Antenna Circuit Segmentation for Compact Terminal Devices
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Solution Overview
Problem
In compactly designed terminal devices, such as mobile phones, the limited space available for antennas increases the device's overall size due to the need for a battery cover to enclose the antenna circuit on the outer surface, compromising antenna performance and device dimensions.
Innovation Solution
The antenna circuit is divided into a first antenna circuit on a non-exterior surface and a second antenna circuit on an exterior surface, connected via a penetrating connection hole, allowing for reduced size and maintaining performance by utilizing laser engraving technology for placement and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna circuit is disposed on the outer surface of the rear enclosure to maximize antenna performance, then the antenna performance is improved, but the device width increases due to the battery cover thickness
Solution Approach 1:
The antenna circuit is segmented into two parts: a first antenna circuit disposed on the non-exterior surface (inner surface) and a second antenna circuit disposed on the exterior surface (outer surface). This segmentation allows the antenna functionality to be distributed across different surfaces, eliminating the need for a dedicated battery cover while maintaining antenna performance.
Solution Approach 2:
The first antenna circuit on the non-exterior surface and the second antenna circuit on the exterior surface are merged into a single integrated antenna system through electrical connection via a connection hole. This merging allows the combined antenna circuit to achieve good antenna performance while avoiding the need for additional covering structures that would increase device width.
2Strength
If the battery cover encloses the antenna circuit on the outer surface, then the antenna circuit is protected, but the overall size of the terminal device increases
Solution Approach 1:
The antenna circuit is moved from a two-dimensional placement on the outer surface to a three-dimensional configuration that utilizes both the non-exterior surface and exterior surface of the terminal device. By disposing parts of the antenna circuit on the non-exterior surface, the design eliminates the need for a protruding battery cover, thereby reducing overall device volume while maintaining protection through the device's existing structural layers.
3Reliability
If laser direct structuring technology is applied to entire housings to maximize antenna performance, then antenna performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The antenna circuit is segmented into two parts disposed on different surfaces, which can be manufactured separately using laser direct structuring technology. This segmentation allows for simplified manufacturing processes on each surface while achieving the overall goal of maximizing antenna performance through the combined circuit configuration.
Data Source
AI summary
An antenna circuit includes a first antenna circuit, a second antenna circuit, and a connection hole. The first antenna circuit is disposed on a non-exterior surface of a terminal device; the second antenna circuit is disposed on an exterior surface of the terminal device, where the exterior surface is a surface of the terminal device visible to a user, and the non-exterior surface is disposed opposite to the exterior surface; and the connection hole penetrates through the non-exterior surface and the exterior surface, where the first antenna circuit and the second antenna circuit are electrically connected by using the connection hole.