Low-Loss Barium Ceramic for RFID Signal Transmission
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Solution Overview
Problem
RFID devices embedded in items often face signal attenuation due to the material they are made of, limiting the detection range of RFID transceivers.
Innovation Solution
A device comprising a body made of low-dielectric loss barium-based ceramic oxides such as barium stannate, barium cerate, barium tungstate, or barium molybdate, combined with an RFID chip, which minimizes signal attenuation by using a polymer-ceramic matrix and optional low-dielectric constant modifiers like magnesium aluminum silicate or talc, allowing for effective RF energy transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RFID device is embedded in an item made of conventional material, then the RFID device can be integrated into the item, but the material attenuates the RF signal between the RFID device and the RFID transceiver, limiting the detection range
Solution Approach 1:
The patent changes the dielectric properties of the embedding material by using barium-based ceramic oxides with specifically controlled dielectric constants (k) in the range of 2.0 to 10.0 and low dielectric loss tangents (d) in the range of 0.001 to 0.05. This parameter optimization minimizes RF signal attenuation and enables reliable communication at extended detection ranges while maintaining device integration
Solution Approach 2:
The patent employs composite materials consisting of barium-based ceramic oxide particles dispersed in a polymer matrix. This composite structure combines the low dielectric loss properties of the ceramic oxide with the mechanical flexibility and processability of the polymer, achieving both signal transmission performance and structural integrity for embedded RFID applications
2Loss of energy
If a low-dielectric constant modifier is added to the ceramic oxide material, then the dielectric constant is reduced improving RF transmission, but the manufacturing process becomes more complex
Solution Approach 1:
The patent modifies the ceramic oxide composition by incorporating low-dielectric constant modifiers such as magnesium aluminum silicate, magnesium silicate, zinc silicate, silica, or talc in controlled amounts. This compositional parameter change reduces the overall dielectric constant of the material while maintaining structural stability and enabling standard ceramic processing techniques
Solution Approach 2:
The patent creates a multi-phase composite ceramic oxide material where barium-based ceramic oxide particles are combined with low-dielectric constant modifier particles in a polymer matrix. This composite approach achieves reduced dielectric loss through material composition optimization while maintaining compatibility with conventional molding and sintering processes
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 solution enhances the detection range of RFID devices by reducing dielectric loss, ensuring reliable communication between the RFID chip and transceiver across various frequency ranges.
Implementation Method 1
low-dielectric loss barium-based ceramic oxides such as barium stannate, barium cerate, barium tungstate, or barium molybdate
Data Source
AI summary
An RFID chip is embedded in a device having a body that includes a low-dielectric loss material including at least one of barium stannate, barium cerate, barium tungstate and barium molybdate.