Detection and identification method of electromagnetic interference elements in limited-space

It is an inevitable trend that more and more divided RF systems are integrated into one rack for the new generation airborne electronic equipment development. However, the “module-based” electromagne-tic compatibility requirements, evaluation methods and other new electromagnetic compatibility issues have been inevitably brought out by the RF integrated technology's change from “device-based” design to “mo-dule-based” design. According to the principals of electromagnetic interference (EMI) element, the EMI detection theory and testing techniques for emission features of RF module in limited-space of integrated racks are researched and discussed, as well as the simulating measures of RF function thread. A novel methodology is proposed for EMI detection and identification in limited-space from the far-field radiation features of integrated racks, near-field emission features of function module and the conducted current emission features of integrated racks' interfacing cables. Many experimental tests are carried out upon one real airborne RF integrated racks by the research team, including far-field radiation tests, near-field emission tests of function module as well as cable current emission tests of the RF integrated racks. This method finally realizes the electromagnetic compatibi-lity test of the function module under the integrated environment, and also is proved to be feasible and accurate.