Patent ID: 8587491

Claim:
A mobile communication device comprising: a dielectric substrate having a surface; a radio frequency multi-band patch antenna formed from a conductive material on the surface of the substrate; a signal feed conductor connected to the patch antenna at a lower edge thereof; a tuning stub projecting from the patch antenna at an upper edge thereof; and a ground conductor connecting the patch antenna to a ground plane, wherein the patch antenna has defined therein first slot and a second slot, and wherein the first slot includes a first linear first-slot section projecting perpendicularly from the lower edge, into the patch antenna, to an inner end and a second linear first-slot section projecting from the inner end in a direction parallel to the lower edge; and wherein the second slot includes a first second-slot section projecting perpendicularly from the lower edge of the patch antenna into the patch antenna to a first end that is proximal to the first linear first-slot section, a second second-slot section projecting from the first end parallel to the lower edge to a second end distal from the first linear first-slot section, a third second-slot section projecting from the second end perpendicular to the lower edge in a direction away from the lower edge to a third end, and a fourth second-slot section projecting from the third end in a direction parallel to the lower edge toward the first linear first-slot section, and wherein the first linear first-slot section is dimensioned to be longer than the first second-slot section and the third second-slot section together, and wherein the first, second, third and fourth second-slot sections are disposed between the second linear first-slot section and the lower edge of the patch antenna, such that the second slot is nested within the first slot.