Complementary split ring resonance device and design method

Abstract

The invention discloses a complementary split ring resonance device and a design method, and belongs to the technical field of power equipment insulation state monitoring. A geometric structure of an initial resonance device is adjusted, and an opening is formed on the basis of a circular ring to obtain a first split ring and a second split ring; the second split ring is nested into the first split ring to form the complementary split ring, then the geometric parameters of the complementary split ring are iterated, the geometric parameters with the best performance are selected, and the structure of the complementary split ring is synchronously adjusted to obtain the complementary split ring resonance device, so that the coupling points are increased, the local field enhancement effect is improved, and the resonance effect of the complementary split ring is improved. And on the premise that the number of coupling points is increased, due to the double-ring nested structure, energy leaked from the opening is limited, energy leakage is reduced, electric field distribution is more uniform, field intensity distribution regularity is improved, and therefore the energy transmission efficiency during coupling is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of insulation status monitoring of electric power equipment, and in particular to a complementary split ring resonance device and a design method thereof. Background Art

[0002] In recent years, material detection technology based on microwave resonance has gradually developed. This technology evaluates the moisture content of materials by changes in resonant frequency, and has significant advantages such as fast response speed (seconds), non-destructive testing, and portable equipment. At the same time, by improving the resonator structure design and optimization algorithm, the sensitivity and reliability of detection have been significantly improved. However, as the number of coupling points of the existing resonator increases, its internal field distribution is uneven. In the multi-point coupling design, the electric field and magnetic field distribution inside the resonator are often uneven, resulting in an unstable resonant mode. The field strength in some areas is too high, which may cause overheating or energy loss, while the field strength in some areas is too low, reducing the coupling efficiency. In order to maintain the stability of the resonant mode, the structure of the resonant device is relatively complex, which increases the operation time and is easy to sample and damage the insulating paper, thereby reducing the accuracy of the moisture detection of the insulating paperboard.

[0003] like Figure 1 As shown in FIG. 1 , an existing ring-structured resonant device is connected to two microstrip lines, and a coupling point is located between the ring and the two microstrip lines. When in a resonant state, the electric field is distributed on the ring, and there is obvious energy attenuation at the coupling point, thereby reducing the transmission efficiency of the resonant device. Figure 2 As shown, in order to solve Figure 1 In order to solve the problem in the experiment, an opening is designed on the basis of the circular ring structure, and a new coupling point is formed at the opening. When in the resonant state, the electric field is concentrated near the opening, and a strong local field enhancement effect is formed during resonance, which reduces the energy attenuation to a certain extent and improves the transmission efficiency. However, the opening will cause some energy leakage, so that its overall field strength may not be as good as that of the closed circular ring. Therefore, it is still difficult to completely solve the problem of low energy transmission efficiency in the resonant state. Summary of the invention

[0004] In order to solve the problem of low transmission efficiency caused by excessive energy loss during coupling due to uneven field distribution inside the existing resonance device, the present invention provides a design method for a complementary split ring resonance device. By adjusting the geometric structure of the initial resonance device, an opening is provided on the basis of a circular ring to obtain a first split ring and a second split ring, and the second split ring is nested in the first split ring to form a complementary split ring. The geometric parameters of the complementary split rings are then iterated in sequence, and the geometric parameters with the best performance are selected and the structure of the complementary split rings are synchronously adjusted to obtain a complementary split ring resonance device. Not only the coupling points are increased, thereby improving the local field enhancement effect, but also, under the premise of increasing the coupling points, due to the double-ring nested structure, the energy leaked at the opening is limited, the energy leakage is reduced, the electric field distribution is made more uniform, the regularity of the field strength distribution is improved, and thus the energy transmission efficiency during coupling is improved.

[0005] In a first aspect, a technical solution provided in an embodiment of the present invention is: a complementary split ring resonant device design method, comprising the following steps: S1. Determine the main resonant frequency of the complementary split ring resonator device based on the resonance requirement; S2. The resonant coupling principle determines the basic geometric parameters of the complementary split ring resonator device in response to the main resonant frequency; S3. Based on basic geometric parameters, the geometric structure of the initial resonant device is adjusted to obtain a first split ring and a second split ring; S4. The first split ring and the second split ring are nested to obtain a complementary split ring; based on the coupling parameter iteration principle, the basic geometric parameters of the complementary split rings are iterated to obtain optimal coupling parameters, and based on the optimal coupling parameters, the structure of the complementary split rings is adjusted to obtain a complementary split ring resonant device.

[0006] In this scheme, a complementary split ring is formed by nesting the first split ring and the second split ring, and the basic geometric parameters are iterated based on the coupling parameter iteration principle to obtain the optimal coupling parameters, which can significantly improve the coupling effect inside the resonant device, thereby improving its overall performance and efficiency. By adjusting the structure of the complementary split ring to meet the optimal coupling parameters, the overall performance of the resonant device can be further improved, including improving the stability of the resonant frequency, enhancing the resonance efficiency, reducing energy loss, etc.; by forming a strong local electric field enhancement effect at the opening, the electromagnetic energy coupling in a specific direction is promoted, and by increasing the coupling points, the electric field distribution around the resonator can be changed to make the electric field more uniform or enhance the field strength in a specific area; by increasing the coupling points and the opening design, the flexibility of the electromagnetic coupling path can be improved, which is suitable for multi-band operation or complex electromagnetic environment; by introducing a non-uniform distribution of inductance and capacitance at the opening, the resonant frequency can be adjusted by the size, shape or position of the opening, so that it usually has a lower resonant frequency, which is suitable for miniaturized electromagnetic device design; by increasing the coupling points, more electromagnetic energy transmission paths are provided, thereby improving the overall energy coupling efficiency, and the multi-point coupling structure can reduce the local energy loss that may be caused by single-point coupling and improve the transmission efficiency of the system.

[0007] Preferably, in S2, the resonant coupling principle determines the basic geometric parameters of the complementary split ring resonator device in response to the main resonant frequency, comprising the following steps: Determine the estimated inductance and estimated capacitance of the complementary split ring resonant device based on the main resonant frequency and the resonant frequency calculation formula; Based on the estimated inductance, a basic opening angle and a basic opening width of the complementary split ring resonant device are obtained; based on the estimated capacitance, a basic ring radius and a basic ring number of the complementary split ring resonant device are obtained; The basic opening angle, basic opening width, basic ring radius and basic ring quantity of the complementary split ring resonator device serve as basic geometric parameters of the complementary split ring resonator device.

[0008] In this scheme, by accurately calculating the estimated inductance and estimated capacitance, it is possible to ensure that the design of the complementary split-ring resonant device is more accurate, which helps to achieve a more stable resonant frequency and higher resonant efficiency in practical applications; the basic opening angle and basic opening width obtained based on the estimated inductance, as well as the basic ring radius and basic ring number obtained based on the estimated capacitance are key geometric parameters of the complementary split-ring resonant device. By accurately calculating these parameters, it is possible to ensure that the structure of the resonant device is more reasonable, thereby improving its overall performance. Since a reasonable geometric structure also helps to improve the stability of the resonant frequency, the resonant device performs well in a wider range of application scenarios, thereby helping to reduce the energy loss of the resonant device during the resonance process and improve the resonance efficiency.

[0009] Preferably, in S3, adjusting the geometric structure of the initial resonant device based on the basic geometric parameters to obtain the first split ring and the second split ring comprises the following steps: The shape of the initial resonance device is adjusted to a circle to obtain a basic ring, and the number of the basic rings is set to two to obtain a first basic ring and a second basic ring; An opening is designed on the upper part or the lower part of the first base ring to obtain a first split ring; an opening is designed on the upper part or the lower part of the second base ring to obtain a second split ring.

[0010] In this solution, the split ring is formed by designing an opening, which provides adjustability for the resonant device, allowing engineers to adjust the size, position and number of the openings as needed to optimize the resonant performance. For example, by changing the size of the opening, the resonant frequency and bandwidth can be adjusted to meet specific application requirements; the split ring design you just used helps to enhance the resonance effect. When current passes through the split ring, it generates additional electric and magnetic fields at the opening. These fields interact with the fields generated by the base ring, thereby enhancing the overall resonance effect, reducing the local energy loss that may be caused by single-point coupling, and improving the overall energy coupling efficiency.

[0011] Preferably, the radius of the first base ring is smaller than the radius of the second base ring.

[0012] In this solution, since the first split ring and the second split ring need to be nested with each other, the radius of one of the split rings must be smaller than the radius of the other split ring so that one of the split rings can be nested in the other split ring.

[0013] Preferably, in S4, based on the coupling parameter iteration principle, the basic geometric parameters of the complementary split rings are iterated to obtain the optimal coupling parameters, including the following steps: The gap between the first split ring and the second split ring in the complementary split ring is detected to obtain an initial coupling gap, the initial coupling gap between the first split ring and the second split ring is kept unchanged, the opening widths of the first split ring and the second split ring are increased in sequence based on a set step size, and the insertion loss of the complementary split ring is detected synchronously, and the opening width corresponding to the minimum insertion loss is taken as the optimal opening width; The coupling impedance is determined based on the resonance requirement, and the optimal microstrip line parameters are determined based on the coupling impedance and the optimal opening width; the microstrip line parameters and the optimal opening width are used as the optimal coupling parameters.

[0014] In this scheme, by accurately measuring and adjusting the initial coupling gap between the first split ring and the second split ring, and gradually increasing the opening width and synchronously detecting the insertion loss, the optimal opening width that minimizes the insertion loss can be found, ensuring that the resonant device has the best resonance effect at a specific frequency, thereby improving its performance; by adopting the method of setting a step size to increase the opening width in sequence, the influence of different opening widths on the resonance performance can be systematically explored, which not only improves the efficiency of the experiment, but also ensures the accuracy of the results by synchronously detecting the insertion loss; by determining the optimal coupling parameters to accurately design and adjust the resonant device, the influence of external interference and internal errors on the resonance performance can be minimized, which not only improves the performance of the resonant device, but also enhances its stability and reliability, and once the optimal coupling parameters are determined, since it is known which parameters have a significant impact on the performance, problems can be quickly located and solved when they occur, which also reduces the difficulty of debugging and maintaining the resonant device.

[0015] Preferably, in S4, adjusting the structure of the complementary split ring based on the optimal coupling parameter to obtain a complementary split ring resonant device comprises the following steps: Adjusting the basic opening widths of the first split ring and the second split ring in the complementary split rings based on the optimal opening width; Two microstrip lines with corresponding parameters are selected based on the optimal microstrip line parameters, and a complementary split ring is respectively connected to the input end and the output end of the two microstrip lines to obtain a complementary split ring resonant device.

[0016] In this scheme, by adjusting the basic opening width of the split ring in the complementary split ring to the optimal value, the resonant frequency and bandwidth of the resonant device can be accurately controlled, thereby ensuring that the resonant device has excellent performance within a specific frequency range, such as high Q value, low insertion loss, etc.; by selecting the optimal opening width, it helps to reduce the loss of energy in the resonance process, thereby improving the efficiency of the resonant device. At the same time, by optimizing the parameters of the microstrip line, the transmission loss can be further reduced and the output power can be increased; by accurately adjusting the opening width of the split ring and selecting the optimal microstrip line parameters, it can be ensured that the resonant device has stable performance under different environmental conditions, thereby ensuring output stability.

[0017] Preferably, the optimal microstrip line parameters at least include the microstrip line width and the thickness of the microstrip line substrate.

[0018] In this scheme, since the complementary split ring needs to be coupled with the microstrip line to achieve the resonance effect, the performance of the complementary split ring resonant device depends not only on the geometric parameters of the complementary split ring, but also on the parameters of the microstrip line. Therefore, in order to obtain a resonant device with the best performance that can meet the resonance requirements, the parameters of the microstrip line also need to be considered.

[0019] In a second aspect, an embodiment of the present invention provides a technical solution: a complementary split ring resonant device, comprising a complementary split ring and a microstrip line; The complementary split rings include a first split ring and a second split ring in a double ring nested structure; The upper or lower parts of the first split ring and the second split ring are provided with openings; The complementary split rings are coupled between two microstrip lines to form a coupling point.

[0020] In this scheme, by adopting a double-ring nested structure and microstrip line coupling, not only the coupling points are increased, thereby improving the local field enhancement effect, but also under the premise of increasing the coupling points, the double-ring nested structure limits the energy leaked at the opening, reduces energy leakage, makes the electric field distribution more uniform, improves the regularity of field strength distribution, and thus improves the energy transmission efficiency during coupling.

[0021] Preferably, in the complementary split rings, the opening position of the first split ring and the opening position of the second split ring are symmetrically distributed with the microstrip line as the symmetry axis.

[0022] In this solution, since the first split ring and the second split ring need to be nested with each other to reduce energy leakage at the opening, in order to minimize energy leakage, the opening position of the first split ring and the opening position of the second split ring are symmetrically distributed with the microstrip line as the symmetry axis, which helps to reduce the slope of the electromagnetic energy, thereby increasing the coupling energy and improving the overall field strength.

[0023] Preferably, the second split ring is nested in the first split ring.

[0024] In this solution, since the first split ring needs to be nested with the second split ring to form a complementary split ring, and the radius of the second split ring is smaller than that of the first split ring, the second split ring is nested in the first split ring, which limits the energy leaked at the opening, reduces energy leakage, makes the electric field distribution more uniform, improves the regularity of the field strength distribution, and thus improves the energy transmission efficiency during coupling.

[0025] The beneficial effects of the present invention are as follows: (1) The present invention forms a complementary split ring by nesting the first split ring and the second split ring, and iterates the basic geometric parameters based on the coupling parameter iteration principle to obtain the optimal coupling parameters, which can significantly improve the coupling effect inside the resonant device, thereby improving its overall performance and efficiency. By adjusting the structure of the complementary split ring to meet the optimal coupling parameters, the overall performance of the resonant device can be further improved, including improving the stability of the resonant frequency, enhancing the resonant efficiency, reducing energy loss, etc.; (2) The present invention promotes electromagnetic energy coupling in a specific direction by forming a strong local electric field enhancement effect at the opening. By increasing the coupling points, the electric field distribution around the resonator can be changed to make the electric field more uniform or enhance the field strength in a specific area. By increasing the coupling points and the opening design, the flexibility of the electromagnetic coupling path can be improved, which is suitable for multi-band operation or complex electromagnetic environment. (3) The present invention introduces a non-uniform distribution of inductance and capacitance into the opening, so that the resonant frequency can be adjusted by the size, shape or position of the opening, so that it usually has a lower resonant frequency and is suitable for the design of miniaturized electromagnetic devices; (4) The present invention increases the number of electromagnetic energy transmission paths by increasing the coupling points, thereby improving the overall energy coupling efficiency. The multi-point coupling structure can reduce the local energy loss that may be caused by single-point coupling and improve the transmission efficiency of the system.

[0026] The above invention content is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts.

[0028] Figure 1 It is a structural diagram of an existing ring resonance device; Figure 2 It is a structural diagram of an existing split ring resonance device; Figure 3 A flow chart of a complementary split ring resonant device design method of the present invention; Figure 4 It is a structural diagram of the complementary split ring resonance device of the present invention; Figure 5 Insertion loss curve diagram of resonators with different opening widths of the present invention; Figure 6 Schematic diagram of transmission efficiency of the ring resonator; Figure 7 Schematic diagram of the transmission efficiency of the split ring resonator; Figure 8 Schematic diagram of the transmission efficiency of the complementary split-ring resonator. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the drawings; the process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0031] Example 1: Figure 3 As shown, in order to solve the problem of low transmission efficiency caused by excessive energy loss during coupling due to uneven field distribution inside the existing resonant device, this embodiment provides a complementary split ring resonant device design method, including the following steps: S1: Determine the main resonant frequency of the complementary split ring resonator based on the resonance requirement, taking the ring radius as an example, the specific formula is as follows: Where c is the speed of light, ε eff is the effective dielectric constant and R is the ring radius.

[0032] S2: The resonant coupling principle determines the basic geometric parameters of the complementary split-ring resonator device in response to the main resonant frequency.

[0033] In this embodiment, the resonant coupling principle determines the basic geometric parameters of the complementary split ring resonator device in response to the main resonant frequency, including the following steps: Determine the estimated inductance and estimated capacitance of the complementary split ring resonant device based on the main resonant frequency and the resonant frequency calculation formula; Based on the estimated inductance, a basic opening angle and a basic opening width of the complementary split ring resonant device are obtained; based on the estimated capacitance, a basic ring radius and a basic ring number of the complementary split ring resonant device are obtained; The basic opening angle, basic opening width, basic ring radius and basic ring quantity of the complementary split ring resonator device serve as basic geometric parameters of the complementary split ring resonator device.

[0034] This embodiment can ensure that the design of the complementary split ring resonant device is more accurate by accurately calculating the estimated inductance and the estimated capacitance, which helps to achieve a more stable resonant frequency and a higher resonant efficiency in practical applications; the basic opening angle and the basic opening width obtained based on the estimated inductance, and the basic ring radius and the number of basic rings obtained based on the estimated capacitance are key geometric parameters of the complementary split ring resonant device. By accurately calculating these parameters, it can be ensured that the structure of the resonant device is more reasonable, thereby improving its overall performance. Since a reasonable geometric structure also helps to improve the stability of the resonant frequency, the resonant device performs well in a wider range of application scenarios, thereby helping to reduce the energy loss of the resonant device during the resonance process and improve the resonance efficiency.

[0035] S3: Adjusting the geometric structure of the initial resonant device based on basic geometric parameters to obtain a first split ring and a second split ring.

[0036] In this embodiment, adjusting the geometric structure of the initial resonant device based on the basic geometric parameters to obtain the first split ring and the second split ring includes the following steps: The shape of the initial resonance device is adjusted to a circle to obtain a basic ring, and the number of the basic rings is set to two to obtain a first basic ring and a second basic ring; An opening is designed on the upper part or the lower part of the first base ring to obtain a first split ring; an opening is designed on the upper part or the lower part of the second base ring to obtain a second split ring.

[0037] This embodiment provides adjustability for the resonant device by designing openings to form split rings, thereby allowing engineers to adjust the size, position and number of openings as needed to optimize the resonant performance. For example, by changing the size of the openings, the resonant frequency and bandwidth can be adjusted to meet specific application requirements. The split ring design you just adopted helps to enhance the resonance effect. When current passes through the split ring, it generates additional electric and magnetic fields at the openings. These fields interact with the fields generated by the base ring, thereby enhancing the overall resonance effect, reducing the local energy loss that may be caused by single-point coupling, and improving the overall energy coupling efficiency.

[0038] In this embodiment, the radius of the first base ring is smaller than the radius of the second base ring.

[0039] In this embodiment, since the first split ring and the second split ring need to be nested with each other, the radius of one of the split rings must be smaller than the radius of the other split ring so that one of the split rings can be nested in the other split ring.

[0040] S4: Nesting the first split ring and the second split ring to obtain a complementary split ring; iterating the basic geometric parameters of the complementary split ring based on the coupling parameter iteration principle to obtain the optimal coupling parameters, and adjusting the structure of the complementary split ring based on the optimal coupling parameters to obtain a complementary split ring resonant device.

[0041] In this embodiment, based on the coupling parameter iteration principle, the basic geometric parameters of the complementary split rings are iterated to obtain the optimal coupling parameters, including the following steps: The gap between the first split ring and the second split ring in the complementary split ring is detected to obtain an initial coupling gap. In this embodiment, the initial coupling gap is 0.4 mm. The initial coupling gap of the first split ring and the second split ring is kept unchanged. The opening widths of the first split ring and the second split ring are increased in sequence based on a set step of 0.2 mm. Synchronously, the insertion loss of the complementary split ring is detected, and the opening width corresponding to the minimum insertion loss is taken as the optimal opening width, such as Figure 5 As shown in the figure, the coupling gap is 0.4mm and the opening width is 0.4mm. At this time, the resonance peak has no side peaks, the main peak is significant and the loss is low. Compared with the circular ring resonator, the resonance peaks of the microstrip split ring resonator increase to 6, carrying more abundant resonance information; The coupling impedance is determined based on the resonance requirements. The design target coupling impedance is 50Ω. The optimal microstrip line parameters are determined based on the coupling impedance and the optimal opening width. The specific formula is as follows: Among them, Z 0 represents the characteristic impedance of the microstrip line, ε r The dielectric constant of the substrate, h represents the thickness of the microstrip line substrate, and w is the width of the microstrip line; The microstrip line parameters and the optimal opening width are taken as the optimal coupling parameters.

[0042] This embodiment can find the optimal opening width that minimizes the insertion loss by accurately measuring and adjusting the initial coupling gap between the first split ring and the second split ring, and gradually increasing the opening width and synchronously detecting the insertion loss, thereby ensuring that the resonant device has the best resonance effect at a specific frequency, thereby improving its performance; by adopting a method of increasing the opening width in sequence by setting a step size, the influence of different opening widths on the resonance performance can be systematically explored, which not only improves the efficiency of the experiment, but also ensures the accuracy of the results by synchronously detecting the insertion loss; by determining the optimal coupling parameters to accurately design and adjust the resonant device, the influence of external interference and internal errors on the resonance performance can be minimized, which not only improves the performance of the resonant device, but also enhances its stability and reliability. Once the optimal coupling parameters are determined, since it is known which parameters have a significant impact on the performance, problems can be quickly located and solved when they occur, which also reduces the difficulty of debugging and maintaining the resonant device.

[0043] In this embodiment, the structure of the complementary split ring is adjusted based on the optimal coupling parameter to obtain a complementary split ring resonant device, including the following steps: Adjusting the basic opening widths of the first split ring and the second split ring in the complementary split rings based on the optimal opening width; Two microstrip lines with corresponding parameters are selected based on the optimal microstrip line parameters, and a complementary split ring is respectively connected to the input end and the output end of the two microstrip lines to obtain a complementary split ring resonant device.

[0044] This embodiment can accurately control the resonant frequency and bandwidth of the resonant device by adjusting the basic opening width of the split ring in the complementary split ring to the optimal value, thereby ensuring that the resonant device has excellent performance within a specific frequency range, such as high Q value, low insertion loss, etc.; by selecting the optimal opening width, it helps to reduce the energy loss in the resonance process, thereby improving the efficiency of the resonant device. At the same time, by optimizing the parameters of the microstrip line, the transmission loss can be further reduced and the output power can be increased; by accurately adjusting the opening width of the split ring and selecting the optimal microstrip line parameters, it can be ensured that the resonant device has stable performance under different environmental conditions, thereby ensuring output stability.

[0045] In this embodiment, the optimal microstrip line parameters at least include the microstrip line width and the thickness of the microstrip line substrate.

[0046] In this embodiment, since the complementary split ring needs to be coupled with the microstrip line to achieve the resonance effect, the performance of the complementary split ring resonant device depends not only on the geometric parameters of the complementary split ring, but also on the parameters of the microstrip line. Therefore, in order to obtain a resonant device with the best performance that can meet the resonance requirements, the parameters of the microstrip line also need to be considered.

[0047] In this embodiment, a complementary split ring is formed by nesting the first split ring and the second split ring, and the basic geometric parameters are iterated based on the coupling parameter iteration principle to obtain the optimal coupling parameters, which can significantly improve the coupling effect inside the resonant device, thereby improving its overall performance and efficiency. By adjusting the structure of the complementary split ring to meet the optimal coupling parameters, the overall performance of the resonant device can be further improved, including improving the stability of the resonant frequency, enhancing the resonant efficiency, reducing energy loss, etc.; by forming a strong local electric field enhancement effect at the opening, the electromagnetic energy coupling in a specific direction is promoted, and by increasing the coupling points, the electric field distribution around the resonator can be changed to make the electric field more uniform or enhance the field strength in a specific area; by increasing the coupling points and the opening design, the flexibility of the electromagnetic coupling path can be improved, which is suitable for multi-band operation or complex electromagnetic environment; by introducing a non-uniform distribution of inductance and capacitance at the opening, the resonant frequency can be adjusted by the size, shape or position of the opening, so that it usually has a lower resonant frequency, which is suitable for miniaturized electromagnetic device design; by increasing the coupling points, more electromagnetic energy transmission paths are provided, thereby improving the overall energy coupling efficiency, and the multi-point coupling structure can reduce the local energy loss that may be caused by single-point coupling, and improve the transmission efficiency of the system.

[0048] Example 2: Figure 4 As shown, this embodiment provides a complementary split ring resonant device, including a complementary split ring and a microstrip line; The complementary split rings include a first split ring and a second split ring in a double ring nested structure; The upper or lower parts of the first split ring and the second split ring are provided with openings; The complementary split rings are coupled between two microstrip lines to form a coupling point.

[0049] This embodiment adopts a double-ring nested structure and microstrip line coupling to not only increase the coupling points, thereby improving the local field enhancement effect, but also, under the premise of increasing the coupling points, due to the double-ring nested structure, the energy leaked at the opening is limited, the energy leakage is reduced, the electric field distribution is made more uniform, the regularity of the field intensity distribution is improved, and the energy transmission efficiency during coupling is improved; and the coupling point is located at the upper part (or lower part) of the circular ring, which is equivalent to increasing the capacitance, so that the electric field energy of the microstrip ring is more concentrated, and the energy is ensured not to be attenuated at the microstrip ring, and the energy coupled to the output end of the microstrip line is improved.

[0050] In this embodiment, in the complementary split rings, the opening position of the first split ring and the opening position of the second split ring are symmetrically distributed with the microstrip line as the symmetry axis.

[0051] In this embodiment, since the first split ring and the second split ring need to be nested with each other to reduce energy leakage at the opening, in order to minimize energy leakage, the opening position of the first split ring and the opening position of the second split ring are symmetrically distributed with the microstrip line as the symmetry axis, which helps to reduce the slope of the electromagnetic energy, thereby increasing the coupling energy and improving the overall field strength.

[0052] In this embodiment, the second split ring is nested in the first split ring.

[0053] In this embodiment, since the first split ring needs to be nested with the second split ring to form a complementary split ring, and the radius of the second split ring is smaller than that of the first split ring, the second split ring is nested in the first split ring, which limits the energy leaked at the opening, reduces energy leakage, makes the electric field distribution more uniform, improves the regularity of the field strength distribution, and thus improves the energy transmission efficiency during coupling.

[0054] As a further supplement to this embodiment, the following scenario is used as an example to further illustrate this solution: the electromagnetic field distribution of the split ring is drawn using the HFSS simulation tool, and the influence of multi-point coupling on the field strength distribution is analyzed to ensure that the field strength is evenly distributed in the ring at the resonant frequency without excessively strong or weak areas. Figure 3 As shown in the figure, different colors represent the magnitude of the electric field strength, usually from cold colors (blue) to warm colors (red) to represent the distribution of electric field strength from low to high. The yellow and red areas represent the highest electric field strength, and the blue area has the weakest electric field.

[0055] like Figure 1 and Figure 6 As shown, the interaction between the field distribution around the circular ring resonant device and the input / output coupling position is demonstrated. The changes in the opening position and the field around it indicate that the electric field achieves energy coupling through the resonator. The field strength at the input end is 34210V / m, and the field strength at the output end is set to 7659V / m. The transmission efficiency of the existing circular ring structure resonant device is 14.93%. It is connected to two microstrip lines, and the coupling point is located between the circular ring and the two microstrip lines. When in a resonant state, the electric field is distributed on the circular ring, and there is obvious energy attenuation at the coupling point, thereby reducing the transmission efficiency of the resonant device.

[0056] like Figure 2 and Figure 7As shown in the figure, the transmission efficiency of the split ring resonant device with the same radius as the circular ring resonant device is 22.39%. An opening is designed on the basis of the circular ring structure, and a new coupling point is formed at the opening. When in the resonant state, the electric field is concentrated near the opening, and a strong local field enhancement effect is formed during resonance, which reduces energy attenuation to a certain extent and improves the transmission efficiency. However, the opening will cause partial energy leakage, so that its overall field strength may not be as good as that of the closed circular ring. Therefore, it is still difficult to completely solve the problem of low energy transmission efficiency in the resonant state.

[0057] like Figure 4 and Figure 8 As shown, the transmission efficiency of the complementary split ring resonant device with the same radius as the circular ring resonant device is 25.85%, which is higher than that of the circular ring resonant device and the split ring resonant device, and two coupling points are added. The increase of coupling points can significantly improve the transmission efficiency of the resonator. The electromagnetic field is more evenly distributed on the complementary split ring, and the electric field in the ring decreases in a ring shape, and the field strength distribution has a strong regularity. Due to the enhancement of the coupling effect, the slope of the electromagnetic energy is reduced, the coupling energy is increased, and the overall field strength is better than that of the closed ring.

[0058] It can be seen from the above embodiments that at least the following substantial effects are achieved: (1) The present invention forms a complementary split ring by nesting the first split ring and the second split ring, and iterates the basic geometric parameters based on the coupling parameter iteration principle to obtain the optimal coupling parameters, which can significantly improve the coupling effect inside the resonant device, thereby improving its overall performance and efficiency. By adjusting the structure of the complementary split ring to meet the optimal coupling parameters, the overall performance of the resonant device can be further improved, including improving the stability of the resonant frequency, enhancing the resonant efficiency, reducing energy loss, etc.; (2) The present invention promotes electromagnetic energy coupling in a specific direction by forming a strong local electric field enhancement effect at the opening. By increasing the coupling points, the electric field distribution around the resonator can be changed to make the electric field more uniform or enhance the field strength in a specific area. By increasing the coupling points and the opening design, the flexibility of the electromagnetic coupling path can be improved, which is suitable for multi-band operation or complex electromagnetic environment. (3) The present invention introduces a non-uniform distribution of inductance and capacitance into the opening, so that the resonant frequency can be adjusted by the size, shape or position of the opening, so that it usually has a lower resonant frequency and is suitable for the design of miniaturized electromagnetic devices; (4) The present invention increases the number of electromagnetic energy transmission paths by increasing the coupling points, thereby improving the overall energy coupling efficiency. The multi-point coupling structure can reduce the local energy loss that may be caused by single-point coupling and improve the transmission efficiency of the system.

[0059] The specific implementation described above is a preferred implementation of a complementary split ring resonant device and design method of the present invention, and is not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation. All equivalent changes made in accordance with the shape and structure of the present invention are within the protection scope of the present invention.

Claims

1. A complementary split ring resonator device design method, characterized in that: The following steps are involved: S1. Determine the main resonant frequency of the complementary split ring resonator device based on the resonance requirement; S2. The resonant coupling principle determines the basic geometric parameters of the complementary split ring resonator device in response to the main resonant frequency; S3, adjusting the geometric structure of the initial resonant device based on basic geometric parameters to obtain a first split ring and a second split ring; S4, nesting the first split ring and the second split ring to obtain a complementary split ring; Based on the coupling parameter iteration principle, the basic geometric parameters of the complementary split ring are iterated to obtain the optimal coupling parameters, and based on the optimal coupling parameters, the structure of the complementary split ring is adjusted to obtain a complementary split ring resonant device.

2. The method for designing a complementary split ring resonant device according to claim 1, characterized in that: In S2, the resonant coupling principle determines the basic geometric parameters of the complementary split ring resonator device in response to the main resonant frequency, including the following steps: Determine the estimated inductance and estimated capacitance of the complementary split ring resonant device based on the main resonant frequency and the resonant frequency calculation formula; Based on the estimated inductance, a basic opening angle and a basic opening width of the complementary split ring resonant device are obtained; based on the estimated capacitance, a basic ring radius and a basic ring number of the complementary split ring resonant device are obtained; The basic opening angle, basic opening width, basic ring radius and basic ring quantity of the complementary split ring resonator device serve as basic geometric parameters of the complementary split ring resonator device.

3. The method for designing a complementary split ring resonant device according to claim 1, characterized in that: In S3, adjusting the geometric structure of the initial resonant device based on the basic geometric parameters to obtain a first split ring and a second split ring includes the following steps: The shape of the initial resonance device is adjusted to a circle to obtain a basic ring, and the number of the basic rings is set to two to obtain a first basic ring and a second basic ring; An opening is designed on the upper part or the lower part of the first base ring to obtain a first split ring; an opening is designed on the upper part or the lower part of the second base ring to obtain a second split ring.

4. The method for designing a complementary split ring resonant device according to claim 3, characterized in that: The radius of the first base ring is greater than the radius of the second base ring.

5. The method for designing a complementary split ring resonant device according to claim 1, characterized in that: In S4, based on the coupling parameter iteration principle, the basic geometric parameters of the complementary split rings are iterated to obtain the optimal coupling parameters, including the following steps: The gap between the first split ring and the second split ring in the complementary split ring is detected to obtain an initial coupling gap, the initial coupling gap between the first split ring and the second split ring is kept unchanged, the opening widths of the first split ring and the second split ring are increased in sequence based on a set step size, and the insertion loss of the complementary split ring is detected synchronously, and the opening width corresponding to the minimum insertion loss is taken as the optimal opening width; The coupling impedance is determined based on the resonance requirement, and the optimal microstrip line parameters are determined based on the coupling impedance and the optimal opening width; the microstrip line parameters and the optimal opening width are used as the optimal coupling parameters.

6. A complementary split ring resonant device design method according to claim 5, characterized in that: In S4, the structure of the complementary split ring is adjusted based on the optimal coupling parameter to obtain a complementary split ring resonant device, including the following steps: Adjusting the basic opening widths of the first split ring and the second split ring in the complementary split rings based on the optimal opening width; Two microstrip lines with corresponding parameters are selected based on the optimal microstrip line parameters, and a complementary split ring is respectively connected to the input end and the output end of the two microstrip lines to obtain a complementary split ring resonant device.

7. The method for designing a complementary split ring resonator device according to claim 5, characterized in that: The optimal microstrip line parameters at least include the microstrip line width and the thickness of the microstrip line substrate.

8. A complementary split ring resonator device, applicable to the complementary split ring resonator device design method according to any one of claims 1 to 7, characterized in that: Includes complementary split rings and microstrip lines; The complementary split rings include a first split ring and a second split ring in a double ring nested structure; The upper or lower parts of the first split ring and the second split ring are provided with openings; The complementary split rings are coupled between two microstrip lines to form a coupling point.

9. A complementary split ring resonator device according to claim 8, characterized in that: In the complementary split rings, the opening position of the first split ring and the opening position of the second split ring are symmetrically distributed with the microstrip line as the symmetry axis.

10. The complementary split ring resonator device according to claim 8, characterized in that: The second split ring is nested within the first split ring.

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