Rotating Shaft Antenna Radiator for All-Metal Electronic Devices
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Solution Overview
Problem
All-metal shells in electronic devices cause a shielding effect that narrows the bandwidth of antennas, particularly LTE antennas, and deteriorate their performance, while conventional solutions like grooves or slits compromise the device's strength and appearance, and increase production costs.
Innovation Solution
The electronic device incorporates a rotating shaft structure with metal shafts arranged between two bodies, forming an antenna radiator that maintains performance regardless of the bodies' rotation, enhancing strength and appearance while reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If an all-metal shell is used in electronic devices, then the appearance and quality are improved, but the antenna radiation is shielded causing narrow bandwidth and deteriorated performance
Solution Approach 1:
The patent introduces a plastic insert as an intermediary component between the metal shell and the antenna. This plastic insert acts as a mediator that prevents the harmful shielding effect of the metal shell on the antenna radiation, while still allowing the device to maintain its all-metal appearance. The plastic material is strategically placed to create an electromagnetic isolation layer that does not compromise the aesthetic quality or structural integrity of the device.
2Reliability
If a groove or slit is provided on the metal shell to form an antenna radiator, then the antenna performance is improved, but the overall strength and appearance are affected and production cost increases
Solution Approach 1:
Instead of modifying the metal shell itself with grooves or slits, the patent uses a plastic insert as an intermediary that achieves the same antenna radiation function without compromising the metal shell's strength. The plastic insert is designed to serve as the antenna radiator while the metal shell remains intact, preserving both structural integrity and appearance.
Solution Approach 2:
The patent segments the device structure into distinct functional zones: the metal shell for structural support and appearance, the plastic insert for antenna radiation function, and the internal components. This segmentation allows each part to optimize its specific function without interfering with others, eliminating the need to compromise the metal shell's strength for antenna performance.
3Reliability
If a groove or slit is provided on the metal shell to form an antenna radiator, then the antenna performance is improved, but the production cost increases
Solution Approach 1:
The patent merges the antenna radiation function with a plastic insert that is already part of the device structure (such as a structural component or cover). By combining multiple functions into a single component, the need for additional antenna-specific modifications to the metal shell is eliminated, thereby reducing production complexity and cost while maintaining antenna performance.
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 configuration ensures the antenna's performance is not affected by the rotation of all-metal shells, improving the device's overall strength and appearance while minimizing production costs.
Implementation Method 1
an antenna radiator including a plurality of metal shafts electrically coupled to each other and provided in an interspace between the first shaft and the second shaft
Data Source
AI summary
An electronic device includes a first body, a second body, and a rotating shaft structure connected to the first body and the second body. The rotating shaft structure includes a first shaft and a second shaft arranged opposite to each other and fixedly connected to the first body and the second body. The rotating shaft structure further includes an antenna radiator including a plurality of metal shafts electrically coupled to each other and provided in an interspace between the first shaft and the second shaft.