| 摘要 |
PROBLEM TO BE SOLVED: To provide a calculation apparatus capable of calculating far field electric field intensity on a printed circuit based on the near field intensity on the printed circuit.SOLUTION: A calculation apparatus 30 analyzes a measurement result of near magnetic field intensity distribution at the component mounting side of a printed circuit 40 to determine a maximum intensity of near magnetic field generated by an evaluation object frequency component on the printed circuit 40, and an area S1 of a range in which the intensity of the near magnetic field generated by the evaluation object frequency component on the printed circuit 40 attenuates from the maximum intensity by a first predetermined rate. The calculation apparatus 30 calculates the far field electric field intensity at evaluation object frequency at a point separated away by distance r from the printed circuit 40 based on the area S1, a current value generating the near magnetic field of the maximum intensity, the evaluation object frequency, a distance r and a proportionality coefficient.SELECTED DRAWING: Figure 1 |
