Dynamic Antenna Polarization Configuration for IoT Backscatter
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Solution Overview
Problem
Current IoT devices require significant power and cost, making them unsuitable for large-scale, batteryless applications, and existing technologies like RFID struggle with polarization alignment issues affecting communication efficiency.
Innovation Solution
The implementation of a system that dynamically adjusts antenna polarization configurations in IoT devices using information from back-scattered illumination signals to optimize communication, allowing for multiple linear polarization configurations to be used based on energy levels and tag identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional IoT devices are used, then communication functionality is achieved, but power consumption and cost are too high for large-scale batteryless applications
Solution Approach 1:
The patent uses backscatter communication where passive tags copy the illuminator's signal by modulating the reflected signal. The passive tag does not generate its own signal but instead copies and modulates the incoming illumination signal, enabling ultra-low power operation while maintaining communication functionality
Solution Approach 2:
The patent dynamically adjusts the polarization configuration of the illuminator antenna based on the detected polarization of the passive tag. The system transitions from a static single-polarization configuration to a dynamic multi-polarization configuration, optimizing communication reliability by matching polarizations in real-time
2Productivity
If a fixed antenna polarization configuration is used, then device complexity is reduced, but communication efficiency decreases due to polarization misalignment
Solution Approach 1:
The patent implements a feedback mechanism where the illuminator detects the polarization of the passive tag's backscattered signal and uses this information to adjust its own antenna polarization configuration. This closed-loop feedback system optimizes communication efficiency while keeping the passive tag simple
Solution Approach 2:
The patent changes the polarization parameter of the illuminator antenna dynamically based on detected tag polarization. The system switches between different linear polarization configurations (e.g., horizontal, vertical, diagonal) to match the tag's polarization, optimizing signal strength without requiring complex hardware
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
This approach reduces power consumption and cost while improving communication efficiency by dynamically optimizing antenna polarization, enhancing the range and reliability of IoT device interactions.
Implementation Method 1
providing information associated with an illumination signal, transmitted by an illuminator, back-scatted from a tag and received by an antenna
Data Source
Figure 1A~1B
Figure 2
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AI summary
An apparatus, method and computer program is disclosed. The apparatus may comprise means for providing information associated with an illumination signal, transmitted by an illuminator, back-scatted from a tag and received by an antenna of the illuminator using a first linear polarization configuration. The apparatus may also comprise means for determining that a different antenna polarization is required at the illuminator for the tag. The apparatus may also comprise means for configuring the antenna of the illuminator to use a different one of a plurality of linear polarization configurations for the tag.