KR-20260063278-A - Performance evaluation apparatus and method for mesh type antenna apparatus for mounting satellite

KR20260063278AKR 20260063278 AKR20260063278 AKR 20260063278AKR-20260063278-A

Abstract

The present invention relates to an apparatus and method for evaluating the performance of a satellite-mounted mesh-type antenna device 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; 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 ).

Inventors

조승주
서창원
김성필
윤성식
황징
박준성
박성욱

Assignees

한화시스템 주식회사
한국과학기술원

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (20)

A modeling unit that determines model units using a sample mesh and models the 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 above; A wire grid mesh model is generated using the above parameters, and the model angle ( A simulation unit that simulates the trend of electrical performance change based on changes in ); and Based on the trend of electrical performance change of the mesh simulated in the above simulation unit, different model angles ( A performance evaluation device for a mesh-type antenna device for satellite mounting, comprising a result output unit that outputs a trend of electrical performance change according to ).
In Article 1, The above 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).
In Article 1, The above wire diameter (d) is one or more thread diameters ( A performance evaluation device for a mesh-type antenna device including ).
In Article 1, The above simulation unit is, A mesh model configuration unit that generates a wire grid mesh model using electromagnetic analysis software based on the above parameters; The above 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 a wide grid mesh model by extracting periodic units at predetermined intervals from the above equivalent coefficient n; A comparison unit that compares the reflectance according to the reflection coefficient above with the reflectance of a sample mesh that has been pre-measured and stored for the corresponding mesh sample, and verifies the value of an equivalent coefficient n that matches the reflectance of the sample mesh; and The value of the equivalent coefficient n that matches the reflectance of the measured sample mesh confirmed in the above comparison section 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 ).
In Article 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.
In Article 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.
In Article 4, The above 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 in the following Equation 1. [Formula 1]
In Article 4, The above electrical performance change is a performance evaluation device for a mesh-type antenna device that utilizes the range of change in electrical characteristics using the transmittance of the mesh.
In the modeling section, the process of determining model units using a sample mesh and modeling the model shape; A process of measuring parameters of the model shape from an image captured by magnifying a metal mesh used as a sample mesh in a parameter measurement unit; In the simulation section, a wire grid mesh model is generated using the above parameters, and the model angle ( A process of simulating trends in electrical performance changes based on changes in ); and In the result output section, based on the trend of electrical performance change of the simulated mesh, different model angles ( A method for evaluating the performance of a mesh-type antenna device including a process for outputting a trend of electrical performance change according to ).
In Article 9, The process of outputting the above electrical performance change trend is a model angle of the mesh pannon 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.
In Article 10, The above electrical performance change is a method for evaluating the performance of a mesh-type antenna device using the range of change in electrical characteristics using the transmittance of the mesh.
In Article 9, The process of simulating the above electrical performance change trend is, (A) A process of generating a wire grid mesh model using electromagnetic analysis software based on the above parameters in the mesh model configuration section; (B) In the mesh model setting section, the measured 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 a comparison unit, the reflectance according to the reflection coefficient is compared with the reflectance of a sample mesh that has been previously measured and stored for the corresponding mesh sample, and a value of an equivalent coefficient n that matches the reflectance of the sample mesh is determined; (E) If, based on the above comparison result, the value of the equivalent coefficient n that matches the reflectance of the measured sample mesh is confirmed, the mesh model determination unit determines the value of the equivalent coefficient n that matches the confirmed reflectance of the measured sample mesh as the thread diameter ( The process of setting the wire diameter (d) of the wire grid mesh model by the value multiplied by ); and (F) Using a wire grid mesh model with the wire diameter (d) set above, 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 ).
In Article 12, The above 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.
In Article 12, The above equivalence coefficient n is set from 1 to m (m is an integer greater than 1), and The predetermined interval of the above equivalent coefficient n is, A method for evaluating the performance of a mesh-type antenna device characterized by spacing.
In Article 12, Length (l), width (w) and thread diameter ( Diagonal length (a) based on ), model angle ( A method for evaluating the performance of a mesh-type antenna device by calculating the reflection coefficient of a wide grid mesh model by calculating the wire diameter (d) as in the following Equation 1. [Formula 1]
In Article 12, If, as a result of the comparison in the above process (E), 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 A method for evaluating the performance of a mesh-type antenna device comprising the process of repeating the above (B) process ~ the above (D) process.
In Article 16, The interval of the above 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.
In Article 17, If, as a result of the comparison in process (E) above, a matching value of equivalence coefficient n is not confirmed even after repeating processes (B) to (D) above once, a process of reducing the interval of the equivalence coefficient (n) further than the existing interval; and A method for evaluating the performance of a mesh-type antenna device comprising the process of repeating the above (B) process ~ the above (D) process.
In Article 18, The process of finding the above equivalent coefficient (n) is based on the desired result accuracy, with intervals ( A method for evaluating the performance of a mesh-type antenna device characterized by reducing ) and repeating the above (B) process ~ above (D) process.
In Article 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.

Description

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