Novel Miniaturized Wearable Frequency Selective Surface Design for Stable Nearfield Band-stop Characterization

This work aims to introduce a novel aspect of Frequency Selective Surface (FSS), which is essential for designing wearable shields in the X-band spectrum. Based on the provided discussion, a flexible band-stop scheme is proposed resulting in stabilized shielding effectiveness (SE) both in the nearfield (NF) and farfield (FF). To analyze the NF filtering capability of FSS, some discrete localized electric field probes are placed at different points of the NF zone. The frequency spectrum of the NF signal is extracted for two in-band and out-band harmonics. The final design shows one stabilized transmission zero. The transmission zero attenuation does not significantly change as a function of spatial distance from the FSS. Similarly, the shield does not experience a resonant frequency shift in the NF zone.