3D Cavity Electromagnetic Wave Modulation for Multi-Device Sensing
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Solution Overview
Problem
Current methods for electromagnetic wave structure modulation lack efficiency in encoding and decoding information using frequency and phase shifts, particularly in high-frequency ranges, and struggle to handle multiple encoded devices simultaneously while providing accurate temperature and pressure sensing.
Innovation Solution
The use of a passive encoded device with three-dimensional electromagnetic wave-opaque structures within a cavity, combined with an interrogating device featuring a transceiver and decoder, which modulates and decodes electromagnetic waves by sweeping through frequency channels and analyzing phase and time shifts, enabling simultaneous reading of multiple encoded devices and temperature/pressure sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electromagnetic wave structure modulation is used for encoding information, then information can be stored and retrieved, but the method lacks efficiency in encoding and decoding particularly in high-frequency ranges
Solution Approach 1:
The patent transitions from two-dimensional surface modulations to three-dimensional electromagnetic wave-opaque structures within a cavity. This dimensional change enables more complex phase and frequency modulations, improving encoding efficiency while maintaining accuracy in high-frequency ranges through volumetric rather than surface-only interactions with electromagnetic waves.
Solution Approach 2:
The invention modifies physical parameters of the encoding structures including cavity dimensions, structure depth, width, spacing, and positioning. These parameter changes enable optimization of resonance frequencies and phase shifts, directly improving encoding/decoding efficiency and reliability across different frequency ranges by tuning structural parameters to match operating frequencies.
2Adaptability or versatility
If traditional electromagnetic wave modulation methods are used, then simple encoding is possible, but they struggle to handle multiple encoded devices simultaneously
Solution Approach 1:
The patent divides the encoding space into multiple independent cavities, each with its own resonant characteristics determined by cavity size, shape, and internal structures. This segmentation allows multiple devices to be encoded simultaneously on different frequency channels or with distinct phase signatures, enabling multi-device handling without increasing individual device complexity.
Solution Approach 2:
The cavity-based encoding structure serves multiple functions: it provides frequency encoding through resonance, phase encoding through path length variations, and enables multi-device differentiation through geometric variations. This multi-functionality allows a single device type to handle multiple encoding tasks simultaneously, improving adaptability without proportionally increasing complexity.
3Measurement precision
If frequency and phase shifts are used for encoding, then information can be modulated, but accurate temperature and pressure sensing is not provided
Solution Approach 1:
The patent incorporates materials that exhibit thermal expansion and contraction in response to temperature and pressure changes. These material property changes cause measurable shifts in cavity dimensions and electromagnetic resonance characteristics, enabling accurate temperature and pressure sensing through the same electromagnetic wave modulation mechanism used for information encoding, thus maintaining encoding efficiency while adding sensing capability.
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 effectively encodes and decodes information across various frequency ranges, including super high frequency, extremely high frequency, and terahertz frequencies, and allows for simultaneous reading of multiple devices, while providing accurate temperature and pressure measurements through material expansion and contraction effects.
Implementation Method 1
the three-dimensional projections modifies the controlling wave as it enters into the cavity and reflects the modified wave back to the interrogator
Implementation Method 2
The three-dimensional projections within the cavity determine the minor phase shifting, number of reflections, and/or times between reflections within the carrier signal
Implementation Method 3
the encoded devices can provide temperature and pressure information due to material expansion or contraction
Data Source
AI summary
Electromagnetic wave structure modulation apparatus comprises an encoded device that has an electromagnetic wave-transparent material having a three-dimensional volume and electromagnetic wave-opaque walls, and a plurality of electromagnetic wave-opaque projections projecting into the electromagnetic wave-transparent material. The apparatus further comprises an interrogating device that has a transceiver operable to transmit an electromagnetic wave into the electromagnetic wave-transparent material, the electromagnetic wave being modulated and reflected by the electromagnetic wave-opaque walls and projections, an antenna operable to receive the reflected electromagnetic waves, and a decoder operable to decode the received reflected electromagnetic waves.