CN117375685A - A multi-band wireless communication method and system based on spatial multiplexing hyperlens - Google Patents

Abstract

The invention discloses a multiband wireless communication method based on a spatial multiplexing superlens, which relates to the technical field, and comprises the steps of determining the frequency band range of multiband wireless communication and establishing corresponding center frequency according to different frequency bands; taking a sub-wavelength double-splitting ring electromagnetic structure as a super-surface basic unit; determining distribution arrangement of electromagnetic structures in the supercell according to the number of frequency bands; dividing the super surface into square grids by a period p, selecting basic units with proper geometric parameters, and performing spatial arrangement by a phase distribution formula; and processing and preparing a designed super-surface structure by utilizing a printed circuit board process, packaging a sample and the electric force sensor, and testing the emission efficiency of wireless communication signals of the electric force sensor. The invention provides a high-gain multi-band wireless communication scheme to solve the problems that the current power sensor wireless communication signal has lower gain and single-frequency signals are easy to drop.

Description

A multi-band wireless communication method and system based on spatial multiplexing hyperlens

Technical field

The present invention relates to the field of wireless communication technology, in particular to a multi-band wireless communication method and system based on a spatial multiplexing hyperlens.

Background technique

High-voltage transmission lines serve as the backbone of the energy Internet, and their safety and stability ensure social and economic operations. In recent years, the intelligence level of power systems has been continuously improved, and advanced sensing technology has been applied more widely. With the development of micro-nano sensing and MEMS technology, new power sensors are small in size, low in cost, fast in response and high in accuracy, and have become an indispensable means of intelligence such as status sensing of power grid equipment. More and more micro smart sensors are Deployed in high voltage transmission lines.

As a new digital base, intelligent sensing's large-scale deployment and application are inseparable from high-speed, intelligent, safe and controllable wireless communication technology. In the intelligent monitoring of high-voltage transmission lines, wireless communication technology faces the problem of unreliability because communication signals are susceptible to interference in high-voltage and strong magnetic environments. The gain of wireless communication signals of power sensors needs to be further improved. Single-frequency wireless communication in remote areas During the distance transmission process, it is easy to face the problems of disconnection and packet loss, which makes it difficult to meet the requirements of intelligent power grid. It is urgent to propose a reliable, stable and anti-interference wireless communication technology to meet the wireless data transmission in high-voltage environment.

Contents of the invention

In view of existing problems in existing multi-source power grid information fusion and systems based on the Internet of Things, the present invention is proposed.

Therefore, the purpose of the present invention is to provide a high-gain, multi-band wireless communication solution to solve the current problems of low gain of power sensor wireless communication signals and easy disconnection of single-frequency signals.

In order to solve the above technical problems, the present invention provides the following technical solutions:

In a first aspect, embodiments of the present invention provide a multi-band wireless communication method based on spatial multiplexing hyperlenses, which includes determining the frequency band range of multi-band wireless communication and establishing corresponding center frequencies according to different frequency bands; The wavelength double-split ring electromagnetic structure is used as the basic unit of the metasurface; according to the number of frequency bands, the distribution and arrangement of the electromagnetic structure in the supercell is determined; the metasurface is divided into square grids with period p, and basic units with appropriate geometric parameters are selected. , perform spatial arrangement through the phase distribution formula; use the printed circuit board process to prepare the designed metasurface structure, package the sample with the power sensor, and test the emission efficiency of the power sensor wireless communication signal.

As a preferred solution of the multi-band wireless communication method based on spatial multiplexing hyperlens of the present invention, the determination of the frequency band range of multi-band wireless communication is based on the application requirements of the system, regulatory restrictions on available frequency bands and frequency bands. The transmission characteristics determine the frequency band range that the wireless communication system will use; when high-speed data transmission is required over a large range, a lower frequency band is selected; when stable data transmission is required at a medium distance, a frequency band with a medium frequency is selected; when When transmitting high-speed data over short distances, a frequency band with a higher frequency needs to be selected; establishing the corresponding center frequency according to different frequency bands is to use the intermediate frequency within the frequency band range as the center frequency after determining the frequency band range.

As a preferred solution of the multi-band wireless communication method based on spatial multiplexing hyperlens of the present invention, the sub-wavelength double splitting ring electromagnetic structure includes a dielectric layer and a metal layer, and the double splitting ring electromagnetic structure The inner and outer radius range is between 1mm and 14mm, and the opening angle is between 2° and 200°. The inner and outer radii of the double splitting ring electromagnetic structure are divided into small sizes, medium sizes and large sizes, and the opening angles are divided into are small openings, medium openings and large openings; when selecting a higher frequency band, use a subwavelength double splitting ring electromagnetic structure with a small inner and outer radius and a small opening angle as the metasurface basic unit; when selecting a higher frequency band For medium frequency bands, use a subwavelength double-split ring electromagnetic structure with medium inner and outer radii and medium opening angles as the metasurface basic unit; when selecting a lower frequency band, use large inner and outer radii with large opening angles. The subwavelength double-splitting ring electromagnetic structure with a large opening serves as the basic unit of the metasurface.

As a preferred solution of the multi-band wireless communication method based on spatial multiplexing hyperlenses of the present invention, wherein: determining the distribution arrangement of the electromagnetic structures in the supercell according to the number of frequency bands includes determining the distribution arrangement of the electromagnetic structures in the supercell according to the number of frequency bands. number, divide the hypersurface into a corresponding number of grids, arrange them in the supercell, and the solid and dashed boxes along the diagonal correspond to the corresponding structures.

As a preferred solution of the multi-band wireless communication method based on spatial multiplexing hyperlens of the present invention, wherein: dividing the metasurface into square grids with a period p includes:

Determine the period p of the metasurface, and its calculation formula is:

Among them, λ is the operating wavelength and n is the required phase distribution accuracy;

The hypersurface is divided into square grids, and each square grid of size p×p represents a supercell.

As a preferred solution of the multi-band wireless communication method based on spatial multiplexing hyperlens of the present invention, wherein: selecting the basic unit of appropriate geometric parameters and performing spatial arrangement through the phase distribution formula includes the following steps:

According to the phase distribution formula, determine the phase required for each position on the metalens; where the phase distribution formula is as follows:

Among them, k is the wave number, f is the focal length, (x, y) is the position of the supercell;

Select a basic unit with matching inner and outer radii and opening angles according to the required phase distribution; calculate the phase response of the selected basic unit at the center frequency; for each position on the metalens, start from the pre-calculated phase of the basic unit Find the basic unit that best matches the required phase in the response; spatially arrange the basic unit: according to the results of the previous step, place the selected basic unit on the metalens in the required spatial arrangement; use electromagnetic simulation software to verify the entire metalens performance to ensure that the actual phase distribution is close enough to the required phase distribution.

As a preferred solution of the multi-band wireless communication method based on spatial multiplexing metalens according to the present invention, the designed metasurface structure is prepared using printed circuit board technology, the sample is packaged with the power sensor, and tested The emission efficiency of wireless communication signals of power sensors includes the following steps: use special PCB design software to draw circuit diagrams based on the metasurface structure; set appropriate line width, line spacing, and layer number parameters to meet electromagnetic performance requirements; export Gerber files, And carry out processing. After receiving the processed PCB sample, conduct visual inspection to ensure that there are no defects; package the sample and power sensor: select appropriate packaging materials and methods; accurately align and fix the metasurface structure and power sensor; check the packaged The overall structure ensures no mechanical damage or electrical connection problems; test the transmission efficiency of the power sensor wireless communication signal, including the following steps: prepare necessary test equipment, such as signal generators, spectrum analyzers, antennas, etc.; set test parameters, Connect the power sensor and test equipment and perform calibration; perform emission efficiency tests in a specific test environment; collect and analyze test data to evaluate the impact of the metasurface structure on signal emission efficiency.

In a second aspect, embodiments of the present invention provide a multi-band wireless communication system based on spatial multiplexing hyperlenses, which includes a frequency band and center frequency determination module that determines the frequency band range and center frequency of wireless communication according to requirements and restrictions. The basic unit design and arrangement module designs the subwavelength double-split ring electromagnetic structure as the basic unit and determines its arrangement in the supercell. The phase distribution matching module performs spatial arrangement according to the phase distribution formula of the focusing lens to match the required spatial phase distribution. Fabrication and test modules, which use printed circuit board processes to fabricate metasurface structures and package and test them with power sensors.

In a third aspect, embodiments of the present invention provide a computer device, including a memory and a processor. The memory stores a computer program, wherein: when the processor executes the computer program, the above-mentioned spatial multiplexing-based hyperlens is implemented. Any step of the multi-band wireless communication method.

In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium on which a computer program is stored, wherein: when the computer program is executed by a processor, the above-mentioned multi-band wireless communication based on spatial multiplexing hyperlenses is implemented. any step of the method.

The beneficial effect of the present invention is that the present invention proposes to use the subwavelength double-split ring electromagnetic structure as the basic unit of the metasurface. Changing the geometric parameters of the double-split ring electromagnetic structure can flexibly adjust the phase change of the electromagnetic field. By reasonably arranging double splitting ring electromagnetic structures with different structural parameters to form a spatially multiplexed hyperlens, the hyperlens's strong focusing effect on microwaves of different frequencies can be used to improve the gain of wireless communication signals. The spatial multiplexing hyperlens realizes multi-band wireless communication transmission at the same time, which can effectively improve the reliability of long-distance transmission of sensor wireless communication signals.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting any creative effort. in:

Figure 1 is the overall flow chart of the multi-band wireless communication method based on spatial multiplexing hyperlens.

Figure 2 is a side view of the electromagnetic structure of the stone double splitting ring based on the multi-band wireless communication method based on spatial multiplexing hyperlens.

Figure 3 is a schematic diagram of a supercell of a multi-band wireless communication method based on spatial multiplexing hyperlenses.

Figure 4 is a schematic diagram of the grid division of the spatial multiplexing hyperlens for the multi-band wireless communication method based on the spatial multiplexing hyperlens.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It is obvious that the described embodiments are part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by ordinary people in the art without creative efforts should fall within the protection scope of the present invention.

Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Those skilled in the art can do so without departing from the connotation of the present invention. Similar generalizations are made, and therefore the present invention is not limited to the specific embodiments disclosed below.

Second, reference herein to "one embodiment" or "an embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

The present invention will be described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for convenience of explanation, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which shall not limit the protection of the present invention. scope. In addition, the three-dimensional dimensions of length, width and depth should be included in actual production.

At the same time, in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention. The invention and simplified description are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore are not to be construed as limitations of the invention. Furthermore, the terms "first, second or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless otherwise clearly stated and limited in the present invention, the terms "installation, connection, and connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can also be a mechanical connection, an electrical connection, or a direct connection. A connection can also be indirectly connected through an intermediary, or it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Example 1

Referring to Figures 1 to 4, a first embodiment of the present invention is shown. This embodiment provides a multi-band wireless communication method based on spatial multiplexing hyperlens, including:

S1: Determine the frequency band range of multi-band wireless communication, and establish the corresponding center frequency according to different frequency bands.

S1.1: Determine the frequency band range.

Specifically, the frequency band range to be used by the wireless communication system is determined based on factors such as system application requirements, regulatory restrictions on available frequency bands, and frequency band transmission characteristics. When high-speed data transmission is required over a wide range, choose a frequency band with a lower frequency; when stable data transmission is required over a medium distance, choose a frequency band with a medium frequency; when high-speed data transmission over a short distance is required, choose a frequency band higher frequency band.

S1.2: Determine the center frequency according to different frequency bands.

Specifically, after determining the frequency band range, determine the center frequency of each frequency band. The center frequency is usually the middle frequency of the frequency band range and is also the frequency at which wireless communication equipment mainly works. In this embodiment, the center frequency is determined based on the bandwidth of the frequency band, the transmission performance of the signal, and the technical limitations of the device.

S1.3: Verification and adjustment.

Specifically, after the frequency band range and center frequency have been determined, the selection is verified through experiments and tests. If the test results meet the requirements, these frequency bands and center frequencies can be determined to be used. If the test results do not meet the requirements, adjust the frequency band range or center frequency, or both, or optimize the wireless communication system to adapt to these frequency bands and center frequencies.

S2: The subwavelength double-split ring electromagnetic structure is used as the basic unit of the metasurface.

It should be noted that the double-split ring electromagnetic structure consists of two concentric metal rings, each ring has a split. This structure can adjust the amplitude and phase response of the scattered field by changing the radius of the ring, the width and position of the split, etc. The subwavelength double split ring electromagnetic structure is composed of a dielectric layer and a metal layer. The dielectric layer can be made of tetrafluoroethylene with a thickness of 1mm; the metal layer can be made of copper with a thickness of 105μm. In this embodiment, the size of the structure is selected to be smaller than the operating wavelength, so that the structure can control the propagation of electromagnetic waves on a sub-wavelength scale, helping to achieve more precise focusing and transmission.

Furthermore, in this embodiment, the inner and outer radii of the double split ring electromagnetic structure range from 1 mm to 14 mm, and the opening angle ranges from 2° to 200°. According to these two condition ranges, the inner and outer radii of the double split ring electromagnetic structure are divided into small, medium and large sizes, and the opening angle is divided into small, medium and large openings.

It should be noted that the inner and outer radii are small sizes, specifically the inner radius is 1mm and the outer radius is 4mm. This size is small relative to the wavelength of high frequency applications and is therefore called a subwavelength structure. This small size structure is particularly useful in high frequency, narrowband, high sensitivity applications. First, the small size of the double split ring electromagnetic structure provides higher flexibility and selectivity. Due to the smaller size, more units can be arranged in a limited space, thereby achieving finer phase control and higher sensitivity. Secondly, small-sized structures usually have better response characteristics to high-frequency signals. In high-frequency applications, the small-sized double-split ring electromagnetic structure can achieve higher selectivity and sensitivity, helping to achieve precise control of specific high-frequency signals.

The inner and outer radii are of medium size, specifically the inner radius is 5mm and the outer radius is 9mm. This size provides good balanced performance in wireless communication applications. First, this size range is neither too large nor too small, suitable for medium-bandwidth and medium-sensitivity applications, and can meet the needs of many general wireless communication scenarios, such as communication networks in urban or industrial environments. Secondly, the 5mm and 9mm sizes are feasible in many commonly used manufacturing processes without incurring excessive manufacturing costs or negatively impacting the performance and reliability of the structure. Additionally, structures in this size range are compatible with many existing wireless communications systems and devices, simplifying integration and deployment.

The inner and outer radii are large, specifically the inner radius is 10mm and the outer radius is 14mm. The large size shows unique advantages in low-frequency wireless communication applications. First, this size allows for wider bandwidth and lower sensitivity, which is suitable for long-distance communications and communications in environments with many interference sources. It can increase the interaction area between electromagnetic waves and structures, thereby improving the ability to capture low-frequency signals. This is important for long-distance communications because low-frequency signals can penetrate obstacles and maintain strength over greater distances. Secondly, the large-sized structure can provide a wider bandwidth response, allowing it to handle a wider frequency range and can support higher data transmission rates and more complex signal modulation schemes. In addition, the size selection of 10mm and 14mm also considers process feasibility and cost-effectiveness. This size range is neither so large that it increases manufacturing complexity and cost, nor so small that it degrades low-frequency performance.

The small opening angle specifically refers to the opening angle between 2° and 66°, which is related to its characteristics in high-frequency, narrow-band, and high-sensitivity applications. First, the small opening angle increases the electromagnetic interaction of the structure, making it more responsive to high-frequency signals, thereby achieving precise control of specific high-frequency signals. Second, this angular range also helps provide narrow-band selectivity, making the structure's response to specific frequencies more prominent. Then, the small opening angle range matches high-frequency applications, making it perform well in high-frequency, narrow-band wireless communication scenarios.

A medium opening angle specifically refers to an opening angle between 67° and 133°. The selection of a medium opening angle of 67° to 133° is based on the balance requirement for the electromagnetic response of the double split ring electromagnetic structure. Within this angle range, the structure is able to achieve effective capture and transmission of IF signals while maintaining moderate bandwidth and sensitivity. This opening angle range also helps reduce performance fluctuations due to manufacturing errors or environmental factors, achieves moderate electromagnetic coupling, reduces costs and improves reliability, while further enhancing the applicability and efficiency of the structure, enabling it to be used in a wide range of applications. Achieve excellent performance in various application scenarios.

A large opening angle specifically means that the opening angle is between 134° and 200°. Within this opening angle range, due to the larger opening of the double splitting ring electromagnetic structure, more electromagnetic waves are allowed to enter and pass through the structure, which helps to enhance the capture ability of low-frequency signals. Furthermore, this opening angle range is suitable for low-sensitivity applications. The large opening reduces selectivity to specific frequencies, thereby adapting to applications where sensitivity is not critical, such as long-distance communications or communications in environments with many sources of interference.

S2.1: According to different scenarios and combined with the frequency band selection in S.1.1, subwavelength double-split ring electromagnetic structures with different sizes and openings are used as the basic unit of the metasurface.

When selecting a higher frequency band for high-speed data transmission in a wireless communication scenario that requires high precision and sensitivity, use a small size with an inner radius of 1mm, an outer radius of 4mm, and an opening angle of 2° to 66°. The open subwavelength double-split ring electromagnetic structure is used as the basic unit of the metasurface to be suitable for high-frequency, narrow-band, and high-sensitivity applications.

When selecting a frequency band with a moderate frequency for stable data transmission in wireless communication scenarios that require moderate bandwidth and sensitivity (such as communication networks in urban or industrial environments), use a medium size with an inner radius of 5mm and an outer radius of 9mm. The subwavelength double-split ring electromagnetic structure with a medium opening and an opening angle of 67° to 133° is used as the basic unit of the metasurface to be suitable for medium frequency, medium bandwidth, and medium sensitivity applications.

When selecting a lower frequency band that requires long-distance communication or communication in an environment with many interference sources, use a large size with an inner radius of 10mm, an outer radius of 14mm, and an opening angle of 134° to 200°. The open subwavelength double-split ring electromagnetic structure is used as the basic unit of the metasurface to be suitable for low-frequency, broadband, and low-sensitivity applications.

S2.2: Calculate the amplitude and phase changes of the electromagnetic field emitted by the structure when different geometric parameters are calculated at the center frequency.

Specifically, after determining the inner and outer radii and the opening angle, an equivalent circuit model is established, and the double split ring structure is expressed as an equivalent circuit in which the inductor L and the capacitor C are connected in parallel. Among them, the inductance L is calculated by the following formula:

Among them, r _outside represents the outer radius, r _inside represents the inner radius, and μ is the magnetic permeability of the material.

Further, the calculation formula of capacitance C is as follows:

Among them, C _{single split} represents the capacitance of a single split, C represents the total capacitance of two split capacitors connected in series, ε represents the permittivity of the medium, A represents the area of the cleavage, and d represents the width of the cleavage.

Further, the resonant frequency f _resonance is calculated through the inductor L and the capacitor C.

Furthermore, the response of the center frequency of the frequency band at this frequency is further analyzed under the resonant frequency f _resonance , including amplitude response and phase response. These responses describe how the system affects the signal passing through it.

The first is the corresponding impact on the amplitude: when the center frequency is at the f _resonance , the amplitude reaches its maximum value. Because the impedances of the inductor L and the capacitor C cancel each other at this time, the system impedance is minimum and the current is maximum, which helps to achieve the maximum gain of the signal, thus optimizing the communication distance and signal quality. When the center frequency is lower than f _resonance , the impedance of capacitor C is greater than the impedance of inductor L, the total impedance increases, and the amplitude gradually decreases. When the center frequency is higher than f _resonance , the impedance of the inductor L is greater than the impedance of the capacitor C, the total impedance increases, and the amplitude gradually decreases. It is suitable for wireless communication scenarios that require wider bandwidth and lower sensitivity, such as long-distance communication.

The second is the impact on the phase response: when the center frequency is at the f _resonance , the phase response is 90°. The impedances of the inductor L and the capacitor C are equal but 180° out of phase, so the total phase is 90°. When the center frequency is lower than f _resonance , the impedance of capacitor C dominates and the phase response gradually increases from 0° to 90°. When the center frequency is higher than f _resonance , the phase response gradually increases from 90° to 180°.

S3: Determine the distribution and arrangement of electromagnetic structures in the supercell according to the number of frequency bands.

Specifically, according to the number of frequency bands, the metasurface is divided into a corresponding number of grids, which are arranged in the supercell, and the solid and dashed boxes along the diagonal correspond to the corresponding structures. For example, in dual-band wireless communication, the supercell is divided into a 2×2 grid, and the solid and dotted boxes along the diagonal correspond to structure A and structure B respectively, as shown in Figure 3.

S4: Divide the metasurface into square grids with period p, select basic units with appropriate geometric parameters, and perform spatial arrangement through the phase distribution formula of the lens.

Specifically, the metasurface is divided into square grids with a period p, and each grid corresponds to a supercell; then basic units with appropriate geometric parameters are selected and spatially arranged through the phase distribution formula to accurately match the spatial multiplexing. Spatial phase distribution required for metalens.

S4.1: Divide the metasurface into square grids with period p.

Determine the period p of the metasurface, and its calculation formula is:

Among them, λ is the operating wavelength and n is the required phase distribution accuracy;

The hypersurface is divided into square grids, and each square grid of size p×p represents a supercell.

S4.2: Select the basic unit with appropriate geometric parameters and perform spatial arrangement through the phase distribution formula, including the following steps:

According to the phase distribution formula, determine the phase required for each position on the metalens; where the phase distribution formula is as follows:

Among them, k is the wave number, f is the focal length, (x, y) is the position of the supercell;

Select a basic unit with matching inner and outer radii and opening angles according to the required phase distribution; calculate the phase response of the selected basic unit at the center frequency; for each position on the metalens, start from the pre-calculated phase of the basic unit Find the basic unit that best matches the required phase in the response; spatially arrange the basic unit: according to the results of the previous step, place the selected basic unit on the metalens in the required spatial arrangement; use electromagnetic simulation software to verify the entire metalens performance to ensure that the actual phase distribution is close enough to the required phase distribution.

S5: Use the printed circuit board process to prepare the designed metasurface structure, package the sample with the power sensor, and test the emission efficiency of the power sensor's wireless communication signal.

Specifically, according to the metasurface structure, use special PCB design software to draw the circuit diagram; set appropriate line width, line spacing, and layer number parameters to meet the electromagnetic performance requirements; export the Gerber file and process it; receive the processed After PCB sample, conduct visual inspection to ensure no defects; sample and power sensor packaging: select appropriate packaging materials and methods; accurately align and fix the metasurface structure and power sensor; check the overall structure after packaging to ensure there is no mechanical damage or Electrical connection issues; test the transmission efficiency of wireless communication signals of power sensors, including the following steps: prepare necessary test equipment, such as signal generators, spectrum analyzers, antennas, etc.; set test parameters, connect power sensors and test equipment, and Perform calibration; conduct emission efficiency tests under specific test environments; collect and analyze test data to evaluate the impact of the metasurface structure on signal emission efficiency.

Furthermore, this embodiment also provides a multi-band wireless communication system based on spatial multiplexing hyperlens, including a frequency band and center frequency determination module, which determines the frequency band range and center frequency of wireless communication according to requirements and restrictions. The basic unit design and arrangement module designs the subwavelength double-split ring electromagnetic structure as the basic unit and determines its arrangement in the supercell. The phase distribution matching module performs spatial arrangement according to the phase distribution formula of the focusing lens to match the required spatial phase distribution. Fabrication and test modules, which use printed circuit board processes to fabricate metasurface structures and package and test them with power sensors.

This embodiment also provides a computer device suitable for multi-band wireless communication methods based on spatial multiplexing hyperlenses, including a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute computer-executable instructions. , implement the multi-band wireless communication method based on spatial multiplexing hyperlens as proposed in the above embodiment.

The computer device may be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Wherein, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes non-volatile storage media and internal memory. The non-volatile storage medium stores operating systems and computer programs. This internal memory provides an environment for the execution of operating systems and computer programs in non-volatile storage media. The communication interface of the computer device is used for wired or wireless communication with external terminals. The wireless mode can be implemented through WIFI, operator network, NFC (Near Field Communication) or other technologies. The display screen of the computer device may be a liquid crystal display or an electronic ink display. The input device of the computer device may be a touch layer covered on the display screen, or may be a button, trackball or touch pad provided on the computer device shell. , it can also be an external keyboard, trackpad or mouse, etc.

This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the multi-band wireless communication method based on spatial multiplexing hyperlenses is implemented as proposed in the above embodiment.

The storage medium proposed in this embodiment and the data storage method proposed in the above embodiment belong to the same inventive concept. Technical details that are not described in detail in this embodiment can be referred to the above embodiment, and this embodiment has the same benefits as the above embodiment. Effect.

In summary, the present invention proposes to use the subwavelength double-split ring electromagnetic structure as the basic unit of the metasurface. Changing the geometric parameters of the double-split ring electromagnetic structure can flexibly adjust the phase change of the electromagnetic field. By reasonably arranging double splitting ring electromagnetic structures with different structural parameters to form a spatially multiplexed hyperlens, the hyperlens's strong focusing effect on microwaves of different frequencies can be used to improve the gain of wireless communication signals. The spatial multiplexing hyperlens realizes multi-band wireless communication transmission at the same time, which can effectively improve the reliability of long-distance transmission of sensor wireless communication signals.

Example 2

Referring to Figures 1 to 4, a second embodiment of the present invention is shown. This embodiment provides a multi-band wireless communication method based on spatial multiplexing hyperlens. In order to verify the beneficial effects of the present invention, through economic benefit calculation and simulation Experiment for scientific demonstration.

As shown in Table 1, first determine the purpose and needs of the experiment, and select the appropriate inner and outer radius, opening angle and center frequency. Then, the basic unit of the subwavelength double-split ring electromagnetic structure is designed, and according to the phase distribution formula of the focusing lens, the structural primitives with appropriate geometric parameters are selected for spatial arrangement. Theoretical calculations and simulations are then performed using electromagnetic simulation software to verify the performance and efficiency of the design. The manufacturing stage includes using printed circuit board processing to prepare the designed metasurface structure, and packaging the sample with the power sensor. The test and measurement phase involves setting up the experimental environment and equipment, testing the emission efficiency of the power sensor wireless communication signal, and recording the experimental data. Finally, the experimental results are analyzed, compared with theoretical predictions, and the experimental findings and conclusions are summarized. The entire experimental process covers the entire process from design, simulation, manufacturing to testing, aiming to comprehensively evaluate the performance and applicability of metasurface structures.

Table 1 Test results of wireless communication signal emission efficiency of metasurface structure

According to Table 1, we can see the experimental results of the center frequency, resonant frequency, emission efficiency and phase response under different geometric parameters. These data are next analyzed to evaluate the performance and applicability of the metasurface structures. Under the 20MHz frequency band, the signal transmission efficiency is 80%. This efficiency is moderate and may be suitable for general wireless communication scenarios, such as communication networks in urban or industrial environments. At the 50MHz band, the efficiency increases to 85%, possibly due to the closer proximity to the resonant frequency, making it suitable for applications requiring higher sensitivity and bandwidth. Efficiency reaches 90% at the 100MHz band, probably corresponding to the resonant frequency and suitable for high-sensitivity applications requiring maximum gain. At the 150MHz and 200MHz frequency bands, the efficiency dropped to 88% and 86% respectively, which may be due to the deviation from the resonant frequency and is suitable for wireless communication scenarios that require wider bandwidth and moderate sensitivity.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solution of the present invention can be carried out. Modifications or equivalent substitutions without departing from the spirit and scope of the technical solution of the present invention shall be included in the scope of the claims of the present invention.

Claims (10)

1. A multi-band wireless communication method based on spatial multiplexing hyperlens, characterized by: including, Determine the frequency band range of multi-band wireless communication, and establish the corresponding center frequency according to different frequency bands; The subwavelength double-split ring electromagnetic structure is used as the basic unit of the metasurface; According to the number of frequency bands, the distribution arrangement of the electromagnetic structure in the supercell is determined; Cut the metasurface into square grids with period p, select basic units with appropriate geometric parameters, and perform spatial arrangement through the phase distribution formula; The designed metasurface structure is prepared using printed circuit board technology, the sample is packaged with the power sensor, and the emission efficiency of the power sensor's wireless communication signal is tested. 2. The multi-band wireless communication method based on spatial multiplexing hyperlens as claimed in claim 1, characterized in that: the determination of the frequency band range of multi-band wireless communication is based on the application requirements of the system, regulatory restrictions on available frequency bands and frequency bands. The transmission characteristics determine the frequency band range that the wireless communication system will use; When high-speed data transmission is required over a wide range, choose a frequency band with a lower frequency; when stable data transmission is required over a medium distance, choose a frequency band with a medium frequency; when high-speed data transmission over a short distance is required, choose a frequency band higher frequency bands; The step of establishing the corresponding center frequency according to different frequency bands is to use the intermediate frequency within the frequency band range as the center frequency after determining the frequency band range. 3. The multi-band wireless communication method based on spatial multiplexing hyperlens as claimed in claim 2, characterized in that: the sub-wavelength double splitting ring electromagnetic structure includes a dielectric layer and a metal layer, and the double splitting ring electromagnetic structure The inner and outer radii of the structure range from 1mm to 14mm, and the opening angle ranges from 2° to 200°. The inner and outer radii of the double splitting ring electromagnetic structure are divided into small sizes, medium sizes and large sizes, and the opening angles are Divided into small openings, medium openings and large openings; When selecting a higher frequency band, a subwavelength double-splitting ring electromagnetic structure with a small inner and outer radius and a small opening angle is used as the basic unit of the metasurface; When selecting a relatively medium frequency band, a subwavelength double-splitting ring electromagnetic structure with a medium inner and outer radius and a medium opening angle is used as the basic unit of the metasurface; When selecting a lower frequency band, a subwavelength double-splitting ring electromagnetic structure with large inner and outer radii and large opening angles is used as the metasurface basic unit. 4. The multi-band wireless communication method based on spatial multiplexing hyperlens according to claim 3, characterized in that: determining the distribution arrangement of the electromagnetic structures in the supercell according to the number of frequency bands includes according to the number of frequency bands. The number of frequency bands divides the metasurface into a corresponding number of grids, which are arranged in the supercell, and the solid and dashed boxes along the diagonal correspond to the corresponding structures. 5. The multi-band wireless communication method based on spatial multiplexing metalens as claimed in claim 4, characterized in that: dividing the metasurface into square grids with a period p includes: Determine the period p of the metasurface, and its calculation formula is: Among them, λ is the operating wavelength and n is the required phase distribution accuracy; The hypersurface is divided into square grids, and each square grid of size p×p represents a supercell. 6. The multi-band wireless communication method based on spatial multiplexing hyperlens as claimed in claim 5, characterized in that: the basic unit of selecting appropriate geometric parameters and spatial arrangement through the phase distribution formula includes the following steps: According to the phase distribution formula, determine the phase required for each position on the metalens; where the phase distribution formula is as follows: Among them, k is the wave number, f is the focal length, (x, y) is the position of the supercell; Select the basic unit with matching inner and outer radii and opening angles according to the required phase distribution; Calculate the phase response of the selected basic unit at the center frequency; For each position on the metalens, the basic unit that best matches the desired phase is found from the phase responses of the pre-computed basic units; Spatially arrange basic units: Based on the results of the previous step, place the selected basic units on the metalens in the required spatial arrangement; Use electromagnetic simulation software to verify the performance of the entire metalens, ensuring that the actual phase distribution is close enough to the desired phase distribution. 7. The multi-band wireless communication method based on spatial multiplexing metalens as claimed in claim 6, characterized in that: the designed metasurface structure is prepared using printed circuit board technology, and the sample and the power sensor are packaged, Testing the transmission efficiency of power sensor wireless communication signals includes the following steps: Use specialized PCB design software to draw circuit diagrams based on the metasurface structure; Set appropriate line width, line spacing, and layer number parameters to meet electromagnetic performance requirements; Export Gerber files and process them After receiving the processed PCB samples, conduct visual inspection to ensure there are no defects; Samples and Power Sensor Packages: Select appropriate packaging materials and methods; Precisely align and secure metasurface structures with power sensors; Check the overall structure after packaging to ensure there is no mechanical damage or electrical connection problems; Testing the transmission efficiency of wireless communication signals of power sensors includes the following steps: Prepare necessary test equipment, such as signal generators, spectrum analyzers, antennas, etc.; Set test parameters, connect power sensors and test equipment, and perform calibration; Conduct emission efficiency tests under specific test environments; Collect and analyze test data to evaluate the impact of metasurface structure on signal emission efficiency. 8. A multi-band wireless communication system based on spatial multiplexing hyperlens, based on the multi-band wireless communication method based on spatial multiplexing hyperlens according to any one of claims 1 to 7, characterized in that: including, A frequency band and center frequency determination module, which determines the frequency band range and center frequency of wireless communication according to requirements and restrictions; Basic unit design and arrangement module, which designs the subwavelength double-split ring electromagnetic structure as the basic unit and determines its arrangement in the supercell; Phase distribution matching module, which performs spatial arrangement according to the phase distribution formula of the focusing lens to match the required spatial phase distribution; Fabrication and test modules, which use printed circuit board processes to fabricate metasurface structures and package and test them with power sensors. 9. A computer device, including a memory and a processor. The memory stores a computer program. The feature is that when the processor executes the computer program, the spatial multiplexing method of any one of claims 1 to 7 is implemented. Steps of multi-band wireless communication method using metalens. 10. A computer-readable storage medium with a computer program stored thereon, characterized in that: when the computer program is executed by a processor, the multi-band multi-band system based on spatial multiplexing hyperlenses according to any one of claims 1 to 7 is realized. Steps of wireless communication method.