Patent ID: 7245260
Filing Date: 2007-07-17
Classification: H01Q

Abstract:
1. A dual band antenna for a communication device to transmit/receive radio signals within a higher frequency band and a lower frequency band, comprising: a metal strip, formed on a substrate that includes a first surface and a second surface, and further comprising a first band portion and a second band portion wherein a tail of said first band portion is connected to said second band portion, wherein said first band portion is formed on said first surface, said second band portion is formed on said second surface, and said first band portion is electrically connected to said second band portion through a conductive aperture of said substrate; and a feeding leg, extended from a head of said first band portion so as to connect with a signal processing circuit; wherein said first band portion has a predetermined length equal to a quarter wavelength of an operating frequency band of the lower frequency band, a length and a width of the second band portion being selectively adjustable for tuning the higher frequency band.