Conductive Tape Shielding With Slit for Metal Frame Antennas
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Solution Overview
Problem
The use of metal frames in electronic devices as antennas can lead to increased coupling factors with adjacent metal dielectrics, resulting in reduced antenna efficiency.
Innovation Solution
Incorporating a conductive tape with a slit near the segment of the metal frame to block radio signals from reaching sensitive components, while allowing radio signal transmission and reception at the frame's outer rim.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal back case is used to provide structural support and aesthetic appearance, then structural strength and appearance are improved, but electromagnetic wave shielding capability deteriorates due to signal penetration through gaps
Solution Approach 1:
The shielding assembly divides the back case into multiple segments: a metal back case portion providing structural support, and a shielding portion (mesh or sheet) providing electromagnetic wave blocking. This segmentation allows each part to fulfill its specific function without compromising the other.
Solution Approach 2:
The shielding assembly uses composite structure combining metal material for mechanical strength and mesh or sheet material for electromagnetic shielding. The composite design integrates materials with different properties to simultaneously achieve structural integrity and signal blocking capability.
2Object-affected harmful factors
If shielding portions are added to block electromagnetic waves, then electromagnetic wave shielding capability is improved, but device complexity increases due to additional assembly components
Solution Approach 1:
The shielding portion is merged with the metal back case to form an integrated assembly. The shielding mesh or sheet is positioned within recesses of the metal back case, creating a unified structure that reduces the number of separate components and simplifies assembly while maintaining effective electromagnetic wave blocking.
Solution Approach 2:
The metal back case serves multiple functions: providing structural support, maintaining aesthetic appearance, and housing the shielding portion for electromagnetic wave blocking. This multi-functionality reduces the need for separate dedicated shielding components, thereby simplifying the overall assembly.
3Object-affected harmful factors
If mesh structures with small hole densities are used for shielding, then electromagnetic wave blocking is improved, but manufacturing precision requirements increase
Solution Approach 1:
The shielding assembly optimizes the mesh parameters including hole density,孔径 size, and pattern distribution to achieve effective signal blocking. By carefully selecting and adjusting these parameters, the design balances electromagnetic wave shielding performance with manufacturability, avoiding excessively tight tolerances while maintaining adequate signal protection.
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
Improves antenna performance by minimizing interference and maintaining signal integrity.
Implementation Method 1
a shielding assembly for an electronic device. The shielding assembly may include a metal back case and a shielding portion positioned between a camera module and a second sensor module
Implementation Method 2
a second adhesive layer positioned between the shielding portion and the metal back case
Data Source
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AI summary
An electronic device includes a display panel, a printed circuit board, a display driver integrated circuit (DDI), and a conductive tape covering a metal housing. The electronic device includes the DDI electrically coupled to the display panel and the printed circuit board, and configured to control driving of the display panel, a frame made of a metal material along an outer rim of the electronic device, and a conductive tape provided to cover the DDI between the DDI and the frame so as to block a radio signal from being transmitted to the DDI. The frame includes one or more segments made of a non-metallic material to transmit and receive the radio signal at any position of the outer rim. The conductive tape includes a slit facing the one or more segments, and having a predetermined area.