Continuous RFID Encoding with Segmented Antennae
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current RFID printer-encoder systems face challenges in efficiently reading and writing to closely spaced UHF RFID tags without anti-collision management, which increases system complexity, cost, and reduces throughput, and require significant media spacing and shielding, limiting the use of smaller transponders and reducing operational efficiency.
Innovation Solution
The implementation of a printer-encoder system with multiple spaced antennae and a controller that allows for simultaneous encoding of RFID tags, using near-field and wide-field antennae to selectively communicate with each tag, eliminating the need for shielding and enabling continuous printing and encoding of closely spaced tags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple passive transponders are within the range of the same RF transceiver electromagnetic field, then wireless data acquisition and transmission can be performed, but errors occur in reading and writing to a specific transponder
Solution Approach 1:
The patent divides the RF electromagnetic field into multiple isolated zones using physical barriers (RF shielding) and spatial separation. Each zone contains a single transponder, allowing the RF transceiver to communicate with one transponder at a time without interference from others. This segmentation resolves the contradiction by enabling reliable communication (one transponder at a time) while maintaining high throughput through continuous processing of multiple transponders in different zones.
Solution Approach 2:
The patent introduces RF-shielded housings and anechoic chambers as intermediary structures between the RF transceiver and transponders. These intermediaries isolate the electromagnetic field to specific regions, creating controlled environments where single-transponder communication occurs. The shielding acts as a mediator that prevents cross-talk between adjacent transponders while allowing the system to process multiple transponders sequentially.
2Productivity
If anti-collision management techniques are used to read and write to multiple transponders, then near simultaneous reading and writing can be achieved, but system complexity, cost and delay response increase
Solution Approach 1:
Instead of using complex anti-collision protocols to manage multiple transponders, the patent segments the physical space into isolated zones using RF shielding and spatial separation. This physical segmentation eliminates the need for complex software-based anti-collision management, reducing system complexity while maintaining the ability to process multiple transponders through parallel physical isolation.
Solution Approach 2:
The patent replaces the software-based anti-collision management system with a hardware-based physical isolation system. Rather than using complex signal processing and protocol management to prevent collisions, the invention uses physical RF shielding and spatial arrangement to eliminate collisions, substituting mechanical/physical solutions for software complexity.
3Reliability
If RF-shielded housings and anechoic chambers are used to isolate transponders, then reading and writing errors can be prevented, but cumbersome shielding and significant spatial separation are required
Solution Approach 1:
The patent applies RF shielding locally around each transponder or in specific zones where transponders are positioned, rather than requiring comprehensive shielding of the entire system. This localized approach provides sufficient isolation to prevent reading errors while minimizing the overall spatial requirements and making the system more compact and easier to operate.
4Quantity of substance
If transponders are closely spaced on media, then material costs and media volume are reduced, but communication with each individual transponder becomes more difficult
Solution Approach 1:
The patent segments the RF electromagnetic field into distinct zones using physical barriers and spatial arrangement, allowing multiple transponders to be closely spaced on media while maintaining communication selectivity. Each transponder resides in its own isolated zone, enabling the system to communicate with each one individually despite their close physical proximity on the media.
Solution Approach 2:
The patent introduces RF-shielded housings and spatial zones as intermediaries between the RF transceiver and closely spaced transponders. These intermediaries create isolated communication channels for each transponder, enabling reliable selective communication even when transponders are positioned close together on the media, thus eliminating the need for large spacing between transponders.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the throughput of RFID media encoding, allows for precise communication with individual tags, reduces the need for shielding, and increases the flexibility in transponder placement, improving operational efficiency and cost-effectiveness.
Implementation Method 1
the transponder is exposed to an RF electromagnetic field by the transceiver that couples with and energizes (if passive) the transponder through electromagnetic induction
Implementation Method 2
UHF radio frequency identification (RFID) technology allows wireless data acquisition and/or transmission from and/or to active (battery powered) or passive transponders using a backscatter technique
Implementation Method 3
UHF radio frequency identification (RFID) technology allows wireless data acquisition and/or transmission from and/or to active (battery powered) or passive transponders using a backscatter technique
Data Source
AI summary
An encoder device for encoding a series of radio frequency identification tags supported by media includes a media path, at least two antennae, at least one transceiver, and a controller. Media and radio frequency identification tags are advanced along the media path. The at least two antennae are spaced from each other and each of the antennae are positioned along the media path adjacent to at least one of the radio frequency identification tags. The at least one transceiver is configured to communicate with the antennae. The controller is configured to communicate individually with each of the respective radio frequency identification tags positioned adjacent the antennae using the transceiver and the antennae.