CN110266327B - Communication circuit and electronic device having the same - Google Patents

Communication circuit and electronic device having the same Download PDF

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Publication number
CN110266327B
CN110266327B CN201910548430.XA CN201910548430A CN110266327B CN 110266327 B CN110266327 B CN 110266327B CN 201910548430 A CN201910548430 A CN 201910548430A CN 110266327 B CN110266327 B CN 110266327B
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communication
antenna
lpwan
path
transceiver
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CN110266327A (en
Inventor
杨鑫
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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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
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/006—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
    • 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
    • H04B1/401—Circuits for selecting or indicating operating mode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • 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 provides a communication circuit and have its electronic equipment, wherein, communication circuit includes: a first antenna; a first communication branch that receives or transmits signals through the first antenna; a Low Power Wide Area Network (LPWAN) communication leg to receive or transmit signals through the first antenna; the multiplexing switch is connected with the first communication branch, the first antenna and the LPWAN communication branch, and the multiplexing switch is used for controlling the LPWAN communication branch or the first communication branch is communicated with the first antenna to share the first antenna, so that the LPWAN communication of the electronic equipment can be realized, the communication capacity of the electronic equipment is expanded, in addition, the original antenna structure of the electronic equipment is not required to be changed, and the multiplexing switch is low in cost and easy to realize.

Description

Communication circuit and electronic device having the same
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communication circuit and an electronic device having the same.
Background
In the related art, a radio frequency front-end circuit of an electronic device such as a mobile phone is usually designed based on communication systems such as a cellular network, WIFI, and bluetooth BT, however, LPWAN rises with the heat of the internet of things, and the existing communication system in the electronic device cannot realize LPWAN communication, so that communication capability is limited, and user experience is affected.
Content of application
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present application is to provide a communication circuit to implement LPWAN communication functions and expand communication capabilities of electronic devices.
A second object of the present application is to propose an electronic device having the communication circuit.
To achieve the above object, an embodiment of a first aspect of the present application provides a communication circuit, including: a first antenna; a first communication branch that receives or transmits signals through the first antenna; a Low Power Wide Area Network (LPWAN) communication leg to receive or transmit signals through the first antenna; the multiplexing switch is connected with the first communication branch, the first antenna and the LPWAN communication branch, and the multiplexing switch is used for controlling the LPWAN communication branch or the first communication branch to be communicated with the first antenna so as to share the first antenna.
According to the communication circuit that this application embodiment provided, make LPWAN communication branch road and first communication branch road even share first antenna through multiplexing switch to, can make electronic equipment realize LPWAN communication, expand electronic equipment's communication ability, moreover, need not to change the original antenna structure of electronic equipment, with low costs, easily realize.
According to an embodiment of the application, the first communication leg is a cellular communication leg.
According to an embodiment of the present application, the cellular communication branch includes a cellular communication transceiver and a radio frequency front end module, the multiplexing switch is an independent switching device, wherein the switching device has a first path and a second path, one end of the first path of the switching device is connected to the first antenna, the other end of the first path of the switching device is connected to the LPWAN communication branch, one end of the second path of the switching device is connected to the first antenna, the other end of the second path of the switching device is connected to the first port of the radio frequency front end module, and the second port of the radio frequency front end module is further connected to the cellular communication transceiver.
According to an embodiment of the present application, the cellular communication branch includes a cellular communication transceiver and a radio frequency front end module, the multiplexing switch is a first path of a switch unit in the radio frequency front end module, wherein one end of the first path of the switch unit is connected to the first antenna, the other end of the first path of the switch unit is connected to the LPWAN communication branch, the switch unit further has a second path to an N +1 th path, one end of the second path to the N +1 th path of the switch unit is connected to the first antenna, the other ends of the second path to the N +1 th path of the switch unit are respectively and correspondingly connected to first ends of N radio frequency paths in the radio frequency front end module, second ends of the N radio frequency paths are further connected to the cellular communication transceiver, and N is a positive integer.
According to an embodiment of the present application, the cellular communication transceiver is connected to a cellular communication interface of a processor, and the cellular communication transceiver transmits IQ signals with the processor.
According to an embodiment of the application, the first communication leg is a Connectivity communication leg.
According to an embodiment of the present application, the Connectivity communication branch includes a Connectivity transceiver, a first frequency band path, a second frequency band path, and a combiner, a first port of the combiner is connected to the first antenna, a second port of the combiner is connected to one end of the first frequency band path, a third port of the combiner is connected to one end of the second frequency band path, the other ends of the first frequency band path and the second frequency band path are connected to the Connectivity transceiver, and the multiplexer switch is connected between the first frequency band path and the combiner, wherein the multiplexer switch has a first path and a second path, one end of the first path of the multiplexer switch is connected to the second port of the combiner, the other end of the first path of the multiplexer switch is connected to the LPWAN communication branch, and one end of the second path of the multiplexer switch is connected to the second port of the combiner, and the other end of the second path of the multiplexing switch is connected with the first frequency band path.
According to an embodiment of the present application, the Connectivity transceiver is connected to a Connectivity communication interface of a processor, and the Connectivity communication transceiver transmits IQ signals with the processor.
According to an embodiment of the application, the Connectivity communication leg is configured to receive or transmit at least one of radio frequency signals, BT signals, GPS signals and FM signals.
According to one embodiment of the application, the LPWAN communication branch comprises a LPWAN transceiver, wherein the LPWAN transceiver is connected with the multiplexing switch, the LPWAN transceiver is also connected with a digital interface of a processor, and digital signals are transmitted between the LPWAN transceiver and the processor.
According to one embodiment of the present application, the LPWAN communication leg further comprises a micro control chip connected between the LPWAN transceiver and the processor.
According to one embodiment of the application, the LPWAN transceiver performs LoRa or Sigfox wireless transmission.
In order to achieve the above object, an electronic device according to an embodiment of a second aspect of the present application includes the communication circuit according to the embodiment of the first aspect.
According to the electronic equipment provided by the embodiment of the application, the communication circuit of the embodiment of the first aspect can enable the electronic equipment to realize LPWAN communication, the communication capability of the electronic equipment is expanded, in addition, the original antenna structure of the electronic equipment does not need to be changed, the cost is low, and the implementation is easy.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a block schematic diagram of a communication circuit according to an embodiment of the present application;
fig. 2 is a first schematic diagram of an LPWAN communication leg in a communication circuit according to an embodiment of the present application;
fig. 3 is a second schematic diagram of an LPWAN communication leg in a communication circuit according to an embodiment of the present application;
FIG. 4 is a schematic diagram one of a communication circuit according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a second schematic of a communication circuit according to an embodiment of the present application;
FIG. 6 is a schematic diagram of an RF front end module in a communication circuit according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a second schematic of a communication circuit according to an embodiment of the present application; and
FIG. 8 is a block schematic diagram of an electronic device according to an embodiment of the application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
A communication circuit and an electronic apparatus having the same of the embodiments of the present application are described below with reference to the drawings.
It can be understood that the communication circuit of the embodiment of the present application may be used in an electronic device, and the electronic device may further communicate with other devices through the communication circuit, for example, to implement LPWAN (Low-Power Wide-Area Network) communication. Specifically, in a communication circuit of the electronic device, an LPWAN communication branch is added, and the LPWAN communication branch and a cellular communication branch (or a Connectivity communication branch) share an antenna in a time division multiplexing manner, so that the electronic device can use the LPWAN technology, thereby expanding the communication capability of the electronic device.
The common antenna may be selected according to an operating frequency band of the LPWAN communication branch, for example, when an operating frequency of the LPWAN communication branch is a Sub-1G ISM band using the unlicensed signal, the LPWAN communication branch is set to share the antenna with the cellular communication branch, and when the operating frequency of the LPWAN communication branch is a 2.4G band, the LPWAN communication branch is set to share the antenna with the Connectivity communication branch.
In some embodiments of the present application, the electronic device may be a mobile terminal, for example, the mobile terminal may include, but is not limited to, a mobile phone, a tablet computer, a smart wearable device (smart watch, smart bracelet, etc.).
The structure of the communication circuit according to the embodiment of the present application will be described in detail below with reference to fig. 1 to 5.
Fig. 1 is a block schematic diagram of a communication circuit according to an embodiment of the present application. As shown in fig. 1, the communication circuit includes: a first antenna 11, a first communication branch 12, a low power wide area network LPWAN communication branch 13, and a multiplexing switch 14.
Wherein, the first communication branch 12 can receive or transmit signals through the first antenna 11; the LPWAN communication branch 13 may receive or transmit signals through the first antenna 11; the multiplexing switch 14 is connected to the first communication branch 12, the first antenna 11 and the LPWAN communication branch 13, and the multiplexing switch 14 is configured to control the LPWAN communication branch 13 or the first communication branch 12 to communicate with the first antenna 11, so as to share the first antenna 11.
It is understood that the multiplexing switch 14 can control the LPWAN communication branch 13 or the first communication branch 12 to communicate with the first antenna 11 according to the received control instruction. Specifically, the electronic device may send a first control instruction to the multiplexing switch 14 when receiving an instruction to start LPWAN communication, and the multiplexing switch 14 may control the LPWAN communication branch 13 to connect with the first antenna 11 according to the first control instruction, at this time, the LPWAN communication branch 13 may receive or send a signal through the first antenna 11. Similarly, the electronic device may send a second control instruction to the multiplexing switch 14 when receiving an instruction to start the first communication branch or an instruction to close LPWAN communication, and the multiplexing switch 14 may control the first communication branch 12 to connect with the first antenna 11 according to the second control instruction, at this time, the first communication branch 12 may receive or send a signal through the first antenna 11.
In addition, the communication circuit may further include a second antenna and a second communication branch, wherein the second communication branch may receive or transmit signals through the second antenna.
Therefore, the communication circuit provided by the embodiment of the application enables the LPWAN communication branch 13 and the first communication branch 12 to share the first antenna 11 through the multiplexing switch 14, so that LPWAN communication can be realized by the electronic device, the communication capability of the electronic device is expanded, and moreover, the original antenna structure of the electronic device does not need to be changed, so that the communication circuit is low in cost and easy to realize.
According to one embodiment of the application, as shown in fig. 2, the LPWAN communication leg 13 includes a LPWAN transceiver 131, wherein the LPWAN transceiver 131 is connected to the multiplexing switch 14.
Specifically, the signal transmitted between the LPWAN communication branch 13 and the first antenna 11 may be a radio frequency RF signal, and the LPWAN transceiver 131 may convert the received radio frequency RF signal into a digital signal and transmit the digital signal to the processor 20.
For example, when the multiplexing switch 14 controls the LPWAN communication branch 13 to connect with the first antenna 11, the LPWAN transceiver 131 can receive or transmit signals through the first antenna 11, for example, when the communication circuit receives signals, the first antenna 11 can receive radio frequency signals and transmit the received radio frequency signals to the LPWAN transceiver 131. Alternatively, when the communication circuit transmits a signal, the LPWAN transceiver 131 processes the received signal to generate a radio frequency signal, and transmits the radio frequency signal to the first antenna 11, so that the first antenna 11 transmits the radio frequency signal.
Further, the LPWAN transceiver 131 is connected to a digital interface of the processor 20, and the LPWAN transceiver 131 transmits digital signals to the processor 20. That is, LPWAN transceiver 131 may transmit the processed signal to processor 20.
It is understood that the LPWAN transceiver 131 is connected to the digital Interface of the processor 20, and transmits signals through a specific digital Interface protocol, such as UART (Universal Asynchronous Receiver/Transmitter), SPI (Serial Peripheral Interface).
In other embodiments of the present application, as shown in fig. 3, the LPWAN communication branch 13 may further include a micro control chip 132, the micro control chip 132 is connected between the LPWAN transceiver 131 and the processor 20, and the micro control chip 132 is configured to process signals and control the LPWAN transceiver 131 to transceive signals. That is, when the communication circuit receives a signal, the LPWAN transceiver 131 processes the received radio frequency signal and sends the processed radio frequency signal to the micro control chip 132, and the micro control chip 132 further processes the radio frequency signal and sends the processed radio frequency signal to the processor 20. Alternatively, when the communication circuit transmits a signal, the LPWAN transceiver 131 may receive the signal processed by the micro control chip 132, process the received signal to generate a radio frequency signal, and transmit the radio frequency signal to the first antenna 11, so that the first antenna 11 transmits the radio frequency signal.
As shown in fig. 4, 5 and 7, a filter 133 is disposed at one end of the LPWAN transceiver 131 connected to the first antenna 13, for example, when the communication circuit receives a signal, the first antenna 11 may receive the signal, transmit the received signal to the filter 133, and transmit the high-quality signal filtered by the filter 133 to the LPWAN transceiver 131. Alternatively, when the communication circuit transmits a signal, the filter 133 may filter a radio frequency signal to be transmitted and transmit the filtered signal to the first antenna 11.
It should be understood that the pass band of the filter on each link contains at least the frequency of the RF signal transmitted by that link, that is, the pass band of the filter 133 contains at least the frequency of the RF signal transmitted by the LPWAN communication branch 13.
As one example, LPWAN transceiver 131 may perform LoRa or Sigfox wireless transmissions. That is, the wireless transmission technology used by the LPWAN communication branch 13 may be LoRa, Sigfox, etc., or may be other proprietary protocols. Among them, LoRa is a low power consumption networking technology developed by SemTech, and is a long-distance wireless transmission technology based on a spread spectrum technology, and mainly works at ISM common frequency.
In some embodiments of the present application, the operating frequency of the LPWAN communication branch 13 may be the Sub-1GISM band using the unlicensed, or the operating frequency of the LPWAN communication branch 13 may be the 2.4G band. Wherein, the common antenna can be selected according to the working frequency band of the LPWAN communication branch 13.
A structure of a communication circuit according to an embodiment of the present application will be described below with reference to fig. 4 to 6.
According to one embodiment of the application, the first communication leg 12 may be a cellular communication leg 30, as shown in fig. 4. The cellular communication, i.e. Celluar modem, can refer to the cellular communication system 2G/3G/4G/5G.
Specifically, the cellular communication branch 30 includes a cellular communication transceiver 301 and a radio frequency front end module 302, wherein the cellular communication transceiver 301 is connected to a cellular communication interface of the processor 20, and the cellular communication transceiver transmits IQ signals with the processor 20 (where I is in-phase and q is quadrature).
More specifically, the signal transmitted between the cellular communication transceiver 301 and the first antenna 11 may be a radio frequency RF signal, and the cellular communication transceiver 301 may convert the received radio frequency RF signal into an IQ signal and transmit the IQ signal to the processor 20.
As an example, when the multiplexing switch 14 controls the cellular communication branch 30 to connect with the first antenna 11, the cellular communication branch 30 may receive or transmit a signal through the first antenna 11, for example, when the communication circuit receives a signal, the first antenna 11 may receive the signal and transmit the received signal to the rf front-end module 302, then the rf front-end module 302 may amplify, filter, match, etc. the signal and transmit the processed signal to the cellular communication transceiver 301, and then the cellular communication transceiver 301 may process the received signal, for example, convert the rf signal into an IQ signal and transmit the processed signal to the processor 20. Alternatively, when the communication circuit receives a signal, the rf front-end module 302 may amplify, filter, match, and the like the rf signal to be transmitted, and transmit the processed signal to the first antenna 11.
It should also be understood that when the operating frequency of the LPWAN communication branch 13 is in the Sub-1G ISM band using the unlicensed spectrum, the first communication branch 12 may select the cellular communication branch 30, i.e. the LPWAN communication branch 13 shares the first antenna 11 with the cellular communication branch 30, i.e. the first antenna 11 may select the antenna ANT1 of the cellular communication branch 30.
The working frequency band of the antenna ANT1 at least includes a working frequency band of LPWAN communication and a frequency band of a cellular communication system set by the electronic device.
In one embodiment of the present application, where the LPWAN communication leg 13 shares an antenna ANT1 with the cellular communication leg 30, the second communication leg may be the Connectivity communication leg 40 and the second antenna may be the antenna ANT2 of the Connectivity communication leg 40.
The Connectivity module is configured to communicate with a mobile platform, where the Connectivity module includes WIFI communication, BT (Bluetooth) communication, or may further include GPS (Global positioning system) and FM (Frequency Modulation).
Specifically, the Connectivity communication branch 40 includes a Connectivity transceiver 401, a first frequency band path 402, a second frequency band path 403, and a combiner 404, where a first port of the combiner 404 is connected to the second antenna, a second port of the combiner 404 is connected to one end of the first frequency band path 402, a third port of the combiner 404 is connected to one end of the second frequency band path 403, and the other ends of the first frequency band path 402 and the second frequency band path 403 are connected to the Connectivity transceiver 401.
The Connectivity transceiver 401 is connected to the Connectivity communication interface of the processor 20, and IQ signals are transmitted between the Connectivity transceiver and the processor 20.
More specifically, the signal transmitted between the Connectivity communication branch 40 and the second antenna may be a radio frequency RF signal, and the Connectivity communication branch 40 may convert the received radio frequency RF signal into an IQ signal and transmit the IQ signal to the processor 20.
As an example, when the Connectivity communication branch 40 sends a signal, the Connectivity transceiver 401 may process the signal sent by the processor 20 to generate a radio frequency signal in a first frequency band and a radio frequency signal in a second frequency band, where the radio frequency signal in the first frequency band is transmitted to the second port of the Combiner 404 through the first frequency band path 402, the radio frequency signal in the second frequency band is transmitted to the third port of the Combiner 404 through the second frequency band path 403, and the radio frequency signal in the first frequency band and the radio frequency signal in the second frequency band are combined by the Combiner 404, i.e., a Combiner, and then reach the antenna ANT 2.
In other embodiments, when the Connectivity communication branch 40 transmits a signal, the Connectivity transceiver 401 may process the signal transmitted by the processor 20 to generate a radio frequency signal in the first frequency band or a radio frequency signal in the second frequency band, and then the radio frequency signal in the first frequency band or the radio frequency signal in the second frequency band reaches the antenna ANT2 through the Combiner 404, i.e., Combiner.
The first frequency band path 402 is provided with a filter 4021, the operating frequency band of the first frequency band path 402 is WIFI2.4G, the filter 4021 is used for filtering, and the pass band of the filter 4021 at least includes the frequency of the RF signal transmitted by the first frequency band path 402. The second frequency band path 403 is provided with a filter 4031, the operating frequency band of the second frequency band path 403 is WIFI5G, the filter 4031 is used for filtering, and the pass band of the filter 4021 at least includes the frequency of the RF signal transmitted by the second frequency band path 403.
It is understood that when the operating frequency of the LPWAN communication branch 13 is the Sub-1G ISM band using the unlicensed spectrum, the Connectivity communication branch may receive or transmit signals using the antenna ANT2 by itself without sharing an antenna with the LPWAN communication branch 13.
The working frequency band of the antenna ANT2 at least includes WIFI2.4G and WIFI5G frequency bands.
According to the embodiment of fig. 4, the multiplexing switch 14 is an independent switching device 141, wherein the switching device 141 has a first path and a second path, one end of the first path of the switching device 141 is connected to the first antenna 11, the other end of the first path of the switching device 141 is connected to the LPWAN communication branch 13, one end of the second path of the switching device 141 is connected to the first antenna 11, the other end of the second path of the switching device 141 is connected to the first port of the rf front-end module 302, and the second port of the rf front-end module 302 is further connected to the cellular communication transceiver 301.
The switching device 141 may be a single-pole double-throw switch SPDT, a first path is formed between a first terminal and a common terminal of the single-pole double-throw switch SPDT, and a second path is formed between a second terminal and the common terminal of the single-pole double-throw switch SPDT.
It should be understood that the LPWAN communication branch 13 turns on the first antenna 11, i.e., the antenna ANT1, through the first path when the first path of the switching device 141 is turned on, i.e., the first terminal of the single pole double throw switch SPDT is turned on with the common terminal, and the cellular communication transceiver 301 and the radio frequency front end module 302 turn on the first antenna 11, i.e., the antenna ANT1, through the second path when the second path of the switching device 141 is turned on, i.e., the second terminal of the single pole double throw switch SPDT is turned on with the common terminal.
Therefore, the LPWAN communication branch 13 and the cellular communication branch 30 share the antenna ANT1 through the SPDT, so that the LPWAN communication can be realized by the electronic equipment, the communication capability of the electronic equipment is expanded, the original antenna structure of the electronic equipment does not need to be changed, and the LPWAN communication branch is low in cost and easy to realize.
According to the embodiments of fig. 5 and fig. 6, the multiplexing switch 14 is a first path of the switch unit 3021 in the rf front-end module 302, wherein one end of the first path of the switch unit 3021 is connected to the first antenna 11, the other end of the first path of the switch unit 3021 is connected to the LPWAN communication branch 13, the switch unit 3021 further has a second path to an N +1 th path, one end of the second path to the N +1 th path of the switch unit 3021 is connected to the first antenna 11, the other ends of the second path to the N +1 th path of the switch unit 3021 are respectively connected to first ends of N rf paths 3022 in the rf front-end module 302, the second ends of the N rf paths 3022 are further connected to the cellular communication transceiver 301, and N is a positive integer.
That is, when there is a redundant port in the rf front-end module 302, i.e., the switch unit 3021 in the FEM module, the LPWAN communication branch 13 can be connected to the switch unit 3021 in the rf front-end module 302, so that a separate switch device is not required, thereby saving cost and installation space.
The N rf paths 3022 may be rf paths of different communication bands, for example, the communication band of the first rf path may be B1, the communication band of the second rf path may be B2, and the communication band of the third rf path may be B3 and … …, where B1, B2, B3 and … … are different from each other.
It will be appreciated that the LPWAN communication branch 13 turns on the first antenna 11, i.e., the antenna ANT1, through the first path when the first path of the switch unit 3021 is on, and the cellular communication transceiver 301 turns on the first antenna 11, i.e., the antenna ANT1, through the turned-on path in the switch unit 3021 when one of the second path to the N +1 th path of the switch unit 3021 is turned on.
Therefore, the LPWAN communication branch 13 and the cellular communication branch 30 share the antenna ANT1 through the switch unit 3021 in the radio frequency front-end module 302, so that LPWAN communication can be realized by the electronic device, the communication capability of the electronic device is expanded, and moreover, the original antenna structure of the electronic device does not need to be changed, so that the cost is low and the implementation is easy.
Another structure of the communication circuit according to the embodiment of the present application will be described with reference to fig. 7.
According to another embodiment of the present application, as shown in fig. 7, the first communication leg 12 may be a Connectivity communication leg 40.
Wherein the Connectivity communication leg 40 is configured to receive or transmit at least one of radio frequency signals, BT signals, GPS signals and FM signals. That is, the Connectivity module is a mobile platform, and the Connectivity communication includes WIFI communication, BT (Bluetooth) communication, or may further include GPS (Global Positioning System) and FM (Frequency Modulation).
Specifically, the Connectivity communication branch 40 includes a Connectivity transceiver 401, a first frequency band path 402, a second frequency band path 403, and a combiner 404, where a first port of the combiner 404 is connected to the first antenna 11, a second port of the combiner 404 is connected to one end of the first frequency band path 402, a third port of the combiner 404 is connected to one end of the second frequency band path 403, and the other ends of the first frequency band path 402 and the second frequency band path 403 are connected to the Connectivity transceiver 401.
The Connectivity transceiver 401 is connected to the Connectivity communication interface of the processor 20, and IQ signals are transmitted between the Connectivity communication transceiver 401 and the processor 20.
More specifically, the signal transmitted between the Connectivity communication branch 40 and the first antenna 11 may be a radio frequency RF signal, and the Connectivity communication branch 40 may convert the received radio frequency RF signal into an IQ signal and transmit the IQ signal to the processor 20.
As an example, when the multiplexer 14 controls the Connectivity communication branch 40 to connect to the first antenna 11, the Connectivity communication branch 40 may receive or transmit a signal through the first antenna 11, for example, when the Connectivity communication branch 40 transmits a signal, the Connectivity transceiver 401 may process the signal transmitted by the processor 20 to generate a radio frequency signal in a first frequency band and a radio frequency signal in a second frequency band, the radio frequency signal in the first frequency band is transmitted to the second port of the combiner 404 through the first frequency band path 402, the radio frequency signal in the second frequency band is transmitted to the third port of the combiner 404 through the second frequency band path 403, and the radio frequency signal in the first frequency band and the radio frequency signal in the second frequency band are combined by the combiner 404 and then reach the antenna ANT 2.
In other embodiments, when the Connectivity communication branch 40 transmits a signal, the Connectivity transceiver 401 may process the signal transmitted by the processor 20 to generate a radio frequency signal in the first frequency band or a radio frequency signal in the second frequency band, and then the radio frequency signal in the first frequency band or the radio frequency signal in the second frequency band reaches the antenna ANT2 through the Combiner 404, i.e., Combiner.
It should also be appreciated that when the operating frequency of the LPWAN communication branch 13 is in the 2.4G band, the first communication branch 12 may select the Connectivity communication branch 40, i.e. the LPWAN communication branch 13 shares the first antenna 11 with the Connectivity communication branch 40, i.e. the first antenna 11 may select the antenna ANT2 of the Connectivity communication branch 40.
The working frequency band of the antenna ANT2 at least includes the working frequency band of LPWAN communication, WIFI2.4G and WIFI5G frequency bands.
The first frequency band path 402 is provided with a filter 4021, the operating frequency band of the first frequency band path 402 is WIFI2.4G, the filter 4021 is used for filtering, and the pass band of the filter 4021 at least includes the frequency of the RF signal transmitted by the first frequency band path 402. The second frequency band path 403 is provided with a filter 4031, the operating frequency band of the second frequency band path 403 is WIFI5G, the filter 4031 is used for filtering, and the pass band of the filter 4021 at least includes the frequency of the RF signal transmitted by the second frequency band path 403.
In one embodiment of the present application, where the LPWAN communication leg 13 shares an antenna ANT2 with the Connectivity communication leg 40, the second communication leg may be the cellular communication leg 30 and the second antenna may be the antenna ANT1 of the cellular communication leg 30.
The cellular communication, i.e. Celluar modem, can refer to the cellular communication system 2G/3G/4G/5G.
Specifically, the cellular communication branch 30 includes a cellular communication transceiver 301 and a radio frequency front end module 302, wherein the cellular communication transceiver 301 is connected to a cellular communication interface of the processor 20, and the cellular communication transceiver transmits IQ signals with the processor 20 (where I is in-phase and q is quadrature).
More specifically, the signal transmitted between the cellular communication transceiver 301 and the antenna ANT1 may be a radio frequency RF signal, and the cellular communication transceiver 301 may convert the received radio frequency RF signal into an IQ signal and transmit the IQ signal to the processor 20.
As an example, the cellular communication branch 30 may receive or transmit a signal through the first antenna 11, for example, when the communication circuit receives a signal, the first antenna 11 may receive the signal and transmit the received signal to the rf front-end module 302, then the rf front-end module 302 may amplify, filter, match, etc. the signal and transmit the processed signal to the cellular communication transceiver 301, and then the cellular communication transceiver 301 may process the received signal, for example, convert the rf signal into an IQ signal and transmit the processed signal to the processor 20. Alternatively, when the communication circuit receives a signal, the rf front-end module 302 may amplify, filter, match, and the like the rf signal to be transmitted, and transmit the processed signal to the first antenna 11.
It will be appreciated that when the LPWAN communications branch 13 is operating at a 2.4G frequency band, the cellular communications branch 30 may receive or transmit signals using the antenna ANT1 on its own without sharing an antenna with the LPWAN communications branch 13.
The working frequency band of the antenna ANT1 at least includes a frequency band of a cellular communication system set by the electronic device.
According to the embodiment of fig. 8, the multiplexing switch 14 is connected between the first frequency band path 402 and the combiner 404, the multiplexing switch 14 has a first path and a second path, one end of the first path of the multiplexing switch 14 is connected to the second port of the combiner 404, the other end of the first path of the multiplexing switch 14 is connected to the LPWAN communication branch 13, one end of the second path of the multiplexing switch 14 is connected to the second port of the combiner 404, and the other end of the second path of the multiplexing switch 14 is connected to the first frequency band path 402.
The multiplexing switch 14 may be a single-pole double-throw switch SPDT, a first path is formed between a first end and a common end of the single-pole double-throw switch SPDT, and a second path is formed between a second end and the common end of the single-pole double-throw switch SPDT.
It should be understood that when the first path of the multiplexing switch 14 is turned on, i.e., the first terminal of the SPDT is turned on from the common terminal, the LPWAN communication branch 13 turns on the first antenna 11, i.e., the antenna ANT2, through the first path, and when the second path of the multiplexing switch 14 is turned on, i.e., the second terminal of the SPDT is turned on from the common terminal, the first frequency band path 402 of the Connectivity transceiver 401 turns on the second port of the combiner 404 through the second path, and the combiner 404 is connected to the first antenna 11, i.e., the antenna ANT 2.
Therefore, the antenna ANT2 is shared by the LPWAN communication branch 13 and the Connectivity communication branch 40 through the SPDT, so that the LPWAN communication can be realized by the electronic equipment, the communication capability of the electronic equipment is expanded, the original antenna structure of the electronic equipment does not need to be changed, and the method is low in cost and easy to realize.
Based on the communication circuit of the above embodiment, the application also provides an electronic device.
FIG. 8 is a block schematic diagram of an electronic device according to an embodiment of the application. As shown in fig. 8, the electronic device 200 includes the communication circuit 100 as previously described.
According to the electronic equipment provided by the embodiment of the application, the electronic equipment can realize LPWAN communication, the communication capacity of the electronic equipment is expanded, in addition, the original antenna structure of the electronic equipment is not required to be changed, the cost is low, and the implementation is easy.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (8)

1. A communication circuit, comprising:
a first antenna;
a first communication branch that receives or transmits signals through the first antenna;
a second antenna;
a second communication branch, which receives or transmits signals through the second antenna;
a Low Power Wide Area Network (LPWAN) communication leg to receive or transmit signals through the first antenna;
the multiplexing switch is connected with the first communication branch, the first antenna and the LPWAN communication branch, and the multiplexing switch is used for controlling the LPWAN communication branch or the first communication branch to be communicated with the first antenna so as to share the first antenna;
wherein, according to the working frequency band of the LPWAN communication branch, the first communication branch is set as a Connectivity communication branch, the second communication branch is a cellular communication branch, the Connectivity communication branch includes a Connectivity transceiver, a first frequency band path, a second frequency band path and a combiner, a first port of the combiner is connected to the first antenna, a second port of the combiner is connected to one end of the first frequency band path, a third port of the combiner is connected to one end of the second frequency band path, the other ends of the first frequency band path and the second frequency band path are connected to the Connectivity transceiver, the multiplexing switch is connected between the first frequency band path and the combiner, wherein the multiplexing switch has a first path and a second path, one end of the first path of the multiplexing switch is connected to the second port of the combiner, and the other end of the first path of the multiplexing switch is connected to the LPWAN communication branch, one end of the second path of the multiplexing switch is connected with the second port of the combiner, and the other end of the second path of the multiplexing switch is connected with the first frequency band path.
2. The communication circuit of claim 1, wherein the cellular communication branch comprises a cellular communication transceiver and a radio frequency front end module, the cellular communication transceiver is connected to a cellular communication interface of the processor, and the cellular communication transceiver and the processor transmit IQ signals therebetween.
3. The communication circuit of claim 1, wherein the Connectivity transceiver is coupled to a Connectivity communication interface of a processor, and wherein IQ signals are transmitted between the Connectivity transceiver and the processor.
4. The communication circuit of claim 1, wherein the Connectivity communication leg is configured to receive or transmit at least one of radio frequency signals, BT signals, GPS signals, and FM signals.
5. The communication circuit of claim 1, wherein the LPWAN communication branch comprises a LPWAN transceiver, wherein the LPWAN transceiver is connected to the multiplexing switch, wherein the LPWAN transceiver is further connected to a digital interface of a processor, and wherein digital signals are transmitted between the LPWAN transceiver and the processor.
6. The communication circuit of claim 5, wherein the LPWAN communication leg further comprises a micro control chip connected between the LPWAN transceiver and the processor.
7. The communication circuit of claim 5, wherein the LPWAN transceiver performs LoRa or Sigfox wireless transmission.
8. An electronic device, characterized in that it comprises a communication circuit according to any one of claims 1-7.
CN201910548430.XA 2019-06-24 2019-06-24 Communication circuit and electronic device having the same Active CN110266327B (en)

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CN111726792B (en) * 2020-05-22 2021-09-28 深圳市南方硅谷半导体有限公司 Wireless communication method, wireless communication apparatus, storage medium, and computer device
CN112134591A (en) * 2020-09-24 2020-12-25 Oppo广东移动通信有限公司 Radio frequency circuit, control method of radio frequency circuit and electronic equipment
CN112468177B (en) * 2020-11-26 2022-07-12 Oppo广东移动通信有限公司 Radio frequency front-end circuit, electronic equipment and distance measuring method

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