With the adventof the fifth generation(5G) mobile communication era, there is an urgent demand for high-frequency and large-bandwidth acoustic resonators for RF front-end filtering and signal processing. The laterally excited bulk wave resonator (XBAR) has garnered significant attention from researchers due to its ultra-high operating frequency and substantial electromechanical coupling coefficient(k²). However, XBARs suffer from alow quality factor (Q), impeding their application in RF front-ends. This paper proposes XBARs based on ZY-cut lithium niobate (LiNbO₃). Resonator designs were optimized using the finite element method, and resonators were fabricated using micro-electro-mechanical systems. The resulting XBAR exhibiteda resonant frequency of 4.72 GHz, k² value of 26.9%, Q_{3 dB} value of 384, and temperature coefficient of frequency of -60.5×10^-6/℃ for the A1 mode, along with a resonant frequency of 13.5 GHzand k² value of 4.4% for the A₃ mode.