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In this paper, a 60-GHz CMOS RFIC-on-chip triangular monopole antenna is presented. A planar triangular-monopole structure fed by the CPW line is adopted to design the on-chip antenna. The FEM-based 3D full-wave EM solver, Ansoft HFSS, is used for the design simulation. The antenna chip is fabricated with a 0.18-mum CMOS process. The on-wafer measurement in a microwave probe station is conducted to measure the input VSWR and the antenna gain of the designed RFIC-on-chip antenna.