Mesh Ground Plane Layout for Body-Blocked Sensor Antennas
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Solution Overview
Problem
Miniaturization of analyte sensor systems for improved comfort and ease of use often results in reduced communication or transmission ranges due to antennas being positioned closer to the body, leading to absorption of RF power and decreased efficiency.
Innovation Solution
Incorporating a conductive mesh ground plane between the body and antennas to reflect a portion of RF power away from the body, increasing the power radiated towards the display device and enhancing communication range and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the analyte sensor system is miniaturized for improved comfort and ease of use, then the device size is reduced, but the communication range is reduced due to antennas being positioned closer to the body
Solution Approach 1:
A mesh ground plane is introduced as an intermediary component between the antenna and the user's body. This mesh ground plane reflects RF power that would otherwise be absorbed by the body, redirecting it toward the display device. The mesh ground plane serves as a mediator that resolves the conflict between miniaturization and communication range by managing RF power distribution in the near-field environment.
2Volume of moving object
If the antenna is positioned closer to the body for miniaturization, then the device becomes more compact, but RF power is absorbed by the body leading to decreased transmission efficiency
Solution Approach 1:
The mesh ground plane converts the harmful effect of RF power absorption by the body into a beneficial reflection pattern. By strategically positioning the mesh ground plane, RF power that would be lost to body absorption is instead reflected toward the display device, transforming energy loss into useful transmission power and improving overall system efficiency.
3Loss of energy
If a traditional ground plane is used to improve antenna performance, then RF power reflection is enhanced, but the device size and complexity increase
Solution Approach 1:
The traditional solid ground plane is segmented into a mesh structure with interconnected conductive elements forming openings. This segmentation maintains the RF reflection functionality while reducing the overall material volume and device footprint. The mesh pattern provides sufficient electrical continuity for ground plane operation while occupying less space than a solid ground plane, thus resolving the contradiction between reflection effectiveness and device size.
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 mesh ground plane effectively increases the communication range of analyte sensor systems to 30 feet or more while maintaining bandwidth, despite miniaturization, by reflecting RF power and reducing absorption by the body.
Implementation Method 1
a second conductive portion configured to reflect, away from a body of the user, a portion of power radiated from the first conductive portion associated with transmission of at least the analyte data
Data Source
AI summary
Aspects of the present disclosure provide techniques for improving a communication range of an analyte sensor system. The analyte sensor system may include an analyte sensor configured to generate analyte data associated with analyte levels of a user of the analyte sensor system, a first conductive portion configured to transmit the analyte data to a communications device, a circuit board configured to operatively connect the analyte sensor with the first conductive portion, and a second conductive portion configured to reflect, away from a body of the user, a portion of power radiated from the first conductive portion associated with transmission of at least the analyte data.