Back to results
US 2010/0060421 A1Published application
Rfid tag with a semi-enclosed coupler
OwnerChih-Chen Chang, Sui-Feng Luinventors
Life of this patent
Estimating the term…
Abstract
A RFID tag with a semi-enclosed coupler, wherein the coupler of the antenna layer is designed to be a semi-enclosed linear structure, and the open end of the coupler is connected to the antenna portion. One end of the antenna portion is inserted into the range of the coupler and the other end of which extends to the open end of the coupler. The length of the antenna portion can be an integer times of ¼λ, achieving the effect of signal stabilization and optimization.
Claims9
A RFID tag with a semi-enclosed coupler, comprising:
- a dielectric layer, an antenna layer laminated on a top surface of the dielectric layer, and a ground plane laminated on a bottom surface of the dielectric layer;
- wherein the antenna layer includes an antenna portion and a semi-enclosed coupler, one end of the coupler encloses one end of the antenna portion in such a manner that the one end of the coupler is located a certain distance from the one end of the antenna portion, and the other end of the coupler is an open end, a RFID chip is provided on the coupler, the one end of the antenna portion is located within an area enclosed by the coupler, and the other end of the antenna is connected to the open end of the coupler, so that the antenna layer is variable in length.
Dependencies are inferred from the claim text.