Abstract
The resonant frequency of indoor wireless communication based on wireless fidelity (Wi-Fi) and Bluetooth is limited to several gigahertz (GHz). Following the international mobile telecommunications specification proposed by international telecommunication union in 2020 (ITUIMT-2020), communication links with sub-terahertz (sub-THz) waves are desired for indoor networks in the coming years. In this study, we present a flexible terahertz (THz) metamaterial (FTM) filter consisting of cross-shaped metamaterial configurations on a polydimethylsiloxanes (PDMS) substrate. As a band-stop filter, such designed FTM filters possess the selectivity of resonant frequency and thus provide a controllable transmission carrier for a broad frequency range in the sub-THz window. The FTM filters can generate a tuning range of over 85-GHz resonant shift from 360.6 GHz to 446.1 GHz by changing the distance between the top and bottom metamaterial layers. For specific frequency carriers in passband, the proposed FTM filters show the transmission intensity higher than 94%. This design will play a key role in the future indoor wireless communication with miniaturization, large tuning range, and high transmission intensity characteristics. • Tunable metamaterial filter (TMF) shows high transmission intensity and large tuning range. • Tuning range of TMF is 85 GHz from 360 GHz to 445 GHz. • For wireless THz communication from, the proposed TMF can modulate specific carriers. • TMF enables the transmission end of the communication system more flexible in data processing. • TMF provides a feasible scheme for the future ultra-high-speed wireless transmission system.
Published Version
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