CN112491434A - Radio frequency front-end circuit, radio frequency signal receiving method, communication method and communication equipment - Google Patents
Radio frequency front-end circuit, radio frequency signal receiving method, communication method and communication equipment Download PDFInfo
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- CN112491434A CN112491434A CN201910768372.1A CN201910768372A CN112491434A CN 112491434 A CN112491434 A CN 112491434A CN 201910768372 A CN201910768372 A CN 201910768372A CN 112491434 A CN112491434 A CN 112491434A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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Abstract
The application discloses a radio frequency front-end circuit, a radio frequency signal receiving method, a communication method and a communication device, wherein the communication device comprises an antenna, a radio frequency front-end circuit and a transceiver, and the antenna is used for receiving radio frequency signals; the radio frequency front-end circuit comprises a radio frequency switch circuit and a first amplifying circuit connected with the radio frequency switch circuit, the radio frequency switch circuit is connected with the antenna, the radio frequency switch circuit is used for processing radio frequency signals, and the first amplifying circuit is used in a transmitting link; the transceiver is respectively connected with the first amplifying circuit and the radio frequency switch circuit and is used for receiving the processed radio frequency signal sent by the radio frequency switch circuit. By means of the method, the receiving link can be shortened, the path loss is reduced, and the efficiency is improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a radio frequency front end circuit, a radio frequency signal receiving method, a communication method, and a device.
Background
At present, in a receiving link of a communication device, an antenna sends a received radio frequency signal to a radio frequency switch module, because a receiving port and a transmitting port of a radio frequency transceiver are different, the radio frequency switch module needs to send the radio frequency signal to a switch inside an amplification module for path switching, and a CPU (Central Processing Unit) controls the switch in the amplification module to be turned on, so that the radio frequency signal is transmitted to the radio frequency transceiver.
However, the receiving link is switched by using a switch inside the amplifying module, so that the radio frequency receiving link is relatively long, and insertion loss is caused by the introduction of the amplifying module, so that the total loss ratio of the receiving link is relatively high, and the receiving sensitivity is relatively poor; meanwhile, the transmitting link and the receiving link both need to use the amplifying modules, so that the amplifying modules are high in utilization rate, large in burden and large in heat productivity.
Disclosure of Invention
The present application mainly solves the problem of providing a radio frequency front end circuit, a radio frequency signal receiving method, a communication method, and a device, which can shorten a receiving link, reduce path loss, and improve efficiency.
In order to solve the technical problem, the technical scheme adopted by the application is as follows: there is provided a communication device including: the antenna is used for receiving radio frequency signals; the radio frequency front-end circuit comprises a radio frequency switch circuit and a first amplifying circuit connected with the radio frequency switch circuit, the radio frequency switch circuit is connected with the antenna, the radio frequency switch circuit is used for processing radio frequency signals, and the first amplifying circuit is used in a transmitting link; the transceiver is respectively connected with the first amplifying circuit and the radio frequency switch circuit and is used for receiving the processed radio frequency signal sent by the radio frequency switch circuit.
In order to solve the above technical problem, another technical solution adopted by the present application is: the radio frequency front-end circuit comprises a radio frequency switch circuit and a first amplifying circuit connected with the radio frequency switch circuit, wherein the radio frequency switch circuit is the radio frequency front-end circuit, and the first amplifying circuit is the first amplifying circuit.
In order to solve the above technical problem, another technical solution adopted by the present application is: the method is applied to communication equipment, the communication equipment comprises an antenna, a radio frequency front-end circuit and a transceiver which are sequentially connected, the radio frequency front-end circuit comprises a radio frequency switch circuit and a first amplifying circuit connected with the radio frequency switch circuit, and the method comprises the following steps: the antenna receives the radio frequency signal and sends the radio frequency signal to the radio frequency switch circuit; the radio frequency switch circuit processes the radio frequency signal and sends the processed radio frequency signal to a receiver; the transceiver receives the processed radio frequency signal output by the radio frequency switch circuit.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a communication method applied to a communication device including an antenna, a radio frequency front end circuit and a transceiver connected in sequence, the radio frequency front end circuit including a radio frequency switch circuit and a first amplification circuit connected to the radio frequency switch circuit, the method including: in a receiving time slot, an antenna receives a radio frequency signal and sends the radio frequency signal to a radio frequency switch circuit; the radio frequency switch circuit processes the radio frequency signal and sends the processed radio frequency signal to a receiver; the transceiver receives the processed radio frequency signal output by the radio frequency switch circuit; in a transmitting time slot, the transceiver receives the intermediate frequency signal, modulates the intermediate frequency signal, generates a first high frequency signal and sends the first high frequency signal to the first amplifying circuit; the first amplifying circuit amplifies the first high-frequency signal to generate a radio-frequency signal, and the radio-frequency signal is sent to the antenna through the radio-frequency switch circuit.
Through the scheme, the beneficial effects of the application are that: the radio frequency switch circuit in the radio frequency front-end circuit is respectively connected with the antenna and the transceiver, the antenna transmits the received radio frequency signal to the radio frequency switch circuit, the radio frequency switch circuit directly outputs the radio frequency signal to the transceiver, the radio frequency switch circuit is prevented from transmitting the radio frequency signal to the transceiver through the switch in the first amplifying circuit when the radio frequency signal is received, and the radio frequency switch circuit can shorten a receiving link, reduce the path loss caused by the first amplifying circuit and contribute to improving the receiving efficiency because the radio frequency switch circuit does not need to pass through the first amplifying circuit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of a communication device provided in the present application;
fig. 2 is a schematic structural diagram of another embodiment of a communication device provided in the present application;
fig. 3 is a schematic structural diagram of a multi-way rf switch in another embodiment of the communication device provided in the present application;
fig. 4 is a schematic structural diagram of an embodiment of an rf front-end circuit provided in the present application;
fig. 5 is a schematic flowchart of an embodiment of a radio frequency signal receiving method provided in the present application;
fig. 6 is a flowchart illustrating a communication method according to an embodiment of the present application.
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 only a part of the embodiments of the present application, and not all the embodiments. 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a communication device provided in the present application, where the communication device includes: an antenna 10, radio frequency front end circuitry 20 and a transceiver 30.
The antenna 10 is used for receiving radio frequency signals; specifically, the antenna 10 has a receiving frequency band, the antenna 10 can receive radio frequency signals within the receiving frequency band, and the antenna 10 cannot receive signals outside the receiving frequency band; for example, the receiving frequency band is 200-300 MHz, the antenna 10 can receive 220MHz signals, but cannot receive 180MHz signals.
The rf front-end circuit 20 includes an rf switch circuit 21 and a first amplifier circuit 22 connected to the rf switch circuit 21; in the receiving link, the radio frequency switch circuit 21 is connected with the antenna 10, and the radio frequency switch circuit 21 is used for processing the received radio frequency signal and sending the processed radio frequency signal to the transceiver 30 to complete the reception of the radio frequency signal; the first amplifying circuit 22 is used in a transmitting link, and is connected to a transmitting end of the transceiver 30, specifically, the first amplifying circuit 22 is configured to amplify a signal to be transmitted output by the transceiver 30, and output the amplified signal to the antenna 10 through the radio frequency switch circuit 21.
The transceiver 30 is respectively connected to the rf switch circuit 21 and the first amplifying circuit 22, and is configured to receive the processed rf signal sent by the rf switch circuit 21; the transceiver 30 may be a radio frequency transceiver, and has a transmitting end and a receiving end, the receiving end of the transceiver 30 is used for receiving the radio frequency signal transmitted from the antenna 10 through the radio frequency switch circuit 21, and the transmitting end of the transceiver 30 is used for transmitting the radio frequency signal to the antenna 10.
Different from the prior art, the present application provides a communication device, when in a receiving time slot, the antenna 10 transmits a radio frequency signal to the radio frequency switch circuit 21, the radio frequency switch circuit 21 outputs the radio frequency signal to the transceiver 30, so as to avoid that the radio frequency switch circuit 21 needs to transmit the radio frequency signal to the transceiver 30 through a switch in the first amplifying circuit 22 when receiving the radio frequency signal, and since the radio frequency signal does not need to pass through the first amplifying circuit 22, a receiving link can be shortened, a path loss caused by the first amplifying circuit 22 is reduced, and the receiving efficiency is improved.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another embodiment of a communication device provided in the present application, where the communication device includes: an antenna 10, radio frequency front end circuitry 20, a transceiver 30, and a processor 40.
The rf switch circuit 21 includes a switch 211, the switch 211 is respectively connected to the first amplifying circuit 22, the transceiver 30 and the antenna 10, and the rf switch circuit 21 is configured to conduct a path between the antenna 10 and the transceiver 30. Specifically, in the receiving time slot, the switch 211 turns on the circuit between the antenna 10 and the transceiver 30, and the signal output by the antenna 10 is transmitted to the transceiver 30 through the switch 211; in a transmission time slot, the switch 211 conducts the circuit between the first amplifying circuit 22 and the antenna 10, and a signal output by the first amplifying circuit 22 is transmitted to the antenna 10 through the switch 211.
Further, the switch 211 is a multi-channel rf switch, as shown in fig. 3, the multi-channel rf switch at least includes a control terminal, a first terminal, a second terminal, a third terminal, a fourth terminal and a fifth terminal, the first terminal is connected to the output terminal of the first amplifying circuit 22, the second terminal is connected to the antenna 10, and the third terminal is connected to the receiving terminal of the transceiver 30; in the receiving time slot, the second end and the third end of the multi-channel radio frequency switch are conducted; and in the transmitting time slot, the first end/the fourth end of the multi-path radio frequency switch is conducted with the second end.
In a specific embodiment, a field effect transistor T1 is disposed between the first terminal and the second terminal of the multi-channel rf switch, the gate of the field effect transistor T1 is connected to the control terminal, and the drain and the gate of the field effect transistor T1 are connected to the first terminal and the second terminal, respectively; a field effect transistor T2 is arranged between the second end and the third end, the grid electrode of the field effect transistor T2 is connected with the control end, and the drain electrode and the source electrode of the field effect transistor T2 are respectively the second end and the third end; the grid electrode of the field effect transistor T3 is connected with the control end, and the drain electrode and the source electrode of the field effect transistor T3 are a fourth end and a second end respectively; the gate of the fet T4 is connected to the control terminal, and the drain and source of the fet T4 are the first terminal and the fifth terminal, respectively.
The processor 40 is respectively connected with the transceiver 30 and the control end of the multi-path radio frequency switch, and the processor 40 is used for sending a control signal to the radio frequency switch 211; specifically, the Processor 40 may be a baseband chip, and the Processor 40 is connected to the multi-channel rf switch through an Interface line (MIPI) of the Mobile Industry Processor 40; in the receiving time slot, the processor 40 sends a control signal to the multi-way rf switch through the MIPI line to control the multi-way rf switch to be closed or opened.
In one embodiment, the processor 40 is configured to scan signals, detect the signal with the strongest signal strength from the scanned received signals, record the signal with the strongest signal strength as the rf signal, and send a control signal to control the multi-way rf switch to close, so as to conduct the path between the antenna 10 and the transceiver 30.
The rf front-end circuit 20 further includes a filter and a Low Noise Amplifier (not shown in the figure) connected to the filter, the filter is connected to a third end of the multi-channel rf switch, the filter is configured to filter the rf signal and send the filtered rf signal to a Low Noise Amplifier (LNA), and the filter may be an rf filter; the low noise amplifier is connected to the receiving end of the transceiver 30, and the low noise amplifier is configured to amplify the signal output by the filter and output the amplified radio frequency signal to the receiving end of the transceiver 30.
Since the receiving end and the transmitting end of the transceiver 30 are different, the path is switched by the multi-path radio frequency switch, and the radio frequency signal is transmitted from the receiving link to the transceiver 30; in the receiving time slot, the rf signal is transmitted from the antenna 10 to the rf switch circuit 21, and then transmitted from the rf switch circuit 21 to the transceiver 30, so as to complete the reception of the rf signal from the antenna 10, then switched to the multi-channel rf switch, and then transmitted to the transceiver 30, thereby completing the reception of the rf signal.
In a transmission timeslot, the processor 40 is configured to send an intermediate frequency signal to the transceiver 30, and specifically, in the transmission timeslot, the processor 40 is configured to receive an analog signal sent by an external device, perform frequency mixing processing on the analog signal to generate an intermediate frequency signal, and send the intermediate frequency signal to an input end of the transceiver 30 in the transmission timeslot; in particular, the external device may be a microphone, which may send audio signals to the processor 40 for processing.
The transceiver 30 is configured to modulate the intermediate frequency signal to generate a first high frequency signal, and send the first high frequency signal to the first amplifying circuit 22, where the first amplifying circuit 22 is configured to amplify the first high frequency signal to generate a radio frequency signal, and send the radio frequency signal to the multiple radio frequency switches; the first high Frequency signal may be a 3G/4G signal, the first Amplifier circuit 22 may be a Power Amplifier (PA), and the first Amplifier circuit 22 may operate in WCDMA (Wide band Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), LTE-TDD (Long Term Evolution Time Division duplex), FDD-LTE (Long Term Evolution-Frequency Division duplex), or the like.
The multi-path radio frequency switch is also used for conducting a link between the antenna 10 and the first amplifying circuit 22; specifically, the processor 40 sends a control signal to the multi-path rf switch through the MIPI line, and when the multi-path rf switch receives the control signal sent by the processor 40, a first terminal and a second terminal of the multi-path rf switch are turned on to send the rf signal to the antenna 10.
The radio frequency switch circuit 21 further includes a second amplifying circuit 212, the second amplifying circuit 212 is respectively connected to the transmitting end of the transceiver 30 and the fourth end of the multi-channel radio frequency switch, and the second amplifying circuit 212 is configured to amplify a second high frequency signal transmitted by the transceiver 30, generate a radio frequency signal, and transmit the radio frequency signal to the antenna 10 through the multi-channel radio frequency switch; the second high frequency signal may be a 2G signal, the second amplifier circuit 212 may be a power amplifier, and the second amplifier circuit 212 operates in a GSM (Global System for Mobile Communications) mode or a CDMA (Code Division Multiple Access).
In addition, the rf switch circuit 21 is further configured to feed back a part of the rf signal to the transceiver 30, and in the transmitting chain, the transceiver 30, the rf switch circuit 21 and the first amplifying circuit 22 form a closed loop to adjust the power of the rf signal.
Further, the transmitting end of the transceiver 30 is connected to the fifth end of the multi-path rf switch, the transceiver 30 sends the first high frequency signal to the first amplifying circuit 22, the first amplifying circuit outputs the rf signal to the rf switch circuit 21, the processor 40 outputs a control signal to the control end of the multi-path rf switch, the fets T1 and T4 in the multi-path rf switch are turned on, the first end of the multi-path rf switch is connected to the transceiver 30 through the fifth end to feed back the rf signal to the transceiver 30, an attenuator (not shown in the figure) may be further disposed between the multi-path rf switch and the transceiver 30, the attenuator is configured to attenuate the rf signal received by the multi-path rf switch and feed back the attenuated rf signal to the transceiver 30, and when the transceiver 30 detects that the power of the fed back rf signal is relatively high, the power of the first high frequency signal output by the transceiver 30 is reduced; when detecting that the power of the fed back radio frequency signal is small, the transceiver 30 increases the power of the first high frequency signal output by the transceiver to realize dynamic adjustment of the power of the signal; or when the transceiver 30 detects that the power of the fed back rf signal is not satisfactory, the transceiver linearly combines the output first high frequency signal with the fed back rf signal, so as to achieve the purpose of reducing/increasing the power of the signal output by the transceiver 30, thereby satisfying the transmission power requirement.
In the transmission timeslot, the transmitting end of the transceiver 30 outputs a first high-frequency signal to the first amplifying circuit 22, the first amplifying circuit 22 outputs a radio frequency signal to the multi-path radio frequency switch, and the multi-path radio frequency switch outputs a radio frequency signal to the antenna 10; or the transmitting end of the transceiver 30 outputs the second high frequency signal to the second amplifying circuit 212, the second amplifying circuit 212 outputs the radio frequency signal to the multi-channel radio frequency switch, and the multi-channel radio frequency switch outputs the radio frequency signal to the antenna 10, thereby completing the transmission of the radio frequency signal.
The communication equipment in the application can be applied to mobile 4G communication, particularly can be applied to intelligent equipment such as a mobile phone, a tablet or a damaged hand and can also be applied to vehicle-mounted telephones and network communication; the switch in the second amplifying circuit 212 is abandoned, and the multi-path radio frequency switch in the radio frequency switch circuit 21 is used for replacing the switch in the second amplifying circuit 212; since the switch inside the second amplifying circuit 212 is not used by the receiving link, the switch 211 may not be set when the second amplifying circuit 212 is designed, so as to be idle and waste resources; in the receiving time slot, because the preposed multi-channel radio frequency switch is used for transmitting the radio frequency signal to the transceiver 30, the received radio frequency signal does not need to pass through the postpositional first amplifying circuit 22, the circuit from the first amplifying circuit 22 to the transceiver 30 can be omitted, the receiving link is shortened, the path loss can be greatly reduced, the efficiency is improved, the radio frequency receiving sensitivity is improved, the system performance is improved, the utilization rate of the postpositional first amplifying circuit 22 can be reduced, the heat productivity is further reduced, and the service life of the first amplifying circuit 22 is prolonged.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of an rf front-end circuit provided in the present application, and the rf front-end circuit 20 includes an rf switch circuit 21 and a first amplifying circuit 22 connected to the rf switch circuit 21.
The input end of the rf switch circuit 21 is connected to the output end of the first amplifying circuit 22, the first output end of the rf switch circuit 21 is connected to an antenna (not shown in the figure), the second output end of the rf switch circuit 21 is connected to the receiving end (not shown in the figure) of the transceiver, and the rf switch circuit 21 is the rf switch circuit in the above embodiment; the input terminal of the first amplifying circuit 22 is connected to the transmitting terminal of the transceiver, and is used for receiving the signal from the transmitting terminal of the transceiver, and the first amplifying circuit 22 is the first amplifying circuit in the above-mentioned embodiment.
When receiving the rf signal transmitted by the antenna, the rf front-end circuit 20 in the present application directly outputs the rf signal from the second output terminal of the rf switch circuit 21 to the transceiver without passing through the first amplifier circuit 22, so as to shorten the transmission path of the rf signal and reduce the path loss.
Referring to fig. 1 and fig. 5, fig. 5 is a schematic flowchart of an embodiment of a radio frequency signal receiving method provided by the present application, where the method is applied to a communication device, the communication device includes an antenna 10, a radio frequency front-end circuit 20 and a transceiver 30, which are connected in sequence, the radio frequency front-end circuit 20 includes a radio frequency switch circuit 21 and a first amplifying circuit 22 connected to the radio frequency switch circuit 21, and the method includes:
step 51: the antenna receives the radio frequency signal and sends the radio frequency signal to the radio frequency switch circuit.
Step 52: the radio frequency switch circuit processes the radio frequency signal and sends the processed radio frequency signal to the receiver.
During a receive timeslot, the antenna 10 may send a received rf signal to the rf switch circuit 21 for processing, and the rf switch circuit 21 sends the rf signal to the transceiver 30 after processing.
Step 53: the transceiver receives the processed radio frequency signal output by the radio frequency switch circuit.
In this embodiment, when receiving the radio frequency signal, the radio frequency signal reaches the transceiver 30 through the antenna 10 and the radio frequency switch circuit 21, and does not need to pass through the first amplifying circuit 22, so that the receiving link can be shorted, and the path loss can be reduced.
Referring to fig. 1 and 6, fig. 6 is a schematic flowchart of an embodiment of a communication method provided in the present application, the method is applied to a communication device, the communication device includes an antenna 10, an rf front-end circuit 20 and a transceiver 30, which are connected in sequence, the rf front-end circuit 20 includes an rf switch circuit 21 and a first amplifier circuit 22 connected to the rf switch circuit 21, and the method includes:
step 61: in a receiving time slot, an antenna receives a radio frequency signal and sends the radio frequency signal to a radio frequency switch circuit; the radio frequency switch circuit processes the radio frequency signal and sends the processed radio frequency signal to a receiver; the transceiver receives the processed radio frequency signal output by the radio frequency switch circuit.
This step is similar to steps 51-53 of the previous embodiment and will not be described again.
Step 62: in a transmitting time slot, the transceiver receives the intermediate frequency signal, modulates the intermediate frequency signal, generates a first high frequency signal and sends the first high frequency signal to the first amplifying circuit; the first amplifying circuit amplifies the first high-frequency signal to generate a radio-frequency signal, and the radio-frequency signal is sent to the antenna through the radio-frequency switch circuit.
The transmitting link comprises a transceiver 30, a first amplifying circuit 22, a radio frequency switch circuit 21 and an antenna 10 which are connected in sequence, in a transmitting time slot, a first high-frequency signal output by the transceiver 30 is amplified by the first amplifying circuit 22 and then reaches the radio frequency switch circuit 21, and the radio frequency switch circuit 21 can output a radio frequency signal output by the first amplifying circuit 22 to the antenna 10 to finish transmitting the radio frequency signal.
The embodiment can complete the transmission and reception of the radio frequency signal, and when receiving the radio frequency signal, the radio frequency signal does not need to pass through the first amplifying circuit 22, so that the receiving link can be shortened, and the path loss is reduced.
The above embodiments are merely examples, and not intended to limit the scope of the present application, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present application, or those directly or indirectly applied to other related arts, are included in the scope of the present application.
Claims (12)
1. A communication device, comprising:
an antenna for receiving a radio frequency signal;
the radio frequency front-end circuit comprises a radio frequency switch circuit and a first amplifying circuit connected with the radio frequency switch circuit, the radio frequency switch circuit is connected with the antenna, the radio frequency switch circuit is used for processing the radio frequency signal, and the first amplifying circuit is used in a transmitting link;
and the transceiver is respectively connected with the first amplifying circuit and the radio frequency switch circuit and is used for receiving the processed radio frequency signal sent by the radio frequency switch circuit.
2. The communication device of claim 1,
the radio frequency switch circuit comprises a switch, and the switch is respectively connected with the first amplifying circuit, the transceiver and the antenna and is used for conducting a path between the first amplifying circuit and the antenna and conducting a path between the antenna and the transceiver.
3. The communication device of claim 2,
the switch is a multi-channel radio frequency switch, the multi-channel radio frequency switch at least comprises a control end, a first end, a second end and a third end, the first end is connected with the output end of the first amplifying circuit, the second end is connected with the antenna, and the third end is connected with the receiving end of the transceiver; and in the receiving time slot, the second end and the third end of the multi-channel radio frequency switch are conducted.
4. The communication device of claim 3,
the radio frequency front-end circuit further comprises a processor, wherein the processor is respectively connected with the transceiver and the control ends of the multiple radio frequency switches and is used for respectively sending the intermediate frequency signals and the control signals to the transceiver and the multiple radio frequency switches.
5. The communication device of claim 4,
the processor is further configured to receive an analog signal, and perform frequency mixing processing on the analog signal to generate the intermediate frequency signal.
6. The communication device of claim 4,
the processor is connected with the multi-channel radio frequency switch through a mobile industry processor interface line, and is further used for scanning signals, detecting the signal with the strongest signal strength in the scanned signals, recording the signal with the strongest signal strength as the radio frequency signal, and sending the control signal to control the multi-channel radio frequency switch to be closed so as to enable a channel between the antenna and the transceiver to be conducted.
7. The communication device of claim 6,
the radio frequency front-end circuit further comprises a filter and a low noise amplifier connected with the filter, the filter is connected with a third end of the multi-path radio frequency switch, and the filter is used for filtering the radio frequency signal and sending the filtered radio frequency signal to the low noise amplifier; the low noise amplifier is connected with the receiving end of the transceiver and used for amplifying the signal output by the filter and outputting the amplified radio frequency signal to the receiving end of the transceiver.
8. The communication device of claim 6,
the processor is further configured to send an intermediate frequency signal to the transceiver in a transmission timeslot, and the transceiver is configured to modulate the intermediate frequency signal, generate a first high frequency signal, and send the first high frequency signal to the first amplifying circuit; the first amplifying circuit is used for amplifying the first high-frequency signal to generate a radio-frequency signal and sending the radio-frequency signal to the multi-channel radio-frequency switch; when the multi-channel radio frequency switch receives the control signal sent by the processor, the first end and the second end of the multi-channel radio frequency switch are conducted, so that the radio frequency signal is sent to the antenna.
9. The communication device of claim 8,
the radio frequency switch circuit further comprises a second amplifying circuit, the multi-path radio frequency switch further comprises a fourth end, the second amplifying circuit is respectively connected with the transmitting end of the transceiver and the fourth end of the multi-path radio frequency switch and used for amplifying a second high-frequency signal transmitted by the transceiver to generate the radio frequency signal, and the radio frequency signal is transmitted to the antenna through the multi-path radio frequency switch.
10. A radio frequency front-end circuit, comprising a radio frequency switch circuit and a first amplification circuit connected to the radio frequency switch circuit, wherein the radio frequency switch circuit is the radio frequency switch circuit according to any one of claims 1 to 9, and the first amplification circuit is the first amplification circuit according to any one of claims 1 to 9.
11. A radio frequency signal receiving method is applied to communication equipment, the communication equipment comprises an antenna, a radio frequency front end circuit and a transceiver which are connected in sequence, the radio frequency front end circuit comprises a radio frequency switch circuit and a first amplifying circuit connected with the radio frequency switch circuit, and the method comprises the following steps:
the antenna receives a radio frequency signal and sends the radio frequency signal to the radio frequency switch circuit;
the radio frequency switch circuit processes the radio frequency signal and sends the processed radio frequency signal to the receiver;
and the transceiver receives the processed radio frequency signal output by the radio frequency switch circuit.
12. A communication method, applied to a communication device including an antenna, a radio frequency front end circuit and a transceiver connected in sequence, wherein the radio frequency front end circuit includes a radio frequency switch circuit and a first amplification circuit connected to the radio frequency switch circuit, the method comprising:
in a receiving time slot, the antenna receives a radio frequency signal and sends the radio frequency signal to the radio frequency switch circuit; the radio frequency switch circuit processes the radio frequency signal and sends the processed radio frequency signal to the receiver; the transceiver receives the processed radio frequency signal output by the radio frequency switch circuit;
in a transmitting time slot, the transceiver receives an intermediate frequency signal, modulates the intermediate frequency signal to generate a first high-frequency signal, and sends the first high-frequency signal to the first amplifying circuit; the first amplifying circuit amplifies the first high-frequency signal to generate a radio-frequency signal, and the radio-frequency signal is sent to the antenna through the radio-frequency switch circuit.
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| CN201910768372.1A CN112491434A (en) | 2019-08-20 | 2019-08-20 | Radio frequency front-end circuit, radio frequency signal receiving method, communication method and communication equipment |
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| CN201910768372.1A CN112491434A (en) | 2019-08-20 | 2019-08-20 | Radio frequency front-end circuit, radio frequency signal receiving method, communication method and communication equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023000793A1 (en) * | 2021-07-19 | 2023-01-26 | 华为技术有限公司 | Radio frequency transceiver, connection assembly for radio frequency transceivers, and radio frequency transceiver system |
| WO2023216785A1 (en) * | 2022-05-10 | 2023-11-16 | 华为技术有限公司 | Radio frequency front-end module, control method therefor, control circuit, and communication device |
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| WO2023216785A1 (en) * | 2022-05-10 | 2023-11-16 | 华为技术有限公司 | Radio frequency front-end module, control method therefor, control circuit, and communication device |
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