An Ising Tag with a LiNbO3 Resonator for Temperature Threshold Sensing

INV-23061

Background:

Passive tag technology, essential for remote sensing in logistics, healthcare, and environmental monitoring, faces significant challenges despite advancements. These tags are valued for their cost-effectiveness and longevity but often struggle to perform reliably in changing environments. A key issue with current tags, like Subharmonic tags (SubHTs), is their dependence on consistent power to maintain sensitivity. This limits their effectiveness to stable environments, which is impractical for real-world applications where conditions vary. Fluctuating power levels lead to unreliable and inaccurate sensing data, underscoring the need for passive tags that can consistently perform well regardless of varying power inputs.

Description:

Northeastern researchers have developed Subharmonic tags that use a LiNbO3 resonator to maintain continuous sensing capabilities, ensuring they function reliably even when input power varies. Unlike traditional tags, this sensing platform is able to activate at specific temperatures, providing consistent performance in changing environments. The technology solves the problem of fluctuating power levels that limit other passive tags, making SubHTs versatile and reliable for real-world applications. These novel SubHTs have demonstrated their effectiveness in various tests, proving their suitability for a wide range of applications in logistics, healthcare, environmental monitoring, and beyond.

Benefits:

Enhanced continuous sensing: Provides reliable remote sensing without interruptions.
Consistent sensitivity: Maintains high sensitivity regardless of input power fluctuations.
Adaptability: Performs well in diverse and changing environments.
Temperature activation: Sensors activate based on specific temperatures for precise functionality.

Applications: