External Antenna Insulation for Utility Meter RF Interference
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Solution Overview
Problem
Utility meters with internally mounted RF antennas face issues of radio frequency interference with electronics and conductors, leading to potential electric shock risks and increased costs, especially in large-scale operations.
Innovation Solution
An externally mounted antenna configuration with an antenna housing and non-conductive coatings to minimize RF interference and prevent electric conduction, where the antenna is positioned adjacent to the meter cover or embedded within it, and secured using grommets and hooks to ensure safety and efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is mounted under the cover of the utility meter, then the antenna is protected and integrated within the meter structure, but radio frequency interference with electronics and conductors occurs
Solution Approach 1:
The antenna is extracted from the internal mounting location under the meter cover and repositioned to an external location on the meter box. This separation removes the antenna from the harmful electromagnetic environment created by internal electronics and conductors, eliminating RF interference while maintaining protected integration through the external meter box mounting structure.
2Object-affected harmful factors
If alternative power supply or RF coupler is used for external antenna mounting, then safety is improved, but cost increases significantly
Solution Approach 1:
The patent employs an inexpensive RF coupler rather than costly alternative power supply systems or extensive shielding arrangements. This affordable component provides the necessary electrical isolation and safety features, enabling external antenna mounting without significantly increasing manufacturing costs, thus making the solution economically feasible for large-scale utility operations.
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 configuration enhances RF performance, reduces interference with metrology board components, and ensures safety by preventing electric shock, while maintaining efficient data transmission and network connectivity.
Implementation Method 1
Antennas allow transmission of data obtained from a metering circuit through the NIC to the network
Implementation Method 2
The antenna housing and non-conductive coatings or other non-conductive surfaces of the antenna cooperate to protectively insulate portions of the antenna
Data Source
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AI summary
The present technology discloses a utility meter with an externally-mounted antenna that is electrically insulated to prevent conduction outside of the meter. The antenna is coupled to a communication device that is positioned adjacent to an inside surface of a meter cover and that is configured to connect to a metrology board. The utility meter also comprises an antenna, having one or more leads for coupling with the communication device, the leads extending through openings in the meter cover. The communication device is advantageously positioned to minimize or eliminate radio frequency interference with the metrology board.