Radio frequency identification tag antenna for attaching to metal
AssigneeElectronics and Telecommunications Research Institute
InventorsWon Kyu Choi, Jeong Seok Kim, Gil Young Choi, Cheol Sig Pyo
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Abstract
An antenna includes a polyhedral dielectric material, a feed loop, a polygonal radiating patch, and shorting plates. The feed loop is electrically connected with a radio frequency identification (RFID) tag chip for supplying power to the RFID tag chip. The polygonal radiating patch is magnetically coupled with the feed loop for radiating the electromagnetic waves. Each of the shorting plates disconnects the radiating patch and a ground surface and controls the magnetic coupling of the radiating patch and the feed loop. Accordingly, an RFID tag that can be attached to a metal material is provided.
Claims10
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.
An antenna attached to an object and transmitting electromagnetic waves modulated by a radio frequency identification (RFID) tag chip, the antenna comprising:
- a hexahedral dielectric material having a bottom surface attached to the object;
- a feed loop formed in a part of an upper surface of the dielectric material, being adjacent to a first side among a plurality of sides of the dielectric material, and electrically coupled with the RFID tag chip for supplying power to the RFID tag chip;
- a polygonal radiating patch formed in a part of the upper surface of the dielectric material and magnetically coupled with the feed loop for radiating the electromagnetic waves;
- and
- a plurality of shorting plates respectively formed in a part of the first side and disconnecting the radiating patch and the bottom surface of the dielectric material.
Dependencies are inferred from the claim text.