Fast characterization of the radiated desensitization of mobile devices

An efficient two-step approach to characterize the radiated desensitization of the mobile device is presented. In first step of this approach, a broadband, low noise and large dynamic range analog optical fibre system developed by the author was used to get the accurate EMI level coupled into the receiving antenna when the interferer is on and off respectively; in the second step, the radiated desensitization can be either estimated based on the EMI level change when the interferer is activated, or further quantified by radiated sensitivity measurement focusing on the problematic channels identified in the first step. The analog fibre system has the advantage of high isolation and higher accuracy, enabling a fast and accurate characterization of the EMI picture and radiated desensitization, avoiding the time-consuming full-channel sweep in conventional radiated sensitivity measurement.