Rfid Tag and Rfid Reader

Simple SummaryContent extracted from patent full text and abstract with AI.

The invention describes a novel RFID tag and RFID reader system that improves the identification process when multiple RFID tags respond simultaneously (collisions) to a reader's query. The RFID tag can individually set its response frequency (Backscatter Link Frequency, BLF) based on a measured signal in the reader’s query and an individual random number, while the reader can send specially shaped signals and use multiple antennas to enhance tag separation. This dynamic setting and recognition of unique response frequencies enables the system to better identify and distinguish between multiple tags, even in crowded environments.

Use CasesContent extracted from patent full text and abstract with AI.

• Inventory management in warehouses or retail where high densities of tagged items can lead to response collisions.
• Supply chain tracking where rapid identification of many items passing through checkpoints is critical.
• Event access control when large groups of RFID-tagged credentials must be scanned simultaneously.
• Smart libraries or archives for mass check-in/check-out of books or assets.
• Industrial automation for tracking parts and components on assembly lines with many tags in close proximity.

BenefitsContent extracted from patent full text and abstract with AI.

• Reduces errors and increases reliability when identifying multiple RFID tags simultaneously, thus improving overall speed and throughput.
• Minimizes tag collision issues without needing complex prior knowledge of tag numbers or their arrangement.
• Compatible with existing EPCglobal class 1 gen 2 RFID standards, ensuring easy integration into current systems or upgrades.
• Enhances performance through the use of multiple antennas and flexible frequency assignment, potentially identifying more tags per read cycle.
• Adaptive to both conventional and new RFID tag types, providing transition compatibility and future-proofing.
• No substantial changes to tag hardware are needed, keeping costs low for large-scale deployment.
• System can automatically switch between standard and enhanced modes based on the reader’s capability, maintaining broad compatibility.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention refers to an Radio Frequency Identification (RFID) tag (3) configured for communicating with an Radio Frequency Identification (RFID) reader (1), wherein said RFID tag (3) is configured to receive a query command from said RFID reader (1), to measure a duration of a TRcal signal comprised by said query command, and to determine an individual Backscatter Link Frequency for communicating with said RFID reader (1) based on said measured duration of said TRcal signal. The invention also refers to an RFID reader and to a corresponding method.