Characterization of Microstrip Resonator for EM Immunity Measurements

This paper presents a design of microstrip resonator. The microstrip resonator is used to generate an EM field for immunity testing of ICs located near the transmission line. The microstrip line is designed on an FR-4 substrate and the measurement results are compared with the 3D EM simulation results. Connecting the SMD capacitors to the microstrip line creates an LC resonator with a frequency of 13.56 MHz. At this frequency a resonance is generated that enables immunity tests with increased EM field amplitude. The results of the simulated EM field values are compared with the results obtained with the specially developed nearfield scanner.