Apparatus and method for simulation of electromagnetic field and storage medium storing programs therfor

An apparatus for simulation of an electric current flowing through each element of an electronic apparatus having an angle-modulated wave source or an intensity of an electromagnetic field radiated from the electronic apparatus according to analysis in the frequency domain, comprising:

• a setting unit to select a frequency spectrum to be processed from among frequency spectrums included in said wave source and setting a plurality of sample frequencies from the selected spectrum;
• a calculating unit to calculate first physical amounts to be calculated at the analyzing frequency by analysis in the frequency domain with each sample frequency as the analyzing frequency for every said sample frequency;
• and
• a computing unit to find a ratio between a wave source value at a frequency sandwiched between adjoining sample frequencies and a corresponding linear interpolation value derived by linear interpolation on the wave source values at the sample frequencies and process the ratio and the corresponding linear interpolation value derived by linear interpolation of the first physical amounts calculated by the calculating unit so as to calculate the second physical amount to be calculated.

A method for simulation of an electric current flowing through each element of an electronic apparatus having an angle-modulated wave source or an intensity of an electromagnetic field radiated from the electronic apparatus according to analysis in the frequency domain comprising:

• selecting a frequency spectrum to be processed from among frequency spectrums included in said wave source and setting one sample frequency from the selected spectrum;
• calculating a first physical amount to be calculated at an analyzing frequency by analysis in the frequency domain for said sample frequency as the analyzing frequency;
• and
• calculating a second physical amount to be calculated by finding a ratio between a wave source value at said sample frequency and a wave source value at a frequency other than the sample frequency and processing the ratio and the first physical amount calculated by the calculating the first physical amount.

A storage medium storing programs used for realization of a simulation apparatus calculating an electric current flowing through each element of an electronic apparatus having an angle-modulated wave source or an intensity of an electromagnetic field radiated from the electronic apparatus according to analysis in the frequency domain, programs controlling a computer to perform a method comprising:

• selecting a frequency spectrum to be processed from among frequency spectrums included in said wave source and setting one sample frequency from the selected spectrum;
• calculating a first physical amount to be calculated at an analyzing frequency by analysis in the frequency domain for said sample frequency as the analyzing frequency;
• and
• calculating a second physical amount to be calculated by finding a ratio between a wave source value at said sample frequency and a wave source value at a frequency other than the sample frequency and processing the ratio and the first physical amount calculated by the calculating the first physical amount.

A method for simulation of an electric current flowing through each element of an electronic apparatus having an angle-modulated wave source or an intensity of an electromagnetic field radiated from the electronic apparatus according to analysis in the frequency domain, comprising:

• selecting a frequency spectrum to be processed from among frequency spectrums included in said wave source and setting sample frequencies from the selected spectrum;
• calculating first physical amounts to be calculated at an analyzing frequency by analysis in the frequency domain for said sample frequency as the analyzing frequency;
• and
• finding a ratio between a wave source value at a frequency sandwiched between adjoining sample frequencies and a corresponding linear interpolation value derived by linear interpolation on the wave source values at the sample frequencies and processing the ratio and the corresponding linear interpolation value derived by linear interpolation of the first physical amounts calculated by the calculating first physical amounts to be calculated so as to calculate the second physical amount to be calculated.

A storage medium storing programs used to realize a simulation apparatus to calculate an electric current flowing through each element of an electronic apparatus having an angle-modulated wave source or an intensity of an electromagnetic field radiated from the electronic apparatus according to analysis in the frequency domain, said programs controlling a computer to perform a method comprising:

• setting processing to select a frequency spectrum to be processed from among frequency spectrums included in said wave source and setting a plurality of sample frequencies from the selected spectrum;
• calculating processing to calculate first physical amounts to be calculated at an analyzing frequency by analysis in the frequency domain for said sample frequencies as the analyzing frequency;
• and
• computing processing to find a ratio between a wave source value at a frequency sandwiched between adjoining sample frequencies and a corresponding linear interpolation value derived by linear interpolation on the wave source values at the sample frequencies and process the ratio and the corresponding linear interpolation value derived by linear interpolation of the first physical amounts calculated by the calculating processing so as to calculate the second physical amount to be calculated.

An apparatus for simulation of an electric current flowing through each element of an electronic apparatus having an angle-modulated wave source or the intensity of the electromagnetic field radiated from the electronic apparatus according to analysis in the frequency domain, comprising:

• a setting unit to select a frequency spectrum to be processed from among frequency spectrums included in said wave source and setting one sample frequency from the selected spectrum;
• a calculating unit to calculate a first physical amount to be calculated at the analyzing frequency by analysis in the frequency domain with said sample frequency as the analyzing frequency;
• a computing unit to calculate a second physical amount to be calculated in the frequency domain of said frequency spectrum to be processed from the first physical amount, a wave source value of said sample frequency, and a wave source value of said frequency spectrum to be processed except said sample frequency;
• a detecting unit to detect whether or not a matrix used in the analysis in the frequency domain will be reused by the calculating unit when the electronic apparatus has a plurality of wave sources;
• and
• a decomposition unit to apply LU decomposition or LDU decomposition to the matrix which is reusable and is detected by said detecting unit.

An apparatus for simulation of an electric current flowing through each element of an electronic apparatus having an angle-modulated wave source or an intensity of an electromagnetic field radiated from the electronic apparatus according to analysis in the frequency domain, comprising:

• a setting unit to select a frequency spectrum to be processed from among frequency spectrums included in said wave source and setting a plurality of sample frequencies from the selected spectrum;
• a calculating unit to calculate a first physical amount to be calculated at the analyzing frequency by analysis in the frequency domain with each sample frequency as the analyzing frequency for every said sample frequency;
• a computing unit to calculate a second physical amount to be calculated in the frequency domain of said frequency spectrum to be processed from the first physical amount, a wave source value of said sample frequency, and a wave source value of said frequency spectrum to be processed sandwiched by said sample frequencies;
• a detecting unit to detect whether or not a matrix used in the analysis in the frequency domain will be reused by the calculating unit when the electronic apparatus has a plurality of wave sources;
• and
• a decomposition unit to apply LU decomposition or LDU decomposition to the matrix which is reusable and is detected by said detecting unit.