Rolled-Device Antenna Cavity Structure for Stable Radiation
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Solution Overview
Problem
The radiation performance of antennas in electronic devices with deformable structures is degraded when the device is in a rolled state due to the conductive materials used in the housings, which interfere with the radiation pattern.
Innovation Solution
Incorporating a cavity with a slit in one housing and a wireless communication circuit connected to a point within the cavity, allowing the antenna to form a radiation pattern through the cavity structure, reducing interference from conductive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the housings are made of conductive material to reinforce rigidity, then the structural strength is improved, but the radiation performance of the antenna is degraded in the rolled state
Solution Approach 1:
The housing is segmented into a first housing containing the antenna and a second housing that can be folded relative to the first housing. This segmentation allows the antenna to be isolated in a dedicated space where its radiation pattern is not disrupted by conductive materials, while the overall device maintains rigidity through the folded housing structure.
Solution Approach 2:
The antenna radiation pattern is redirected from the lateral direction (where conductive housing materials would interfere) to the longitudinal direction (along the folded housing structure). This dimensional change in radiation direction allows the antenna to maintain performance despite the presence of conductive materials in the housing.
2Ease of operation
If the housings are folded to create a rolled state for portability, then the ease of operation is improved, but the radiation pattern of the antenna is degraded due to interference from peripheral conductive housings
Solution Approach 1:
The device is divided into separable housing sections with the antenna confined to a specific compartment. This segmentation ensures that when the device is folded for portability, the antenna's electromagnetic field is contained within its designated space and not disrupted by adjacent conductive housing elements.
Solution Approach 2:
A non-conductive material is introduced as an intermediary between the antenna and the conductive housing walls. This intermediary layer prevents electromagnetic interference from the conductive housing while allowing the housing to maintain its folded configuration for portability.
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
Ensures consistent radiation performance in both flat and rolled states by forming the radiation pattern inside the cavity, minimizing interference from peripheral conductors.
Implementation Method 1
a wireless communication circuit disposed in an inner space of at least one housing among the plurality of housings and electrically connected to a first point within the cavity, wherein the wireless communication circuit may be configured to form a radiation pattern through the cavity structure
Data Source
AI summary
An electronic device is provided. The electronic device includes at least one hinge device, a plurality of housings that are foldably connected to each other via the at least one hinge device and configured to at least partially define a rolling space in a rolled state, a flexible display supported by the plurality of housings and disposed to be visible from the outside in the rolled state, a cavity defined to have a predetermined spatial volume through a conductive material in a first housing among the plurality of housings, wherein the cavity includes a slit that is at least partially connected to the outside, and a wireless communication circuit disposed in an inner space of at least one housing among the plurality of housings and electrically connected to a first point within the cavity, wherein the wireless communication circuit may be configured to form a radiation pattern through the cavity structure.