Micro-Electro-Mechanical Systems Based Frequency Reconfigurable Butterfly Slit-Coupled Microstrip-Fed Antenna

To suit the requirements of various wireless system s for antennas with different operating frequencies, this article pr oposes a novel type MEMS frequency reconfigurable slit-coupled microstrip-fed antennas, which adds two metal sheets connecting combs arround the slit. By electrostatically actuating the comb te eth to drive the movement of metal sheets, to change the width of the slit ultimately affects the slit between the microstrip feeder an d the patch antenna. This antenna adopts butterfly slit coupling t o increase slit variation and achieve a larger adjustable frequency range. The comb teeth on two flanks drive two metal sheets to mo ve away from the microstrip feeder in a horizontal direction perp endicular to it. The resonant frequency of the antenna shifts to th e left. When the displacement of the metal sheets is 10um, the ante nna can achieve an adjustable resonant frequency in the 1.18GHz range. The simulation results show that the variation of antenna frequency within this range is monotonic, indicating that the ante nna can effectively achieve frequency reconfigurability. The articl e uses HFSS and ANSYS to simulate the RF and mechanical perf ormance of the antenna and verify its reliability. This antenna ac hieves high frequency reconfigurability with small displacement, providing a theoretical model for the design of smart antennas.