Sheet Metal Notch Antenna for Interference Reduction
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Solution Overview
Problem
The challenge is to enhance communication quality in electronic devices with multiple antennas while minimizing interference and maintaining a compact design, as the miniaturization of devices limits the space available for antennas and requires maintaining distance between them.
Innovation Solution
The electronic device incorporates a sheet metal member at the front side that protects the display and includes a notch, dividing it into an external and internal part, where the external part functions as a second antenna, allowing for increased spacing between antennas and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are mounted to support multiple communication systems and MIMO, then communication functionality is improved, but antenna interference increases and communication quality deteriorates
Solution Approach 1:
The sheet metal member is divided into multiple functional regions by notches, creating separate antenna regions. The first antenna is formed in a first region, the second antenna in a second region, and the third antenna in a third region. This segmentation allows multiple antennas to coexist with sufficient spacing, reducing interference while maintaining multiple communication functions.
2Adaptability or versatility
If more antennas are added to support multiple communication systems, then communication adaptability is improved, but device volume increases
Solution Approach 1:
The sheet metal member serves dual purposes: it protects the display from external impacts and simultaneously functions as the substrate for mounting multiple antennas. By integrating the antenna mounting function into the existing protective sheet metal structure, the patent avoids increasing device volume while supporting multiple communication systems.
Solution Approach 2:
The sheet metal member is designed as a multi-functional component that provides both mechanical protection for the display and electromagnetic radiation/reception functions for multiple antennas. This multi-functionality eliminates the need for separate antenna mounting structures, maintaining compact device dimensions.
3Reliability
If antenna spacing is increased to reduce interference, then communication quality is improved, but device volume increases
Solution Approach 1:
The notches create distinct spatial regions on the two-dimensional sheet metal surface, allowing antennas to be positioned in different zones. The first antenna is in a first region separated by a first notch, the second antenna in a second region separated by a second notch, and the third antenna in a third region. This dimensional organization on the sheet metal plane enables sufficient spacing without increasing overall device volume.
Data Source
AI summary
In order to further improve the communication quality, the electronic device (10) according to this disclosure includes the antenna (17) disposed on the case back (15) provided at the back side of the device, the display (11) provided on the front side of the device and the sheet metal member (12) that is provided at the front side of the device and is configured to protect the display (11). The sheet metal member (12) has a notch (121) extending in a specific direction, and the notch (121) divides the sheet metal member (12) into the external part (12A) and the internal part (12B) of the notch in the direction intersecting with a specific direction, and the external part (12A) functions as the antenna (18).