Patent ID: 7289064

Claim:
An antenna comprising: a first conductive layer having: a first patch radiating element operative within a first frequency band; and a first ring radiating element operative within a second frequency band, said second frequency band being different from said first frequency band, said first ring radiating element surrounding said first patch radiating element on said first conductive layer; a second conductive layer having: a second patch radiating element operative within said first frequency band; and a second ring radiating element operative within said second frequency band, said second ring radiating element surrounding said second patch radiating element on said second conductive layer; a dielectric layer between said first conductive layer and said second conductive layer; a third conductive layer having a ground plane with at least two slots for use in slot feeding said first patch radiating element, said third conductive layer being on an opposite side of said first conductive layer from said second conductive layer; and at least one dielectric layer between said first conductive layer and said third conductive layer; wherein said first patch radiating element and said first ring radiating element are direct fed radiating elements and said second patch radiating element and said second ring radiating element are parasitic radiating elements; and wherein a largest dimension of said first patch radiating element in a plane of said first conductive layer is greater than a largest dimension of said second patch radiating element in a plane of said second conductive layer.