Introduction

The developed system Ultra Wide Band – RFID allows for the precise location and tracking of tagged objects, at low cost. It is made by a reader that interrogates multiple tags (passive or semi-passive) thus determining their distance with centimeter-level accuracy.

Technical features

The system Ultra Wide Band (UWB) – RFID is made by a reader that interrogates multiple tags (passive or semi-passive) in the vicinity by transmitting a query signal. The tags respond to reader via backscatter modulation that is to vary the load as a function of the antenna that the tag sends the reader (typically the identifier). By a proper analysis of the UWB backscattered signal, the reader is able to estimate with centimeter-level accuracy the distance of tags (ranging). If more readers are present, tags can be localized by combining all ranging estimates.

Possible Applications

• Centimeter-level ranging accuracy of batteryless tags;
• RFID systems;
• Precise localization and tracking
  of the objects with tags at low cost.

Advantages

• Several UWB-RFID systems coexisting in the same area;
• Resistance to interference;
• Centimeter-level ranging;
• Low average power transmitted;
• Excellent penetration through walls;
• Higher degree of security ;
• High number of tags manageable simultaneously.