Radio frequency transponder system

摘要

Various embodiments relate to a radio frequency transponder. In one embodiment, the transponder includes: a substrate and at least one planar antenna on the substrate, the antenna having a shape determining a corresponding resonant frequency of the antenna, wherein the antenna is configured to cause a phase difference between backscattered signals generated in response to excitation of the antenna by orthogonally polarized interrogation signals at the resonant frequency, and the phase difference represents a code of the antenna.

主权项

1. A radio frequency transponder, comprising:
a substrate; and a plurality of planar antennas on the substrate, wherein each antenna has a shape configured to determine a corresponding resonant frequency of the antenna, wherein each of the antennas is configured to determine a phase difference between orthogonal components of a backscattered signal generated in response to excitation of the antenna at the resonant frequency, and wherein the phase difference represents a unique code for the antenna, the unique code being configured to be extracted only from the phase difference between the orthogonal components of the backscattered signal.