| 摘要 |
A dual-band or single-band dipole antenna comprises a first radiating unit, a second radiating unit, and a coaxial cable. The first radiating unit includes a first hollow cylinder and a first side wall. In this case, the first side wall, which is disposed on one end of the first hollow cylinder, has a protrusion portion, a first hole, and at least one groove. The first hole is disposed in the protrusion portion, and the groove is disposed on the protrusion portion. The second radiating unit includes a second hollow cylinder and a second side wall. The second side wall is disposed on one end of the second hollow cylinder. The coaxial cable includes a central conductor and an outer conductor. The central conductor is electrically connected to the first radiating unit through the first hole, and the outer conductor is electrically connected to the second radiating unit.
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