Patent ID: 8030947
Filing Date: 2011-10-04
Classification: G01R

Abstract:
1. An electronic apparatus noise measurement method comprising: connecting each of second and third ports of a network analyzer to a connection portion which is configured to be connected to a predetermined measurement point on a circuit to be measured; connecting a cable to the circuit to be measured; connecting an antenna for receiving an electromagnetic wave radiated from the cable to a first port of the network analyzer; measuring a three-port S parameter of the first, second, and third ports using the network analyzer, the three-port S parameter being expressed by an equation (1) when waves that enter the first, second and third ports are respectively represented by a converting the three-port S parameter into a mixed-mode S parameter expressed by equations (2) and (3); and calculating common-mode and normal-mode components of the electromagnetic wave radiated from the cable by calculating a common-mode component of S