Conductive Frame Slot Antenna Layout for Compact Metal Devices
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Solution Overview
Problem
The increasing number of antennas in electronic devices, particularly in metal industrial design devices, leads to a significant reduction in available space due to the need for high structural compactness and larger battery capacity, which complicates the integration of slot antennas.
Innovation Solution
The implementation of a conductive frame with a first antenna unit that includes a first conductive layer, a second conductive layer, and a conductive connection portion, forming a cavity with a slot, allowing electromagnetic wave radiation without requiring a surface slot, and utilizing existing metal components like the metal rear cover and ground for the antenna unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a slot antenna is implemented using a traditional surface slot on a metal plate, then the antenna can radiate electromagnetic waves, but the metal plate integrity is compromised and manufacturing complexity increases
Solution Approach 1:
The patent merges the antenna structure with the conductive frame by forming the slot between the conductive frame and a conductive layer (such as the metal rear cover or display assembly metal layer). This integration eliminates the need for separate metal plates with surface slots, maintaining metal plate integrity while achieving electromagnetic wave radiation through the enclosed cavity structure.
Solution Approach 2:
The patent transitions from a two-dimensional surface slot on a metal plate to a three-dimensional enclosed cavity structure. The slot is formed in the thickness direction between the conductive frame and the conductive layer, creating a volumetric antenna structure that radiates electromagnetic waves without compromising surface integrity.
2Adaptability or versatility
If multiple antennas are added to cover more frequency bands, then communication functionality is improved, but the available space in the device is significantly reduced
Solution Approach 1:
The conductive frame serves multiple functions: it provides structural support for the device and simultaneously forms part of the antenna structure by enclosing cavities with conductive layers. This multi-functionality allows the same structural component to serve both mechanical and electromagnetic purposes, enabling multiple antennas without additional space consumption.
Solution Approach 2:
The patent nests the antenna cavity within the device's existing structural framework. The conductive frame and conductive layers that form the antenna cavity are integrated into the device's housing and component structure, allowing the antenna to be embedded within the existing volume rather than requiring separate dedicated antenna space.
3Reliability
If additional metal components are added to form the antenna structure, then the antenna functionality is achieved, but manufacturing costs increase and space is consumed
Solution Approach 1:
The patent combines the antenna structure with existing metal components such as the metal rear cover or the metal layer in the display assembly. By using these existing components as part of the antenna structure, no additional metal components need to be manufactured or assembled, reducing both manufacturing costs and component quantity.
Solution Approach 2:
The existing metal components (rear cover, display assembly metal layer) serve dual purposes: their original structural or aesthetic functions plus their new function as antenna elements. This self-service approach allows the same components to provide both mechanical support and electromagnetic radiation functionality without requiring separate dedicated antenna components.
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 manufacturing costs, saves space, and enhances signal processing reliability and communication quality by reusing existing metal components and maintaining the integrity of the device's structure.
Implementation Method 1
the first conductive layer and the first conductive frame are spaced apart to form a first slot of the first cavity. In this way, the first antenna unit may radiate or receive an electromagnetic wave through the first slot
Data Source
AI summary
An electronic device includes a conductive frame and a first antenna unit. The conductive frame is disposed around a periphery of the electronic device. The first antenna unit includes a first conductive layer and a second conductive layer spaced apart in a thickness direction of the electronic device; a conductive connection portion is configured to connect the first conductive layer and the second conductive layer; and a first conductive frame, is a part of the conductive frame. The conductive connection portion, the first conductive frame, the first conductive layer, and the second conductive layer enclose a first cavity, and the first conductive layer and the first conductive frame are spaced apart to form a first slot of the first cavity.