Kapur’s entropy based honey badger optimization for design of miniaturized frequency selective surface for 5G electromagnetic shielding

Electromagnetic interference (EMI) is the main cause for the malfunctioning of real-time applications such as antenna technology, military application, and mobile technology. The EMIs are caused by microwave radiation, and it is ineluctable to provide shielding against the radiation. Opacity and transparency along with lower weight can be achieved at the chosen frequency for some array of periodic elements. Hence we have proposed complementary frequency selective surfaces with the inclusion of a square loop pattern. The square loop pattern provides better stability and hence we have adopted it for our design. The performances are analyzed with the equivalent circuit (EC) incorporated with the transmission line model. The desired resonance frequency is obtained by using Kapur’s entropy criterion. Then the shielding effectiveness is obtained by optimizing the EC with the honey badger optimization algorithm. This will ensure the desired shielding features. For the normal and oblique incidence angle, our proposed approach produces a stable response along with two controlled passbands. The investigations are made using full-wave simulations.