Boundary Radiation Prevention Structure for RFID Compartment Isolation
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Solution Overview
Problem
RFID systems experience errors in position determination due to electromagnetic wave radiation and interference between compartments, leading to incorrect identification of RFID tags, especially in applications like electronic bookshelves where signals spill across compartment boundaries.
Innovation Solution
A boundary radiation prevention structure comprising a metal portion with an incident plane to block electromagnetic waves and a guide portion with a curved surface covered by an absorption layer to absorb induced current radiation, preventing signal leakage between compartments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a metal plane is used to block electromagnetic waves between compartments, then electromagnetic wave penetration is prevented, but boundary radiation from induced current at the metal plane edge causes signal leakage
Solution Approach 1:
The patent introduces a guide portion as an intermediary element between the metal plane and the absorption layer. This guide portion provides a controlled path for induced current to flow through the absorption layer, preventing the current from reaching the metal plane edge where it would generate boundary radiation. The guide portion thus mediates between the electromagnetic shielding requirement and the boundary radiation problem.
Solution Approach 2:
The patent converts the harmful induced current into a beneficial element by providing it with a controlled path through the absorption layer. Instead of allowing the induced current to flow freely to the edge and generate radiation, the guide portion channels it through the absorption layer, where the current's energy is dissipated as heat, effectively using the harmful current to activate the absorption mechanism.
2Area of stationary object
If compartments are placed close together to increase storage density, then space utilization is improved, but electromagnetic wave interference between compartments increases
Solution Approach 1:
The boundary radiation prevention structure acts as an intermediary shielding element between adjacent compartments. It includes a metal portion for blocking direct electromagnetic wave penetration and a guide portion with absorption layer to handle boundary radiation, enabling compartments to be placed closer together without interference.
Solution Approach 2:
The boundary radiation prevention structure uses composite construction combining conductive metal materials (for wave blocking) with electromagnetic absorption materials (for dissipating induced current energy). This composite approach provides both reflection and absorption mechanisms, effectively preventing interference while allowing compact compartment arrangement.
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
The structure effectively absorbs boundary radiation, preventing incorrect detection of RFID tags by spreading and completely absorbing induced current radiation, ensuring accurate position determination within compartments.
Implementation Method 1
the curved surface is covered by an absorption layer for absorbing the incident electromagnetic wave and a boundary radiation generated from the induced current radiation
Implementation Method 2
a metal portion, which has an incident plane adapted to block an incident electromagnetic wave from penetrating
Implementation Method 3
wherein the incident electromagnetic wave induces an induced current on the incident plane
Data Source
AI summary
The invention provides a boundary radiation prevention structure, comprising: a metal portion, and a guide portion. The metal portion has an incident plane adapted to block an incident electromagnetic wave, wherein the incident electromagnetic wave induces an induced current on the incident plane. The guide portion is located on one border of the incident plane and has a curved surface electrically connected to the metal portion for the induced current to pass through, wherein the curved surface is covered by an absorption layer for absorbing the incident electromagnetic wave and a boundary radiation generated from the induced current radiation.