In this study, a novel compact auto-tracking antenna system was developed to ensure the high reliability of practical applications. The system consisted of three antennas (two anchor antennas and a tag antenna), three ultra-wide band (UWB) chips, and one compact turntable. On the anchor side, two highly linearly polarized antennas with a short baseline were installed on an auto-control turntable. Two UWB chips were integrated with the two anchor antennas to extract the phase and amplitude information of the receiving signal. On the tag side, a wide-beam circularly polarized antenna with a UWB chip was installed to mitigate the effect of the tag’s pose on the phase measurement. Using a correlation matching algorithm based on the phase difference of arrival, high tracking reliability with a 90% success rate was achieved for all practical direction-of-arrivals and various axial rotating angles of the tag over the maximum radiation deflection angles between –90◦ and 135◦. The operation distance of a demo self-balanced two-wheeled vehicle was 20 m.
Bibliographical noteFunding Information:
Funding: This work was supported in part by the Fundamental Research Funds for the Central Universities under Grant CUC210F005, and in part by the National Natural Science Foundation of China (NFSC) under Grant 62071436.
- Direction of arrival (DOA)
- Phase difference of arrival (PDOA)
- Radio frequency identification (RFID)
- Ultra-wide band (UWB)
ASJC Scopus subject areas
- Control and Systems Engineering
- Signal Processing
- Hardware and Architecture
- Computer Networks and Communications
- Electrical and Electronic Engineering