Elevated Feed Antenna Using a Slot-Free Conductive Enclosure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless devices with conductive enclosures face challenges in antenna functionality due to the need for slots that compromise water and drop test reliability when filled with non-conductive materials.
Innovation Solution
An antenna architecture that utilizes a fully intact conductive enclosure and a non-conductive bottom layer, where the antenna is connected directly to the metallic enclosure, and the antenna feed structure is elevated to the bottom layer using laser direct structuring to create conductive portions, allowing the metal enclosure to act as a radiating element without requiring slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slots are cut into the conductive enclosure to enable antenna functionality, then antenna performance is improved, but water and drop test reliability deteriorates due to the need to fill slots with non-conductive materials
Solution Approach 1:
The patent extracts the antenna function from the traditional slot-based implementation and relocates it to the bottom layer of the device. By placing the antenna on the bottom layer and using the conductive enclosure as a radiating element, the need for slots in the enclosure is eliminated, thereby maintaining water and drop test reliability while preserving antenna functionality.
Solution Approach 2:
The patent merges the conductive enclosure with the antenna system by using the enclosure itself as a radiating element. The enclosure is electrically connected to the antenna feed structure, combining the protective housing with the antenna function, thus eliminating the need for separate slots and maintaining both reliability and antenna performance.
2Reliability
If the antenna feed structure is elevated to the bottom layer using laser direct structuring, then LTE low-band antenna performance and bandwidth are improved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces traditional mechanical methods of creating conductive portions (such as drilling, machining, or applying conductive paint) with laser direct structuring. This laser-based process directly creates conductive portions on the bottom layer, enabling precise electrical connections for the elevated feed structure without complex mechanical tooling or multiple assembly steps.
Solution Approach 2:
The patent changes the manufacturing approach by using laser direct structuring to create conductive portions with specific electrical and physical properties. By controlling laser parameters (power, speed, pattern), the process achieves the required conductivity and geometric precision for antenna feeding, simplifying the overall manufacturing compared to traditional multi-step processes.
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 solution enhances LTE low-band antenna performance and provides wider bandwidth while maintaining environmental sealing and durability.
Implementation Method 1
the antenna feed structure is elevated to the bottom layer using laser direct structuring to create conductive portions
Data Source
AI summary
The disclosed system may include a housing that includes a non-conducting substrate and a conductive enclosure that at least partially surrounds the non-conducting substrate. The system may also include an antenna disposed on the non-conducting substrate of the housing. Still further, the system may include a direct electrical connection between the antenna and a first portion of the conductive enclosure. Moreover, the system may include an antenna feed electrically connected to a separate conductive portion on the non-conducting substrate. The separate portion of the non-conducting substrate may be electrically connected to a second portion of the conductive enclosure. Various other apparatuses, wearable electronic devices, and methods of manufacturing are also disclosed.