Patent ID: 6624793
Filing Date: 2003-09-23
Classification: H01Q

Abstract:
A dual-band dipole antenna, adapted to be disposed on a dielectric substrate, comprising:two substantially rectangular radiating metallic sheets, symmetrically disposed on two sides of the dielectric substrate with respect to the central line thereof, thererby forming two arms of the dual-band dipole-antenna, wherein each of the substantially rectangular radiating metallic sheets further has a feeding point disposed opposite to the other feeding point for transmitting signals; and a U-shaped slot of which opening is in the direction of the feeding point for dividing the substantially rectangular radiating metallic sheet into a larger sub-metallic sheet and a smaller one, wherein the former serves to generate a first (lower frequency) operating mode of the dual-band dipole antenna, and the latter serves to generate a second (higher frequency) operating mode thereof; and a coaxial transmission line having a core conductor and an external ground conductor which are respectively connected to the feeding points.