Metal Cap RFID Tag Antenna Segmentation for Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional RFID tags embedded within metal caps cannot communicate with external communication devices due to the metal material interference, and external RFID tags are prone to removal, compromising container security and authenticity verification.
Innovation Solution
A metal cap design incorporating an RFIC element and a loop antenna with at least a portion of the loop antenna extending circumferentially and exposed outside, allowing communication with external devices, while a magnetic shield inductor chip maintains resonance frequency stability and a power feeding module is positioned to minimize magnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RFID tag is disposed inside the metal cap, then the RFID tag is securely fixed and cannot be easily removed, but the metal material blocks the communication between the RFID tag and external communication devices
Solution Approach 1:
The patent divides the RFID tag into two separate parts: the RFIC element is disposed inside the metal cap for security, while the loop antenna is disposed outside the metal cap for communication. This segmentation allows each component to be optimally positioned for its specific function, resolving the contradiction between security and communication capability.
Solution Approach 2:
The loop antenna acts as an intermediary component that bridges the RFIC element inside the metal cap and external communication devices. By placing the antenna outside the metal cap, it serves as a mediator that enables electromagnetic communication without being blocked by the metal material, while the RFIC remains securely enclosed.
2Loss of information
If the RFID tag is disposed outside the metal cap, then the RFID tag can communicate with external devices, but the RFID tag can be easily removed which compromises container security
Solution Approach 1:
The patent segments the RFID tag system into an internal RFIC element secured within the metal cap and an external loop antenna for communication. This segmentation allows the critical security component to remain enclosed while the communication component operates externally, resolving the contradiction between security and communication accessibility.
3Device complexity
If the loop antenna is entirely disposed inside the metal cap, then the RFID tag structure is compact and secure, but the metal cap blocks the magnetic field and prevents effective communication
Solution Approach 1:
The patent segments the antenna structure so that only the necessary communication portion (loop antenna) extends outside the metal cap, while the control electronics (RFIC) remain inside. This partial external placement maintains compactness for the critical components while enabling sufficient communication capability.
Solution Approach 2:
The loop antenna is configured to extend in the circumferential direction of the metal cap, utilizing the radial dimension to protrude outward. This dimensional arrangement allows the antenna to access the external electromagnetic field environment while maintaining a compact overall structure integrated with the cap.
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 secure communication between the RFID tag and external devices even when embedded within the metal cap, preventing unauthorized access and ensuring content authenticity, with enhanced magnetic field distribution and resonance frequency stability.
Implementation Method 1
a loop antenna connected to the RFIC element, in which at least a portion of a loop opening of the loop antenna extends in a circumferential direction of the metal cap while being exposed from an opening edge of the opening part of the metal cap to the outside of the metal cap
Implementation Method 2
a magnetic shield inductor chip maintains resonance frequency stability
Data Source
AI summary
A metal cap is provided with an RFID tag that includes a metal cap including a cylindrical main body part, a top plate part formed at one end of the cylindrical main body part, and an opening part formed at the other end of the cylindrical main body part, and an RFID tag disposed on the metal cap. The RFID tag includes an RFIC element disposed in the metal cap, and a loop antenna connected to the RFIC element. At least a portion of a loop opening of the loop antenna extends in a circumferential direction R of the metal cap while being exposed from an opening edge of the opening part of the metal cap to the outside of the metal cap.