Patent ID: 8073641

Claim:
An electromagnetic field distribution measuring apparatus for measuring an electromagnetic field distribution in the vicinity of an object to be measured, the object being arranged to function as an electromagnetic wave radiation source, the apparatus comprising: a probe for deriving a signal corresponding to intensity of an electric field and/or a magnetic field in a space in the vicinity of the object to be measured; a scanner for scanning the probe at an arbitrary set of measurement coordinates; a detector arrangement for detecting the signal during a predetermined measurement time period at each of sets of measurement coordinates at which the probe is positioned, and storing the results of measurements with the probe; a computer arrangement for (a) computing the field intensity during the measurement time period based on the detected signals; (b) computing an amplitude probability distribution during the measurement time period at each set of measurement coordinates based on the computed intensity; and (c) mapping data about the electromagnetic field distribution on the object to be measured by using intensity values of the amplitude probability distribution when a probability is a predetermined value at the measurement coordinates, or by using probability values of the amplitude probability distribution when an intensity is a predetermined value at the measurement coordinates.