Patent ID: 8098201

Claim:
A radio frequency identification (RFID) tag including an antenna that receives an interrogation signal corresponding to a radio frequency (RF) signal and a chip that generates a response signal corresponding to the interrogation signal, the RFID tag comprising: the antenna, comprising: a first polygonal dielectric material having a first plane surface corresponding to a ground plane and a second plane surface that does not contact the first plane surface; a first microstrip line formed in a part of the second plane surface, and having first and second lateral ends and covering a left side of the second plane surface at least at corner surfaces of the left side; a second microstrip line formed in another part of the second plane surface, and having first and second lateral ends and covering a right side of the second plane surface opposite the left side at least at corner surfaces of the right side, wherein the first lateral ends of the first and second microstrip lines face each other; a second polygonal dielectric material having a third plane surface and a fourth plane surface that does not contact the third plane surface, and that is stacked on the second plane surface of the first dielectric material such that the third plane surface is stacked on and contacts the second plane surface; and a third microstrip line formed in the fourth plane surface, and having two lateral ends, wherein the second lateral ends of the first and second microstrip lines are electrically connected to the ground plane, wherein the first microstrip line and the second microstrip line serve as a ground plane of the third microstrip line; and the chip partially formed in the second plane surface and electrically connected to the first lateral ends of the first and second microstrip lines, wherein the chip transmits the response signal corresponding to the interrogation signal through the antenna.