| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide numerical tables for use in finding radio-wave loss and phase of a radio wave shielding object, a creating method for creating the numerical tables, and method and apparatus for finding radio-wave loss and phase of a radio wave shielding object, in which the numerical tables, the creating method, and the method and apparatus are capable of easily and rapidly calculating substantially accurate radio-wave shielding loss and phase even if the radio wave shielding object has a complicated shape, a building structure having a radio wave transmission part, a sharp irregular shape, or the like, and of being sufficiently practical as a general technology. <P>SOLUTION: Numerical tables of real numbers and imaginary numbers are created from a graph indicating absolute values, real numbers, and imaginary numbers (true values) of Fresnel integration. The numerical tables are set such that their range is three times a first Fresnel zone radius in length and it has a 51 by 51 cells grid. A radio wave shielding projection drawing of the radio wave shielding object, created in the same range as the numerical tables, is superimposed on the numerical tables of real numbers and imaginary numbers, and transmittances in individual cells of the grid are multiplied by corresponding values in the numerical tables. Subsequently, the products are added. By calculating a logarithm of a square root of a square sum of the total of the real numbers and the total of the imaginary numbers, the radio shielding loss is found. <P>COPYRIGHT: (C)2013,JPO&INPIT |
