Radiated emission and susceptibility of breath monitoring system based on UWB pulses in spacecraft modules

This work is included in a project of ASI, which involves several Italian entities, universities and companies, called NIMURRA, that stands for “Non Invasive Monitoring by Ultra wide band Radar of Respiratory Activity of people inside a spatial environment”. It regards the placement of a UWB radar inside a spatial module to obtain information on the respiration of astronauts. Using a pulse characterized by a very wide bandwidth in a highly resonant environment, which contains electronic instrumentation, it is necessary to consider EMC issues relating to radiated emissions, but also with regard to the susceptibility of the UWB radar itself. The objective of the work is to give some useful information to the designer of the monitoring system that take into account the EMC problem. In particular considering the radiated emission and susceptibility problem we obtain some information on the maximum input signal that can be radiated by the system, and to the maximum electric field level that the system has to tolerate in order to fulfill the EMC standard.