Non-contact antenna layout method and device and storage medium

Abstract

The invention discloses a non-contact antenna layout method and device and a storage medium. The method and the device are used for reducing signal blind spots in a non-contact antenna working area and improving payment efficiency and user payment experience. The method comprises the following steps: acquiring field intensity distribution information of a non-contact antenna on a mainboard of a terminal, wherein the field intensity distribution information is information obtained through simulation; determining a field intensity area to be optimized in the mainboard according to the field intensity distribution information; and performing adjustment operation on the non-contact antenna in the to-be-optimized field intensity area, wherein the adjustment operation comprises adjusting the wiring mode of the non-contact antenna from linear wiring to spiral wiring and adjusting the physical parameters of the non-contact antenna.

Description

Technical Field

[0001] The present application relates to the field of electronic engineering technology, and in particular to a method, device and storage medium for non-connected antenna layout. Background Art

[0002] At present, more and more electronic payment terminals are beginning to support contactless payment, which has been widely used in public transportation, supermarkets, restaurants and other fields. Contactless payment refers to a way of completing payment without physical contact. Near field communication technology NFC is a short-range wireless communication technology that can transmit and exchange data between terminals and is one of the technologies to achieve contactless payment.

[0003] Usually, a contactless antenna is arranged in the NFC scanning area of ​​an electronic payment terminal. When a user makes a contactless payment, he only needs to place a mobile phone or other mobile terminal that supports contactless payment close to the scanning area of ​​the electronic payment terminal. The electronic payment terminal authenticates the user's payment information through the contactless antenna and completes the payment.

[0004] However, the overall structure of the electronic payment terminal is complex, and there may be other metal components near the non-contact antenna. When current passes through these metal components, it will generate its own magnetic field around it, causing eddy currents, thereby changing the electric field strength of the non-contact antenna. This will cause the electronic payment terminal to have signal blind spots in actual use, affecting the user's payment experience. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a non-contact antenna layout method, device and storage medium.

[0006] The technical solution provided in this application is described below:

[0007] A first aspect of the present application provides a method for non-connected antenna layout, the method comprising:

[0008] Acquire field strength distribution information of a non-connected antenna on a mainboard of a terminal, wherein the field strength distribution information is information obtained through simulation;

[0009] Determining a field strength area to be optimized in the mainboard according to the field strength distribution information;

[0010] An adjustment operation is performed on the non-contact antenna in the field strength area to be optimized, wherein the adjustment operation includes adjusting the routing mode of the non-contact antenna from a straight line to a spiral line and adjusting physical parameters of the non-contact antenna.

[0011] Optionally, the performing an adjustment operation on the non-connected antenna in the field strength area to be optimized includes:

[0012] Determining an adjustment target for the field intensity area to be optimized;

[0013] Calculating physical parameters of the non-contact antenna according to the adjustment target, the physical parameters including coil size, number of turns and spacing;

[0014] The routing mode of the non-connected antenna in the field strength area to be optimized is adjusted from a straight line to a spiral line according to the physical parameters.

[0015] Optionally, when the adjustment target is to enhance the field strength, the spiral alignment is a co-directional spiral alignment;

[0016] When the adjustment target is to weaken the field strength, the spiral routing is a reverse spiral routing.

[0017] Optionally, determining the field strength area to be optimized in the mainboard according to the field strength distribution information includes:

[0018] Determine field strength thresholds for different areas in the mainboard based on EMV certification requirements;

[0019] According to the field strength distribution information, an area that does not meet the field strength threshold is determined as a field strength area to be optimized in the mainboard.

[0020] Optionally, determining the field strength area to be optimized in the mainboard according to the field strength distribution information includes:

[0021] Performing a field intensity uniformity check according to the field intensity distribution information;

[0022] The area that fails the field strength uniformity check is determined as the field strength area to be optimized in the mainboard.

[0023] Optionally, the acquiring the field strength distribution information of the non-connected antenna on the mainboard of the terminal includes:

[0024] Define the component material properties of the non-contact antenna according to the terminal's overall environment and build a non-contact antenna model;

[0025] Setting a simulation environment for the non-connected antenna model;

[0026] The non-contact antenna model is simulated according to the simulation environment to obtain field strength distribution information of the non-contact antenna on the mainboard of the terminal.

[0027] Optionally, setting a simulation environment for the non-connected antenna model includes:

[0028] The simulation excitation, field monitor, grid, solver, operating frequency, boundary conditions and convergence parameters of the non-connected antenna model are set.

[0029] A second aspect of the present application provides a device for a non-connected antenna layout, the device comprising:

[0030] An acquisition unit, used to acquire field strength distribution information of a non-connected antenna on a mainboard of a terminal, wherein the field strength distribution information is information obtained through simulation;

[0031] A determination unit, configured to determine a field strength area to be optimized on the mainboard according to the field strength distribution information;

[0032] The adjustment unit is used to perform an adjustment operation on the non-contact antenna in the field strength area to be optimized, wherein the adjustment operation includes adjusting the routing mode of the non-contact antenna from a straight line to a spiral line and adjusting the physical parameters of the non-contact antenna.

[0033] Optionally, the adjustment unit is further used for:

[0034] Determining an adjustment target for the field intensity area to be optimized;

[0035] Calculating physical parameters of the non-contact antenna according to the adjustment target, the physical parameters including coil size, number of turns and spacing;

[0036] The routing mode of the non-connected antenna in the field strength area to be optimized is adjusted from a straight line to a spiral line according to the physical parameters.

[0037] Optionally, the adjustment unit is further used for:

[0038] When the adjustment target is to enhance the field strength, the spiral alignment is a co-directional spiral alignment;

[0039] When the adjustment target is to weaken the field strength, the spiral routing is a reverse spiral routing.

[0040] Optionally, the determining unit is further configured to:

[0041] Determine field strength thresholds for different areas in the mainboard based on EMV certification requirements;

[0042] According to the field strength distribution information, an area that does not meet the field strength threshold is determined as a field strength area to be optimized in the mainboard.

[0043] Optionally, the determining unit is further configured to:

[0044] Performing a field intensity uniformity check according to the field intensity distribution information;

[0045] The area that fails the field strength uniformity check is determined as the field strength area to be optimized in the mainboard.

[0046] Optionally, the acquisition unit is further used for:

[0047] Define the component material properties of the non-contact antenna according to the terminal's overall environment and build a non-contact antenna model;

[0048] Setting a simulation environment for the non-connected antenna model;

[0049] The non-contact antenna model is simulated according to the simulation environment to obtain field strength distribution information of the non-contact antenna on the mainboard of the terminal.

[0050] Optionally, the acquisition unit is further used for:

[0051] The simulation excitation, field monitor, grid, solver, operating frequency, boundary conditions and convergence parameters of the non-connected antenna model are set.

[0052] A third aspect of the present application provides a device for a non-contact antenna layout, the device comprising:

[0053] Processor, memory, input-output unit, and bus;

[0054] The processor is connected to the memory, the input and output unit, and the bus;

[0055] The memory stores a program, and the processor calls the program to execute the first aspect and any optional method in the first aspect.

[0056] A fourth aspect of the present application provides a computer-readable storage medium, on which a program is stored. When the program is executed on a computer, the program executes the first aspect and any optional method in the first aspect.

[0057] It can be seen from the above technical solutions that this application has the following advantages:

[0058] By obtaining the field strength distribution information of the non-contact antenna on the mainboard of the terminal, the field strength area to be optimized of the non-contact antenna is determined from the field strength distribution information, and the non-contact antenna's straight line alignment in the field strength area to be optimized is adjusted to a spiral alignment according to the alignment method and physical parameters of the non-contact antenna in the field strength area to be optimized, so that the electromagnetic characteristics such as the electromagnetic field distribution and field strength in the field strength area to be optimized are optimized, and the efficiency and performance of the non-contact antenna are improved. By changing the alignment method of the non-contact antenna and adjusting the field strength of each location of the non-contact antenna, the non-contact antenna signal can cover the working area, improving payment efficiency and user payment experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solution in the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0060] Figure 1 A schematic diagram of an embodiment of a method for non-connected antenna layout provided in the present application;

[0061] Figure 2 A schematic diagram of a flow chart of an embodiment of performing an adjustment operation in the method for non-connected antenna layout provided in the present application;

[0062] Figure 3 A schematic diagram of an embodiment of a flow chart of adjusting the spiral routing direction in the method for layout of a non-connected antenna provided in the present application;

[0063] Figure 4 A schematic structural diagram of an embodiment of a routing method after an adjustment operation is performed in the method for layout of a non-connected antenna provided in the present application;

[0064] Figure 5 A schematic diagram of a flow chart of an embodiment of determining a field strength area to be optimized in a method for non-connected antenna layout provided in the present application;

[0065] Figure 6 A schematic flow chart of another embodiment of determining a field strength area to be optimized in the method for non-connected antenna layout provided in the present application;

[0066] Figure 7 A schematic diagram of an embodiment of the whole machine electromagnetic field simulation process in the method for non-connected antenna layout provided in the present application;

[0067] Figure 8 A schematic diagram of the structure of an embodiment of a device for a non-connected antenna layout provided in the present application;

[0068] Fig. 9 A schematic structural diagram of another embodiment of the device for the non-connected antenna layout provided in the present application. DETAILED DESCRIPTION

[0069] It should be noted that the method, device and storage medium for non-contact antenna layout provided in this application can be applied to a terminal, a system or a server. For example, the terminal can be a smart phone or a computer, a tablet computer, a portable computer terminal or a fixed terminal such as a desktop computer. For the convenience of explanation, this application uses the terminal as an example for the execution subject.

[0070] See also Figure 1 , Figure 1 An embodiment of a method for layout of a non-connected antenna provided in the present application includes:

[0071] S101, obtaining field strength distribution information of a non-connected antenna on a mainboard of a terminal, where the field strength distribution information is information obtained through simulation;

[0072] Contactless antennas are classified into near field communication NFC antennas, Bluetooth antennas, etc., and are widely used. For example, NFC antennas are responsible for wireless communication between terminals and can be used to support terminal functions such as mobile payment, access control systems, and bus cards. In order to ensure that the contactless antenna of the terminal can work normally and stably, the contactless antenna must meet certain design requirements.

[0073] The field strength distribution information of the non-contact antenna on the terminal's mainboard can be obtained through electromagnetic simulation software. By simulating the electromagnetic field of the entire terminal and simulating the actual working environment of the non-contact antenna on the terminal's mainboard, the key parameters of the non-contact antenna can be obtained, thereby evaluating the performance of the non-contact antenna and the coupling with other components of the terminal. Electromagnetic simulation software such as Ansoft High Frequency Structure Simulator (HFSS) and CST Studio Suite (CST) are usually used. These electromagnetic simulation software can simulate the non-contact antenna on the terminal's mainboard based on advanced algorithms such as the finite element method (FEM) or the finite integral method in the time domain (FDID). After the simulation is completed, the field strength distribution information of the non-contact antenna will be generated, including magnetic field strength, electric field strength, and field distribution.

[0074] S102, determining a field strength area to be optimized in the mainboard according to the field strength distribution information;

[0075] The electromagnetic characteristics of the non-connected antenna are affected by factors such as the routing method and the working environment. Improper design may lead to uneven field strength and fail to meet communication requirements. For example, metal objects near the non-connected antenna may absorb or reflect electromagnetic waves, causing the field strength of the non-connected antenna to weaken in certain directions, or the routing method of the non-connected antenna limits the distribution of the electromagnetic field, causing the electromagnetic field of the non-connected antenna to fail to cover the working area.

[0076] The field strength distribution information obtained after whole-machine simulation with electromagnetic simulation software is used to distinguish the areas that cannot meet the communication requirements and identify them as the field strength areas to be optimized in the motherboard, so as to make targeted adjustments to the non-connected antenna.

[0077] S103, performing an adjustment operation on the non-connected antenna in the field strength area to be optimized, the adjustment operation including adjusting the routing mode of the non-connected antenna from a straight line to a spiral line and adjusting the physical parameters of the non-connected antenna.

[0078] Adjust the non-contact antenna for the determined field strength area to be optimized, including changing the routing method and adjusting the physical parameters. Although straight routing is simple and direct, it is easily interfered and cannot provide the best electromagnetic characteristics in the complex internal environment of the terminal. Adjusting the routing method of the non-contact antenna from straight routing to spiral routing can optimize the electromagnetic characteristics such as electromagnetic field distribution and field strength in the field strength area to be optimized, and improve the efficiency and performance of the non-contact antenna. In addition, the physical parameters of the non-contact antenna will also affect the electromagnetic characteristics, so in addition to changing the routing method, it is also necessary to adjust the physical parameters of the non-contact antenna according to specific needs so that the non-contact antenna meets the required performance.

[0079] In this embodiment, the field strength distribution information of the non-contact antenna on the mainboard of the terminal is obtained, and the field strength area to be optimized of the non-contact antenna is determined from the field strength distribution information, and the straight line alignment of the non-contact antenna in the field strength area to be optimized is adjusted to a spiral alignment according to the alignment mode and physical parameters of the non-contact antenna in the field strength area to be optimized, so that the electromagnetic characteristics such as the electromagnetic field distribution and field strength in the field strength area to be optimized are optimized, and the efficiency and performance of the non-contact antenna are improved. By changing the alignment mode of the non-contact antenna and adjusting the field strength of each location of the non-contact antenna, the non-contact antenna signal can cover the working area, thereby improving the payment efficiency and user payment experience.

[0080] In the above step S103, the non-connected antennas in the field strength area to be optimized are adjusted. Figure 2 , Figure 2 An embodiment of performing an adjustment operation in a method for non-connected antenna layout provided in the present application includes:

[0081] S201, determining an adjustment target for the field intensity area to be optimized;

[0082] By performing electromagnetic field simulation on the non-connected antenna on the terminal's motherboard, the field strength area to be optimized in the motherboard can be found, that is, the area where communication instability may occur. Therefore, it is necessary to determine the adjustment target of the field strength area to be optimized to effectively improve the field strength in the field strength area to be optimized so that the field strength in this area meets the application requirements. For example, the field strength value is obtained from the simulated field strength distribution information, and then compared with the designed field strength value. If the field strength value of the field strength area to be optimized is low and does not meet the design requirements, then the adjustment target is to enhance the field strength, otherwise the adjustment target is to weaken the field strength. Or if it is found from the field strength distribution information that the magnetic field distribution center is offset, the adjustment target is determined to adjust the magnetic field distribution center.

[0083] S202, calculating the physical parameters of the non-contact antenna according to the adjustment target, the physical parameters including the size, number of turns and spacing of the coil;

[0084] In order to improve the field strength in the area to be optimized, it is necessary to adjust the physical parameters of the non-connected antenna, including the size, number of turns and spacing of the coil. These parameters will directly affect the electromagnetic field distribution and radiation characteristics of the non-connected antenna.

[0085] Increasing the size of the coil may help to enhance the field strength, but it may also increase the size and cost of the non-contact antenna. Increasing the number of turns of the coil can increase the inductance of the non-contact antenna, thereby changing its electromagnetic field distribution, but it may also lead to an increase in the resistance of the non-contact antenna and a decrease in efficiency. In addition, the spacing of the coils will also affect the performance of the non-contact antenna. In practical applications, the non-contact antenna is not only affected by its own physical parameters, but also by factors such as its working environment. Therefore, there is a difference between the theoretical calculation of the performance of the non-contact antenna and the actual application. In order to make the performance of the non-contact antenna closer to the ideal state of the design, it is necessary to comprehensively consider various factors, and then determine the best physical parameter combination through the optimization algorithm in the electromagnetic simulation software. Therefore, after completing the adjustment of the physical parameters of the non-contact antenna, it is necessary to re-simulate the electromagnetic field of the whole machine to verify whether the adjustment is effective. If the performance of the adjusted non-contact antenna still does not meet the requirements, continue to adjust until it approaches or meets the design requirements.

[0086] S203: adjusting the routing mode of the non-connected antenna in the field strength area to be optimized from a straight line to a spiral line according to the physical parameters.

[0087] Based on the calculated coil size, number of turns and spacing, the original straight line of the non-connected antenna is adjusted to a spiral line. According to the magnetic flux formula Φ = BS, by adjusting the routing mode to a spiral line, the magnetic flux Φ in the field strength area S to be optimized can be superimposed or reduced, and the field strength B increases or decreases accordingly, thereby optimizing the field strength in the field strength area to be optimized, so that the non-connected antenna can work in a wider frequency range, enhance the signal reception and transmission capabilities, and achieve the adjustment goals of optimizing the magnetic field strength, expanding the coverage range or optimizing the electromagnetic field distribution.

[0088] In this embodiment, the physical parameters of the size, number of turns and spacing of the coil are changed according to the adjustment target, and the routing mode of the non-contact antenna is adjusted from a straight line to a spiral routing. The routing mode of the spiral routing can effectively optimize the field strength generated by the non-contact antenna. At the same time, by adjusting the physical parameters of the non-contact antenna, the spiral routing of the non-contact antenna can meet different adjustment targets such as optimizing the field strength and adjusting the center of the magnetic field distribution. In addition, the adjusted non-contact antenna is simulated and verified again, and the optimization algorithm of the electromagnetic simulation software is used to iterate the optimal physical parameters to ensure that the non-contact antenna meets the performance requirements of the design.

[0089] In some specific embodiments, in addition to adjusting the routing mode of the non-connected antenna from a straight line to a spiral line according to physical parameters, the direction of the spiral line needs to be adjusted. Figure 3 , Figure 3 An embodiment of adjusting the spiral routing direction in the method for non-connected antenna layout provided in the present application includes:

[0090] S301, when the adjustment target is to enhance the field strength, the spiral routing is a same-direction spiral routing;

[0091] When the simulation results show that the field strength in the field strength area to be optimized of the non-connected antenna should be enhanced, then the same-direction spiral routing can be used. When the same-direction spiral routing is used, each turn of the coil is wound in the same direction so that the magnetic flux is superimposed. According to the magnetic flux formula Φ=BS, the magnetic flux Φ in the field strength area S to be optimized is superimposed, and the field strength B is enhanced accordingly. By adjusting the physical parameters of the spiral routing, the performance of the antenna can be further optimized to ensure that the field strength area to be optimized reaches the required field strength level.

[0092] S302: When the adjustment target is to weaken the field strength, the spiral routing is a reverse spiral routing.

[0093] If the field strength in the area to be optimized is too strong, it may interfere with the surrounding electronic terminals or cause unstable communications, for example, signal saturation due to excessive field strength. At this time, the adjustment goal is to weaken the field strength in this area, so it is necessary to use reverse spiral routing, and each turn of the coil is wound in the opposite direction to the main winding direction. The reverse spiral routing is opposite to the original magnetic field direction, and the magnetic fields cancel each other out, reducing the effective magnetic flux. According to the magnetic flux formula Φ=BS, the magnetic flux Φ in the area S to be optimized is reduced, and the field strength B is reduced accordingly.

[0094] See also Figure 4 , Figure 4 A schematic diagram of the structure of an embodiment of a routing method after performing an adjustment operation in the method for non-connected antenna layout provided in the present application. Based on the field strength distribution information of the non-connected antenna, multiple field strength areas to be optimized may be determined, and the adjustment targets of the multiple field strength areas to be optimized are different. If the adjustment target of the field strength area to be optimized is to enhance the field strength, it is necessary to adjust the straight line to a co-directional spiral routing. If the adjustment target of the field strength area to be optimized is to weaken the field strength, it is necessary to adjust the straight line to a reverse spiral routing. At the same time, the co-directional spiral routing and the reverse spiral routing are adjusted according to the physical parameters of the non-connected antenna to achieve the best field strength optimization effect, while the field strength area not to be optimized retains the original straight line routing. After performing the adjustment operation, the non-connected antenna may have three routing methods: co-directional spiral routing, straight line routing, and reverse spiral routing.

[0095] In this embodiment, when the field strength needs to be enhanced, a unidirectional spiral routing is used to enhance the field strength generated by the non-connected antenna. When the field strength is too strong and needs to be weakened, a reverse spiral routing is used to reduce the field strength, reduce interference to surrounding electronic terminals, or cause unstable communications. Depending on the adjustment target, unidirectional spiral routing or reverse spiral routing can be selected to accurately optimize the performance of the non-connected antenna to ensure that the field strength in the field strength area to be optimized can reach the required level. For the field strength area not to be optimized, the original routing method is retained to reduce unnecessary adjustment operations while ensuring the performance of the non-connected antenna, thereby ensuring the effectiveness and necessity of the adjustment operation.

[0096] In the above step S102, it is necessary to determine the field strength area to be optimized in the mainboard according to the field strength distribution information, see Figure 5 , Figure 5 An embodiment of determining a field strength area to be optimized in a method for non-connected antenna layout provided in the present application includes:

[0097] S501, determining field strength thresholds of different areas in the mainboard based on EMV certification requirements;

[0098] EMV certification is a set of internationally accepted payment card security standards that ensure the security and compatibility of payment transactions. In applications involving electromagnetic fields, EMV certification requires measuring the field strength at different locations, such as the center point field strength and the outer circle point field strength. In addition, it is also necessary to measure the field strength at different distances, and EMV certification has different field strength requirements for different locations and distances. According to the EMV certification requirements, a field strength threshold is set for each location and distance in the motherboard. These field strength thresholds ensure the security and reliability of EMV certification.

[0099] S502: Determine, according to the field strength distribution information, an area that does not meet the field strength threshold as a field strength area to be optimized in the mainboard.

[0100] The field strength distribution information of the non-connected antenna is compared with the field strength threshold of EMV certification. If the field strength of a certain area exceeds or is lower than the field strength threshold of EMV certification, then this area cannot effectively support EMV certification. The area that does not meet the field strength threshold of EMV certification is determined as the field strength area to be optimized, so as to facilitate subsequent optimization and adjustment of the area.

[0101] In this embodiment, by following the EMV certification requirements to set field strength thresholds for different areas, the field strength distribution information of the contactless antenna is compared with the set field strength threshold, so as to distinguish the field strength area to be optimized that does not meet the set field strength threshold, which provides a clear direction for subsequent optimization and adjustment, and also ensures that the field strength in the working area of ​​the contactless antenna meets the requirements for EMV certification, thereby improving the overall performance of the contactless antenna.

[0102] In some specific embodiments, in addition to determining the field strength area to be optimized in the mainboard according to the field strength threshold of EMV certification, it is also necessary to determine the field strength area to be optimized in the mainboard according to the field strength uniformity. Figure 6 , Figure 6 Another embodiment of determining a field strength area to be optimized in the method for non-connected antenna layout provided in the present application includes:

[0103] S601, performing a field intensity uniformity check according to the field intensity distribution information;

[0104] Field strength uniformity refers to whether the strength of the electromagnetic field generated by the non-contact antenna at different positions remains consistent or fluctuates within an acceptable range when the terminal is working, which affects the performance of the non-contact antenna.

[0105] Use electromagnetic simulation software to obtain field strength distribution information, and compare the field strength distribution information obtained after simulation with the set field strength uniformity evaluation standard or threshold to determine whether the field strength is uniform. If the field strength difference in a certain area exceeds or falls below the set field strength uniformity evaluation standard or threshold, then the field strength uniformity of this area is considered to fail.

[0106] S602: Determine the area that fails the field strength uniformity check as the field strength area to be optimized in the mainboard.

[0107] After the areas where the field strength uniformity does not pass are determined, these areas are marked as areas of field strength to be optimized, so that these areas can be adjusted or optimized in a targeted manner to meet the requirements of field strength uniformity.

[0108] In this embodiment, by checking the field strength uniformity of the field strength distribution information of the non-contact antenna on the mainboard of the terminal, it is possible to identify areas with uneven field strength distribution, which may have an adverse effect on the performance of the non-contact antenna due to field strength differences exceeding or falling below a safety threshold. These uneven areas are determined as field strength areas to be optimized, providing clear goals and directions for subsequent adjustment and optimization work, so as to ensure that the performance of the non-contact antenna at different locations is consistent, thereby providing users with a more reliable and efficient use experience.

[0109] In the above step S101, the field strength distribution information of the non-connected antenna on the mainboard of the terminal is obtained through simulation. Figure 7 , Figure 7 An embodiment of the whole machine electromagnetic field simulation in the method of non-connected antenna layout provided in the present application includes:

[0110] S701, defining the component material properties of the contactless antenna according to the overall environment of the terminal, and constructing a contactless antenna model;

[0111] Objects near the non-contact antenna may affect the field distribution, so the simulation of the non-contact antenna also needs to consider the objects around the non-contact antenna, such as chips, metal components, housings, ferrite sheets, etc. Before simulation, first determine and set the component material properties of the non-contact antenna in the electromagnetic simulation software, such as the conductor material of the non-contact antenna is aluminum or copper, the substrate material is PCB board, etc. These component materials will directly affect the conductivity, durability and signal transmission efficiency of the non-contact antenna.

[0112] Then, a non-contact antenna geometric model is constructed based on the actual non-contact antenna or the designed non-contact antenna. The model needs to accurately reflect the size, shape and relative position of the non-contact antenna with other components. Usually, the geometric model of the non-contact antenna can be directly constructed using electromagnetic simulation software, such as HFSS, CST, etc., or drawn using 3D modeling software, such as SolidWorks, AutoCAD, etc., and then imported into the electromagnetic simulation software after drawing.

[0113] S702, setting a simulation environment for a non-connected antenna model;

[0114] In the electromagnetic simulation software, it is necessary to configure a simulation scenario that simulates the real working environment, predict and optimize the performance of the non-connected antenna, verify the feasibility of the non-connected antenna design, simulate the impact of the real working environment, and improve the test efficiency and accuracy.

[0115] In some specific embodiments, setting the simulation environment of the non-connected antenna model includes setting the simulation excitation, field monitor, grid, solver, operating frequency, boundary conditions and convergence parameters of the non-connected antenna model, which is specifically described below:

[0116] Taking the simulation of NFC antenna as an example, the simulation excitation is to simulate the signal source of NFC antenna in actual work. A lumped port is added to the feeding point of NFC antenna, the excitation frequency is defined as 13.56MHz and the port impedance is set according to the actual situation. For NFC antenna, the magnetic field distribution is usually more important, and a field monitor needs to be added at 13.56MHz to analyze the power density or the field in a specific direction. Due to the low-frequency characteristics of NFC antenna, the wavelength is long at low frequency, and a fine grid is required to capture the near-field characteristics, so the grid type is set to hexahedral grid to obtain better accuracy, and the adaptive grid is adjusted to increase the grid density in key areas such as coils and gaps. According to the low-frequency characteristics of NFC antenna, the magnetic quasistatic solver is selected, and the NFC antenna model is simulated using the magnetic quasistatic solver. The convergence criterion of the magnetic quasistatic solver and the simulation working frequency of 13.56MHz are set according to the characteristics of NFC antenna. The simulation of NFC antenna focuses on the near-field distribution. The far-field calculation can be used to set the absorption boundary conditions, and the open domain can be used to simulate the infinite space to more realistically reflect the field distribution around the NFC antenna.

[0117] S703: Simulate the non-connected antenna model according to the simulation environment to obtain field strength distribution information of the non-connected antenna on the mainboard of the terminal.

[0118] After configuring the simulation environment and the non-contact antenna model, run the electromagnetic simulation software to calculate the electromagnetic performance of the non-contact antenna. After the simulation is completed, the electromagnetic simulation software will generate a series of non-contact antenna data. For example, when CST software simulates the non-contact antenna, CST can quickly and accurately calculate the magnetic field, electric field and other related parameters of the non-contact antenna. At the same time, you can use CST's visualization tools to analyze the simulation data. For example, you can view the three-dimensional field distribution of the electric field and magnetic field of the non-contact antenna in the three-dimensional view of CST; use the slice view to view the field distribution on a specific plane to more intuitively observe the field strength and direction; use CST's probe function to obtain the value of the field strength at a specified location. If you need to further analyze the field strength distribution information, you can export the data in the electromagnetic simulation software to evaluate the performance of the non-contact antenna.

[0119] In this implementation, the real working environment of the non-contact antenna is simulated by electromagnetic simulation software, and the non-contact antenna model is simulated to obtain field strength distribution information of the non-contact antenna that is more in line with reality, which is conducive to the subsequent effective and targeted optimization and adjustment of the non-contact antenna, ensuring the accuracy and reliability of the non-contact antenna design, and improving the performance of the non-contact antenna in practical applications.

[0120] See also Figure 8 The present application also provides a device for a non-connected antenna layout, including:

[0121] An acquisition unit 801 is used to acquire field strength distribution information of a non-connected antenna on a mainboard of a terminal, where the field strength distribution information is information obtained through simulation;

[0122] A determination unit 802 is used to determine a field strength area to be optimized on the mainboard according to the field strength distribution information;

[0123] The adjustment unit 803 is used to perform an adjustment operation on the non-connected antenna in the field strength area to be optimized, and the adjustment operation includes adjusting the routing mode of the non-connected antenna from a straight line to a spiral routing and adjusting the physical parameters of the non-connected antenna.

[0124] Optionally, the adjusting unit 803 is further configured to:

[0125] Determine the adjustment target of the field strength area to be optimized;

[0126] Calculate the physical parameters of the non-connected antenna according to the adjustment target, the physical parameters including the size, number of turns and spacing of the coil;

[0127] According to the physical parameters, the routing mode of the non-connected antenna in the field strength area to be optimized is adjusted from a straight line to a spiral line.

[0128] Optionally, the adjusting unit 803 is further configured to:

[0129] When the adjustment target is to enhance the field strength, the spiral alignment is a same-direction spiral alignment;

[0130] When the adjustment target is to weaken the field strength, the spiral routing is a reverse spiral routing.

[0131] Optionally, the determining unit 802 is further configured to:

[0132] Determine the field strength thresholds for different areas in the motherboard based on EMV certification requirements;

[0133] According to the field strength distribution information, the area that does not meet the field strength threshold is determined as the field strength area to be optimized in the mainboard.

[0134] Optionally, the determining unit 802 is further configured to:

[0135] Conduct field strength uniformity inspection based on field strength distribution information;

[0136] The area that fails the field strength uniformity check is determined as the field strength area to be optimized in the mainboard.

[0137] Optionally, the acquiring unit 801 is further configured to:

[0138] Define the component material properties of the non-contact antenna according to the terminal's overall environment and build a non-contact antenna model;

[0139] Set up the simulation environment for the non-connected antenna model;

[0140] The non-connected antenna model is simulated according to the simulation environment to obtain the field strength distribution information of the non-connected antenna on the mainboard of the terminal.

[0141] Optionally, the acquiring unit 801 is further configured to:

[0142] Set up the simulation excitation, field monitor, mesh, solver, operating frequency, boundary conditions, and convergence parameters for the non-connected antenna model.

[0143] See also Fig. 9 The present application also provides a device for a non-connected antenna layout, including:

[0144] Processor 901, memory 902, input and output unit 903, bus 904;

[0145] The processor 901 is connected to the memory 902, the input and output unit 903 and the bus 904;

[0146] The memory 902 stores a program, and the processor 901 calls the program to execute any of the above methods.

[0147] The present application also relates to a computer-readable storage medium, on which a program is stored. When the program is run on a computer, the computer executes any of the above methods.

[0148] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0149] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0150] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0151] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0152] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer terminal (which can be a personal computer, a server, or a network terminal, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk, etc., which can store program code.

Claims

1. A method for layout of a non-contact antenna, characterized in that: The method comprises: Acquire field strength distribution information of a non-connected antenna on a mainboard of a terminal, wherein the field strength distribution information is information obtained through simulation; Determining a field strength area to be optimized in the mainboard according to the field strength distribution information; An adjustment operation is performed on the non-contact antenna in the field strength area to be optimized, wherein the adjustment operation includes adjusting the routing mode of the non-contact antenna from a straight line to a spiral line and adjusting physical parameters of the non-contact antenna.

2. The method according to claim 1, characterized in that The performing an adjustment operation on the non-connected antenna in the field strength area to be optimized includes: Determining an adjustment target for the field intensity area to be optimized; Calculating physical parameters of the non-contact antenna according to the adjustment target, the physical parameters including coil size, number of turns and spacing; The routing mode of the non-connected antenna in the field strength area to be optimized is adjusted from a straight line to a spiral line according to the physical parameters.

3. The method according to claim 2, characterized in that When the adjustment target is to enhance the field strength, the spiral alignment is a co-directional spiral alignment; When the adjustment target is to weaken the field strength, the spiral routing is a reverse spiral routing.

4. The method according to claim 1, characterized in that: The determining the field strength area to be optimized in the mainboard according to the field strength distribution information includes: Determine field strength thresholds for different areas in the mainboard based on EMV certification requirements; According to the field strength distribution information, an area that does not meet the field strength threshold is determined as a field strength area to be optimized in the mainboard.

5. The method according to claim 1, characterized in that The determining the field strength area to be optimized in the mainboard according to the field strength distribution information includes: Performing a field intensity uniformity check according to the field intensity distribution information; The area that fails the field strength uniformity check is determined as the field strength area to be optimized in the mainboard.

6. The method according to any one of claims 1 to 5, characterized in that The obtaining of field strength distribution information of the non-connected antenna on the mainboard of the terminal includes: Define the component material properties of the non-contact antenna according to the terminal's overall environment and build a non-contact antenna model; Setting a simulation environment for the non-connected antenna model; The non-contact antenna model is simulated according to the simulation environment to obtain field strength distribution information of the non-contact antenna on the mainboard of the terminal.

7. The method according to claim 6, characterized in that The step of setting the simulation environment of the non-connected antenna model includes: The simulation excitation, field monitor, grid, solver, operating frequency, boundary conditions and convergence parameters of the non-connected antenna model are set.

8. A device for non-contact antenna layout, characterized in that: The device comprises: An acquisition unit, used to acquire field strength distribution information of a non-connected antenna on a mainboard of a terminal, wherein the field strength distribution information is information obtained through simulation; A determination unit, configured to determine a field strength area to be optimized on the mainboard according to the field strength distribution information; The adjustment unit is used to perform an adjustment operation on the non-contact antenna in the field strength area to be optimized, wherein the adjustment operation includes adjusting the routing mode of the non-contact antenna from a straight line to a spiral line and adjusting the physical parameters of the non-contact antenna.

9. A device for non-contact antenna layout, characterized in that: The device comprises: Processor, memory, input-output unit, and bus; The processor is connected to the memory, the input and output unit, and the bus; The memory stores a program, and the processor calls the program to execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a program stored thereon, wherein the program, when executed on a computer, performs the method according to any one of claims 1 to 7.

Images