Patent ID: 7733273

Claim:
An antenna attached to an object and transmitting electromagnetic waves modulated by a radio frequency identification (RFID) tag chip, the antenna comprising: a polyhedral dielectric material comprising a first side that is adjacent to the object, a second side that is parallel with the first side, and a third side that connects the first side and the second side; a feel loop having a vertical length and a horizontal length, formed in a part of the second side, and electrically connected with the RFID tag chip for supplying power to the RFID tag chip, the area being adjacent to the third side; a polygonal radiating patch formed in a part of the second side and magnetically coupled with the feed loop for radiating the electromagnetic waves; and a shorting plate formed in a part of the third side, disconnecting the radiating patch and the first side, and controlling the magnetic coupling of the radiating patch and the feed loop.