RFID Transponder Array for Jewelry Reading Reliability
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Solution Overview
Problem
Existing jewelry-based RFID systems face reliability issues with data reading due to limited reading areas and orientations, leading to potential errors in access control and authentication.
Innovation Solution
A ring-shaped jewelry piece with a transponder array of multiple RFID transponders arranged peripherally on a metal body, featuring near-field and far-field antennas, and covered with non-metallic materials like carbon fiber or gemstones, ensuring stable data transmission and protection against interference and unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single RFID transponder is used in the jewelry, then the device complexity is low, but the reliability of data reading is insufficient due to limited reading area and orientation constraints
Solution Approach 1:
The single RFID transponder is segmented into multiple transponders arranged in a circular array pattern around the jewelry body. This segmentation allows the system to read data from multiple positions and orientations simultaneously, significantly improving data reading reliability while maintaining manageable complexity through standardized transponder components
Solution Approach 2:
The transponders are arranged in a circular pattern around the jewelry body, adding a spatial dimension to the reading capability. This circular arrangement enables the system to read data regardless of the jewelry's rotational position or orientation relative to the reader, transforming a single-point reading system into a multi-directional reading system
2Area of stationary object
If multiple RFID transponders are arranged close together to enlarge the reading region, then the reading area is significantly enlarged, but mutual interference between transponders increases
Solution Approach 1:
The patent applies different local qualities to the transponder array by using non-metallic covering materials (such as carbon fiber or gemstones) at specific locations around the jewelry body. These materials provide localized electromagnetic shielding to reduce mutual interference between adjacent transponders while maintaining the overall compact circular arrangement and enlarged reading area
Solution Approach 2:
The jewelry incorporates composite material structures combining metallic and non-metallic materials. The non-metallic covering materials (carbon fiber, gemstones) are integrated with the metallic jewelry body to create a composite structure that reduces electromagnetic interference between transponders while preserving the aesthetic appearance and mechanical integrity of the jewelry
3Power
If active RFID transponders with power supply are used, then the data transmission capability is enhanced, but the jewelry cannot be worn indefinitely due to power consumption
Solution Approach 1:
The RFID transponders are designed as passive transponders that harvest electromagnetic energy from the reader's signal to power their operation. This self-service capability allows the transponders to function indefinitely without an external power supply, as they draw energy dynamically from the reading environment, eliminating the power consumption limitation of active transponders
4Length of stationary object
If far-field antennas are integrated into the jewelry, then the reading distance is extended beyond 2 cm, but the jewelry's aesthetic appearance and value may be compromised
Solution Approach 1:
The patent uses thin-film antenna structures that can be integrated into the jewelry surface without adding significant bulk or visual prominence. These thin-film antennas maintain the jewelry's aesthetic appearance while providing extended reading distance capability, allowing the antenna function to be concealed within the jewelry's structural design
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
Enhances data reading reliability and security by allowing data retrieval from various positions and orientations, reduces interference, and provides long-term operation without power supply, while maintaining the jewelry's aesthetic value and protecting against mechanical and chemical influences.
Implementation Method 1
an RFID transponder is connected with an antenna structure or itself has an integrated antenna structure by means of which signals can be exchanged with a reading device
Implementation Method 2
the RFID transponders have exclusively or at least partially a near-field antenna integrated into a chip housing. Antennas of this sort can in this regard be especially easily incorporated in the overall appearance of the piece of jewellery or concealed therein
Implementation Method 3
at least one far field antenna with a material length of total at least 8.5 cm. Thereby, the data stored on the piece of jewellery can be reliably transferred also across a distance of more than 2 cm
Data Source
AI summary
A ring-shaped piece of jewelry has a metal main body, which forms a receiving opening, and an RFID transponder, in which data that can be read out are stored and which is connected to an antenna structure, by means of which antenna structure signals can be exchanged with a reading device. The RFID transponder is part of a transponder array having at least two additional RFID transponders, which extend peripherally on a peripheral surface of the metal main body, and the transponder array has a distance of 2 to 6 mm between two adjacent RFID transponders.