Fujitsu Corporation

Takeshi Kishimoto

Shinichi Ohtsu

Makoto Mukai

Sekiji Nishino

Kenji Nagase

An apparatus for calculating immunity from a radiated electromagnetic field which makes possible high-speed simulation of the electric current flowing through an electronic apparatus due to a radio wave radiated from an antenna, and a method and a storage medium storing programs used for the same which divides a radio wave radiated from an antenna into a carrier wave, upper sideband wave, and lower sideband wave, and uses the moment method to simulate the effect of the radio wave on an electronic apparatus by calculating the mutual impedance for one frequency component out of the above three frequency components and using that mutual impedance to solve the simultaneous equations under the moment method so as to calculate the electric current flowing through the electronic apparatus.

Apparatus for calculating immunity from radiated electromagnetic field, method for achieving calculation, and storage medium storing programs therefor

A simulation device and method to simulate the electric current flowing in electronic devices using the moment method, and to execute accurate simulation processing when the electronic device has an amplifier. An allocating device allocates defining dipoles to the input terminal and output terminal of an amplifier of an electronic device for the purpose of deriving the electric current flowing in the element. A creating device creates a simultaneous equation of the moment method having a form such that the amplifier input impedance is inserted into the input terminal dipole allocated by the allocating device, and the amplifier output impedance, or its inverse, and a dependent energy source responding to the amplification characteristics of the amplifier are inserted into the output terminal dipole allocated by the allocating device. A solving device solves the simultaneous equation of the moment method created by creating device.

Simulation device and method and program recording medium

A method, which generates data input to a device calculating the intensity of an electromagnetic field emitted from an electric circuit device, extracts surface data of a metal cabinet from the three-dimensional data of the electric circuit device, partitions the surface corresponding to the surface data into quadrilateral meshes, and outputs the data partitioned into meshes to the electromagnetic field intensity calculating device.

Method and device generating data input to an electromagnetic field intensity calculating device

An apparatus provided with a setting unit for selecting a frequency spectrum to be processed from among a plurality of frequency spectrums contained in an angle-modulated wave source and setting one or a plurality of sample frequencies from among the spectrums, a calculating unit for calculating an intensity of an electromagnetic field radiated from an electronic apparatus by analysis in the frequency domain under the moment method or the like using the sample frequency set by the setting unit as the analyzing frequency, and a computing unit for calculating a physical amount to be calculated other than the physical amount calculated by the calculation unit in the frequency domain of the frequency spectrum to be processed, by using a proportional operation, from the physical amount calculated by the calculating unit and the wave source value of the frequency spectrum to be processed.

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

The electromagnetic field intensity of an electromagnetic wave radiating from a multilayer substrate is correctly computed. A radiating electromagnetic wave analysis apparatus comprises a signal layer electric current distribution computation unit for obtaining the distribution of an electric current flowing through a signal layer in a distributed constant line approximation method or a transmission line analysis method; a multilayer substrate electric current distribution computation unit for computing the distribution of an electric current of an entire multilayer substrate in a moment method based on the distribution of the electric current obtained by the signal layer electric current distribution computation unit; and an electromagnetic field intensity computation unit for computing the electromagnetic field intensity of an electromagnetic wave radiating from a multilayer substrate based on the distribution of the electric current of the entire multilayer substrate computed by the multilayer substrate electric current distribution computation unit. The radiating electromagnetic wave analysis apparatus establishes a modelling method for quantitatively analyzing the state of the electric current flowing through a wave source and load and then flowing into a power supply layer and a ground layer.

Growing community of inventors

Kawasaki, Japan

Takeshi Kishimoto