CN117375685A - Multiband wireless communication method and system based on spatial multiplexing superlens - Google Patents
Multiband wireless communication method and system based on spatial multiplexing superlens Download PDFInfo
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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
Technical Field
The invention relates to the technical field of wireless communication, in particular to a multiband wireless communication method and system based on a spatial multiplexing superlens.
Background
The high-voltage transmission line is used as a backbone network frame of the energy Internet, and the safety and stability of the backbone network frame ensure the social and economic operation. In recent years, the intelligent level of the power system is continuously improved, and the application of advanced sensing technology is wider. With the development of micro-nano sensing and MEMS technology, the novel power sensor has small volume, low cost, high response speed and high precision, becomes an indispensable means for intelligent sensing of power grid equipment state and the like, and more micro intelligent sensors are deployed in high-voltage transmission lines.
The intelligent perception is used as a new digital base, and the large-scale deployment and application of the intelligent perception are not separated from the high-speed, intelligent, safe and controllable wireless communication technology. In the intelligent monitoring of the power transmission line at a high voltage level, as communication signals are easy to be interfered under a high-voltage magnetic environment and the problem that the wireless communication technology is unreliable is solved, the gain of the wireless communication signals of the power sensor is still to be further improved, the problems of disconnection and packet loss of single-frequency-band wireless communication are easy to occur in the long-distance transmission process, the intelligent requirement of a power grid is difficult to be met, and the reliable and stable anti-interference wireless communication technology is required to be provided for meeting the wireless data transmission under the high-voltage environment.
Disclosure of Invention
The invention is provided in view of the problems existing in the existing multi-source power grid information fusion and system based on the Internet of things.
Therefore, the invention aims to provide a high-gain multi-band wireless communication scheme so as to solve the problems that the current power sensor wireless communication signal has lower gain and single-frequency signals are easy to drop.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a multiband wireless communication method based on a spatially multiplexed superlens, including determining a frequency band range of multiband wireless communication, and establishing a 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.
As a preferred embodiment of the spatial multiplexing superlens-based multiband wireless communication method according to the present invention, wherein: the determining of the frequency band range of the multi-band wireless communication is determining the frequency band range to be used by the wireless communication system based on the application requirements of the system, the regulatory limits of the available frequency bands, and the transmission characteristics of the frequency bands; when high-speed data transmission is required in a large range, selecting a frequency band with lower frequency; when stable data transmission is required to be carried out at a medium distance, selecting a frequency band with medium frequency; when high-speed data transmission in a short distance is needed, selecting a frequency band with higher frequency; the corresponding center frequency is established according to different frequency bands, and after the frequency band range is determined, the center frequency in the frequency band range is taken as the center frequency.
As a preferred embodiment of the spatial multiplexing superlens-based multiband wireless communication method according to the present invention, wherein: the sub-wavelength double-split ring electromagnetic structure comprises a dielectric layer and a metal layer, wherein the inner and outer radius range of the double-split ring electromagnetic structure is between 1mm and 14mm, the opening angle is between 2 degrees and 200 degrees, the inner and outer radius of the double-split ring electromagnetic structure is divided into small size, medium size and large size, and the opening angle is divided into small opening, medium opening and large opening; when a frequency band with higher frequency is selected, a sub-wavelength double split ring electromagnetic structure with small inner and outer radiuses and small opening angles is used as a super-surface basic unit; when a frequency band with medium frequency is selected, a sub-wavelength double split ring electromagnetic structure with medium inner and outer radiuses and medium opening angles is used as a super-surface basic unit; when a frequency band with lower frequency is selected, a sub-wavelength double split ring electromagnetic structure with large inner and outer radius and large opening angle is used as a super-surface basic unit.
As a preferred embodiment of the spatial multiplexing superlens-based multiband wireless communication method according to the present invention, wherein: the method comprises the steps of determining distribution arrangement of electromagnetic structures in the supercells according to the number of frequency bands, dividing the supersurface into grids with corresponding numbers according to the number of frequency bands, arranging the grids in the supercells, and respectively corresponding to the corresponding structures along a solid line frame and a dotted line frame of a diagonal line.
As a preferred embodiment of the spatial multiplexing superlens-based multiband wireless communication method according to the present invention, wherein: the slicing the subsurface into square grids with period p includes,
determining the period p of the hypersurface, wherein the calculation formula is as follows:
where λ is the operating wavelength and n is the required phase distribution accuracy;
the supersurface is split into square grids, each square grid of size p x p representing a supercell.
As a preferred embodiment of the spatial multiplexing superlens-based multiband wireless communication method according to the present invention, wherein: the selecting the basic units with proper geometric parameters and performing spatial arrangement through a phase distribution formula comprises the following steps:
determining a phase required by each position on the superlens according to a phase distribution formula; wherein, the phase distribution formula is as follows:
where k is the wave number, f is the focal length, (x, y) is the position of the supercell;
selecting basic units with matched inner and outer radiuses and opening angles according to the required phase distribution; calculating the phase response of the selected base unit at the center frequency; for each position on the superlens, finding the base unit that best matches the required phase from the pre-calculated phase response of the base unit; spatially arranged basic units: according to the result of the last step, placing the selected basic units on the superlens according to the required spatial arrangement; electromagnetic simulation software is used to verify the performance of the entire superlens, ensuring that the actual phase distribution is sufficiently close to the desired phase distribution.
As a preferred embodiment of the spatial multiplexing superlens-based multiband wireless communication method according to the present invention, wherein: the method for testing the emission efficiency of the wireless communication signal of the electric force sensor comprises the following steps of: drawing a circuit diagram by using special PCB design software according to the super-surface structure; setting proper line width, line distance and layer number parameters to meet electromagnetic performance requirements; exporting Gerber files, processing the Gerber files, and performing visual inspection after receiving processed PCB samples to ensure no defects; sample and power sensor package: selecting a proper packaging material and method; precisely aligning and fixing the super-surface structure with the power sensor; checking the whole structure after encapsulation to ensure no mechanical damage or electrical connection problem; the method for testing the emission efficiency of the wireless communication signal of the power sensor specifically comprises the following steps: preparing necessary test equipment such as a signal generator, a spectrum analyzer, an antenna and the like; setting test parameters, connecting the power sensor with test equipment, and calibrating; performing emission efficiency test under a specific test environment; test data are collected and analyzed to assess the effect of the supersurface structure on the efficiency of signal emission.
In a second aspect, embodiments of the present invention provide a spatially multiplexed superlens based multiband wireless communication system that includes a band and center frequency determination module that determines the band range and center frequency of wireless communication according to requirements and constraints. The basic unit design and arrangement module designs a sub-wavelength double split ring electromagnetic structure as a basic unit and determines the arrangement of the sub-wavelength double split ring electromagnetic structure in a supercell. And the phase distribution matching module is used for carrying out spatial arrangement according to a phase distribution formula of the focusing lens and matching the required spatial phase distribution. The manufacturing and testing module uses a printed circuit board process to manufacture the super surface structure and package and test the super surface structure with the power sensor.
In a third aspect, embodiments of the present invention provide a computer apparatus comprising a memory and a processor, the memory storing a computer program, wherein: the processor, when executing the computer program, implements any of the steps of the above-described spatial multiplexing superlens based multi-band wireless communication method.
In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, wherein: the computer program when executed by a processor performs any of the steps of the above-described spatial multiplexing superlens based multi-band wireless communication method.
The invention has the beneficial effects that the sub-wavelength double-split ring electromagnetic structure is taken as a basic unit of the super surface, and the phase change of the electromagnetic field can be flexibly adjusted by changing the geometric parameters of the double-split ring electromagnetic structure. The spatial multiplexing superlens is formed by reasonably arranging the double split ring electromagnetic structures with different structural parameters, and the strong focusing effect of the superlens on microwaves with different frequencies is utilized to improve the gain of wireless communication signals. The spatial multiplexing superlens simultaneously realizes the wireless communication transmission of multiple frequency bands, and can effectively improve the reliability of the sensor in the long-distance transmission of wireless communication signals.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is an overall flow chart of a multi-band wireless communication method based on spatially multiplexed superlenses.
Fig. 2 is a side view of a stone double split ring electromagnetic structure of a multiband wireless communication method based on a spatially multiplexed superlens.
Fig. 3 is a schematic diagram of a supercell of a multi-band wireless communication method based on spatially multiplexed superlenses.
Fig. 4 is a meshing schematic diagram of a spatially multiplexed superlens based multiband wireless communication method of spatially multiplexed superlenses.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
While the embodiments of the present invention will be described in detail with reference to the drawings, the cross-sectional view of the device structure will not be partially enlarged to general scale for convenience of description, and the drawings are merely illustrative and should not limit the scope of the invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Also 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", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present 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.
The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixed connection, detachable connection or integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1 to 4, a first embodiment of the present invention provides a multiband wireless communication method based on a spatial multiplexing superlens, including:
s1: a frequency band range of the multi-band wireless communication is determined, and a corresponding center frequency is established according to different frequency bands.
S1.1: a frequency band range is determined.
Specifically, the range of the frequency band to be used by the wireless communication system is determined based on factors such as the application requirements of the system, regulatory restrictions of the available frequency band, and transmission characteristics of the frequency band. When high-speed data transmission is required in a large range, selecting a frequency band with lower frequency; when stable data transmission is required to be carried out at a medium distance, selecting a frequency band with medium frequency; when high-speed data transmission at a short distance is required, a frequency band having a higher frequency is selected.
S1.2: the center frequency is determined from the different frequency bands.
Specifically, the center frequency of each frequency band is determined after the frequency band range is determined. The center frequency is typically the middle frequency of the band range and is also the frequency at which the wireless communication device is primarily operating. In the present embodiment, the center frequency is determined according to the bandwidth of the frequency band, the transmission performance of the signal, and the technical limit of the device.
S1.3: and (5) verifying and adjusting.
Specifically, after both the band range and the center frequency have been determined, the selection is verified through experiments and tests. If the test results meet the requirements, then it may be determined to use these bands and center frequencies. If the test results do not meet the requirements, the frequency band range or center frequency is adjusted, either both are adjusted, or the wireless communication system is optimized to accommodate these frequency bands and center frequencies.
S2: the sub-wavelength double-split ring electromagnetic structure is used as a super-surface basic unit.
It should be noted that the double split ring electromagnetic structure consists of two concentric metal rings, each having one split. This configuration can adjust the amplitude and phase response of the fringe field by varying the radius of the ring, the width and position of the cleave, etc. The sub-wavelength double-splitting ring electromagnetic structure is composed of a dielectric layer and a metal layer, wherein the dielectric layer can be made of a dielectric layer material which can be tetrafluoroethylene, and the thickness of the dielectric layer is 1mm; the metal layer can be made of copper material with a thickness of 105 μm. In this embodiment, the dimensions of the structure are chosen to be smaller than the operating wavelength, so that the structure is able to control the propagation of electromagnetic waves on a sub-wavelength scale, helping to achieve more accurate focusing and transmission.
Further, in the embodiment, the inner and outer radius ranges of the double split ring electromagnetic structure are 1 mm-14 mm, and the opening angle is 2 degrees-200 degrees. The inside and outside radii of the double split ring electromagnetic structure are divided into small, medium and large dimensions according to these two condition ranges, and the opening angles are divided into small, medium and large openings.
The inner and outer radii are small, specifically, the inner radius is 1mm and the outer radius is 4mm. This dimension is small relative to the wavelength of the high frequency application and is therefore referred to as a sub-wavelength structure. Such small-sized structures are particularly useful in high frequency, narrow band, high sensitivity applications. First, the small size of the dual split ring electromagnetic structure provides greater flexibility and selectivity, and due to the smaller size, more cells can be arranged in a limited space, thereby achieving finer phase control and higher sensitivity. Second, small-sized structures generally 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, which is conducive to achieving precise control over specific high frequency signals.
The inner and outer radii are medium-sized, specifically 5mm for the inner radius and 9mm for the outer radius, providing a good balance of performance in such sized wireless communication applications. First, this size range is neither too large nor too small, suitable for mid-bandwidth and mid-sensitivity applications, capable of meeting the needs of many general wireless communication scenarios, such as communication networks in urban or industrial environments. Second, dimensions of 5mm and 9mm are viable in many common manufacturing processes without incurring excessive manufacturing costs and negatively impacting the performance and reliability of the structure. Furthermore, this size range architecture is also compatible with many existing wireless communication systems and devices, thereby simplifying the integration and deployment process.
The inner and outer radii are large, specifically 10mm inner radius and 14mm outer radius, and the large size presents unique advantages in low frequency wireless communication applications. First, this size allows for a wider bandwidth and lower sensitivity, is suitable for long-range communications and communications in environments with many sources of interference, and can increase the interaction area of electromagnetic waves with structures, thereby improving the capture of low frequency signals. This is important for long-range communications because low frequency signals can penetrate obstacles and maintain strength over greater distances. Second, a large-sized structure may provide a wider bandwidth response, enabling it to handle a wider frequency range, may support higher data transmission rates and more complex signal modulation schemes. In addition, the choice of dimensions of 10mm and 14mm also allows for process feasibility and cost effectiveness. This size range is not so large as to increase manufacturing complexity and cost, nor so small as to reduce low frequency performance.
Whereas small opening angle means in particular an opening angle between 2 deg. and 66 deg., which is related to its characteristics in high frequency, narrow band, high sensitivity applications. First, the small opening angle increases the electromagnetic interaction of the structure, making it more responsive to high frequency signals, thereby enabling precise control of specific high frequency signals. Second, this angular range also helps to provide narrow band selectivity, making the response of the structure to a particular frequency more pronounced. The small opening angle range is then matched to high frequency applications, making it excellent in high frequency, narrowband wireless communication scenarios.
The opening angle is a medium opening, specifically, the opening angle is 67-133 degrees, and the medium opening angle 67-133 degrees is selected based on the balance requirement of electromagnetic response of the double split ring electromagnetic structure. Within this angular range, the structure enables efficient acquisition and transmission of the intermediate frequency signal while maintaining moderate bandwidth and sensitivity. The opening angle range is also beneficial to reducing performance fluctuation caused by manufacturing errors or environmental factors, realizing moderate electromagnetic coupling, reducing cost and improving reliability, and further enhancing the applicability and efficiency of the structure, so that the structure can realize excellent performance in a wide application scene.
The opening angle is a large opening, specifically, the opening angle is 134-200 degrees. Within this open angle range, the larger opening of the double split ring electromagnetic structure allows more electromagnetic waves to enter and pass through the structure, helping to enhance the capture of low frequency signals. Furthermore, this opening angle range is matched to low sensitivity applications. The large opening reduces selectivity to a particular frequency, thereby accommodating applications requiring less sensitivity, such as long-range communications or communications in environments with many sources of interference.
S2.1: according to different scenes and in combination with the frequency band selection in S.1.1, the sub-wavelength double split ring electromagnetic structure with different sizes and openings is adopted as a super-surface basic unit.
When a frequency band with higher frequency is selected to carry out high-speed data transmission in a wireless communication scene requiring high precision and high sensitivity, a sub-wavelength double-split ring electromagnetic structure with a small size of 1mm for an inner radius, 4mm for an outer radius and a small opening of 2-66 degrees for an opening angle is used as a super-surface basic unit, so that the ultra-surface double-split ring electromagnetic structure is suitable for high-frequency, narrow-band and high-sensitivity applications.
When a frequency band with medium frequency is selected for stable data transmission in a wireless communication scene (such as a communication network in an urban or industrial environment) requiring medium bandwidth and sensitivity, a medium-sized sub-wavelength double split ring electromagnetic structure with an inner radius of 5mm, an outer radius of 9mm and a medium opening with an opening angle of 67-133 degrees is used as a super-surface basic unit, so that the ultra-surface basic unit is suitable for medium-frequency, medium-bandwidth and medium-sensitivity applications.
When selecting a lower frequency band for communication over long distances or in environments with many sources of interference, a large-sized sub-wavelength dual split ring electromagnetic structure with an inner radius of 10mm, an outer radius of 14mm, and a large opening with an opening angle of 134 ° to 200 ° is used as a super-surface basic unit to be suitable for low-frequency, broadband, low-sensitivity applications.
S2.2: the amplitude phase change of the structure emergent electromagnetic field is calculated at different geometric parameters at the center frequency.
Specifically, after the inner radius, the outer radius and the opening angle are determined, an equivalent circuit model is established, and the double split ring structure is expressed as an equivalent circuit with an equivalent inductance L and an equivalent capacitance C connected in parallel. Wherein the inductance L is calculated by the following formula:
wherein r is Outer part Represents the outer radius, r Inner part Represents the inner radius and μ is the permeability of the material.
Further, the calculation formula of the capacitance C is as follows:
wherein C is Single split Representing the capacitance of a single split, C representing the total capacitance of a series of two split capacitances, epsilon representing the permittivity of the medium, a representing the split area, and d representing the split width.
Further, the resonant frequency f is calculated by the inductance L and the capacitance C Resonance wave 。
Further, at the resonant frequency f Resonance wave The response of the center frequency of the band at that frequency, including the amplitude response and the phase response, is further analyzed below, which describes how the system affects the signal passing through it.
First, the corresponding effect on amplitude: when the center frequency is f Resonance wave At this point, the amplitude reaches a maximum. Because the impedance of the inductor L and the capacitor C cancel each other at this time, the system impedance is minimum, the current is maximum, and the maximum gain of the signal is realized, so that the communication distance and the signal quality are optimized. With a center frequency lower than f Resonance wave When the impedance of the capacitor C is larger than the impedance of the inductor L, the total impedance increases and the amplitude gradually decreases. With a center frequency higher than f Resonance wave When the impedance of the inductance L is larger than that of the capacitance C, the total impedance increases, and the amplitude gradually decreases, so that the inductance L is suitable for wireless communication situations requiring wider bandwidth and lower sensitivity, such as long-distance communication.
The second is the effect on the phase response:when the center frequency is f Resonance wave At this point, the phase response is 90 °. The impedances of the inductance L and the capacitance C are equal but 180 deg. out of phase, so the total phase is 90 deg.. With a center frequency lower than f Resonance wave The impedance of the capacitor C dominates and the phase response gradually increases from 0 deg. to 90 deg.. With a center frequency higher than f Resonance wave At this time, the phase response gradually increases from 90 ° to 180 °.
S3: and determining the distribution arrangement of the electromagnetic structures in the supercells according to the number of the frequency bands.
Specifically, according to the number of frequency bands and the number of frequency bands, the super surface is divided into grids with corresponding numbers, the grids are arranged in the super cells, and the solid line frames and the dotted line frames along the diagonal lines correspond to corresponding structures respectively. For example, in dual-band wireless communication, the supercell is divided into a 2×2 grid, and a solid line frame and a dotted line frame along the diagonal line correspond to the structure a and the structure B, respectively, as shown in fig. 3.
S4: the super surface is segmented into square grids according to the period p, basic units with proper geometric parameters are selected, and space arrangement is carried out through a phase distribution formula of the lens.
Specifically, the super surface is divided into square grids according to a period p, and each grid corresponds to 1 super cell; then, basic units with proper geometric parameters are selected and spatially arranged through a phase distribution formula to accurately match the spatial phase distribution required by the spatial multiplexing superlens.
S4.1: the supersurface is sliced into square grids with a period p.
Determining the period p of the hypersurface, wherein the calculation formula is as follows:
where λ is the operating wavelength and n is the required phase distribution accuracy;
the supersurface is split into square grids, each square grid of size p x p representing a supercell.
S4.2: selecting basic units with proper geometric parameters, and performing spatial arrangement through a phase distribution formula comprises the following steps:
determining a phase required by each position on the superlens according to a phase distribution formula; wherein, the phase distribution formula is as follows:
where k is the wave number, f is the focal length, (x, y) is the position of the supercell;
selecting basic units with matched inner and outer radiuses and opening angles according to the required phase distribution; calculating the phase response of the selected base unit at the center frequency; for each position on the superlens, finding the base unit that best matches the required phase from the pre-calculated phase response of the base unit; spatially arranged basic units: according to the result of the last step, placing the selected basic units on the superlens according to the required spatial arrangement; electromagnetic simulation software is used to verify the performance of the entire superlens, ensuring that the actual phase distribution is sufficiently close to the desired phase distribution.
S5: 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.
Specifically, according to the super-surface structure, a circuit diagram is drawn by using special PCB design software; setting proper line width, line distance and layer number parameters to meet electromagnetic performance requirements; exporting a Gerber file, and processing; after receiving the processed PCB sample, performing visual inspection to ensure no defect; sample and power sensor package: selecting a proper packaging material and method; precisely aligning and fixing the super-surface structure with the power sensor; checking the whole structure after encapsulation to ensure no mechanical damage or electrical connection problem; the method for testing the emission efficiency of the wireless communication signal of the power sensor specifically comprises the following steps: preparing necessary test equipment such as a signal generator, a spectrum analyzer, an antenna and the like; setting test parameters, connecting the power sensor with test equipment, and calibrating; performing emission efficiency test under a specific test environment; test data are collected and analyzed to assess the effect of the supersurface structure on the efficiency of signal emission.
Further, the present embodiment also provides a multiband wireless communication system based on a spatial multiplexing superlens, which includes a band and center frequency determining module that determines a band range and a center frequency of wireless communication according to requirements and restrictions. The basic unit design and arrangement module designs a sub-wavelength double split ring electromagnetic structure as a basic unit and determines the arrangement of the sub-wavelength double split ring electromagnetic structure in a supercell. And the phase distribution matching module is used for carrying out spatial arrangement according to a phase distribution formula of the focusing lens and matching the required spatial phase distribution. The manufacturing and testing module uses a printed circuit board process to manufacture the super surface structure and package and test the super surface structure with the power sensor.
The embodiment also provides a computer device, which is applicable to the situation of the multiband wireless communication method based on the spatial multiplexing superlens, and comprises a memory and a processor; the memory is configured to store computer-executable instructions and the processor is configured to execute the computer-executable instructions to implement the spatial multiplexing superlens based multi-band wireless communication method as set forth in the above embodiments.
The computer device may be a terminal comprising a processor, a memory, a communication interface, a display screen and input means connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
The present embodiment also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements a multi-band wireless communication method based on spatially multiplexed superlenses as proposed by the above embodiments.
The storage medium according to the present embodiment belongs to the same inventive concept as the data storage method according to the above embodiment, and technical details not described in detail in the present embodiment can be seen in the above embodiment, and the present embodiment has the same advantageous effects as the above embodiment.
In summary, the invention proposes that the sub-wavelength double-split ring electromagnetic structure is used as a basic unit of the super surface, and the phase change of the electromagnetic field can be flexibly adjusted by changing the geometric parameters of the double-split ring electromagnetic structure. The spatial multiplexing superlens is formed by reasonably arranging the double split ring electromagnetic structures with different structural parameters, and the strong focusing effect of the superlens on microwaves with different frequencies is utilized to improve the gain of wireless communication signals. The spatial multiplexing superlens simultaneously realizes the wireless communication transmission of multiple frequency bands, and can effectively improve the reliability of the sensor in the long-distance transmission of wireless communication signals.
Example 2
Referring to fig. 1 to 4, for a second embodiment of the present invention, the embodiment provides a multiband wireless communication method based on a spatial multiplexing superlens, and in order to verify the beneficial effects of the present invention, scientific demonstration is performed through economic benefit calculation and simulation experiments.
As shown in table 1, the purpose and requirement of the experiment were first determined and the appropriate inside and outside radii, opening angle and center frequency were selected. Then designing a basic unit of the sub-wavelength double-split ring electromagnetic structure, and selecting structural elements with proper geometric parameters for spatial arrangement according to a phase distribution formula of the focusing lens. Theoretical calculations and simulations were then performed using electromagnetic simulation software to verify the performance and efficiency of the design. The manufacturing stage includes preparing the designed super surface structure by printed circuit board process, and packaging the sample and the power sensor. The testing and measuring stage involves setting up experimental environment and equipment, testing the transmission efficiency of the wireless communication signals of the power sensor, and recording experimental data. And finally, analyzing the experimental result, comparing with theoretical prediction, and summarizing experimental findings and conclusions. The whole experimental flow covers the whole process from design, simulation, manufacture and test, and aims to comprehensively evaluate the performance and applicability of the super-surface structure.
Table 1 ultra-surface structured wireless communication signal emission efficiency test results table
From the table 1, experimental results of center frequency, resonance frequency, emission efficiency and phase response at different geometrical parameters can be seen. The performance and applicability of the super-surface structure is then assessed by analyzing these data. At 20MHz band, the signal transmission efficiency is 80%, which is moderate, and may be suitable for general wireless communication scenarios, such as communication networks in urban or industrial environments. At the 50MHz band, efficiency improves to 85%, possibly due to closer proximity to the resonant frequency, for applications requiring higher sensitivity and bandwidth. At the 100MHz band, the efficiency reaches 90%, possibly corresponding to the resonant frequency, suitable for high sensitivity applications requiring maximum gain. Whereas at the 150MHz and 200MHz bands, the efficiency drops to 88% and 86%, respectively, which may be due to deviations from the resonant frequency, suitable for wireless communication scenarios requiring a wider bandwidth and moderate sensitivity.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (10)
1. A multi-band wireless communication method based on a spatial multiplexing superlens, characterized in that: comprising the steps of (a) a step of,
determining a frequency band range of the multi-band wireless communication, and establishing a 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.
2. The spatial multiplexing superlens based multi-band wireless communication method of claim 1, wherein: the determining of the frequency band range of the multi-band wireless communication is determining the frequency band range to be used by the wireless communication system based on the application requirements of the system, the regulatory limits of the available frequency bands, and the transmission characteristics of the frequency bands;
when high-speed data transmission is required in a large range, selecting a frequency band with lower frequency; when stable data transmission is required to be carried out at a medium distance, selecting a frequency band with medium frequency; when high-speed data transmission in a short distance is needed, selecting a frequency band with higher frequency;
the corresponding center frequency is established according to different frequency bands, and after the frequency band range is determined, the center frequency in the frequency band range is taken as the center frequency.
3. The spatial multiplexing superlens based multi-band wireless communication method of claim 2, wherein: the sub-wavelength double-split ring electromagnetic structure comprises a dielectric layer and a metal layer, wherein the inner and outer radius range of the double-split ring electromagnetic structure is between 1mm and 14mm, the opening angle is between 2 degrees and 200 degrees, the inner and outer radius of the double-split ring electromagnetic structure is divided into small size, medium size and large size, and the opening angle is divided into small opening, medium opening and large opening;
when a frequency band with higher frequency is selected, a sub-wavelength double split ring electromagnetic structure with small inner and outer radiuses and small opening angles is used as a super-surface basic unit;
when a frequency band with medium frequency is selected, a sub-wavelength double split ring electromagnetic structure with medium inner and outer radiuses and medium opening angles is used as a super-surface basic unit;
when a frequency band with lower frequency is selected, a sub-wavelength double split ring electromagnetic structure with large inner and outer radius and large opening angle is used as a super-surface basic unit.
4. A method of multiband wireless communication based on spatially multiplexed superlenses according to claim 3, wherein: the method comprises the steps of determining distribution arrangement of electromagnetic structures in the supercells according to the number of frequency bands, dividing the supersurface into grids with corresponding numbers according to the number of frequency bands, arranging the grids in the supercells, and respectively corresponding to the corresponding structures along a solid line frame and a dotted line frame of a diagonal line.
5. The spatial multiplexing superlens based multi-band wireless communication method according to claim 4, wherein: the slicing the subsurface into square grids with period p includes,
determining the period p of the hypersurface, wherein the calculation formula is as follows:
where λ is the operating wavelength and n is the required phase distribution accuracy;
the supersurface is split into square grids, each square grid of size p x p representing a supercell.
6. The spatial multiplexing superlens based multi-band wireless communication method according to claim 5, wherein: the selecting the basic units with proper geometric parameters and performing spatial arrangement through a phase distribution formula comprises the following steps:
determining a phase required by each position on the superlens according to a phase distribution formula; wherein, the phase distribution formula is as follows:
where k is the wave number, f is the focal length, (x, y) is the position of the supercell;
selecting basic units with matched inner and outer radiuses and opening angles according to the required phase distribution;
calculating the phase response of the selected base unit at the center frequency;
for each position on the superlens, finding the base unit that best matches the required phase from the pre-calculated phase response of the base unit;
spatially arranged basic units: according to the result of the last step, placing the selected basic units on the superlens according to the required spatial arrangement;
electromagnetic simulation software is used to verify the performance of the entire superlens, ensuring that the actual phase distribution is sufficiently close to the desired phase distribution.
7. The spatial multiplexing superlens based multi-band wireless communication method according to claim 6, wherein: the method for testing the emission efficiency of the wireless communication signal of the electric force sensor comprises the following steps of:
drawing a circuit diagram by using special PCB design software according to the super-surface structure;
setting proper line width, line distance and layer number parameters to meet electromagnetic performance requirements;
export Gerber file and process
After receiving the processed PCB sample, performing visual inspection to ensure no defect;
sample and power sensor package:
selecting a proper packaging material and method;
precisely aligning and fixing the super-surface structure with the power sensor;
checking the whole structure after encapsulation to ensure no mechanical damage or electrical connection problem;
the method for testing the emission efficiency of the wireless communication signal of the power sensor specifically comprises the following steps:
preparing necessary test equipment such as a signal generator, a spectrum analyzer, an antenna and the like;
setting test parameters, connecting the power sensor with test equipment, and calibrating;
performing emission efficiency test under a specific test environment;
test data are collected and analyzed to assess the effect of the supersurface structure on the efficiency of signal emission.
8. A multi-band wireless communication system based on a spatially multiplexed superlens, a multi-band wireless communication method based on a spatially multiplexed superlens according to any one of claims 1 to 7, characterized in that: comprising the steps of (a) a step of,
a band and center frequency determination module that determines a band range and a center frequency of the wireless communication according to the requirements and restrictions;
the basic unit design and arrangement module is used for designing a sub-wavelength double-splitting ring electromagnetic structure as a basic unit and determining the arrangement of the sub-wavelength double-splitting ring electromagnetic structure in a supercell;
the phase distribution matching module is used for carrying out spatial arrangement according to a phase distribution formula of the focusing lens and matching the required spatial phase distribution;
the manufacturing and testing module uses a printed circuit board process to manufacture the super surface structure and package and test the super surface structure with the power sensor.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that: the processor, when executing the computer program, implements the steps of the spatial multiplexing superlens based multi-band wireless communication method of any of claims 1-7.
10. A computer-readable storage medium having stored thereon a computer program, characterized by: the computer program when executed by a processor implements the steps of the spatial multiplexing superlens based multiband wireless communication method according to any of claims 1-7.
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