A wideband cup dielectric resonator antenna (CDRA) with a monopole-like mode is presented. A new coil feeding structure is used, creating an equivalent magnetic current loop above the ground plane, exciting the CDRA $\textrm {TM}_{01 \delta } $ mode and an equivalent electric dipole at the adjacent frequency band. Thus, a broad bandwidth is achieved from two adjacent resonances. A CDRA with $0.25\lambda _{0} $ diameter and $0.23\lambda _{0} $ height ($\lambda _{0} $ is the center frequency free-space wavelength) is fabricated and measured. About 29% of −10 dB matching bandwidth (2.98–4.00 GHz) is achieved. The structure has a low cross-polarization level and stable radiation patterns within the entire operating bandwidth. [ABSTRACT FROM AUTHOR]