A low-profile dual U-shaped monopole antenna designed for WLAN, WiMAX, and C-band applications has been implemented in this paper. The proposed antenna has covering frequency ranges of 2.7-3.1 GHz, 4.0-5.2 GHz, and 5.9-6.4 GHz. The compact antenna's antenna size is 24×30×0.8 mm3, and the antenna has achieved bandwidths of 13.79%, 26.67%, and 8.1% across the respective bands. This frequency band is achieved as a result of dual inversion to each other in U shape. The low profile of the proposed antenna enables its easy and fast inculcation in modern communication devices.