Far-field calculation method and far-field calculation program

Abstract

To calculate far-field fields quickly while maintaining calculation accuracy. [Solution] The far-field calculation method includes the steps of: the computer 12 calculating the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method; the computer 12 calculating factors necessary for calculating the far-field for each of the multiple cells using an interpolation function and a numerical Fourier transform of a predetermined filter function stored in an array; and the computer 12 calculating the far-field of the target structure using the near-field and factors of each of the multiple cells.

Claims

1. The computer calculates the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, The computer calculates the factors necessary for calculating the far field for each of the plurality of cells using a transformation function obtained by analytically transforming a predetermined filter function. The computer calculates the far field of the target structure using the near field of each of the plurality of cells and the factor, A method for calculating remote fields, characterized by including the following:

2. The computer calculates the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, The computer calculates the factors necessary for calculating the far field for each of the plurality of cells using an interpolation function and an array containing the numerical Fourier transform of a predetermined filter function. The computer calculates the far field of the target structure using the near field of each of the plurality of cells and the factor, A method for calculating remote fields, characterized by including the following:

3. The computer calculates the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, The computer calculates the factors necessary for calculating the far field for each of the plurality of cells using a predetermined filter function multiplied by an interpolation coefficient, The computer calculates the far-field of the target structure for some cells using the near-field of those cells and the factors of those cells, and for cells in the region between those some cells, it calculates the far-field of the target structure using the factors calculated by linear or higher-order approximation from the near-field of those cells and the factors of those some cells. A method for calculating remote fields, characterized by including the following:

4. When a plurality of cells included in the target structure can be divided into a first cell group and a second cell group having symmetry or antisymmetry with respect to translation or inversion with respect to the first cell group, the computer calculates the near-field of each of the plurality of cells included in the first cell group using an electromagnetic field analysis method. The computer performs the steps of calculating the factors necessary for calculating the far field for each of the plurality of cells using a predetermined filter function, In the multiple cells included in the first cell group, the near-field and the far-field are calculated using the factors of each cell. The steps include: calculating the far-field of the target structure using the near-field of the cell corresponding to each of the multiple cells in the second cell group from among the multiple cells in the first cell group having symmetry or antisymmetry, and the factors of the multiple cells in the second cell group; A method for calculating remote fields, characterized by including the following:

5. The computer calculates the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, The computer performs the following steps: using analytical calculations of a weighted geometric series, it calculates the factors necessary for calculating the far field for each of the plurality of cells; The computer calculates the far field of the target structure using the near field of each of the plurality of cells and the factor, A method for calculating remote fields, characterized by including the following:

6. The computer calculates the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, The computer performs the steps of calculating the factors necessary for calculating the far field for each of the plurality of cells using a predetermined filter function, The computer calculates the far field of the target structure using the near field of each of the plurality of cells and the factor, Includes, If the aforementioned multiple cells contain abnormal cells, In the step of calculating the near-field, The near-field of each of the plurality of cells when the abnormal cell is not included, and the near-field of the abnormal cell are calculated, In the step of calculating the aforementioned far-field, A method for calculating a far-field, characterized in that, in the process of calculating a far-field using the near-field of each of the plurality of cells when no abnormal cell is included, the computer calculates the far-field when an abnormal cell is included in the plurality of cells by adding the effect that the near-field of the abnormal cell has on the far-field.

7. The computer calculates the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, The computer performs the steps of calculating the factors necessary for calculating the far field for each of the plurality of cells using a predetermined filter function, The computer calculates the far field of the target structure using the near field of each of the plurality of cells and the factor, Includes, The step of calculating the aforementioned factor is: If the computer has a rectangular region where the value of the filter function is non-zero and constant, it performs the step of calculating the factor for each of the rectangular regions using the exact solution of a geometric series. A method for calculating remote fields, characterized by including the following:

8. The process involves calculating the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, A process to calculate the factors necessary for calculating the far field for each of the plurality of cells using a transformation function obtained by analytical Fourier transforming a predetermined filter function, A process to calculate the far field of the target structure using the near field of each of the plurality of cells and the factor, A remote field calculation program characterized by having a computer execute it.

9. The process involves calculating the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, A process to calculate the factors necessary for calculating the far field for each of the multiple cells, using an array containing the numerical Fourier transform of a predetermined filter function and an interpolation function, A process to calculate the far field of the target structure using the near field of each of the plurality of cells and the factor, A remote field calculation program characterized by having a computer execute it.

10. The process involves calculating the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, A process to calculate the factors necessary for calculating the far field for each of the multiple cells using a predetermined filter function multiplied by an interpolation coefficient, For some cells, the far-field of the target structure is calculated using the near-field of that cell and the aforementioned factor for that cell; for cells in the region between the aforementioned cells, the far-field of the target structure is calculated using the aforementioned factor calculated by linear or higher-order approximation from the near-field of that cell and the aforementioned factor for that cell; A remote field calculation program characterized by having a computer execute it.

11. When a plurality of cells included in the target structure can be divided into a first cell group and a second cell group having symmetry or antisymmetry with respect to translation or inversion with respect to the first cell group, the near-field of each of the plurality of cells included in the first cell group is calculated using an electromagnetic field analysis method. A process to calculate the factors necessary for calculating the far field for each of the plurality of cells using a predetermined filter function, In the multiple cells included in the first cell group, the near-field and the far-field are calculated using the factors of each cell. In the plurality of cells included in the second cell group, the process of calculating the far field of the target structure is performed using the near field of the cell corresponding to each of the plurality of cells included in the second cell group from among the plurality of cells included in the first cell group having symmetry or antisymmetry, and the factors of the plurality of cells included in the second cell group. A remote field calculation program characterized by having a computer execute it.

12. The process involves calculating the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, Using analytical calculations of a weighted geometric series, a process is performed to calculate the factors necessary for calculating the far field for each of the aforementioned multiple cells, A process to calculate the far field of the target structure using the near field of each of the plurality of cells and the factor, A remote field calculation program characterized by having a computer execute it.

13. The process involves calculating the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, A process to calculate the factors necessary for calculating the far field for each of the plurality of cells using a predetermined filter function, A process to calculate the far field of the target structure using the near field of each of the plurality of cells and the factor, Have the computer run it, If the aforementioned multiple cells contain abnormal cells, In the process of calculating the aforementioned near-field, The computer is instructed to perform a process to calculate the near-field of each of the plurality of cells when the abnormal cell is not included, and the near-field of the abnormal cell. In the process of calculating the aforementioned remote field, A far-field calculation program characterized in that, in the process of calculating the far-field using the near-field of each of the plurality of cells when no abnormal cell is included, the computer is instructed to perform a process to calculate the far-field when an abnormal cell is included in the plurality of cells by adding the effect that the near-field of the abnormal cell has on the far-field.

14. The process involves calculating the near-field of each of the multiple cells included in the target structure using an electromagnetic field analysis method, A process to calculate the factors necessary for calculating the far field for each of the plurality of cells using a predetermined filter function, A process to calculate the far field of the target structure using the near field of each of the plurality of cells and the factor, Have the computer run it, A far-field calculation program characterized in that, in the process of calculating the aforementioned factor, if there is a rectangular region where the value of the filter function is non-zero and constant, the computer is instructed to perform a process of calculating the aforementioned factor using the exact solution of a geometric series for each of the rectangular regions.

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