Hinge Antenna Switching for RF Signal Stability
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Solution Overview
Problem
Computing devices with full metal bodies pose a challenge in maintaining effective radio frequency communications as metal housings often block or attenuate antenna signals, and existing solutions for placing antennas at hinges result in varying performance based on hinge angles, particularly when the device is rotated beyond 180 degrees.
Innovation Solution
The implementation of two antennas, one on each hinge, with a switching mechanism that connects different antenna elements based on the hinge position, ensuring consistent performance across various angles from 0 to 360 degrees, thereby avoiding signal blockage by the device's body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If an antenna is placed on a metal housing, then the device structure is compact and premium, but the antenna signal is attenuated by the metal body
Solution Approach 1:
The antenna is extracted from the metal housing interior and relocated to the hinge area, specifically positioned on the hinge cover that can be rotated independently. This separation removes the antenna from the signal-blocking metal housing while maintaining the compact premium structure.
Solution Approach 2:
The hinge cover is made rotatable relative to the hinge body, allowing the antenna to dynamically change its position and orientation. This dynamic adjustment enables the antenna to maintain optimal signal transmission by rotating away from metal housing obstructions at different hinge angles.
2Area of stationary object
If an antenna is located at a hinge, then space is utilized on the full metal body, but the antenna performance varies dramatically with hinge angle
Solution Approach 1:
The hinge cover is designed to rotate independently from the hinge body, allowing the antenna mounted on the cover to dynamically adjust its orientation. This rotation capability compensates for the varying hinge angles, maintaining consistent antenna performance across the full range of motion from 0 to 360 degrees.
Solution Approach 2:
The solution adds a rotational degree of freedom in a different dimension - the hinge cover rotates around the hinge axis while the hinge itself provides the primary opening motion. This secondary rotational dimension allows the antenna to independently optimize its position regardless of the main hinge angle.
3Adaptability or versatility
If the hinge permits rotation over large angles including 360 degrees, then device versatility is improved, but antenna performance becomes highly variable
Solution Approach 1:
The rotatable hinge cover provides dynamic repositioning of the antenna throughout the 360-degree rotation range. As the hinge rotates to different angles, the cover can independently rotate to maintain optimal antenna orientation, ensuring signal stability across the entire versatile range of motion.
Solution Approach 2:
The antenna is pre-positioned on the rotatable hinge cover rather than fixed to the hinge body, preparing it in advance to automatically adjust to optimal positions as the hinge moves through its full rotation range, maintaining performance without intervention.
Data Source
AI summary
A method and apparatus for switching between two antenna elements in an electronic device having a hinge. A rotating element within the hinge has a coupling or contact brush that extends into contact with a first contact element connected to a first antenna element. Rotation of the hinge moves the coupling of coupled communication with the first contact element and into coupled communication with a second contact element, that connects to a second antenna element. The first and second antenna elements are provided on a hinge of an electronic device that may be moved from a closed position to a 360 degree open position or tablet position. The movement of the hinge switches between the two antenna elements to avoid blocking of the connected antenna(s) by the body of the electronic device.