An omnidirectional low-profile multiband antenna is designed and fabricated for vehicular telecommunication applications. The fabricated antenna with a radiator patch size of 0.26λL×0.3λL has a low-profile of 0.022λL and shows multiple resonant frequencies at 1.14, 1.91, and 2.45 GHz. Omnidirectional radiation patterns in the azimuth plane and vertical polarization at all operating frequency bands were obtained. Antenna gains greater than 1.7 dBi were obtained at the three operating frequencies, and the antenna height is 6 mm. Therefore, the proposed antenna is applicable to the vehicular telecommunication system.
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