Decoupled Antenna System for Medium State Variability Detection
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Solution Overview
Problem
Existing technologies face challenges in determining variability in the state of a medium, such as temperature changes or mixing efficiency, particularly in industrial processes and medical monitoring, where precise monitoring is crucial.
Innovation Solution
A sensor system utilizing non-optical frequencies in the radio or microwave frequency bands to monitor variability in a medium. The system includes decoupled transmit and receive antennas, which minimize direct electromagnetic interference, allowing for accurate detection of changes in the medium's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional optical methods are used to monitor medium state variability, then measurement capability is limited by optical absorption and scattering, but the system complexity and cost increase when attempting to overcome these limitations
Solution Approach 1:
The patent replaces optical detection methods with electromagnetic sensing at radio and microwave frequencies. This substitution allows penetration through media that are opaque or highly scattering to optical wavelengths, thereby improving measurement precision without requiring complex optical correction systems. The electromagnetic sensors directly detect dielectric property changes caused by temperature and composition variations.
Solution Approach 2:
The patent changes the operating frequency parameter from optical to radio/microwave ranges. This parameter change enables the sensing system to operate in frequency bands where the medium has different electromagnetic properties, specifically lower absorption and scattering losses, thereby improving detection capability while maintaining relatively simple system architecture.
2Power
If transmit and receive antennas are closely coupled for efficient signal transmission, then signal strength is improved, but direct electromagnetic interference between antennas increases and obscures the medium's response signal
Solution Approach 1:
The patent employs asymmetric antenna geometries where the transmit antenna and receive antenna have deliberately different physical configurations. This asymmetry creates directional radiation patterns and impedance characteristics that reduce direct coupling between the antennas while maintaining adequate signal strength through the medium. The different geometries ensure that the receive antenna is less sensitive to direct transmit antenna radiation while remaining sensitive to the medium's response.
Solution Approach 2:
The patent uses the medium itself as an intermediary in the electromagnetic signal path. By positioning the antennas such that the medium forms a significant portion of the signal path, the system ensures that the dominant signal component detected by the receive antenna comes from the medium's response rather than direct antenna coupling. The medium acts as a mediator that transforms the transmit signal into a detectable response signal.
3Speed
If sampling rate is increased to capture fast transient variations in medium state, then temporal resolution is improved, but data processing load and power consumption increase
Solution Approach 1:
The patent employs periodic sampling of the electromagnetic signal at optimized intervals rather than continuous high-rate sampling. The sampling rate is selected to capture the essential transient variations in medium state while allowing for signal averaging and filtering between samples. This periodic approach maintains adequate temporal resolution for detecting mixing and temperature changes while significantly reducing the computational burden and power consumption associated with data processing.
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 system effectively monitors and determines variability in the medium's state over time, enabling precise control of industrial processes and medical monitoring applications, ensuring optimal conditions and efficiency.
Implementation Method 1
A sensor includes at least one transmit antenna that functions to transmit a generated transmit signal in a radio or microwave frequency range of the electromagnetic spectrum into a medium being monitored for variability in state, and at least one receive antenna that functions to detect a response resulting from transmission of the transmit signal by the transmit antenna into the medium
Data Source
AI summary
Systems for determining a variability in a state of a medium include one or more transmit elements or antennas and one or more receive elements or antennas which are relatively decoupled from one another. The transmit and receive elements or antennas can be less than 95% coupled to one another. The system also includes a transmit circuit configured to generate a transmit signal to be transmitted, which is in a radio or microwave frequency range of the electromagnetic spectrum. The system also includes a receive circuit configured to receive a response detected by the at least one receive antenna resulting from transmission of the transmit signal into the medium. The system includes a processor configured to determine the variability in the state of the medium based on processing of the response over time. The variability can further be used to direct notifications or automated actions.