Smart Meter Cover With Integral Untethered Antenna Elements
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Solution Overview
Problem
Existing embedded antennas in utility meters suffer from performance degradation due to proximity to noise sources within the meter electronics, and they often require expensive coaxial cables and connectors, limiting their efficiency and reliability for wireless communications.
Innovation Solution
An untethered antenna design is implemented within the dielectric cover of utility meters, with resonant structures formed using insert-mold or heat staking processes, eliminating the need for coaxial cables and connectors by making electrical connections through the dielectric cover, and optimizing antenna placement to minimize noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is mounted close to the meter electronics, then the antenna is well protected within the meter housing, but the radio frequency performance degrades due to noise interference from digital circuits
Solution Approach 1:
The patent positions the antenna on the front face of the meter housing, utilizing the external surface dimension rather than embedding it within the internal space near electronics. This spatial repositioning in a different dimension allows the antenna to maintain proximity to the meter for security while being physically separated from noise-generating digital circuits, thus resolving the contradiction between protection and noise interference.
2Adaptability or versatility
If discrete antenna elements with coaxial cables are used, then the antenna can be positioned flexibly, but the device complexity and cost increase due to additional connectors and cable management
Solution Approach 1:
The patent integrates the antenna structure directly into the meter housing, combining what were previously separate components (antenna element, housing, mounting structure) into a unified integrated assembly. This merging eliminates the need for discrete coaxial cables, connectors, and associated mounting hardware, thereby reducing device complexity while maintaining positioning flexibility through the integrated design.
Solution Approach 2:
The patent extracts and eliminates the coaxial cable and connector components from the antenna system. By removing these intermediary elements and directly integrating the antenna into the housing structure, the design simplifies the overall system while retaining the essential function of wireless communication.
3Strength
If the antenna is embedded deep within the meter housing, then it is well protected from damage, but the radiating efficiency decreases due to proximity to noise sources
Solution Approach 1:
The patent relocates the antenna from the internal three-dimensional space near electronics to the external surface dimension of the front face. This dimensional transition allows the antenna to maintain physical protection through its integration with the housing structure while being positioned away from noise sources, thereby preserving radiating efficiency.
Solution Approach 2:
The patent applies different functional qualities to different regions of the meter housing: the front face area is optimized for antenna placement with appropriate material properties for RF transmission, while internal regions continue to provide structural protection. This localized quality differentiation allows the antenna to be protected while maintaining radiating efficiency.
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 design enhances radio frequency performance by isolating the antenna from noise sources, reduces costs by eliminating cable connections, and supports multiple communication frequencies and standards, while maintaining the antenna within the meter cover for anti-tamper and vandal-proofing purposes.
Implementation Method 1
mounting a portion of the resonant structure of the antenna on the inside of the front cover of the meter
Implementation Method 2
resonant structures formed using insert-mold or heat staking processes
Data Source
AI summary
Method and apparatus for mounting and locating untethered embedded antenna elements in the dielectric cover of electric utility meters configured for but not limited to wireless remote one way or two way radio communications for automated metering applications such as remote meter reading, remote connect/disconnect, home area networking, meter equipment firmware downloads, load management or locations based services. A multiplicity of untethered integral antenna elements and topologies may be located within a replacement dielectric cover for a direct-connect cable free or cable connection to a radio or microwave modem. Also described is a method and apparatus for retro-fitting the antenna elements on the inner face of an existing utility meter dielectric cover.