RF-Array Resonant Tuning via Camera-Based Impedance Analysis
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Solution Overview
Problem
Existing RF systems with RF-arrays of antenna elements face challenges in efficiently adjusting operational electromagnetic settings, particularly for flexible arrays that deform when positioned around a patient, requiring extensive user interaction for accurate resonant tuning and impedance matching.
Innovation Solution
An RF system comprising an RF-array of antenna elements, a regulating arrangement to adjust impedances, a camera system to acquire image information, and an analysis module to derive operational settings such as resonant tuning, decoupling, and impedance matching from the image information, allowing for automatic adjustment without user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of impedance settings is used for RF-array tuning, then measurement precision can be achieved, but device complexity and time consumption increase significantly
Solution Approach 1:
The system performs self-adjustment by automatically capturing images of the RF-array, extracting geometric information, calculating impedance settings, and adjusting the antenna elements without requiring external measurement devices or manual intervention. The RF-array itself provides the measurement data through its visual geometric configuration.
Solution Approach 2:
The patent replaces traditional electrical measurement systems (network analyzers, impedance meters) with an optical imaging system (camera) that captures geometric information. The mechanical/optical measurement of positions is substituted for electrical measurement of impedance, simplifying the overall system while maintaining measurement capability.
2Measurement precision
If extensive user interaction is required for resonant tuning, then tuning accuracy can be achieved, but productivity and workflow efficiency decrease
Solution Approach 1:
The system pre-calculates the impedance settings based on the captured geometric configuration of the RF-array before actual resonant tuning is performed. This preliminary determination of settings eliminates the need for iterative manual adjustment during the tuning process, significantly improving workflow efficiency while maintaining accuracy.
Solution Approach 2:
The system establishes a feedback loop where the camera continuously monitors the RF-array configuration, the analysis module processes the geometric data, and the regulating arrangement adjusts impedance settings accordingly. This closed-loop feedback system automatically maintains optimal tuning without requiring user intervention.
3Reliability
If traditional impedance adjustment methods are used, then operational settings can be derived, but loss of time occurs due to manual intervention requirements
Solution Approach 1:
The system automatically performs the entire tuning process from image capture through impedance calculation to final adjustment without requiring external measurement devices or manual intervention, eliminating time losses associated with traditional methods while maintaining reliable operational settings.
Solution Approach 2:
The camera system continuously monitors the RF-array configuration, and the analysis module continuously processes geometric data to maintain up-to-date impedance settings. This continuous operation eliminates interruptions and time losses associated with periodic manual re-tuning, ensuring operational settings remain accurate throughout use.
Data Source
AI summary
A radio frequency (RF) system comprises an RF-array of antenna elements, a regulating arrangement to tune the antenna elements' impedances and a camera system to acquire image information of the RF-array. An analysis module is provided to derive operational settings such as resonant tuning settings, decoupling and impedance matchings of the antenna elements' impedances from the image information. The image information also represents the actual impedances and resonant properties of the RF-array. From the image information appropriate impedance settings can be derived that are the tuning parameters to render the RF-array resonant.