Experimental Validations of Characteristic Mode Analysis Predictions Using GTEM Measurements

Numerous simulations and measurements are typically required to quantify the electromagnetic interference statistics of a device due to radiation at different angles of incidence, polarization, and frequency. Characteristic Mode Analysis (CMA) has the potential to reduce the number of necessary measurements and simulations by revealing the device's modal behavior, which allows the prediction of the variations in the interfering current. In this work, we describe an experimental setup to verify the CMA predictions of the coupling and interfering current to different devices. The experimental setup involves placing the device inside a GTEM cell to emulate far-field excitation. The currents coupled to different devices are compared with the CMA predictions and excellent agreement is achieved. This experimental verification demonstrates the versatility of CMA for electromagnetic compatibility and interference applications.