Micropatterns FSS Optimization Through Hybrid EBPSO Algorithm for C-Band Shielding Applications

This letter presents a new concept of micropattern frequency selective surface (MFSS) for C-band electromagnetic interference shielding applications. The design consists of 64 microstructures, which are optimally arranged in an 8 × 8 array using a hybrid evolutionary binary particle swarm optimization (EBPSO) algorithm. Microstructures are comprehensively designed and optimized to achieve polarization-insensitive and high oblique incident angle stable characteristics with miniaturized structure. The equilibrium arrangement of the micropattern geometry of the proposed FSS provides a high selective stopband filtering response at 7.39 GHz with an S21< −10 dB stopband bandwidth percentage of 25.64%. The precipitable novelties of this letter are generating micropatterns FSS structure for high shielding effectiveness >70 dB and maintaining patterns symmetry for polarization insensitivity with the miniature structure of 0.18λ₀ × 0.18λ₀ × 0.036λ₀, where λ₀ corresponds to the lower operating frequency.