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(a) The structure of XBAR with crystalline z-axis perpendicular to the platelet surface; shear wave resonance (A1 Mode) by applying lateral electrical field parallel to the crystalline y-axis [120]. (b) Key characteristics of the XBAR resonator addressing 5G requirements [123]. (c) Admittance curve from 2D periodic simulation indicating main XBAR mode and spurious mode [120]. Reproduced with permission from [120].
