Investigation on the deployment of FSS as electromagnetic shielding for 5G devices

This paper proposes the use of frequency selective surfaces as electromagnetic shielding on 5G communication devices. This technique intends to enhance the susceptibility from external radiated fields while decreases the radiation emissions in out of communication band, improving the overall electromagnetic compatibility performance of the device. Besides the shielding effect, the frequency selective surface structure should have minimal interference on 5G communication. In order to address this concern, the effects of the FSS shielding in a 28GHz 5×5 patch antenna array installed on a generic smart phone was investigated. Numerical results shows that this technique blocks electromagnetic fields generated at lower frequencies as intended, such as those produced by a DDR4 system operating at 3.2GHz, while decreasing the main lobe of the antenna array in less than 0.9dB for a theta scan angle ranging from 0 to 30 deg.