Rfid antenna, rfid tag and rfid system
AssigneeLogistics and Supply Chain MultiTech R&D Centre Limited
InventorsJing Jung Tang, Leung Chiu, Xiao Sheng Chen
Life of this patent
Estimating the term…
Abstract
There is provided an antenna for a radio frequency identification (RFID) tag, which includes a loop antenna, an amplifying antenna, an additional antenna structure to modify impedance of the entire antenna. The additional antenna structure has a first electromagnetic coupling with the amplifying antenna and a second electromagnetic coupling with the loop antenna.
Claims21
An antenna for a radio frequency identification (RFID) tag, comprising:
- a loop antenna;
- an amplifying antenna;
- and
- an additional antenna structure to modify impedance of the entire antenna,
- wherein the additional antenna structure has a first electromagnetic coupling with the amplifying antenna and a second electromagnetic coupling with the loop antenna.
A method for improving a reverse link in a radio frequency identification (RFID) system including a RFID reader and a RFID tag, comprising:
- providing an antenna of the RFID tag, the antenna including a loop antenna and an amplifying antenna which are detachably combined;
- providing an additional antenna structure to the amplifying antenna to modify impedance of the entire antenna of the RFID tag;
- and
- optimizing a geometry of the additional antenna structure to obtain a desired impedance of the entire antenna.
Dependencies are inferred from the claim text.