Patent ID: 6100848
Filing Date: 2000-08-08
Classification: H01Q

Abstract:
A printed monopole antenna having a ground plane defined substantially perpendicular thereto and being operable within a first specified frequency band and a second specified frequency band, comprising:(a) a first printed circuit board having a first side and a second side, said printed circuit board lying in a plane substantially perpendicular to said ground plane;(b) a monopole radiating element comprising a conductive trace formed on said printed circuit board first side, said conductive trace having an electrical length so as to have a primary resonance within said first specified frequency band;(c) a feed port including a signal feed portion and a ground portion, said signal feed portion being coupled only to the feed end of said conductive trace; and(d) a parasitic element formed on said printed circuit board second side, wherein no direct electrical connection exists between said monopole radiating element and said parasitic element, said parasitic element covering a specified area so as to tune said conductive trace to have a secondary resonance within said second specified frequency band.