Composite Middle Frame Plating for Lightweight Antenna Integrity
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Solution Overview
Problem
Existing electronic devices face a challenge in reducing weight while maintaining antenna functionality, as materials like plastics with high strength and toughness, such as carbon fiber reinforced resin composites, cause dielectric constant and loss tangent issues that affect antenna performance.
Innovation Solution
A middle frame assembly using a carbon fiber reinforced resin composite material base body with a metal plating layer on its surface, ensuring the metal plating layer's thickness and resistivity match those of traditional metals to maintain antenna performance, and optionally incorporating a protective layer to prevent detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If plastic materials with high strength and toughness (such as carbon fiber reinforced resin composites) are used to replace metal alloys in the middle frame, then the weight of the electronic device is reduced, but the dielectric constant and loss tangent increase, affecting antenna performance
Solution Approach 1:
The patent uses a composite structure consisting of a carbon fiber reinforced resin composite material base body combined with a metal plating layer. This composite material approach allows the middle frame to benefit from the low weight of plastic materials while the metal plating layer compensates for the poor electromagnetic properties, thereby maintaining antenna performance
Solution Approach 2:
The patent changes the physical and chemical parameters of the middle frame by adding a metal plating layer with specific thickness and resistivity characteristics. The metal plating layer's parameters are designed to mimic traditional metal middle frames, ensuring that the electromagnetic environment for antennas remains consistent despite the use of plastic base material
2Reliability
If a metal plating layer is added on the surface of the carbon fiber reinforced resin composite material base body to maintain antenna performance, then the electromagnetic properties are improved, but the manufacturing complexity increases
Solution Approach 1:
The metal plating layer is applied in advance on the surface of the carbon fiber reinforced resin composite material base body before final assembly. This preliminary action ensures that the electromagnetic properties are established early in the manufacturing process, simplifying subsequent assembly steps
Solution Approach 2:
The patent merges the structural function of the carbon fiber reinforced resin composite material base body with the electromagnetic shielding function of the metal plating layer into a single integrated middle frame component, reducing the number of separate parts and simplifying the overall structure
3Reliability
If the metal plating layer thickness is increased to better shield electromagnetic waves, then the antenna performance is improved, but the weight reduction benefit is diminished
Solution Approach 1:
The patent optimizes the thickness parameter of the metal plating layer to achieve the minimum necessary shielding effect. By carefully controlling the thickness within a specific range, the design achieves adequate electromagnetic shielding while minimizing the additional weight compared to the plastic base material
Solution Approach 2:
The metal plating layer is applied selectively on specific surfaces of the carbon fiber reinforced resin composite material base body where electromagnetic shielding is most needed, rather than uniformly throughout the entire structure. This localized approach maintains antenna performance while minimizing weight
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
The solution achieves a significant weight reduction in electronic devices without compromising antenna functionality by using a carbon fiber reinforced resin composite material with a metal plating layer that mimics the properties of traditional metals, thus maintaining antenna performance and structural integrity.
Implementation Method 1
the metal plating layer compounded on the surface of the carbon fiber reinforced resin composite material base body resolves problems of a wave absorption effect
Implementation Method 2
the metal plating layer compounded on the surface of the carbon fiber reinforced resin composite material base body resolves problems of a wave absorption effect and a PIM
Data Source
AI summary
Disclosed is a middle frame assembly, including a middle plate and a frame disposed around an outer edge of the middle plate, where the middle plate includes a first carbon fiber reinforced resin composite material base body and a first metal plating layer compounded on a surface of the base body. Some embodiments of this application further provide a preparation method for a middle frame assembly and an electronic device in the middle frame assembly. Some embodiments of this application use a carbon fiber reinforced resin composite material as a middle plate base body of the middle frame assembly.