Chipless tag detection and recognition based on frequency modulated continuous wave

Abstract

Towards the commercialization of chipless radio frequency identification (RFID) systems, there are still some pressing issues. The detection and identification of chipless RFID tags are mainly realized by a vector network analyzer (VNA). In practice, this equipment is costly and not convenient enough. This paper designs a maneuverable detection model based on frequency modulated continuous wave (FMCW), the detection target is an 8-bit chipless tag based on a variable-side-length spiral resonance unit and decodes the amplitude and phase information. On this basis, signal processing is performed on the generated amplitude and phase based on the Savitzky-Golay (SG) smoothing algorithm, and then the simulation data of HFSS is compared with ADS model data by the matrix pencil method (MPM). The results show that the proposed FMCW-based method can be effectively implemented in wireless communication, providing a new solution for flexible and inexpensive chipless tag detection and recognition.

Wireless mm-Wave Chipless Pressure Sensor

“…To interrogate the sensor wirelessly, two commercial WR28 standard gain horn antennas operating in the frequency range of interest (26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40) were placed below the polystyrene table to illuminate the sensor from the superstrate side. The antennas can be oriented so as to transmit and receive the same polarization or to receive cross-polarization.…”

“…The mm-wave radar is not at the moment devoted to detect frequency selective response of a target as it generally provides range-Doppler map only. However, since frequency-modulated continuous-wave (FMCW) radar interrogates the target with multiple tones, the detection of the frequency response is possible as demonstrated by some groups [40], [41], [42]. Other than commercial devices, other groups have designed FMCW radar with a considerable operation band (60-90 GHz) which can be used for the same purpose [43].…”