Chipless RFID Tag Layout for Multi-ID Directional Detection
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Solution Overview
Problem
Conventional chipless RFID systems using object shape as ID cannot present a plurality of IDs.
Innovation Solution
An ID tag system comprising elements with specific reflection intensity patterns in different directions, detected by a radar device analyzing reflection intensity and distance relationships in reception radio waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single object shape is used as ID in chipless RFID, then the tag can be manufactured at low cost without antenna structure, but only one ID can be presented
Solution Approach 1:
The ID tag is segmented into multiple elements (first element, second element, third element, fourth element) arranged in a row. Each element has specific reflection intensity characteristics in different directions, allowing the system to present multiple IDs by detecting different directional patterns without requiring multiple separate tags or complex antenna structures.
Solution Approach 2:
The invention transitions from a single-objectID approach to a multi-element array approach, adding the dimension of spatial arrangement. By arranging elements in a row and detecting reflection patterns from different directions (first direction and second direction), the system can encode multiple IDs within a single tag structure, effectively using directional information as an additional dimension for ID differentiation.
2Adaptability or versatility
If multiple elements with different reflection patterns are arranged in a row, then multiple IDs can be presented, but the device complexity increases
Solution Approach 1:
Each element in the array has a specific local quality in terms of its reflection intensity pattern. The first element has peak reflection in both first and second directions, the second element has peak only in first direction, the third element has peak only in second direction, and the fourth element has no peak in either direction. This local differentiation allows each element to contribute uniquely to the overall ID presentation capability.
Solution Approach 2:
The invention changes the parameter of reflection intensity distribution across different elements and directions. By controlling which elements have peaks in which directions, the system can encode different ID information without changing the physical structure or material composition of the elements themselves, thereby managing complexity through parameter variation rather than structural complexity.
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
Enables presentation of multiple IDs using a single chipless RFID system by arranging elements with specific reflection patterns to specify the ID tag, enabling efficient detection of IDs from different directions.
Implementation Method 1
a radar device which transmits a transmission radio wave to the ID tag in a direction opposite to the first direction and a direction opposite to the second direction, and acquires a first reception radio wave by reflecting the transmission radio wave transmitted in the first direction by the ID tag, a second reception radio wave by reflecting the transmission radio wave transmitted in the second direction by the ID tag
Data Source
AI summary
A plurality of IDs are presented by chipless RFID using an object shape as an ID. Provided is an ID tag for arranging in a row a plurality of elements selected from: a first element having a peak of a reflection intensity in a first direction and a second direction; a second element having the peak of the reflection intensity in the first direction and having no peak of the reflection intensity in the second direction; a third element having the peak of the reflection intensity in the second direction and having no peak of the reflection intensity in the first direction; and a fourth element having no peak of the reflection intensity in the first direction and the second direction.