| 摘要 |
PROBLEM TO BE SOLVED: To remarkably reduce the number of times of trials and the number of times of radio wave measurements and to easily optimize a signal line by predicting the radiant quantities of unwanted radio waves caused by a change in the signal amplitude of the signal line. SOLUTION: The diagram of the differential signal line of a model corresponding to a trial product estimated in the design of electronic equipment is drawn and the value of the signal amplitude for each of signal sources is set. Next, concerning this differential signal line model, the relation of a prescribed frequency and the radiant quantities of radio waves is found by EMI simulation and the radiant quantities of radio waves are predicted. It is decided whether these predicted radiant quantities of radio waves are equal with the case of the same signal amplitude value for two signal lines or not or whether the radiant quantities are optimal as entire electronic equipment or not. The trial product is produced on the basis of the differential signal line model at the optimal decision, the radiant quantities of radio waves of this trial product are measured and on the basis of this measured result, it is decided whether the radiant quantities of radio waves radiated from the trial product satisfy a standard or specification or not.
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