Resonant Loop Antenna for Outlet RF Immunity
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Solution Overview
Problem
Existing electrical outlet control systems are inefficient in managing energy consumption, particularly with 'vampire' loads that continue to consume energy in standby mode, and require additional control devices for effective load management, increasing costs and complexity.
Innovation Solution
A controllable electrical outlet with a resonant loop antenna for RF signal reception, integrated load control circuit, and communication circuit to manage power delivery based on RF signals, reducing interference from plugged-in devices and eliminating the need for additional control devices by using RF signals for load control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional control systems are used to manage plug-in electrical loads, then energy consumption can be controlled, but additional control devices are required which increase system complexity and cost
Solution Approach 1:
The patent combines the control device functionality directly into the electrical outlet by integrating a microcontroller, RF receiver, and control circuitry into the outlet housing. This merging eliminates the need for separate external control devices while maintaining automated load management capabilities, thereby reducing system complexity without sacrificing automation extent.
Solution Approach 2:
The electrical outlet is designed to perform multiple functions: it provides standard electrical power delivery, receives and processes RF signals for wireless communication, detects occupancy through sensors, and controls connected loads. This multi-functionality consolidates what would traditionally require multiple separate devices into a single universal outlet unit, reducing overall system complexity.
2Ease of operation
If RF signals are used for communication in the outlet, then wireless control is enabled, but plugged-in devices may interfere with RF performance
Solution Approach 1:
The patent introduces a resonant loop antenna as an intermediary component that mediates between the RF communication needs and the presence of plugged-in devices. The antenna's resonant properties allow it to selectively receive desired RF signals while filtering out interference from connected devices, thereby maintaining reliable wireless control capability without sacrificing RF performance.
Solution Approach 2:
The outlet incorporates a tunable RF receiver that can adjust its operating parameters (frequency, sensitivity) to optimize communication while avoiding interference from plugged-in devices. By dynamically changing RF parameters, the system maintains reliable wireless control capability even in the presence of potential interferers.
3Reliability
If resonant loop antenna is used instead of monopole antenna, then RF performance is more immune to plugged-in devices, but antenna design complexity increases
Solution Approach 1:
The resonant loop antenna is designed with specific local characteristics (loop geometry, resonant frequency tuning) that are optimized for the outlet's specific environment and interference patterns. This localized optimization provides superior RF performance stability without requiring complex system-wide changes, as the enhanced reliability is achieved through targeted antenna design features rather than overall system complexity.
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 solution enhances energy efficiency by automatically managing 'vampire' loads and reducing overall system costs through simplified installation and operation, as it integrates load control directly into the outlet, minimizing the impact of plugged-in devices on RF performance and eliminating the need for additional control devices.
Implementation Method 1
The resonant loop antenna may comprise a feed loop electrically coupled to an RF communication circuit and a main loop magnetically coupled to the feed loop
Implementation Method 2
The RF performance of the controllable electrical outlet may be substantially immune to devices plugged into the receptacles (e.g., plugs, power supplies, control devices, etc.) due to the operation of the resonant loop antenna
Data Source
AI summary
A controllable electrical outlet may comprise a resonant loop antenna. The resonant loop antenna may comprise a feed loop electrically coupled to a radio-frequency (RF) communication circuit and a main loop magnetically coupled to the feed loop. The controllable electrical outlet may comprise one or more electrical receptacles configured to receive a plug of a plug-in electrical load and may be configured to control power delivered to the plug-in electrical load in response to an RF signal received via the RF communication circuit. The RF performance of the controllable electrical outlet may be substantially immune to devices plugged into the receptacles (e.g., plugs, power supplies, etc.) due to the operation of the resonant loop antenna. For example, degradation of the RF performance of the controllable electrical outlet may be less when the controllable electrical outlet includes the resonant loop antenna rather than other types of antennas.