Apparatus and method for detecting electromagnetic wave source, and method for analyzing the same

An electromagnetic wave source detecting apparatus comprising:

• a plurality of probes for measuring intensities of an electromagnetic field generated from an object to be measured of an electronic apparatus at each position which changes twoIdimensionally along a measured object plane near said measured object;
• and
• calculation means for calculating a phase difference or time difference between magnetic fields associated with said probes from the electromagnetic field intensities measured by the individual plural probes at each measuring position, determining a locus of a presumptive electromagnetic wave source on the measured object plane from geometrical relations of said plurality of probes to said measured object on the basis of the phase difference or time difference calculated at each measuring position, detecting an intersection of loci of the presumptive electromagnetic wave source which are determined at a plurality of measuring positions to calculate and identify a position of an electromagnetic wave source existing inside said measured object and further calculating magnitude of a current in the electromagnetic wave source existing at the identified position on the basis of the electromagnetic field intensities measured by said probes at each measuring position.

An electromagnetic wave source detecting apparatus comprising:

• a plurality of probes for measuring intensities of an electromagnetic field generated from an object to be measured of an electronic apparatus at each measuring position which changes two-dimensionally along a measured object plane near said measured object;
• and
• calculation means for calculating a phase difference or time difference between magnetic fields associated with said probes from the electromagnetic field intensities measured by the individual plural probes at each measuring position, determining a locus of a presumptive electromagnetic wave source on the measured object plane from geometrical relations of said plurality of probes to said measured object on the basis of the phase difference or time difference calculated at each measuring position, detecting an intersection of loci of the presumptive electromagnetic wave source which are determined at a plurality of measuring positions to calculate and identify a position of an electromagnetic wave source existing inside said measured object, and further calculating magnitudes of current distribution in a plurality of electromagnetic wave sources existing at individual plural positions identified similarly on the basis of the electromagnetic field intensities measured by said probes at each measuring position.

An electromagnetic wave source detecting method comprising the steps of measuring intensities of an electromagnetic field generated from an object to be measured of an electronic apparatus at each measuring position which changes twoIdimensionally along a measured object plane near the measured object by using a plurality of probes,

• calculating a phase difference or time difference between magnetic fields associated with said probes from the magnetic field intensities measured at each measuring position, determining a locus of a presumptive electromagnetic wave source on the measured object plane from geometrical relations of said plurality of probes to said measured object on the basis of the phase difference or time difference calculated at each measuring position, and detecting an intersection of loci of the presumptive electromagnetic wave source which are determined at a plurality of measuring positions to calculate and identify a position of an electromagnetic wave source existing inside said measured object.

An electromagnetic wave source detecting method comprising the steps of measuring intensities of an electromagnetic field generated from an object to be measured of an electronic apparatus at each measuring position which changes two-dimensionally along a measured object plane near the measured object by using a plurality of probes,

• calculating a phase difference or time difference between magnetic fields associated with said probes from the electromagnetic field intensities measured at each measuring position, determining a locus of a presumptive electromagnetic wave source on said measured object plane from geometrical relations of said plurality of probes to said measured object on the basis of the phase difference or time difference calculated at each measuring position, detecting an intersection of loci of the presumptive electromagnetic wave source which are determined at a plurality of measuring positions to calculate and identify an electromagnetic wave source existing inside said measured object, and further calculating magnitude of a current in the electromagnetic wave source existing at the identified position on the basis of the electromagnetic field intensities measured by said probes at each measuring position.