CN114615810A - WiFi module integrated circuit layout method - Google Patents

WiFi module integrated circuit layout method Download PDF

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Publication number
CN114615810A
CN114615810A CN202210379598.4A CN202210379598A CN114615810A CN 114615810 A CN114615810 A CN 114615810A CN 202210379598 A CN202210379598 A CN 202210379598A CN 114615810 A CN114615810 A CN 114615810A
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module
wifi
wiring
circuit
interval size
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CN114615810B (en
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汪换名
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Ouzhitong Technology Co ltd
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Ouzhitong Technology Co ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/0002—Apparatus or processes for manufacturing printed circuits for manufacturing artworks for printed circuits
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • 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

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Design And Manufacture Of Integrated Circuits (AREA)
  • Semiconductor Integrated Circuits (AREA)

Abstract

The application discloses a WiFi module integrated circuit layout method, which comprises the following steps: selecting and matching proper PCB boards and electronic components according to the specification and model of the WiFi module and an electronic circuit schematic diagram thereof, and designing and distributing the PCB boards; then, determining the number of laminated layers and the laminated structure based on the wiring density of the electronic circuit, and planning a device layer, a planar power supply layer and a wiring layer; presetting interval size, and dividing each unit in the module into areas according to a division criterion; then, arranging a main control IC, a power supply part, a crystal, a WiFi transmitting and receiving circuit and a module antenna in the module in a preset area according to the divided areas; and finally, according to the connection relation of the lines, wiring and connecting the components in each area and the module, and outputting a board making file after finishing wiring and connecting. Compared with the prior art, the technical scheme provided by the invention can enable the module to obtain the best performance index through reasonable layout, and improve the working stability and anti-interference performance of the module.

Description

WiFi module integrated circuit layout method
Technical Field
The present application relates to the field of module integrated circuit layout technologies, and more particularly, to a WiFi module integrated circuit layout method.
Background
The Wi-Fi module belongs to an internet of things transmission layer, has the functions of converting a serial port or TTL level into an embedded module which accords with a Wi-Fi wireless network communication standard, is internally provided with a wireless network protocol IEEE802.11b.g.n protocol stack and a TCP/IP protocol stack, and is directly welded on a mainboard by generally adopting a bonding pad connection mode or is connected to the mainboard through a contact pin and other connecting devices.
At present, the WiFi module product is developing towards high integration trends such as small size, dense devices, high performance index requirement, and the WiFi module product size is little can produce a series of problems: firstly, temperature rise caused by poor heat dissipation effect and product stability are affected; secondly, mutual interference is generated between the devices and the signal lines due to too dense arrangement, and the product performance is influenced; thirdly, the distance between the components is too small, so that the requirement on the production process is too high, and the production efficiency is influenced to a certain extent; in summary, product size is in an inverse relationship to WiFi performance and reliability stability. High integration, small-size WiFi products put higher demands on PCB circuit layout.
Therefore, it is a technical problem to be solved by those skilled in the art how to provide a layout method for WiFi module integrated circuit, which can make the module obtain the best performance index through reasonable layout, and improve the working stability and anti-interference performance of the module.
Disclosure of Invention
In order to solve the technical problem, the application provides a layout method for a WiFi module integrated circuit, which can enable a module to obtain an optimal performance index through reasonable layout, and improve the working stability and anti-interference performance of the module.
The first technical scheme provided by the application is as follows:
the application provides a WiFi module integrated circuit layout method, which comprises the following steps: s1, component configuration: selecting and matching proper PCB boards and electronic components according to the specification and model of the WiFi module and an electronic circuit schematic diagram thereof, and designing and distributing the PCB boards; s2, stack design: then, determining the number of laminated layers and the laminated structure based on the wiring density of the electronic circuit, and planning a device layer, a planar power supply layer and a wiring layer; the step of planning the wiring layer specifically comprises the following steps: s201, determining the wiring priority of electronic circuits of the components according to the installation positions, the connection relation and the wiring rules of the electronic components; s202, then based on the determined wiring priority, the wiring layer is planned into gradient layers of different levels, wherein the gradient layers comprise an optimal wiring layer and a second optimal wiring layer; s203, setting the optimal wiring layer to be a complete ground plane with the adjacent surface, and then setting the optimal wiring layer to be used for placing important differential signal lines and analog signal lines; the suboptimal wiring layer is used for arranging connecting wires for the power supply configuration wires, the signal transmission wires and the module components; s3, area division: presetting interval size, and dividing each unit in the module into areas according to a division criterion; s4, module distribution: then arranging a main control IC, a power supply part, a crystal and a WiFi transmitting and receiving circuit in the module in a preset area according to the divided areas; then, installing the module antenna based on the first layout mode or the second layout mode; s5, communicating each area with the unit module: and finally, according to the connection relation of the lines, wiring and connecting the components in each area and the module, and outputting a board making file after finishing wiring and connecting.
Further, in a preferred embodiment of the present invention, the partition criterion specifically includes: dividing the region interval: and partitioning the high-speed unit and the low-speed unit, the analog unit and the digital unit, and the interference source and the sensitive receptor.
Further, in a preferred embodiment of the present invention, in step S3, the area dividing specifically includes:
s301, presetting a first interval size, a second interval size and a third interval size, wherein the third interval size is larger than the second interval size and larger than the first interval size;
s302, determining the length and width of a first channel for installing a high-speed unit and a low-speed unit, and isolating the high-speed unit and the low-speed unit according to the first interval size and the length and width of the first channel;
s303, determining the length and width of a second channel for installing the analog unit and the digital unit, and isolating the analog unit and the digital unit according to the second interval size and the length and width of the second channel;
s304, presetting a third interval size, determining the length and width of a third channel for installing the interference source and the sensitive receptor, and isolating the interference source and the sensitive receptor according to the third interval size and the length and width of the third channel.
Further, in a preferred embodiment of the present invention, in step S4, the specific steps of module distribution are as follows: arranging a plurality of power supply part installation positions, and arranging the main control IC on the PCB in the center, wherein the power supply part, the crystal and the WiFi circuit are installed in a surrounding manner by taking the main control IC as the center;
and then, the antenna is arranged on the same side of the WiFi circuit mounting position and is connected with the main control IC through the WiFi circuit.
Further, in a preferred embodiment of the present invention, the first layout mode specifically includes: the module antenna is directly arranged on the module body; the module antenna installation part belongs to the forbidden gap area, follows the antenna clearance principle, and avoids other components on the PCB board from interfering with the forbidden gap area.
Further, in a preferred mode of the present invention, the second layout mode specifically includes: the PCB at the same side of the WiFi circuit mounting position is provided with a module welding point, and the module antenna is led out through the module welding point on the module body and connected to the outside of the module body.
Further, in a preferred mode of the present invention, in the first layout mode and the second layout mode, the crystal and the power supply section are installed away from the WiFi circuit; the surrounding direction of the WiFi circuit follows an avoidance principle, devices which can generate interference are not placed, and the WiFi circuit is installed in a controlled manner in an avoidance mode and filled with GND copper sheets.
Further, in a preferred embodiment of the present invention, the step S5 further includes: when wiring is communicated, 50R impedance control is carried out on the WIFI signal line, differential impedance control is carried out on the USB signal line, and ground covering processing is carried out on the special signal line.
Compared with the prior art, the layout method of the WiFi module integrated circuit provided by the invention comprises the following steps: s1, component configuration: selecting and matching proper PCB boards and electronic components according to the specification and model of the WiFi module and an electronic circuit schematic diagram thereof, and designing and distributing the PCB boards; s2, stack design: then, determining the number of laminated layers and the laminated structure based on the wiring density of the electronic circuit, and planning a device layer, a planar power supply layer and a wiring layer; the step of planning the wiring layer specifically comprises the following steps: s201, determining the wiring priority of electronic circuits of the components according to the installation positions, the connection relation and the wiring rules of the electronic components; s202, then based on the determined wiring priority, planning different levels of gradient layers on the wiring layer, wherein the gradient layers comprise an optimal wiring layer and a second optimal wiring layer; s203, setting the optimal wiring layer to be a complete ground plane with the adjacent surface, and then setting the optimal wiring layer to be used for placing important differential signal lines and analog signal lines; the suboptimal wiring layer is used for arranging connecting wires for the power supply configuration wires, the signal transmission wires and the module components; s3, area division: presetting interval size, and dividing each unit in the module into areas according to a division criterion; s4, module distribution: then arranging a main control IC, a power supply part, a crystal and a WiFi transmitting and receiving circuit in the module in a preset area according to the divided areas; then, installing the module antenna based on the first layout mode or the second layout mode; s5, communicating each area with the unit module: and finally, according to the connection relation of the lines, wiring and connecting the components in each area and the module, and outputting a board making file after finishing wiring and connecting. Compared with the prior art, the technical scheme provided by the invention can enable the module to obtain the best performance index through reasonable layout, and improve the working stability and anti-interference performance of the module.
Has the advantages that:
1. according to the WiFi module integrated circuit layout method, the modules are layered through the laminated design, and wiring can be performed through dividing the areas and the channels, so that the performance of signal transmission of the modules is more stable, and interference of other units of the modules can be avoided;
2. according to the WiFi module integrated circuit layout method, the performance of the system is improved through reasonable layout, the optimal index is obtained, the product works stably, and the WiFi module integrated circuit layout method is suitable for different environment working temperatures.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart illustrating steps of a layout method for a WiFi module integrated circuit according to an embodiment of the present invention;
fig. 2 is a flowchart of a step of planning the routing layer according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating the steps of area partitioning according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first layout mode according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second layout mode according to an embodiment of the present invention;
fig. 6 is a diagram illustrating the processing of a special signal line packet according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, 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 embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.
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 one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
The layout method of the WiFi module integrated circuit provided by the embodiment of the application comprises the following steps: s1, component configuration: selecting and matching proper PCB boards and electronic components according to the specification and model of the WiFi module and an electronic circuit schematic diagram thereof, and designing and distributing the PCB boards; s2, stack design: then, determining the number of laminated layers and the laminated structure based on the wiring density of the electronic circuit, and planning a device layer, a planar power supply layer and a wiring layer; the step of planning the wiring layer specifically comprises the following steps: s201, determining the wiring priority of electronic circuits of the components according to the installation positions, the connection relation and the wiring rules of the electronic components; s202, then based on the determined wiring priority, planning different levels of gradient layers on the wiring layer, wherein the gradient layers comprise an optimal wiring layer and a second optimal wiring layer; s203, setting the optimal wiring layer to be a complete ground plane with the adjacent surface, and then setting the optimal wiring layer to be used for placing important differential signal lines and analog signal lines; the suboptimal wiring layer is used for arranging connecting wires for the power supply configuration wires, the signal transmission wires and the module components; s3, area division: presetting interval size, and dividing each unit in the module into areas according to a division criterion; s4, module distribution: then arranging a main control IC, a power supply part, a crystal and a WiFi transmitting and receiving circuit in the module in a preset area according to the divided areas; then, installing the module antenna based on the first layout mode or the second layout mode; s5, communicating each area with the unit module: and finally, according to the connection relation of the lines, wiring and connecting the components in each area and the module, and outputting a board making file after finishing wiring and connecting. According to the WiFi module integrated circuit layout method, the modules are layered through the laminated design, and wiring can be performed through dividing the areas and the channels, so that the performance of signal transmission of the modules is more stable, and interference of other units of the modules can be avoided; and the performance of the system is improved through reasonable layout, the optimal index is obtained, the product works stably, and the system is suitable for different environment working temperatures. Compared with the prior art, the technical scheme provided by the invention can enable the module to obtain the best performance index through reasonable layout, and improve the working stability and anti-interference performance of the module.
Specifically, as shown in fig. 1 to 6, the method for quickly calculating the mixed lubrication wear of the high-precision spherical friction pair provided by the embodiment of the present application specifically includes the following steps:
s1, component configuration: according to the specification and the model of the WiFi module and an electronic circuit schematic diagram of the WiFi module, a proper PCB and electronic components are selected and matched, and the PCB is designed and distributed.
S2, stack design: and then determining the number of laminated layers and the laminated structure based on the wiring density of the electronic circuit, and planning a device layer, a planar power supply layer and a wiring layer.
Specifically, in the embodiment of the present invention, in the step S2, the step of planning the routing layer specifically includes: s201, determining the wiring priority of electronic circuits of the components according to the installation positions, the connection relation and the wiring rules of the electronic components; s202, then based on the determined wiring priority, the wiring layer is planned into gradient layers of different levels, wherein the gradient layers comprise an optimal wiring layer and a second optimal wiring layer; s203, setting the optimal wiring layer to be a complete ground plane with the adjacent surface, and then setting the optimal wiring layer to be used for placing important differential signal lines and analog signal lines; the second optimal wiring layer is used for arranging the connecting wires for connecting the power supply configuration wires, the signal transmission wires and the module components.
In the stack design, a device layer, a planar power supply layer and wiring layers are planned, namely all the wiring layers are planned as follows: an optimal routing layer, a suboptimal routing layer, etc.; the optimal wiring layer, namely the complete ground plane of the adjacent interview, is used for placing important signal line differential signals, analog signals and the like in the embodiment; secondly, it is just as good that general WIFI module all needs to do impedance matching, for example single line 50R etc.. Thus, a precondition for the laminate to be excellent in stability of the performance of the entire module was determined.
S3, area division: and presetting the interval size, and dividing the area of each unit in the module according to a division rule.
Specifically, in the embodiment of the present invention, the partition criterion specifically is: dividing the region interval: and partitioning the high-speed unit and the low-speed unit, the analog unit and the digital unit, and the interference source and the sensitive receptor.
Specifically, in the embodiment of the present invention, in the step S3, the specific step of dividing the area includes: s301, presetting a first interval size, a second interval size and a third interval size, wherein the third interval size is larger than the second interval size and larger than the first interval size; s302, determining the length and width of a first channel for installing a high-speed unit and a low-speed unit, and isolating the high-speed unit and the low-speed unit according to the first interval size and the length and width of the first channel; s303, determining the length and width of a second channel for installing the analog unit and the digital unit, and isolating the analog unit and the digital unit according to the second interval size and the length and width of the second channel; s304, presetting a third interval size, determining the length and width of a third channel for installing the interference source and the sensitive receptor, and isolating the interference source and the sensitive receptor according to the third interval size and the length and width of the third channel.
In the area division, the following basic principles are followed: high-speed and low-speed subareas, analog and digital subareas, and interference source and sensitive receptor subareas;
in the embodiment of the invention, because the sensitive part has weak interference resistance, the interference source and the sensitive part need to be separated by a proper distance to prevent interference, thereby affecting the performance index and the stability of the system.
S4, module distribution: then arranging a main control IC, a power supply part, a crystal and a WiFi transmitting and receiving circuit in the module in a preset area according to the divided areas; the module antenna is then installed based on the first layout pattern or the second layout pattern.
Specifically, in the embodiment of the present invention, in the step S4, the specific steps of the module distribution are: arranging a plurality of power supply part installation positions, and arranging the main control IC on the PCB in the center, wherein the power supply part, the crystal and the WiFi circuit are installed in a surrounding manner by taking the main control IC as the center;
and then, the antenna is arranged on the same side of the WiFi circuit mounting position and is connected with the main control IC through the WiFi circuit.
Specifically, in the embodiment of the present invention, the first layout mode specifically is: the module antenna is directly arranged on the module body; the module antenna installation part belongs to the forbidden gap area, follows the antenna clearance principle, and avoids other components on the PCB board from interfering with the forbidden gap area.
Specifically, in the embodiment of the present invention, the second layout mode specifically is: the PCB at the same side of the WiFi circuit mounting position is provided with a module welding point, and the module antenna is led out through the module welding point on the module body and connected to the outside of the module body.
In the embodiment of the invention, the WIFI module comprises a main control IC, a power supply part, a WiFi circuit (including a receiving device circuit and a transmitting device circuit) and an antenna.
The WiFi module has two main modes, as shown in fig. 4 and 5:
the first layout mode is that the WiFi module antenna is arranged on the module body;
the second layout mode is that the wiFi module antenna passes through a welding point connection on the module body and is outside the body. In the above two modes, the WiFi circuit and the antenna belong to the key protection part,
the antenna part in the first WiFi module layout belongs to an forbidden space area, and the interference caused by other components on the PCB board is avoided according to the antenna clearance principle. The A, B, C orientation of the WiFi circuit does not place interference producing devices. Keeping away the space as much as possible under controllable condition, and filling with GND copper sheet.
The periphery of the WiFi circuit in the second WiFi module layout follows the layout of the first approach.
Because crystal, power part all have certain interference in the wiFi module, in the whole overall layout of wiFi module, these two parts need follow and keep away from wiFi circuit part. The power supply parts should be placed in the 1, 2 and 3 positions as in fig. 4 and 5.
S5, communicating each area with the unit module: and finally, according to the connection relation of the lines, wiring and connecting the components in each area and the module, and outputting a board making file after finishing wiring and connecting.
Specifically, in the embodiment of the present invention, in the first layout mode and the second layout mode, the crystal, power supply portion is installed away from the WiFi circuit; the surrounding direction of the WiFi circuit follows an avoidance principle, devices which can generate interference are not placed, and the WiFi circuit is installed in a controlled manner in an avoidance mode and filled with GND copper sheets.
Specifically, in the embodiment of the present invention, in the step S5, the method further includes: when wiring is communicated, 50R impedance control is carried out on the WIFI signal line, differential impedance control is carried out on the USB signal line, and ground covering processing is carried out on the special signal line.
The process is to connect signals between each region and the module part through wiring. Special signal lines need to be taken care of during the wiring process. The special signal lines generally have impedance characteristic requirements, for example, 50R impedance control is required for WIFI signal lines, differential impedance control and clock signal lines are required for USB signal lines, and the like. The special signal lines require packet Ground (GND) to handle. As shown in fig. 6.
After the above steps are completed, the layout of the WiFi module integrated circuit is completed, and then special files for manufacturing the circuit board can be output to corresponding manufacturers, so that the manufacturing production of the circuit board is completed.
Therefore, an embodiment of the present invention provides a layout method for a WiFi module integrated circuit, including the following steps: s1, component configuration: selecting and matching proper PCB boards and electronic components according to the specification and model of the WiFi module and an electronic circuit schematic diagram thereof, and designing and distributing the PCB boards; s2, stack design: then, determining the number of laminated layers and the laminated structure based on the wiring density of the electronic circuit, and planning a device layer, a planar power supply layer and a wiring layer; s3, area division: presetting interval size, and dividing each unit in the module into areas according to a division criterion; s4, module distribution: then arranging a main control IC, a power supply part, a crystal and a WiFi transmitting and receiving circuit in the module in a preset area according to the divided areas; then, installing the module antenna based on the first layout mode or the second layout mode; s5, communicating each area with the unit module: and finally, according to the connection relation of the lines, wiring and connecting the components in each area and the module, and outputting a board making file after finishing wiring and connecting. According to the WiFi module integrated circuit layout method, the modules are layered through the laminated design, and wiring can be performed through dividing the areas and the channels, so that the performance of signal transmission of the modules is more stable, and interference of other units of the modules can be avoided; and the performance of the system is improved through reasonable layout, the optimal index is obtained, the product works stably, and the system is suitable for different environment working temperatures. Compared with the prior art, the technical scheme provided by the invention can enable the module to obtain the best performance index through reasonable layout, and improve the working stability and anti-interference performance of the module.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A layout method for a WiFi module integrated circuit is characterized by comprising the following steps:
s1, component configuration: selecting and matching proper PCB boards and electronic components according to the specification and model of the WiFi module and an electronic circuit schematic diagram thereof, and designing and distributing the PCB boards;
s2, stack design: then, determining the number of laminated layers and the laminated structure based on the wiring density of the electronic circuit, and planning a device layer, a planar power supply layer and a wiring layer;
the step of planning the wiring layer specifically comprises the following steps: s201, determining the wiring priority of electronic circuits of the components according to the installation positions, the connection relation and the wiring rules of the electronic components;
s202, then based on the determined wiring priority, the wiring layer is planned into gradient layers of different levels, wherein the gradient layers comprise an optimal wiring layer and a second optimal wiring layer;
s203, setting the optimal wiring layer to be a complete ground plane with the adjacent surface, and then setting the optimal wiring layer to be used for placing important differential signal lines and analog signal lines; the suboptimal wiring layer is used for arranging connecting wires for the power supply configuration wires, the signal transmission wires and the module components;
s3, area division: presetting interval size, and dividing each unit in the module into areas according to a division criterion;
s4, module distribution: then arranging a main control IC, a power supply part, a crystal and a WiFi transmitting and receiving circuit in the module in a preset area according to the divided areas; then, installing the module antenna based on the first layout mode or the second layout mode;
s5, communicating each area with the unit module: and finally, according to the connection relation of the lines, wiring and connecting the components in each area and the module, and outputting a board making file after finishing wiring and connecting.
2. The WiFi module integrated circuit layout method of claim 1, wherein the partition criteria is specifically: dividing the region interval: and partitioning the high-speed unit and the low-speed unit, the analog unit and the digital unit, and the interference source and the sensitive receptor.
3. The WiFi module integrated circuit layout method of claim 2 wherein in the step S3, the area dividing includes:
s301, presetting a first interval size, a second interval size and a third interval size, wherein the third interval size is larger than the second interval size and larger than the first interval size;
s302, determining the length and width of a first channel for installing a high-speed unit and a low-speed unit, and isolating the high-speed unit and the low-speed unit according to the first interval size and the length and width of the first channel;
s303, determining the length and width of a second channel for installing the analog unit and the digital unit, and isolating the analog unit and the digital unit according to the second interval size and the length and width of the second channel;
s304, presetting a third interval size, determining the length and width of a third channel for installing the interference source and the sensitive receptor, and isolating the interference source and the sensitive receptor according to the third interval size and the length and width of the third channel.
4. The WiFi module integrated circuit layout method of claim 1, wherein in the step S4, the specific steps of the module distribution are:
arranging a plurality of power supply part installation positions, and arranging the main control IC on the PCB in the center, wherein the power supply part, the crystal and the WiFi circuit are installed in a surrounding manner by taking the main control IC as the center;
and then, the antenna is arranged on the same side of the WiFi circuit mounting position and is connected with the main control IC through the WiFi circuit.
5. The layout method of the WiFi module integrated circuit of claim 4, wherein the first layout mode is specifically: the module antenna is directly arranged on the module body; the module antenna installation part belongs to the forbidden gap area, follows the antenna clearance principle, and avoids other components on the PCB board from interfering with the forbidden gap area.
6. The layout method of the WiFi module integrated circuit of claim 5, wherein the second layout mode is specifically: the PCB at the same side of the WiFi circuit mounting position is provided with a module welding point, and the module antenna is led out through the module welding point on the module body and connected to the outside of the module body.
7. The WiFi module integrated circuit layout method of claim 6 wherein in the first layout mode and the second layout mode, the crystal, power supply portion are mounted away from the WiFi circuit; the surrounding direction of the WiFi circuit follows an avoidance principle, devices which can generate interference are not placed, and the WiFi circuit is installed in a controlled manner in an avoidance mode and filled with GND copper sheets.
8. The WiFi module integrated circuit layout method of claim 1, in the step S5, further comprising: when wiring is communicated, 50R impedance control is carried out on the WIFI signal line, differential impedance control is carried out on the USB signal line, and ground covering processing is carried out on the special signal line.
CN202210379598.4A 2022-04-12 2022-04-12 WiFi module integrated circuit layout method Active CN114615810B (en)

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US20210075088A1 (en) * 2019-09-05 2021-03-11 Apple Inc. Integrated Millimeter Wave Antenna Modules
CN113258951A (en) * 2021-04-29 2021-08-13 深圳市锐明技术股份有限公司 WiFi circuit, WiFi module and WiFi debugging method
CN214254730U (en) * 2020-08-28 2021-09-21 惠州高盛达科技有限公司 Bluetooth WiFi module

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Publication number Priority date Publication date Assignee Title
CN107135600A (en) * 2017-07-10 2017-09-05 北京小米移动软件有限公司 WiFi mould-group circuit-boards
CN208227016U (en) * 2018-04-28 2018-12-11 惠州高盛达科技有限公司 The WIFI mould group of separate type
US20210075088A1 (en) * 2019-09-05 2021-03-11 Apple Inc. Integrated Millimeter Wave Antenna Modules
CN214254730U (en) * 2020-08-28 2021-09-21 惠州高盛达科技有限公司 Bluetooth WiFi module
CN113258951A (en) * 2021-04-29 2021-08-13 深圳市锐明技术股份有限公司 WiFi circuit, WiFi module and WiFi debugging method

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