Abstract
A circularly polarized (CP) UHF RFID tag antenna is proposed in this paper. This antenna is realized by a meandering cross dipole. The meandering structure of the dipole could adjust amplitudes and phases from the two orthogonal arms of the cross dipole such that a CP frequency would be generated by the mutually-orthogonal mode. Therefore, we can achieve CP operation from the tag. The maximum transmitted power can be obtained when the input impedance of the tag is conjugate-match with the impedance of the RFID chip. A special matching structure is employed in this design to control the input impedance of the tag. This tag antenna is designed to cover whole UHF band (840-960 MHz), and its 3-dB axial-ratio (AR) bandwidth is 43 MHz (905-948 MHz). © 2013 IEEE.
| Original language | English |
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| Title of host publication | IEEE iWEM 2013 - 2013 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition |
| Publisher | IEEE Computer Society |
| Pages | 156-159 |
| ISBN (Print) | 9781479903597 |
| DOIs | |
| Publication status | Published - 2013 |
| Event | 2013 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition - Hong Kong, China Duration: 1 Aug 2013 → 3 Aug 2013 |
Workshop
| Workshop | 2013 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition |
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| Abbreviated title | iWEM 2013 |
| Place | China |
| City | Hong Kong |
| Period | 1/08/13 → 3/08/13 |
Research Keywords
- circularly polarized
- dipole antenna
- radio frequency identification (RFID)
- tag antenna