A Dual-Band Polarized Reconfigurable MEMS Based Frequency Selective Surfaces (FSS)

This paper introduces a tunable Frequency Selective Surface (FSS) that makes use of a MEMS switch.By combining hard magnetic materials with microelectromechanical systems (MEMS), a reconfigurable frequency-selective electromagnetic filter is created, which offers a new variation of reconfigurable frequency-selective surfaces (FSS). Adjusting the FSS’s operating frequency can be done without physically changing the size of the dipole components by integrating magnetically actuated dipole components that can be tilted away from the base surface. The 5 * 5 array of 365 mm used in this work each consists of a 73 * 73 * 1.5 mm plate made of Roger-RO3003 material with , layered with a 0.03 mm-thick copper conductor (Cu). The proposed system comprises a cross dipole printed on a Rogers-RO3003 substrate, incorporating a MEMS switch between one of the dipole arms to modify its length. The MEMS switch enables frequency tuning by adjusting the length of a rectangular dipole. This phase modulation technique enables the steering of reflected waves, improving beam resolution and coverage, while allowing the intelligent reflecting surface (IRS) to dictate the direction of reflection. The reconfigurable FSS design presented has shown the ability to tune its resonant frequency from C-band to S-band without changing its dimensions physically. The design was analyzed using a commercial simulator (ADS), and the numerical findings are consistent with experimental results, validating its effectiveness.