This paper designs a vertically polarized, horizontal, omnidirectional vehicle antenna for the mobile communication band,\ncovering the available frequency bands of the wireless sensor network and 5G. The antenna is composed of semi-Tmonopole and\nsemicone monopole, which are placed vertically on the metal plate, especially suitable for being mounted on top of a car. T-branch\nmainly works at low frequency, and cone branch mainly works at high frequency. The cone branch adopts tapered structure in\norder to improve the impedance matching of antenna and increase the bandwidth of antenna. The antenna can be miniaturized by\ncutting the antenna in half. The operating frequencies of the antenna are 770 MHzâ??1000MHz and 1.7 GHzâ??3.78 GHz which can\ncover multiple wireless system bands, including GSM, LTE, and 5G.
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