CN214799477U - Wireless communication module - Google Patents
Wireless communication module Download PDFInfo
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- CN214799477U CN214799477U CN202120765975.9U CN202120765975U CN214799477U CN 214799477 U CN214799477 U CN 214799477U CN 202120765975 U CN202120765975 U CN 202120765975U CN 214799477 U CN214799477 U CN 214799477U
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- wireless communication
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- transmission line
- communication module
- module
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Abstract
The utility model discloses a wireless communication module, wireless communication module includes signal switching unit, signal processing unit and signal amplification unit. The signal switching unit is connected with an external antenna and used for switching the external antenna to a first transmission line or a second transmission line; the signal processing unit is connected with the first transmission line and the second transmission line, and is used for converting the radio-frequency signals transmitted by the first transmission line into digital signals to be output when the wireless communication module is in a receiving state, and outputting the radio-frequency signals to the second transmission line when the wireless communication module is in a transmitting state; the signal amplifying unit is arranged on the second transmission line and used for amplifying the radio-frequency signal output by the signal processing unit and outputting the radio-frequency signal to the signal switching unit when the wireless communication module works in a transmitting state. The utility model discloses both support and receive, support the transmission again, greatly improved the design efficiency of new product.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a wireless communication module.
Background
Along with the continuous improvement of standard of living, wireless communication module need be used to more and more scenes, for example wireless meter reading, intelligent house, automotive electronics, security protection warning, industrial monitoring and control, remote agricultural irrigation etc..
The wireless communication module needs to be embedded into an existing product or system for use, or a new product is developed from the beginning and planned to use, and for a user, different communication modules need to be selected for different application scenes or different products designed.
The existing wireless communication module can only receive or transmit wireless radio frequency signals, which brings inconvenience to the design of new products and reduces the design efficiency of the new products.
Disclosure of Invention
Therefore, it is necessary to provide a wireless communication module that supports both reception and transmission, which is convenient for the design of new products and can greatly improve the design efficiency of new products.
The utility model discloses a technical means do: a wireless communication module, the wireless communication module comprising:
the signal switching unit is connected with an external antenna and used for switching the external antenna to the first transmission line or the second transmission line; the first transmission line is used for transmitting radio frequency signals when the wireless communication module works in a receiving state; the second transmission line is used for transmitting radio frequency signals when the wireless communication module works in a transmitting state;
the signal processing unit is connected with the first transmission line and the second transmission line, and is used for converting the radio-frequency signals transmitted by the first transmission line into digital signals to be output when the wireless communication module is in a receiving state, and outputting the radio-frequency signals to the second transmission line when the wireless communication module is in a transmitting state; and
and the signal amplification unit is arranged on the second transmission line and used for amplifying the radio-frequency signal output by the signal processing unit and outputting the radio-frequency signal to the signal switching unit when the wireless communication module works in a transmitting state.
Since the technical scheme is used, the utility model provides a wireless communication module, including signal switching unit, signal processing unit and signal amplification unit, realized that the wireless communication module both supports the receipt, supports the transmission again, promptly the wireless communication module both can regard as the wireless receiving module, can regard as the wireless transmission module again, and the design of the new product of being convenient for can greatly improve the design efficiency of new product, shortens the research and development cycle to in the use in batches, can effectively guarantee the high performance and the uniformity of product. Meanwhile, by arranging the signal switching unit, the wireless communication module can be switched to a corresponding transmission line when working in different states, so that the separation of transmitting signals and receiving signals is realized, and the transmitting signals and the receiving signals are not disordered.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
FIG. 1 is a first diagram illustrating the structure of a wireless communication module according to an embodiment;
FIG. 2 is a block diagram of a wireless communication module according to an embodiment;
FIG. 3 is a block diagram of a wireless communication module according to an embodiment;
FIG. 4 is a circuit schematic of a wireless communication module in one embodiment;
fig. 5 is a block diagram of a wireless communication module in one embodiment.
In the figure: 1. a wireless communication module; 2. an external control device; 11. a signal switching unit; 111. an antenna matching module; 112. a radio frequency switch module; 12. a signal processing unit; 13. a signal amplification unit; 131. an amplifying module; 132. a voltage stabilization module; 133. a sampling module; 14. a first matching unit; 15. a second matching unit; 16A, a first transmission line; 16B, a second transmission line.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and not limitation. In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.
The terms first, second and the like in the description and in the claims, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be practiced otherwise than as specifically illustrated.
The utility model provides a pair of wireless communication module 1, in an embodiment, as shown in FIG. 1, wireless communication module 1 can include signal switching unit 11, signal processing unit 12 and signal amplification unit 13. The signal switching unit 11 may be connected to an external antenna for switching the external antenna to the first transmission line 16A or the second transmission line 16B; the first transmission line 16A is a transmission line for transmitting radio frequency signals when the wireless communication module 1 works in a receiving state; the second transmission line 16B is a transmission line for transmitting radio frequency signals when the wireless communication module 1 operates in a transmitting state; the signal processing unit 12 can be connected to the first transmission line 16A and the second transmission line 16B, and is configured to convert the radio frequency signal transmitted by the first transmission line 16A into a digital signal and output the digital signal when the wireless communication module 1 is in a receiving state, and output the radio frequency signal to the second transmission line 16B when the wireless communication module 1 is in a transmitting state; the signal amplifying unit 13 may be disposed on the second transmission line 16B, and configured to amplify the radio frequency signal output by the signal processing unit 12 and output the amplified radio frequency signal to the signal switching unit 11 when the wireless communication module 1 is in a transmitting state.
It should be noted that the wireless communication module 1 provided in this embodiment can be embedded into an existing product or system, or the wireless communication module 1 can be planned to be used at the beginning of new product development, for example, the wireless communication module 1 in this embodiment can be applied to a control device of a new product to implement a wireless transmitting or wireless receiving function according to the needs of the new product.
Illustratively, when the wireless communication module 1 needs to operate in a receiving state, the signal switching unit 11 can switch the external antenna to the first transmission line 16A according to an externally input receiving control signal, and the signal processing unit 12 converts the radio frequency signal transmitted by the first transmission line 16A into a digital signal and outputs the digital signal to the external control device 2, thereby implementing a wireless receiving function.
Illustratively, when the wireless communication module 1 needs to operate in a transmitting state, the signal switching unit 11 may switch the external antenna to the second transmission line 16B according to an externally input transmission control signal, the signal processing unit 12 outputs a radio frequency signal to the second transmission line 16B, and the radio frequency signal is amplified by the signal amplifying unit 13 and then output to the signal switching unit 11, and is transmitted through the external antenna, thereby implementing a wireless transmitting function.
The wireless communication module 1 provided by this embodiment includes the signal switching unit 11, the signal processing unit 12 and the signal amplifying unit 13, and it is realized that the wireless communication module 1 supports both reception and transmission, that is, the wireless communication module 1 can be used as both a wireless reception module and a wireless transmission module, which is convenient for designing new products, and can greatly improve the design efficiency of new products, shorten the development cycle, and in batch use, can effectively ensure the high performance and consistency of products. Meanwhile, by arranging the signal switching unit 11, the wireless communication module 1 can be switched to a corresponding transmission line when working in different states, so that the separation of transmitting signals and receiving signals is realized, and the transmitting signals and the receiving signals are not disordered.
In one embodiment, as shown in fig. 2, the signal amplifying unit 13 may include a voltage stabilizing module 132, a sampling module 133, and an amplifying module 131, where the voltage stabilizing module 132 may be configured to perform voltage reduction and voltage stabilization on the first voltage and obtain a second voltage; the sampling module 133 may be connected to the voltage stabilizing module 132, and is configured to sample the second voltage and obtain a sampled voltage; wherein, the sampling voltage is used as a bias voltage for the amplification module 131 to work; the amplifying module 131 may be connected to the sampling module 133, and disposed on the second transmission line 16B, and configured to amplify the radio frequency signal output by the signal processing unit 12 according to the sampling voltage, and output the amplified radio frequency signal to the signal switching unit 11.
In one embodiment, as shown in fig. 4, the voltage regulation module 132 may include a voltage regulation chip U6; XC6209 can be adopted as the voltage stabilization chip U6, and other models can be adopted, which is not limited in the application. The sampling module 133 may include a first sampling resistor R7 and a second sampling resistor R8; the amplifying module 131 may include a power amplifying tube Q3; the power amplifier Q3 may be a MOSFET, or may be other amplifier modules 131, which is not limited in this application. The output end of the voltage stabilizing chip U6 is connected with one end of the first sampling resistor R7, the other end of the first sampling resistor R7 is connected with the control end of the power amplifying tube Q3 and one end of the second sampling resistor R8, and the other end of the second sampling resistor R8 is connected with the ground.
Further, in this embodiment, the voltage regulation chip U6 employs XC6209, and provides the bias voltage for the power amplifier Q3 to operate through the sampling module 133, and turns off the transmitting circuit when the wireless communication module 1 is in a receiving state.
Further, the voltage stabilizing module 132 may further include a resistor R9, polar capacitors C29 and C40, capacitors C30, C31, C41, C38 and C32, and a magnetic bead L5. The bead L5 can be used to suppress high frequency noise and spike interference on the power line. The 3 rd pin of the regulator chip U6 receives an externally input emission control signal via a resistor R9, and the emission control signal can control whether the regulator chip U6 operates.
Furthermore, because the MOSFET is a voltage control device, when the MOSFET is used as an input stage, the MOSFET does not increase current load for a previous-stage circuit, for example, a measuring instrument can measure real true voltage without consuming preceding-stage current, and the voltage is not slightly pulled down due to the addition of the MOSFET, like a common triode; when the power amplifier is used as a power output stage, a base stage bias current is not needed like a common triode, so that the saved electric energy is considerable for a high-power occasion, and therefore, the power amplifier tube Q3 in the embodiment adopts an NMOS (N-Channel Enhancement Mode MOSFET).
Further, the amplifying module 131 may further include a resistor R4 and a capacitor C14, one end of the resistor R4 is connected to the drain of the power amplifying transistor Q3, the other end of the resistor R4 is connected to one end of the capacitor C14, and the other end of the capacitor C14 is connected to the gate of the power amplifying transistor Q3. The source of the power amplifier Q3 is connected to ground, the drain of the power amplifier Q3 is connected to +5.0V through an inductor L8, the +5.0V is an external input voltage, and the gate of the power amplifier Q3 is connected to ground through a capacitor C13.
In one embodiment, as shown in fig. 2, the signal switching unit 11 may include an antenna matching module 111 and a radio frequency switching module 112. Specifically, the antenna matching module 111 may be connected to the external antenna, and configured to match the external antenna port, so as to improve external antenna efficiency. A radio frequency switching module 112 may be connected to the antenna matching module 111 for switching the external antenna to the first transmission line 16A or the second transmission line 16B.
In an embodiment, the rf switch module 112 includes an rf switch, and the rf switch is an AS179 switch, but may be of other types, which is not limited in this application.
Illustratively, as shown in fig. 4, the antenna matching module 111 may include: capacitors C37, C4, C3, and an inductor L10. The rf switch U3 employs AS 179. Specifically, the 5 th pin of the radio frequency switch U3 is connected to one end of a capacitor C3, the other end of a capacitor C3 is connected to one end of an inductor L10 and is connected to ground via a capacitor C4, and the other end of an inductor L10 is connected to an external antenna ANT and is connected to ground via a capacitor C37; a 6 th pin of the radio frequency switch U3 receives an externally input transmission control signal TX _ EN and is connected to the ground through a capacitor C7; the 4 th pin of the rf switch U3 receives an externally input reception control signal RX _ EN, and is connected to ground via a capacitor C6, the 2 nd pin of the rf switch U3 is connected to ground, the 1 st pin of the rf switch U3 is connected to the first transmission line 16A, and the 3 rd pin of the rf switch U3 is connected to the second transmission line 16B.
The signal switching unit 11 in this embodiment can be based on the wireless communication module 1 works when different states switches to corresponding transmission lines, and realizes the separation of the transmitting signal and the receiving signal, so that the transmitting signal and the receiving signal are not disordered, the transceiving function of the wireless communication module 1 is realized, the matching of the external antenna port can be realized, and the external antenna efficiency can be improved.
In one embodiment, the signal processing unit 12 includes a radio frequency chip, and the radio frequency chip may adopt SX1278, where SX1278 is a radio frequency chip of Semtech corporation in the united states, and adopts an advanced LoRa modulation technology, and the anti-interference performance and the communication distance of the radio frequency chip far exceed the products of the current FSK and GFSK modulation modes. The SX1278 has the characteristics of low power consumption, long transmission distance, strong anti-jamming capability and the like, and can be widely applied to various wireless communication fields of the Internet of things. Of course, other models can be adopted, and the application is not limited.
Further, referring to fig. 4, the 1 st pin of the rf chip U2 is a signal receiving terminal and is connected to the first transmission line 16A, and the 27 th pin of the rf chip U2 is a signal transmitting terminal and is connected to the second transmission line 16B. Pins 16-19 of the radio frequency chip U2 are SPI interfaces for data interaction with the external control device 2. The 8 th to 13 th pins of the radio frequency chip U2 are digital I/O interfaces, which are extended functions of the wireless communication module 1 and can be used for indication, sensitivity test, and the like according to the needs of a user. The 5-6 pins of the radio frequency chip U2 are connected with a crystal oscillator module, which may include capacitors C18, C9 and a patch quartz crystal oscillator Y1, and provides a stable clock source of 32MHz to the radio frequency chip U2.
Referring to fig. 4, the working principle of the present embodiment is as follows:
when the wireless communication module 1 is in a receiving state, that is, when the wireless communication module 1 is used as a wireless receiving module, the external input receiving control signal RX _ EN is set to a high logic level, the transmitting control signal TX _ EN is set to a low logic level, at this time, the 5 th pin of the radio frequency switch U3 is connected with the 1 st pin, the external antenna ANT is connected with the first transmission line 16A through the 5 th pin and the 1 st pin of the radio frequency switch U3, and the first transmission line 16A is connected with the 1 st pin (signal receiving end) of the radio frequency chip U2. Meanwhile, as the emission control signal TX _ EN is set to a low logic level, the voltage regulation chip U6 turns off the output, and the voltage regulation chip U6 does not provide a bias voltage to the power amplifier tube Q3, so that the power amplifier tube Q3 does not work and the emission circuit is turned off. The radio frequency chip U2 converts the radio frequency signal transmitted by the first transmission line 16A (i.e., the radio frequency signal received by the external antenna ANT) into a digital signal and outputs the digital signal to the external control device 2, thereby implementing a wireless receiving function.
When the wireless communication module 1 is in a transmitting state, that is, when the wireless communication module 1 is used as a wireless transmitting module, the external input receiving control signal RX _ EN is set to a low logic level, the transmitting control signal TX _ EN is set to a high logic level, at this time, the 5 th pin and the 3 rd pin of the rf switch U3 are connected, the external antenna ANT is connected with the second transmission line 16B through the 5 th pin and the 3 rd pin of the rf switch U3, the second transmission line 16B is connected with the 27 th pin (signal transmitting end) of the rf chip U2, and meanwhile, since the transmitting control signal TX _ EN is set to a high logic level, the voltage stabilizing chip U6 is turned on, the voltage stabilizing chip U6 provides a bias voltage to the power amplifying tube Q3 through the sampling module 133 formed by R7 and R8, so that the power amplifying tube Q3 operates, thereby amplifying the rf signal output by the rf chip U2 and outputting the amplified rf signal to the rf switch U3, through the 3 rd pin and the 5 th pin of the radio frequency switch U3 and the external antenna ANT, the wireless transmitting function is realized.
In one embodiment, the signal processing unit 12 outputs the digital signal through an SPI interface, and inputs a control signal; wherein, the control signal is used to control the signal processing unit 12 to output a radio frequency signal. The signal processing unit 12 can perform data interaction with the external control device 2 through the SPI interface.
In one embodiment, as shown in fig. 3, the wireless communication module 1 may further include: a first matching unit 14 and a second matching unit 15, the first matching unit 14 may be disposed on the first transmission line 16A; a second matching unit 15 may be arranged on said second transmission line 16B.
In one embodiment, as shown in fig. 3, the first matching unit 14 may include a first impedance matching module connected between the signal switching unit 11 and the signal processing unit 12; the second matching unit 15 may include a second impedance matching module connected between the signal amplifying unit 13 and the signal switching unit 11.
Exemplarily, referring to fig. 4, the first impedance matching module may include: capacitors C24, C2, C8, and an inductor L2. The second impedance matching module may include: capacitors C1, C17, C22, C34, C10, and inductors L11, L9.
Further, the second matching unit 15 may further include: the capacitor comprises capacitors C23, C25, C36, C13, C16, C11 and C12, inductors L4, L1 and L3, wherein the capacitors C23, C25 and C36 are coupling capacitors.
In one embodiment, the wireless communication module 1 may further include a power conversion module, which is configured to supply power to the signal processing unit 12.
For example, referring to fig. 4, the power conversion module may include a three-terminal regulator U1, polar capacitors C33, C28, capacitors C35, C39, and a magnetic bead L6. The bead L6 can be used to suppress high frequency noise and spike interference on the power line. The +5.0V voltage inputted from the outside may be converted into a 3.3V voltage to be supplied to the signal processing unit 12.
In one embodiment, as shown in FIG. 5, FIG. 5 is a block diagram of a wireless communication module in one embodiment.
In the figure, the 1 st pin TX _ EN is a transmission enable pin (high level enable), the 2 nd pin RESET is a chip RESET pin, the 3 rd to 8 th pins are digital I/O ports and can be used for functions such as receiving and transmitting indication, sensitivity test and the like, the 9 th pin RX _ EN is a receiving enable pin (high level enable), the 10 th pin RXTX _ RF is an antenna switch control pin (high level TX), the 11 th to 14 th pins are SPI communication pins, the 15 th, 18 th and 19 th pins GND are signal grounds, the 16 th pin VCC is a power supply, and the 17 th pin is used for connecting an external antenna.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A wireless communication module, comprising:
the signal switching unit is connected with an external antenna and used for switching the external antenna to the first transmission line or the second transmission line; the first transmission line is used for transmitting radio frequency signals when the wireless communication module works in a receiving state; the second transmission line is used for transmitting radio frequency signals when the wireless communication module works in a transmitting state;
the signal processing unit is connected with the first transmission line and the second transmission line, and is used for converting the radio-frequency signals transmitted by the first transmission line into digital signals to be output when the wireless communication module is in a receiving state and outputting the radio-frequency signals to the second transmission line when the wireless communication module is in a transmitting state; and
and the signal amplification unit is arranged on the second transmission line and used for amplifying the radio-frequency signal output by the signal processing unit and outputting the radio-frequency signal to the signal switching unit when the wireless communication module works in a transmitting state.
2. The wireless communication module according to claim 1, wherein the signal amplification unit comprises:
the voltage stabilizing module is used for carrying out voltage reduction and voltage stabilization on the first voltage and obtaining a second voltage;
the sampling module is connected with the voltage stabilizing module and used for sampling the second voltage and obtaining a sampling voltage; the sampling voltage is used as a bias voltage for the work of the amplification module; and
the amplifying module is connected with the sampling module, arranged on the second transmission line and used for amplifying the radio-frequency signal output by the signal processing unit according to the sampling voltage and then outputting the radio-frequency signal to the signal switching unit.
3. The wireless communication module of claim 2,
the voltage stabilization module includes: a voltage stabilization chip;
the sampling module comprises: a first sampling resistor and a second sampling resistor;
the amplification module includes: a power amplifier tube;
the output end of the voltage stabilizing chip is connected with one end of the first sampling resistor, the other end of the first sampling resistor is connected with the control end of the power amplifying tube and one end of the second sampling resistor, and the other end of the second sampling resistor is connected with the ground.
4. The wireless communication module of claim 3,
the voltage stabilizing chip adopts XC 6209;
the power amplifier tube adopts an NMOS tube.
5. The wireless communication module according to claim 1, wherein the signal switching unit comprises:
the antenna matching module is connected with the external antenna and used for matching the external antenna port;
and the radio frequency switch module is connected with the antenna matching module and is used for switching the external antenna to the first transmission line or the second transmission line.
6. The wireless communication module of claim 5,
the radio frequency switch module comprises a radio frequency switch, and the radio frequency switch adopts AS 179.
7. The wireless communication module of claim 1,
the signal processing unit includes: the radio frequency chip adopts SX 1278.
8. The wireless communication module of claim 1,
the signal processing unit outputs the digital signal and inputs a control signal through an SPI interface; the control signal is used for controlling the signal processing unit to output a radio frequency signal.
9. The wireless communication module of claim 1, further comprising:
a first matching unit provided on the first transmission line;
and a second matching unit disposed on the second transmission line.
10. The wireless communication module of claim 9,
the first matching unit includes: a first impedance matching module connected between the signal switching unit and the signal processing unit;
the second matching unit includes: and the second impedance matching module is connected between the signal amplifying unit and the signal switching unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120765975.9U CN214799477U (en) | 2021-04-14 | 2021-04-14 | Wireless communication module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120765975.9U CN214799477U (en) | 2021-04-14 | 2021-04-14 | Wireless communication module |
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| Publication Number | Publication Date |
|---|---|
| CN214799477U true CN214799477U (en) | 2021-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120765975.9U Expired - Fee Related CN214799477U (en) | 2021-04-14 | 2021-04-14 | Wireless communication module |
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| CN (1) | CN214799477U (en) |
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- 2021-04-14 CN CN202120765975.9U patent/CN214799477U/en not_active Expired - Fee Related
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