Back Cover Antenna Structure for Narrow Frame Design
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Solution Overview
Problem
Current notebook computer designs face challenges in achieving a narrow frame while maintaining a metal body, as metal shielding affects antenna performance and internal noise interference, and relocating antennas to the top side complicates frame design and reduces display panel space.
Innovation Solution
A back cover with a metal body featuring a T-shaped first radiator, a second radiator, and a ground radiator forms an antenna structure, allowing the metal body to function as the antenna, eliminating the need for a substrate and enabling a narrow frame design by integrating the antenna directly into the metal body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the antenna is set inside the system, then the metal body can be used, but the antenna performance is affected by shielding effect and internal noise
Solution Approach 1:
The antenna structure is extracted from the internal system and integrated into the back cover metal body itself. The metal body is designed with specific radiator patterns (first radiator in groove, second radiator adjacent to groove, ground radiator as remaining portion) that directly function as antenna elements, separating the antenna function from the shielding structure while maintaining the metal body's aesthetic and structural role.
Solution Approach 2:
The metal body serves multiple functions simultaneously: it provides the structural frame, aesthetic appearance, electromagnetic shielding, and antenna radiation elements. The radiators are formed directly from portions of the metal body, allowing the same material to fulfill both shielding and radiation purposes without compromising either function.
2Reliability
If the antenna is moved to the top side of the panel, then the antenna is supported by a circuit board, but the frame space of the display panel cannot be reduced
Solution Approach 1:
The antenna structure transitions from being positioned in the horizontal plane (top side of panel) to being integrated into the vertical/back surface (back cover metal body). This dimensional shift allows the antenna to occupy space on the back cover rather than competing for frame space, enabling narrow frame design while maintaining antenna functionality.
3Reliability
If a substrate is used to carry the antenna structure, then the antenna can be supported, but the thickness of the electronic device increases
Solution Approach 1:
The antenna structure is merged with the back cover metal body, eliminating the need for a separate substrate. The radiators are formed directly from metal portions (first radiator in groove, second radiator adjacent to groove, ground radiator as remaining metal body), integrating the antenna support function into the existing structural component and reducing overall device thickness.
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 design reduces the thickness of the electronic device, allows for a narrow frame, and improves antenna performance with independent control of high and low-frequency bands, achieving good return loss and efficiency for dual-frequency operation.
Implementation Method 1
The first radiator, the second radiator, and the ground radiator cooperatively serve as an antenna structure
Data Source
AI summary
A back cover includes a metal body having a first side, a second side, and a groove that is formed at the first side. The metal body further has a first radiator, a second radiator, and a ground radiator. The first radiator is disposed in the groove, and has a main portion and a support portion that cooperatively form a T-shape. The main portion includes a feeding end adjacent to a closed end of the groove. The second radiator is adjacently connected to the groove and is defined by the first and second sides, and an edge of the groove. The ground radiator is formed by a portion of the metal body excluding the first and second radiators. The second radiator and the support portion are connected to the ground radiator. The first and second radiators, and the ground radiator are serve as an antenna structure.