Patent ID: 6879942

Claim:
An apparatus for calculating immunity from a radiated electromagnetic field which segments an antenna and electronic apparatus into elements, calculates a single common mutual impedance among the elements, and solves simultaneous equations under a moment method defining a relationship among the mutual impedance, a wave source and an electric current flowing through the electronic apparatus so as to simulate the electric current flowing through the electronic apparatus due to a radio wave radiated by the antenna, the radio wave having wave components comprising a carrier wave component, an upper sideband wave component, and a lower sideband wave component, the apparatus comprising: a first calculating unit setting a representative frequency representative of the carrier wave frequency, representative of the upper sideband frequency, and representative of the lower sideband frequency, and calculating, among elements at the set representative frequency, the single common mutual impedance which commonly represents the mutual impedance of each of the carrier wave frequency, the upper sideband frequency, and the lower sideband frequency; and a second calculating unit solving a single system of simultaneous; equations under the moment method having the single common mutual impedance calculated by the first calculating unit to calculate a total electric current flowing through the electronic apparatus due to the wave components of the radio wave radiated by the antenna.