Patent ID: 8358251

Claim:
An antenna comprising: two branches that each extend outward from a connecting region where the branches are connected to an integrated receive circuit of a backscatter-based radio frequency identification (RFID) transponder, each of the branches comprising a first trace segment connected to the connecting region and a second trace segment connected to the first trace segment, each of the second trace segments extending substantially parallel to its first trace segment, each of the first and second trace segments being substantially U shaped, each of the first and second trace segments being formed from three legs, each of the legs of each the first trace segments being spaced apart from an adjacent one of the legs of its second trace segment; and a third trace segment that connects the two branches to each other, the third trace segment being substantially yoke shaped; wherein, in each of the branches: each of the first and second trace segments has a first end and a second end; the first end of the first trace segment is connected to the first end of the second trace segment; the second end of the first trace segment is connected to the second end of the second trace segment; and the second end of the first trace segment or the second trace segment is connected to the connecting region.