Feifei Lin, Hao Ni, Weiwei Zhao, L. Z. Liu, Yijie Zhang, Zijing Huang, Wenjin Wang, Qixiang Wang, Tushun Wang, Yan Bai, Ning Ding, Shujuan Liu, Wei Huang, Qiang Zhao
Flexible millimeter-wave (mmWave) antennas hold great promise for conformal integration across diverse devices and high-speed, large-channel capacity in 5G/6G wireless communications. Spoof surface plasmon polaritons (SSPPs) structure with periodic grooves is well-suitable for designing miniaturized, flexible and ultra-wideband planar mmWave antennas. However, achieving high-precision fabrication of SSPP configurations with optimal micrometer-scale filling factors using flexible conductive materials remains highly challenging. Herein, we report the high-precision all-Ti 3 C 2 -printed flexible ultra-wideband mmWave endfire antennas based on SSPPs for wireless communication. The SSPPs antenna exhibits a wide operating bandwidth of 25–49 GHz, which stems from the reactance properties of the ordered multilayer structure of Ti 3 C 2 . The S- parameter and gain can be well maintained even after cyclic bending, owing to the robust adhesion between the polydopamine-modified substrate and the Ti 3 C 2 film. This work pioneers the demo instance of flexible Ti 3 C 2 antenna for high-speed (446.06 Mbps), large-capacity, and low-latency mmWave wireless communication.