Stretchable RFID Antenna End-Loading Orifice Integrity
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Solution Overview
Problem
Existing RFID systems fail to function effectively in environments with varying pressure, stress, and temperature due to sensitivity to dielectric changes and antenna deformation, leading to poor performance and failure.
Innovation Solution
A stretchable RFID device with an impedance-matched antenna and end-loading body that can stretch without consuming the orifice, combined with a meander line and tuning circuit, providing broad impedance bandwidth and mechanical integrity for operation in diverse dielectric environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional RFID systems are used, then they can operate in standard environments, but they fail to function effectively in environments with varying pressure, stress, and temperature due to sensitivity to dielectric changes and antenna deformation
Solution Approach 1:
The patent applies parameter changes by modifying the antenna's physical and electrical characteristics through end-loading structures. The end-loading body changes the electrical length and impedance parameters of the antenna, allowing it to maintain resonance and impedance matching across varying dielectric environments. This parameter adjustment enables the antenna to compensate for environmental changes without requiring redesign.
Solution Approach 2:
The patent utilizes composite material structures in the end-loading body that combines conductive materials with materials having specific dielectric properties. This composite construction allows the antenna to maintain stable electrical characteristics when embedded in different dielectric materials or subjected to environmental stress, thereby improving reliability across diverse conditions.
2Manufacturing precision
If RFID antenna is designed for specific dielectric constant, then it can achieve optimal performance at that specific condition, but changes in dielectric constant cause the RFID system to be detuned
Solution Approach 1:
The end-loading body structure provides dynamic adaptability by allowing the antenna's electrical parameters to adjust in response to changing dielectric conditions. The loading structure effectively changes the antenna's resonant frequency and impedance characteristics based on the surrounding dielectric environment, maintaining optimal performance across varying conditions rather than being fixed to a single design point.
Solution Approach 2:
The patent employs parameter changes through the end-loading configuration that modifies the antenna's electrical length and capacitance. By adjusting these parameters through the loading body's geometry and material properties, the antenna maintains impedance matching and resonance across a range of dielectric constants, preventing detuning while preserving manufacturing precision.
3Adaptability or versatility
If RFID antenna is exposed to changes in pressure, stress and temperature, then environmental factors can be monitored, but the antenna deformation leads to poor performance and failure
Solution Approach 1:
The patent employs flexible and deformable antenna structures that can accommodate physical stress and deformation without failing. The antenna design includes flexible mounting and routing that allows it to bend and deform with the host structure (such as tires or air springs) while maintaining electrical continuity and performance, thereby reliability under mechanical stress.
Solution Approach 2:
The use of composite materials in the antenna construction provides both mechanical flexibility and electrical stability. The composite structure allows the antenna to withstand temperature variations and mechanical stress while maintaining its resonant characteristics and impedance matching, ensuring reliable operation in harsh environments where both monitoring and performance are required.
4Adaptability or versatility
If end-loading body is designed to stretch, then the RFID device can accommodate deformation, but the orifice may be consumed during stretching
Solution Approach 1:
The end-loading body is designed with a nested or concentric structure where the orifice is positioned within the loading body's structure. This nesting arrangement allows the loading body to stretch and deform while the orifice remains protected within the structure, preventing the orifice from being consumed or collapsed during stretching operations.
Solution Approach 2:
The end-loading body employs flexible material construction that allows stretching while maintaining the structural integrity of the orifice. The flexible shell design enables the loading body to deform elastically under stress, accommodating stretchability requirements while the orifice maintains its structural stability and does not collapse or close during deformation.
Data Source
AI summary
According to the embodiments described herein, a stretchable RFID device can include an RFID chip and an RFID antenna. The RFID antenna can be electrically coupled and mechanically attached to the RFID chip. The RFID antenna can be impedance matched to the RFID chip across a broad bandwidth and can include two arms. Each of the two arms can include an end-loading body that at least partially surrounds an end-loading orifice. The end-loading body can stretch without consuming the end-loading orifice.