Thin Wire Antenna for Lighting Control Devices
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Solution Overview
Problem
Traditional antenna configurations for wireless lighting systems face challenges in compliance with government regulations, aesthetics, and durability, particularly due to the need for multiple variants and susceptibility to damage during installation.
Innovation Solution
A thin wire antenna assembly with a shape memory alloy, such as nitinol, connected to a coaxial cable and a removable RF connector (e.g., U.FL, IPEX) that can be easily attached to a printed circuit board, allowing for flexible frequency operation and reduced risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hard wired antennas are used to comply with government regulations, then RF compliance is achieved, but device complexity increases due to multiple variants and susceptibility to damage during installation
Solution Approach 1:
The antenna system is divided into separate modular components: a removable RF connector and the antenna element itself. This segmentation allows the antenna to be easily replaced or reconfigured without replacing the entire assembly, reducing damage impact and simplifying compliance with different RF regulations through connector variants rather than complete antenna redesigns.
Solution Approach 2:
The RF connector is designed to be universal, supporting multiple frequency bands and antenna configurations through a single standardized interface. This multi-functionality eliminates the need for multiple specialized connectors, reducing device complexity while maintaining compliance with various government RF regulations across different applications.
2Reliability
If antennas are made durable to resist damage during installation, then reliability improves, but ease of manufacture deteriorates due to specialized handling requirements
Solution Approach 1:
The antenna element is pre-attached to a protective RF connector housing that cushions and protects it during handling and installation. This prior protection prevents damage without requiring specialized handling procedures or complex manufacturing processes, as the protective structure is integrated into the standard connector assembly.
Solution Approach 2:
The RF connector serves as an intermediary protective element between the fragile antenna element and the external environment during installation. This mediator absorbs mechanical stresses and protects the antenna from damage while maintaining simple, standard manufacturing processes for both the connector and antenna components.
3Ease of repair
If removable RF connectors are used for easy replacement, then ease of repair improves, but manufacturing precision requirements increase for reliable connections
Solution Approach 1:
The RF connector incorporates dynamic self-adjusting features such as spring-loaded contacts and flexible positioning elements that automatically compensate for minor manufacturing tolerances during assembly. This dynamic compensation maintains reliable electrical connections without requiring extremely tight manufacturing precision, while still enabling easy removal and replacement of the antenna element.
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 enables compliant, aesthetically pleasing, and durable RF communication in lighting systems by minimizing RF interference and allowing easy antenna replacement, thus addressing regulatory and performance issues while maintaining RF performance.
Implementation Method 1
The wire antenna may include a shape memory alloy. In examples of this concept, the shape memory alloy is nitinol
Data Source
AI summary
An antenna assembly includes a radio frequency (RF) connector connected to a first end of a coaxial cable and a wire antenna attached to a second end of the coaxial cable. The wire antenna may be made of a shape memory alloy, such as nitinol. Examples of RF connectors include U.FL, IFEX, WAX, IPX, AMC, MHF and UMCC connectors that allow the wire antenna to be removably attached to a printed circuit board (PCB) of a lighting control device and to avoid hardwiring the antenna to the PCB. The device that includes the antenna assembly may be incorporated into a luminaire for wireless control of the luminaire. The lighting control device may be installed within the luminaire, such that the wire antenna is positioned between a light source and a diffuser. A number of such luminaires may be combined to provide an intelligent lighting system.