| 摘要 |
<p>The present invention belongs to the field of automatic identification technologies, and particularly is a radio-frequency identification system. The radio-frequency identification system is composed of a PC terminal, a reader, a reader antenna, a tag antenna and a tag chip, wherein the eigenfrequency of a receiving module of the reader is different from that of a transmitting module thereof. If a transmitting carrier frequency of the reader is set to be f 0 , a backscatter carrier frequency of the tag is F(f 0 ), where F represents a certain function relationship. The tag performs simple transformation on a transmitting carrier of the reader to obtain carriers with different frequencies so as to perform backscatter modulation. According to the present invention, self-interference as well as multipath interference of the radio-frequency identification system can be significantly reduced, thereby improving the sensitivity of the reader and the radio-frequency identification system.</p> |
