Antenna structure

摘要

An antenna structure comprising a substrate and an antenna (1) is provided. The substrate comprises an upper surface and an under surface. The antenna (1) comprises a first metal pattern and a second metal pattern. The first metal pattern is disposed on the upper surface. The first metal pattern comprises a feeding portion (111) and a transmission line (112) connected to the feeding portion (111). The second metal pattern is disposed on the under surface, and comprises a first parasitic grounding arm (121), a second parasitic grounding arm (122), a connecting arm (123), a grounding plane (124) and a grounding strip. The connecting arm has a parasitic slot (141), and connects the first parasitic grounding arm and the second parasitic grounding arm. The grounding strip connects the connecting arm and the grounding plane. The antenna is capable of operating several frequency bands.