| 摘要 |
Provided is a radio frequency identification (RFID) tag antenna. The antenna comprises: a first dielectric substrate; a second dielectric substrate; a feeding structure for generating a circularly polarised wave, wherein a first structure of the feeding structure is located on the second dielectric substrate, a second structure of the feeding structure is located between the first dielectric substrate and the second dielectric substrate and is in contact with the first dielectric substrate and the second dielectric substrate, and the first structure and the second structure perform coupled feeding; and a slot formed by a radiation chip encircling the first dielectric substrate. The antenna further comprises: an excitation structure for re-generating a circularly polarised wave on the circularly polarised wave, provided on the surface of the first dielectric substrate, and located in the slot. By means of the present invention, the circularly polarised wave generated by the feeding structure is re-excited using the excitation structure, such that the working bandwidth of the circularly polarised wave is wider, identification distance is longer, an ultra-high frequency band can be covered, and the problem in the related art that a circularly polarised antenna is narrow in bandwidth is solved. |
