the second working state through the first switch 3 and the second switch 6; in a first time range, the first terminal of the first switch 3 is conducted with the third terminal of the first switch 3, and the first terminal of the second switch 6 is conducted with the third terminal of the second switch 6, and the first rf transceiver 1 receives the first signal through the first switch 3 or transmits the first signal through the second switch 6; in a second time range, the second terminal of the first switch 3 is conducted with the third terminal of the first switch 3, and the second terminal of the second switch 6 is conducted with the third terminal of the second switch 6, and the second rf transceiver 2 receives the second signal through the first switch 3, or sends the second signal through the second switch 6.
Here, the second switch 6 is a single-pole double-throw switch.
In this implementation manner, in different time ranges, the first radio frequency transceiver module 4 can process signals of different frequency bands, that is, in a first time range, the first radio frequency transceiver module 4 processes a first signal sent or received by the first radio frequency transceiver 1; in a second time range, the first rf transceiver module 4 processes a second signal transmitted or received by the second rf transceiver 2.
In order to implement the second signal, i.e. the UL/DL2 × 2MIMO of the signal in the second preset frequency band, for example, the UL/DL2 × 2MIMO of the signal in the Wifi-5G frequency band, as an optional implementation manner, the rf front-end circuit in the embodiment of the present application may further include: a third switch 7, a fourth switch 8, a third rf transceiver module 9 and a third antenna 10.
The third port of the first radio frequency transceiver 1 is connected to the first end of the third switch 7, the third port of the second radio frequency transceiver 2 is connected to the second end of the third switch 7, and the third end of the third switch 7 is connected to the third antenna 10 through the third radio frequency transceiving module 9.
The fourth port of the first radio frequency transceiver 1 is connected to the first end of the fourth switch 8, the fourth port of the second radio frequency transceiver 2 is connected to the second end of the fourth switch 8, and the third end of the fourth switch 8 is connected to the third antenna 10 through the third radio frequency transceiver module 9.
Wherein the radio frequency front-end circuit is switched between the first working state and the second working state through the first switch 3, the second switch 6, the third switch 7 and the fourth switch 8; in a first time range, the first terminal of the first switch 3 is conducted with the third terminal of the first switch 3, the first terminal of the second switch 6 is conducted with the third terminal of the second switch 6, the first terminal of the third switch 7 is conducted with the third terminal of the third switch 7, and the first terminal of the fourth switch 8 is conducted with the third terminal of the fourth switch 8, so that the first radio frequency transceiver 1 receives a first signal through the first switch 3 and/or the third switch 7, or sends a first signal through the second switch 6 and/or the fourth switch 8; in a second time range, the second terminal of the first switch 3 is conducted with the third terminal of the first switch 3, the second terminal of the second switch 6 is conducted with the third terminal of the second switch 6, the second terminal of the third switch 7 is conducted with the third terminal of the third switch 7, and the second terminal of the fourth switch 8 is conducted with the third terminal of the fourth switch 8, and the second rf transceiver 2 receives a second signal through the first switch 3 and/or the third switch 7, or sends a second signal through the second switch 6 and/or the fourth switch 8.
Specifically, the third terminal of the third switch 7 is connected to the receiving terminal of the third rf transceiving module 9, and the third terminal of the fourth switch 8 is connected to the transmitting terminal of the third rf transceiving module 9.
Here, the third switch 7 is a single-pole double-throw switch. The fourth switch 8 is a single pole double throw switch.
Based on this, the first port of the second rf transceiver 2 is used as the first receiving port, the second port of the second rf transceiver 2 is used as the first transmitting port, the third port of the second rf transceiver 2 is used as the second receiving port, and the fourth port of the second rf transceiver 2 is used as the second transmitting port. Thus, based on the rf front-end circuit, UL/DL2 × 2MIMO of the second signal, i.e., the signal of the second predetermined frequency band, can be realized.
Optionally, the third rf transceiver module 9 includes a second filter 91, a second switch 92, a second low noise amplifier 93 and a second power amplifier 94.
The second filter 91 is connected to the third antenna 10, and the second switch 92 is connected to the second low noise amplifier 93 and the second power amplifier 94, respectively.
Optionally, the second switch 92 is a single pole double throw switch.
Here, the receiving end of the third radio frequency transceiver module 9 is connected to the second low noise amplifier 93, and the transmitting end of the third radio frequency transceiver module 9 is connected to the second power amplifier 94.
Further, to implement the first signal, that is, the 2T4R of the signal in the first preset frequency band, the rf front-end circuit according to the embodiment of the present application may further include: a first rf receiving module 11, a second rf receiving module 12, a fourth antenna 13 and a fifth antenna 14.
The first rf receiving module 11 is respectively connected to the first rf transceiver 1 and the fourth antenna 13; the second rf receiving module 12 is connected to the first rf transceiver 1 and the fifth antenna 14, respectively, and both the first rf receiving module 11 and the second rf receiving module 12 are configured to process a first signal.
Optionally, the first rf receiving module 11 includes: a third filter 111 and a third low noise amplifier 112; the third filter 111 is connected to the fourth antenna 13 and the third low noise amplifier 112, respectively, and the third low noise amplifier 112 is connected to the first radio frequency transceiver 1.
The second rf receiving module 12 includes: a fourth filter 121 and a fourth low noise amplifier 122; the fourth filter 121 is connected to the fifth antenna 14 and the fourth low noise amplifier 122, respectively, and the fourth low noise amplifier 122 is connected to the first radio frequency transceiver 1.
The signal frequency band that can be processed by the devices included in the first rf receiving module 11 and the second rf receiving module 12 is only the first preset frequency band.
It should be noted that, in this implementation manner, the 2T4R of the signal of the first preset frequency band and the UL/DL2 x 2MIMO of the signal of the second preset frequency band can be implemented, and by introducing 4 SPDT (single pole double throw) switches (the first switch 3, the second switch 6, the third switch 7, and the fourth switch 8), multiplexing of the devices of the rf front-end circuit is implemented, that is, the rf front-end for transmitting the signal of the second preset frequency band shares the rf front-end of the signal of the first preset frequency band (specifically, in the case that the first rf transceiver 1 is used for transmitting the signal of the n79 frequency band and the second rf transceiver 2 is used for transmitting the signal of the Wifi-5G frequency band, the rf front-end for transmitting the signal of the Wifi-5G frequency band shares the rf front-end of the signal of the n79 frequency band), compared with the existing rf architecture in fig. 3, device redundancy is reduced, and specifically, two PAs are reduced, Two LNAs and two antennas, thereby the occupation area of the printed circuit board is greatly reduced, and the cost is saved.
Based on that the first rf transceiver module 4 includes a receiving end and a transmitting end, the receiving end is connected to the rf front-end circuit of the third end of the first switch 3, as another optional implementation manner, as shown in fig. 5, the transmitting end is connected to the second rf transceiver 2; in the second time range, the second terminal of the first switch 3 is conducted with the third terminal of the first switch 3, the rf front-end circuit is switched to the second operating state, and the second rf transceiver 2 receives the second signal through the first switch 3, or the second rf transceiver 2 sends the second signal.
Further, the embodiment of the present application further includes: a second rf transceiver module 15 and a second antenna 16; the first radio frequency transceiver 1 is connected with the second antenna 16 through the second radio frequency transceiver module 15; in the second time range, the first rf transceiver 1 receives the first signal through the second rf transceiver module 15.
The implementation manner is suitable for a scenario where a second signal, that is, a signal in a second preset frequency band exists in a signal transmission time slot (a second time range) in which a first signal, that is, a signal in a first preset frequency band, is received. For example, in the case that the first rf transceiver 1 is configured to transmit signals in the n79 frequency band, and the second rf transceiver 2 is configured to transmit signals in the Wifi-5G frequency band, the rf architecture including the rf front-end circuit is suitable for a scenario where NR Rx exists in a Wifi timeslot.
In order to implement the second signal, i.e. the UL/DL2 × 2MIMO of the signal in the second preset frequency band, for example, the UL/DL2 × 2MIMO of the signal in the Wifi-5G frequency band, as an optional implementation manner, the rf front-end circuit in the embodiment of the present application may further include: a fifth switch 17, a fourth rf transceiver module 18 and a sixth antenna 19.
The fifth port of the first radio frequency transceiver 1 is connected to the first end of the fifth switch 17, the fifth port of the second radio frequency transceiver 2 is connected to the second end of the fifth switch 17, and the third end of the fifth switch 17 is connected to the sixth antenna 19 through the fourth radio frequency transceiver module 18.
Wherein the radio frequency front end circuit is switched between the first working state and the second working state through a first switch 3 and a fifth switch 17; in a first time range, the first terminal of the first switch 3 is conducted with the third terminal of the first switch 3, and the first terminal of the fifth switch 17 is conducted with the third terminal of the fifth switch 17, and the first rf transceiver 1 receives a first signal through the first switch 3 or the fifth switch 17; in a second time range, the second terminal of the first switch 3 is conducted with the third terminal of the first switch 3, and the second terminal of the fifth switch 17 is conducted with the third terminal of the fifth switch 17, and the second rf transceiver 2 receives a second signal through the first switch 3 or the fifth switch 17, or the second rf transceiver 2 transmits the second signal.
Specifically, the receiving end of the fourth rf transceiver module 18 is connected to the third end of the fifth switch 17, and the transmitting end of the fourth rf transceiver module 18 is connected to the second rf transceiver 2.
Optionally, the fourth rf transceiver module 18 includes a fifth filter 181, a fifth switch 182, a fifth low noise amplifier 183, and a fifth power amplifier 184.
The fifth filter 181 is connected to the sixth antenna 19, and the fifth switch 182 is connected to the fifth low noise amplifier 183 and the fifth power amplifier 184, respectively.
Optionally, the fifth switch 182 is a single pole double throw switch.
Based on the rf front-end circuit, UL/DL2 × 2MIMO of the second signal, i.e., the signal in the second predetermined frequency band, can be implemented. The radio frequency front-end circuit can only realize two-path reception of a first signal, namely a signal of a first preset frequency band.
Further, to implement the first signal, that is, the 2T4R of the signal in the first preset frequency band, the rf front-end circuit according to the embodiment of the present application may further include: a third rf transceiver module 20, a fourth rf transceiver module 21, a seventh antenna 22 and an eighth antenna 23.
The third rf transceiving module 20 is connected to the first rf transceiver 1 and the seventh antenna 22, the fourth rf transceiving module 21 is connected to the first rf transceiver 1 and the eighth antenna 23, and both the third rf transceiving module 20 and the fourth rf transceiving module 21 are configured to process the first signal.
Optionally, the third rf transceiver module 20 includes a fifth filter 201, a third switch 202, a fifth low noise amplifier 203 and a third power amplifier 204.
The fifth filter 201 is connected to the seventh antenna 22, and the third switch 202 is connected to the fifth low noise amplifier 203 and the third power amplifier 204, respectively. Here, the first radio frequency transceiver 1 is connected to the fifth low noise amplifier 203 and the third power amplifier 204, respectively.
Optionally, the third switch 202 is a single pole double throw switch.
Optionally, the fourth rf transceiver module 21 includes a sixth filter 211, a fourth switch 212, a sixth low noise amplifier 213 and a fourth power amplifier 214.
The sixth filter 211 is connected to the eighth antenna 23, and the fourth switch 212 is connected to the sixth low noise amplifier 213 and the fourth power amplifier 214, respectively. Here, the first radio frequency transceiver 1 is connected to the sixth low noise amplifier 213 and the fourth power amplifier 214, respectively.
Optionally, the fourth switch 212 is a single pole double throw switch.
Here, in the second time range, the second terminal of the first switch 3 is conducted with the third terminal of the first switch 3, and the second terminal of the fifth switch 17 is conducted with the third terminal of the fifth switch 17, at this time, since the third rf transceiver module 20 is respectively connected to the first rf transceiver 1 and the seventh antenna 22; the fourth rf transceiving module 21 is connected to the first rf transceiver 1 and the eighth antenna 23, respectively, and both the third rf transceiving module 20 and the fourth rf transceiving module 21 are configured to process the first signal. I.e. the first signal can be received at the same time, ensuring uninterrupted listening of the first signal.
In a first time range, the first end of the first switch 3 is conducted with the third end of the first switch 3, and the first end of the fifth switch 17 is conducted with the third end of the fifth switch 17, so that the connection between the radio frequency front end and the first radio frequency transceiver 1 is realized, and the uplink and downlink transmission of the first signal is realized.
For example, when the first radio frequency transceiver 1 is configured to transmit signals in the n79 frequency band and the second radio frequency transceiver 2 is configured to transmit signals in the Wifi-5G frequency band, the above state can implement uplink and downlink transmission of signals in the n79 frequency band.
Here, the signal frequency bands that can be processed by the devices included in the first rf transceiver module 4 and the second rf transceiver module 15 cover the first preset frequency band and the second preset frequency band, that is, both the signal processing of the first preset frequency band and the signal processing of the second preset frequency band are satisfied.
It should be noted that, the implementation can implement 2T4R of the signal (first signal) in the first preset frequency band and UL/DL2 × 2MIMO of the signal in the second preset frequency band (second signal), by introducing 2 SPDT (single pole double throw) switches (the first switch 3 and the fifth switch 17), thereby implementing multiplexing of the devices of the rf front-end circuit, that is, implementing that the two rf signal receiving paths of the rf front-end of the signal in the first preset frequency band share the rf signal receiving path of the rf front-end of the signal in the second preset frequency band (specifically, in the case that the first rf transceiver 1 is used for transmitting the signal in the n79 frequency band and the second rf transceiver 2 is used for transmitting the signal in the Wifi-5G frequency band, implementing that the LNA path of the LNA of the n79 shares the Wifi 5G), thereby greatly reducing the occupied area of the printed circuit board and saving the cost.
It should be noted that the radio frequency front end circuit in the embodiment of the present application is also applicable to the case where the first radio frequency transceiver 1 is used for transmitting signals in the n41 frequency band, and the second radio frequency transceiver 2 is used for transmitting signals in the Wifi-2.4G frequency band, which is not described herein again.
The radio frequency front-end circuit of the embodiment of the application is connected with a first port of a first radio frequency transceiver through a first end of a first switch, a second end of the first switch is connected with a first port of a second radio frequency transceiver, and a third end of the first switch is connected with a first antenna through a first radio frequency transceiving module; the radio frequency front-end circuit is switched between a first working state and a second working state through a first switch; in a first time range, a first end of the first switch is conducted with a third end of the first switch, the radio frequency front-end circuit is switched to a first working state, and the first radio frequency transceiver transmits a first signal; in the second time range, the second end of the first switch is conducted with the third end of the first switch, the radio frequency front-end circuit is switched to the second working state, the second radio frequency transceiver transmits the second signal, the first time range is different from the second time range, and therefore devices in the radio frequency front-end circuit are multiplexed through the switch, the radio frequency framework is simplified, device redundancy is reduced, the occupied area of the printed circuit board is greatly reduced, and cost is saved.
An embodiment of the present application further provides an electronic device, including the radio frequency front end circuit according to the foregoing embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A radio frequency front end circuit, comprising: the first radio frequency transceiver, the second radio frequency transceiver, the first switch, the first radio frequency transceiving module and the first antenna;
a first port of the first radio frequency transceiver is connected with a first end of the first switch, a first port of the second radio frequency transceiver is connected with a second end of the first switch, and a third end of the first switch is connected with the first antenna through the first radio frequency transceiver module;
the radio frequency front-end circuit is switched between a first working state and a second working state through the first switch;
in a first time range, a first end of the first switch is conducted with a third end of the first switch, the radio frequency front-end circuit is switched to the first working state, and the first radio frequency transceiver transmits a first signal;
and in a second time range, the second end of the first switch is conducted with the third end of the first switch, the radio frequency front-end circuit is switched to the second working state, the second radio frequency transceiver transmits a second signal, and the first time range is different from the second time range.
2. The rf front-end circuit according to claim 1, wherein the first rf transceiver module comprises a receiving end and a transmitting end, the receiving end is connected to the third end of the first switch;
the radio frequency front-end circuit is switched to the first working state, and the first radio frequency transceiver receives the first signal;
the radio frequency front-end circuit is switched to the second working state, and the second radio frequency transceiver receives the second signal.
3. The rf front-end circuit of claim 2, further comprising: a second switch;
wherein the second port of the first radio frequency transceiver is connected with the first end of the second switch; the second port of the second radio frequency transceiver is connected with the second end of the second switch; the transmitting end is connected with a third end of the second switch;
the radio frequency front-end circuit is switched between the first working state and the second working state through the first switch and the second switch;
in a first time range, a first terminal of the first switch is conducted with a third terminal of the first switch, a first terminal of the second switch is conducted with a third terminal of the second switch, and the first radio frequency transceiver receives the first signal through the first switch or sends the first signal through the second switch;
in a second time range, the second terminal of the first switch is conducted with the third terminal of the first switch, the second terminal of the second switch is conducted with the third terminal of the second switch, and the second rf transceiver receives the second signal through the first switch or transmits the second signal through the second switch.
4. The rf front-end circuit according to claim 2, wherein the transmitting end is connected to the second rf transceiver;
in the second time range, the second terminal of the first switch is conducted with the third terminal of the first switch, the rf front-end circuit is switched to the second operating state, and the second rf transceiver receives the second signal through the first switch, or the second rf transceiver transmits the second signal.
5. The RF front-end circuit of claim 4, further comprising: the second radio frequency transceiving module and the second antenna;
the first radio frequency transceiver is connected with the second antenna through the second radio frequency transceiver module;
and in the second time range, the first radio frequency transceiver receives the first signal through the second radio frequency transceiver module.
6. The rf front-end circuit of claim 1, wherein the first signal is a signal in a first predetermined frequency band, the second signal is a signal in a second predetermined frequency band, and a maximum frequency in the first predetermined frequency band is smaller than a minimum frequency in the second predetermined frequency band.
7. An electronic device comprising the radio frequency front end circuit according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202022877432.4U CN213367788U (en) | 2020-12-02 | 2020-12-02 | Radio frequency front-end circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022877432.4U CN213367788U (en) | 2020-12-02 | 2020-12-02 | Radio frequency front-end circuit and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489499A (en) * | 2021-07-23 | 2021-10-08 | 维沃移动通信有限公司 | Radio frequency architecture and electronic device |
| CN115051726A (en) * | 2022-05-26 | 2022-09-13 | Oppo广东移动通信有限公司 | Radio frequency front-end module and electronic equipment |
-
2020
- 2020-12-02 CN CN202022877432.4U patent/CN213367788U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489499A (en) * | 2021-07-23 | 2021-10-08 | 维沃移动通信有限公司 | Radio frequency architecture and electronic device |
| CN115051726A (en) * | 2022-05-26 | 2022-09-13 | Oppo广东移动通信有限公司 | Radio frequency front-end module and electronic equipment |
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