Mobile communication device and antenna structure therein

A mobile communication device (1) includes an antenna structure which includes a grounding element (10) and an antenna element (11). There is a notch (102) at an edge (101) of the grounding element (10). The antenna element (11) is disposed in the notch (102) and includes a metal loop portion (12) and a monopole antenna (13). The metal loop portion (12) is electrically connected to the grounding element (10) with at least one shorting point (121, 122), such that a short-circuited closed metal loop is formed. The monopole antenna (13) has a first end (131) and a second end (132), wherein the first end (131) of the monopole antenna (13) is a feeding point connected to a signal source (14), and the second end (132) of the monopole antenna (13) is an open end surrounded by the closed metal loop.