Method, module, auxiliary antenna and device for optimizing a contactless communication antenna

Abstract

The embodiment of the present specification provides an optimization method, a module, an auxiliary antenna and equipment of a non-contact communication antenna. The scheme comprises an optimization method of a non-contact communication antenna, which can comprise: acquiring first field distribution information of a non-contact communication antenna to be optimized; determining a to-be-optimized area with a signal strength less than a preset threshold according to the first field distribution information; determining a target auxiliary antenna capable of covering the to-be-optimized area according to the to-be-optimized area; and stacking the target auxiliary antenna and the non-contact communication antenna to improve the signal strength of the to-be-optimized area.

Description

TECHNICAL FIELD

[0001] One or more embodiments of the present specification relate to the technical field of non-contact communication, in particular to an optimization method of a non-contact communication antenna. One or more embodiments of the present specification also relate to a non-contact communication module, an auxiliary antenna and a computing device. BACKGROUND

[0002] Non-contact communication technologies such as NFC (Near Field Communication), RFID (Radio-Frequency Identification) have been widely used in identity authentication, mobile payment, access control, logistics tracking, asset management, intelligent manufacturing, smart home and other fields due to their non-contact, convenience and efficiency, which greatly improves the efficiency of information interaction and user experience.

[0003] Based on the working principle of non-contact communication, the magnetic field strength decreases cubically from the center to the periphery, which leads to high alignment requirements in business scenarios using non-contact communication and poor edge working effect.

[0004] Therefore, how to provide a solution to improve the edge working effect. SUMMARY

[0005] Therefore, one or more embodiments of the present specification provide an optimization method of a non-contact communication antenna, a non-contact communication module, an auxiliary antenna, a non-contact communication tag, a non-contact communication device and a computing device.

[0006] According to a first aspect of one or more embodiments of the present specification, an optimization method of a non-contact communication antenna is provided, comprising: obtaining first field distribution information of a non-contact communication antenna to be optimized; determining a to-be-optimized area with a signal strength less than a preset threshold according to the first field distribution information; determining a target auxiliary antenna capable of covering the to-be-optimized area according to the to-be-optimized area; the target auxiliary antenna comprises at least two sub-antennas; the resonant frequency of the target auxiliary antenna is consistent with the working frequency of the non-contact communication antenna; and stacking the target auxiliary antenna and the non-contact communication antenna to improve the signal strength of the to-be-optimized area.

[0007] According to a second aspect of one or more embodiments of the present specification, a non-contact communication module is provided, the communication module comprising a non-contact communication antenna, a communication chip, and an auxiliary antenna; the non-contact communication antenna is connected with the communication chip; the communication chip is configured to obtain energy sensed by the non-contact communication antenna and transmit information; the auxiliary antenna is independent of the non-contact communication antenna and is located on a side of the non-contact communication antenna close to a communication device that performs non-contact communication with the communication module; the auxiliary antenna comprises at least two sub-antennas; the resonance frequency of the auxiliary antenna is consistent with the working frequency of the non-contact communication antenna; under the action of the auxiliary antenna, the signal strength in the magnetic field formed by the non-contact communication antenna is greater than or equal to a preset threshold.

[0008] According to a third aspect of one or more embodiments of the present specification, an auxiliary antenna is provided, the auxiliary antenna comprising at least two sub-antennas; the resonance frequency of the target auxiliary antenna is consistent with the working frequency of the non-contact communication antenna; the non-contact communication antenna is a communication antenna in a non-contact communication device using the auxiliary antenna; the auxiliary antenna is configured to be arranged on a side of the non-contact communication antenna close to a communication device that performs non-contact communication with the non-contact communication antenna; under the action of the auxiliary antenna, the signal strength in the magnetic field formed by the non-contact communication antenna is greater than or equal to a preset threshold.

[0009] According to a fourth aspect of one or more embodiments of the present specification, a non-contact communication tag is provided, the tag comprising the above-mentioned non-contact communication module or the tag comprising the above-mentioned auxiliary antenna for non-contact communication.

[0010] According to a fifth aspect of one or more embodiments of the present specification, a non-contact communication device is provided, the device comprising the above-mentioned non-contact communication module or the device comprising the above-mentioned auxiliary antenna.

[0011] According to a sixth aspect of one or more embodiments of the present specification, a computing device is provided, comprising a memory, a processor, and computer instructions stored on the memory and executable on the processor, wherein the processor executes the computer instructions to implement the steps of the above-mentioned optimization method of the non-contact communication antenna.

[0012] The embodiment of the present specification can at least achieve the following beneficial effects: by selecting a matching auxiliary antenna, such as an auxiliary antenna capable of covering a signal-weak area, for a signal-weak area in field distribution information of a non-contact communication antenna to be optimized, and the resonant frequency of the auxiliary antenna is matched with the operating frequency of the communication antenna, and the auxiliary antenna is laminated to the communication antenna, the signal in the signal-weak area of the communication antenna can be enhanced. For example, the signal strength of the edge area can be improved by the auxiliary antenna, and the edge area can also communicate normally, thereby improving the stability of non-contact communication and reducing the alignment requirement. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present specification, and other drawings can also be obtained by those skilled in the art without creative labor.

[0014] Figure 1 A flowchart of a non-contact communication antenna optimization method provided by an embodiment of the present specification is shown in the figure;

[0015] Figure 2 A field distribution information diagram of a non-contact communication antenna provided by an embodiment of the present specification is shown in the figure;

[0016] Figure 3 A flowchart of a non-contact communication antenna optimization method provided by an embodiment of the present specification is shown in the figure;

[0017] Figure 4 A structure diagram of a sub antenna included in an auxiliary antenna provided by an embodiment of the present specification is shown in the figure;

[0018] Figure 5 A structure diagram of a non-contact communication antenna provided by an embodiment of the present specification is shown in the figure;

[0019] Figure 6 A structure diagram of a non-contact communication antenna provided by an embodiment of the present specification is shown in the figure;

[0020] Figure 7 A structure diagram of a non-contact communication module provided by an embodiment of the present specification is shown in the figure;

[0021] Figure 8 A structure diagram of an auxiliary antenna provided by an embodiment of the present specification is shown in the figure;

[0022] Figure 9A structural block diagram of a computing device provided for an embodiment of the present specification. DETAILED DESCRIPTION

[0023] In order to enable persons skilled in the art to better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification. Obviously, the described embodiments are only a part of the embodiments of the present specification, rather than all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the protection scope of the present specification.

[0024] The present specification uses specific terms to describe the embodiments of the present specification. As "one embodiment", "an embodiment", and / or "some embodiments" means a certain feature, structure or characteristic related to at least one embodiment of the present specification. Therefore, it should be emphasized and noted that the "an embodiment" or "one embodiment" or "one alternative embodiment" mentioned in different positions in the present specification does not necessarily refer to the same embodiment. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0025] The terms used in one or more embodiments of the present specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of the present specification. The singular forms "a", "an" and "the" used in one or more embodiments of the present specification and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of the present specification includes any or all possible combinations of one or more associated listed items.

[0026] The term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, product or device. Without more limitations, it does not exclude the presence of other same or equivalent elements in the process, method, product or device including the elements.

[0027] Although the terms first, second, etc. can be used herein to describe various information, these terms are not intended to denote a particular order or precedence. For example, a first entity discussed above could be termed a second entity, and similarly, a second entity could be termed a first entity without departing from the scope of the present disclosure. The terms first, second, etc. are used to distinguish between two or more entities, and are not necessarily used to denote a sequence or order. For example, a first server and a second server can be two servers, and are distinguished from each other by the use of the terms first and second.

[0028] The term "if" can be interpreted to mean "when" or "upon" or "in response to determining" within the context of one or more embodiments of the present disclosure.

[0029] In the present disclosure, unless specifically stated, "receiving and sending of data" is not necessarily direct receiving and sending, and can be indirect receiving and sending. For example, A receiving data sent by B can be understood as A directly receiving data sent by B, or can be understood as A indirectly receiving data sent by B through C or other subjects. Similarly, B sending data to A can be understood as B directly sending data to A, or can be understood as B indirectly sending data to A through C or other subjects. Here, C can be one subject, or two or more subjects.

[0030] In the present disclosure, unless specifically stated, the association relationship generated between structures can be a direct association relationship or an indirect association relationship. For example, when describing "A is connected with B", unless it is specifically stated that A is directly connected with B, it should be understood that A can be directly connected with B or indirectly connected with B; for another example, when describing "A is on B", unless it is specifically stated that A is directly above B (AB is adjacent and A is above B), it should be understood that A can be directly above B or A can be indirectly above B (there are other elements between AB and A is above B). By analogy.

[0031] The user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in one or more embodiments of the present disclosure are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards in relevant regions, and provide corresponding operation portal for user to choose authorization or refusal.

[0032] The following explains the terms involved in one or more embodiments of the present disclosure.

[0033] NFC (Near Field Communication): A short-range wireless communication technology with a working distance usually within 10 cm, such as for mobile payment, access control cards, and public transportation cards. In the process of NFC near field communication, the device that actively transmits signals can be called the master device or the transmitting device, such as an NFC card reader device, a device in card reader mode, etc.; the device that passively responds to the signal transmitted by the master device can be called the slave device or the target device, such as an NFC tag, a device in card emulation mode, a device with an NFC tag, etc.

[0034] RFID (Radio-Frequency Identification): An automatic identification technology that uses wireless radio frequency to perform non-contact bidirectional data communication and read and write to recording media (electronic tags or RFID cards) to achieve the purpose of identifying targets and exchanging data. For example, supermarket anti-theft tags and logistics package tracking tags can be identified without contact.

[0035] Passive system: A device without an internal power supply that must rely on an external device (such as a card reader) to provide energy to work.

[0036] Coupling coefficient: A parameter that measures the degree of magnetic field coupling between two coils, with a value between 0 and 1. The closer to 1, the better the magnetic field "coordination" between the two coils, and the higher the energy transfer efficiency.

[0037] Resonant frequency: The natural vibration frequency of a circuit composed of a coil and a capacitor. When the external signal frequency equals the resonant frequency, the circuit will produce the strongest response.

[0038] Forward propagation coefficient S21: A parameter in the radio frequency field that measures the transmission efficiency of signals from the transmitting end to the receiving end, with a unit of decibels (dB). The larger the S21 value (the closer to 0), the less signal attenuation and the higher the transmission efficiency.

[0039] The energy transfer efficiency of traditional passive NFC or RFID systems is highly dependent on spatial alignment accuracy. For 13.56MHz high-frequency systems, the near-field magnetic field strength decreases cubically with distance, resulting in an effective detection area projection radius of less than 10cm in the xy-plane (assuming the plane where the NFC or RFID tag is located). While 860-960MHz ultra-high-frequency systems have a longer radiation distance, the antenna directivity causes a sharp drop in field strength at the outer edge of the main beam, often resulting in an effective coverage diameter of less than 1.2m at a distance of 1m from the antenna. More seriously, signal attenuation at the edge of the detection plane can reach over 8dB, causing the tag reading success rate to plummet to below 35% in the central area, creating a substantial spatial blind zone. To address the shortcomings of these technologies, one embodiment of this specification provides an optimization method for a contactless communication antenna. By employing an auxiliary antenna that enhances the signal, the signal strength in the edge area can be increased, improving communication stability.

[0040] The technical solutions provided in the various embodiments of this specification are described in detail below with reference to the accompanying drawings.

[0041] Figure 1 This is a flowchart illustrating an optimization method for a non-contact communication antenna according to one embodiment of this specification. From a programming perspective, the entity executing the process can be a program mounted on an application server, application terminal, or platform. It is understood that this method can be executed by any device, equipment, platform, or cluster of devices with computing and processing capabilities.

[0042] like Figure 1 As shown, the method may include:

[0043] Step 102: Obtain the first field distribution information of the contactless communication antenna to be optimized.

[0044] In this context, "contactless communication antenna" can refer to the antenna used for contactless communication in a contactless communication device, such as the NFC antenna in an NFC tag, the RFID antenna in an RFID device, and so on. The field distribution information of the contactless communication antenna can represent the field distribution information of the contactless communication device equipped with that antenna.

[0045] The contactless communication device with this contactless communication antenna can be a passive device, such as an NFC tag or an RFID tag. Alternatively, the contactless communication device can also be an active device, such as an electronic device used as an NFC tag, an electronic device in card emulation mode, or a card reader device.

[0046] Non-contact communication antennas can be used to receive or transmit radio frequency signals. They can be in the form of metal coils or in the form of metal sheets arranged in a coil.

[0047] The field distribution information of the non-contact communication antenna can be obtained by actually measuring the field distribution near the antenna, or can be obtained by simulating the antenna to obtain simulated field distribution information. Alternatively, the field distribution information can be determined by combining measurement and simulation, for example, the signal strength information of a plurality of points can be actually measured, the field distribution information of the communication antenna can be simulated by a simulation system, the simulated signal strength information corresponding to each point in the simulated field distribution information can be determined, the mapping coefficient between the actually measured signal strength and the simulated signal strength of each point can be determined, the simulated field distribution information can be adjusted according to the mapping coefficient to obtain the actual field distribution information, so that the actual field distribution information can be obtained without actually measuring too many points.

[0048] The first field distribution information can represent the field distribution information of the non-contact communication antenna when the target auxiliary antenna is not used, and can represent the magnetic field intensity of different regions. The field distribution information can include signal strength information of each region or position point, and can also include position information of each region or position point. In actual application, the field distribution information can also be represented by a forward propagation coefficient S21. The larger the value of S21 is, the closer to 0 it is, indicating that the signal attenuation is less, the transmission efficiency is higher, and the signal strength on the surface of the non-contact communication antenna is also higher.

[0049] The field distribution of the non-contact communication antenna is generally that the signal strength is strong in the central region and gradually weakens as it spreads to the periphery. This can seriously limit the effective recognition range, and the magnetic field intensity decreases cubically from the center to the periphery, resulting in high alignment requirements and poor edge performance.

[0050] Step 104: determining a to-be-optimized region with a signal strength less than a preset threshold according to the first field distribution information.

[0051] The preset threshold can represent the required signal strength of the non-contact communication. The preset threshold can represent a specific value or a value range, and the specific value of the preset threshold can be determined according to the communication protocol used by the non-contact communication antenna, or can be determined according to the success rate of business handling by the non-contact communication antenna, or can be determined according to expert experience. The preset threshold corresponding to the non-contact antenna in different application scenarios or different scenarios can be different. The specific value is not limited here.

[0052] The region to be optimized can include a region in the non-contact communication antenna where the signal strength is less than a preset threshold, for example, a position close to the edge of the non-contact communication antenna. Alternatively, the region to be optimized can also be the entire region where the non-contact communication antenna is located.

[0053] If the value of the forward propagation coefficient S21 is used to represent the signal strength, the region where the signal strength is less than the preset threshold can be a region where S21 is less than the preset threshold. For example, S21 generally takes a negative number, such as between -30 and -1, and the preset threshold can be -10. The region where the signal strength is less than the preset threshold can be a region where S21 is less than -10, such as a region where S21 takes a value between -30 and -10.

[0054] Step 106: determining a target auxiliary antenna capable of covering the region to be optimized according to the region to be optimized.

[0055] The target auxiliary antenna can include at least two sub-antennas, and the resonant frequency of each sub-antenna can be consistent with the operating frequency of the non-contact communication antenna.

[0056] Each sub-antenna or at least part of the sub-antennas included in the target auxiliary antenna can be a mutually independent sub-antenna, and there can be no connection relationship between each sub-antenna or at least part of the sub-antennas, which are mutually independent, for example, each sub-antenna or at least part of the sub-antennas do not need to be connected in parallel or in series through a wire or a cable.

[0057] The above-mentioned determination of the target auxiliary antenna capable of covering the region to be optimized can mean the determination of the antenna parameters of the target auxiliary antenna capable of covering the region to be optimized, such as shape, size, coil layer number, coil turn number, coil density, etc., or can also include electrical energy-related parameters such as capacitance value and inductance value. Alternatively, the above-mentioned determination of the target auxiliary antenna capable of covering the region to be optimized can mean the selection of a matching auxiliary antenna from the alternative auxiliary antennas.

[0058] Step 108: stacking the target auxiliary antenna and the non-contact communication antenna to improve the signal strength of the region to be optimized.

[0059] In the embodiments of the present specification, the target auxiliary antenna can include at least two sub-antennas, and the resonant frequency of each sub-antenna can be consistent with the operating frequency of the non-contact communication antenna. Stacking the target auxiliary antenna and the non-contact communication antenna can cause each sub-antenna and the non-contact communication antenna to generate magnetic resonance coupling, each sub-antenna can redistribute the magnetic field energy formed by the non-contact communication antenna, and thus the signal strength of the region with weak signal can be improved.

[0060] The target auxiliary antenna can cover the area to be optimized, or can also cover the area where the non-contact communication antenna is located. The area covered by the target auxiliary antenna at least includes the area to be optimized. The resonant frequency of the target auxiliary antenna can be equal to the operating frequency of the non-contact communication antenna, or can be located near the operating frequency of the non-contact communication antenna. For example, the difference between the resonant frequency of the target auxiliary antenna and the operating frequency of the non-contact communication antenna can be less than or equal to a preset difference. For example, in the NFC near field communication scenario, if the operating frequency of the non-contact communication antenna is 13.56 MHz, the resonant frequency of the target auxiliary antenna can be 13.56 MHz, or close to 13.56 MHz, for example, can be a frequency within the range of 13.56±0.7 MHz.

[0061] In practical applications, the target auxiliary antenna and the non-contact communication antenna can include spiral-wound metal wires. There can be a certain gap between the wound wires. The area where the target auxiliary antenna is located can represent the area surrounded by the outer contour or each edge of the target auxiliary antenna. The area where the non-contact communication antenna is located can represent the area surrounded by the outer contour or each edge of the non-contact communication antenna. It is not only the area containing metal wires, but also the gap area between the wires.

[0062] The target auxiliary antenna can be laminated to the outer side of the non-contact communication antenna. The outer side can be the side of the non-contact communication antenna close to other devices that perform non-contact communication with the non-contact communication antenna. The target auxiliary antenna can be in contact with the non-contact communication antenna, or there can be a small gap between the target auxiliary antenna and the non-contact communication antenna.

[0063] At least part of the projection of the target auxiliary antenna can be located in the area where the non-contact communication antenna is located. The projection can represent the orthographic projection. The projection of the auxiliary antenna can represent the projection of the area where the auxiliary antenna is located, or can represent the projection of the area contained by the outer contour of the auxiliary antenna. The auxiliary antenna can include a spiral coil structure. There can be a certain gap between each coil. The projection of the auxiliary antenna can include the part of the gap between each coil. For example, when performing non-contact communication, the upper part of the communication antenna in the communication module is the communication area. The device performing interaction can communicate with the communication module by approaching the upper part of the communication antenna. In this case, the auxiliary antenna can be pasted or placed above the communication antenna. The auxiliary antenna can cover the entire communication antenna, or can cover part of the communication antenna.

[0064] Figure 2 A schematic diagram of the field distribution information of a non-contact communication antenna provided in an embodiment of the present specification is shown. Here, the field distribution information is taken as an example to be described by using the forward propagation coefficient S21. As shown in FIG. 1, the field distribution information of the non-contact communication antenna is shown in the form of a graph. The horizontal axis represents the frequency, and the vertical axis represents the value of the forward propagation coefficient S21. The curve in the graph represents the field distribution information of the non-contact communication antenna. Figure 2As shown, the left side is a schematic diagram of the field distribution after adding the target auxiliary antenna to the NFC tag antenna. The right side is a schematic diagram of the field distribution of the NFC tag antenna without adding the target auxiliary antenna. Different colors represent different values of S21, that is, different signal strengths. The closer the value of S21 is to 0, the higher the degree of red color, indicating the higher the signal strength. The figure is defined by the coordinate system of the area where the non-contact and communication antennas are located. The horizontal and vertical axes can represent the position information. By Figure 2 It can be seen that by adding the target auxiliary antenna, the signal strength of the edge region can be effectively enhanced, so that the field strength of the area where the NFC tag antenna is located meets the communication requirements, and non-contact communication can be performed even in the edge region.

[0065] In practical applications, a plurality of different specifications of backup auxiliary sub-antennas can be pre-set, and then a combination of auxiliary sub-antennas capable of covering the to-be-optimized region is selected from each backup auxiliary sub-antenna based on the size of the to-be-optimized region, as the target auxiliary antenna. Alternatively, a combination of auxiliary sub-antennas capable of covering the non-contact communication antenna can be selected according to the size of the non-contact communication antenna, and the auxiliary antenna can also cover the to-be-optimized region. Among them, the backup auxiliary sub-antennas can include auxiliary antennas of different sizes, and according to the size of the to-be-optimized region or the size of the non-contact communication antenna, an antenna combination composed of a smaller number of auxiliary sub-antennas can be determined in priority according to a pre-set matching algorithm, which can be stacked as an auxiliary antenna to the non-contact communication antenna, and then the distribution of the magnetic field under the action of the two is detected to determine whether there is still a region with signal strength less than a pre-set threshold. If not, the auxiliary antenna can be used as the target auxiliary antenna. If there is still a region with signal strength less than a pre-set threshold, a plurality of auxiliary sub-antennas can be selected to form an auxiliary antenna, and then the field distribution detection and judgment process is performed again until there is no signal with signal strength less than a pre-set threshold in the area where the non-contact communication antenna is located. The auxiliary antenna that can achieve this effect is determined as the target auxiliary antenna of the non-contact communication antenna. The resonant frequency of each backup auxiliary sub-antenna can be consistent with the resonant frequency of the non-contact communication antenna, or it can be partially consistent or partially inconsistent, so as to be applicable to different non-contact communication scenarios.

[0066] As another implementation, one or more auxiliary sub-antennas of different specifications can be pre-configured, which can include metal coils with less turns or less turns, and the structure is relatively simple. The parameters of the auxiliary sub-antenna can be adjusted according to actual needs, such as increasing the length of the wound metal wire, adjusting the turn spacing, etc., and the target auxiliary antenna that can match the non-contact communication antenna is obtained by adjusting the parameters. Optionally, in an embodiment of the present specification, the above-mentioned determining the target auxiliary antenna capable of covering the to-be-optimized area according to the to-be-optimized area can specifically include:

[0067] determining an initial auxiliary antenna capable of covering the to-be-optimized area according to the size information of the to-be-optimized area; the initial auxiliary antenna includes at least two auxiliary sub-antennas, any auxiliary sub-antenna includes at least two layers of spiral wound metal coils, and each layer includes at least one turn of metal coil;

[0068] obtaining second field distribution information after the initial auxiliary antenna is stacked on the basis of the non-contact communication antenna;

[0069] determining whether there is a region with signal strength less than a preset threshold in the second field distribution information;

[0070] If not, the initial auxiliary antenna is determined as the target auxiliary antenna.

[0071] The initial auxiliary antenna can include two or more auxiliary sub-antennas, and the specifications of each auxiliary sub-antenna can be the same or different. For example, the shape, size, coil quantity, turn number, and line spacing of each auxiliary sub-antenna can be the same or different. Each auxiliary sub-antenna can be independent of each other and have no connection relationship. For example, each auxiliary sub-antenna does not need to be connected in series or parallel through a wire.

[0072] The second field distribution information can be the magnetic field distribution of the area where the non-contact communication antenna is located after the initial auxiliary antenna is added to the non-contact communication antenna, for example, the magnetic field distribution in the projection area of the non-contact communication antenna. The area range corresponding to the second field distribution information and the above-mentioned first field distribution information can be the same.

[0073] If the initial auxiliary antenna cannot make the signal strength of the area where the non-contact communication antenna is located greater than or equal to the preset threshold, the parameters of the auxiliary antenna can be adjusted to obtain a target auxiliary antenna that can meet the needs. Optionally, the method in an embodiment of the present specification can further include:

[0074] If there is a region in the second field distribution information in which the signal strength is less than a preset threshold, then the antenna parameters of the initial auxiliary antenna are adjusted to obtain an adjusted auxiliary antenna; the antenna parameters include at least one of the number of turns of the coil, the distance between the coils, the density of the coils, and the position of the inner layer coil, to obtain the adjusted auxiliary antenna.

[0075] After the adjusted auxiliary antenna is stacked to the non-contact communication antenna, third field distribution information of the non-contact communication antenna is collected.

[0076] If there is no region in the third field distribution information in which the signal strength is less than a preset threshold, then the adjusted auxiliary antenna is determined as the target auxiliary antenna.

[0077] If the signal strength of a certain region is weak, the number of turns of the coil in the region can be increased, such as continuing to wind the metal wire of a preset length in the inner or outer coil; or the density of the coil in the region can be increased, such as shortening the distance between the adjacent two layers of metal coils; or the inner layer coil can be adjusted to be closer to the position of the region in which the signal is weak, and the like. One of the parameters can be adjusted, or multiple parameters can be adjusted until the requirements are met.

[0078] The degree of influence of adjusting the coil parameters of the outer layer of the auxiliary antenna on the field distribution is greater than the degree of influence of adjusting the coil parameters of the inner layer of the auxiliary antenna on the field distribution. If the difference between the signal strength in the region in which the signal is less than the preset threshold and the preset threshold is small, such as less than a preset difference, the parameters of the inner layer coil of the auxiliary antenna can be adjusted; if the difference between the signal strength in the region in which the signal is less than the preset threshold and the preset threshold is large, such as greater than or equal to the preset difference, the parameters of the outer layer coil of the auxiliary antenna can be adjusted.

[0079] The third field distribution information can be the magnetic field distribution of the region in which the non-contact communication antenna is located after the adjusted auxiliary antenna is added to the non-contact communication antenna, such as the magnetic field distribution in the projection region of the non-contact communication antenna. The range of the region corresponding to the third field distribution information can be the same as the range of the region corresponding to the second field distribution information and the first field distribution information.

[0080] If there is still a region in the third field distribution information in which the signal strength is less than the threshold, the adjustment can be continued according to the similar logic as described above until the signal strength in each region of the non-contact communication antenna is greater than the preset threshold.

[0081] In order to improve the adjustment rate and accuracy, the parameters of the auxiliary antenna can also be adjusted to adjust the capacitance value of the auxiliary antenna, and the target auxiliary antenna is determined by adjusting the capacitance value. Optionally, the initial auxiliary antenna in an embodiment of the present specification can also include a capacitor, and the capacitor is connected in series with the metal coil; the antenna parameters also include the capacitance value of the capacitor.

[0082] The first end and the last end of the helically wound metal coil of the initial auxiliary antenna can be connected to two ends of a capacitor respectively, and the capacitor in series can constitute an independent circuit, which can not contain a power element. Among them, the capacitor can be a variable capacitor or a fixed capacitor. For the variable capacitor, if it is necessary to adjust the capacitance value of the initial auxiliary antenna, the capacitance value of the variable capacitor can be adjusted; for the fixed capacitor, if it is necessary to adjust the capacitance value of the initial auxiliary antenna, the fixed capacitor can be replaced with a capacitor of other capacitance value.

[0083] If the resonant frequency of the initial auxiliary antenna is consistent with the working frequency of the non-contact communication antenna, if the length of the metal wire of the initial auxiliary antenna is increased, the inductance value is increased, in order to ensure that the resonant frequency of the adjusted auxiliary antenna is still consistent with the working frequency of the non-contact communication antenna, the capacitance value can be reduced. Among them, increasing the length of the metal wire is conducive to improving the signal strength, and through the cooperation of the capacitor, the resonant frequency can also be ensured to meet the requirements. In an embodiment of the present application, the initial auxiliary antenna can include at least two sub-antennas. The above adjustment of the antenna parameters of the initial auxiliary antenna can include: adjusting the antenna parameters of at least one of the sub-antennas.

[0084] Among them, the parameter adjustment of the initial auxiliary antenna can be adjustment of one of the sub-antennas, or adjustment of multiple sub-antennas.

[0085] The sub-antenna to be adjusted can also be determined according to the position of the area with signal strength less than the preset threshold in the field distribution information, for example, the signal strength of the lower right corner area in the field distribution information is less than the preset threshold, and the sub-antenna in the lower right corner of the initial auxiliary antenna can be adjusted.

[0086] After adjusting the parameters of the auxiliary antenna each time, the field distribution information can be measured or simulated again, and then whether to continue adjusting can be determined according to the latest field distribution information. If the initial auxiliary antenna is adjusted for a preset number of times, for example, 5 times, 8 times, 10 times, etc., or the number of turns of the auxiliary antenna after adjustment has reached the turn threshold, for example, 10 turns, 20 turns, etc., but there is still an area with signal strength less than the preset threshold in the field distribution information using the adjusted auxiliary antenna, the initial auxiliary antenna can be replaced, and the above related steps can be executed again.

[0087] As an implementation, different sizes of auxiliary sub-antennas can be provided, and a smaller number of sub-antennas can be selected to form the auxiliary antenna. For example, assuming that the non-contact communication antenna is an approximately square antenna with a uniform coil distribution, two rectangular auxiliary sub-antennas of the same size can be selected as the initial auxiliary antenna in the first time. The length of the longer side of the auxiliary sub-antenna can be consistent with or slightly greater than the length of the side of the non-contact communication antenna, and the length of the shorter side of the auxiliary sub-antenna can be half or slightly greater than the length of the side of the non-contact communication antenna. If the signal strength of the region of the non-contact communication antenna is still greater than or equal to the preset threshold value after 5 adjustments, the initial auxiliary antenna can be replaced by three rectangular sub-antennas. The length of the longer side of the sub-antenna can be consistent with or slightly greater than the length of the side of the non-contact communication antenna, and the length of the shorter side of the sub-antenna can be one third or slightly greater than the length of the side of the non-contact communication antenna. If the initial auxiliary antenna of the three sub-antennas still cannot meet the requirements after subsequent adjustment, the initial auxiliary antenna of four sub-antennas can be further replaced. For example, the four sub-antennas can be four square sub-antennas of the same or similar size, and the length of the side can be half or slightly greater than the length of the side of the non-contact communication antenna. Similarly, the target auxiliary antenna applicable to the non-contact communication antenna can be determined.

[0088] Figure 3 A flowchart of an optimization method of a non-contact communication antenna provided by an embodiment of the present specification is shown in the following figure. The optimization of the entire magnetic field distribution of the non-contact communication antenna is taken as an example for illustration. As shown in the figure, Figure 3 the method can include the following steps.

[0089] Step 302: Obtain the first field distribution information of the non-contact communication antenna to be optimized.

[0090] The first field distribution information can be the field distribution information of the magnetic field generated by the non-contact communication antenna under the action of electromagnetic induction. The surface of the non-contact communication antenna can be measured or the first field distribution information of the non-contact communication antenna can be determined by simulation and other methods. The first field distribution information can be the field distribution information generated by the non-contact communication antenna without adding auxiliary antennas.

[0091] For example, the non-contact communication antenna is an antenna in an NFC tag, under the action of a card reader device, the NFC tag antenna can generate electromagnetic induction with the card reader device, the first field distribution information can be the magnetic field distribution information on the surface of the NFC tag under the action of the card reader device, for example, the NFC tag feeds back information to the card reader device using the energy transmitted by the card reader device through electromagnetic induction, the first field distribution information can be the distribution information of the magnetic field generated in the process of the NFC tag feeding back information through the NFC tag antenna.

[0092] For another example, the non-contact communication antenna can be a communication antenna in an electronic device on the side of the NFC tag, which can be used to transmit an excitation signal to promote the card reader device to arouse NFC, the first field distribution information can be the field distribution information of the magnetic field generated in the process of the non-contact communication antenna transmitting the excitation signal.

[0093] Step 304: determining whether there is a region with signal strength less than a preset threshold in the first field distribution information.

[0094] The preset threshold can be set according to actual needs, which can represent the signal strength that can normally perform non-contact communication.

[0095] If there is no region with signal strength less than the preset threshold in the first field distribution information, it can be indicated that the current non-contact communication antenna can meet the actual needs and does not need to be optimized, and step 306 of ending the process can be performed.

[0096] If the execution subject in the embodiment of the present specification, such as a platform, device or equipment for optimization, has a display screen, if there is no region with signal strength less than the preset threshold, a prompt information indicating that the current non-contact communication antenna can meet the actual needs and does not need to be optimized can also be displayed. Alternatively, if the execution subject can communicate with the host computer such as a staff's mobile phone, computer, etc., the prompt information can also be displayed through the host computer such as a mobile phone, computer, etc.

[0097] If there is a region with signal strength less than the preset threshold in the first field distribution information, it can be indicated that the current non-contact communication antenna needs to be optimized, and step 308 of determining an auxiliary antenna capable of covering the non-contact communication antenna can be performed.

[0098] The auxiliary antenna can represent the initial auxiliary antenna or the adjusted auxiliary antenna or the target auxiliary antenna introduced above. The auxiliary antenna can include two or more sub-antennas, and can cover the area where the non-contact communication antenna is located. The projection of the non-contact communication antenna can be located within the projection range of the auxiliary antenna.

[0099] Afterwards, the auxiliary antenna can be stacked with the contactless communication antenna in actual operation or simulation, for example, if the upper side of the contactless communication antenna is the side for contactless communication with other devices, the auxiliary antenna is stacked on the upper side of the contactless communication antenna, between the contactless communication antenna and the communication path of the other devices, and then the field distribution of the contactless communication antenna with the auxiliary antenna is measured or simulated. The field strength of the upper surface of the auxiliary antenna can be measured or simulated to obtain new field distribution information. After step 308, step 310 can be performed to obtain the second field distribution information of the contactless communication antenna with the auxiliary antenna.

[0100] To ensure the matching of the auxiliary antenna and the contactless communication antenna, further judgment can be performed to determine whether there is a region with signal strength less than a preset threshold in the second field distribution information in step 312.

[0101] If there is no region with signal strength less than a preset threshold in the second field distribution information, it can be indicated that the current auxiliary antenna is matched with the contactless communication antenna, and the signal strength of each region of the contactless communication antenna meets the communication requirement. Step 314 can be performed to determine the auxiliary antenna as the auxiliary antenna matched with the contactless communication antenna.

[0102] The parameters of the auxiliary antenna can also be recorded, or the correspondence between the auxiliary antenna and the contactless communication antenna can be recorded, so that the auxiliary antenna can be used for the same specification of contactless communication antenna in the future.

[0103] If there is a region with signal strength less than a preset threshold in the second field distribution information, it can be indicated that the current auxiliary antenna is not matched with the contactless communication antenna. Step 316 can be performed to adjust the parameters of the auxiliary antenna or replace the auxiliary communication antenna.

[0104] As described above, the parameters of the auxiliary antenna such as the number of turns, the capacitance value, and the line spacing can be adjusted, or other specifications of auxiliary antennas can be replaced. Afterwards, the adjusted auxiliary antenna or the new auxiliary antenna can be added to the upper side of the contactless communication antenna to collect new field distribution information under the action of the auxiliary antenna, as described in step 310. The cycle is repeated until the auxiliary antenna matched with the contactless communication antenna is determined.

[0105] In practical applications, the initial auxiliary antenna can be simulated using a simulation system, as well as the antenna parameters can be adjusted. The adjusted antenna can also be simulated to determine the target auxiliary antenna. Alternatively, the actual initial auxiliary antenna can be adjusted according to preset adjustment rules using an operating system or platform to obtain the actual adjusted auxiliary antenna. Furthermore, the second and / or third field distribution information can be determined through the methods described above, including actual measurement, simulation, and a combination of measurement and simulation.

[0106] While one or more embodiments of this specification provide method steps as described in the embodiments or flowcharts, it is understood that the order of steps listed in the embodiments or flowcharts is merely one possible execution order among many steps and does not represent the only execution order. The order of some steps can be adjusted according to actual needs, or some steps can be omitted. When the claims involve method steps, adjustments to the order of such steps, or parallel execution between steps, are also within the scope of protection of the claims. For example, if the contactless communication antenna is a traditional antenna for contactless communication such as NFC or RFID, and the field distribution follows the conventional attenuation pattern from the center to the surrounding areas, steps 302 to 304 can be omitted, and the auxiliary antenna can be directly determined based on the size information of the contactless communication antenna. Or as described above. Figure 1 Steps 102 and 104 shown can also be omitted, and the region to be optimized can be determined according to the rules of conventional field distribution.

[0107] Figure 4 This is a schematic diagram of the structure of a sub-antenna included in an auxiliary antenna according to one embodiment of this specification. Figure 4 As shown, the sub-antenna may include a metal coil 402 and a capacitor element 404. The capacitor element 404 is connected in series within the metal coil 402. The metal coil 402 can be obtained by spirally winding one or more metal wires connected together according to a preset rule. The metal coil 402 has two connection ends: one end can be connected to one end (e.g., the positive terminal) of the capacitor element 404, and the other end can be connected to the other end (e.g., the negative terminal) of the capacitor element 404, thus forming a closed-loop structure with the metal coil and the capacitor element. The capacitor element 404 can be a fixed capacitor element or an adjustable capacitor element.

[0108] like Figure 4 As shown, the sub-antenna has two coil layers. From the inside out, the first layer has two turns and the second layer has three turns. The distance between each layer can represent the coil spacing. The distance between each turn in a coil layer can represent the line spacing. The width of a coil layer can represent the coil width, which can be related to factors such as the number of coil turns, line spacing, and line radius.

[0109] Figure 5 A structural diagram of a non-contact communication antenna with an auxiliary antenna is provided for an embodiment of the present specification. In order to distinguish, the non-contact communication antenna is shown by a solid line and the auxiliary antenna is shown by a dashed line. The non-contact communication antenna can represent an existing non-contact communication antenna, which can have a metal wire wound in a spiral, and can also have elements such as capacitors, resistors, communication chips, etc. connected to the metal wire (as shown in the element diagram of the middle triangle). Figure 5 The auxiliary antenna includes two sub-antennas, such as the sub-antennas shown in the above Figure 4 Since the non-contact communication antenna is a symmetrical square antenna structure, the magnetic field formed is approximately a symmetrical magnetic field, and the two sub-antennas shown in 5 can be sub-antennas of the same specification.

[0110] Optionally, the outer contour of the target auxiliary antenna in the embodiment of the present specification can be greater than or equal to the outer contour of the non-contact communication antenna. As shown in Figure 5 The outer edge of the auxiliary antenna composed of two sub-antennas can be slightly larger than the outer contour of the non-contact communication antenna, and the auxiliary antenna can cover the entire area where the non-contact communication antenna is located.

[0111] In practical applications, if the area with a signal strength less than a preset threshold in the field distribution information of the non-contact communication antenna is the area close to the edge of the non-contact communication antenna, an auxiliary antenna matching the area can be set, for example, for the non-contact communication antenna shown in the above Figure 5 If only the signal strength of the edge area of the non-contact antenna needs to be adjusted, an auxiliary antenna can be set at the edge, for example, 8 square sub-antennas can be used, which are arranged in a manner similar to 3 rows and 3 columns, and no antenna is arranged at the position of the second row and the second column, forming an auxiliary antenna in the shape of a hollow back character in the middle, which can also achieve optimal adjustment of the non-contact communication antenna. In this way, the auxiliary antenna can also not cover the entire area where the non-contact communication antenna is located.

[0112] In practical applications, the non-contact communication antenna is usually a planar antenna, in order to better couple with the communication antenna, each sub-antenna in the auxiliary antenna can also be located on the same plane. Optionally, the target auxiliary antenna includes a plurality of sub-antennas located on the same plane. If the non-contact communication antenna is a ring-shaped or a certain degree of curved communication antenna, the target auxiliary antenna can also match the shape of the non-contact communication antenna, and the auxiliary antenna can be ring-shaped or a certain degree of curved.

[0113] The field distribution of the sub-antennas in the auxiliary antenna also follows the conventional field distribution rule, and the signal strength in the middle region is usually greater than that at the edge. In order to enable the non-contact communication antenna to provide a magnetic field with a more uniform signal distribution, optionally, in an embodiment of the present specification, the two edges of two adjacent sub-antennas in the target auxiliary antenna are in close contact with each other or at least partially overlap. In this way, the magnetic fields generated by the adjacent sub-antennas are superimposed in the adjacent regions, so that the field strength in the adjacent regions is enhanced, and the field distribution in the region where the non-contact communication antenna is located can be more uniform.

[0114] In order to enable the field distribution in the region where the non-contact communication antenna is located to be more uniform, the coil density of the outer layer of the auxiliary antenna can be set to be higher, so that an equal-strength magnetic field can be generated in the edge region. Optionally, for any sub-antenna in the target auxiliary antenna, the coil density of the sub-antenna close to the central region of the sub-antenna is less than the coil density away from the central region.

[0115] An embodiment of the present specification also provides an auxiliary antenna capable of expanding the detection range of a non-contact communication antenna. Optionally, the outer contour of the target auxiliary antenna can exceed the outer contour of the communication antenna in a preset direction, and the preset direction is the direction in which the detection range of the non-contact communication antenna needs to be expanded.

[0116] Suppose that it is necessary to expand the detection range of the non-contact communication antenna to the left side or the right side, so that the interaction device that needs to interact with the non-contact communication antenna can successfully interact with the non-contact communication antenna even if the non-contact communication antenna is deviated to the left side or the right side, thereby reducing the alignment requirement.

[0117] Figure 6 An embodiment of the present specification provides a structural schematic diagram of an auxiliary antenna for a non-contact communication antenna. In order to facilitate distinction, the non-contact communication antenna is shown by a solid line, and the auxiliary antenna is shown by a dashed line. The outer contour of the auxiliary antenna is greater than that of the non-contact communication antenna, and the original magnetic field range of the non-contact communication antenna can be expanded.

[0118] As shown in Figure 6 , the auxiliary antenna can include four sub-antennas, and the projections of the sub-antennas on the left and right sides exceed the projection region of the non-contact communication antenna. In this way, the edges of the sub-antennas can be in close contact or overlap with each other.

[0119] In actual applications, other numbers of sub-antennas can also be used, as long as the outer edge of the auxiliary antenna formed thereby can exceed the outer edge of the non-contact communication antenna. Here, the number and shape of the sub-antennas are not limited.

[0120] In one embodiment of the present specification, the stability of non-contact communication can be improved by introducing a coupling coil, i.e., a target auxiliary antenna, on the surface of a non-contact communication antenna such as an NFC, RFID, etc. On the other hand, the alignment requirement can be reduced, and the detection plane of the coil can be flexibly expanded.

[0121] Based on the same idea, the present specification also provides a non-contact communication module including an auxiliary antenna. Figure 7 A structural schematic diagram of a non-contact communication module provided by one embodiment of the present specification is shown in FIG. 7. As shown in the figure, the communication module can include a non-contact communication antenna 702, a communication chip 704, and an auxiliary antenna 706. The non-contact communication antenna 702 is connected to the communication chip 704. The communication chip 704 is used to acquire the energy sensed by the non-contact communication antenna and to return information. Figure 7

[0122] The communication chip 704 can be an NFC communication chip, an RFID communication chip, etc. that can process the radio frequency signals sensed by the non-contact communication antenna 702. For example, the communication chip can have a communication function and a certain computing ability, or can further include an encryption logic circuit and an encryption or decryption module to enhance the security of data transmission. The communication chip can have a power supply circuit, or a power conversion circuit, a communication interface circuit, an oscillation circuit, etc. to realize non-contact communication.

[0123] The non-contact communication antenna 702 can be an antenna for receiving or transmitting radio frequency signals, which can be in the form of a metal coil or in the form of a metal sheet wound into a coil structure.

[0124] In practical applications, the non-contact communication antenna and the communication chip can be the main part of a non-contact communication device, and the non-contact communication antenna and the communication chip can cooperate with each other to complete non-contact communication. For example, an NFC tag, an NFC card, an NFC tag device, an NFC card reader device, etc. have a non-contact communication antenna and a communication chip.

[0125] ​The auxiliary antenna 706 can be used as an auxiliary communication unit, which can be independent of the above-mentioned non-contact communication antenna 702, and can not be connected with the communication chip 704. The auxiliary antenna 706 can exist independently. If the non-contact communication module has the auxiliary antenna, the signal strength in the area where the non-contact communication antenna 702 of the non-contact communication module is located can be more uniform, and the signal strength at the edge position can also meet the communication requirements, the detection range can be expanded, and the alignment requirements can be reduced. If the non-contact communication module does not have the auxiliary antenna, the communication can also be completed, but the signal strength at the edge position of the area where the non-contact communication antenna 702 is located is weaker, and the interactive device can not be able to perceive the signal at the edge position, and needs to be aligned with the center area to complete the communication. The auxiliary antenna 706 can be a passive antenna, and can be magnetically coupled with the non-contact communication antenna to redistribute the energy of the non-contact communication antenna, so that the field distribution in the area where the non-contact communication antenna is located is as uniform as possible.

[0126] The auxiliary antenna 706 can be located on the side of the non-contact communication antenna 702 close to the communication device that performs non-contact communication with the communication module. For example, when performing non-contact communication, the upper side of the communication antenna in the communication module is a communication area, and the device performing interaction can communicate with the communication module close to the upper side of the communication antenna. In this case, the auxiliary communication antenna can be pasted or placed above the communication antenna. The auxiliary communication antenna can cover the entire communication antenna, or can cover part of the area of the communication antenna. At least part of the projection of the auxiliary antenna can be located in the area where the communication antenna is located. The projection can represent the orthographic projection, and the projection of the auxiliary antenna can represent the projection of the area where the auxiliary antenna is located, or can represent the projection of the area contained by the outer contour of the auxiliary antenna. The auxiliary antenna can include a spiral coil structure, and there can be a certain spacing between the coils. The projection of the auxiliary antenna can include the part with the spacing between the coils.

[0127] The auxiliary antenna includes at least two sub-antennas. The resonance frequency of the auxiliary antenna is consistent with the working frequency of the non-contact communication antenna. Under the action of the auxiliary antenna, the signal strength in the magnetic field formed by the non-contact communication antenna is greater than or equal to a preset threshold. Alternatively, under the action of the auxiliary antenna, the difference in signal strength in different areas of the magnetic field formed by the non-contact communication antenna can be less than a preset difference, so that the field distribution in the area where the non-contact communication antenna is located tends to be uniform.

[0128] The auxiliary antenna can be determined according to the method in the above-mentioned embodiments. Alternatively, the auxiliary antenna can also be determined in other ways, such as being determined based on expert experience or based on model calculation.

[0129] As an implementation, each sub antenna or at least one sub antenna in the auxiliary antenna can be a simple metal coil or a ring-shaped metal sheet. For example, it can be a spiral metal coil, and the two ends of the metal coil can be connected to each other to form a closed loop coil.

[0130] In practical applications, the number of turns of the coil has a positive correlation with the inductance and a negative correlation with the resonant frequency; the more turns of the coil antenna, the greater the inductance of the coil antenna, and the smaller the resonant frequency. The coil spacing has a positive correlation with the resonant frequency; the greater the coil spacing of the coil antenna, the greater the resonant frequency. The coil width has a negative correlation with the inductance and a positive correlation with the resonant frequency; the greater the coil width, the smaller the inductance of the coil antenna, and the greater the resonant frequency. By adjusting the number of turns of the coil, the coil width, the line spacing, the coil length, etc., an auxiliary antenna that matches the communication antenna can be obtained. If the auxiliary antenna contains a capacitive element, the capacitance value has a negative correlation with the resonant frequency, and an auxiliary antenna that matches the communication antenna can also be obtained by adjusting or selecting a suitable capacitance value.

[0131] As another implementation, at least one of the sub antennas can include a metal coil and a capacitive element connected in series with the metal coil; the capacitive element includes an adjustable capacitive element or a fixed capacitive element.

[0132] As described above Figure 4 The metal coil in the sub antenna can be connected in series with the capacitive element.

[0133] The auxiliary antenna can include two sub antennas or multiple rows and columns of sub antennas. Optionally, the above-mentioned communication antenna can include an antenna array composed of m x n sub antennas; m and n are positive integers. Each of the sub antennas is independent of each other, and adjacent edges of two adjacent sub antennas are in contact with each other.

[0134] In which, the number of turns of the coil, the line spacing, the line width, the size, etc. of each sub antenna can be the same, for example, after determining the specifications of one sub antenna, multiple sub antennas of the same specifications are selected to construct the auxiliary antenna. Or the specifications of each sub antenna can be different, or at least partially different, for example, the specifications of a row or a column near the edge are different from the specifications of the sub antenna near the center area. Here, the rules of each sub antenna are not limited, as long as the requirements can be met.

[0135] The adjacent edges of the two adjacent sub antennas can be attached together or overlapped together, or crossed together, and the two adjacent sub antennas can have an overlapping part.

[0136] In one embodiment of the present specification, the size of the sub-antenna can also be determined according to the number of sub-antennas contained in the communication antenna and the auxiliary antenna. Optionally, if the lateral side length of the outer contour of the non-contact communication antenna is a, and the longitudinal side length is b, the lateral side length of the outer contour of any sub-antenna in the antenna matrix is a / n+k1, and the lateral side length of the outer contour is b / m+k2; wherein k1 and k2 are constants.

[0137] wherein k1 and k2 are numbers greater than 0, and k1 is less than a / n, and k2 is less than b / m. k1 and k2 can represent the length of overlap required between two adjacent sub-antennas, for example, can take a value greater than or equal to the radius of the metal wire, or a value greater than the width of the outermost coil, etc. The specific value can be set according to actual needs, as long as the outer contour of the auxiliary antenna is greater than the outer contour of the non-contact communication antenna.

[0138] In practical applications, the communication antenna is usually a planar antenna. Optionally, each sub-antenna can be located in the same plane, or can also be located in different planes.

[0139] In order to facilitate matching with communication antennas of different specifications, at least one of the sub-antennas can be detachably fixed to the bottom plate, so that a suitable number of sub-antennas can be selected to assemble an auxiliary communication antenna that matches the communication antenna according to the size of the communication antenna, such as the size. The bottom plate of the auxiliary communication antenna can be made of a thin material to reduce the impact on the signal, or the communication antenna can be used as the floor of the auxiliary communication antenna, and the auxiliary communication antenna is directly fixed above the communication antenna.

[0140] In order to make the auxiliary antenna more effective on the communication antenna, as one embodiment, the outer contour of the auxiliary antenna can match the outer contour of the communication antenna.

[0141] For example, the overall shape of the auxiliary antenna can generally coincide with the overall shape of the communication antenna, and the outer contour of the auxiliary antenna can coincide with the outer contour of the communication antenna; or the auxiliary antenna can be slightly larger or smaller than the communication antenna, and the outer contour of the auxiliary antenna is on the outside or inside of the outer contour of the communication antenna.

[0142] As one embodiment, the coverage of the auxiliary antenna for the non-contact communication antenna can be greater than or equal to a preset threshold. For example, the auxiliary antenna can completely cover the non-contact communication antenna, or can also cover part of the area of the non-contact communication antenna.

[0143] If it is necessary to optimize part of the area of the communication antenna, the outer contour of the auxiliary antenna can also not match the outer contour of the communication antenna, and the auxiliary antenna can coincide with the projection of part of the area of the non-contact communication antenna.

[0144] As an implementation, the auxiliary antenna can include a metal with an electrical conductivity greater than or equal to 100 Siemens per meter. For example, a metal wire or a metal sheet with an electrical conductivity greater than or equal to 100 Siemens per meter can be processed according to a certain rule to obtain the communication antenna.

[0145] In actual applications, the metal wire can be wound in a planar spiral shape to obtain the metal coil of the auxiliary antenna. The metal coil of the auxiliary antenna includes the planar spiral metal wire. Specifically, the sub antenna can include the planar spiral metal wire.

[0146] For another example, the metal coil can also be wound in a spiral upward manner to obtain the metal coil of the sub antenna. The metal coil of the auxiliary antenna can be a coil with a certain height, and the coils of each turn can be located in the same plane or can not be located in the same plane.

[0147] In actual applications, the auxiliary antenna can be an internal component of the communication module, and the auxiliary communication antenna and the communication antenna can be located inside the communication module. For example, if the non-contact communication module is a communication module in an NFC tag, the communication antenna, the communication chip, and the auxiliary antenna can be encapsulated inside the NFC tag, and the auxiliary antenna can be located above the communication antenna and closer to the side of the NFC tag that is touched. For another example, for an electronic device with a non-contact communication module, the electronic device can have the communication antenna, the communication chip, and the auxiliary antenna inside, and the auxiliary antenna can be located above the communication antenna and closer to the side of the electronic device that is touched.

[0148] Alternatively, the auxiliary antenna can be an independent component that can be pasted or fixed in other ways on the outer surface of the communication module. For example, if the non-contact communication module is a communication module in an NFC tag, the communication antenna and the communication chip can be inside the NFC tag, and the auxiliary antenna can be fixed on the outer surface of the NFC tag. For another example, for an electronic device with a non-contact communication module, the electronic device can have the communication antenna and the communication chip inside, and the auxiliary antenna can be fixed on the outer surface of the electronic device in the communication area of the electronic device.

[0149] For some existing or already in use non-contact communication tags, devices, electronic devices, etc. with communication antennas and communication chips, if the auxiliary antenna provided in an embodiment of the present specification can be an independent component, the auxiliary antenna can be used to improve the existing or already in use tags, devices, electronic devices, etc. to improve the communication effect of these tools. In this way, the original tags, devices, electronic devices, etc. do not need to be modified, and the matching auxiliary antenna can be pasted or fixed on the outer surface of the original tags, devices, electronic devices, etc. in other ways, which is more practical.

[0150] As an implementation, in order to facilitate the combination into an auxiliary antenna applicable to various communication antennas, the outer contour of the sub antenna can be in a polygonal shape, such as a square, a rectangle, a triangle, a trapezoid, etc. In this way, the auxiliary antenna mainly composed of the sub antennas can cover the area of the communication antenna, or cover a specified area, facilitating flexible configuration.

[0151] In actual application, the shape of the sub antenna can also be selected according to the shape of the communication antenna, for example, the communication antenna is a square, and the sub antenna can also be a square, or the sub antenna can be a rectangle, a triangle, etc. capable of being combined into a square.

[0152] In order to make the field distribution in the area where the contactless communication antenna is located more uniform, optionally, the coil density of the central area of at least one sub antenna in the auxiliary antenna can be smaller than the coil density away from the central area.

[0153] As shown in the above 4, the coil density of the inner layer can be smaller than the coil density of the outer layer, which can make the magnetic field traditionally attenuated from the center to the periphery tend to be uniform.

[0154] In actual application, the coil density can also be set according to the actual field distribution, for example, if the original field distribution of the contactless communication antenna is relatively biased to the right, the right side area of the contactless communication antenna is relatively strong, and the left side area is relatively weak, and thus the coil density of the sub antenna on the left side of the auxiliary antenna can be greater than the coil density of the sub antenna on the right side.

[0155] As an implementation, if the auxiliary antenna includes at least two layers of spiral wound metal coils, the length ratio of the outer layer metal coil to the inner layer metal coil can be 7:4, and the width ratio can be 5:4.

[0156] As shown in the above Figure 5 If the auxiliary antenna includes a plurality of long direction sub antennas, the length ratio of the outer layer metal coil to the inner layer metal coil of one of the sub antennas can be 7:4, and the width ratio can be 5:4.

[0157] The length can represent the length of the longer side, and the width can represent the length of the shorter side. In practice, the length or the width can be the length of the outermost turn of the coil in the layer, or the length or the width can be the length of the innermost turn of the coil in the layer, or the length or the width can be the length of any turn of the coil in the layer, or the length or the width can be the average of the lengths of the turns of the coil in the layer, etc. The specific measurement criteria are not limited here. The auxiliary antenna in one embodiment of the present specification can also be used to expand the exploration range of the contactless communication antenna and can also reduce the alignment requirements. Optionally, the outer contour of the auxiliary antenna exceeds the outer contour of the communication antenna in a preset direction, and the preset direction is the direction in which the communication antenna needs to expand the detection range.

[0158] As shown in the above Figure 6 , the auxiliary antenna can protrude from the left and right sides of the contactless communication antenna. In practical applications, the auxiliary antenna can protrude from other areas of the contactless communication antenna, such as the upper side, the lower side, etc. The auxiliary antenna can protrude from one direction or can protrude from multiple directions.

[0159] In practical applications, the communication module can be a passive device for contactless communication, such as an NFC tag, an RFID tag, a device in card emulation mode, etc. Alternatively, the communication module can also be an active device for contactless communication, such as a card reader device, which is not limited here.

[0160] Although one or more embodiments of the present specification provide a module structure as shown in the embodiments or the schematic diagram, it can be understood that the structure listed in the embodiments or the schematic diagram is only one of the many structures, and does not represent the only structure composition. Part of the structure position or element can be adjusted according to the actual needs, or part of the element can be omitted.

[0161] The various technical features in the above embodiments can be combined in any manner, as long as there is no conflict or contradiction between the features. However, due to the limited space, they are not described one by one, and therefore any combination of the various technical features in the above embodiments also belongs to the scope disclosed by the present specification.

[0162] Based on the same idea, the present specification also provides an auxiliary antenna. Figure 8 A structural schematic diagram of an auxiliary antenna provided by one embodiment of the present specification is shown in FIG. 8. As shown in the Figure 8 , the auxiliary antenna 800 can include at least two sub-antennas 802.

[0163] The resonant frequency of the target antenna is consistent with the operating frequency of the non-contact communication antenna; the non-contact communication antenna is a communication antenna in a non-contact communication device using the auxiliary antenna; the auxiliary antenna can be arranged on the side of the non-contact communication antenna close to a communication device for non-contact communication with the non-contact communication antenna; and under the action of the auxiliary antenna, the signal strength in the magnetic field formed by the non-contact communication antenna is greater than or equal to a preset threshold.

[0164] The auxiliary antenna can be the auxiliary antenna described in the above embodiments, and the related descriptions of the sub-antenna and the non-contact communication antenna can also refer to the descriptions in the above embodiments, which will not be repeated here.

[0165] Optionally, the auxiliary antenna can further include a capacitive element, which can be connected in series with the metal coil.

[0166] For ease of use, the auxiliary antenna can be encapsulated, for example, a plastic or other material film or shell is used to encapsulate the auxiliary antenna to obtain an independently usable assembly containing the auxiliary antenna.

[0167] For subsequent use, at least one of the outer surfaces of the assembly can have an area that can be pasted or an area that can be fixed by buckling, etc., so as to fix the assembly to the outer surface of the non-contact communication device.

[0168] Some specific structures or control methods can be described in the above embodiments, which will not be repeated here.

[0169] It can be understood that each of the above modules can be a hardware module, or can also refer to a computer program or program segment for executing one or more specific functions. In addition, the division of each of the above modules does not mean that the actual program code must also be separated.

[0170] For the convenience of description, the above modules are described as various modules or units in terms of functions. Of course, when implementing one or more of the present specification, the functions of each module or unit can be implemented in the same or more software and / or hardware, or modules implementing the same function can be combined or implemented by a combination of sub-modules or sub-units. The above described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0171] Based on the same idea, the present specification also provides a non-contact communication tag, which can include the above non-contact communication module or the tag can include the above auxiliary antenna.

[0172] Based on the same idea, the embodiments of the present specification also provide a non-contact communication device, which can include the non-contact communication module described above, or the device can include the auxiliary antenna described above.

[0173] In practical applications, the non-contact communication device can further include a memory, a processor and the like.

[0174] Based on the same idea, the embodiments of the present specification also provide a device corresponding to the method described above.

[0175] Figure 9 A structural block diagram of a computing device 900 according to an embodiment of the present specification is shown.

[0176] The computing device 900 includes:

[0177] a memory 910 and a processor 920;

[0178] The memory 910 is used to store computer programs / instructions, and the processor 920 is used to execute the computer programs / instructions, which realize the steps of the optimization method of the non-contact communication antenna described above when executed by the processor 920.

[0179] Specifically, the components of the computing device 900 include but are not limited to the memory 910 and the processor 920. The processor 920 is connected with the memory 910 through a bus 930, and a database 950 is used to save data.

[0180] The computing device 900 also includes an access device 940 that enables the computing device 900 to communicate via one or more networks 960. Examples of such networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or combinations of such networks, such as the Internet. The access device 940 can include one or more of any type of network interface (for example, a network interface card (NIC)) such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a Worldwide Interoperability for Microwave Access (Wi-MAX) interface, an Ethernet interface, a Universal Serial Bus (USB) interface, a cellular network interface, a Bluetooth interface, a Near Field Communication (NFC) interface, or the like.

[0181] In one embodiment of the present specification, the above-mentioned components of the computing device 900 and other components not shown in the Figure 9 may be connected to each other, for example, through a bus. It should be understood that Figure 9 The computing device structure diagram shown is only for the purpose of example, and is not a limitation on the scope of the present application. Those skilled in the art can add or replace other components as needed.

[0182] The computing device 900 can be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (for example, a tablet computer, a personal digital assistant, a laptop computer, a notebook computer, a netbook, and the like), a mobile phone (for example, a smartphone), a wearable computing device (for example, a smart watch, smart glasses, and the like), or other types of mobile devices, or a stationary computing device such as a desktop computer or a personal computer (PC). The computing device 900 can also be a mobile or stationary server.

[0183] The processor 920 executes the computer instructions to implement the steps of the above-mentioned optimization method of the non-contact communication antenna.

[0184] An embodiment of the present specification further provides a computer readable storage medium, which stores computer instructions, and the computer instructions are executed by a processor to implement the steps of the optimization method of the non-contact communication antenna.

[0185] An embodiment of the present specification further provides a computer program product, which comprises computer programs or instructions, and the computer programs or instructions are executed by a processor to implement the steps of the optimization method of the non-contact communication antenna.

[0186] Each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0187] The above describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the acts or steps recited in the claims can be performed in a different order than the order in which they are recited and still achieve desirable results. In addition, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve the desired results. In certain implementations, multitasking and parallel processing can be advantageous or necessary.

[0188] In the 1990s, it was possible to distinguish whether an improvement in a technology was a hardware improvement (e.g., an improvement in the circuit structure of a diode, transistor, switch, etc.) or a software improvement (an improvement in a method flow). However, as technology has advanced, many improvements in method flows today can be considered as direct improvements in hardware circuit structures. Designers almost always obtain a corresponding hardware circuit structure by programming an improved method flow into a hardware circuit. Therefore, it cannot be said that an improvement in a method flow cannot be implemented using a hardware entity module. For example, a programmable logic device (PLD) (e.g., a field programmable gate array (FPGA)) is an integrated circuit whose logic function is determined by user programming of the device. A designer programs a digital system "integrated" on a PLD by himself / herself, without having to ask a chip manufacturer to design and manufacture a special integrated circuit chip. Furthermore, instead of manually manufacturing an integrated circuit chip, this programming is now mostly implemented using "logic compiler" software, which is similar to a software compiler used when developing a program, and the original code before compilation is also written in a specific programming language, which is called a hardware description language (HDL), and there are many types of HDL, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, RHDL (Ruby Hardware Description Language), etc., and the most commonly used are VHDL (Very-High-Speed Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art should also be aware that it is only necessary to logically program a method flow using the above-mentioned hardware description languages and program it into an integrated circuit to easily obtain a hardware circuit that implements the logical method flow.

[0189] The controller can be implemented in any suitable way, for example, the controller can take the form of a microprocessor or processor and a computer readable medium storing computer readable program code, such as software or firmware, executable by the (micro)processor, logic gates, switches, an application specific integrated circuit (ASIC), a programmable logic controller and an embedded microcontroller, examples of which include but are not limited to the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20 and Silicone Labs C8051F320, the memory controller can also be implemented as part of the control logic of the memory. Those skilled in the art will also know that, in addition to implementing the controller in pure computer readable program code, it is also possible to implement the controller in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers and embedded microcontrollers, etc. to perform the same functions by logically programming the method steps. Such a controller can therefore be considered as a hardware component, and the means included therein for performing various functions can also be considered as structures within the hardware component. Alternatively, the means for performing various functions can even be considered as both a software module implementing the method and a structure within the hardware component.

[0190] The systems, apparatuses, modules or units illustrated by the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer can be a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0191] For the sake of description, the above apparatuses are described in various units by functions respectively. Of course, the functions of each unit can be implemented in the same or multiple software and / or hardware in the implementation of the present application.

[0192] Those skilled in the art will understand that one or more embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

[0193] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof.

[0194] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof.

[0195] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof.

[0196] In one typical configuration, the computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory. The memory can include non-persistent memory, random access memory (RAM), and / or non-volatile memory, among others, in the form of computer-readable media. The memory is an example of computer-readable media.

[0197] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0198] The present application can be described in the general context of computer- executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform particular tasks or implement particular abstract data types. The present application can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communication network. In a distributed computing environment, program modules can be located in both local and remote computer storage media including memory storage devices.

[0199] The above only describes the embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A method for optimizing a non-contact communication antenna, comprising: obtaining first field distribution information of a non-contact communication antenna to be optimized; determining a to-be-optimized region with signal strength less than a preset threshold according to the first field distribution information; determining a target auxiliary antenna capable of covering the to-be-optimized region according to the to-be-optimized region; the target auxiliary antenna comprising at least two sub-antennas; the target auxiliary antenna having a resonant frequency consistent with an operating frequency of the non-contact communication antenna; stacking the target auxiliary antenna and the non-contact communication antenna to improve signal strength of the to-be-optimized region. 2.The method of claim 1, wherein the determining a target auxiliary antenna capable of covering the to-be-optimized region according to the to-be-optimized region comprises: determining an initial auxiliary antenna capable of covering the to-be-optimized region according to size information of the to-be-optimized region; the initial auxiliary antenna comprising at least two auxiliary sub-antennas, any of the auxiliary sub-antennas comprising at least two turns of helically wound metal coils, and each turn comprising at least one turn of metal coils; obtaining second field distribution information of the non-contact communication antenna after stacking the initial auxiliary antenna to the non-contact communication antenna; determining whether there is a region with signal strength less than a preset threshold in the second field distribution information; if not, determining the initial auxiliary antenna as the target auxiliary antenna. 3.The method of claim 2, further comprising: if yes, adjusting antenna parameters of the initial auxiliary antenna to obtain an adjusted auxiliary antenna; the antenna parameters comprising at least one of the number of turns, the distance between turns, the density of turns, and the position of inner turns; collecting third field distribution information of the non-contact communication antenna after stacking the adjusted auxiliary antenna to the non-contact communication antenna; if there is no region with signal strength less than a preset threshold in the third field distribution information, determining the adjusted auxiliary antenna as the target auxiliary antenna. 4.The method of claim 3, wherein the initial auxiliary antenna further comprises a capacitor connected in series with the metal coils; and the antenna parameters further comprise a capacitance value of the capacitor.

5. The method of claim 3, the adjusting the antenna parameters of the initial secondary antenna comprising: adjusting the antenna parameters of at least one of the sub-antennas. 6.The method of any one of claims 1-5, wherein an outer contour of the target auxiliary antenna is greater than or equal to an outer contour of the non-contact communication antenna. Alternatively, the target auxiliary antenna comprises a plurality of sub-antennas located in the same plane. Alternatively, two adjacent edges of two sub-antennas of the target auxiliary antenna are attached to each other or at least partially overlap. Alternatively, for any of the sub-antennas of the target auxiliary antenna, the coil density near a central region of the any of the sub-antennas is less than the coil density away from the central region. 7.The method of any one of claims 1-5, wherein an outer contour of the target auxiliary antenna exceeds an outer contour of the communication antenna in a preset direction, and the preset direction is a direction in which the non-contact communication antenna needs to expand the detection range. 8.A non-contact communication module, comprising a non-contact communication antenna, a communication chip and an auxiliary antenna; the non-contact communication antenna is connected with the communication chip; the communication chip is used for obtaining energy sensed by the non-contact communication antenna and transmitting information back; the auxiliary antenna is located on the side of the non-contact communication antenna close to a communication device for non-contact communication with the communication module; the auxiliary antenna comprises at least two sub-antennas; the resonant frequency of the auxiliary antenna is consistent with the working frequency of the non-contact communication antenna; the resonant frequency of the two sub-antennas is consistent with the working frequency of the non-contact communication antenna; under the action of the auxiliary antenna, the signal strength of the magnetic field formed by the non-contact communication antenna is greater than or equal to a preset threshold, so as to improve the signal strength of the to-be-optimized area in the field distribution of the non-contact communication antenna, which has a signal strength less than the preset threshold. 9.The communication module of claim 8, wherein at least one of the sub-antennas comprises a metal coil and a capacitive element, the capacitive element is connected in series with the metal coil; the capacitive element comprises an adjustable capacitive element or a fixed capacitive element. 10.The communication module of claim 8, wherein the communication antenna comprises an antenna array comprising m×n sub-antennas; m and n are positive integers; each of the sub-antennas is independent of each other, and two adjacent edges of two adjacent sub-antennas are in contact with each other. 11.The communication module of claim 10, wherein if the lateral length of the outer contour of the non-contact communication antenna is a, and the longitudinal length of the outer contour of the non-contact communication antenna is b, the lateral length of the outer contour of any sub-antenna in the antenna array is a / n+k1, and the longitudinal length of the outer contour of the sub-antenna is b / m+k2; wherein k1 and k2 are constants. 12.The communication module of any one of claims 8 to 11, wherein the outer contour of the auxiliary antenna is consistent with the outer contour of the communication antenna; alternatively, the coverage rate of the auxiliary antenna with respect to the non-contact communication antenna is greater than or equal to a preset threshold; alternatively, the auxiliary antenna comprises a metal with a conductivity greater than or equal to 100 Siemens per meter; alternatively, the metal coil of the auxiliary antenna comprises a planar spiral metal wire; alternatively, at least one of the sub-antennas is detachably fixed to a bottom plate; alternatively, at least part of the sub-antennas are located in the same plane; alternatively, the coil density of the central region of at least one of the sub-antennas of the auxiliary antenna is less than the coil density away from the central region. 13.The communication module of any one of claims 8 to 11, wherein the communication antenna is located inside the communication module; or the auxiliary antenna is fixed to the outer surface of the communication module.

14. The communication module of any one of claims 8 to 11, the auxiliary antenna comprising at least two layers of helically wound metal wire, wherein, The length ratio of the outer metal coil to the inner metal coil is 7:4, and the width ratio is 5:

4. 15.The communication module of any one of claims 8 to 11, wherein the outer contour of the auxiliary antenna exceeds the outer contour of the communication antenna in a preset direction, and the preset direction is a direction in which the communication antenna needs to expand the detection range.

16. An auxiliary antenna, comprising at least two sub-antennas. The auxiliary antenna has a resonant frequency consistent with the operating frequency of a contactless communication antenna; the contactless communication antenna is a communication antenna in a contactless communication device using the auxiliary antenna; the two sub-antennas have resonant frequencies consistent with the operating frequency of the contactless communication antenna. The auxiliary antenna is configured to be arranged on a side of the contactless communication antenna close to a communication device in contactless communication with the contactless communication antenna. Under the action of the auxiliary antenna, the signal strength in the magnetic field formed by the contactless communication antenna is greater than or equal to a preset threshold, so as to improve the signal strength of an area to be optimized in the field distribution of the contactless communication antenna, in which the signal strength is less than the preset threshold.

17. A contactless communication tag, comprising the contactless communication module of any one of claims 8 to 15 or the auxiliary antenna of claim 16.

18. A contactless communication device, comprising the contactless communication module of any one of claims 8 to 15 or the auxiliary antenna of claim 16.

19. A computing device, comprising: a memory and a processor; the memory is configured to store a computer program or instructions, and the processor is configured to execute the computer program or instructions, which, when executed by the processor, implement the steps of the method of any one of claims 1 to 7.

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