Radiated Spurious Emission Prediction Based on Dipole Moment and Full Wave Simulation

In this paper, an equivalent dipole moment method and full wave simulation are proposed to predict radiated spurious emissions (RSE). The proposed method is utilized in design of a practical electronic device. Based on near field patterns, the radiation physics of 2.4GHz Wi-Fi transmitter harmonics in the device is identified to be a magnetic dipole moment. Reduction of loop size is proved to be an effective method to reduce RSE of 2.4 GHz. In addition, RSE of 5 GHz Wi-Fi transmitter is simulated using a full wave solver and methods to reduce RSE are discussed. Measured RSE results are also shown to validate proposed prediction and mitigation methods.