In this study, a compact, low-profile, top-hat monopole antenna is proposed. By designing a top hat for a monopole, the antenna profile reduces from 12.9 mm (0.25λ₀) to 2 mm (0.039λ₀) at acenter frequency of 5.8 GHz, which helps realize a low-profile antenna structure. The length of this top hat is 21 mm (0.41λ₀);therefore, the proposed antenna is compact. To match the proposed antenna around the center frequency, four metal holes connecting with the ground are added on the side of the top hat, and a lumped inductance element is added to the feeding port. Finally, a simple prototype is realized, which exhibits good matching around the center frequency of 5.8 GHz.