Mobile Terminal Metal Frame Antenna Integration
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Solution Overview
Problem
The design of mobile terminals with metal frames poses challenges for antenna performance due to radiation interference, leading to high costs and complex testing processes, especially when trying to integrate the metal frame with the antenna or adjust its size for optimal resonance and radiation.
Innovation Solution
The mobile terminal incorporates a metal frame with strategically placed gaps and connectors, utilizing the frame as a main radiator and leveraging the clearance zone on the printed wiring board for wiring, feeding, and matching, allowing for an integrated antenna design that eliminates the need for additional antenna elements and simplifies testing by avoiding adjustments to the metal frame's shape and dimension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is disposed on an isolated plastic bracket or plastic shell using traditional production processes, then the antenna testing can be performed without essential difference from traditional nonmetal frame terminals, but the cost is high and the metal frame cannot be integrated with the antenna causing poor RF performance
Solution Approach 1:
The patent merges the metal frame with the antenna structure by using the metal frame itself as part of the antenna radiator. The frame is designed with specific geometric shapes and dimensions that serve both structural support functions and electromagnetic radiation functions, eliminating the need for separate antenna elements and plastic brackets.
Solution Approach 2:
The metal frame is designed to serve multiple functions simultaneously: it provides mechanical support for the housing, acts as the antenna radiator for wireless communication, and serves as the grounding structure. This multi-functionality reduces component count and simplifies the overall device structure.
2Reliability
If the metal frame is divided into several segments with gaps and ground points to be directly fed, then the antenna performance can be optimized, but it is difficult to perform manual testing when the size of the metal frame mismatches the resonance and radiation, and the production period will be prolonged if new molds are required
Solution Approach 1:
The patent introduces adjustable elements into the metal frame structure, such as movable connectors or adjustable gap widths, that allow the antenna dimensions to be tuned after manufacturing. This enables optimization of resonance and radiation performance without requiring new molds, as the adjustments can be made through simple mechanical modifications rather than complete remanufacturing.
Solution Approach 2:
The design allows for easy modification of key geometric parameters of the metal frame, such as the width of gaps, the position of ground points, and the overall dimensions of radiating elements. These parameter changes can be implemented through adjustable mechanisms or post-manufacturing modifications, enabling rapid prototyping and testing without investing in new tooling.
3Adaptability or versatility
If additional antenna elements are used to achieve integrated design with the metal frame, then the antenna space utilization can be improved, but the cost increases and the structure becomes more complex
Solution Approach 1:
The patent combines the functions of structural support and electromagnetic radiation into a single integrated metal frame structure. The frame's geometric design is optimized to serve as the antenna radiator, eliminating the need for separate antenna elements and reducing overall device complexity while maintaining effective space utilization.
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 approach reduces costs by eliminating the need for additional antenna elements, simplifies antenna testing, and optimizes space usage on the printed wiring board while ensuring robust RF performance.
Implementation Method 1
The first antenna includes: a main radiator of the first antenna consisting of a part of the first frame and a part of the third frame
Implementation Method 2
a first inductor, having a first terminal connected with the second terminal of the second part and a second terminal connected with the ground of the printed wiring board
Data Source
AI summary
A mobile terminal and an antenna of a mobile terminal are provided. The mobile terminal includes: a printed wiring board; a housing; a metal frame surrounding the housing, having a first frame, a second frame and a third frame, the first frame having a first gap; a first connector connected with a part of the first frame; a second connector connected with the third frame and a ground of the printed wiring board; and a first antenna, including: a main radiator; a first part; a second part; a first inductor; a third part; a fourth part a second inductor connected with the fourth part and a fifth part connected with the second inductor and a first feed terminal of the printed wiring board.