Performance evaluation apparatus and method for mesh type antenna apparatus for mounting satellite

Abstract

The present invention relates to an apparatus and method for evaluating the performance of a mesh-type antenna device for satellite mounting based on a model angle for analyzing and predicting the electrical performance of a complex mesh. A performance evaluation device for a mesh-type antenna device for satellite mounting according to an embodiment of the present invention comprises: a modeling unit that determines a model unit using a sample mesh and models a model shape; a parameter measurement unit that measures parameters of the model shape from an image captured by magnifying a metal mesh used as the sample mesh; a simulation unit that generates a wire grid mesh model using the parameters and simulates a trend of electrical performance change based on a change in the model angle () through a periodic reflectance calculated using electromagnetic analysis software; and a result output unit that outputs a trend of electrical performance change according to different model angles () based on the trend of electrical performance change of the mesh simulated in the simulation unit.

Description

Technology Field

[0001] The present invention relates to an apparatus and method for evaluating the performance of a mesh-type antenna device for satellite mounting, and more specifically, to an apparatus and method for evaluating the performance of a mesh-type antenna device for satellite mounting based on a model angle for analyzing and predicting the electrical performance of a complex mesh. Background Technology

[0003] Large antenna devices featuring mesh-type reflectors are lighter and possess high-gain characteristics compared to conventional antenna devices with non-mesh reflectors. For this reason, mesh-type antenna devices continue to attract attention as lightweight, high-gain antennas for satellite deployment. In particular, configuring the antenna's reflective surface with a metal mesh instead of a solid surface offers the advantage of significantly reducing mass.

[0004] Therefore, the latest technology constructs mesh models based on the periodic knitting patterns of metal meshes, and in particular, there are various approaches to constructing mesh models of metal meshes with diverse knitting patterns, such as the wire-grid model, strip-aperture model, and surface-patch model.

[0005] However, the wire grid model applies Astrakhan's formula to calculate the reflection and transmission coefficients of the mesh, but Astrakhan's formula is applicable only to square or rectangular meshes. Furthermore, the strip-opening model constructs a single mesh cell using two grids and six variables, and the surface patch model replaces cylindrical wides with equivalent strips; thus, both the strip-opening model and the surface patch model must consider many design variables.

[0006] As such, while existing modeling approaches can construct models of complex meshes, they are limited to meshes woven with a single wire and utilize fixed variables in mesh modeling. However, since current meshes are elastic and fluid, the mesh variables vary depending on the tension of the supporting structure. Furthermore, unlike solid surface reflectors, mesh reflectors have numerous openings, necessitating an analysis of the mesh's electrical performance.

[0007] Therefore, it is necessary to develop a new method for constructing a mesh model to analyze the electrical performance of elastic meshes woven with multiple wires and complex knitting patterns. Prior art literature

[0009] (Patent Document 0001) KR 10-2673504 B1 (Registered June 4, 2024) The problem to be solved

[0010] The present invention aims to provide an apparatus and method for evaluating the performance of a mesh-type antenna device for satellite mounting based on model angles for analyzing and predicting the electrical performance of a complex mesh.

[0011] The present invention aims to provide an apparatus and method for evaluating the performance of a mesh-type antenna device for satellite mounting by solving the problem of constructing a mesh model of a multi-wire knitted mesh woven with a complex pattern, by modifying the shape of the mesh model and observing the trend of change in the electrical performance of the mesh, and thereby predicting the range of change in the electrical characteristics of the metal mesh. means of solving the problem

[0013] A performance evaluation device for a mesh-type antenna device for satellite mounting according to an embodiment of the present invention comprises: a modeling unit that determines a model unit using a sample mesh and models a model shape; a parameter measurement unit that measures parameters of the model shape from an image captured by magnifying a metal mesh used as the sample mesh; and a wire grid mesh model that generates a model angle (through a periodic reflectance calculated using electromagnetic analysis software) A simulation unit that simulates the trend of electrical performance change based on the change of ); and, based on the trend of electrical performance change of the mesh simulated in the simulation unit, different model angles ( It includes a result output unit that outputs the trend of electrical performance change according to ).

[0014] The above parameters are width (w), length (l), diagonal length (a), model angle ( ) and includes the wire diameter (d).

[0015] The above wire diameter (d) is one or more thread diameters ( Includes ).

[0016] The simulation unit above comprises a mesh model constructor that generates a wire grid mesh model using electromagnetic analysis software based on the above parameters; and the thread diameter ( A mesh model setting unit that calculates the size of a wide grid mesh model by setting a wide diameter (d) obtained by multiplying ) by an equivalent coefficient n in the wire grid mesh model; a reflection coefficient calculation unit that calculates the reflection coefficient of the wide grid mesh model by extracting periodic units of the equivalent coefficient n at predetermined intervals; a comparison unit that compares the reflectance according to the reflection coefficient with the reflectance of a sample mesh that has been pre-measured and stored for the corresponding mesh sample, and confirms the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh; and the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh confirmed by the comparison unit is the thread diameter ( The wire diameter (d) of the wire grid mesh model is set by multiplying by the value of ), and the model angle ( It includes a mesh model determination unit that observes the trend of electrical performance change based on the change of ).

[0017] The above n is the measured thread diameter ( It is characterized as an equivalent coefficient for converting ) into the wire diameter of the model.

[0018] The reflection coefficient calculation unit sets the equivalent coefficient n from 1 to m (where m is a number greater than 1 (e.g., an integer)), and the predetermined interval of the equivalent coefficient n is It is characterized by being a gap.

[0019] The above reflection coefficient calculation unit is a model angle ( Based on ), the length (l), width (w), and wide diameter (d) are defined as in the following Equation 1 to model a wide grid mesh model and calculate the reflection coefficient using electromagnetic analysis software.

[0020] [Formula 1]

[0021]

[0022]

[0023]

[0024] The above change in electrical performance utilizes the range of change in electrical characteristics using the transmittance of the mesh.

[0025] A method for evaluating the performance of a mesh-type antenna device for satellite mounting according to an embodiment of the present invention comprises: a process in a modeling unit of determining a model unit using a sample mesh and modeling a model shape; a process in a parameter measurement unit of measuring parameters of the model shape from an image captured by magnifying a metal mesh used as a sample mesh; and a process in a simulation unit of generating a wire grid mesh model using the parameters and model angles ( A process of simulating the trend of electrical performance change based on the change of ); and in the result output unit, based on the trend of electrical performance change of the simulated mesh, different model angles ( It includes a process for outputting the trend of electrical performance change according to ).

[0026] The process of outputting the above electrical performance change trend is the model angle of the mesh pattern that changes according to the difference in tension distribution between the force applied to the mesh material and the reflector support structure ( Calculate ) to predict the change in electrical performance of the mesh material.

[0027] The process of simulating the above electrical performance change trend comprises: (A) a process of generating a wire grid mesh model using electromagnetic analysis software based on the above parameters in the mesh model configuration unit; (B) a process of generating the above measured thread diameter ( (C) A process of calculating the size of a wide grid mesh model by setting a wide diameter (d) obtained by multiplying ) by an equivalent coefficient n in the wire grid mesh model; (D) A process in a reflection coefficient calculation unit of calculating the reflection coefficient of the wide grid mesh model by extracting periodic units of the equivalent coefficient n at predetermined intervals; (E) A process in a comparison unit of comparing the reflectance according to the reflection coefficient with the reflectance of a sample mesh that has been pre-measured and stored for the corresponding mesh sample, and confirming the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh; (E) When, as a result of the comparison, the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh is confirmed, in a mesh model determination unit, the value of the equivalent coefficient n that matches the confirmed reflectance of the measured sample mesh is the thread diameter ( A process of setting the wire diameter (d) of a wire grid mesh model by multiplying it by ); and (F) using the wire grid mesh model with the wire diameter (d) set to the model angle ( It includes a process of observing trends in electrical performance changes based on changes in ).

[0028] If, as a result of comparison in process (E) above, the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh (31) is not confirmed, the process of finding two close match results and the corresponding value of n, and reducing the interval of the equivalent coefficient (n) further than the existing interval; and the process of repeating process (B) to process (D) above.

[0029] The process of finding the above equivalent coefficient (n) is based on the desired result accuracy, with intervals ( Reduce ) and repeat the above (B) process ~ above (D) process.

[0030] The above model angle ( ) is characterized by having different values ​​in response to shape changes when the mesh is tensioned with different forces.

[0031] In the result output section, the model angle ( It further includes a process of analyzing the performance of a mesh-type antenna device by predicting ). Effects of the invention

[0033] According to an embodiment of the present invention, a solution for constructing a mesh model for analyzing the electrical properties of a mesh with a complex knitting pattern can be provided.

[0034] In addition, it is applicable to both single-wire woven meshes and multi-wire woven meshes, and by using model angles to predict the range of performance variation due to differences in tension distribution of the reflector support structure, the final performance of a mesh-type antenna for satellite mounting can be evaluated and predicted. Brief explanation of the drawing

[0036] FIG. 1 is a conceptual diagram illustrating a structural model of a mesh-type antenna device for satellite mounting according to an embodiment of the present invention. FIG. 2 is a diagram showing the model units and variables of the model unit required to build a mesh model using the metal mesh of FIG. 1. FIG. 3 is a diagram showing the configuration of a performance evaluation device for a mesh-type antenna device for satellite mounting according to an embodiment of the present invention. Figure 4 is a detailed diagram showing the configuration of the simulation unit of Figure 3. FIG. 5a is a drawing showing an enlarged image of the application of the mesh sample and model unit in FIG. 3. FIG. 5b is a diagram showing the model geometry of the mesh sample in FIG. 3 and the parameters required to build the mesh model. Fig. 5c is a drawing showing the final prototype model for the mesh sample of the electromagnetic analysis software in Fig. 3. FIG. 6 is a flowchart illustrating a method for evaluating the performance of a mesh-type antenna device for satellite mounting according to an embodiment of the present invention. FIG. 7 is a flowchart detailing the process for modeling the mesh model in FIG. 6. Figure 8 is a graph showing the comparison of the reflectance measured for TE polarization and the CST simulation results in the comparison section of Figure 3. FIG. 9 is a diagram showing the trend of reflectance change according to various model angles (α) output from the result output section of FIG. 3. Specific details for implementing the invention

[0037] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms, and the embodiments of the present invention are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. To explain the invention in detail, the drawings may be exaggerated, and like reference numerals in the drawings refer to like elements.

[0038] FIG. 1 is a conceptual diagram illustrating a structural model of a mesh-type antenna device for satellite mounting according to an embodiment of the present invention, and FIG. 2 is a diagram showing the model unit and variables of a model unit required to construct a mesh model using the metal mesh of FIG. 1.

[0039] Referring to FIG. 1, the mesh type antenna (10) according to the present invention includes a reflector (20) and a support structure (40). The mesh type antenna (10) must include a feed assembly (not shown), but the feed location is not shown separately in FIG. 1 because it varies depending on the type of reflector antenna. At this time, the mesh type antenna (10) is applicable to both single-wire woven mesh and multi-wire woven mesh.

[0040] The support structure (40) is designed to form a specific shape of the reflector (20) that forms a three-dimensional surface such as a parabola and a cylinder. A metal mesh (30) woven in a specific pattern is attached to the support structure (40).

[0041] Meanwhile, the model units and parameters required to construct the mesh model are, as shown in FIG. 2, the width w, length l, diagonal length a, and model angle alpha in the mesh sample ( There are a total of 4 types.

[0042] Compared to the width (w) and length (l), the diagonal length (a) has the minimum difference when the shape of the mesh pattern changes with different tensions. Therefore, two parameters, width (w) and length (l), are required to construct a model unit. That is, when constructing a model unit, the first two parameters, width (w) and length (l), can be measured from a mesh sample and then calculated. The model angle combined with the diagonal length (a) Shape changes at the model level can be described by formula using ).

[0043] FIG. 3 is a diagram showing the configuration of a performance evaluation device for a satellite-mounted mesh-type antenna device according to an embodiment of the present invention, and FIG. 4 is a diagram showing the configuration of the simulation unit of FIG. 3 in detail. FIG. 5a is an enlarged photograph showing the application of the mesh sample and model unit in FIG. 3, FIG. 5b is a diagram showing the model shape of the mesh sample and the parameters required for constructing the mesh model in FIG. 3, and FIG. 5c is a diagram showing the final prototype model for the mesh sample of the electromagnetic analysis software in FIG. 3.

[0044] First, referring to FIG. 3, a performance evaluation device for a mesh-type antenna device for satellite mounting according to an embodiment of the present invention includes a modeling unit (100), a parameter measurement unit (200), a simulation unit (300), and a result output unit (400).

[0045] As illustrated in FIG. 5a, the modeling unit (100) determines the model unit (32) of the sample mesh (31) using one of the sample meshes (31) that are stored in advance, and models the model shape (33) of the mesh. The model unit (32) has a diagonal length (a) and a model angle ( It consists of a rectangular frame having the length (l) and width (w) required to calculate ). The model shape (33) may be a shape representing the shape of the mesh by deriving the repeating shape of the cell from the sample mesh (31), as shown in FIG. 5B. The model shape (33) may be constructed by twisting a plurality of gold-coated molybdenum wires into a single thread and weaving them into a metal mesh with a circular knitting pattern.

[0046] The parameter measuring unit (200), as illustrated in FIG. 5a, obtains the width (w), length (l), and thread diameter ( of the model shape (33) determined by the modeling unit (100) from a photograph taken by enlarging the metal mesh (31) used as a sample mesh. Measure parameters including ), diagonal length (a), model angle ( ) and the wire diameter (d) is calculated using the measured parameters and the mathematical formula 1. The parameters may be variables required to construct the model shape (33). The wire diameter (d) is one or more thread diameters ( It may include ).

[0047] At this time, compared to the width (w) and length (l) among the parameters, the diagonal length (a) has the minimum difference when the shape of the mesh pattern changes to a different tension. Therefore, to construct the model shape (33), two parameters of width (w) and length (l) are required. That is, when the parameter measuring unit (200) constructs the unit of the model shape (33), it measures the first two parameters, width (w) and length (l), from the mesh sample (31), and then the diagonal length (a) and model angle ( ) can be calculated. Model angle combined with diagonal length (a) ) can describe the shape change of the model shape (33) using a formula.

[0048] The simulation unit (300) generates a wire grid mesh model (34) as illustrated in FIG. 5c using parameters measured by the parameter measurement unit (200), and the model angle ( The trend of electrical performance change is simulated based on the change of ). The wire grid mesh model (34) is the width (w), length (l), diagonal length (a), and model angle ( of the model shape (33) measured by the parameter measuring unit (200). ) and thread diameter( It is generated by ).

[0049] Referring together with FIG. 4, the simulation unit (300) includes a mesh model configuration unit (310), a mesh model setting unit (320), a reflection coefficient calculation unit (330), a comparison unit (340), and a mesh model determination unit (350).

[0050] The mesh model constructor (310) generates a wire grid mesh model (34) using electromagnetic analysis software such as CST (Computer Simulation Technology) and HFSS (High-Frequency Structure Simulator) based on parameters measured by the parameter measurement unit (200). The wire grid mesh model (34) is formed by the width (w), length (l), diagonal length (a), and model angle ( ) and thread diameter( It can be generated by ).

[0051] The mesh model setting unit (320) measures the thread diameter ( The size of the wide grid mesh model (34) is calculated by setting the wide diameter (d), which is obtained by multiplying the equivalence coefficient n, to the wire grid mesh model (34).

[0052] At this time, n is the measured thread diameter ( ) is an equivalent coefficient for converting into the wire diameter of the model. That is, the wide grid mesh model (34) is generated with a single wire as shown in FIG. 5c, but as the metal mesh (31) used as the sample mesh as shown in FIG. 5a is composed of multiple strands of wire, to compensate for this, the mesh model setting unit (320) measures the measured thread diameter ( The wire diameter (d) is set by multiplying the value by the equivalent coefficient n.

[0053] The reflection coefficient calculation unit (330) calculates the reflection coefficient of the wide grid mesh model (34) by extracting periodic units of the equivalent coefficient n at predetermined intervals. The equivalent coefficient n can be set from 1 to m, where m is a number greater than 1, preferably 3, and the predetermined interval of n is, for example, It can be a gap. In this case, the reflection coefficient can be calculated using electromagnetic analysis software such as CST, HFSS, etc.

[0054] The reflection coefficient calculation unit (330) is the model angle ( Based on ), the length (l), width (w), and wide diameter (d) can be expressed as in the following mathematical formula 1, and by applying mathematical formula 1 to electromagnetic analysis software such as CST, HFSS, etc., the reflection coefficient of the wide grid mesh model (34) can be calculated.

[0055]

[0056]

[0057]

[0058] The comparison unit (340) compares the reflectance based on the reflectance calculated by the reflection coefficient calculation unit (330) with the reflectance of the sample mesh (31) that has been measured and stored in advance for the corresponding mesh sample, and checks the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh (31).

[0059] Figure 8 is a graph showing the comparison of the reflectance measured for TE polarization and the CST simulation results in the comparison section of Figure 3.

[0060] Referring to FIG. 8, for the incident plane, TE (Transverse Electric) is the vertical polarization of the electric field. The large dashed line is the reflectance of the measured sample mesh (31), and the small dashed line is the trend line of the measured reflectance. Since the reflectance of the measured sample mesh (31) shows a fluctuating decreasing trend, the trend line calculated using the least squares method is used to compare with the simulation results in the simulation unit (300).

[0061] As shown in Fig. 8, the simulation result (n=1.17) shows good agreement with the trend line of the measured reflectance. The result indicates a reflectance difference of less than 0.001 dB between two adjacent results (if the accuracy requirement is within 0.01 dB, n=1.2( =0.1) is sufficient as a result).

[0062] The mesh model determination unit (350) determines the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh (31) confirmed in the comparison unit (340) and the thread diameter ( The wire diameter (d) of the wire grid mesh model (34) is set by the value multiplied by ). Then, the mesh model determining unit (350) uses the wire grid mesh model (34) with the wire diameter (d) set to determine the model angle ( Observe the trend of electrical performance change of the wire grid mesh model (34) based on the change of ).

[0063] In this way, the mesh model determination unit (350) can predict changes in electrical performance once the wire grid mesh model (34) is established. And the model angle ( ) has different values ​​in response to shape changes when the mesh is stretched with different forces, and these model angles ( By using ) to predict the range of performance variation according to the difference in tension distribution of the reflector support structure (40), the final performance of the mesh-type antenna for satellite mounting can be evaluated and predicted.

[0064] Meanwhile, the simulation unit (300) is not limited to observing the reflectance of the mesh, but can also observe the range of change of other electrical characteristics such as transmittance.

[0065] The result output unit (400) is based on the electrical performance change trend of the mesh simulated in the simulation unit (300), and various model angles ( Outputs the trend of change in reflectance performance, which is one of the electrical characteristics according to ).

[0066] FIG. 9 shows various model angles output from the result output unit of FIG. 3 ( This is a diagram showing the trend of reflectance change according to ).

[0067] Referring to Fig. 9, for the incident plane, TE (Transverse Electric) and TM (Transverse Magnetic) in the figure represent the perpendicular and parallel polarization of the electric field. As intuitively illustrated in Fig. 9, the reflectivity is the model angle ( It changes as ) changes. Model angle( ) has different values ​​corresponding to shape changes when the mesh is stretched with different forces, and the range of reflectance change is the model angle( ) It is within approximately 0.06dB at 90 to 120 degrees, and the mesh is at a specific model angle( It can be confirmed that it exhibits isotropy in ).

[0068] Thus, the model angle output from the result output unit (400) By using ) to measure the force applied to the mesh and predicting the range of performance variation according to the difference in tension distribution of the reflector support structure, the final performance of the mesh-type antenna device for satellite mounting can be evaluated and predicted.

[0069] Hereinafter, a method for evaluating the performance of a mesh-type antenna device for satellite mounting according to an embodiment of the present invention will be described. The method for evaluating the performance of a mesh-type antenna device for satellite mounting according to an embodiment of the present invention may be a method for processing a received signal using the aforementioned performance evaluation device for a mesh-type antenna device for satellite mounting. Since the aforementioned details regarding the performance evaluation device for a mesh-type antenna device for satellite mounting can be applied as is, the description of redundant details may be omitted.

[0070] FIG. 6 is a flowchart illustrating a method for evaluating the performance of a mesh-type antenna device for satellite mounting according to an embodiment of the present invention.

[0071] Referring to FIG. 6, a method for evaluating the performance of a mesh-type antenna device for satellite mounting according to an embodiment of the present invention, in a modeling unit (100), determines a model unit (32) of a sample mesh (31) using one of the sample meshes (31) that are stored in advance, and models the model shape (33) of the mesh (31) (S100). The model unit (32) is formed by the diagonal length (a) and the model angle ( It consists of a rectangular frame having the length (l) and width (w) required to calculate ). The model shape (33) may be a shape representing the shape of the mesh by deriving the repeating shape of the cell from the sample mesh (31). The model shape (33) may be a simplified shape of a mesh composed of one or more metal wires, such as gold-coated molybdenum or tungsten, woven together.

[0072] And in the parameter measuring unit (200), from a photograph taken by enlarging the metal mesh (31) used as a sample mesh, the width (w), length (l), and thread diameter of the model shape (33) determined in the modeling unit (100) Parameters including ) are measured (S200). Then, from the three measured parameters, the diagonal length (a), model angle ( Then, calculate the wire diameter (d) using mathematical formula 1.

[0073] Next, in the simulation unit (300), a wire grid mesh model (34) is generated using parameters measured in the parameter measurement unit (200), and the model angle ( The trend of electrical performance change is simulated based on the change of ) (S300). The wire grid mesh model (34) is the width (w), length (l), diagonal length (a), and model angle ( of the model shape (33) measured by the parameter measuring unit (200). ) and thread diameter( It is generated by ).

[0074] At this time, the simulation unit (300) is not limited to observing the reflectance of the mesh, but can also observe the range of change of other electrical characteristics such as transmittance.

[0075] And in the result output unit (400), based on the trend of electrical performance change of the mesh simulated in the simulation unit (300), various model angles ( Outputs the trend of change in reflectance performance, which is one of the electrical characteristics according to ) (S400). From the mesh pattern that changes according to the difference in tension distribution between the force applied to the mesh and the reflector support structure in the result output unit (400), the model angle ( By calculating ), the final performance of a mesh-type antenna device for satellite mounting can be evaluated and predicted.

[0076] Figure 7 is a flowchart that details the process for modeling the mesh model in Figure 6.

[0077] With reference to FIG. 7, the process (S300) of simulating the trend of electrical performance change of a wire grid mesh model involves generating a wire grid mesh model (34) using electromagnetic analysis software such as CST or HFSS based on parameters measured by the parameter measurement unit (200) in the mesh model configuration unit (310) (S310). At this time, the wire grid mesh model (34) is formed by the width (w), length (l), and thread diameter (d) of the model shape (33) measured by the parameter measurement unit (200), the diagonal length (a) calculated by Equation 1, and the model angle ( It can be generated by ).

[0078] And in the mesh model setting section (320), the measured thread diameter ( The size of the wide grid mesh model (34) is calculated by setting the wide diameter (d), which is obtained by multiplying the equivalence coefficient n, to the wire grid mesh model (34) (S320).

[0079] At this time, n is the measured thread diameter ( ) is an equivalent coefficient for converting into the wire diameter of the model. That is, the wide grid mesh model (34) is generated with a single wire, but the metal mesh (31) used as the sample mesh consists of multiple strands (about 3 strands) of wire, so to compensate for this, the mesh model setting unit (320) measures the measured thread diameter ( The wire diameter (d) is set by multiplying the value by the equivalent coefficient n.

[0080] Next, in the reflection coefficient calculation unit (330), the reflection coefficient of the wide grid mesh model (34) is calculated by extracting periodic units of the equivalent coefficient n at predetermined intervals (S330). The equivalent coefficient n can be set from 1 to m, where m is a number greater than 1, preferably 3, and the predetermined interval of n is, for example, It can be a gap. In this case, the reflection coefficient can be calculated using electromagnetic analysis software such as CST, HFSS, etc.

[0081] Meanwhile, length (l), width (w), and thread diameter ( Model angle based on ) The wire diameter (d) and the ) can be expressed as in the above mathematical formula 1, and by applying mathematical formula 1 to electromagnetic analysis software such as CST, HFSS, etc., the reflection coefficient of the wide grid mesh model (34) can be calculated.

[0082] Then, in the comparison unit (340), the reflectance according to the reflectance coefficient calculated in the reflection coefficient calculation unit (330) and the reflectance of the sample mesh (31) that has been measured and stored in advance for the corresponding mesh sample are compared with each other to determine the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh (31) (S340).

[0083] When the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh (31) is confirmed in the above comparison result (S340), the mesh model determination unit (350) determines the value of the equivalent coefficient n that matches the confirmed reflectance of the measured sample mesh (31) and the thread diameter ( The wire diameter (d) of the wire grid mesh model (34) is set by multiplying it by the value (S350). Then, using the wire grid mesh model (34) with the wire diameter (d) set, the model angle ( Observe the trend of electrical performance change of the wire grid mesh model (34) based on the change of ).

[0084] If, as a result of the comparison above (S340), the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh (31) is not confirmed, two close match results and the corresponding value of n are found, the interval of the equivalent coefficient (n) is reduced further than the existing interval, and the process from S320 to S340 is repeated (S360).

[0085] At this time, the interval of the equivalent coefficient (n) is the existing interval ( A spacing that is smaller than the spacing) Set to = 0.1 interval). In addition, if a matching value of the equivalence coefficient n is not confirmed even by repeating the above S320 ~ S340 processes, the existing interval ( A spacing reduced further than = 0.1 interval ( Reset to an interval of 0.01, and repeat the above S320 ~ S340 processes. This iteration process can be repeated until a matching result is found, and the number of iterations can be determined according to the required result accuracy.

[0087] In the foregoing, preferred embodiments of the present invention have been described and illustrated using specific terms, but such terms are intended solely to clarify the present invention, and it is obvious that various modifications and changes may be made to the embodiments and described terms of the present invention without departing from the technical spirit and scope of the following claims. Such modified embodiments should not be understood separately from the spirit and scope of the present invention, but should be considered to fall within the scope of the claims of the present invention. Explanation of the symbols

[0089] 10: Mesh reflector antenna 20: Reflector 30: Metal mesh 31: Sample mesh 32: Model Unit 33: Model Shape 34: Wide grid mesh model 40: Support structure 100: Modeling Section 200: Parameter Measurement Section 300: Simulation Section 310: Mesh Model Configuration Section 320: Mesh Model Configuration Section 330: Reflection Coefficient Calculation Section 340: Comparison Section 350: Mesh Model Determination Section 400: Result output section

Claims

Claim 1 A modeling unit that determines a model unit using a sample mesh and models a model shape; a parameter measuring unit that measures parameters of the model shape from an image captured by magnifying the metal mesh used as the sample mesh; and a wire grid mesh model that generates a model angle ( A simulation unit that simulates the trend of electrical performance change based on the change of ); and based on the trend of electrical performance change of the mesh simulated in the simulation unit, different model angles ( It includes a result output unit that outputs a trend of electrical performance change according to ), and the parameters are width (w), length (l), diagonal length (a), model angle ( A performance evaluation device for a mesh-type antenna device including ) and wire diameter (d). Claim 2 delete Claim 3 In claim 1, the wire diameter (d) is one or more thread diameters ( A performance evaluation device for a mesh-type antenna device including ). Claim 4 In claim 3, the simulation unit comprises: a mesh model constructor that generates a wire grid mesh model using electromagnetic analysis software based on the parameters; and the thread diameter ( A mesh model setting unit that calculates the size of a wide grid mesh model by setting a wide diameter (d) obtained by multiplying ) by an equivalent coefficient n in the wire grid mesh model; a reflection coefficient calculation unit that calculates the reflection coefficient of the wide grid mesh model by extracting periodic units of the equivalent coefficient n at predetermined intervals; a comparison unit that compares the reflectance according to the reflection coefficient with the reflectance of a sample mesh that has been pre-measured and stored for the corresponding mesh sample, and confirms the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh; and the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh confirmed by the comparison unit is the thread diameter ( The wire diameter (d) of the wire grid mesh model is set by multiplying by the value of ), and the model angle ( A performance evaluation device for a mesh-type antenna device comprising a mesh model determination unit that observes the trend of electrical performance change based on the change of ). Claim 5 In claim 4, the above n is the measured thread diameter ( A performance evaluation device for a mesh-type antenna device characterized by being an equivalent coefficient for converting ) into the wire diameter (d) of a model. Claim 6 In claim 4, the reflection coefficient calculation unit sets the equivalent coefficient n from 1 to m (m is an integer greater than 1), and the predetermined interval of the equivalent coefficient n is Performance evaluation device for a mesh-type antenna device characterized by spacing. Claim 7 In claim 4, the reflection coefficient calculation unit is a model angle ( A performance evaluation device for a mesh-type antenna device that models a wide grid mesh model and calculates reflection coefficients using electromagnetic analysis software by defining the length (l), width (w), and wide diameter (d) based on ) as shown in the following Equation 1. [Equation 1] Claim 8 In claim 4, the electrical performance change is a performance evaluation device for a mesh-type antenna device that utilizes a range of changes in electrical characteristics using the transmittance of the mesh. Claim 9 In the modeling unit, a process of determining a model unit using a sample mesh and modeling a model shape; in the parameter measurement unit, a process of measuring the parameters of the model shape from an image captured by magnifying the metal mesh used as the sample mesh; in the simulation unit, a wire grid mesh model is generated using the parameters, and the model angle ( A process of simulating the trend of electrical performance change based on the change of ); and in the result output unit, based on the trend of electrical performance change of the simulated mesh, different model angles ( It includes a process for outputting a trend of electrical performance change according to ), and the parameters are width (w), length (l), diagonal length (a), model angle ( A method for evaluating the performance of a mesh-type antenna device including ) and wire diameter (d). Claim 10 In claim 9, the process of outputting the electrical performance change trend comprises a model angle of a mesh pattern that changes according to the difference in tension distribution between the force applied to the mesh material and the reflector support structure ( A method for evaluating the performance of a mesh-type antenna device by calculating ) to predict changes in the electrical performance of the mesh material. Claim 11 In claim 10, the electrical performance change is a method for evaluating the performance of a mesh-type antenna device using a range of electrical characteristics using the transmittance of the mesh. Claim 12 In claim 9, the process of simulating the electrical performance change trend comprises: (A) a process of generating a wire grid mesh model using electromagnetic analysis software based on the parameters in the mesh model configuration unit; (B) a process of measuring the thread diameter ( A process of calculating the size of a wide grid mesh model by setting a wide diameter (d) obtained by multiplying ) by an equivalent coefficient n in the wire grid mesh model; (C) a process in which, in the reflection coefficient calculation unit, the reflection coefficient of the wide grid mesh model is calculated by extracting periodic units of the equivalent coefficient n at predetermined intervals; (D) a process in which, in the comparison unit, the reflectance according to the reflection coefficient is compared with the reflectance of a sample mesh that has been pre-measured and stored for the corresponding mesh sample, and a process of confirming the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh; (E) if, as a result of the comparison, the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh is confirmed, in the mesh model determination unit, the value of the equivalent coefficient n that matches the confirmed reflectance of the measured sample mesh is the thread diameter ( A process of setting the wire diameter (d) of a wire grid mesh model by multiplying it by ); and (F) using the wire grid mesh model with the wire diameter (d) set to the model angle ( A method for evaluating the performance of a mesh-type antenna device, comprising a process of observing the trend of electrical performance change based on the change of ). Claim 13 In claim 12, the equivalent coefficient n is the measured thread diameter ( A method for evaluating the performance of a mesh-type antenna device, characterized by being an equivalent coefficient for converting ) into the wire diameter (d) of a model. Claim 14 In claim 12, the equivalent coefficient n is set from 1 to m (m is an integer greater than 1), and the predetermined interval of the equivalent coefficient n is, A method for evaluating the performance of a mesh-type antenna device characterized by spacing. Claim 15 In Clause 12, length (l), width (w) and thread diameter ( Diagonal length (a) based on ), model angle ( A performance evaluation method for a mesh-type antenna device that calculates the reflection coefficient of a wide grid mesh model by calculating the wire diameter (d) as in the following Equation 1. [Equation 1] Claim 16 A method for evaluating the performance of a mesh-type antenna device according to claim 12, wherein if, as a result of comparison in process (E) above, a value of an equivalent coefficient n that matches the reflectance of the measured sample mesh (31) is not confirmed, two close matching results and the corresponding value of n are found, and the interval of the equivalent coefficient (n) is reduced further than the existing interval; and the process of repeating process (B) to process (D) above. Claim 17 In claim 16, the interval of the equivalent coefficient (n) is the initial interval It is an interval, and the second interval is A method for evaluating the performance of a mesh-type antenna device characterized by an interval of 0.

1. Claim 18 A method for evaluating the performance of a mesh-type antenna device according to claim 17, wherein if, as a result of comparison in process (E), a matching value of equivalent coefficient n is not confirmed even after repeating process (B) to process (D) once, the interval of the equivalent coefficient (n) is reduced further than the existing interval; and the process of repeating process (B) to process (D). Claim 19 In claim 18, the process of finding the equivalent coefficient (n) is intervals according to the desired result accuracy ( A method for evaluating the performance of a mesh-type antenna device characterized by reducing ) and repeating the above (B) process ~ above (D) process. Claim 20 In claim 19, the above model angle ( A method for evaluating the performance of a mesh-type antenna device characterized by having different values ​​corresponding to shape changes when the mesh is tensioned with different forces. Claim 21 In claim 20, in the result output section, the model angle ( A method for evaluating the performance of a mesh-type antenna device, further comprising a process of analyzing the performance of the mesh-type antenna device by predicting ).

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