3D RFID Tag Antenna Wrapping Substrate for Metal Read Performance
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Solution Overview
Problem
RFID tags experience significant signal attenuation when mounted on metal surfaces, hindering their effectiveness in tracking metal containers and components in industries like transportation.
Innovation Solution
A three-dimensional RFID tag structure with a continuous conductive path formed by wrapping antenna portions around a substrate, providing improved energy transfer and read performance on conductive surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a planar RFID tag configuration is used, then the device complexity is low and ease of manufacture is high, but signal attenuation occurs when mounted on metal surfaces
Solution Approach 1:
The patent transitions from a planar two-dimensional antenna configuration to a three-dimensional structure where the antenna wraps around a substrate. This dimensional change allows the antenna to achieve a continuous conductive path that maintains signal strength when mounted on metal surfaces, resolving the contradiction between read performance and structural complexity.
Solution Approach 2:
The antenna is configured to wrap around and enclose the substrate, creating a nested structure where the substrate is positioned within the antenna loop. This nesting arrangement provides electromagnetic shielding and maintains a continuous conductive path, improving read performance while keeping the overall structure compact.
2Use of energy by moving object
If the antenna is configured in a planar layout, then manufacturing is simple, but energy transfer is insufficient on conductive surfaces
Solution Approach 1:
The antenna structure extends from a flat planar layout into three dimensions by wrapping around the substrate. This dimensional transformation creates a continuous conductive path that efficiently transfers energy when mounted on metal surfaces, while the wrapping process remains compatible with standard manufacturing techniques.
Solution Approach 2:
The antenna is configured with curved paths that wrap around the substrate rather than following straight planar lines. This curvature allows the antenna to maintain optimal orientation relative to the mounting surface, improving energy transfer efficiency while still being manufacturable using conventional processes.
3Reliability
If a three-dimensional antenna structure is implemented, then signal strength is maintained on metal surfaces, but the device complexity increases
Solution Approach 1:
The substrate is nested within the antenna loop, creating a compact three-dimensional structure. This nesting approach maintains signal strength by ensuring a continuous conductive path while keeping the overall device footprint small and the structure manageable, thus limiting the increase in device complexity.
Solution Approach 2:
The antenna and substrate are combined into an integrated structure where the antenna wraps around the substrate rather than being a separate component. This merging reduces the number of discrete parts and simplifies assembly, offsetting the increased structural complexity with improved integration.
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 read performance of RFID tags on metal surfaces by maintaining signal strength and clarity, overcoming the attenuation issues faced by traditional planar configurations.
Implementation Method 1
An RFID tag includes an antenna that receives energy through the wireless transfer of electromagnetic energy from a source transceiver
Implementation Method 2
a continuous conductive path is made from the first electrical terminal of the RFID integrated circuit, to the first antenna portion, to the second antenna portion, and to the second electrical terminal of the RFID integrated circuit
Data Source
AI summary
In embodiments of the present invention improved capabilities are described for a three-dimensional Radio Frequency Identification (RFID) tag structure with an opening though the structure.