Antenna Mounting Structure Using Directional Foam Biasing
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Solution Overview
Problem
Existing head-mounted devices face challenges in securely mounting antennas without obstructing radio-frequency signals, as conductive structures within the device can block antenna signals, leading to unreliable wireless communications.
Innovation Solution
A unidirectional structural foam biasing member is used to mount the antenna, compressing preferentially along a specific axis and resisting compression orthogonal to it, ensuring the antenna is securely positioned against a curved display cover layer without lateral movement, thus avoiding signal obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is mounted in a location where antenna signals are not blocked by conductive structures, then wireless communication reliability is improved, but the antenna mounting becomes more complex and requires additional support structures
Solution Approach 1:
A non-conductive support member is introduced as an intermediary component to hold the antenna in a position that avoids signal blocking by conductive structures. The support member acts as a mediator between the antenna and the housing, providing mechanical support without interfering with RF signal propagation.
Solution Approach 2:
The antenna is extracted from conventional mounting locations near conductive structures and repositioned to a location where signals are not blocked. This extraction from the problematic area eliminates signal blocking while the support member enables this repositioning.
2Stability of the object's composition
If a biasing member is used to press the antenna against the display cover layer, then antenna positioning stability is improved, but the device structure becomes more complex
Solution Approach 1:
The biasing member is designed to automatically maintain antenna contact pressure against the display cover layer without requiring external adjustment mechanisms. The biasing member self-regulates to ensure consistent positioning and electrical contact, eliminating the need for additional complex positioning systems.
3Shape
If the antenna is mounted under the display cover layer, then the device profile is reduced and aesthetics are improved, but signal obstruction by the conductive display cover layer may occur
Solution Approach 1:
The non-conductive support member serves as an intermediary that allows the antenna to be positioned under the display cover layer while preventing signal obstruction. By providing mechanical support without electrical conductivity, it enables the antenna to maintain effective positioning beneath the conductive layer.
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 ensures reliable antenna placement and performance by preventing signal interference and maintaining consistent wireless communication, even during assembly and installation of other device components.
Implementation Method 1
A unidirectional structural foam biasing member is used to mount the antenna, compressing preferentially along a specific axis and resisting compression orthogonal to it
Implementation Method 2
A unidirectional structural foam biasing member is used to mount the antenna, compressing preferentially along a specific axis and resisting compression orthogonal to it
Data Source
AI summary
A head-mounted device may be worn on a head of a user. While the head-mounted device is being worn, optical modules in the head-mounted device may provide images to eye boxes located rearward of the head-mounted device. A forward-facing display on a front portion of the head-mounted device may be covered with a transparent housing portion forming a display cover layer. An antenna may be mounted in the device. An antenna support member may be coupled to the head-mounted housing. A biasing member such as a layer of foam may have first and second opposing surfaces characterized by surface normals. The foam may be characterized by an axis of preferential compression that is not parallel to the surface normals. The support member may press against the foam so that the antenna presses against an edge portion of the display cover layer or other overlapping dielectric layer.