Patent ID: 6870505
Filing Date: 2005-03-22
Classification: H01Q

Abstract:
1. An antenna; comprising: a layer of first dielectric material having a first surface and a second surface; a first antenna element formed on said first surface of said layer of first dielectric material; a second antenna element formed on said first surface of said layer of first dielectric material; an insulating gap separating said first antenna element from said second antenna element except for a first shorting strip and a second shorting strip forming conducting paths from said first antenna element to said second antenna element, wherein said to insulating gap has a first width, said first shorting strip has a second width, and said second shorting strip has said second width; a third antenna element having a first length, a first end, and a second end formed on said second surface of said layer of first dielectric, wherein part of said third antenna element has a third width, part of said third antenna element has a fourth width, and said first length is an integral multiple of one quarter of the wavelength of a first frequency; a first input/output connection region in said second end of said third antenna element; a fourth antenna element having a second length, a first end, and a second end formed on said second surface of said layer of first dielectric, wherein said fourth antenna element has said fourth width and said second length is equal to an integral multiple of one quarter wavelength of a second frequency; a third shorting strip having a first length and a fifth width, wherein said third shorting strip forms a conducting path between said second end of said third antenna element and said second end of said fourth antenna element; a conducting path between said first antenna element and said first end of said third antenna element; a conducting path between said second antenna element and said first end of said fourth antenna element; a ground plane having a first surface and a second surface; a second input/output connection region on said first surface of said ground plane; a layer of second dielectric material between said first surface of said ground plane and said second surface of said layer of first dielectric; and a number of electrical conducting paths between said ground plane and said second antenna element.